# The LearningOnline Network
# Pick a course
#
# $Id: lonpickcourse.pm,v 1.50.2.1 2006/06/29 17:44:03 albertel 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/
#

package Apache::lonpickcourse;

use strict;
use Apache::Constants qw(:common);
use Apache::loncommon;
use Apache::loncoursedata;
use Apache::lonnet;
use Apache::lonlocal;
use Apache::longroup;
use lib '/home/httpd/lib/perl/';
use LONCAPA;

sub handler {
    my $r = shift;
    &Apache::loncommon::content_type($r,'text/html');
    $r->send_http_header;
    return OK if $r->header_only;

# ------------------------------------------------------------ Print the screen

# Get parameters from query string
    &Apache::loncommon::get_unprocessed_cgi
        ($ENV{'QUERY_STRING'},['domainfilter','descriptfilter',
			       'sincefilter','form','cnumelement',
			       'cdomelement','cnameelement','roleelement',
                               'pickedcourse','instcodefilter',
                               'ownerfilter','coursefilter','multiple',
                               'type']);
# domain filter and selection
    my $domainfilter=$env{'form.domainfilter'};
    $domainfilter=~s/\W//g;
    unless ($domainfilter) { $domainfilter=''; }
    my $domainselectform=&Apache::loncommon::select_dom_form($domainfilter,
                                                          'domainfilter',1);
# description filter
    my $descriptfilter=$env{'form.descriptfilter'};
    unless ($descriptfilter) { $descriptfilter=''; }
    my $listdescript=&HTML::Entities::encode($descriptfilter,'<>&"');
# institutional code filter
    my $instcodefilter=$env{'form.instcodefilter'};
    unless ($instcodefilter) { $instcodefilter=''; }
    my $listinstcode=&HTML::Entities::encode($instcodefilter,'<>&"');
# course owner filter
    my $ownerfilter=$env{'form.ownerfilter'};
    unless ($ownerfilter) { $ownerfilter=''; }
    my $listowner=&HTML::Entities::encode($ownerfilter,'<>&"');
# course ID filter for DCs only
    my ($courseidtag,$coursefilter);
    if ($env{'user.adv'} && $domainfilter && exists($env{'user.role.dc./'.
                        $domainfilter.'/'})) {
        $coursefilter=$env{'form.coursefilter'};
        unless ($coursefilter) { $coursefilter=''; }
        my $listcourseid=&HTML::Entities::encode($coursefilter,'<>&"');
        $courseidtag = &mt('LON-CAPA course ID');
        $courseidtag .= qq|: <input type="text" name="coursefilter" size="25" value="$listcourseid" />
        <br />
        |;
    }
# last course activity filter and selection
    my $sincefilter=$env{'form.sincefilter'};
    $sincefilter=~s/[^\d-]//g;
    unless ($sincefilter) { $sincefilter=-1; }
    my $sincefilterform=&Apache::loncommon::select_form($sincefilter,
       'sincefilter',('-1'=>'',
                      '86400' => 'today',
                      '604800' => 'last week',
                      '2592000' => 'last month',
                      '7776000' => 'last three months',
                      '15552000' => 'last six months',
                      '31104000' => 'last year',
                      'select_form_order' =>
                      ['-1','86400','604800','2592000','7776000',
		      '15552000','31104000']));
# if called from loncreateuser, report sections, then close
    my (%loaditem,$seclist,$groupslist,$roleslist,$rolesnameslist,
	$accesslist,$accessnameslist);
    my $sec_element = 'currsec';
    my $grplist_element = 'groups';
    my $num_sections = 0;
    my $num_groups = 0;
    my $num_roles = 0;
    my $num_access = 0;
    my ($cdom,$cnum);
    if ($env{'form.pickedcourse'}) {
        ($cdom,$cnum) = split/_/,$env{'form.pickedcourse'};
    }
    my $type = $env{'form.type'};
    if (!defined($env{'form.type'})) {
        $type = 'Course';
    }
    if ($env{'form.form'} eq 'cu' && $env{'form.pickedcourse'}) {
        $loaditem{'onload'} ="setSections()";
        ($seclist,$num_sections,$groupslist,$num_groups) = 
             &build_selection_lists($cdom,$cnum,$type,undef,undef,
                                    $env{'form.form'});
    }
# if called from portfolio, report roles, sections, groups and close
    my ($roles_element,$groups_element,$status_element,$setitems_function);
    if ($env{'form.form'} eq 'portform' && $env{'form.pickedcourse'}) {
        my ($row_id) = ($env{'form.cnumelement'} =~ /^crsnum_(\d+)$/);
        $roles_element = 'role_'.$row_id.'_1';
        $groups_element = 'group_'.$row_id.'_1';
        $sec_element = 'section_'.$row_id.'_1';
        $status_element = 'access_'.$row_id.'_1';
        $grplist_element = 'grplist_'.$row_id.'_1';
        $loaditem{'onload'} ="setItems()";
        ($seclist,$num_sections,$groupslist,$num_groups,$roleslist,$num_roles,
         $rolesnameslist,$accesslist,$num_access,$accessnameslist) =
               &build_selection_lists($cdom,$cnum,$type,1,1,$env{'form.form'});
        $setitems_function = qq|
function setItems() {
    opener.document.$env{"form.form"}.activate.checked = true;
    setRoles();
    setGroups();
    setStatus();
    setSections();
}

function setRoles() {
    var numRoles = $num_roles
    var rolesArray = new Array("$roleslist");
    var roleNamesArray = new Array("$rolesnameslist");
    opener.document.$env{"form.form"}.$roles_element.length = 0;
    if (numRoles == 0) {
        opener.document.$env{"form.form"}.$roles_element.multiple=false;
        opener.document.$env{"form.form"}.$roles_element.size=1;
        opener.document.$env{"form.form"}.$roles_element.options[0] = new Option('No existing roles','',false,false);
    } else {
        if (numRoles == 1) {
            opener.document.$env{"form.form"}.$roles_element.multiple=false;
            opener.document.$env{"form.form"}.$roles_element.size=1;
            opener.document.$env{"form.form"}.$roles_element.options[0] = new Option('Select','',true,true);
            opener.document.$env{"form.form"}.$roles_element.options[1] = new Option(roleNamesArray[0],rolesArray[0],false,false);
        } else {
            for (var i=0; i<numRoles; i++) {
                opener.document.$env{"form.form"}.$roles_element.options[i] = new Option(roleNamesArray[i],rolesArray[i],false,false);
            }
            opener.document.$env{"form.form"}.$roles_element.multiple=true;
            if (numRoles < 3) {
                opener.document.$env{"form.form"}.$roles_element.size=numRoles;
            } else {
                opener.document.$env{"form.form"}.$roles_element.size=3;
            }
            opener.document.$env{"form.form"}.$roles_element.options[0].selected = false;
        }
    }
}

function setStatus() {
    var numStatus = $num_access;
    var statusArray = new Array("$accesslist");
    var statusNamesArray = new Array("$accessnameslist");
    opener.document.$env{"form.form"}.$status_element.multiple=true;
    opener.document.$env{"form.form"}.$status_element.size=3;
    for (var i=0; i<numStatus; i++) {
        opener.document.$env{"form.form"}.$status_element.options[i] = new Option(statusNamesArray[i],statusArray[i],false,false);
    }
}

function setGroups() {
    var numGroups = $num_groups;
    var groupsArray = new Array("$groupslist");
    opener.document.$env{"form.form"}.$groups_element.length = 0;
    if (numGroups == 0) {
        opener.document.$env{"form.form"}.$groups_element.multiple=false;
        opener.document.$env{"form.form"}.$groups_element.size=1;
        opener.document.$env{"form.form"}.$groups_element.options[0] = new Option('No existing groups','',false,false);
    } else {
        if (numGroups == 1) {
            opener.document.$env{"form.form"}.$groups_element.multiple=false;
            opener.document.$env{"form.form"}.$groups_element.size=1;
            opener.document.$env{"form.form"}.$groups_element.options[0] = new Option('Select','',true,true);
            opener.document.$env{"form.form"}.$groups_element.options[1] = new Option('No group','',false,false);
            opener.document.$env{"form.form"}.$groups_element.options[2] = new Option(groupsArray[0],groupsArray[0],false,false);
        } else {
            for (var i=0; i<numGroups; i++) {
                opener.document.$env{"form.form"}.$groups_element.options[i] = new Option(groupsArray[i],groupsArray[i],false,false);
            }
            opener.document.$env{"form.form"}.$groups_element.multiple=true;
            if (numGroups < 3) {
                opener.document.$env{"form.form"}.$groups_element.size=numGroups;
            } else {
                opener.document.$env{"form.form"}.$groups_element.size=3;
            }
            opener.document.$env{"form.form"}.$groups_element.options[0].selected = false;
        }
    }
}

|;
    }
    my $jscript;
    my $typeselectform =  '<select name="type" size="1"';
    $typeselectform .= ">\n";
    foreach my $posstype ('Course','Group') { 
        $typeselectform.='<option value="'.$posstype.'" "'.
            ($posstype eq $type ? 'selected="selected" ' : ''). ">$posstype</option>\n";
    }
    $typeselectform.="</select>";
    my $title = &mt('Selecting a [_1]',$type);
# Setup for multiple course selections, if flag for multiples set.
    my $multiple = $env{'form.multiple'};
    my $multelement;
    if ($multiple) {
        $title = &mt('Selecting [_1](s)',lc($type));
        $jscript = &Apache::loncommon::check_uncheck_jscript();
        $multelement = '<input type="hidden" name="multiple" value="'.$multiple.'" />';
    }
    $r->print(&Apache::loncommon::start_page($title,undef,
					     {'add_entries' => \%loaditem,
					      'no_nav_bar'  => 1, }));
    my %lt = (
	      'cac' => &mt('[_1] Activity',$type),
	      'cde' => &mt('[_1] Description',$type),
	      'cdo' => &mt('[_1] Domain',$type),
              'cin' => &mt('Course Institutional Code'),
              'cow' => &mt("[_1] Owner's Username",$type),
              'cog' => &mt('Course or Group')
             );
   
    my ($name_code,$name_input);
    if (defined($env{'form.cnameelement'}) && $env{'form.cnameelement'} ne '') {
	$name_code = "opener.document.$env{'form.form'}.$env{'form.cnameelement'}.value=cdesc;";
	$name_input ='<input type="hidden" name="cnameelement" value="'.
	    $env{'form.cnameelement'}.'" />';
    }
    my $submitopener = '';
    my $autosubmit = '';
    my $roleelement = '';
    my $lastaction = 'self.close()';
    if ($env{'form.form'} eq 'cu') {
        $lastaction = 'document.courselist.pickedcourse.value = cdom+"_"+cname;'."\n".
                      'document.courselist.submit();';
    }
    if ($env{'form.form'} eq 'portform') {
        $lastaction = 'document.courselist.pickedcourse.value = cdom+"_"+cname;'."\n".
                      'document.courselist.submit();';
    }
    my $roledom = $env{'form.roleelement'};
    if ($roledom) {
        $roleelement = '<input type="hidden" name="roleelement" value="'.$roledom.'" />';
        $submitopener = &Apache::lonroles::processpick();
        $autosubmit = 'process_pick("'.$roledom.'")';
    }
    my $instcodeform;
    if ($type eq 'Course') {
        $instcodeform = $lt{'cin'}.':<input type="text" name="instcodefilter" 
 size="10" value="'.$listinstcode.'" /><br />';
    }

    my %elements = (
                     Course => {
                                 name  => 'coursepick',
                                 total => 'coursetotal',
                                 list  => 'courselist',
                               },
                     Group => {
                                 name  => 'grouppick',
                                 total => 'grouptotal',
                                 list  => 'grouplist',
                             },
                    );

    $r->print(<<ENDSCRIPT);
<script>
function gochoose(cname,cdom,cdesc,multiple,caller) {
    var openerForm = "$env{'form.form'}";
    courseCount = 0;
    var courses = '';
    if (multiple) {
	if (typeof(document.courselist.course_id.length) == 'undefined') {
	    // only 1 course checkbox was created
	    if (document.courselist.course_id.checked) {
		courses = courses + document.courselist.course_id.value + "&&";
		courseCount ++;
	    }
	} else {
	    for (var j=0; j<document.courselist.course_id.length; j++) {
		if (document.courselist.course_id[j].checked) {
		    courses = courses + document.courselist.course_id[j].value + "&&";
		    courseCount ++;
		}
	    }
	} 
        opener.document.$env{'form.form'}.$elements{$type}{'total'}.value = courseCount;
	if (typeof(opener.document.$env{'form.form'}.$elements{$type}{'name'}.length) ==
	    'undefined') {
	    if (opener.document.$env{'form.form'}.$elements{$type}{'name'}.value == 'specific') {  
		opener.document.$env{'form.form'}.$elements{$type}{'name'}.checked = true;
	    } else {
		opener.document.$env{'form.form'}.$elements{$type}{'name'}.checked = false;
	    }
	} else {
	    for (var j=0; j<opener.document.$env{'form.form'}.$elements{$type}{'name'}.length; j++) { 
		if (opener.document.$env{'form.form'}.$elements{$type}{'name'}\[j].value == 'specific') {  
		    opener.document.$env{'form.form'}.$elements{$type}{'name'}\[j].checked = true;
		} else {
		    opener.document.$env{'form.form'}.$elements{$type}{'name'}\[j].checked = false;
		}
	    }
	}
	if (courseCount > 0) {
	    courses = courses.substr(0,courses.length-2);
	    opener.document.$env{'form.form'}.$elements{$type}{'list'}.value = courses;
	}
    } else {
        $name_code
        opener.document.$env{'form.form'}.$env{'form.cnumelement'}.value=cname;
        var slct=opener.document.$env{'form.form'}.$env{'form.cdomelement'};
        if (slct.options == undefined) {
            opener.document.$env{'form.form'}.$env{'form.cdomelement'}.value=cdom;
        }
        else {
            var i;
            for (i=0;i<slct.length;i++) {
                if (slct.options[i].value==cdom) { slct.selectedIndex=i; }
            }
        }
    }
    $autosubmit
    $lastaction
}

function setSections() {
    var numSections = $num_sections
    var sectionsArray = new Array("$seclist")
    opener.document.$env{"form.form"}.$sec_element.length = 0
    if (numSections == 0) {
        opener.document.$env{"form.form"}.$sec_element.multiple=false
        opener.document.$env{"form.form"}.$sec_element.size=1;
        opener.document.$env{"form.form"}.$sec_element.options[0] = new Option('No existing sections','',false,false)
    } else {
        if (numSections == 1) {
            opener.document.$env{"form.form"}.$sec_element.multiple=false;
            opener.document.$env{"form.form"}.$sec_element.size=1;
            opener.document.$env{"form.form"}.$sec_element.options[0] = new Option('Select','',true,true);
            opener.document.$env{"form.form"}.$sec_element.options[1] = new Option('No section','',false,false) 
            opener.document.$env{"form.form"}.$sec_element.options[2] = new Option(sectionsArray[0],sectionsArray[0],false,false);
        } else {
            for (var i=0; i<numSections; i++) {
                opener.document.$env{"form.form"}.$sec_element.options[i] = new Option(sectionsArray[i],sectionsArray[i],false,false)
            }
            opener.document.$env{"form.form"}.$sec_element.multiple=true
            if (numSections < 3) {
                opener.document.$env{"form.form"}.$sec_element.size=numSections;
            } else {
                opener.document.$env{"form.form"}.$sec_element.size=3;
            }
            opener.document.$env{"form.form"}.$sec_element.options[0].selected = false
        }
    }
    opener.document.$env{"form.form"}.$grplist_element.value='$groupslist';
    self.close()
}

$setitems_function

$jscript
</script>
$submitopener
<form method="post" name="filterpicker" action="/adm/pickcourse">
<input type="hidden" name="cnumelement" value="$env{'form.cnumelement'}" />
<input type="hidden" name="cdomelement" value="$env{'form.cdomelement'}" />
$name_input
<input type="hidden" name="form" value="$env{'form.form'}" />
$roleelement
$multelement
$lt{'cac'}: $sincefilterform
<br />
$lt{'cdo'}: $domainselectform
<!-- <br />
 $lt{'cog'}: $typeselectform -->
<br />
$instcodeform
$lt{'cow'}:
<input type="text" name="ownerfilter" size="10" value="$listowner" />
<br />
$courseidtag
$lt{'cde'}:
<input type="text" name="descriptfilter" size="40" value="$listdescript" />
<p><input type="submit" name="gosearch" value="Search" /></p>
</form>
<hr />
ENDSCRIPT
# ---------------------------------------------------------------- Get the data
    if ($env{'form.gosearch'}) {
        $r->print(&mt('Searching').' ...<br />&nbsp;<br />');
        $r->rflush();
	unless ($descriptfilter) { $descriptfilter='.'; }
        unless ($instcodefilter) { $instcodefilter='.'; }
        unless ($ownerfilter) { $ownerfilter='.'; }
        unless ($coursefilter) { $coursefilter='.'; }
        unless ($type) { $type = '.'; }
        my $timefilter=($sincefilter==-1?1:time-$sincefilter);
	my %courses=
	    &Apache::lonnet::courseiddump
	    ($domainfilter,$descriptfilter,$timefilter,$instcodefilter,$ownerfilter,$coursefilter,undef,undef,$type);
	$r->print('<form name="courselist" method="post" action="/adm/pickcourse">');
	my %by_descrip;
        my $numcourses = keys(%courses);
	foreach my $course (keys(%courses)) {
            my $descr;
            if ($courses{$course} =~ m/^([^:]*):/i) {
                $descr = &unescape($1);
            } else {
                $descr = &unescape($courses{$course});
            }
            my $description = $descr;
            push (@{$by_descrip{$description}}, $course);
	}
        if ($numcourses > 1 && $multiple) {
            $r->print('<input type="button" value="check all"
                    onclick="javascript:checkAll(document.courselist.course_id)" />                    &nbsp;&nbsp;<input type="button" value="uncheck all"
                    onclick="javascript:uncheckAll(document.courselist.course_id)" />
                    <br /><br />');
        }
	foreach my $description (sort 
				 { lc($a) cmp lc($b) } (keys(%by_descrip))) {
            foreach my $course (@{$by_descrip{$description}}) {
	        my $cleandesc=&HTML::Entities::encode($description,'<>&"');
	        $cleandesc=~s/'/\\'/g;
	        my ($cdom,$cnum)=split(/\_/,$course);
                my ($descr,$instcode,$owner,$ttype) = split/:/,$courses{$course};
                $r->print(&course_chooser($multiple,$cdom,$cnum,$cleandesc));
	        $r->print($description.'('.
		      ($Apache::lonnet::domaindescription{$cdom}?
                       $Apache::lonnet::domaindescription{$cdom}:$cdom).")");
                unless ($instcode eq '') {
                    $r->print(" - ".&unescape($instcode));
                }
                unless ($owner eq '') {
                    $r->print(", owner - ".&unescape($owner));
                }
                unless ($ttype eq '') {
                    $r->print('('.&Apache::lonnet::unescape($ttype).')');
                }
		if ($multiple) { $r->print("</label>\n"); }
                $r->print("<br />\n");
            }
	}
	if (!%courses) { 
            $r->print(&mt('None found'));
        } elsif ($multiple) {
            $r->print('<input type="button" value="Submit" onClick="gochoose('."'','','',1)".'" />');
        }
        $r->print('<input type="hidden" name="form" value="'.$env{'form.form'}.'" />'."\n".
                   '<input type="hidden" name="pickedcourse" value="" />'."\n".
                   '<input type="hidden" name="cnumelement" value="'.$env{'form.cnumelement'}.'" />'."\n".
                   '<input type="hidden" name="cdomelement" value="'.$env{'form.cdomelement'}.'" />'."\n".
                   '<input type="hidden" name="type" value="'.$type.'" />'."\n");
        if ((exists($env{'form.roleelement'})) && ($env{'form.form'} eq 'rolechoice')) {
           $r->print('<input type="hidden" name="roleelement" value="'.$env{'form.roleelement'}.'" />'."\n");
        }
        $r->print("</form>\n");
    }
    $r->print(&Apache::loncommon::end_page());
    return OK;
}

sub course_chooser {
    my ($multiple,$cdom,$cnum,$cleandesc) = @_;
    my $output; 
    if ($multiple) {
        $output = '<label><input type="checkbox" name="course_id" value="'.$cdom.'_'.$cnum.'" />'."\n";
    } else {
        $output = '<input type="button" value="Select" onClick="gochoose('.
                  "'".$cnum."','".$cdom."','".$cleandesc."')".'" />'."\n";
    }
    return $output;
}

sub build_selection_lists {
    my ($cdom,$cnum,$type,$needroles,$needaccess,$caller) = @_;
    my ($sections,$groups,$allroles,$roleshash,$accesshash) = 
          &Apache::loncommon::get_secgrprole_info($cdom,$cnum,$needroles,$type);
    if ($caller eq 'portform') {
        if (@{$sections} == 0) {
            @{$sections} = ('none');
        } else {
            unshift(@{$sections},('all','none'));
        }
        if (@{$groups} == 0) {
            @{$groups} = ('none');
        } else {
            unshift(@{$groups},('all','none'));
        }

    } 
    my $num_sections = scalar(@{$sections});
    my $seclist = join('","',@{$sections});
    my $num_groups = scalar(@{$groups});
    my $groupslist = join('","',@{$groups});
    my ($roleslist,$num_roles,$rolesnameslist,$num_access,$accesslist,
        $accessnameslist);
    if ($needroles) {
        $num_roles = @{$allroles};
        $roleslist = join('","',@{$allroles});
        my @allrolesnames; 
        foreach my $role (@{$allroles}) {
            push(@allrolesnames,$$roleshash{$role});
        }  
        $rolesnameslist = join('","',@allrolesnames);
    }
    if ($needaccess) {
        $num_access = keys(%{$accesshash});
        my (@allaccess,@allaccessnames);
        foreach my $key (sort(keys(%{$accesshash}))) {
            push(@allaccess,$key);
            push(@allaccessnames,$$accesshash{$key}); 
        }
        $accesslist = join('","',@allaccess);
        $accessnameslist = join('","',@allaccessnames);
    }
    return ($seclist,$num_sections,$groupslist,$num_groups,$roleslist,
            $num_roles,$rolesnameslist,$accesslist,$num_access,$accessnameslist);
}

1;
__END__