loncom/interface/lonsearchcat.pm - view

File: [LON-CAPA] / loncom / interface / lonsearchcat.pm
Revision 1.127: download - view: text, annotated - select for diffs
Mon Jun 24 15:26:28 2002 UTC (21 years, 10 months ago) by matthew
Branches: MAIN
CVS tags: HEAD

Removed global variables:
   %hostdomains
   %hostips
   %hitcount
   $yourself
Removed BEGIN block as all it did was initalize the globals above.

# The LearningOnline Network with CAPA # Search Catalog # # $Id: lonsearchcat.pm,v 1.127 2002/06/24 15:26:28 matthew Exp $ # # Copyright Michigan State University Board of Trustees # # This file is part of the LearningOnline Network with CAPA (LON-CAPA). # # LON-CAPA is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # LON-CAPA is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LON-CAPA; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # /home/httpd/html/adm/gpl.txt # # http://www.lon-capa.org/ # # YEAR=2001 # 3/8, 3/12, 3/13, 3/14, 3/15, 3/19 Scott Harrison # 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison # 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison # YEAR=2002 # 1/17 Scott Harrison # 6/17 Matthew Hall # ############################################################################### ############################################################################### =pod =head1 NAME lonsearchcat =head1 SYNOPSIS Search interface to LON-CAPAs digital library =head1 DESCRIPTION This module enables searching for a distributed browseable catalog. This is part of the LearningOnline Network with CAPA project described at http://www.lon-capa.org. lonsearchcat presents the user with an interface to search the LON-CAPA digital library. lonsearchcat also initiates the execution of a search by sending the search parameters to LON-CAPA servers. The progress of search (on a server basis) is displayed to the user in a seperate window. =head1 Internals =over 4 =cut ############################################################################### ############################################################################### ## ## ## ORGANIZATION OF THIS PERL MODULE ## ## ## ## 1. Modules used by this module ## ## 2. Choices for different output views (detailed, summary, xml, etc) ## ## 3. BEGIN block (to be run once after compilation) ## ## 4. Handling routine called via Apache and mod_perl ## ## 5. Other subroutines ## ## ## ############################################################################### package Apache::lonsearchcat; # ------------------------------------------------- modules used by this module use strict; use Apache::Constants qw(:common); use Apache::lonnet(); use Apache::File(); use CGI qw(:standard); use Text::Query; use GDBM_File; use Apache::loncommon(); # ---------------------------------------- variables used throughout the module ###################################################################### ###################################################################### =pod =item Global variables =over 4 =item $closebutton button that closes the search window =item $importbutton button to take the selecte results and go to group sorting =item %hash The ubiquitous database hash =item $diropendb The full path to the (temporary) search database file. This is set and used in &handler() and is also used in &output_results(). =back =cut ###################################################################### ###################################################################### # -- dynamically rendered interface components my $closebutton; # button that closes the search window my $importbutton; # button to take the selected results and go to group sorting # -- miscellaneous variables my %hash; # database hash my $diropendb = ""; # db file ###################################################################### ###################################################################### =pod =item &handler() - main handler invoked by httpd child =item Variables =over 4 =item $hidden holds 'hidden' html forms =item $scrout string that holds portions of the screen output =back =cut ###################################################################### ###################################################################### sub handler { my $r = shift; untie %hash; $r->content_type('text/html'); $r->send_http_header; return OK if $r->header_only; my $domain = $r->dir_config('lonDefDomain'); $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain). "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db"; &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, ['catalogmode','launch','acts','mode','form','element', 'reqinterface']); ## ## Clear out old values from database ## if ($ENV{'form.launch'} eq '1') { if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) { &start_fresh_session(); untie %hash; } else { $r->print('<html><head></head><body>Unable to tie hash to db '. 'file</body></html>'); return OK; } } ## ## Produce some output, so people know it is working ## $r->print("\n"); $r->rflush; ## ## Configure dynamic components of interface ## my $hidden; # Holds 'hidden' html forms if ($ENV{'form.catalogmode'} eq 'interactive') { $hidden="<input type='hidden' name='catalogmode' value='interactive'>". "\n"; $closebutton="<input type='button' name='close' value='CLOSE' ". "onClick='self.close()'>"."\n"; } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') { $hidden=<<END; <input type='hidden' name='catalogmode' value='groupsearch'> END $closebutton=<<END; <input type='button' name='close' value='CLOSE' onClick='self.close()'> END $importbutton=<<END; <input type='button' name='import' value='IMPORT' onClick='javascript:select_group()'> END } $hidden .= <<END; <input type='hidden' name='mode' value='$ENV{'form.mode'}'> <input type='hidden' name='form' value='$ENV{'form.form'}'> <input type='hidden' name='element' value='$ENV{'form.element'}'> <input type='hidden' name='date' value='2'> END ## ## What are we doing? ## if ($ENV{'form.basicsubmit'} eq 'SEARCH') { # Perform basic search and give results return &basicsearch($r,\%ENV,$hidden); } elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') { # Perform advanced search and give results return &advancedsearch($r,\%ENV,$hidden); } elsif ($ENV{'form.reqinterface'} eq 'advanced') { # Output the advanced interface $r->print(&advanced_search_form($closebutton,$hidden)); return OK; } else { # Output normal search interface $r->print(&basic_search_form($closebutton,$hidden)); } return OK; } ###################################################################### ###################################################################### =pod =item &basic_search_form() Returns a scalar which holds html for the basic search form. =cut ###################################################################### ###################################################################### sub basic_search_form{ my ($closebutton,$hidden) = @_; my $scrout=<<"ENDDOCUMENT"; <html> <head> <title>The LearningOnline Network with CAPA</title> <script type="text/javascript"> function openhelp(val) { openhelpwin=open('/adm/help/searchcat.html','helpscreen', 'scrollbars=1,width=600,height=300'); openhelpwin.focus(); } </script> </head> <body bgcolor="#FFFFFF"> <img align='right' src='/adm/lonIcons/lonlogos.gif' /> <h1>Search Catalog</h1> <form method="post" action="/adm/searchcat"> $hidden <h3>Basic Search</h3> <p> Enter terms or phrases separated by AND, OR, or NOT then press SEARCH below. </p> <p> <table> <tr><td> ENDDOCUMENT $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40). ' '; # $scrout.=&simplecheckbox('allversions',$ENV{'form.allversions'}); # $scrout.='<font color="#800000">Search historic archives</font>'; $scrout.=<<ENDDOCUMENT; </td><td><a href="/adm/searchcat?reqinterface=advanced">Advanced Search</a></td></tr></table> </p> <p>  <input type="submit" name="basicsubmit" value='SEARCH' />  $closebutton  <select name='basicviewselect'> <option value='Detailed Citation View' selected="true"> Detailed Citation View</option> <option value='Summary View'>Summary View</option> <option value='Fielded Format'>Fielded Format</option> <option value='XML/SGML'>XML/SGML</option> </select>  <input type="button" value="HELP" onClick="openhelp()" /> </p> </form> </body> </html> ENDDOCUMENT return $scrout; } ###################################################################### ###################################################################### =pod =item &advanced_search_form() Returns a scalar which holds html for the advanced search form. =cut ###################################################################### ###################################################################### sub advanced_search_form{ my ($closebutton,$hidden) = @_; my $scrout=<<"ENDHEADER"; <html> <head> <title>The LearningOnline Network with CAPA</title> <script type="text/javascript"> function openhelp(val) { openhelpwin=open('/adm/help/searchcat.html','helpscreen', 'scrollbars=1,width=600,height=300'); openhelpwin.focus(); } </script> </head> <body bgcolor="#FFFFFF"> <img align='right' src='/adm/lonIcons/lonlogos.gif' /> <h1>Search Catalog</h1> <form method="post" action="/adm/searchcat"> $hidden <hr /> <h3>Advanced Search</h3> ENDHEADER $scrout.=&searchphrasefield('Limit by title','title', $ENV{'form.title'}); $scrout.=&searchphrasefield('Limit by author','author', $ENV{'form.author'}); $scrout.=&searchphrasefield('Limit by subject','subject', $ENV{'form.subject'}); $scrout.=&searchphrasefield('Limit by keywords','keywords', $ENV{'form.keywords'}); $scrout.=&searchphrasefield('Limit by URL','url', $ENV{'form.url'}); # $scrout.=&searchphrasefield('Limit by version','version', # $ENV{'form.version'}); $scrout.=&searchphrasefield('Limit by notes','notes', $ENV{'form.notes'}); $scrout.=&searchphrasefield('Limit by abstract','abstract', $ENV{'form.abstract'}); $ENV{'form.mime'}='any' unless length($ENV{'form.mime'}); $scrout.=&selectbox('Limit by MIME type','mime', $ENV{'form.mime'}, 'any','Any type', \&{Apache::loncommon::filedescriptionex}, (&Apache::loncommon::fileextensions)); $ENV{'form.language'}='any' unless length($ENV{'form.language'}); $scrout.=&selectbox('Limit by language','language', $ENV{'form.language'},'any','Any Language', \&{Apache::loncommon::languagedescription}, (&Apache::loncommon::languageids), ); # ------------------------------------------------ Compute date selection boxes $scrout.=<<CREATIONDATESTART; <p> <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b> </font> <br /> between: CREATIONDATESTART $scrout.=&dateboxes('creationdatestart',1,1,1976, $ENV{'form.creationdatestart_month'}, $ENV{'form.creationdatestart_day'}, $ENV{'form.creationdatestart_year'}, ); $scrout.="and:\n"; $scrout.=&dateboxes('creationdateend',12,31,2051, $ENV{'form.creationdateend_month'}, $ENV{'form.creationdateend_day'}, $ENV{'form.creationdateend_year'}, ); $scrout.="</p>"; $scrout.=<<LASTREVISIONDATESTART; <p> <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE: </b></font> <br />between: LASTREVISIONDATESTART $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976, $ENV{'form.lastrevisiondatestart_month'}, $ENV{'form.lastrevisiondatestart_day'}, $ENV{'form.lastrevisiondatestart_year'}, ); $scrout.=<<LASTREVISIONDATEEND; and: LASTREVISIONDATEEND $scrout.=&dateboxes('lastrevisiondateend',12,31,2051, $ENV{'form.lastrevisiondateend_month'}, $ENV{'form.lastrevisiondateend_day'}, $ENV{'form.lastrevisiondateend_year'}, ); $scrout.='</p>'; $scrout.=&searchphrasefield('Limit by publisher/owner','owner', $ENV{'form.owner'}); $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'}); $scrout.=&selectbox('Limit by copyright/distribution','copyright', $ENV{'form.copyright'}, 'any','Any copyright/distribution', \&{Apache::loncommon::copyrightdescription}, (&Apache::loncommon::copyrightids), ); # ------------------------------------------- Compute customized metadata field $scrout.=<<CUSTOMMETADATA; <p> <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b> </font> For resource-specific metadata, enter in an expression in the form of <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br /> <b>Example:</b> grandmother=75 OR grandfather=85 <br /> CUSTOMMETADATA $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'}); $scrout.=<<CUSTOMSHOW; <p> <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b> </font> Enter in a space-separated list of special metadata fields to show in a fielded listing for each record result. <br /> CUSTOMSHOW $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'}); $scrout.=<<ENDDOCUMENT; <p> <input type="submit" name="advancedsubmit" value='SEARCH' /> <input type="reset" name="reset" value='RESET' /> $closebutton  <select name='advancedviewselect'> <option value='Detailed Citation View' selected="true"> Detailed Citation View</option> <option value='Summary View'>Summary View</option> <option value='Fielded Format'>Fielded Format</option> <option value='XML/SGML'>XML/SGML</option> </select>  <input type="button" value="HELP" onClick="openhelp()" /> </p> </form> </body> </html> ENDDOCUMENT return $scrout; } ###################################################################### ###################################################################### =pod =item &make_persistent() Returns a scalar which holds the current ENV{'form.*'} values in a 'hidden' html input tag. This allows search interface information to be somewhat persistent. =cut ###################################################################### ###################################################################### sub make_persistent { my $persistent=''; foreach (keys %ENV) { if (/^form\./ && !/submit/) { my $name=$_; my $key=$name; $ENV{$key}=~s/\'//g; # do not mess with html field syntax $name=~s/^form\.//; $persistent.=<<END; <input type="hidden" name="$name" value="$ENV{$key}" /> END } } return $persistent; } ###################################################################### ###################################################################### =pod =item HTML form building functions =over 4 =item &simpletextfield() Inputs: $name,$value,$size Returns a text input field with the given name, value, and size. If size is not specified, a value of 20 is used. =item &simplecheckbox() Inputs: $name,$value Returns a simple check box with the given $name. If $value eq 'on' the box is checked. =item &searchphrasefield() Inputs: $title,$name,$value Returns html for a title line and an input field for entering search terms. the instructions "Enter terms or phrases separated by search operators such as AND, OR, or NOT." are given following the title. The entry field (which is where the $name and $value are used) is an 80 column simpletextfield. =item &dateboxes() Returns html selection form elements for the specification of the day, month, and year. =item &selectbox() Returns html selection form. =back =cut ###################################################################### ###################################################################### sub simpletextfield { my ($name,$value,$size)=@_; $size = 20 if (! defined($size)); return '<input type="text" name="'.$name. '" size="'.$size.'" value="'.$value.'" />'; } sub simplecheckbox { my ($name,$value)=@_; my $checked=''; $checked="CHECKED" if $value eq 'on'; return '<input type="checkbox" name="'.$name.'" '. $checked . ' />'; } sub searchphrasefield { my ($title,$name,$value)=@_; my $instruction=<<END; Enter terms or phrases separated by search operators such as AND, OR, or NOT. END my $uctitle=uc($title); return "\n". '<p><font color="#800000" face="helvetica"><b>'.$uctitle.':</b>'. "</FONT> $instruction<br />".&simpletextfield($name,$value,80); } sub dateboxes { my ($name,$defaultmonth,$defaultday,$defaultyear, $currentmonth,$currentday,$currentyear)=@_; ($defaultmonth,$defaultday,$defaultyear)=('','',''); # # Day my $day=<<END; <select name="${name}_day"> <option value='$defaultday'> </option> END for (my $i = 1; $i<=31; $i++) { $day.="<option value=\"$i\">$i</option>\n"; } $day.="</select>\n"; $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday); # # Month my $month=<<END; <select name="${name}_month"> <option value='$defaultmonth'> </option> END my $i = 1; foreach (qw/January February March April May June July August September October November December /){ $month .="<option value=\"$i\">$_</option>\n"; $i++; } $month.="</select>\n"; $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth); # # Year (obviously) my $year=<<END; <select name="${name}_year"> <option value='$defaultyear'> </option> END my $maxyear = 2051; for (my $i = 1976; $i<=$maxyear; $i++) { $year.="<option value=\"$i\">$i</option>\n"; } $year.="</select>\n"; $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear); return "$month$day$year"; } sub selectbox { my ($title,$name,$value,$anyvalue,$anytag,$functionref,@idlist)=@_; my $uctitle=uc($title); my $selout="\n".'<p><font color="#800000" face="helvetica">'. '<b>'.$uctitle.':</b></font><br /><select name="'.$name.'">'; foreach ($anyvalue,@idlist) { $selout.='<option value="'.$_.'"'; if ($_ eq $value and !/^any$/) { $selout.=' selected >'.&{$functionref}($_).'</option>'; } elsif ($_ eq $value and /^$anyvalue$/) { $selout.=' selected >'.$anytag.'</option>'; } else {$selout.='>'.&{$functionref}($_).'</option>';} } return $selout.'</select>'; } ###################################################################### ###################################################################### =pod =item &advancedsearch() Parse advanced search results. =cut ###################################################################### ###################################################################### sub advancedsearch { my ($r,$envhash,$hidden)=@_; my %ENV=%{$envhash}; my $fillflag=0; # Clean up fields for safety for my $field ('title','author','subject','keywords','url','version', 'creationdatestart_month','creationdatestart_day', 'creationdatestart_year','creationdateend_month', 'creationdateend_day','creationdateend_year', 'lastrevisiondatestart_month','lastrevisiondatestart_day', 'lastrevisiondatestart_year','lastrevisiondateend_month', 'lastrevisiondateend_day','lastrevisiondateend_year', 'notes','abstract','mime','language','owner', 'custommetadata','customshow') { $ENV{"form.$field"}=~s/[^\w\/\s\=\-\"\']//g; } foreach ('mode','form','element') { # is this required? Hmmm. next unless (exists($ENV{"form.$_"})); $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"}); $ENV{"form.$_"}=~s/[^\w\/\s\=\-\"\']//g; } # Check to see if enough information was filled in for my $field ('title','author','subject','keywords','url','version', 'notes','abstract','mime','language','owner', 'custommetadata') { if (&filled($ENV{"form.$field"})) { $fillflag++; } } unless ($fillflag) { &output_blank_field_error($r); return OK; } # Turn the form input into a SQL-based query my $query=''; my @queries; # Evaluate logical expression AND/OR/NOT phrase fields. foreach my $field ('title','author','subject','notes','abstract','url', 'keywords','version','owner') { if ($ENV{'form.'.$field}) { push @queries,&build_SQL_query($field,$ENV{'form.'.$field}); } } # Evaluate option lists if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') { push @queries,"(language like \"$ENV{'form.language'}\")"; } if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') { push @queries,"(mime like \"$ENV{'form.mime'}\")"; } if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') { push @queries,"(copyright like \"$ENV{'form.copyright'}\")"; } # Evaluate date windows my $datequery=&build_date_queries( $ENV{'form.creationdatestart_month'}, $ENV{'form.creationdatestart_day'}, $ENV{'form.creationdatestart_year'}, $ENV{'form.creationdateend_month'}, $ENV{'form.creationdateend_day'}, $ENV{'form.creationdateend_year'}, $ENV{'form.lastrevisiondatestart_month'}, $ENV{'form.lastrevisiondatestart_day'}, $ENV{'form.lastrevisiondatestart_year'}, $ENV{'form.lastrevisiondateend_month'}, $ENV{'form.lastrevisiondateend_day'}, $ENV{'form.lastrevisiondateend_year'}, ); # Test to see if date windows are legitimate if ($datequery=~/^Incorrect/) { &output_date_error($r,$datequery); return OK; } elsif ($datequery) { push @queries,$datequery; } # Process form information for custom metadata querying my $customquery=''; if ($ENV{'form.custommetadata'}) { $customquery=&build_custommetadata_query('custommetadata', $ENV{'form.custommetadata'}); } my $customshow=''; if ($ENV{'form.customshow'}) { $customshow=$ENV{'form.customshow'}; $customshow=~s/[^\w\s]//g; my @fields=split(/\s+/,$customshow); $customshow=join(" ",@fields); } # Send query statements over the network to be processed by either the SQL # database or a recursive scheme of 'grep'-like actions (for custom # metadata). if (@queries) { $query=join(" AND ",@queries); $query="select * from metadata where $query"; my $reply; # reply hash reference unless ($customquery or $customshow) { $reply=&Apache::lonnet::metadata_query($query); } else { $reply=&Apache::lonnet::metadata_query($query, $customquery,$customshow); } &output_results('Advanced',$r,$envhash,$customquery,$reply,$hidden); return OK; } elsif ($customquery) { my $reply; # reply hash reference $reply=&Apache::lonnet::metadata_query('', $customquery,$customshow); &output_results('Advanced',$r,$envhash,$customquery,$reply,$hidden); return OK; } # should not get to this point return 'Error. Should not have gone to this point.'; } ###################################################################### ###################################################################### =pod =item &basicsearch() Parse basic search form. =cut ###################################################################### ###################################################################### sub basicsearch { my ($r,$envhash,$hidden)=@_; my %ENV=%{$envhash}; # Clean up fields for safety for my $field ('basicexp') { $ENV{"form.$field"}=~s/[^\w\s\-]//g; } foreach ('mode','form','element') { # is this required? Hmmm. next unless (exists($ENV{"form.$_"})); $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"}); $ENV{"form.$_"}=~s/[^\w\/\s\=\-\"\']//g; } # Check to see if enough is filled in unless (&filled($ENV{'form.basicexp'})) { &output_blank_field_error($r); return OK; } # Build SQL query string based on form page my $query=''; my $concatarg=join('," ",', ('title', 'author', 'subject', 'notes', 'abstract', 'keywords')); $concatarg='title' if $ENV{'form.titleonly'}; $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'}); # Get reply (either a hash reference to filehandles or bad connection) # &Apache::lonnet::logthis("metadata query started:".time); my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query); # &Apache::lonnet::logthis("metadata query finished:".time); # Output search results &output_results('Basic',$r,$envhash,$query,$reply,$hidden); return OK; } ###################################################################### ###################################################################### =pod =item &build_SQL_query() Builds a SQL query string from a logical expression with AND/OR keywords using Text::Query and &recursive_SQL_query_builder() =cut ###################################################################### ###################################################################### sub build_SQL_query { my ($field_name,$logic_statement)=@_; my $q=new Text::Query('abc', -parse => 'Text::Query::ParseAdvanced', -build => 'Text::Query::Build'); $q->prepare($logic_statement); my $matchexp=${$q}{'matchexp'}; chomp $matchexp; my $sql_query=&recursive_SQL_query_build($field_name,$matchexp); return $sql_query; } ###################################################################### ###################################################################### =pod =item &build_custommetadata_query() Constructs a custom metadata query using a rather heinous regular expression. =cut ###################################################################### ###################################################################### sub build_custommetadata_query { my ($field_name,$logic_statement)=@_; my $q=new Text::Query('abc', -parse => 'Text::Query::ParseAdvanced', -build => 'Text::Query::BuildAdvancedString'); $q->prepare($logic_statement); my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'}; # quick fix to change literal into xml tag-matching # will eventually have to write a separate builder module # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\> $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to /\\<$1\\>?# \<wordone\> \[\^\\<\]?# [^\<] \*$2\[\^\\<\]?# *wordtwo[^\<] \*\\<\\\/$1\\>?# *\<\/wordone\> /g; return $matchexp; } ###################################################################### ###################################################################### =pod =item &recursive_SQL_query_build() Recursively constructs an SQL query. Takes as input $dkey and $pattern. =cut ###################################################################### ###################################################################### sub recursive_SQL_query_build { my ($dkey,$pattern)=@_; my @matches=($pattern=~/(\[[^\]|\[]*\])/g); return $pattern unless @matches; foreach my $match (@matches) { $match=~/\[ (\w+)\s(.*) \]/; my ($key,$value)=($1,$2); my $replacement=''; if ($key eq 'literal') { $replacement="($dkey like \"\%$value\%\")"; } elsif ($key eq 'not') { $value=~s/like/not like/; # $replacement="($dkey not like $value)"; $replacement="$value"; } elsif ($key eq 'and') { $value=~/(.*[\"|\)]) ([|$|\^].*)/; $replacement="($1 AND $2)"; } elsif ($key eq 'or') { $value=~/(.*[\"|$]) ([|\(|\^].*)/; $replacement="($1 OR $2)"; } substr($pattern, index($pattern,$match), length($match), $replacement ); } &recursive_SQL_query_build($dkey,$pattern); } ###################################################################### ###################################################################### =pod =item &build_date_queries() Builds a SQL logic query to check time/date entries. Also reports errors (check for /^Incorrect/). =cut ###################################################################### ###################################################################### sub build_date_queries { my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2, $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_; my @queries; if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) { unless ($cmonth1 and $cday1 and $cyear1 and $cmonth2 and $cday2 and $cyear2) { return "Incorrect entry for the creation date. You must specify ". "a starting month, day, and year and an ending month, ". "day, and year."; } my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1); $cnumeric1+=0; my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2); $cnumeric2+=0; if ($cnumeric1>$cnumeric2) { return "Incorrect entry for the creation date. The starting ". "date must occur before the ending date."; } my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '". "$cyear2-$cmonth2-$cday2 23:59:59')"; push @queries,$cquery; } if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) { unless ($lmonth1 and $lday1 and $lyear1 and $lmonth2 and $lday2 and $lyear2) { return "Incorrect entry for the last revision date. You must ". "specify a starting month, day, and year and an ending ". "month, day, and year."; } my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1); $lnumeric1+=0; my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2); $lnumeric2+=0; if ($lnumeric1>$lnumeric2) { return "Incorrect entry for the last revision date. The ". "starting date must occur before the ending date."; } my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '". "$lyear2-$lmonth2-$lday2 23:59:59')"; push @queries,$lquery; } if (@queries) { return join(" AND ",@queries); } return ''; } ###################################################################### ###################################################################### =pod =item &output_results() Format and output results based on a reply list. There are two windows that this function writes to. The main search window ("srch") has a listing of the results. A secondary window ("popwin") gives the status of the network search (time elapsed, number of machines contacted, etc.) =cut ###################################################################### ###################################################################### sub output_results { # &Apache::lonnet::logthis("output_results:".time); my $fnum; # search result counter my ($mode,$r,$envhash,$query,$replyref,$hidden)=@_; my %ENV=%{$envhash}; my %rhash=%{$replyref}; my $compiledresult=''; my $timeremain=300; # (seconds) my $elapsetime=0; my $resultflag=0; my $tflag=1; # # make query information persistent to allow for subsequent revision my $persistent=&make_persistent(); # spit out the generic header $r->print(&search_results_header()); $r->rflush(); # begin showing the cataloged results $r->print(<<CATALOGBEGIN); </head> <body bgcolor="#ffffff"> <img align=right src=/adm/lonIcons/lonlogos.gif> <h1>Search Catalog</h1> CATALOGBEGIN $r->print(<<CATALOGCONTROLS); <form name='results' method="post" action="/adm/searchcat"> $hidden <input type='hidden' name='acts' value='' /> <input type='button' value='Revise search request' onClick='this.form.submit();' /> $importbutton $closebutton $persistent <hr /> <h3>Search Query</h3> CATALOGCONTROLS # # Remind them what they searched for # if ($mode eq 'Basic') { $r->print('<p><b>Basic search:</b> '.$ENV{'form.basicexp'}.'</p>'); } elsif ($mode eq 'Advanced') { $r->print('<p><b>Advanced search</b> '.$query.'</p>'); } $r->print('<h3>Search Results</h3>'); $r->rflush(); # # make the pop-up window for status # $r->print(&make_popwin(%rhash)); $r->rflush(); ## ## Prepare for the main loop below ## my $servercount=0; my $hitcountsum=0; my $servernum=(keys %rhash); my $serversleft=$servernum; ## ## Run until we run out of time or we run out of servers ## while($serversleft && $timeremain) { ## ## %rhash has servers deleted from it as results come in ## (within the foreach loop below). ## foreach my $rkey (sort keys %rhash) { # &Apache::lonnet::logthis("Server $rkey:".time); $servercount++; $compiledresult=''; my $reply=$rhash{$rkey}; my @results; if ($reply eq 'con_lost') { &popwin_imgupdate($r,$rkey,"srvbad.gif"); $serversleft--; delete $rhash{$rkey}; } else { # must do since 'use strict' checks for tainting $reply=~/^([\.\w]+)$/; my $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1; $reply=~/(.*?)\_/; for (my $counter=0;$counter<2;$counter++) { if (-e $replyfile && ! -e "$replyfile.end") { &popwin_imgupdate($r,$rkey,"srvhalf.gif"); &popwin_js($r,'popwin.hc["'.$rkey.'"]='. '"still transferring..."'.';'); } # Are we finished transferring data? if (-e "$replyfile.end") { $serversleft--; delete $rhash{$rkey}; if (-s $replyfile) { &popwin_imgupdate($r,$rkey,"srvgood.gif"); my $fh; unless ($fh=Apache::File->new($replyfile)){ # Is it really appropriate to die on this error? $r->print('ERROR: file '. $replyfile.' cannot be opened'); return OK; } @results=<$fh> if $fh; my $hits =@results; &popwin_js($r,'popwin.hc["'.$rkey.'"]='. $hits.';'); $hitcountsum+=$hits; &popwin_js($r,'popwin.document.forms.popremain.'. 'numhits.value='.$hitcountsum.';'); } else { &popwin_imgupdate($r,$rkey,"srvempty.gif"); &popwin_js($r,'popwin.hc["'.$rkey.'"]=0;'); } last; } # end of if ( -e "$replyfile.end") last unless $timeremain; sleep 1; # wait for daemons to write files? $timeremain--; $elapsetime++; &popwin_js($r,"popwin.document.popremain.". "elapsetime.value=$elapsetime;"); } &popwin_js($r,'popwin.document.whirly.'. 'src="/adm/lonIcons/lonanimend.gif";'); } # end of if ($reply eq 'con_lost') else statement my %Fields = undef; # Holds the data to be sent to the various # *_view routines. my ($extrashow,$customfields,$customhash) = &handle_custom_fields(\@results); my @customfields = @$customfields; my %customhash = %$customhash; untie %hash if (keys %hash); # if (! tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) { $r->print('<html><head></head><body>Unable to tie hash to db '. 'file</body></html>'); } else { if ($ENV{'form.launch'} eq '1') { &start_fresh_session(); } foreach my $result (@results) { next if $result=~/^custom\=/; chomp $result; next unless $result; %Fields = &parse_raw_result($result,$rkey); $Fields{'extrashow'}=$extrashow; if ($extrashow) { foreach my $field (@customfields) { my $value=''; $value = $1 if ($customhash{$Fields{'url'}}=~/\<{$field}[^\>]*\>(.*?)\<\/{$field}[^\>]*\>/s); $Fields{'extrashow'}=~s/\<\!\-\- $field \-\-\>/ $value/g; } } if ($compiledresult or $servercount!=$servernum) { $compiledresult.="<hr align='left' width='200' noshade />"; } $compiledresult.="\n<p>\n"; if ($ENV{'form.catalogmode'} eq 'interactive') { my $titleesc=$Fields{'title'}; $titleesc=~s/\'/\\'/; # ' $compiledresult.=<<END if ($ENV{'form.catalogmode'} eq 'interactive'); <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT" onClick="javascript:select_data('$titleesc','$Fields{'url'}')"> </font> <br /> END } if ($ENV{'form.catalogmode'} eq 'groupsearch') { $fnum+=0; $hash{"pre_${fnum}_link"}=$Fields{'url'}; $hash{"pre_${fnum}_title"}=$Fields{'title'}; $compiledresult.=<<END; <font size='-1'> <input type="checkbox" name="returnvalues" value="SELECT" onClick="javascript:queue($fnum)" /> </font> <br /> END # <input type="hidden" name="title$fnum" value="$title" /> # <input type="hidden" name="url$fnum" value="$url" /> $fnum++; } my $viewselect; if ($mode eq 'Basic') { $viewselect=$ENV{'form.basicviewselect'}; } elsif ($mode eq 'Advanced') { $viewselect=$ENV{'form.advancedviewselect'}; } if ($viewselect eq 'Detailed Citation View') { $compiledresult.=&detailed_citation_view (%Fields, hostname => $rkey ); } elsif ($viewselect eq 'Summary View') { $compiledresult.=&summary_view (%Fields, hostname => $rkey ); } elsif ($viewselect eq 'Fielded Format') { $compiledresult.=&fielded_format_view (%Fields, hostname => $rkey ); } elsif ($viewselect eq 'XML/SGML') { $compiledresult.=&xml_sgml_view (%Fields, hostname => $rkey ); } } untie %hash; } if ($compiledresult) { $resultflag=1; $r->print($compiledresult); } my $percent=sprintf('%3.0f',($servercount/$servernum*100)); } # End of foreach loop over servers remaining } # End of big loop - while($serversleft && $timeremain) unless ($resultflag) { $r->print("\nThere were no results that matched your query\n"); } # $r->print('<script type="text/javascript">'.'popwin.close()</script>'."\n"); $r->rflush(); $r->print("</body>\n</html>\n"); return; } ########################################################### ########################################################### =pod =item &parse_raw_result() Takes a line from the file of results and parse it. Returns a hash with keys for the following fields: 'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes', 'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate', 'lastrevisiondate'. In addition, the following tags are set by calling the appropriate lonnet function: 'language', 'cprtag', 'mimetag'. The 'title' field is set to "Untitled" if the title field is blank. 'abstract' and 'keywords' are truncated to 200 characters. =cut ########################################################### ########################################################### sub parse_raw_result { my ($result,$hostname) = @_; # Check for a comma - if it is there then we do not need to unescape the # string. There seems to be some kind of problem with some items in # the database - the entire string gets sent out unescaped...? unless ($result =~ /,/) { $result = &Apache::lonnet::unescape($result); } my @fields=map { &Apache::lonnet::unescape($_); } (split(/\,/,$result)); my ($title,$author,$subject,$url,$keywords,$version, $notes,$abstract,$mime,$lang, $creationdate,$lastrevisiondate,$owner,$copyright)=@fields; my %Fields = ( title => &Apache::lonnet::unescape($title), author => &Apache::lonnet::unescape($author), subject => &Apache::lonnet::unescape($subject), url => &Apache::lonnet::unescape($url), keywords => &Apache::lonnet::unescape($keywords), version => &Apache::lonnet::unescape($version), notes => &Apache::lonnet::unescape($notes), abstract => &Apache::lonnet::unescape($abstract), mime => &Apache::lonnet::unescape($mime), lang => &Apache::lonnet::unescape($lang), owner => &Apache::lonnet::unescape($owner), copyright => &Apache::lonnet::unescape($copyright), creationdate => &Apache::lonnet::unescape($creationdate), lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate) ); $Fields{'language'} = &Apache::loncommon::languagedescription($Fields{'lang'}); $Fields{'copyrighttag'} = &Apache::loncommon::copyrightdescription($Fields{'copyright'}); $Fields{'mimetag'} = &Apache::loncommon::filedescription($Fields{'mime'}); # Put spaces in the keyword list, if needed. $Fields{'keywords'}=~ s/,([A-z])/, $1/g; if ($Fields{'title'}=~ /^\s*$/ ) { $Fields{'title'}='Untitled'; } unless ($ENV{'user.adv'}) { $Fields{'keywords'} = '- not displayed -'; $Fields{'notes'} = '- not displayed -'; $Fields{'abstract'} = '- not displayed -'; $Fields{'subject'} = '- not displayed -'; } if (length($Fields{'abstract'})>200) { $Fields{'abstract'} = substr($Fields{'abstract'},0,200).'...'; } if (length($Fields{'keywords'})>200) { $Fields{'keywords'} = substr($Fields{'keywords'},0,200).'...'; } return %Fields; } ########################################################### ########################################################### =pod =item &handle_custom_fields() =cut ########################################################### ########################################################### sub handle_custom_fields { my @results = @{shift()}; my $customshow=''; my $extrashow=''; my @customfields; if ($ENV{'form.customshow'}) { $customshow=$ENV{'form.customshow'}; $customshow=~s/[^\w\s]//g; my @fields=map { "<font color=\"#008000\">$_:</font>"; } split(/\s+/,$customshow); @customfields=split(/\s+/,$customshow); if ($customshow) { $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n"; } } my $customdata=''; my %customhash; foreach my $result (@results) { if ($result=~/^(custom\=.*)$/) { # grab all custom metadata my $tmp=$result; $tmp=~s/^custom\=//; my ($k,$v)=map {&Apache::lonnet::unescape($_); } split(/\,/,$tmp); $customhash{$k}=$v; } } return ($extrashow,\@customfields,\%customhash); } ###################################################################### ###################################################################### =pod =item &search_results_header Output the proper javascript code to deal with different calling modes. Takes inputs directly from from %ENV. The following environment variables are checked: =over 4 =item 'form.catalogmode' Checked for 'interactive' and 'groupsearch'. =item 'form.mode' Checked for existance & 'edit' mode. =item 'form.form' =item 'form.element' =back =cut ###################################################################### ###################################################################### sub search_results_header { my $result = ''; # output beginning of search page $result.=<<BEGINNING; <html> <head> <title>The LearningOnline Network with CAPA</title> BEGINNING # conditional output of script functions dependent on the mode in # which the search was invoked if ($ENV{'form.catalogmode'} eq 'interactive'){ if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') { $result.=<<SCRIPT; <script type="text/javascript"> function select_data(title,url) { changeTitle(title); changeURL(url); self.close(); } function changeTitle(val) { if (opener.inf.document.forms.resinfo.elements.t) { opener.inf.document.forms.resinfo.elements.t.value=val; } } function changeURL(val) { if (opener.inf.document.forms.resinfo.elements.u) { opener.inf.document.forms.resinfo.elements.u.value=val; } } </script> SCRIPT } elsif ($ENV{'form.mode'} eq 'edit') { my $form = $ENV{'form.form'}; my $element = $ENV{'form.element'}; $result.=<<SCRIPT; <script type="text/javascript"> function select_data(title,url) { changeURL(url); self.close(); } function changeTitle(val) { } function changeURL(val) { if (window.opener.document) { window.opener.document.forms["$form"].elements["$element"].value=val; } else { var url = 'forms[\"$form\"].elements[\"$element\"].value'; alert("Unable to transfer data to "+url); } } </script> SCRIPT } } $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch'; <script type="text/javascript"> function select_data(title,url) { // alert('DEBUG: Should be storing '+title+' and '+url); } function queue(val) { if (eval("document.forms.results.returnvalues["+val+"].checked")) { document.forms.results.acts.value+='1a'+val+'b'; } else { document.forms.results.acts.value+='0a'+val+'b'; } } function select_group() { window.location= "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+ document.forms.results.acts.value; } </script> SCRIPT $result.=<<SCRIPT; <script type="text/javascript"> function displayinfo(val) { popwin.document.forms.popremain.sdetails.value=val; } function openhelp(val) { openhelpwin=open('/adm/help/searchcat.html','helpscreen', 'scrollbars=1,width=400,height=300'); openhelpwin.focus(); } function abortsearch(val) { popwin.close(); } </script> SCRIPT return $result; } ###################################################################### ###################################################################### =pod =item &make_popwin() Returns html with javascript in it to open up the status window. =cut ###################################################################### ###################################################################### sub make_popwin { my %rhash = @_; my $servernum=(keys %rhash); my $hcinit; my $grid="'<br />'+\n"; # $sn is the server number, used ONLY to make sure we have # rows of 10 each. No longer used to index images. my $sn=1; foreach my $sk (sort keys %rhash) { # '<a href=" $grid.="'<a href=\""; # javascript:displayinfo('+ $grid.="javascript:opener.displayinfo('+"; # "'"+'key $grid.="\"'\"+'"; $grid.=$sk; my $hc; if ($rhash{$sk} eq 'con_lost') { $hc="BAD CONNECTION, CONTACT SYSTEM ADMINISTRATOR "; } else { $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'"; $hcinit.="hc[\"$sk\"]=\"not yet connected...\";"; } $grid.=" hitcount=".$hc; $grid.=" domain=".$Apache::lonnet::hostdom{$sk}; $grid.=" IP=".$Apache::lonnet::hostip{$sk}; # '+"'"+'">'+ $grid.="'+\"'\"+')\">'+"; $grid.="\n"; $grid.="'<img border=\"0\" name=\"img_".$Apache::lonnet::hostdom{$sk}. '_'.$sk."\" src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk. "\" /></a>'+\n"; $grid.="'<br />'+\n" unless $sn%10; $sn++; } my $result.=<<ENDPOP; <script type="text/javascript"> popwin=open('','popwin','scrollbars=1,width=400,height=220'); popwin.focus(); popwin.document.writeln('<'+'html>'); popwin.document.writeln('<'+'head>'); popwin.document.writeln('<'+'script>'); popwin.document.writeln('hc=new Array();$hcinit'); popwin.document.writeln('<'+'/script>'); popwin.document.writeln('<'+'/head>'+ '<'+'body bgcolor="#FFFFFF">'+ '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+ 'lonanim.gif" '+ 'alt="animated logo" />'+ '<'+'h3>Search Results Progress<'+'/h3>'+ '<'+'form name="popremain">'+ '<'+'tt>'+ '<'+'br clear="all"/><i>PLEASE BE PATIENT</i>'+ '<'+'br />SCANNING $servernum SERVERS'+ '<'+'br clear="all" />Number of record hits found '+ '<'+'input type="text" size="10" name="numhits"'+ ' value="0" />'+ '<'+'br clear="all" />Time elapsed '+ '<'+'input type="text" size="10" name="elapsetime"'+ ' value="0" />'+ '<'+'br />'+ 'SERVER GRID (click on any cell for details)'+ $grid '<'+'br />'+ 'Server details '+ '<'+'input type="text" size="35" name="sdetails"'+ ' value="" />'+ '<'+'br />'+ ' <'+'input type="button" name="button"'+ ' value="close this window" '+ ' onClick="javascript:opener.abortsearch()" />'+ ' <'+'input type="button" name="button"'+ ' value="help" onClick="javascript:opener.openhelp()" />'+ '<'+'/tt>'+ '<'+'/form>'+ '<'+'/body><'+'/html>'); popwin.document.close(); </script> ENDPOP return $result; } ###################################################################### ###################################################################### =pod =item Metadata Viewing Functions Output is a HTML-ified string. Input arguments are title, author, subject, url, keywords, version, notes, short abstract, mime, language, creation date, last revision date, owner, copyright, hostname, and extra custom metadata to show. =over 4 =item &detailed_citation_view() =cut ###################################################################### ###################################################################### sub detailed_citation_view { my %values = @_; my $result=<<END; <i>$values{'owner'}</i>, last revised $values{'lastrevisiondate'} <h3><a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>$values{'title'}</a></h3> <h3>$values{'author'}</h3> </p> <p> <b>Subject:</b> $values{'subject'}<br /> <b>Keyword(s):</b> $values{'keywords'}<br /> <b>Notes:</b> $values{'notes'}<br /> <b>MIME Type:</b> END $result.=&Apache::loncommon::filedescription($values{'mime'}); $result.=<<END; <br /> <b>Language:</b> END $result.=&Apache::loncommon::languagedescription($values{'lang'}); $result.=<<END; <br /> <b>Copyright/Distribution:</b> END $result.=&Apache::loncommon::copyrightdescription($values{'copyright'}); $result.=<<END; <br /> </p> $values{'extrashow'} <p> $values{'shortabstract'} </p> END return $result; } ###################################################################### ###################################################################### =pod =item &summary_view() =cut ###################################################################### ###################################################################### sub summary_view { my %values = @_; my $result=<<END; <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>$values{'author'}</a><br /> $values{'title'}<br /> $values{'owner'} -- $values{'lastrevisiondate'}<br /> $values{'copyrighttag'}<br /> $values{'extrashow'} </p> END return $result; } ###################################################################### ###################################################################### =pod =item &fielded_format_view() =cut ###################################################################### ###################################################################### sub fielded_format_view { my %values = @_; my $result=<<END; <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" target='search_preview'>$values{'url'}</a> <br /> <b>Title:</b> $values{'title'}<br /> <b>Author(s):</b> $values{'author'}<br /> <b>Subject:</b> $values{'subject'}<br /> <b>Keyword(s):</b> $values{'keywords'}<br /> <b>Notes:</b> $values{'notes'}<br /> <b>MIME Type:</b> $values{'mimetag'}<br /> <b>Language:</b> $values{'language'}<br /> <b>Creation Date:</b> $values{'creationdate'}<br /> <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br /> <b>Publisher/Owner:</b> $values{'owner'}<br /> <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br /> <b>Repository Location:</b> $values{'hostname'}<br /> <b>Abstract:</b> $values{'shortabstract'}<br /> $values{'extrashow'} </p> END return $result; } ###################################################################### ###################################################################### =pod =item &xml_sgml_view() =back =cut ###################################################################### ###################################################################### sub xml_sgml_view { my %values = @_; my $result=<<END; <pre> <LonCapaResource> <url>$values{'url'}</url> <title>$values{'title'}</title> <author>$values{'author'}</author> <subject>$values{'subject'}</subject> <keywords>$values{'keywords'}</keywords> <notes>$values{'notes'}</notes> <mimeInfo> <mime>$values{'mime'}</mime> <mimetag>$values{'mimetag'}</mimetag> </mimeInfo> <languageInfo> <language>$values{'lang'}</language> <languagetag>$values{'language'}</languagetag> </languageInfo> <creationdate>$values{'creationdate'}</creationdate> <lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate> <owner>$values{'owner'}</owner> <copyrightInfo> <copyright>$values{'copyright'}</copyright> <copyrighttag>$values{'copyrighttag'}</copyrighttag> </copyrightInfo> <repositoryLocation>$values{'hostname'}</repositoryLocation> <shortabstract>$values{'shortabstract'}</shortabstract> </LonCapaResource> </pre> $values{'extrashow'} END return $result; } ###################################################################### ###################################################################### =pod =item &filled() see if field is filled. =cut ###################################################################### ###################################################################### sub filled { my ($field)=@_; if ($field=~/\S/ && $field ne 'any') { return 1; } else { return 0; } } ###################################################################### ###################################################################### =pod =item &output_blank_field_error() =cut ###################################################################### ###################################################################### sub output_blank_field_error { my ($r)=@_; # make query information persistent to allow for subsequent revision my $persistent=&make_persistent(); $r->print(<<BEGINNING); <html> <head> <title>The LearningOnline Network with CAPA</title> BEGINNING $r->print(<<RESULTS); </head> <body bgcolor="#ffffff"> <img align='right' src='/adm/lonIcons/lonlogos.gif' /> <h1>Search Catalog</h1> <form method="post" action="/adm/searchcat"> $persistent <input type='button' value='Revise search request' onClick='this.form.submit();' /> $closebutton <hr /> <h3>Helpful Message</h3> <p> Incorrect search query due to blank entry fields. You need to fill in the relevant fields on the search page in order for a query to be processed. </p> </body> </html> RESULTS } ###################################################################### ###################################################################### =pod =item &output_date_error() Output a full html page with an error message. =cut ###################################################################### ###################################################################### sub output_date_error { my ($r,$message)=@_; # make query information persistent to allow for subsequent revision my $persistent=&make_persistent(); $r->print(<<RESULTS); <html> <head> <title>The LearningOnline Network with CAPA</title> </head> <body bgcolor="#ffffff"> <img align='right' src='/adm/lonIcons/lonlogos.gif' /> <h1>Search Catalog</h1> <form method="post" action="/adm/searchcat"> $persistent <input type='button' value='Revise search request' onClick='this.form.submit();' /> $closebutton <hr /> <h3>Helpful Message</h3> <p> $message </p> </body> </html> RESULTS } ###################################################################### ###################################################################### =pod =item &start_fresh_session() Cleans the global %hash by removing all fields which begin with 'pre_' or 'store'. =cut ###################################################################### ###################################################################### sub start_fresh_session { delete $hash{'mode_catalog'}; foreach (keys %hash) { if ($_ =~ /^pre_/) { delete $hash{$_}; } if ($_ =~ /^store/) { delete $hash{$_}; } } } ###################################################################### ###################################################################### =pod =item &popwin_js() send javascript to popwin =cut ###################################################################### ###################################################################### sub popwin_js { # Print javascript out to popwin, but make sure we dont generate # any javascript errors in doing so. my ($r,$text) = @_; $r->print(<<"END"); <script type="text/javascript"> if (! popwin.closed) { $text } </script> END $r->rflush(); } ###################################################################### ###################################################################### =pod =item &popwin_imgupdate() Send a given image (and its location) out to the browser. Takes as input $r, loncapa server id, and an icon URL. =cut ###################################################################### ###################################################################### sub popwin_imgupdate { my ($r,$server,$icon) = @_; &popwin_js($r,'popwin.document.img_'.$Apache::lonnet::hostdom{$server}. '_'.$server.'.'.'src="/adm/lonIcons/'.$icon.'";'); } 1; __END__ =pod =back =cut