--- loncom/interface/loncoursedata.pm 2002/08/30 17:11:43 1.26 +++ loncom/interface/loncoursedata.pm 2018/03/13 16:48:18 1.204 @@ -1,7 +1,6 @@ # The LearningOnline Network with CAPA -# (Publication Handler # -# $Id: loncoursedata.pm,v 1.26 2002/08/30 17:11:43 stredwic Exp $ +# $Id: loncoursedata.pm,v 1.204 2018/03/13 16:48:18 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -26,12 +25,11 @@ # http://www.lon-capa.org/ # ### - =pod =head1 NAME -loncoursedata +Apache::loncoursedata =head1 SYNOPSIS @@ -39,1306 +37,3258 @@ Set of functions that download and proce =head1 PACKAGES USED - Apache::Constants qw(:common :http) - Apache::lonnet() - Apache::lonhtmlcommon - HTML::TokeParser - GDBM_File + Apache::lonnet + Apache::longroup + Time::HiRes + Apache::lonmysql + LONCAPA + Digest::MD5 =cut package Apache::loncoursedata; use strict; -use Apache::Constants qw(:common :http); -use Apache::lonnet(); -use Apache::lonhtmlcommon; -use HTML::TokeParser; -use GDBM_File; +use Apache::lonnet; +use Apache::longroup(); +use Time::HiRes(); +use Apache::lonmysql(); +use LONCAPA; +use Digest::MD5(); + +=pod + +=head2 make_into_hash + +Turn a colon separated string into a hash and return a reference +to it. Numbering from 0 even elements are keys and odd elements +are values e.g. a:b:c:d creates a hash like + a => b, c =>d -=pod +=cut -=head1 DOWNLOAD INFORMATION +sub make_into_hash { + my $values = shift; + my %tmp = map { &unescape($_); } split(':',$values); + return \%tmp; +} -This section contains all the functions that get data from other servers -and/or itself. -=cut +{ # Begin scope of table identifiers -# ----- DOWNLOAD INFORMATION ------------------------------------------- +my $current_course =''; +my $symb_table; +my $part_table; +my $student_table; +my $groupnames_table; +my $students_groups_table; +my $performance_table; +my $parameters_table; +my $fulldump_response_table; +my $fulldump_part_table; +my $fulldump_timestamp_table; +my $weight_table; + +my @Tables; + + + +sub init_dbs { + my ($courseid,$drop) = @_; + &setup_table_names($courseid); + # + # Drop any of the existing tables + if ($drop) { + foreach my $table (@Tables) { + &Apache::lonmysql::drop_table($table); + } + } + # + # Note - changes to this table must be reflected in the code that + # stores the data (calls &Apache::lonmysql::store_row with this table + # id + my $symb_table_def = { + id => $symb_table, + permanent => 'no', + columns => [{ name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', + auto_inc => 'yes', }, + { name => 'symb', + type => 'MEDIUMTEXT', + restrictions => 'NOT NULL'}, + ], + 'PRIMARY KEY' => ['symb_id'], + }; + # + my $part_table_def = { + id => $part_table, + permanent => 'no', + columns => [{ name => 'part_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', + auto_inc => 'yes', }, + { name => 'part', + type => 'VARCHAR(100) BINARY', + restrictions => 'NOT NULL'}, + ], + 'PRIMARY KEY' => ['part (100)'], + 'KEY' => [{ columns => ['part_id']},], + }; + # + my $student_table_def = { + id => $student_table, + permanent => 'no', + columns => [{ name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', + auto_inc => 'yes', }, + { name => 'student', + type => 'VARCHAR(100) BINARY', + restrictions => 'NOT NULL UNIQUE'}, + { name => 'section', + type => 'VARCHAR(100) BINARY', + restrictions => 'NOT NULL'}, + { name => 'start', + type => 'INT', + restrictions => 'NOT NULL'}, + { name => 'end', + type => 'INT', + restrictions => 'NOT NULL'}, + { name => 'classification', + type => 'VARCHAR(100) BINARY', }, + { name => 'updatetime', + type => 'INT UNSIGNED'}, + { name => 'fullupdatetime', + type => 'INT UNSIGNED'}, + ], + 'PRIMARY KEY' => ['student_id'], + 'KEY' => [{ columns => ['student (100)', + 'section (100)', + 'start', + 'end']},], + }; + # + my $groupnames_table_def = { + id => $groupnames_table, + permanent => 'no', + columns => [{ name => 'group_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', + auto_inc => 'yes', }, + { name => 'groupname', + type => 'VARCHAR(100) BINARY', + restrictions => 'NOT NULL UNIQUE'}, + ], + 'PRIMARY KEY' => ['group_id'], + 'KEY' => [{ columns => ['groupname (100)',]},], + }; + # + my $students_groups_table_def = { + id => $students_groups_table, + permanent => 'no', + columns => [{ name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', }, + { name => 'group_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL', }, + ], + 'PRIMARY KEY' => ['student_id','group_id'], + 'KEY' => [{ columns => ['student_id'] }, + { columns => ['group_id'] },], + }; + # + my $performance_table_def = { + id => $performance_table, + permanent => 'no', + columns => [{ name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'part_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'part', + type => 'VARCHAR(100) BINARY', + restrictions => 'NOT NULL'}, + { name => 'solved', + type => 'TINYTEXT' }, + { name => 'tries', + type => 'SMALLINT UNSIGNED' }, + { name => 'awarded', + type => 'REAL' }, + { name => 'award', + type => 'TINYTEXT' }, + { name => 'awarddetail', + type => 'TINYTEXT' }, + { name => 'timestamp', + type => 'INT UNSIGNED'}, + ], + 'PRIMARY KEY' => ['symb_id','student_id','part_id'], + 'KEY' => [{ columns=>['student_id'] }, + { columns=>['symb_id'] },], + }; + # + my $fulldump_part_table_def = { + id => $fulldump_part_table, + permanent => 'no', + columns => [ + { name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'part_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'transaction', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'tries', + type => 'SMALLINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'award', + type => 'TINYTEXT' }, + { name => 'awarded', + type => 'REAL' }, + { name => 'previous', + type => 'SMALLINT UNSIGNED' }, +# { name => 'regrader', +# type => 'TINYTEXT' }, +# { name => 'afterduedate', +# type => 'TINYTEXT' }, + ], + 'PRIMARY KEY' => ['symb_id','part_id','student_id','transaction'], + 'KEY' => [ + { columns=>['symb_id'] }, + { columns=>['part_id'] }, + { columns=>['student_id'] }, + ], + }; + # + my $fulldump_response_table_def = { + id => $fulldump_response_table, + permanent => 'no', + columns => [ + { name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'part_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'response_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'transaction', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'awarddetail', + type => 'TINYTEXT' }, +# { name => 'message', +# type => 'CHAR BINARY'}, + { name => 'response_specific', + type => 'TINYTEXT' }, + { name => 'response_specific_value', + type => 'TINYTEXT' }, + { name => 'response_specific_2', + type => 'TINYTEXT' }, + { name => 'response_specific_value_2', + type => 'TINYTEXT' }, + { name => 'submission', + type => 'TEXT'}, + ], + 'PRIMARY KEY' => ['symb_id','part_id','response_id','student_id', + 'transaction'], + 'KEY' => [ + { columns=>['symb_id'] }, + { columns=>['part_id','response_id'] }, + { columns=>['student_id'] }, + ], + }; + my $fulldump_timestamp_table_def = { + id => $fulldump_timestamp_table, + permanent => 'no', + columns => [ + { name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'transaction', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'timestamp', + type => 'INT UNSIGNED'}, + ], + 'PRIMARY KEY' => ['symb_id','student_id','transaction'], + 'KEY' => [ + { columns=>['symb_id'] }, + { columns=>['student_id'] }, + { columns=>['transaction'] }, + ], + }; + # + my $parameters_table_def = { + id => $parameters_table, + permanent => 'no', + columns => [{ name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'student_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'parameter', + type => 'TINYTEXT', + restrictions => 'NOT NULL' }, + { name => 'value', + type => 'MEDIUMTEXT' }, + ], + 'PRIMARY KEY' => ['symb_id','student_id','parameter (255)'], + }; + # + my $weight_table_def = { + id => $weight_table, + permanent => 'no', + columns => [{ name => 'symb_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'part_id', + type => 'MEDIUMINT UNSIGNED', + restrictions => 'NOT NULL' }, + { name => 'weight', + type => 'REAL', + restrictions => 'NOT NULL' }, + ], + 'PRIMARY KEY' => ['symb_id','part_id'], + }; + # + # Create the tables + my $tableid; + $tableid = &Apache::lonmysql::create_table($symb_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating symb_table: ". + &Apache::lonmysql::get_error()); + return 1; + } + # + $tableid = &Apache::lonmysql::create_table($part_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating part_table: ". + &Apache::lonmysql::get_error()); + return 2; + } + # + $tableid = &Apache::lonmysql::create_table($student_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating student_table: ". + &Apache::lonmysql::get_error()); + return 3; + } + # + $tableid = &Apache::lonmysql::create_table($performance_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating preformance_table: ". + &Apache::lonmysql::get_error()); + return 5; + } + # + $tableid = &Apache::lonmysql::create_table($parameters_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating parameters_table: ". + &Apache::lonmysql::get_error()); + return 6; + } + # + $tableid = &Apache::lonmysql::create_table($fulldump_part_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating fulldump_part_table: ". + &Apache::lonmysql::get_error()); + return 7; + } + # + $tableid = &Apache::lonmysql::create_table($fulldump_response_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating fulldump_response_table: ". + &Apache::lonmysql::get_error()); + return 8; + } + $tableid = &Apache::lonmysql::create_table($fulldump_timestamp_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating fulldump_timestamp_table: ". + &Apache::lonmysql::get_error()); + return 9; + } + $tableid = &Apache::lonmysql::create_table($weight_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating weight_table: ". + &Apache::lonmysql::get_error()); + return 10; + } + $tableid = &Apache::lonmysql::create_table($groupnames_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating groupnames_table: ". + &Apache::lonmysql::get_error()); + return 11; + } + $tableid = &Apache::lonmysql::create_table($students_groups_table_def); + if (! defined($tableid)) { + &Apache::lonnet::logthis("error creating student_groups_table: ". + &Apache::lonmysql::get_error()); + return 12; + } + return 0; +} =pod -=item &DownloadClasslist() +=head2 delete_caches -Collects lastname, generation, middlename, firstname, PID, and section for each -student from their environment database. The section data is also download, though -it is in a rough format, and is processed later. The list of students is built from -collecting a classlist for the course that is to be displayed. Once the classlist -has been downloaded, its date stamp is recorded. Unless the datestamp for the -class database is reset or is modified, this data will not be downloaded again. -Also, there was talk about putting the fullname and section -and perhaps other pieces of data into the classlist file. This would -reduce the number of different file accesses and reduce the amount of -processing on this side. +Drops all of the tables in the local mysql cache associated with the +specified course id. -=over 4 +TODO: The drops should be pushed into lonmysql to further isolate +mysql code from other modules. -Input: $courseID, $lastDownloadTime, $c +=cut +sub delete_caches { + my $courseid = shift; + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + &setup_table_names($courseid); + # + my $dbh = &Apache::lonmysql::get_dbh(); + foreach my $table (@Tables) { + my $command = 'DROP TABLE '.$table.';'; + $dbh->do($command); + if ($dbh->err) { + &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr); + } + } + return; +} -$courseID: The id of the course -$lastDownloadTime: This is the date stamp for when this information was -last gathered. If it is set to Not downloaded, it will gather the data -again, though it currently does not remove the old data. +my $have_read_part_table = 0; +my %ids_by_part; +my %parts_by_id; + +sub get_part_id { + my ($part) = @_; + $part = 0 if (! defined($part)); + if (! $have_read_part_table) { + my @Result = &Apache::lonmysql::get_rows($part_table); + foreach (@Result) { + $ids_by_part{$_->[1]}=$_->[0]; + } + $have_read_part_table = 1; + } + if (! exists($ids_by_part{$part})) { + &Apache::lonmysql::store_row($part_table,[undef,$part]); + undef(%ids_by_part); + my @Result = &Apache::lonmysql::get_rows($part_table); + foreach (@Result) { + $ids_by_part{$_->[1]}=$_->[0]; + } + } + return $ids_by_part{$part} if (exists($ids_by_part{$part})); + return undef; # error +} -$c: The connection class that can determine if the browser has aborted. It -is used to short circuit this function so that it does not continue to -get information when there is no need. +sub get_part { + my ($part_id) = @_; + if (! exists($parts_by_id{$part_id}) || + ! defined($parts_by_id{$part_id}) || + $parts_by_id{$part_id} eq '') { + my @Result = &Apache::lonmysql::get_rows($part_table); + foreach (@Result) { + $parts_by_id{$_->[0]}=$_->[1]; + } + } + return $parts_by_id{$part_id} if(exists($parts_by_id{$part_id})); + return undef; # error +} -Output: \%classlist -\%classlist: A pointer to a hash containing the following data: +my $have_read_symb_table = 0; +my %ids_by_symb; +my %symbs_by_id; + +sub get_symb_id { + my ($symb) = @_; + if (! $have_read_symb_table) { + my @Result = &Apache::lonmysql::get_rows($symb_table); + foreach (@Result) { + $ids_by_symb{$_->[1]}=$_->[0]; + } + $have_read_symb_table = 1; + } + if (! exists($ids_by_symb{$symb})) { + &Apache::lonmysql::store_row($symb_table,[undef,$symb]); + undef(%ids_by_symb); + my @Result = &Apache::lonmysql::get_rows($symb_table); + foreach (@Result) { + $ids_by_symb{$_->[1]}=$_->[0]; + } + } + return $ids_by_symb{$symb} if(exists( $ids_by_symb{$symb})); + return undef; # error +} --A list of student name:domain (as keys) (known below as $name) +sub get_symb { + my ($symb_id) = @_; + if (! exists($symbs_by_id{$symb_id}) || + ! defined($symbs_by_id{$symb_id}) || + $symbs_by_id{$symb_id} eq '') { + my @Result = &Apache::lonmysql::get_rows($symb_table); + foreach (@Result) { + $symbs_by_id{$_->[0]}=$_->[1]; + } + } + return $symbs_by_id{$symb_id} if(exists( $symbs_by_id{$symb_id})); + return undef; # error +} --A hash pointer for each student containing lastname, generation, firstname, -middlename, and PID : Key is $name.studentInformation +my $have_read_student_table = 0; +my %ids_by_student; +my %students_by_id; + +sub get_student_id { + my ($sname,$sdom) = @_; + my $student = $sname.':'.$sdom; + if (! $have_read_student_table) { + my @Result = &Apache::lonmysql::get_rows($student_table); + foreach (@Result) { + $ids_by_student{$_->[1]}=$_->[0]; + } + $have_read_student_table = 1; + } + if (! exists($ids_by_student{$student})) { + &populate_student_table(); + undef(%ids_by_student); + undef(%students_by_id); + my @Result = &Apache::lonmysql::get_rows($student_table); + foreach (@Result) { + $ids_by_student{$_->[1]}=$_->[0]; + } + } + return $ids_by_student{$student} if(exists( $ids_by_student{$student})); + return undef; # error +} --A hash pointer to each students section data : Key is $name.section +sub get_student { + my ($student_id) = @_; + if (! exists($students_by_id{$student_id}) || + ! defined($students_by_id{$student_id}) || + $students_by_id{$student_id} eq '') { + my @Result = &Apache::lonmysql::get_rows($student_table); + foreach (@Result) { + $students_by_id{$_->[0]}=$_->[1]; + } + } + return $students_by_id{$student_id} if(exists($students_by_id{$student_id})); + return undef; # error +} --If there was an error in dump, it will be returned in the hash. See -the error codes for dump in lonnet. Also, an error key will be -generated if an abort occurs. +sub populate_student_table { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + &init_dbs($courseid,0); + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = 'INSERT IGNORE INTO '.$student_table. + "(student,section,start,end) VALUES "; + my $cdom = $env{'course.'.$courseid.'.domain'}; + my $cnum = $env{'course.'.$courseid.'.num'}; + my $classlist = &get_classlist($cdom,$cnum); + my $student_count=0; + while (my ($student,$data) = each %$classlist) { + my ($section,$start,$end) = ($data->[&CL_SECTION()], + $data->[&CL_START()], + $data->[&CL_END()]); + if ($section eq '' || $section =~ /^\s*$/) { + $section = 'none'; + } + if (!defined($start)) { $start = 0; } + if (!defined($end)) { $end = 0; } + $request .= "('".$student."','".$section."','".$start."','".$end."'),"; + $student_count++; + } + return if ($student_count == 0); + chop($request); + $dbh->do($request); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occurred executing \n". + $request); + } + return; +} -=back +my $have_read_groupnames_table = 0; +my %ids_by_groupname; -=cut +sub get_group_id { + my ($groupname) = @_; + if (! $have_read_groupnames_table) { + my @Result = &Apache::lonmysql::get_rows($groupnames_table); + foreach (@Result) { + $ids_by_groupname{$_->[1]}=$_->[0]; + } + $have_read_groupnames_table = 1; + } + if (! exists($ids_by_groupname{$groupname})) { + &populate_groupnames_table(); + undef(%ids_by_groupname); + my @Result = &Apache::lonmysql::get_rows($groupnames_table); + foreach (@Result) { + $ids_by_groupname{$_->[1]}=$_->[0]; + } + } + if (exists($ids_by_groupname{$groupname})) { + return $ids_by_groupname{$groupname}; + } + return undef; # error +} -sub DownloadClasslist { - my ($courseID, $lastDownloadTime, $c)=@_; - my ($courseDomain,$courseNumber)=split(/\_/,$courseID); - my %classlist; - - my $modifiedTime = &Apache::lonnet::GetFileTimestamp($courseDomain, $courseNumber, - 'classlist.db', - $Apache::lonnet::perlvar{'lonUsersDir'}); - - # Always download the information if lastDownloadTime is set to - # Not downloaded, otherwise it is only downloaded if the file - # has been updated and has a more recent date stamp - if($lastDownloadTime ne 'Not downloaded' && - $lastDownloadTime >= $modifiedTime && $modifiedTime >= 0) { - # Data is not gathered so return UpToDate as true. This - # will be interpreted in ProcessClasslist - $classlist{'lastDownloadTime'}=time; - $classlist{'UpToDate'} = 'true'; - return \%classlist; +sub populate_groupnames_table { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + &setup_table_names($courseid); + &init_dbs($courseid,0); + my $dbh = &Apache::lonmysql::get_dbh(); + my $cdom = $env{'course.'.$courseid.'.domain'}; + my $cnum = $env{'course.'.$courseid.'.num'}; + my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum); + return if (!%curr_groups); + my $request = 'INSERT IGNORE INTO '.$groupnames_table. + '(groupname) VALUES '; + foreach my $groupname (sort(keys(%curr_groups)),'none') { + $request .= "('".$groupname."'),"; + } + chop($request); + $dbh->do($request); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occurred executing \n". + $request); } + return; +} + +my $have_read_studentsgroups_table = 0; +my %groupids_by_studentid; - %classlist=&Apache::lonnet::dump('classlist',$courseDomain, $courseNumber); - foreach(keys (%classlist)) { - if(/^(con_lost|error|no_such_host)/i) { - return \%classlist; +sub get_students_groupids { + my ($student_id) = @_; + if (! $have_read_studentsgroups_table) { + my @Result = &Apache::lonmysql::get_rows($students_groups_table); + foreach (@Result) { + push(@{$groupids_by_studentid{$_->[0]}},$_->[1]); } + $have_read_studentsgroups_table = 1; } - - foreach my $name (keys(%classlist)) { - if(defined($c) && ($c->aborted())) { - $classlist{'error'}='aborted'; - return \%classlist; + if (! exists($groupids_by_studentid{$student_id})) { + &populate_students_groups_table(); + undef(%groupids_by_studentid); + my @Result = &Apache::lonmysql::get_rows($students_groups_table); + foreach (@Result) { + push(@{$groupids_by_studentid{$_->[0]}},$_->[1]); } + } + if (exists($groupids_by_studentid{$student_id})) { + if (ref($groupids_by_studentid{$student_id}) eq 'ARRAY') { + return @{$groupids_by_studentid{$student_id}}; + } + } + return undef; # error +} - my ($studentName,$studentDomain) = split(/\:/,$name); - # Download student environment data, specifically the full name and id. - my %studentInformation=&Apache::lonnet::get('environment', - ['lastname','generation', - 'firstname','middlename', - 'id'], - $studentDomain, - $studentName); - $classlist{$name.':studentInformation'}=\%studentInformation; - if($c->aborted()) { - $classlist{'error'}='aborted'; - return \%classlist; - } +sub populate_students_groups_table { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + &init_dbs($courseid,0); + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = 'INSERT IGNORE INTO '.$students_groups_table. + "(student_id,group_id) VALUES "; + my $cdom = $env{'course.'.$courseid.'.domain'}; + my $cnum = $env{'course.'.$courseid.'.num'}; + my ($classlist,$keylist) = &get_classlist($cdom,$cnum); + my ($classgroups,$studentgroups) = &get_group_memberships($classlist, + $keylist, + $cdom,$cnum); + my $record_count = 0; + foreach my $student (sort(keys(%{$classgroups}))) { + my $student_id = &get_student_id(split(':',$student)); + my @studentsgroups = &get_students_groups($student,'Active',$classgroups); + if (@studentsgroups < 1) { + @studentsgroups = ('none'); + } + foreach my $groupname (@studentsgroups) { + my $group_id = &get_group_id($groupname); + $request .= "('".$student_id."','".$group_id."'),"; + $record_count++; + } + } + return if ($record_count == 0); + chop($request); + $dbh->do($request); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occurred executing \n". + $request); + } + return; +} + +sub clear_internal_caches { + $have_read_part_table = 0; + undef(%ids_by_part); + undef(%parts_by_id); + $have_read_symb_table = 0; + undef(%ids_by_symb); + undef(%symbs_by_id); + $have_read_student_table = 0; + undef(%ids_by_student); + undef(%students_by_id); + $have_read_groupnames_table = 0; + undef(%ids_by_groupname); +} + +sub symb_is_for_task { + my ($symb) = @_; + return ($symb =~ /\.task$/); +} + - #Section - my %section=&Apache::lonnet::dump('roles',$studentDomain,$studentName); - $classlist{$name.':sections'}=\%section; +sub update_full_student_data { + my ($sname,$sdom,$courseid) = @_; + # + # Set up database names + &setup_table_names($courseid); + # + my $student_id = &get_student_id($sname,$sdom); + my $student = $sname.':'.$sdom; + # + my $returnstatus = 'okay'; + # + # Download students data + my $time_of_retrieval = time; + my @tmp = &Apache::lonnet::dumpstore($courseid,$sdom,$sname); + if (@tmp && $tmp[0] =~ /^error/) { + $returnstatus = 'error retrieving full student data'; + return $returnstatus; + } elsif (! @tmp) { + $returnstatus = 'okay: no student data'; + return $returnstatus; + } + my %studentdata = @tmp; + # + # Get database handle and clean out the tables + my $dbh = &Apache::lonmysql::get_dbh(); + $dbh->do('DELETE FROM '.$fulldump_response_table.' WHERE student_id='. + $student_id); + $dbh->do('DELETE FROM '.$fulldump_part_table.' WHERE student_id='. + $student_id); + $dbh->do('DELETE FROM '.$fulldump_timestamp_table.' WHERE student_id='. + $student_id); + # + # Parse and store the data into a form we can handle + my $partdata; + my $respdata; + while (my ($key,$value) = each(%studentdata)) { + next if ($key =~ /^(\d+):(resource$|subnum$|keys:)/); + my ($transaction,$symb,$parameter) = split(':',$key); + $symb = &unescape($symb); + $parameter = &unescape($parameter); + my $symb_id = &get_symb_id($symb); + if ($parameter eq 'timestamp') { + # We can deal with 'timestamp' right away + my @timestamp_storage = ($symb_id,$student_id, + $transaction,$value); + my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table. + " VALUES ('".join("','",@timestamp_storage)."');"; + $dbh->do($store_command); + if ($dbh->err()) { + &Apache::lonnet::logthis('unable to execute '.$store_command); + &Apache::lonnet::logthis($dbh->errstr()); + } + next; + } elsif ($parameter eq 'version') { + next; + } elsif (&symb_is_for_task($symb)) { + next if ($parameter !~ /^resource\.(.*)\.(award| + awarded| + solved| + submission| + portfiles| + status| + version| + regrader)\s*$/x); + my ($version_and_part_id, $field) = ($1,$2); + + next if ($version_and_part_id !~ /\./ + && $field ne 'regrader' && $field ne 'version'); + + my ($version, $part, $instance) = + split(/\./,$version_and_part_id); + + #skip and instance dimension or criteria specific data + next if (defined($instance) + && $instance ne $field + && $instance ne 'bridgetask'); + + if (!defined($part)) { + $part = $version; + } + my $resp_id = &get_part_id('0'); + my $part_id = &get_part_id($part); + + if ($field eq 'version') { + # for tasks each version is an attempt at it thus + # version -> tries + $partdata->{$symb_id}{$part_id}{$transaction}{'tries'}= + $value; + # at new version time the record gets reset thus adding a + # virtual response awarddetail of 'new_version' + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}='status'; + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}='new_version'; + + } elsif ($field eq 'award' || $field eq 'awarded' + || $field eq 'solved') { + $partdata->{$symb_id}{$part_id}{$transaction}{$field}= + $value; + } elsif ($field eq 'portfiles') { + # tasks only accepts portfolio submissions + $value = $dbh->quote($value); + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'submission'}=$value; + } elsif ($field eq 'status') { + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific'}=$field; + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value'}=$value; + } elsif ($field eq 'regrader') { + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_2'}=$field; + $respdata->{$symb_id}{$part_id}{$resp_id}{$transaction}{'response_specific_value_2'}=$value; + } + } elsif ($parameter =~ /^resource\.(.*)\.(tries| + award| + awarded| + previous| + solved| + awarddetail| + submission| + submissiongrading| + molecule)\s*$/x){ + # we do not have enough information to store an + # entire row, so we save it up until later. + my ($part_and_resp_id,$field) = ($1,$2); + my ($part,$part_id,$resp,$resp_id); + if ($part_and_resp_id =~ /\./) { + ($part,$resp) = split(/\./,$part_and_resp_id); + $part_id = &get_part_id($part); + $resp_id = &get_part_id($resp); + } else { + $part_id = &get_part_id($part_and_resp_id); + } + # Deal with part specific data + if ($field =~ /^(tries|award|awarded|previous)$/) { + $partdata->{$symb_id}->{$part_id}->{$transaction}->{$field}=$value; + } + # deal with response specific data + if (defined($resp_id) && + $field =~ /^(awarddetail| + submission| + submissiongrading| + molecule)$/x) { + if ($field eq 'submission') { + # We have to be careful with user supplied input. + # most of the time we are okay because it is escaped. + # However, there is one wrinkle: submissions which end in + # and odd number of '\' cause insert errors to occur. + # Best trap this somehow... + $value = $dbh->quote($value); + } + if ($field eq 'submissiongrading' || + $field eq 'molecule') { + $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific'}=$field; + $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{'response_specific_value'}=$value; + } else { + $respdata->{$symb_id}->{$part_id}->{$resp_id}->{$transaction}->{$field}=$value; + } + } + } + } + ## + ## Store the part data + my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table. + ' VALUES '."\n"; + my $store_rows = 0; + while (my ($symb_id,$hash1) = each (%$partdata)) { + while (my ($part_id,$hash2) = each (%$hash1)) { + while (my ($transaction,$data) = each (%$hash2)) { + $store_command .= "('".join("','",$symb_id,$part_id, + $student_id, + $transaction, + $data->{'tries'}, + $data->{'award'}, + $data->{'awarded'}, + $data->{'previous'})."'),"; + $store_rows++; + } + } + } + if ($store_rows) { + chop($store_command); + $dbh->do($store_command); + if ($dbh->err) { + $returnstatus = 'error saving part data'; + &Apache::lonnet::logthis('insert error '.$dbh->errstr()); + &Apache::lonnet::logthis("While attempting\n".$store_command); + } + } + ## + ## Store the response data + $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table. + ' VALUES '."\n"; + $store_rows = 0; + while (my ($symb_id,$hash1) = each (%$respdata)) { + while (my ($part_id,$hash2) = each (%$hash1)) { + while (my ($resp_id,$hash3) = each (%$hash2)) { + while (my ($transaction,$data) = each (%$hash3)) { + my $submission = $data->{'submission'}; + # We have to be careful with user supplied input. + # most of the time we are okay because it is escaped. + # However, there is one wrinkle: submissions which end in + # and odd number of '\' cause insert errors to occur. + # Best trap this somehow... + $submission = $dbh->quote($submission); + $store_command .= "('". + join("','",$symb_id,$part_id, + $resp_id,$student_id, + $transaction, + $data->{'awarddetail'}, + $data->{'response_specific'}, + $data->{'response_specific_value'}, + $data->{'response_specific_2'}, + $data->{'response_specific_value_2'}). + "',".$submission."),"; + $store_rows++; + } + } + } } + if ($store_rows) { + chop($store_command); + $dbh->do($store_command); + if ($dbh->err) { + $returnstatus = 'error saving response data'; + &Apache::lonnet::logthis('insert error '.$dbh->errstr()); + &Apache::lonnet::logthis("While attempting\n".$store_command); + } + } + ## + ## Update the students "current" data in the performance + ## and parameters tables. + my ($status,undef) = &store_student_data + ($sname,$sdom,$courseid, + &Apache::lonnet::convert_dump_to_currentdump(\%studentdata)); + if ($returnstatus eq 'okay' && $status ne 'okay') { + $returnstatus = 'error saving current data:'.$status; + } elsif ($status ne 'okay') { + $returnstatus .= ' error saving current data:'.$status; + } + ## + ## Update the students time...... + if ($returnstatus eq 'okay') { + &store_updatetime($student_id,$time_of_retrieval,$time_of_retrieval); + if ($dbh->err) { + if ($returnstatus eq 'okay') { + $returnstatus = 'error updating student time'; + } else { + $returnstatus = 'error updating student time'; + } + } + } + return $returnstatus; +} - $classlist{'UpToDate'} = 'false'; - $classlist{'lastDownloadTime'}=time; - return \%classlist; +sub update_student_data { + my ($sname,$sdom,$courseid) = @_; + # + # Set up database names + &setup_table_names($courseid); + # + my $student_id = &get_student_id($sname,$sdom); + my $student = $sname.':'.$sdom; + # + my $returnstatus = 'okay'; + # + # Download students data + my $time_of_retrieval = time; + my %student_data = &Apache::lonnet::currentdump($courseid,$sdom,$sname); + if (&Apache::lonnet::error(%student_data)) { + &Apache::lonnet::logthis('error getting data for '. + $sname.':'.$sdom.' in course '.$courseid. + ':'.(%student_data)[0]); + $returnstatus =(%student_data)[0] ; + return ($returnstatus,undef); + } + if (scalar(keys(%student_data)) < 1) { + return ('no data',undef); + } + my @Results = &store_student_data($sname,$sdom,$courseid,\%student_data); + # + # Set the students update time + if ($Results[0] eq 'okay') { + &store_updatetime($student_id,$time_of_retrieval); + } + # + return @Results; } -=pod +sub store_updatetime { + my ($student_id,$updatetime,$fullupdatetime)=@_; + my $values = ''; + if (defined($updatetime)) { + $values = 'updatetime='.$updatetime.' '; + } + if (defined($fullupdatetime)) { + if ($values ne '') { + $values .= ','; + } + $values .= 'fullupdatetime='.$fullupdatetime.' '; + } + return if ($values eq ''); + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = 'UPDATE '.$student_table.' SET '.$values. + ' WHERE student_id='.$student_id.' LIMIT 1'; + $dbh->do($request); +} -=item &DownloadCourseInformation() +sub store_student_data { + my ($sname,$sdom,$courseid,$student_data) = @_; + # + my $student_id = &get_student_id($sname,$sdom); + my $student = $sname.':'.$sdom; + # + my $returnstatus = 'okay'; + # + # Remove all of the students data from the table + my $dbh = &Apache::lonmysql::get_dbh(); + $dbh->do('DELETE FROM '.$performance_table.' WHERE student_id='. + $student_id); + $dbh->do('DELETE FROM '.$parameters_table.' WHERE student_id='. + $student_id); + # + # Store away the data + # + my $starttime = Time::HiRes::time; + my $elapsed = 0; + my $rows_stored; + my $store_parameters_command = 'INSERT IGNORE INTO '.$parameters_table. + ' VALUES '."\n"; + my $num_parameters = 0; + my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table. + ' VALUES '."\n"; + return ('error',undef) if (! defined($dbh)); + while (my ($current_symb,$param_hash) = each(%{$student_data})) { + # + # make sure the symb is set up properly + my $symb_id = &get_symb_id($current_symb); + # + # Parameters + while (my ($parameter,$value) = each(%$param_hash)) { + if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) { + my $sql_parameter = "('".join("','", + $symb_id,$student_id, + $parameter)."',". + $dbh->quote($value)."),\n"; + $num_parameters ++; + if ($sql_parameter !~ /''/) { + $store_parameters_command .= $sql_parameter; + #$rows_stored++; + } + } + } + # Performance + my %stored; + while (my ($parameter,$value) = each(%$param_hash)) { + next if ($parameter !~ /^resource\.(.*)\.(solved|awarded)$/); + my $part = $1; + my $which = $2; + next if ($part =~ /\./); + next if (exists($stored{$part})); + $stored{$part}++; + # + my $part_id = &get_part_id($part); + next if (!defined($part_id)); + + my ($solved,$awarded); + if ($which eq 'solved') { + $solved = $value; + $awarded = $param_hash->{'resource.'.$part.'.awarded'}; + } else { + $solved = $param_hash->{'resource.'.$part.'.solved'}; + $awarded = $value; + } + my $award = $param_hash->{'resource.'.$part.'.award'}; + my $awarddetail = $param_hash->{'resource.'.$part.'.awarddetail'}; + my $timestamp = $param_hash->{'timestamp'}; + my $tries = $param_hash->{'resource.'.$part.'.tries'}; + if (&symb_is_for_task($current_symb)) { + $tries = $param_hash->{'resource.'.$part.'.version'}; + } + # + $solved = '' if (! defined($solved)); + $tries = '' if (! defined($tries)); + $awarded = '' if (! defined($awarded)); + $award = '' if (! defined($award)); + $awarddetail = '' if (! defined($awarddetail)); + my $sql_performance = + "('".join("','",$symb_id,$student_id,$part_id,$part, + $solved,$tries,$awarded,$award, + $awarddetail,$timestamp)."'),\n"; + $store_performance_command .= $sql_performance; + $rows_stored++; + } + } + if (! $rows_stored) { return ($returnstatus, undef); } + $store_parameters_command =~ s|,\n$||; + $store_performance_command =~ s|,\n$||; + my $start = Time::HiRes::time; + $dbh->do($store_performance_command); + if ($dbh->err()) { + &Apache::lonnet::logthis('performance bigass insert error:'. + $dbh->errstr()); + &Apache::lonnet::logthis('command = '.$/.$store_performance_command); + $returnstatus = 'error: unable to insert performance into database'; + return ($returnstatus,$student_data); + } + $dbh->do($store_parameters_command) if ($num_parameters>0); + if ($dbh->err()) { + &Apache::lonnet::logthis('parameters bigass insert error:'. + $dbh->errstr()); + &Apache::lonnet::logthis('command = '.$/.$store_parameters_command); + &Apache::lonnet::logthis('rows_stored = '.$rows_stored); + &Apache::lonnet::logthis('student_id = '.$student_id); + $returnstatus = 'error: unable to insert parameters into database'; + return ($returnstatus,$student_data); + } + $elapsed += Time::HiRes::time - $start; + return ($returnstatus,$student_data); +} -Dump of all the course information for a single student. The data can be -pruned by making use of dumps regular expression arguement. This function -also takes a regular expression which it passes straight through to dump. -The data is no escaped, because it is done elsewhere. It also -checks the timestamp of the students course database file and only downloads -if it has been modified since the last download. -=over 4 +sub ensure_tables_are_set_up { + my ($courseid) = @_; + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + # Clean out package variables + &setup_table_names($courseid); + # + # if the tables do not exist, make them + my @CurrentTable = &Apache::lonmysql::tables_in_db(); + my ($found_symb,$found_student,$found_groups,$found_groupnames,$found_part, + $found_performance,$found_parameters,$found_fulldump_part, + $found_fulldump_response,$found_fulldump_timestamp, + $found_weight); + foreach (@CurrentTable) { + $found_symb = 1 if ($_ eq $symb_table); + $found_student = 1 if ($_ eq $student_table); + $found_groups = 1 if ($_ eq $students_groups_table); + $found_groupnames = 1 if ($_ eq $groupnames_table); + $found_part = 1 if ($_ eq $part_table); + $found_performance = 1 if ($_ eq $performance_table); + $found_parameters = 1 if ($_ eq $parameters_table); + $found_fulldump_part = 1 if ($_ eq $fulldump_part_table); + $found_fulldump_response = 1 if ($_ eq $fulldump_response_table); + $found_fulldump_timestamp = 1 if ($_ eq $fulldump_timestamp_table); + $found_weight = 1 if ($_ eq $weight_table); + } + if (!$found_symb || + !$found_student || !$found_part || + !$found_performance || !$found_parameters || + !$found_fulldump_part || !$found_fulldump_response || + !$found_fulldump_timestamp || !$found_weight ) { + if (&init_dbs($courseid,1)) { + return 'error'; + } + } +} -Input: $namedata, $courseID, $lastDownloadTime, $WhatIWant +sub ensure_current_data { + my ($sname,$sdom,$courseid) = @_; + my $status = 'okay'; # return value + # + $courseid = $env{'request.course.id'} if (! defined($courseid)); + &ensure_tables_are_set_up($courseid); + # + # Get the update time for the user + my $updatetime = 0; + my $getuserdir = 1; + my $modifiedtime = &Apache::lonnet::GetFileTimestamp + ($sdom,$sname,$courseid.'.db',$getuserdir); + # + if ($modifiedtime == -1) { + return ('no data',undef); + } + + my $student_id = &get_student_id($sname,$sdom); + &get_students_groupids($student_id); + my @Result = &Apache::lonmysql::get_rows($student_table, + "student_id ='$student_id'"); + my $data = undef; + if (@Result) { + $updatetime = $Result[0]->[6]; # Ack! This is dumb! + } + if ($modifiedtime > $updatetime) { + ($status,$data) = &update_student_data($sname,$sdom,$courseid); + } + return ($status,$data); +} -$namedata: student name:domain -$courseID: The id of the course +sub ensure_current_full_data { + my ($sname,$sdom,$courseid) = @_; + my $status = 'okay'; # return value + # + $courseid = $env{'request.course.id'} if (! defined($courseid)); + &ensure_tables_are_set_up($courseid); + # + # Get the update time for the user + my $getuserdir = 1; + my $modifiedtime = &Apache::lonnet::GetFileTimestamp + ($sdom,$sname,$courseid.'.db',$getuserdir); + # + my $student_id = &get_student_id($sname,$sdom); + &get_students_groupids($student_id); + my @Result = &Apache::lonmysql::get_rows($student_table, + "student_id ='$student_id'"); + my $updatetime; + if (@Result && ref($Result[0]) eq 'ARRAY') { + $updatetime = $Result[0]->[7]; + } + if (! defined($updatetime) || $modifiedtime > $updatetime) { + $status = &update_full_student_data($sname,$sdom,$courseid); + } + return $status; +} -$lastDownloadTime: This is the date stamp for when this information was -last gathered. If it is set to Not downloaded, it will gather the data -again, though it currently does not remove the old data. +sub ensure_current_groups { + my ($courseid) = @_; + my ($cdom,$cnum); + if (defined($courseid)) { + my %coursehash = &Apache::lonnet::coursedescription($courseid); + $cdom = $coursehash{'domain'}; + $cnum = $coursehash{'num'}; + } elsif ($env{'request.course.id'}) { + $courseid = $env{'request.course.id'}; + $cdom = $env{'course.'.$courseid.'.domain'}; + $cnum = $env{'course.'.$courseid.'.num'}; + } + if ($cdom eq '' || $cnum eq '') { + return 'error: invalid course'; + } + &setup_table_names($courseid); + my @CurrentTables = &Apache::lonmysql::tables_in_db(); + unless (grep(/^\Q$groupnames_table\E$/,@CurrentTables)) { + return; + } + # Get the update time for the groupnames table + my $getuserdir = 1; + my $modifiedtime = &Apache::lonnet::GetFileTimestamp + ($cdom,$cnum,'coursegroups.db',$getuserdir); + my %tableinfo = &Apache::lonmysql::table_information($groupnames_table); + my $updatetime; + if ($tableinfo{'Update_time'}) { + $updatetime = $tableinfo{'Update_time'}; + } + if (! defined($updatetime) || $modifiedtime > $updatetime) { + my (%groups_in_sql,%removegroups,$addgroup); + my %curr_groups = &Apache::longroup::coursegroups($cdom,$cnum); + my @Result = &Apache::lonmysql::get_rows($groupnames_table); + foreach my $row (@Result) { + my ($id,$name) = @{$row}; + unless (exists($curr_groups{$name})) { + $groups_in_sql{$name}=$id; + } elsif ($id) { + $removegroups{$id} = $name; + } + } + foreach my $group (keys(%curr_groups)) { + unless (exists($groups_in_sql{$group})) { + $addgroup = 1; + last; + } + } + if (keys(%removegroups)) { + my $dbh = &Apache::lonmysql::get_dbh(); + foreach my $group_id (keys(%removegroups)) { + my $command = 'DELETE FROM '.$groupnames_table.' WHERE group_id='. + $group_id; + $dbh->do($command); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occurred executing \n". + "SQL command: $command"); + } + } + } + if ($addgroup) { + &populate_groupnames_table($courseid); + } + } + return; +} -$WhatIWant: Regular expression used to get selected data with dump +sub ensure_current_students_groups { + my ($courseid) = @_; + my ($cdom,$cnum); + if (defined($courseid)) { + my %coursehash = &Apache::lonnet::coursedescription($courseid); + $cdom = $coursehash{'domain'}; + $cnum = $coursehash{'num'}; + } elsif ($env{'request.course.id'}) { + $courseid = $env{'request.course.id'}; + $cdom = $env{'course.'.$courseid.'.domain'}; + $cnum = $env{'course.'.$courseid.'.num'}; + } + &setup_table_names($courseid); + my @CurrentTables = &Apache::lonmysql::tables_in_db(); + unless (grep(/^\Q$students_groups_table\E$/,@CurrentTables)) { + return; + } + # Get the update time for the groupnames table + my $getuserdir = 1; + my $modifiedtime = &Apache::lonnet::GetFileTimestamp + ($cdom,$cnum,'groupmembership.db',$getuserdir); + my %tableinfo = &Apache::lonmysql::table_information($students_groups_table); + my $updatetime; + if ($tableinfo{'Update_time'}) { + $updatetime = $tableinfo{'Update_time'}; + } + if ((!defined($updatetime)) || ($modifiedtime > $updatetime)) { + if (&Apache::lonmysql::drop_table($students_groups_table)) { + if (&init_dbs($courseid)) { + return "error creating $students_groups_table\n"; + } else { + &populate_students_groups_table($courseid); + } + } + } + return; +} -Output: \%courseData +sub ensure_current_sections { + my ($courseid) = @_; + my ($cdom,$cnum); + if (defined($courseid)) { + my %coursehash = &Apache::lonnet::coursedescription($courseid); + $cdom = $coursehash{'domain'}; + $cnum = $coursehash{'num'}; + } elsif ($env{'request.course.id'}) { + $courseid = $env{'request.course.id'}; + $cdom = $env{'course.'.$courseid.'.domain'}; + $cnum = $env{'course.'.$courseid.'.num'}; + } + &setup_table_names($courseid); + my @CurrentTables = &Apache::lonmysql::tables_in_db(); + unless (grep(/^\Q$student_table\E$/,@CurrentTables)) { + return; + } + # Get the update time for the student table + my $getuserdir = 1; + my $modifiedtime = &Apache::lonnet::GetFileTimestamp + ($cdom,$cnum,'classlist.db',$getuserdir); + my %tableinfo = &Apache::lonmysql::table_information($student_table); + my $updatetime; + if ($tableinfo{'Update_time'}) { + $updatetime = $tableinfo{'Update_time'}; + } + if ((!defined($updatetime)) || ($modifiedtime > $updatetime)) { + &update_student_table($cdom,$cnum); + } + return; +} -\%courseData: A hash pointer to the raw data from the students course -database. +sub update_student_table { + my ($cdom,$cnum) = @_; + return unless (($cdom ne '') && ($cnum ne '')); + my (%roster,%sqldata); + my $classlist = &get_classlist($cdom,$cnum); + while (my ($student,$data) = each (%$classlist)) { + my ($section,$start,$end) = ($data->[&CL_SECTION()], + $data->[&CL_START()], + $data->[&CL_END()]); + if ($section eq '' || $section =~ /^\s*$/) { + $section = 'none'; + } + if ($start eq '') { $start = 0; } + if ($end eq '') { $end = 0; } + $roster{$student}{'section'} = $section; + $roster{$student}{'start'} = $start; + $roster{$student}{'end'} = $end; + } + my $dbh = &Apache::lonmysql::get_dbh(); + my $statement = "SELECT student_id,student,section,start,end FROM $student_table"; + my $sth = $dbh->prepare($statement); + $sth->execute(); + if ($sth->err()) { + &Apache::lonnet::logthis("Unable to execute MySQL request:"); + &Apache::lonnet::logthis("\n".$statement."\n"); + &Apache::lonnet::logthis("error is:".$sth->errstr()); + return undef; + } + foreach my $row (@{$sth->fetchall_arrayref}) { + my ($id,$student,$section,$start,$end) = (@$row); + if (ref($roster{$student}) eq 'HASH') { + if (($roster{$student}{'section'} ne $section) || + ($roster{$student}{'start'} ne $start) || + ($roster{$student}{'end'} ne $end)) { + $sqldata{$id} = { + section => $roster{$student}{'section'}, + start => $roster{$student}{'start'}, + end => $roster{$student}{'end'}, + }; + } + } + } + $sth->finish(); + if (keys(%sqldata)) { + foreach my $id (sort { $a <=> $b } keys(%sqldata)) { + my $request = "UPDATE $student_table SET section='$sqldata{$id}{section}'". + ", start='$sqldata{$id}{start}'". + ", end='$sqldata{$id}{end}' WHERE student_id='$id'"; + $dbh->do($request); + } + } + return; +} -=back +sub get_student_data_from_performance_cache { + my ($sname,$sdom,$symb,$courseid)=@_; + my $student = $sname.':'.$sdom if (defined($sname) && defined($sdom)); + &setup_table_names($courseid); + # + # Return hash + my $studentdata; + # + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = "SELECT ". + "d.symb,a.part,a.solved,a.tries,a.awarded,a.award,a.awarddetail,". + "a.timestamp "; + if (defined($student)) { + $request .= "FROM $student_table AS b ". + "LEFT JOIN $performance_table AS a ON b.student_id=a.student_id ". +# "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ". + "LEFT JOIN $symb_table AS d ON d.symb_id = a.symb_id ". + "WHERE student='$student'"; + if (defined($symb) && $symb ne '') { + $request .= " AND d.symb=".$dbh->quote($symb); + } + } elsif (defined($symb) && $symb ne '') { + $request .= "FROM $symb_table as d ". + "LEFT JOIN $performance_table AS a ON d.symb_id=a.symb_id ". +# "LEFT JOIN $part_table AS c ON c.part_id = a.part_id ". + "LEFT JOIN $student_table AS b ON b.student_id = a.student_id ". + "WHERE symb='".$dbh->quote($symb)."'"; + } + my $starttime = Time::HiRes::time; + my $rows_retrieved = 0; + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($sth->err()) { + &Apache::lonnet::logthis("Unable to execute MySQL request:"); + &Apache::lonnet::logthis("\n".$request."\n"); + &Apache::lonnet::logthis("error is:".$sth->errstr()); + return undef; + } + foreach my $row (@{$sth->fetchall_arrayref}) { + $rows_retrieved++; + my ($symb,$part,$solved,$tries,$awarded,$award,$awarddetail,$time) = + (@$row); + my $base = 'resource.'.$part; + $studentdata->{$symb}->{$base.'.solved'} = $solved; + $studentdata->{$symb}->{$base.'.tries'} = $tries; + $studentdata->{$symb}->{$base.'.awarded'} = $awarded; + $studentdata->{$symb}->{$base.'.award'} = $award; + $studentdata->{$symb}->{$base.'.awarddetail'} = $awarddetail; + $studentdata->{$symb}->{'timestamp'} = $time if (defined($time) && $time ne ''); + } + ## Get misc parameters + $request = 'SELECT c.symb,a.parameter,a.value '. + "FROM $student_table AS b ". + "LEFT JOIN $parameters_table AS a ON b.student_id=a.student_id ". + "LEFT JOIN $symb_table AS c ON c.symb_id = a.symb_id ". + "WHERE student='$student'"; + if (defined($symb) && $symb ne '') { + $request .= " AND c.symb=".$dbh->quote($symb); + } + $sth = $dbh->prepare($request); + $sth->execute(); + if ($sth->err()) { + &Apache::lonnet::logthis("Unable to execute MySQL request:"); + &Apache::lonnet::logthis("\n".$request."\n"); + &Apache::lonnet::logthis("error is:".$sth->errstr()); + if (defined($symb) && $symb ne '') { + $studentdata = $studentdata->{$symb}; + } + return $studentdata; + } + # + foreach my $row (@{$sth->fetchall_arrayref}) { + $rows_retrieved++; + my ($symb,$parameter,$value) = (@$row); + $studentdata->{$symb}->{$parameter} = $value; + } + # + if (defined($symb) && $symb ne '') { + $studentdata = $studentdata->{$symb}; + } + return $studentdata; +} -=cut -sub DownloadCourseInformation { - my ($namedata,$courseID,$lastDownloadTime,$WhatIWant)=@_; - my %courseData; - my ($name,$domain) = split(/\:/,$namedata); +sub get_current_state { + my ($sname,$sdom,$symb,$courseid,$forcedownload)=@_; + # + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + return () if (! defined($sname) || ! defined($sdom)); + # + my ($status,$data) = &ensure_current_data($sname,$sdom,$courseid); +# &Apache::lonnet::logthis +# ('sname = '.$sname. +# ' domain = '.$sdom. +# ' status = '.$status. +# ' data is '.(defined($data)?'defined':'undefined')); +# while (my ($symb,$hash) = each(%$data)) { +# &Apache::lonnet::logthis($symb."\n----------------------------------"); +# while (my ($key,$value) = each (%$hash)) { +# &Apache::lonnet::logthis(" ".$key." = ".$value); +# } +# } + # + if (defined($data) && defined($symb) && ref($data->{$symb})) { + return %{$data->{$symb}}; + } elsif (defined($data) && ! defined($symb) && ref($data)) { + return %$data; + } + if ($status eq 'no data') { + return (); + } else { + if ($status ne 'okay' && $status ne '') { + &Apache::lonnet::logthis('status = '.$status); + return ('error: '.$status,undef); + } + my $returnhash = &get_student_data_from_performance_cache($sname,$sdom, + $symb,$courseid); + return %$returnhash if (defined($returnhash)); + } + return (); +} - my $modifiedTime = &Apache::lonnet::GetFileTimestamp($domain, $name, - $courseID.'.db', - $Apache::lonnet::perlvar{'lonUsersDir'}); - if($lastDownloadTime >= $modifiedTime && $modifiedTime >= 0) { - # Data is not gathered so return UpToDate as true. This - # will be interpreted in ProcessClasslist - $courseData{$namedata.':lastDownloadTime'}=time; - $courseData{$namedata.':UpToDate'} = 'true'; - return \%courseData; +sub get_problem_statistics { + my ($Sections,$Groups,$status,$symb,$part,$courseid,$starttime,$endtime) = @_; + return if (! defined($symb) || ! defined($part)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + &setup_table_names($courseid); + my $symb_id = &get_symb_id($symb); + my $part_id = &get_part_id($part); + my $stats_table = &temp_table_name($courseid,'problem_stats'); + # + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + # + # Clean out the table + $dbh->do('DROP TABLE '.$stats_table); # May return an error + my $request = + 'CREATE TEMPORARY TABLE '.$stats_table.' '. + 'SELECT a.student_id,a.solved,a.award,a.awarded,a.tries '. + 'FROM '.$performance_table.' AS a '; + # + # See if we need to include some requirements on the students + if ((defined($Sections) && lc($Sections->[0]) ne 'all') || + (defined($status) && lc($status) ne 'any')) { + $request .= 'NATURAL LEFT JOIN '.$student_table.' AS b '; + } + my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d'); + if (defined($groups_join)) { + $request .= $groups_join; + } + $request .= ' WHERE a.symb_id='.$symb_id.' AND a.part_id='.$part_id; + # + # Limit the students included to those specified + my ($section_limits,$enrollment_limits)= + &limit_by_section_and_status($Sections,$status,'b'); + # + # Limit by starttime and endtime + my $time_requirements = undef; + if (defined($starttime)) { + $time_requirements .= 'a.timestamp>='.$starttime; + if (defined($endtime)) { + $time_requirements .= ' AND a.timestamp<='.$endtime; + } + } elsif (defined($endtime)) { + $time_requirements .= 'a.timestamp<='.$endtime; + } + if (defined($time_requirements)) { + $request .= ' AND '.$time_requirements; + } + if (defined($section_limits)) { + $request .= ' AND '.$section_limits; + } + if (defined($enrollment_limits)) { + $request .= ' AND '.$enrollment_limits; + } + # Limit by group, as required + if (defined($group_limits)) { + $request .= ' AND '.$group_limits; + } + # + # Finally, execute the request to create the temporary table + $dbh->do($request); + # + # Collect the first suite of statistics + $request = 'SELECT COUNT(*),SUM(tries),'. + 'AVG(tries),STD(tries) '. + 'FROM '.$stats_table; + my ($num,$tries,$mean,$STD) = &execute_SQL_request + ($dbh,$request); + # + $request = 'SELECT MAX(tries),MIN(tries) FROM '.$stats_table. + ' WHERE awarded>0'; + my ($max,$min) = &execute_SQL_request($dbh,$request); + # + $request = 'SELECT SUM(awarded) FROM '.$stats_table; + my ($Solved) = &execute_SQL_request($dbh,$request); + # + $request = 'SELECT SUM(awarded) FROM '.$stats_table. + " WHERE solved='correct_by_override'"; + my ($solved) = &execute_SQL_request($dbh,$request); + # + $Solved -= $solved; + # + $num = 0 if (! defined($num)); + $tries = 0 if (! defined($tries)); + $max = 0 if (! defined($max)); + $min = 0 if (! defined($min)); + $STD = 0 if (! defined($STD)); + $Solved = 0 if (! defined($Solved) || $Solved < 0); + $solved = 0 if (! defined($solved)); + # + # Compute the more complicated statistics + my $DegOfDiff = 'nan'; + $DegOfDiff = 1-($Solved)/$tries if ($tries>0); + # + my $SKEW = 'nan'; + my $wrongpercent = 0; + my $numwrong = 'nan'; + if ($num > 0) { + ($SKEW) = &execute_SQL_request($dbh,'SELECT SQRT(SUM('. + 'POWER(tries - '.$STD.',3)'. + '))/'.$num.' FROM '.$stats_table); + $numwrong = $num-$Solved; + $wrongpercent=int(10*100*$numwrong/$num)/10; + } + # + # Drop the temporary table + $dbh->do('DROP TABLE '.$stats_table); # May return an error + # + # Return result + return { num_students => $num, + tries => $tries, + max_tries => $max, + min_tries => $min, + mean_tries => $mean, + std_tries => $STD, + skew_tries => $SKEW, + num_solved => $Solved, + num_override => $solved, + num_wrong => $numwrong, + per_wrong => $wrongpercent, + deg_of_diff => $DegOfDiff }; +} + +## +## This is a helper for get_statistics +sub execute_SQL_request { + my ($dbh,$request)=@_; +# &Apache::lonnet::logthis($request); + my $sth = $dbh->prepare($request); + if (!$sth) { + die($dbh->errstr . " SQL: $request"); + } + $sth->execute(); + my $row = $sth->fetchrow_arrayref(); + if (ref($row) eq 'ARRAY' && scalar(@$row)>0) { + return @$row; } + return (); +} - # Download course data - if(!defined($WhatIWant)) { - # set the regular expression to everything by setting it to period - $WhatIWant = '.'; + +sub populate_weight_table { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + my $navmap = Apache::lonnavmaps::navmap->new(); + if (!defined($navmap)) { + &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/. + ' unable to get navmaps resource'.$/. + ' '.join(' ',(caller))); + return; } - %courseData=&Apache::lonnet::dump($courseID, $domain, $name, $WhatIWant); - $courseData{'UpToDate'} = 'false'; - $courseData{'lastDownloadTime'}=time; + my @sequences = $navmap->retrieveResources(undef, + sub { shift->is_map(); },1,0,1); + my @resources; + foreach my $seq (@sequences) { + push(@resources,$navmap->retrieveResources($seq, + sub {shift->is_gradable();}, + 0,0,0)); + } + if (! scalar(@resources)) { + &Apache::lonnet::logthis('loncoursedata::populate_weight_table:'.$/. + ' no resources returned for '.$courseid); + return; + } + # Since we use lonnet::EXT to retrieve problem weights, + # to ensure current data we must clear the caches out. + &Apache::lonnet::clear_EXT_cache_status(); + my $dbh = &Apache::lonmysql::get_dbh(); + my $request = 'INSERT IGNORE INTO '.$weight_table. + "(symb_id,part_id,weight) VALUES "; + my $weight; + foreach my $res (@resources) { + my $symb_id = &get_symb_id($res->symb); + foreach my $part (@{$res->parts}) { + my $part_id = &get_part_id($part); + $weight = &Apache::lonnet::EXT('resource.'.$part.'.weight', + $res->symb, + undef,undef,undef); + if (!defined($weight) || ($weight eq '')) { + $weight=1; + } + $request .= "('".$symb_id."','".$part_id."','".$weight."'),"; + } + } + $request =~ s/(,)$//; +# &Apache::lonnet::logthis('request = '.$/.$request); + $dbh->do($request); + if ($dbh->err()) { + &Apache::lonnet::logthis("error ".$dbh->errstr(). + " occurred executing \n". + $request); + } + return; +} - my %newData; - foreach (keys(%courseData)) { - # need to have the keys to be prepended with the name:domain of the - # student to reduce data collision later. - $newData{$namedata.':'.$_} = $courseData{$_}; +sub limit_by_start_end_time { + my ($starttime,$endtime,$table) = @_; + my $time_requirements = undef; + if (defined($starttime)) { + $time_requirements .= $table.".timestamp>='".$starttime."'"; + if (defined($endtime)) { + $time_requirements .= " AND ".$table.".timestamp<='".$endtime."'"; + } + } elsif (defined($endtime)) { + $time_requirements .= $table.".timestamp<='".$endtime."'"; } + return $time_requirements; +} + - return \%newData; +sub limit_by_section_and_status { + my ($Sections,$enrollment,$tablename) = @_; + my $student_requirements = undef; + if ( (defined($Sections) && $Sections->[0] ne 'all')) { + $student_requirements = '('. + join(' OR ', map { $tablename.".section='".$_."'" } @$Sections + ).')'; + } + my $enrollment_requirements=undef; + if (defined($enrollment) && $enrollment ne 'Any') { + my $now = time(); + if ( $enrollment eq 'Future' ) { + $enrollment_requirements = + "( $tablename.start > $now AND ". + "( $tablename.end = 0 OR $tablename.end > $now))"; + } elsif ( $enrollment eq 'Active' ) { + $enrollment_requirements = + "(( $tablename.start = 0 OR $tablename.start < $now ) AND ". + " ( $tablename.end = 0 OR $tablename.end > $now ))"; + } elsif ( $enrollment eq 'Expired' ) { + $enrollment_requirements = + "(( $tablename.start < $now ) AND ". + " ( $tablename.end < $now ))"; + } + } + return ($student_requirements,$enrollment_requirements); } -# ----- END DOWNLOAD INFORMATION --------------------------------------- -=pod -=head1 PROCESSING FUNCTIONS +sub limit_by_group { + my ($Groups,$stutable,$grptable,$stugrptab) = @_; + my $groups_join = undef; + my $group_limits = undef; + if ( (defined($Groups) && $Groups->[0] ne 'all')) { + $groups_join = + ' LEFT JOIN '.$students_groups_table. + ' AS '.$stugrptab.' ON '. + $stugrptab.'.student_id = '.$stutable.'.student_id'. + ' LEFT JOIN '.$groupnames_table. + ' AS '.$grptable.' ON '. + $stugrptab.'.group_id = '.$grptable.'.group_id '; + $group_limits = + ' ('. + join(' OR ', map { "$grptable.groupname='".$_."'" } @$Groups + ).')'; + } + return ($groups_join,$group_limits); +} -These functions process all the data for all the students. Also, they -are the functions that access the cache database for writing the majority of -the time. The downloading and caching were separated to reduce problems -with stopping downloading then can not tie hash to database later. -=cut +sub RNK_student { return 0; }; +sub RNK_score { return 1; }; -# ----- PROCESSING FUNCTIONS --------------------------------------- +sub rank_students_by_scores_on_resources { + my ($resources,$Sections,$Groups,$enrollment,$courseid,$starttime,$endtime, + $has_award_for) = @_; + return if (! defined($resources) || ! ref($resources) eq 'ARRAY'); + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + my ($section_limits,$enrollment_limits)= + &limit_by_section_and_status($Sections,$enrollment,'b'); + my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d'); + my $symb_limits = '('.join(' OR ',map {'a.symb_id='.&get_symb_id($_); + } @$resources + ).')'; + my ($award_col, $award_join, $award_clause) = ('', '', ''); + if ($has_award_for) { + my $resource_id = &get_symb_id($has_award_for); + $award_col = ", perf.awarded"; + $award_join = "LEFT JOIN $performance_table AS perf ON perf.symb_id" + ." = $resource_id AND perf.student_id = b.student_id "; + $award_clause = "AND perf.awarded IS NOT NULL"; + } + my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a'); + my $request = "SELECT b.student,SUM(a.awarded*w.weight) AS score " + ."$award_col FROM $performance_table AS a ". + "NATURAL LEFT JOIN $weight_table AS w ". + "LEFT JOIN $student_table AS b ON a.student_id=b.student_id ". + "$award_join $groups_join "; + my $limits; + if (defined($section_limits)) { + $limits .= $section_limits.' AND '; + } + if (defined($enrollment_limits)) { + $limits .= $enrollment_limits.' AND '; + } + if (defined($time_limits)) { + $limits .= $time_limits.' AND '; + } + if ($symb_limits ne '()') { + $limits .= $symb_limits.' AND '; + } + if (defined($group_limits)) { + $limits .= $group_limits.' AND '; + } + if ($limits) { + $limits =~ s/( AND )$//; # Remove extra conjunction + $request .= "WHERE $limits"; + } + $request .= " $award_clause GROUP BY a.student_id ORDER BY score, b.student"; + #&Apache::lonnet::logthis('request = '.$/.$request); + my $sth = $dbh->prepare($request) or die "Can't prepare $request"; + $sth->execute(); + my $rows = $sth->fetchall_arrayref(); + return ($rows); +} -=pod +sub get_sum_of_scores { + my ($symb,$part,$students,$courseid,$starttime,$endtime) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + if (defined($students) && + ((@$students == 0) || + (@$students == 1 && (! defined($students->[0]) || + $students->[0] eq '')) + ) + ){ + undef($students); + } + # + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a'); + my $request = 'SELECT SUM(a.awarded*w.weight),SUM(w.weight) FROM '. + $performance_table.' AS a '. + 'NATURAL LEFT JOIN '.$weight_table.' AS w '; + $request .= 'WHERE a.symb_id='.&get_symb_id($symb). + ' AND a.part_id='.&get_part_id($part); + if (defined($time_limits)) { + $request .= ' AND '.$time_limits; + } + if (defined($students)) { + $request .= ' AND ('. + join(' OR ',map {'a.student_id='.&get_student_id(split(':',$_)); + } @$students). + ')'; + } + my $sth = $dbh->prepare($request); + $sth->execute(); + my $rows = $sth->fetchrow_arrayref(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 1 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed, fetchrow_arrayrefed'. + $/.$request); + return (undef,undef); + } + return ($rows->[0],$rows->[1]); +} -=item &ProcessTopResourceMap() -Trace through the "big hash" created in rat/lonuserstate.pm::loadmap. -Basically, this function organizes a subset of the data and stores it in -cached data. The data stored is the problems, sequences, sequence titles, -parts of problems, and their ordering. Column width information is also -partially handled here on a per sequence basis. +sub score_stats { + my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + # + my ($section_limits,$enrollment_limits)= + &limit_by_section_and_status($Sections,$enrollment,'b'); + my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d'); + my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a'); + my @Symbids = map { &get_symb_id($_); } @{$symbs}; + # + my $stats_table = &temp_table_name($courseid,'problem_stats'); + my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids); + my $request = 'DROP TABLE '.$stats_table; + $dbh->do($request); + $request = + 'CREATE TEMPORARY TABLE '.$stats_table.' '. + 'SELECT a.student_id,'. + 'SUM(a.awarded*w.weight) AS score FROM '. + $performance_table.' AS a '. + 'NATURAL LEFT JOIN '.$weight_table.' AS w '. + 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '. + $groups_join; + my $limit = ' WHERE ('.$symb_restriction.')'; + if ($time_limits) { + $limit .= ' AND '.$time_limits; + } + if ($section_limits) { + $limit .= ' AND '.$section_limits; + } + if ($enrollment_limits) { + $limit .= ' AND '.$enrollment_limits; + } + if ($group_limits) { + $limit .= ' AND '.$group_limits; + } + $request .= $limit.' GROUP BY a.student_id'; +# &Apache::lonnet::logthis('request = '.$/.$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + $request = + 'SELECT AVG(score),STD(score),MAX(score),MIN(score),COUNT(score) '. + 'FROM '.$stats_table; + my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request); +# &Apache::lonnet::logthis('request = '.$/.$request); + + $request = 'SELECT SUM(weight) FROM '.$weight_table. + ' AS a WHERE ('.$symb_restriction.')'; + my ($max_possible) = &execute_SQL_request($dbh,$request); + # &Apache::lonnet::logthis('request = '.$/.$request); + return($min,$max,$ave,$std,$count,$max_possible); +} -=over 4 -Input: $cache, $c -$cache: A pointer to a hash to store the information +sub count_stats { + my ($Sections,$Groups,$enrollment,$symbs,$starttime,$endtime,$courseid)=@_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + # + my ($section_limits,$enrollment_limits)= + &limit_by_section_and_status($Sections,$enrollment,'b'); + my ($groups_join,$group_limits) = &limit_by_group($Groups,'b','c','d'); + my $time_limits = &limit_by_start_end_time($starttime,$endtime,'a'); + my @Symbids = map { &get_symb_id($_); } @{$symbs}; + # + my $stats_table = &temp_table_name($courseid,'problem_stats'); + my $symb_restriction = join(' OR ',map {'a.symb_id='.$_;} @Symbids); + my $request = 'DROP TABLE '.$stats_table; + $dbh->do($request); + $request = + 'CREATE TEMPORARY TABLE '.$stats_table.' '. + 'SELECT a.student_id,'. + 'SUM(a.awarded) AS count FROM '. + $performance_table.' AS a '. + 'LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '. + $groups_join; + my $limit = ' WHERE ('.$symb_restriction.')'; + if ($time_limits) { + $limit .= ' AND '.$time_limits; + } + if ($section_limits) { + $limit .= ' AND '.$section_limits; + } + if ($enrollment_limits) { + $limit .= ' AND '.$enrollment_limits; + } + if ($group_limits) { + $limit .= ' AND '.$group_limits; + } + $request .= $limit.' GROUP BY a.student_id'; +# &Apache::lonnet::logthis('request = '.$/.$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + $request = + 'SELECT AVG(count),STD(count),MAX(count),MIN(count),COUNT(count) '. + 'FROM '.$stats_table; + my ($ave,$std,$max,$min,$count) = &execute_SQL_request($dbh,$request); +# &Apache::lonnet::logthis('request = '.$/.$request); + return($min,$max,$ave,$std,$count); +} -$c: The connection class used to determine if an abort has been sent to the -browser -Output: A string that contains an error message or "OK" if everything went -smoothly. +sub get_student_data { + my ($students,$courseid) = @_; + $courseid = $env{'request.course.id'} if (! defined($courseid)); + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + my $request = 'SELECT '. + 'student_id, student '. + 'FROM '.$student_table; + if (defined($students)) { + $request .= ' WHERE ('. + join(' OR ', map {'student_id='. + &get_student_id($_->{'username'}, + $_->{'domain'}) + } @$students + ).')'; + } + $request.= ' ORDER BY student_id'; + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 2 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) { + return $dataset; + } +} -=back +sub RD_student_id { return 0; } +sub RD_awarddetail { return 1; } +sub RD_response_eval { return 2; } +sub RD_response_eval_2 { return 3; } +sub RD_submission { return 4; } +sub RD_timestamp { return 5; } +sub RD_tries { return 6; } +sub RD_sname { return 7; } + +sub get_response_data { + my ($Sections,$Groups,$enrollment,$symb,$response,$courseid) = @_; + return undef if (! defined($symb) || + ! defined($response)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + &setup_table_names($courseid); + my $symb_id = &get_symb_id($symb); + if (! defined($symb_id)) { + &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid); + return undef; + } + my $response_id = &get_part_id($response); + if (! defined($response_id)) { + &Apache::lonnet::logthis('Unable to find id for '.$response.' in '.$courseid); + return undef; + } + # + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + # + my ($student_requirements,$enrollment_requirements) = + &limit_by_section_and_status($Sections,$enrollment,'d'); + my ($groups_join,$group_limits) = &limit_by_group($Groups,'d','e','f'); + my $request = 'SELECT '. + 'a.student_id, a.awarddetail, a.response_specific_value, '. + 'a.response_specific_value_2, a.submission, b.timestamp, '. + 'c.tries, d.student '. + 'FROM '.$fulldump_response_table.' AS a '. + 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '. + 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '. + 'a.transaction = b.transaction '. + 'LEFT JOIN '.$fulldump_part_table.' AS c '. + 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '. + 'a.part_id=c.part_id AND a.transaction = c.transaction '. + 'LEFT JOIN '.$student_table.' AS d '. + 'ON a.student_id=d.student_id '. + $groups_join; + my $limit = ' WHERE '. + 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id; + if (defined($student_requirements)) { + $limit .= ' AND '.$student_requirements; + } + if (defined($enrollment_requirements)) { + $limit .= ' AND '.$enrollment_requirements; + } + if (defined($group_limits)) { + $limit .= ' AND '.$group_limits; + } + $request .= $limit.' ORDER BY b.timestamp'; +# &Apache::lonnet::logthis("request =\n".$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 3 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) { + # Clear the \'s from around the submission + for (my $i =0;$i[$i]->[&RD_submission()] =~ s/(\'$|^\')//g; + } + return $dataset; + } +} -=cut -sub ProcessTopResourceMap { - my ($cache,$c)=@_; - my %hash; - my $fn=$ENV{'request.course.fn'}; - if(-e "$fn.db") { - my $tieTries=0; - while($tieTries < 3) { - if($c->aborted()) { - return; - } - if(tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) { - last; - } - $tieTries++; - sleep 1; - } - if($tieTries >= 3) { - return 'Coursemap undefined.'; +sub RDs_awarddetail { return 3; } +sub RDs_submission { return 2; } +sub RDs_timestamp { return 1; } +sub RDs_tries { return 0; } +sub RDs_awarded { return 4; } +sub RDs_response_eval { return 5; } +sub RDs_response_eval_2 { return 6; } +sub RDs_part_award { return 7; } + +sub get_response_data_by_student { + my ($student,$symb,$response,$courseid) = @_; + return undef if (! defined($symb) || + ! defined($response)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + &setup_table_names($courseid); + my $symb_id = &get_symb_id($symb); + my $response_id = &get_part_id($response); + # + my $student_id = &get_student_id($student->{'username'}, + $student->{'domain'}); + # + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + my $request = 'SELECT '. + 'c.tries, b.timestamp, a.submission, a.awarddetail, c.awarded, '. + 'a.response_specific_value, a.response_specific_value_2, c.award '. + 'FROM '.$fulldump_response_table.' AS a '. + 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '. + 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '. + 'a.transaction = b.transaction '. + 'LEFT JOIN '.$fulldump_part_table.' AS c '. + 'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '. + 'a.part_id=c.part_id AND a.transaction = c.transaction '. + 'LEFT JOIN '.$student_table.' AS d '. + 'ON a.student_id=d.student_id '. + 'LEFT JOIN '.$performance_table.' AS e '. + 'ON a.symb_id=e.symb_id AND a.part_id=e.part_id AND '. + 'a.student_id=e.student_id AND c.tries=e.tries '. + 'WHERE '. + 'a.symb_id='.$symb_id.' AND a.response_id='.$response_id. + ' AND a.student_id='.$student_id.' ORDER BY b.timestamp'; +# &Apache::lonnet::logthis("request =\n".$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 4 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) { + # Clear the \'s from around the submission + for (my $i =0;$i[$i]->[&RDs_submission] =~ s/(\'$|^\')//g; } - } else { - return 'Can not open Coursemap.'; + return $dataset; } + return undef; # error occurred +} + +sub RT_student_id { return 0; } +sub RT_awarded { return 1; } +sub RT_tries { return 2; } +sub RT_timestamp { return 3; } + +sub get_response_time_data { + my ($sections,$groups,$enrollment,$symb,$part,$courseid) = @_; + return undef if (! defined($symb) || + ! defined($part)); + $courseid = $env{'request.course.id'} if (! defined($courseid)); + # + &setup_table_names($courseid); + my $symb_id = &get_symb_id($symb); + if (! defined($symb_id)) { + &Apache::lonnet::logthis('Unable to find symb for '.$symb.' in '.$courseid); + return undef; + } + my $part_id = &get_part_id($part); + if (! defined($part_id)) { + &Apache::lonnet::logthis('Unable to find id for '.$part.' in '.$courseid); + return undef; + } + # + my $dbh = &Apache::lonmysql::get_dbh(); + return undef if (! defined($dbh)); + my ($student_requirements,$enrollment_requirements) = + &limit_by_section_and_status($sections,$enrollment,'d'); + my ($groups_join,$group_limits) = &limit_by_group($groups,'d','e','f'); + my $request = 'SELECT '. + 'a.student_id, a.awarded, a.tries, b.timestamp '. + 'FROM '.$fulldump_part_table.' AS a '. + 'LEFT JOIN '.$fulldump_timestamp_table.' AS b '. + 'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '. + 'a.transaction = b.transaction '. + 'LEFT JOIN '.$student_table.' as d '. + 'ON a.student_id=d.student_id '. + $groups_join; + my $limit = ' WHERE '. + 'a.symb_id='.$symb_id.' AND a.part_id='.$part_id; + if (defined($student_requirements)) { + $limit .= ' AND '.$student_requirements; + } + if (defined($enrollment_requirements)) { + $limit .= ' AND '.$enrollment_requirements; + } + if (defined($group_limits)) { + $limit .= ' AND '.$group_limits; + } + $request .= $limit.' ORDER BY b.timestamp'; +# &Apache::lonnet::logthis("request =\n".$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 5 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) { + return $dataset; + } + +} + +sub get_student_scores { + my ($sections,$groups,$Symbs,$enrollment,$courseid,$starttime,$endtime) = @_; + $courseid = $env{'request.course.id'} if (! defined($courseid)); + &setup_table_names($courseid); + my $dbh = &Apache::lonmysql::get_dbh(); + return (undef) if (! defined($dbh)); + my $tmptable = &temp_table_name($courseid,'temp_'.time); + my $request = 'DROP TABLE IF EXISTS '.$tmptable; +# &Apache::lonnet::logthis('request = '.$/.$request); + $dbh->do($request); + # + my $symb_requirements; + if (defined($Symbs) && @$Symbs) { + $symb_requirements = '('. + join(' OR ', map{ "(a.symb_id='".&get_symb_id($_->{'symb'}). + "' AND a.part_id='".&get_part_id($_->{'part'}). + "')" + } @$Symbs).')'; + } + # + my ($student_requirements,$enrollment_requirements) = + &limit_by_section_and_status($sections,$enrollment,'b'); + # + my ($groups_join,$group_limits) = &limit_by_group($groups,'b','d','e'); + my $time_requirements = &limit_by_start_end_time($starttime,$endtime,'a'); + ## + $request = 'CREATE TEMPORARY TABLE IF NOT EXISTS '.$tmptable. + ' SELECT a.student_id,SUM(a.awarded*c.weight) AS score FROM '. + $performance_table.' AS a '; + $request .= "LEFT JOIN ".$weight_table.' AS c ON a.symb_id=c.symb_id AND a.part_id=c.part_id '; + if (defined($student_requirements) || defined($enrollment_requirements)) { + $request .= ' LEFT JOIN '.$student_table.' AS b ON a.student_id=b.student_id '; + } + if (defined($groups_join)) { + $request .= $groups_join; + } + if (defined($symb_requirements) || + defined($student_requirements) || + defined($enrollment_requirements) || + defined($group_limits) ) { + $request .= ' WHERE '; + } + if (defined($symb_requirements)) { + $request .= $symb_requirements.' AND '; + } + if (defined($student_requirements)) { + $request .= $student_requirements.' AND '; + } + if (defined($enrollment_requirements)) { + $request .= $enrollment_requirements.' AND '; + } + if (defined($time_requirements)) { + $request .= $time_requirements.' AND '; + } + $request =~ s/ AND $//; # Strip of the trailing ' AND '. + $request .= ' GROUP BY a.student_id'; +# &Apache::lonnet::logthis("request = \n".$request); + my $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 6 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + $request = 'SELECT score,COUNT(*) FROM '.$tmptable.' GROUP BY score'; +# &Apache::lonnet::logthis("request = \n".$request); + $sth = $dbh->prepare($request); + $sth->execute(); + if ($dbh->err) { + &Apache::lonnet::logthis('error 7 = '.$dbh->errstr()); + &Apache::lonnet::logthis('prepared then executed '.$/.$request); + return undef; + } + my $dataset = $sth->fetchall_arrayref(); + return $dataset; +} + + + +sub setup_table_names { + my ($courseid) = @_; + if (! defined($courseid)) { + $courseid = $env{'request.course.id'}; + } + # + if (! defined($current_course) || $current_course ne $courseid) { + # Clear out variables + $have_read_part_table = 0; + undef(%ids_by_part); + undef(%parts_by_id); + $have_read_symb_table = 0; + undef(%ids_by_symb); + undef(%symbs_by_id); + $have_read_student_table = 0; + undef(%ids_by_student); + undef(%students_by_id); + $have_read_groupnames_table = 0; + undef(%ids_by_groupname); + # + $current_course = $courseid; + } + # + # Set up database names + my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid); + $symb_table = $base_id.'_'.'symb'; + $part_table = $base_id.'_'.'part'; + $student_table = $base_id.'_'.'student'; + $groupnames_table = $base_id.'_'.'groupnames'; + $students_groups_table = $base_id.'_'.'studentgroups'; + $performance_table = $base_id.'_'.'performance'; + $parameters_table = $base_id.'_'.'parameters'; + $fulldump_part_table = $base_id.'_'.'partdata'; + $fulldump_response_table = $base_id.'_'.'responsedata'; + $fulldump_timestamp_table = $base_id.'_'.'timestampdata'; + $weight_table = $base_id.'_'.'weight'; + # + @Tables = ( + $symb_table, + $part_table, + $student_table, + $groupnames_table, + $students_groups_table, + $performance_table, + $parameters_table, + $fulldump_part_table, + $fulldump_response_table, + $fulldump_timestamp_table, + $weight_table, + ); + return; +} + +sub temp_table_name { + my ($courseid,$affix) = @_; + my $base_id = 'md5_'.&Digest::MD5::md5_hex($courseid); + return $base_id.'_'.$affix; +} + + +} # End scope of table identifiers + + - # Initialize state machine. Set information pointing to top level map. - my (@sequences, @currentResource, @finishResource); - my ($currentSequence, $currentResourceID, $lastResourceID); - - $currentResourceID=$hash{'ids_/res/'.$ENV{'request.course.uri'}}; - push(@currentResource, $currentResourceID); - $lastResourceID=-1; - $currentSequence=-1; - my $topLevelSequenceNumber = $currentSequence; - - my %sequenceRecord; - while(1) { - if($c->aborted()) { - last; - } - # HANDLE NEW SEQUENCE! - #if page || sequence - if(defined($hash{'map_pc_'.$hash{'src_'.$currentResourceID}}) && - !defined($sequenceRecord{$currentResourceID})) { - $sequenceRecord{$currentResourceID}++; - push(@sequences, $currentSequence); - push(@currentResource, $currentResourceID); - push(@finishResource, $lastResourceID); - - $currentSequence=$hash{'map_pc_'.$hash{'src_'.$currentResourceID}}; - - # Mark sequence as containing problems. If it doesn't, then - # it will be removed when processing for this sequence is - # complete. This allows the problems in a sequence - # to be outputed before problems in the subsequences - if(!defined($cache->{'orderedSequences'})) { - $cache->{'orderedSequences'}=$currentSequence; +sub CL_SDOM { return 0; } +sub CL_SNAME { return 1; } +sub CL_END { return 2; } +sub CL_START { return 3; } +sub CL_ID { return 4; } +sub CL_SECTION { return 5; } +sub CL_FULLNAME { return 6; } +sub CL_STATUS { return 7; } +sub CL_TYPE { return 8; } +sub CL_LOCKEDTYPE { return 9; } +sub CL_CREDITS { return 10; } +sub CL_INSTSEC { return 11; } +sub CL_GROUP { return 12; } +sub CL_PERMANENTEMAIL { return 13; } +sub CL_ROLE { return 14; } +sub CL_EXTENT { return 15; } +sub CL_PHOTO { return 16; } +sub CL_THUMBNAIL { return 17; } +sub CL_AUTHORQUOTA { return 18; } +sub CL_AUTHORUSAGE { return 19; } + +sub get_classlist { + my ($cdom,$cnum) = @_; + my $cid = $cdom.'_'.$cnum; + if (!defined($cdom) || !defined($cnum)) { + $cid = $env{'request.course.id'}; + $cdom = $env{'course.'.$cid.'.domain'}; + $cnum = $env{'course.'.$cid.'.num'}; + } + my $now = time; + # + my %classlist=&Apache::lonnet::dump('classlist',$cdom,$cnum); + while (my ($student,$info) = each(%classlist)) { + if ($student =~ /^(con_lost|error|no_such_host)/i) { + &Apache::lonnet::logthis('get_classlist error for '.$cid.':'.$student); + return undef; + } + my ($sname,$sdom) = split(/:/,$student); + my @Values = split(/:/,$info); + my ($end,$start,$id,$section,$fullname,$type,$lockedtype,$credits,$instsec); + if (@Values > 2) { + ($end,$start,$id,$section,$fullname,$type,$lockedtype,$credits,$instsec) = @Values; + } else { # We have to get the data ourselves + ($end,$start) = @Values; + $section = &Apache::lonnet::getsection($sdom,$sname,$cid); + my %info=&Apache::lonnet::get('environment', + ['firstname','middlename', + 'lastname','generation','id'], + $sdom, $sname); + my ($tmp) = keys(%info); + if ($tmp =~/^(con_lost|error|no_such_host)/i) { + $fullname = 'not available'; + $id = 'not available'; + &Apache::lonnet::logthis('unable to retrieve environment '. + 'for '.$sname.':'.$sdom); } else { - $cache->{'orderedSequences'}.=':'.$currentSequence; + $fullname = &Apache::lonnet::format_name(@info{qw/firstname middlename lastname generation/},'lastname'); + $id = $info{'id'}; } + # Update the classlist with this students information + if ($fullname ne 'not available') { + my $enrolldata = join(':',$end,$start,$id,$section,$fullname); + my $reply=&Apache::lonnet::cput('classlist', + {$student => $enrolldata}, + $cdom,$cnum); + if ($reply !~ /^(ok|delayed)/) { + &Apache::lonnet::logthis('Unable to update classlist for '. + 'student '.$sname.':'.$sdom. + ' error:'.$reply); + } + } + } + my $status='Expired'; + if(((!$end) || $now < $end) && ((!$start) || ($now > $start))) { + $status='Active'; + } + if(($now < $start) && ((!$end) || $now < $end )) { + $status='Future'; + } + $classlist{$student} = + [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type, + $lockedtype,$credits,$instsec]; + } + if (wantarray()) { + return (\%classlist,['domain','username','end','start','id', + 'section','fullname','status','type', + 'lockedtype','credits','instsec']); + } else { + return \%classlist; + } +} - $lastResourceID=$hash{'map_finish_'. - $hash{'src_'.$currentResourceID}}; - $currentResourceID=$hash{'map_start_'. - $hash{'src_'.$currentResourceID}}; - - if(!($currentResourceID) || !($lastResourceID)) { - $currentSequence=pop(@sequences); - $currentResourceID=pop(@currentResource); - $lastResourceID=pop(@finishResource); - if($currentSequence eq $topLevelSequenceNumber) { - last; - } - } - next; - } +sub get_group_memberships { + my ($classlist,$keylist,$cdom,$cnum) = @_; - # Handle gradable resources: exams, problems, etc - $currentResourceID=~/(\d+)\.(\d+)/; - my $partA=$1; - my $partB=$2; - if($hash{'src_'.$currentResourceID}=~ - /\.(problem|exam|quiz|assess|survey|form)$/ && - $partA eq $currentSequence && - !defined($sequenceRecord{$currentSequence.':'. - $currentResourceID})) { - $sequenceRecord{$currentSequence.':'.$currentResourceID}++; - my $Problem = &Apache::lonnet::symbclean( - &Apache::lonnet::declutter($hash{'map_id_'.$partA}). - '___'.$partB.'___'. - &Apache::lonnet::declutter($hash{'src_'. - $currentResourceID})); - - $cache->{$currentResourceID.':problem'}=$Problem; - if(!defined($cache->{$currentSequence.':problems'})) { - $cache->{$currentSequence.':problems'}=$currentResourceID; - } else { - $cache->{$currentSequence.':problems'}.= - ':'.$currentResourceID; - } + return ({},{}) if (!ref($classlist) || !ref($keylist)); - my $meta=$hash{'src_'.$currentResourceID}; -# $cache->{$currentResourceID.':title'}= -# &Apache::lonnet::metdata($meta,'title'); - $cache->{$currentResourceID.':title'}= - $hash{'title_'.$currentResourceID}; - $cache->{$currentResourceID.':source'}= - $hash{'src_'.$currentResourceID}; - - # Get Parts for problem - my %beenHere; - foreach (split(/\,/,&Apache::lonnet::metadata($meta,'packages'))) { - if(/^\w+response_\d+.*/) { - my (undef, $partId, $responseId) = split(/_/,$_); - if($beenHere{'p:'.$partId} == 0) { - $beenHere{'p:'.$partId}++; - if(!defined($cache->{$currentSequence.':'. - $currentResourceID.':parts'})) { - $cache->{$currentSequence.':'.$currentResourceID. - ':parts'}=$partId; - } else { - $cache->{$currentSequence.':'.$currentResourceID. - ':parts'}.=':'.$partId; - } - } - if($beenHere{'r:'.$partId.':'.$responseId} == 0) { - $beenHere{'r:'.$partId.':'.$responseId}++; - if(!defined($cache->{$currentSequence.':'. - $currentResourceID.':'.$partId. - ':responseIDs'})) { - $cache->{$currentSequence.':'.$currentResourceID. - ':'.$partId.':responseIDs'}=$responseId; - } else { - $cache->{$currentSequence.':'.$currentResourceID. - ':'.$partId.':responseIDs'}.=':'. - $responseId; - } - } - if(/^optionresponse/ && - $beenHere{'o:'.$partId.':'.$currentResourceID} == 0) { - $beenHere{'o:'.$partId.$currentResourceID}++; - if(defined($cache->{'OptionResponses'})) { - $cache->{'OptionResponses'}.= ':::'. - $currentSequence.':'.$currentResourceID.':'. - $partId.':'.$responseId; + my $cid = $cdom.'_'.$cnum; + if (!defined($cdom) || !defined($cnum)) { + $cid = $env{'request.course.id'}; + $cdom = $env{'course.'.$cid.'.domain'}; + $cnum = $env{'course.'.$cid.'.num'}; + } + my (%classgroups,%studentgroups); + my $now = time; + my $access_end = $env{'course.'.$cid.'.default_enrollment_end_date'}; + my %curr_groups =&Apache::longroup::coursegroups($cdom,$cnum); + if (%curr_groups) { + my $grpindex = &CL_GROUP(); + my %groupmemberhash = + &Apache::lonnet::get_group_membership($cdom,$cnum); + foreach my $student (keys(%{$classlist})) { + %{$classgroups{$student}} = (); + my $hasgroup = 0; + foreach my $status ('previous','future','active','aftercourse') { + %{$classgroups{$student}{$status}} = (); + } + foreach my $group (keys(%curr_groups)) { + if (defined($groupmemberhash{$group.':'.$student})) { + my ($end,$start) = split(/:/,$groupmemberhash{$group.':'. + $student}); + if ($start == -1) { + next; + } else { + $studentgroups{$group} ++; + $hasgroup = 1; + if ($end && $end < $now) { + $classgroups{$student}{'previous'}{$group} = + $groupmemberhash{$group.':'.$student}; + if ($classlist->{$student}[&CL_STATUS()] eq 'Expired') { + if ($access_end && $access_end < $now) { + if ($access_end - $end < 86400) { + $classgroups{$student}{'aftercourse'}{$group} = $groupmemberhash{$group.':'.$student}; + } + } + } + } elsif ($now > $start) { + if (!$end || $end > $now) { + $classgroups{$student}{'active'}{$group} = + $groupmemberhash{$group.':'.$student}; + } } else { - $cache->{'OptionResponses'}= $currentSequence.':'. - $currentResourceID.':'. - $partId.':'.$responseId; + $classgroups{$student}{'future'}{$group} = + $groupmemberhash{$group.':'.$student}; } } } } - } - - # if resource == finish resource, then it is the end of a sequence/page - if($currentResourceID eq $lastResourceID) { - # pop off last resource of sequence - $currentResourceID=pop(@currentResource); - $lastResourceID=pop(@finishResource); - - if(defined($cache->{$currentSequence.':problems'})) { - # Capture sequence information here - $cache->{$currentSequence.':title'}= - $hash{'title_'.$currentResourceID}; - $cache->{$currentSequence.':source'}= - $hash{'src_'.$currentResourceID}; - - my $totalProblems=0; - foreach my $currentProblem (split(/\:/, - $cache->{$currentSequence. - ':problems'})) { - foreach (split(/\:/,$cache->{$currentSequence.':'. - $currentProblem. - ':parts'})) { - $totalProblems++; - } - } - my @titleLength=split(//,$cache->{$currentSequence. - ':title'}); - # $extra is 3 for problems correct and 3 for space - # between problems correct and problem output - my $extra = 6; - if(($totalProblems + $extra) > (scalar @titleLength)) { - $cache->{$currentSequence.':columnWidth'}= - $totalProblems + $extra; - } else { - $cache->{$currentSequence.':columnWidth'}= - (scalar @titleLength); - } - } else { - # Remove sequence from list, if it contains no problems to - # display. - $cache->{'orderedSequences'}=~s/$currentSequence//; - $cache->{'orderedSequences'}=~s/::/:/g; - $cache->{'orderedSequences'}=~s/^:|:$//g; + if (!$hasgroup) { + $studentgroups{'none'} ++; + } else { + $classlist->{$student}->[$grpindex] = join(',', + sort(keys(%{$classgroups{$student}{'active'}}))); } - - $currentSequence=pop(@sequences); - if($currentSequence eq $topLevelSequenceNumber) { - last; - } } - - # MOVE!!! - # move to next resource - unless(defined($hash{'to_'.$currentResourceID})) { - # big problem, need to handle. Next is probably wrong - my $errorMessage = 'Big problem in '; - $errorMessage .= 'loncoursedata::ProcessTopLevelMap.'; - $errorMessage .= ' bighash to_$currentResourceID not defined!'; - &Apache::lonnet::logthis($errorMessage); - last; - } - my @nextResources=(); - foreach (split(/\,/,$hash{'to_'.$currentResourceID})) { - if(!defined($sequenceRecord{$currentSequence.':'. - $hash{'goesto_'.$_}})) { - push(@nextResources, $hash{'goesto_'.$_}); + } + return (\%classgroups,\%studentgroups); +} + +sub get_students_groups { + my ($student,$enrollment_status,$classgroups) = @_; + my @studentsgroups = (); + if (ref($$classgroups{$student}{'active'}) eq 'HASH') { + push(@studentsgroups,keys(%{$$classgroups{$student}{'active'}})); + } + if ($enrollment_status eq 'Any') { + foreach my $status ('previous','future') { + if (ref($$classgroups{$student}{$status}) eq 'HASH') { + push(@studentsgroups,keys(%{$$classgroups{$student}{$status}})); } - } - push(@currentResource, @nextResources); - # Set the next resource to be processed - $currentResourceID=pop(@currentResource); + } + } else { + if (ref($$classgroups{$student}{'aftercourse'}) eq 'HASH') { + push(@studentsgroups,keys(%{$$classgroups{$student}{'aftercourse'}})); + } } + return @studentsgroups; +} - unless (untie(%hash)) { - &Apache::lonnet::logthis("WARNING: ". - "Could not untie coursemap $fn (browse)". - "."); - } - return 'OK'; -} +# ----- END HELPER FUNCTIONS -------------------------------------------- + +1; +__END__ + =pod -=item &ProcessClasslist() +=head1 NAME -Taking the class list dumped from &DownloadClasslist(), all the -students and their non-class information is processed using the -&ProcessStudentInformation() function. A date stamp is also recorded for -when the data was processed. - -Takes data downloaded for a student and breaks it up into managable pieces and -stored in cache data. The username, domain, class related date, PID, -full name, and section are all processed here. +Apache::loncoursedata -=over 4 +=head1 SYNOPSIS -Input: $cache, $classlist, $courseID, $ChartDB, $c +Set of functions that download and process student and course information. -$cache: A hash pointer to store the data +=head1 PACKAGES USED -$classlist: The hash of data collected about a student from -&DownloadClasslist(). The hash contains a list of students, a pointer -to a hash of student information for each student, and each students section -number. + Apache::lonnet + Apache::longroup + Time::HiRes + Apache::lonmysql + LONCAPA + Digest::MD5 + +=head1 DOWNLOAD INFORMATION -$courseID: The course ID +This section contains all the functions that get data from other servers +and/or itself. -$ChartDB: The name of the cache database file. -$c: The connection class used to determine if an abort has been sent to the -browser -Output: @names +=head1 LOCAL DATA CACHING SUBROUTINES -@names: An array of students whose information has been processed, and are to -be considered in an arbitrary order. +The local caching is done using MySQL. There is no fall-back implementation +if MySQL is not running. -=back +The programmers interface is to call &get_current_state() or some other +primary interface subroutine (described below). The internals of this +storage system are documented here. -=cut +There are six tables used to store student performance data (the results of +a dumpcurrent). Each of these tables is created in MySQL with a name of +$courseid_*****, where ***** is 'symb', 'part', or whatever is appropriate +for the table. The tables and their purposes are described below. -sub ProcessClasslist { - my ($cache,$classlist,$courseID,$c)=@_; - my @names=(); - - $cache->{'ClasslistTimeStamp'}=$classlist->{'lastDownloadTime'}; - if($classlist->{'UpToDate'} eq 'true') { - return split(/:::/,$cache->{'NamesOfStudents'});; - } +Some notes before we get started. - foreach my $name (keys(%$classlist)) { - if($name =~ /\:section/ || $name =~ /\:studentInformation/ || - $name eq '' || $name eq 'UpToDate' || $name eq 'lastDownloadTime') { - next; - } - if($c->aborted()) { - return (); - } - my $studentInformation = $classlist->{$name.':studentInformation'}, - my $sectionData = $classlist->{$name.':sections'}, - my $date = $classlist->{$name}, - my ($studentName,$studentDomain) = split(/\:/,$name); - - $cache->{$name.':username'}=$studentName; - $cache->{$name.':domain'}=$studentDomain; - # Initialize timestamp for student - if(!defined($cache->{$name.':lastDownloadTime'})) { - $cache->{$name.':lastDownloadTime'}='Not downloaded'; - $cache->{$name.':updateTime'}=' Not updated'; - } - - my $error = 0; - foreach(keys(%$studentInformation)) { - if(/^(con_lost|error|no_such_host)/i) { - $cache->{$name.':error'}= - 'Could not download student environment data.'; - $cache->{$name.':fullname'}=''; - $cache->{$name.':id'}=''; - $error = 1; - } - } - next if($error); - push(@names,$name); - $cache->{$name.':fullname'}=&ProcessFullName( - $studentInformation->{'lastname'}, - $studentInformation->{'generation'}, - $studentInformation->{'firstname'}, - $studentInformation->{'middlename'}); - $cache->{$name.':id'}=$studentInformation->{'id'}; - - my ($end, $start)=split(':',$date); - $courseID=~s/\_/\//g; - $courseID=~s/^(\w)/\/$1/; - - my $sec=''; - foreach my $key (keys (%$sectionData)) { - my $value = $sectionData->{$key}; - if ($key=~/^$courseID(?:\/)*(\w+)*\_st$/) { - my $tempsection=$1; - if($key eq $courseID.'_st') { - $tempsection=''; - } - my ($dummy,$roleend,$rolestart)=split(/\_/,$value); - if($roleend eq $end && $rolestart eq $start) { - $sec = $tempsection; - last; - } - } - } +Each table must have a PRIMARY KEY, which is a column or set of columns which +will serve to uniquely identify a row of data. NULL is not allowed! - my $status='Expired'; - if(((!$end) || time < $end) && ((!$start) || (time > $start))) { - $status='Active'; - } - $cache->{$name.':Status'}=$status; - $cache->{$name.':section'}=$sec; +INDEXes work best on integer data. - if($sec eq '' || !defined($sec) || $sec eq ' ') { - $sec = 'none'; - } - if(defined($cache->{'sectionList'})) { - if($cache->{'sectionList'} !~ /(^$sec:|^$sec$|:$sec$|:$sec:)/) { - $cache->{'sectionList'} .= ':'.$sec; - } - } else { - $cache->{'sectionList'} = $sec; - } - } +JOIN is used to combine data from many tables into one output. - $cache->{'ClasslistTimestamp'}=time; - $cache->{'NamesOfStudents'}=join(':::',@names); +lonmysql.pm is used for some of the interface, specifically the table creation +calls. The inserts are done in bulk by directly calling the database handler. +The SELECT ... JOIN statement used to retrieve the data does not have an +interface in lonmysql.pm and I shudder at the thought of writing one. - return @names; -} +=head2 Table Descriptions -=pod +=over 4 -=item &ProcessStudentData() +=head2 Tables used to store meta information -Takes the course data downloaded for a student in -&DownloadCourseInformation() and breaks it up into key value pairs -to be stored in the cached data. The keys are comprised of the -$username:$domain:$keyFromCourseDatabase. The student username:domain is -stored away signifying that the students information has been downloaded and -can be reused from cached data. +The following tables hold data required to keep track of the current status +of a students data in the tables or to look up the students data in the tables. =over 4 -Input: $cache, $courseData, $name +=item C<$symb_table> -$cache: A hash pointer to store data +The symb_table has two columns. The first is a 'symb_id' and the second +is the text name for the 'symb' (limited to 64k). The 'symb_id' is generated +automatically by MySQL so inserts should be done on this table with an +empty first element. This table has its PRIMARY KEY on the 'symb_id'. -$courseData: A hash pointer that points to the course data downloaded for a -student. +=item C<$part_table> -$name: username:domain +The part_table has two columns. The first is a 'part_id' and the second +is the text name for the 'part' (limited to 100 characters). The 'part_id' is +generated automatically by MySQL so inserts should be done on this table with +an empty first element. This table has its PRIMARY KEY on the 'part' (100 +characters) and a KEY on 'part_id'. -Output: None +=item C<$student_table> -*NOTE: There is no output, but an error message is stored away in the cache -data. This is checked in &FormatStudentData(). The key username:domain:error -will only exist if an error occured. The error is an error from -&DownloadCourseInformation(). +The student_table has 7 columns. The first is a 'student_id' assigned by +MySQL. The second is 'student' which is username:domain. The third through +fifth are 'section', 'status' (enrollment status), and 'classification' +(to be used in the future). The sixth and seventh ('updatetime' and +'fullupdatetime') contain the time of last update and full update of student +data. This table has its PRIMARY KEY on the 'student_id' column and is indexed +on 'student', 'section', and 'status'. -=back +=item C<$groupnames_table> -=cut +The groupnames_table has 2 columns. The first is a 'group_id' assigned by +MySQL. The second is 'groupname' which is the name of the group in the course. -sub ProcessStudentData { - my ($cache,$courseData,$name)=@_; +=item C<$students_groups_table> - if(!&CheckDateStampError($courseData, $cache, $name)) { - return; - } +The students_groups_table has 2 columns. The first is the 'student_id', and the +second is the 'group_id'. These two columns comprise the PRIMARY KEY for this +table, as an individual student may be affiliated with more than one group at +any time. This table is indexed on both student_id and group_id. - if(defined($cache->{$name.':keys'})) { - foreach (split(':::', $cache->{$name.':keys'})) { - delete $cache->{$name.':'.$_}; - } - } +=back - my %courseKeys; - # user name:domain was prepended earlier in DownloadCourseInformation - foreach (keys %$courseData) { - my $currentKey =~ s/^$name//; - $courseKeys{$currentKey}++; - $cache->{$_}=$courseData->{$_}; - } +=head2 Tables used to store current status data - $cache->{$name.':keys'} = join(':::', keys(%courseKeys)); +The following tables store data only about the students current status on +a problem, meaning only the data related to the last attempt on a problem. - return; -} +=over 4 -=pod +=item C<$performance_table> + +The performance_table has 9 columns. The first three are 'symb_id', +'student_id', and 'part_id'. These comprise the PRIMARY KEY for this table +and are directly related to the $symb_table, $student_table, and $part_table +described above. MySQL does better indexing on numeric items than text, +so we use these three "index tables". The remaining columns are +'solved', 'tries', 'awarded', 'award', 'awarddetail', and 'timestamp'. +These are either the MySQL type TINYTEXT or various integers ('tries' and +'timestamp'). This table has KEYs of 'student_id' and 'symb_id'. +For use of this table, see the functions described below. + +=item C<$parameters_table> + +The parameters_table holds the data that does not fit neatly into the +performance_table. The parameters table has four columns: 'symb_id', +'student_id', 'parameter', and 'value'. 'symb_id', 'student_id', and +'parameter' comprise the PRIMARY KEY for this table. 'parameter' is +limited to 255 characters. 'value' is limited to 64k characters. + +=back -=item &ExtractStudentData() +=head2 Tables used for storing historic data -HISTORY: This function originally existed in every statistics module, -and performed different tasks, the had some overlap. Due to the need -for the data from the different modules, they were combined into -a single function. - -This function now extracts all the necessary course data for a student -from what was downloaded from their homeserver. There is some extra -time overhead compared to the ProcessStudentInformation function, but -it would have had to occurred at some point anyways. This is now -typically called while downloading the data it will process. It is -the brother function to ProcessStudentInformation. +The following tables are used to store almost all of the transactions a student +has made on a homework problem. See loncapa/docs/homework/datastorage for +specific information about each of the parameters stored. =over 4 -Input: $input, $output, $data, $name +=item C<$fulldump_response_table> -$input: A hash that contains the input data to be processed +The response table holds data (documented in loncapa/docs/homework/datastorage) +associated with a particular response id which is stored when a student +attempts a problem. The following are the columns of the table, in order: +'symb_id','part_id','response_id','student_id','transaction','tries', +'awarddetail', 'response_specific', 'response_specific_value', +'response_specific_2', 'response_specific_value_2', and 'submission +(the text of the students submission). The primary key is based on the +first five columns listed above. + +=item C<$fulldump_part_table()> + +The part table holds data (documented in loncapa/docs/homework/datastorage) +associated with a particular part id which is stored when a student attempts +a problem. The following are the columns of the table, in order: +'symb_id','part_id','student_id','transaction','tries','award','awarded', +and 'previous'. The primary key is based on the first five columns listed +above. + +=item C<$fulldump_timestamp_table()> + +The timestamp table holds the timestamps of the transactions which are +stored in $fulldump_response_table and $fulldump_part_table. This data is +about both the response and part data. Columns: 'symb_id','student_id', +'transaction', and 'timestamp'. +The primary key is based on the first 3 columns. + +=item C<$weight_table()> + +The weight table holds the weight for the problems used in the class. +Whereas the weight of a problem can vary by section and student the data +here is applied to the class as a whole. +Columns: 'symb_id','part_id','response_id','weight'. + +=back -$output: A hash to contain the processed data -$data: A hash containing the information on what is to be -processed and how (basically). +=head1 IMPORTANT SUBROUTINES -$name: username:domain +Here is a brief overview of the subroutines which are likely to be of +interest: + +=over 4 -The input is slightly different here, but is quite simple. -It is currently used where the $input, $output, and $data -can and are often the same hashes, but they do not need -to be. +=item C<&get_current_state()> -Output: None +programmers interface. -*NOTE: There is no output, but an error message is stored away in the cache -data. This is checked in &FormatStudentData(). The key username:domain:error -will only exist if an error occured. The error is an error from -&DownloadCourseInformation(). +=item C<&init_dbs()> + +table creation + +=item C<&update_student_data()> + +data storage calls + +=item C<&get_student_data_from_performance_cache()> + +data retrieval =back -=cut +=head1 OTHER SUBROUTINES -sub ExtractStudentData { - my ($input, $output, $data, $name)=@_; +=over 4 - if(!&CheckDateStampError($input, $data, $name)) { - return; - } +=item C<&make_into_hash($values)> - my %allkeys; - if(defined($output->{$name.':keys'})) { - foreach (split(':::', $output->{$name.':keys'})) { - delete $output->{$name.':'.$_}; - } - } +Returns a reference to a hash as described by $values. $values is +assumed to be the result of + join(':',map {&escape($_)} %orighash); - my ($username,$domain)=split(':',$name); +This is a helper function for get_current_state. - my $Version; - my $problemsCorrect = 0; - my $totalProblems = 0; - my $problemsSolved = 0; - my $numberOfParts = 0; - my $totalAwarded = 0; - foreach my $sequence (split(':', $data->{'orderedSequences'})) { - foreach my $problemID (split(':', $data->{$sequence.':problems'})) { - my $problem = $data->{$problemID.':problem'}; - my $LatestVersion = $input->{$name.':version:'.$problem}; - - # Output dashes for all the parts of this problem if there - # is no version information about the current problem. - if(!$LatestVersion) { - foreach my $part (split(/\:/,$data->{$sequence.':'. - $problemID. - ':parts'})) { - $output->{$name.':'.$problemID.':'.$part.':tries'} = 0; - $output->{$name.':'.$problemID.':'.$part.':awarded'} = 0; - $output->{$name.':'.$problemID.':'.$part.':code'} = ' '; - $allkeys{$name.':'.$problemID.':'.$part.':tries'}++; - $allkeys{$name.':'.$problemID.':'.$part.':awarded'}++; - $allkeys{$name.':'.$problemID.':'.$part.':code'}++; - $totalProblems++; - } - $output->{$name.':'.$problemID.':NoVersion'} = 'true'; - $allkeys{$name.':'.$problemID.':NoVersion'}++; - next; - } +=item C<&init_dbs()> - my %partData=undef; - # Initialize part data, display skips correctly - # Skip refers to when a student made no submissions on that - # part/problem. - foreach my $part (split(/\:/,$data->{$sequence.':'. - $problemID. - ':parts'})) { - $partData{$part.':tries'}=0; - $partData{$part.':code'}=' '; - $partData{$part.':awarded'}=0; - $partData{$part.':timestamp'}=0; - foreach my $response (split(':', $data->{$sequence.':'. - $problemID.':'. - $part.':responseIDs'})) { - $partData{$part.':'.$response.':submission'}=''; - } - } +Input: course id - # Looping through all the versions of each part, starting with the - # oldest version. Basically, it gets the most recent - # set of grade data for each part. - my @submissions = (); - for(my $Version=1; $Version<=$LatestVersion; $Version++) { - foreach my $part (split(/\:/,$data->{$sequence.':'. - $problemID. - ':parts'})) { - - if(!defined($input->{"$name:$Version:$problem". - ":resource.$part.solved"})) { - # No grade for this submission, so skip - next; - } +Output: 0 on success, positive integer on error - my $tries=0; - my $code=' '; - my $awarded=0; - - $tries = $input->{$name.':'.$Version.':'.$problem. - ':resource.'.$part.'.tries'}; - $awarded = $input->{$name.':'.$Version.':'.$problem. - ':resource.'.$part.'.awarded'}; - - $partData{$part.':awarded'}=($awarded) ? $awarded : 0; - $partData{$part.':tries'}=($tries) ? $tries : 0; - - $partData{$part.':timestamp'}=$input->{$name.':'.$Version.':'. - $problem. - ':timestamp'}; - if(!$input->{$name.':'.$Version.':'.$problem.':resource.'.$part. - '.previous'}) { - foreach my $response (split(':', - $data->{$sequence.':'. - $problemID.':'. - $part.':responseIDs'})) { - @submissions=($input->{$name.':'.$Version.':'. - $problem. - ':resource.'.$part.'.'. - $response.'.submission'}, - @submissions); - } - } +This routine issues the calls to lonmysql to create the tables used to +store student data. - my $val = $input->{$name.':'.$Version.':'.$problem. - ':resource.'.$part.'.solved'}; - if ($val eq 'correct_by_student') {$code = '*';} - elsif ($val eq 'correct_by_override') {$code = '+';} - elsif ($val eq 'incorrect_attempted') {$code = '.';} - elsif ($val eq 'incorrect_by_override'){$code = '-';} - elsif ($val eq 'excused') {$code = 'x';} - elsif ($val eq 'ungraded_attempted') {$code = '#';} - else {$code = ' ';} - $partData{$part.':code'}=$code; - } - } +item C<&delete_caches()> - foreach my $part (split(/\:/,$data->{$sequence.':'.$problemID. - ':parts'})) { - $output->{$name.':'.$problemID.':'.$part.':wrong'} = - $partData{$part.':tries'}; - $allkeys{$name.':'.$problemID.':'.$part.':wrong'}++; - - if($partData{$part.':code'} eq '*') { - $output->{$name.':'.$problemID.':'.$part.':wrong'}--; - $problemsCorrect++; - } elsif($partData{$part.':code'} eq '+') { - $output->{$name.':'.$problemID.':'.$part.':wrong'}--; - $problemsCorrect++; - } +This routine drops all the tables associated with a course from the +MySQL database. - $output->{$name.':'.$problemID.':'.$part.':tries'} = - $partData{$part.':tries'}; - $output->{$name.':'.$problemID.':'.$part.':code'} = - $partData{$part.':code'}; - $output->{$name.':'.$problemID.':'.$part.':awarded'} = - $partData{$part.':awarded'}; - $allkeys{$name.':'.$problemID.':'.$part.':tries'}++; - $allkeys{$name.':'.$problemID.':'.$part.':code'}++; - $allkeys{$name.':'.$problemID.':'.$part.':awarded'}++; - - $totalAwarded += $partData{$part.':awarded'}; - $output->{$name.':'.$problemID.':'.$part.':timestamp'} = - $partData{$part.':timestamp'}; - $allkeys{$name.':'.$problemID.':'.$part.':timestamp'}++; - - foreach my $response (split(':', $data->{$sequence.':'. - $problemID.':'. - $part.':responseIDs'})) { - $output->{$name.':'.$problemID.':'.$part.':'.$response. - ':submission'}=join(':::',@submissions); - $allkeys{$name.':'.$problemID.':'.$part.':'.$response. - ':submission'}++; - } +Input: course id (optional, determined by environment if omitted) - if($partData{$part.':code'} ne 'x') { - $totalProblems++; - } - } - } +Returns: nothing - $output->{$name.':'.$sequence.':problemsCorrect'} = $problemsCorrect; - $allkeys{$name.':'.$sequence.':problemsCorrect'}++; - $problemsSolved += $problemsCorrect; - $problemsCorrect=0; - } +=item C<&get_part_id()> - $output->{$name.':problemsSolved'} = $problemsSolved; - $output->{$name.':totalProblems'} = $totalProblems; - $output->{$name.':totalAwarded'} = $totalAwarded; - $allkeys{$name.':problemsSolved'}++; - $allkeys{$name.':totalProblems'}++; - $allkeys{$name.':totalAwarded'}++; +Get the MySQL id of a problem part string. - $output->{$name.':keys'} = join(':::', keys(%allkeys)); +Input: $part - return; -} +Output: undef on error, integer $part_id on success. -sub LoadDiscussion { - my ($courseID)=@_; - my %Discuss=(); - my %contrib=&Apache::lonnet::dump( - $courseID, - $ENV{'course.'.$courseID.'.domain'}, - $ENV{'course.'.$courseID.'.num'}); - - #my %contrib=&DownloadCourseInformation($name, $courseID, 0); - - foreach my $temp(keys %contrib) { - if ($temp=~/^version/) { - my $ver=$contrib{$temp}; - my ($dummy,$prb)=split(':',$temp); - for (my $idx=1; $idx<=$ver; $idx++ ) { - my $name=$contrib{"$idx:$prb:sendername"}; - $Discuss{"$name:$prb"}=$idx; - } - } - } +=item C<&get_part()> - return \%Discuss; -} +Get the string describing a part from the MySQL id of the problem part. -# ----- END PROCESSING FUNCTIONS --------------------------------------- +Input: $part_id -=pod +Output: undef on error, $part string on success. -=head1 HELPER FUNCTIONS +=item C<&get_symb_id()> -These are just a couple of functions do various odd and end -jobs. There was also a couple of bulk functions added. These are -&DownloadStudentCourseData(), &DownloadStudentCourseDataSeparate(), and -&CheckForResidualDownload(). These functions now act as the interface -for downloading student course data. The statistical modules should -no longer make the calls to dump and download and process etc. They -make calls to these bulk functions to get their data. +Get the MySQL id of a symb. -=cut +Input: $symb -# ----- HELPER FUNCTIONS ----------------------------------------------- +Output: undef on error, integer $symb_id on success. -sub CheckDateStampError { - my ($courseData, $cache, $name)=@_; - if($courseData->{$name.':UpToDate'} eq 'true') { - $cache->{$name.':lastDownloadTime'} = - $courseData->{$name.':lastDownloadTime'}; - if($courseData->{$name.':lastDownloadTime'} eq 'Not downloaded') { - $cache->{$name.':updateTime'} = ' Not updated'; - } else { - $cache->{$name.':updateTime'}= - localtime($courseData->{$name.':lastDownloadTime'}); - } - return 0; - } - - $cache->{$name.':lastDownloadTime'}=$courseData->{$name.':lastDownloadTime'}; - if($courseData->{$name.':lastDownloadTime'} eq 'Not downloaded') { - $cache->{$name.':updateTime'} = ' Not updated'; - } else { - $cache->{$name.':updateTime'}= - localtime($courseData->{$name.':lastDownloadTime'}); - } +=item C<&get_symb()> - if(defined($courseData->{$name.':error'})) { - $cache->{$name.':error'}=$courseData->{$name.':error'}; - return 0; - } +Get the symb associated with a MySQL symb_id. - return 1; -} +Input: $symb_id -=pod +Output: undef on error, $symb on success. -=item &ProcessFullName() +=item C<&get_student_id()> -Takes lastname, generation, firstname, and middlename (or some partial -set of this data) and returns the full name version as a string. Format -is Lastname generation, firstname middlename or a subset of this. +Get the MySQL id of a student. -=cut +Input: $sname, $dom -sub ProcessFullName { - my ($lastname, $generation, $firstname, $middlename)=@_; - my $Str = ''; - - if($lastname ne '') { - $Str .= $lastname.' '; - if($generation ne '') { - $Str .= $generation; - } else { - chop($Str); - } - $Str .= ', '; - if($firstname ne '') { - $Str .= $firstname.' '; - } - if($middlename ne '') { - $Str .= $middlename; - } else { - chop($Str); - if($firstname eq '') { - chop($Str); - } - } - } else { - if($firstname ne '') { - $Str .= $firstname.' '; - } - if($middlename ne '') { - $Str .= $middlename.' '; - } - if($generation ne '') { - $Str .= $generation; - } else { - chop($Str); - } - } +Output: undef on error, integer $student_id on success. - return $Str; -} +=item C<&get_student()> -=pod +Get student username:domain associated with the MySQL student_id. + +Input: $student_id + +Output: undef on error, string $student (username:domain) on success. + +=item C<&clear_internal_caches()> + +Causes the internal caches used in get_student_id, get_student, +get_symb_id, get_symb, get_part_id, and get_part to be undef'd. + +Needs to be called before the first operation with the MySQL database +for a given Apache request. + +=item C<&update_full_student_data($sname,$sdom,$courseid)> + +Does a lonnet::dump on a student to populate the courses tables. + +Input: $sname, $sdom, $courseid + +Output: $returnstatus + +$returnstatus is a string describing any errors that occurred. 'okay' is the +default. + +This subroutine loads a students data using lonnet::dump and inserts +it into the MySQL database. The inserts are done on three tables, +$fulldump_response_table, $fulldump_part_table, and $fulldump_timestamp_table. +The INSERT calls are made directly by this subroutine, not through lonmysql +because we do a 'bulk'insert which takes advantage of MySQLs non-SQL +compliant INSERT command to insert multiple rows at a time. +If anything has gone wrong during this process, $returnstatus is updated with +a description of the error. + +Once the "fulldump" tables are updated, the tables used for chart and +spreadsheet (which hold only the current state of the student on their +homework, not historical data) are updated. If all updates have occurred +successfully, $student_table is updated to reflect the time of the update. + +Notice we do not insert the data and immediately query it. This means it +is possible for there to be data returned this first time that is not +available the second time. CYA. + + +=item C<&update_student_data()> + +Input: $sname, $sdom, $courseid + +Output: $returnstatus, \%student_data + +$returnstatus is a string describing any errors that occurred. 'okay' is the +default. +\%student_data is the data returned by a call to lonnet::currentdump. + +This subroutine loads a students data using lonnet::currentdump and inserts +it into the MySQL database. The inserts are done on two tables, +$performance_table and $parameters_table. $parameters_table holds the data +that is not included in $performance_table. See the description of +$performance_table elsewhere in this file. The INSERT calls are made +directly by this subroutine, not through lonmysql because we do a 'bulk' +insert which takes advantage of MySQLs non-SQL compliant INSERT command to +insert multiple rows at a time. If anything has gone wrong during this +process, $returnstatus is updated with a description of the error and +\%student_data is returned. + +Notice we do not insert the data and immediately query it. This means it +is possible for there to be data returned this first time that is not +available the second time. CYA. + +=item &ensure_tables_are_set_up($courseid) + +Checks to be sure the MySQL tables for the given class are set up. +If $courseid is omitted it will be obtained from the environment. + +Returns nothing on success and 'error' on failure + + +=item C<&ensure_current_data()> + +Input: $sname, $sdom, $courseid + +Output: $status, $data + +This routine ensures the data for a given student is up to date. +The $student_table is queried to determine the time of the last update. +If the students data is out of date, &update_student_data() is called. +The return values from the call to &update_student_data() are returned. + +=item C<&ensure_current_full_data($sname,$sdom,$courseid)> -=item &TestCacheData() +Input: $sname, $sdom, $courseid -Determine if the cache database can be accessed with a tie. It waits up to -ten seconds before returning failure. This function exists to help with -the problems with stopping the data download. When an abort occurs and the -user quickly presses a form button and httpd child is created. This -child needs to wait for the other to finish (hopefully within ten seconds). +Output: $status + +This routine ensures the fulldata (the data from a lonnet::dump, not a +lonnet::currentdump) for a given student is up to date. +The $student_table is queried to determine the time of the last update. +If the students fulldata is out of date, &update_full_student_data() is +called. + +The return value from the call to &update_full_student_data() is returned. + +=item C<&get_student_data_from_performance_cache()> + +Input: $sname, $sdom, $symb, $courseid + +Output: hash reference containing the data for the given student. +If $symb is undef, all the students data is returned. + +This routine is the heart of the local caching system. See the description +of $performance_table, $symb_table, $student_table, and $part_table. The +main task is building the MySQL request. The tables appear in the request +in the order in which they should be parsed by MySQL. When searching +on a student the $student_table is used to locate the 'student_id'. All +rows in $performance_table which have a matching 'student_id' are returned, +with data from $part_table and $symb_table which match the entries in +$performance_table, 'part_id' and 'symb_id'. When searching on a symb, +the $symb_table is processed first, with matching rows grabbed from +$performance_table and filled in from $part_table and $student_table in +that order. + +Running 'EXPLAIN ' on the 'SELECT' statements generated can be quite +interesting, especially if you play with the order the tables are listed. + + +=item C<&get_current_state()> + +Input: $sname,$sdom,$symb,$courseid + +Output: Described below + +Retrieve the current status of a students performance. $sname and +$sdom are the only required parameters. If $symb is undef the results +of an &Apache::lonnet::currentdump() will be returned. +If $courseid is undef it will be retrieved from the environment. + +The return structure is based on &Apache::lonnet::currentdump. If +$symb is unspecified, all the students data is returned in a hash of +the form: +( + symb1 => { param1 => value1, param2 => value2 ... }, + symb2 => { param1 => value1, param2 => value2 ... }, +) + +If $symb is specified, a hash of +( + param1 => value1, + param2 => value2, +) +is returned. + +If no data is found for $symb, or if the student has no performance data, +an empty list is returned. + +=item C<&get_problem_statistics()> + +Gather data on a given problem. The database is assumed to be +populated and all local caching variables are assumed to be set +properly. This means you need to call &ensure_current_data for +the students you are concerned with prior to calling this routine. + +Inputs: $Sections, Groups, $status, $symb, $part, $courseid, $starttime, + $endtime =over 4 -Input: $ChartDB +=item $Sections Array ref containing section names for students. +'all' is allowed to be the first (and only) item in the array. + +=item $Groups Array ref containing group names for students. +'all' is allowed to be the first (and only) item in the array. -$ChartDB: The name of the cache database to be opened +=item $status String describing the status of students -Output: -1, 0, 1 +=item $symb is the symb for the problem. --1: Could not tie database - 0: Use cached data - 1: New cache database created, use that. +=item $part is the part id you need statistics for + +=item $courseid is the course id, of course! + +=item $starttime and $endtime are unix times which to use to limit +the statistical data. =back -=cut +Outputs: See the code for up to date information. A hash reference is +returned. The hash has the following keys defined: -sub TestCacheData { - my ($ChartDB,$isRecalculate,$totalDelay)=@_; - my $isCached=-1; - my %testData; - my $tieTries=0; +=over 4 - if(!defined($totalDelay)) { - $totalDelay = 10; - } +=item * num_students - if ((-e "$ChartDB") && (!$isRecalculate)) { - $isCached = 1; - } else { - $isCached = 0; - } +The number of students attempting the problem + +=item tries - while($tieTries < $totalDelay) { - my $result=0; - if($isCached) { - $result=tie(%testData,'GDBM_File',$ChartDB,&GDBM_READER(),0640); - } else { - $result=tie(%testData,'GDBM_File',$ChartDB,&GDBM_NEWDB(),0640); - } - if($result) { - last; - } - $tieTries++; - sleep 1; - } - if($tieTries >= $totalDelay) { - return -1; - } +The total number of tries for the students + +=item max_tries - untie(%testData); +The maximum number of tries taken + +=item mean_tries - return $isCached; -} +The average number of tries + +=item num_solved T -sub DownloadStudentCourseData { - my ($students,$checkDate,$cacheDB,$extract,$status,$courseID,$r,$c)=@_; +he number of students able to solve the problem + +=item num_override - my $title = 'LON-CAPA Statistics'; - my $heading = 'Download and Process Course Data'; - my $studentCount = scalar(@$students); +The number of students whose answer is 'correct_by_override' + +=item deg_of_diff - my $WhatIWant; - $WhatIWant = '(^version:|'; - $WhatIWant .= '^\d+:.+?:(resource\.\d+\.'; - $WhatIWant .= '(solved|tries|previous|awarded|(\d+\.submission))\s*$'; - $WhatIWant .= '|timestamp)'; - $WhatIWant .= ')'; -# $WhatIWant = '.'; +The degree of difficulty of the problem + +=item std_tries - if($status eq 'true') { - &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading); - } +The standard deviation of the number of tries + +=item skew_tries - my $displayString; - my $count=0; - foreach (@$students) { - my %cache; +The skew of the number of tries - if($c->aborted()) { return 'Aborted'; } +=item per_wrong - if($status eq 'true') { - $count++; - my $displayString = $count.'/'.$studentCount.': '.$_; - &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r); - } +The number of students attempting the problem who were not +able to answer it correctly. - my $downloadTime='Not downloaded'; - if($checkDate eq 'true' && - tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { - $downloadTime = $cache{$_.':lastDownloadTime'}; - untie(%cache); - } +=back - if($c->aborted()) { return 'Aborted'; } +=item C<&populate_weight_table()> - #if($downloadTime ne 'Not downloaded') { - # next; - #} - my $courseData = - &DownloadCourseInformation($_, $courseID, $downloadTime, - $WhatIWant); - if(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { - foreach my $key (keys(%$courseData)) { - if($key =~ /^(con_lost|error|no_such_host)/i) { - $courseData->{$_.':error'} = 'No course data for '.$_; - last; - } - } - if($extract eq 'true') { - &ExtractStudentData($courseData, \%cache, \%cache, $_); - } else { - &ProcessStudentData(\%cache, $courseData, $_); - } - untie(%cache); - } else { - next; - } - } - if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); } +=item C<&limit_by_start_end_times()> - return 'OK'; -} +Build SQL WHERE condition which limits the data collected by the start +and end times provided -sub DownloadStudentCourseDataSeparate { - my ($students,$checkDate,$cacheDB,$extract,$status,$courseID,$r,$c)=@_; - my $residualFile = '/home/httpd/perl/tmp/'.$courseID.'DownloadFile.db'; - my $title = 'LON-CAPA Statistics'; - my $heading = 'Download Course Data'; +Inputs: $starttime, $endtime, $table - my $WhatIWant; - $WhatIWant = '(^version:|'; - $WhatIWant .= '^\d+:.+?:(resource\.\d+\.'; - $WhatIWant .= '(solved|tries|previous|awarded|(\d+\.submission))\s*$'; - $WhatIWant .= '|timestamp)'; - $WhatIWant .= ')'; +Returns: $time_limits - &CheckForResidualDownload($courseID, $cacheDB, $students, $c); - my $studentCount = scalar(@$students); - if($status eq 'true') { - &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading); - } - my $count=0; - my $displayString=''; - foreach (@$students) { - if($c->aborted()) { - return 'Aborted'; - } +=item C<&limit_by_section_and_status()C> - if($status eq 'true') { - $count++; - $displayString = $count.'/'.$studentCount.': '.$_; - &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r); - } +Build SQL WHERE condition which limits the data collected by section and +student status. - my %cache; - my $downloadTime='Not downloaded'; - if($checkDate eq 'true' && - tie(%cache,'GDBM_File',$cacheDB,&GDBM_READER(),0640)) { - $downloadTime = $cache{$_.':lastDownloadTime'}; - untie(%cache); - } +Inputs: $Sections (array ref) + $enrollment (string: 'any', 'expired', 'active') + $tablename The name of the table that holds the student data - if($c->aborted()) { - return 'Aborted'; - } +Returns: $student_requirements,$enrollment_requirements - #if($downloadTime eq 'Not downloaded') { - my $error = 0; - my $courseData = - &DownloadCourseInformation($_, $courseID, $downloadTime, - $WhatIWant); - my %downloadData; - unless(tie(%downloadData,'GDBM_File',$residualFile, - &GDBM_WRCREAT(),0640)) { - return 'Failed to tie temporary download hash.'; - } - foreach my $key (keys(%$courseData)) { - $downloadData{$key} = $courseData->{$key}; - if($key =~ /^(con_lost|error|no_such_host)/i) { - $error = 1; - last; - } - } - if($error) { - foreach my $deleteKey (keys(%$courseData)) { - delete $downloadData{$deleteKey}; - } - $downloadData{$_.':error'} = 'No course data for '.$_; - } - untie(%downloadData); - #} - } - if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); } +=item C<&limit_by_group()> + +Build SQL LEFT JOIN statement to include students_groups and groupnames tables and SQL WHERE condition which limits the data collected by group. + +Inputs: $Groups (array ref) + $stutable The name of the table which holds the student data. + $grptable The name of the table which maps group_id to groupname. + $stugrptab The name of the table which holds student group affiliations. +Returns: $groups_join,$group_limits + $groups_join JOIN part of SQL statement (to include group related tables) + $group_limits SQL WHERE condition limiting to requested groups - return &CheckForResidualDownload($cacheDB, 'true', 'true', - $courseID, $r, $c); -} +=item C -sub CheckForResidualDownload { - my ($cacheDB,$extract,$status,$courseID,$r,$c)=@_; +Inputs: + $resources: array ref of hash ref. Each hash ref needs key 'symb'. + $Sections: array ref of sections to include, + $Groups: array ref of groups to include. + $enrollment: string, + $courseid (may be omitted) + $starttime (may be omitted) + $endtime (may be omitted) + $has_award_for (may be omitted) - my $residualFile = '/home/httpd/perl/tmp/'.$courseID.'DownloadFile.db'; - if(!-e $residualFile) { - return 'OK'; - } +Returns; An array of arrays. The sub arrays contain a student name and +their score on the resources. $starttime and $endtime constrain the +list to awards obtained during the given time limits. $has_score_on +constrains the list to those students who at least attempted the +resource identified by the given symb, which is used to filter out +such students for statistics that would be adversely affected by such +students. - my %downloadData; - my %cache; - unless(tie(%downloadData,'GDBM_File',$residualFile,&GDBM_READER(),0640)) { - return 'Can not tie database for check for residual download: tempDB'; - } - unless(tie(%cache,'GDBM_File',$cacheDB,&GDBM_WRCREAT(),0640)) { - untie(%downloadData); - return 'Can not tie database for check for residual download: cacheDB'; - } +=item C<&get_sum_of_scores> - my @students=(); - my %checkStudent; - my $key; - while(($key, undef) = each %downloadData) { - my @temp = split(':', $key); - my $student = $temp[0].':'.$temp[1]; - if(!defined($checkStudent{$student})) { - $checkStudent{$student}++; - push(@students, $student); - } - } +Inputs: $resource (hash ref, needs {'symb'} key), +$part, (the part id), +$students (array ref, contents of array are scalars holding 'sname:sdom'), +$courseid - my $heading = 'Process Course Data'; - my $title = 'LON-CAPA Statistics'; - my $studentCount = scalar(@students); - if($status eq 'true') { - &Apache::lonhtmlcommon::Create_PrgWin($r, $title, $heading); - } +Returns: the sum of the score on the problem part over the students and the + maximum possible value for the sum (taken from the weight table). + - my $count=1; - foreach my $name (@students) { - last if($c->aborted()); +=item C<&score_stats()> - if($status eq 'true') { - my $displayString = $count.'/'.$studentCount.': '.$name; - &Apache::lonhtmlcommon::Update_PrgWin($displayString, $r); - } +Inputs: $Sections, $enrollment, $symbs, $starttime, + $endtime, $courseid - if($extract eq 'true') { - &ExtractStudentData(\%downloadData, \%cache, \%cache, $name); - } else { - &ProcessStudentData(\%cache, \%downloadData, $name); - } - $count++; - } +$Sections, $enrollment, $starttime, $endtime, and $courseid are the same as +elsewhere in this module. +$symbs is an array ref of symbs - if($status eq 'true') { &Apache::lonhtmlcommon::Close_PrgWin($r); } +Returns: minimum, maximum, mean, s.d., number of students, and maximum + possible of student scores on the given resources - untie(%cache); - untie(%downloadData); +=item C<&count_stats()> - if(!$c->aborted()) { - my @files = ($residualFile); - unlink(@files); - } +Inputs: $Sections, $Groups, $enrollment, $symbs, $starttime, + $endtime, $courseid - return 'OK'; -} +$Sections, $Groups $enrollment, $starttime, $endtime, and $courseid are the +same as elsewhere in this module. +$symbs is an array ref of symbs + +Returns: minimum, maximum, mean, s.d., and number of students + of the number of items correct on the given resources + +=item C + +=item C<&get_student_scores($Sections,$Groups,$Symbs,$enrollment,$courseid)> + +=item C<&setup_table_names()> + +input: course id + +output: none + +=back + +=head3 End of Local Data Caching Subroutines + +=head3 Classlist Subroutines + +=over + +=item &get_classlist(); + +Retrieve the classist of a given class or of the current class. Student +information is returned from the classlist.db file and, if needed, +from the students environment. + +Optional arguments are $cdom, and $cnum (course domain, +and course number, respectively). If either is ommitted the course +will be taken from the current environment ($env{'request.course.id'}, +$env{'course.'.$cid.'.domain'}, and $env{'course.'.$cid.'.num'}). + +Returns a reference to a hash which contains: + keys '$sname:$sdom' + values [$sdom,$sname,$end,$start,$id,$section,$fullname,$status,$type, + $lockedtype,$credits,$instsec] + +The constant values CL_SDOM, CL_SNAME, CL_END, etc. can be used +as indices into the returned list to future-proof clients against +changes in the list order. + +=back + +=cut -# ----- END HELPER FUNCTIONS -------------------------------------------- -1; -__END__ 500 Internal Server Error

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.