1: # The LearningOnline Network
2: # Pick a course
3: #
4: # $Id: lonpickcourse.pm,v 1.23 2004/12/28 05:55:11 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonpickcourse;
30:
31: use strict;
32: use Apache::Constants qw(:common);
33: use Apache::loncommon;
34: use Apache::loncoursedata;
35: use Apache::lonnet;
36: use Apache::lonlocal;
37:
38: sub handler {
39: my $r = shift;
40: &Apache::loncommon::content_type($r,'text/html');
41: $r->send_http_header;
42: return OK if $r->header_only;
43:
44: # ------------------------------------------------------------ Print the screen
45: $r->print(<<ENDDOCUMENT);
46: <html>
47: <head>
48: <title>The LearningOnline Network with CAPA</title>
49: </head>
50: ENDDOCUMENT
51: # Get parameters from query string
52: &Apache::loncommon::get_unprocessed_cgi
53: ($ENV{'QUERY_STRING'},['domainfilter','descriptfilter',
54: 'sincefilter','form','cnumelement',
55: 'cdomelement','cnameelement','roleelement',
56: 'pickedcourse','instcodefilter','ownerfilter']);
57: # domain filter and selection
58: my $domainfilter=$ENV{'form.domainfilter'};
59: $domainfilter=~s/\W//g;
60: unless ($domainfilter) { $domainfilter=''; }
61: my $domainselectform=&Apache::loncommon::select_dom_form($domainfilter,
62: 'domainfilter',1);
63: # description filter
64: my $descriptfilter=$ENV{'form.descriptfilter'};
65: unless ($descriptfilter) { $descriptfilter=''; }
66: my $listdescript=&HTML::Entities::encode($descriptfilter,'<>&"');
67: # institutional code filter
68: my $instcodefilter=$ENV{'form.instcodefilter'};
69: unless ($instcodefilter) { $instcodefilter=''; }
70: my $listinstcode=&HTML::Entities::encode($instcodefilter,'<>&"');
71: # course owner filter
72: my $ownerfilter=$ENV{'form.ownerfilter'};
73: unless ($ownerfilter) { $ownerfilter=''; }
74: my $listowner=&HTML::Entities::encode($ownerfilter,'<>&"');
75: # last course activity filter and selection
76: my $sincefilter=$ENV{'form.sincefilter'};
77: $sincefilter=~s/[^\d-]//g;
78: unless ($sincefilter) { $sincefilter=-1; }
79: my $sincefilterform=&Apache::loncommon::select_form($sincefilter,
80: 'sincefilter',('-1'=>'',
81: '86400' => 'today',
82: '604800' => 'last week',
83: '2592000' => 'last month',
84: '7776000' => 'last three months',
85: '15552000' => 'last six months',
86: '31104000' => 'last year',
87: 'select_form_order' =>
88: ['-1','86400','604800','2592000','7776000',
89: '15552000','31104000']));
90: # if called from loncreateuser, report sections, then close
91: my ($loaditem,$seclist);
92: my $num_sections = 0;
93: if ($ENV{'form.form'} eq 'cu' && $ENV{'form.pickedcourse'}) {
94: $loaditem = 'onLoad="setSections()"';
95: my ($cdom,$cnum) = split/_/,$ENV{'form.pickedcourse'};
96: my %sections_count = ();
97: $num_sections = &Apache::loncommon::get_sections($cdom,$cnum,\%sections_count);
98: my @sections = ();
99: if ($num_sections > 0) {
100: @sections = (sort {$a <=> $b} keys %sections_count);
101: $seclist = join('","',@sections);
102: }
103: }
104: $r->print(&Apache::loncommon::bodytag("Selecting a Course",undef,$loaditem));
105: my %lt=&Apache::lonlocal::texthash(
106: 'cac' => 'Course Activity',
107: 'cde' => 'Course Description',
108: 'cdo' => 'Course Domain',
109: 'cin' => 'Course Institutional Code',
110: 'cow' => "Course Owner's usename");
111: my ($name_code,$name_input);
112: if (defined($ENV{'form.cnameelement'}) && $ENV{'form.cnameelement'} ne '') {
113: $name_code = "opener.document.$ENV{'form.form'}.$ENV{'form.cnameelement'}.value=cdesc;";
114: $name_input ='<input type="hidden" name="cnameelement" value="'.
115: $ENV{'form.cnameelement'}.'" />';
116: }
117: my $submitopener = '';
118: my $autosubmit = '';
119: my $roleelement = '';
120: my $lastaction = 'self.close()';
121: if ($ENV{'form.form'} eq 'cu') {
122: $lastaction = 'document.courselist.pickedcourse.value = cdom+"_"+cname;'."\n".
123: 'document.courselist.submit();';
124: }
125: my $roledom = $ENV{'form.roleelement'};
126: if ($roledom) {
127: $roleelement = '<input type="hidden" name="roleelement" value="'.$roledom.'" />';
128: $submitopener = &Apache::lonroles::processpick($roledom);
129: $autosubmit = 'process_pick("'.$roledom.'")';
130: }
131: $r->print(<<ENDSCRIPT);
132: <script>
133: function gochoose(cname,cdom,cdesc) {
134: $name_code
135: var openerForm = "$ENV{'form.form'}";
136: opener.document.$ENV{'form.form'}.$ENV{'form.cnumelement'}.value=cname;
137: if (openerForm == 'cu' || openerForm == 'rolechoice') {
138: opener.document.$ENV{'form.form'}.$ENV{'form.cdomelement'}.value=cdom;
139: }
140: else {
141: var slct=opener.document.$ENV{'form.form'}.$ENV{'form.cdomelement'};
142: var i;
143: for (i=0;i<slct.length;i++) {
144: if (slct.options[i].value==cdom) { slct.selectedIndex=i; }
145: }
146: }
147: $autosubmit
148: $lastaction
149: }
150:
151: function setSections() {
152: var numSections = $num_sections
153: var sectionsArray = new Array("$seclist")
154: opener.document.$ENV{"form.form"}.currsec.length = 0
155: if (numSections == 0) {
156: opener.document.$ENV{"form.form"}.currsec.multiple=false
157: opener.document.$ENV{"form.form"}.currsec.size=1;
158: opener.document.$ENV{"form.form"}.currsec.options[0] = new Option('No existing sections','',false,false)
159: }
160: else {
161: if (numSections == 1) {
162: opener.document.$ENV{"form.form"}.currsec.multiple=false;
163: opener.document.$ENV{"form.form"}.currsec.size=1;
164: opener.document.$ENV{"form.form"}.currsec.options[0] = new Option('Select','',true,true);
165: opener.document.$ENV{"form.form"}.currsec.options[1] = new Option('No section','',false,false)
166: opener.document.$ENV{"form.form"}.currsec.options[2] = new Option(sectionsArray[0],sectionsArray[0],false,false);
167: }
168: else {
169: for (var i=0; i<numSections; i++) {
170: opener.document.$ENV{"form.form"}.currsec.options[i] = new Option(sectionsArray[i],sectionsArray[i],false,false)
171: }
172: opener.document.$ENV{"form.form"}.currsec.multiple=true
173: if (numSections < 3) {
174: opener.document.$ENV{"form.form"}.currsec.size=numSections;
175: }
176: else {
177: opener.document.$ENV{"form.form"}.currsec.size=3;
178: }
179: opener.document.$ENV{"form.form"}.currsec.options[0].selected = false
180: }
181: }
182: self.close()
183: }
184: </script>
185: $submitopener
186: <form method="post">
187: <input type="hidden" name="cnumelement" value="$ENV{'form.cnumelement'}" />
188: <input type="hidden" name="cdomelement" value="$ENV{'form.cdomelement'}" />
189: $name_input
190: <input type="hidden" name="form" value="$ENV{'form.form'}" />
191: $roleelement
192: $lt{'cac'}: $sincefilterform
193: <br />
194: $lt{'cdo'}: $domainselectform
195: <br />
196: $lt{'cin'}:
197: <input type="text" name="instcodefilter" size="10" value="$listinstcode" />
198: <br />
199: $lt{'cow'}:
200: <input type="text" name="ownerfilter" size="10" value="$listowner" />
201: <br />
202: $lt{'cde'}:
203: <input type="text" name="descriptfilter" size="40" value="$listdescript" />
204: <p><input type="submit" name="gosearch" value="Search" /></p>
205: </form>
206: <hr />
207: ENDSCRIPT
208: # ---------------------------------------------------------------- Get the data
209: if ($ENV{'form.gosearch'}) {
210: $r->print(&mt('Searching').' ...<br /> <br />');
211: $r->rflush();
212: unless ($descriptfilter) { $descriptfilter='.'; }
213: unless ($instcodefilter) { $instcodefilter='.'; }
214: unless ($ownerfilter) { $ownerfilter='.'; }
215: my $timefilter=($sincefilter==-1?1:time-$sincefilter);
216: my %courses=
217: &Apache::lonnet::courseiddump
218: ($domainfilter,$descriptfilter,$timefilter,$instcodefilter,$ownerfilter);
219: $r->print('<form name="courselist">');
220: my %by_descrip;
221: foreach my $course (keys %courses) {
222: my $descr;
223: if ($courses{$course} =~ m/^([^:]*):/) {
224: $descr = &Apache::lonnet::unescape($1);
225: } else {
226: $descr = &Apache::lonnet::unescape($courses{$course});
227: }
228: $by_descrip{lc($descr)}=$course;
229: }
230: foreach my $description (sort(keys(%by_descrip))) {
231: my $course=$by_descrip{$description};
232: my $cleandesc=&HTML::Entities::encode($description,'<>&"');
233: $cleandesc=~s/'/\\'/g;
234: my ($cdom,$cnum)=split(/\_/,$course);
235: $r->print('<input type="button" value="Select" onClick="gochoose('.
236: "'".$cnum."','".$cdom."','".$cleandesc."')".'" /> '.$description.' ('.
237: ($Apache::lonnet::domaindescription{$cdom}?
238: $Apache::lonnet::domaindescription{$cdom}:$cdom).
239: ")<br />\n");
240: }
241: if (!%courses) { $r->print(&mt('None found')); }
242: $r->print('<input type="hidden" name="form" value="'.$ENV{'form.form'}.'" />'."\n".
243: '<input type="hidden" name="pickedcourse" value="" />'."\n".
244: '<input type="hidden" name="cnumelement" value="'.$ENV{'form.cnumelement'}.'" />'."\n".
245: '<input type="hidden" name="cdomelement" value="'.$ENV{'form.cdomelement'}.'" />'."\n".
246: '</form>');
247: }
248: $r->print('</body></html>');
249: return OK;
250: }
251:
252: 1;
253: __END__
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