1: # The LearningOnline Network with CAPA
2: # lonselstudent.pm : Reusable subs for student selection.
3: #
4: # $Id: lonselstudent.pm,v 1.10 2007/11/01 19:56:39 albertel 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::lonselstudent;
30: use Apache::lonnet;
31: use Apache::lonlocal;
32: use Apache::loncoursedata();
33: use HTML::Entities();
34:
35: #
36: # Utility function used when rendering <student> tags.
37: # This function produces a list references to four
38: # arrays:
39: # (\@course_personel, \@current_members, \@expired_members, \@future_members)
40: #
41: #
42: # Parameters;
43: #
44: # restrict - Optional.. if present and defined should be a section name.
45: # The *_members arrays will then only contain people
46: # in that section
47: #
48: # Where:
49: # course_personnel - Each element of this array is itself a reference to an array
50: # containing information about a member of the course staff.
51: # current_members - Each element of this array is itself a reference to an
52: # array that contains information about current students in
53: # the course.
54: # expired_members - Each element of this array is itself a reference to an
55: # array that contains information about students whose
56: # status has expired.
57: # future_members - Each element of this arrya is itself a reference to an
58: # array that contains information about students who will
59: # become active at a future date.
60: #
61: # Course personnel elements include:
62: # [0] Last, First of the user.
63: # [1] Role held by the user.
64: # [2] Empty.
65: # [3] Empty
66: # [4] username:domain of the user.
67: #
68: # Student member array elements are:
69: # [0] Last, First of the user.
70: # [1] Status of the user one of ("Active", "Future", or "Expired')
71: # depending on which array the user was put in.
72: # [2] Section the student is in.
73: # [3] Role of the member (student).
74: # [4] username:domain of the user.
75: #
76: sub get_people_in_class {
77: my ($section_restriction) = @_;
78: my %coursepersonnel = &Apache::lonnet::get_course_adv_roles();
79: #
80: # Enumerate the course_personnel.
81: #
82: my @course_personnel;
83: for my $role (sort(keys(%coursepersonnel))) {
84: # extract the names so we can sort them
85: my @people;
86: for my $person (split(/,/, $coursepersonnel{$role})) {
87: my ($uname,$domain) = split(/:/, $person);
88: push(@people, [&Apache::loncommon::plainname($uname,$domain),
89: $uname,$domain]);
90: }
91: @people = sort { $a->[0] cmp $b->[0] } (@people);
92:
93: for my $person (@people) {
94: push(@course_personnel, [join(':', $person->[1],$person->[2]),
95: $person->[0], '', '', $role]);
96: }
97: }
98: # Students must be split into the three categories:
99:
100: my @current_members;
101: my @future_members;
102: my @expired_members;
103:
104: # Indices into the coures data elements.
105:
106: my $section = &Apache::loncoursedata::CL_SECTION();
107: my $fullname = &Apache::loncoursedata::CL_FULLNAME();
108: my $status = &Apache::loncoursedata::CL_STATUS();
109: my $start_date = &Apache::loncoursedata::CL_START();
110:
111:
112: my $classlist = &Apache::loncoursedata::get_classlist();
113: my @keys = keys(%{$classlist});
114: # Sort by: Section, name
115: @keys = sort {
116: lc($classlist->{$a}[$section]) cmp lc($classlist->{$b}[$section]) ||
117: lc($classlist->{$a}[$fullname]) cmp lc($classlist->{$b}[$fullname]) ||
118: lc($a) cmp lc($b)
119: } (@keys);
120:
121:
122:
123:
124: for my $user (@keys) {
125: if (!$section_restriction ||
126: ($section_restriction eq $classlist->{$user}->[$section])) {
127:
128: if ( $classlist->{$user}->[$status] eq
129: 'Active') {
130: push(@current_members, [$user, $classlist->{$user}->[$fullname],
131: $classlist->{$user}->[$section],
132: $classlist->{$user}->[$status], 'Student']);
133: } else {
134: # Need to figure out if this user is future or
135: # Expired... If the start date is in the future
136: # the user is future...else expired.
137:
138: my $now = time;
139: if ($classlist->{$user}->[$start_date] > $now) {
140: push(@future_members, [$user, $classlist->{$user}->[$fullname],
141: $classlist->{$user}->[$section],
142: "Future", "Student"]);
143: } else {
144: push(@expired_members, [$user,
145: $classlist->{$user}->[$fullname],
146: $classlist->{$user}->[$section],
147: "Expired", "Student"]);
148: }
149:
150: }
151: }
152: }
153: return (\@course_personnel,
154: \@current_members,
155: \@expired_members,
156: \@future_members);
157:
158: }
159:
160: #
161: # Utility function used when rendering the <student> tag.
162: # This function renders a segment of course personel
163: # Personel are broken up by the helper into past, current and
164: # future...each one gets is own subpage of selection.
165: # This sub renders one of these pages.
166: # Parameters:
167: # $students - Students in the section. (ref to array of references
168: # to arrays).
169: # $formname - Name of the form in which this stuff gets rendered.
170: # $formprefix - form path prefix for form element names
171: # This is used to make each form element
172: # so that the segments having to do with each
173: # set of students won't collide.
174: # $defaultusers - reference to a hash containng
175: # the set of users that should be on or off.
176: # $multiselect - True if multiselect allowed.
177: # $resultname - Name of result variable.
178: # $javascript - If true, the javascript to run this is output
179: # This should be true for the first call for a page
180: # and false for all other calls... only matters if
181: # multiselect is true.
182: # Returns:
183: # HTML text to add to the rendering of the helper.
184: #
185: sub render_student_list {
186: my ($students, $formname, $formprefix, $defaultusers,
187: $multiselect, $resultname, $javascript) = @_;
188:
189: my $result = "";
190:
191: # no students so no output
192: return if (!@$students);
193:
194: if ($javascript && $multiselect) {
195: $result .= <<SCRIPT;
196: <script type="text/javascript">
197: // <!--
198:
199: function findElement(name) {
200: var i;
201: var ele;
202: for(i =0; i < document.forms.$formname.elements.length; i++) {
203: ele = document.forms.$formname.elements[i];
204: if(ele.name == name) {
205: return ele;
206: }
207: }
208: return null;
209: }
210: function isStudent(element) {
211: if(element.value.indexOf(":Student") != -1) {
212: return 1;
213: }
214: return 0;
215: }
216: function section(element) {
217: var i;
218: var info;
219: if (element.value.indexOf(':') != -1) {
220: info = element.value.split(':');
221: return info[2];
222: } else {
223: return "";
224: }
225: }
226: function rightSubForm(element, which) {
227: if (element.value.indexOf(which) != -1) {
228: return true;
229: } else {
230: return false;
231: }
232: }
233:
234: function setAllStudents(value, which) {
235: var i;
236: var ele;
237: for (i =0; i < document.forms.$formname.elements.length; i++) {
238: ele = document.forms.$formname.elements[i];
239: if(isStudent(ele) && rightSubForm(ele, which)) {
240: ele.checked=value;
241: }
242: }
243: }
244: function setAllCoursePersonnel(value, which) {
245: var i;
246: var ele;
247: for (i =0; i < document.forms.$formname.elements.length; i++) {
248: ele = document.forms.$formname.elements[i];
249: if(!isStudent(ele) && rightSubForm(ele, which)) {
250: ele.checked = value;
251: }
252: }
253: }
254: function setSection(which, value, subform) {
255: var i;
256: var ele;
257: for (i =0; i < document.forms.$formname.elements.length; i++) {
258: ele = document.forms.$formname.elements[i];
259: if (ele.value.indexOf(':') != -1) {
260: if ((section(ele) == which) && rightSubForm(ele, subform)) {
261: ele.checked = value;
262: }
263: }
264: }
265: }
266:
267: function setCheckboxes(listbox, which, value) {
268: var k;
269: var elem;
270: var what;
271: elem = findElement(listbox);
272: if (elem != null) {
273: for (k = 0; k < elem.length; k++) {
274: if (elem.options[k].selected) {
275: what = elem.options[k].value;
276: if (what == 'allstudents') {
277: setAllStudents(value, which);
278: } else if (what == 'allpersonnel') {
279: setAllCoursePersonnel(value, which);
280: } else if (what == 'nosection') {
281: setSection('',value, which);
282: } else {
283: setSection(what, value, which);
284: }
285: }
286: }
287: }
288: }
289: function selectSections(listbox, which) {
290: setCheckboxes(listbox, which, true);
291:
292: }
293: function unselectSections(listbox, which) {
294: setCheckboxes(listbox, which, false);
295: }
296:
297: // -->
298: </script>
299: SCRIPT
300:
301: }
302:
303: # If multiple selections are allowed, we have a listbox
304: # at the top which allows quick selections from each section
305: # as well as from categories of personnel.
306:
307: if ($multiselect) {
308: # Make a section hash so we can add sections to the choice:
309:
310: my %sections;
311: for my $student (@$students) {
312: my $sect = $student->[2];
313: if ($sect ne "") {
314: $sections{$sect} = 1;
315: }
316: }
317:
318: $result .= '<table><tr><td>';
319:
320: my $size = scalar(keys(%sections));
321: $size += 3; # We have allstudents allpersonel nosection too.
322: if ($size > 5) {
323: $size = 5;
324: }
325: $result .= '<select multiple name="'.$formprefix
326: .'.chosensections" size="'.$size.'">'."\n";
327: $result .= '<option value="allstudents">'.&mt('All Students').'</option>';
328: $result .= '<option value="allpersonnel">'.&mt('All Course Personnel').'</option>';
329: $result .= '<option value="nosection">'.&mt('No Section').'</option>';
330: $result .= "\n";
331: foreach my $sec (sort {lc($a) cmp lc($b)} (keys(%sections))) {
332: $result .= '<option name="'.$sec.'">'.$sec.'</option>'."\n";
333: }
334: $result .= '</td><td valign="top">';
335: $result .= '<input type="button" name="'.$formprefix.'.select" value="'.'Select" onclick='
336: ."'selectSections(\"$formprefix.chosensections\", \"$formprefix\")'".' /></td>';
337: $result .= '<td valign="top"><input type="button" name="'.$formprefix
338: .'.unselect" value="'.&mt('Unselect').'" onclick='.
339: "'unselectSections(\"$formprefix.chosensections\", \"$formprefix\")' ".' /></td></tr></table>';
340: }
341:
342: # Now we list the students, but the form element type
343: # will depend on whether or not multiselect is true.
344: # True -> checkboxes.
345: # False -> radiobuttons.
346:
347: $result .= &Apache::loncommon::start_data_table();
348: $result .= &Apache::loncommon::start_data_table_header_row();
349: $result .= '<th></th><th>'.&mt('Name').'</th>'."\n";
350: $result .= ' <th>'.&mt('Section').'</th>'."\n";
351: $result .= ' <th>'.&mt('Status').'</th>'."\n";
352: $result .= ' <th>'.&mt('Role').'</th>'."\n";
353: $result .= ' <th>'.&mt('Username : Domain').'</th>'."\n";
354: $result .= &Apache::loncommon::end_data_table_header_row();
355:
356: my $input_type;
357: if ($multiselect) {
358: $input_type = "checkbox";
359: } else {
360: $input_type = "radio";
361: }
362:
363: my $checked = 0;
364: for my $student (@$students) {
365: $result .= &Apache::loncommon::start_data_table_row().
366: '<td><input type="'.$input_type.'" name="'.
367: $resultname."_forminput".'"';
368: my $user = $student->[0];
369:
370: # Figure out which students are checked by default...
371:
372: if (%$defaultusers) {
373: if (exists ($defaultusers->{$user})) {
374: $result .= ' checked ="checked" ';
375: $checked = 1;
376: }
377: } elsif (!$multiselect && !$checked) {
378: $result .= ' checked="checked" ';
379: $checked = 1; # First one for radio if no default specified.
380: }
381: $result .= ' value="'.&HTML::Entities::encode($user . ':'
382: .$student->[2] . ':'
383: .$student->[1] . ':'
384: .$student->[3] . ':'
385: .$student->[4] . ":"
386: .$formprefix, "<>&\"'")
387: ."\" /></td><td>\n";
388: $result .= &HTML::Entities::encode($student->[1], '<>&"')
389: . '</td><td align="center" >'."\n";
390: $result .= &HTML::Entities::encode($student->[2], '<>&"')
391: . '</td><td align="center">'."\n";
392: $result .= &HTML::Entities::encode($student->[3], '<>&"')
393: . '</td><td align="center">'."\n";
394: $result .= &HTML::Entities::encode($student->[4], '<>&"')
395: . '</td><td align="center">'."\n";
396: $result .= &HTML::Entities::encode($student->[0], '<>&"')
397: . '</td>'.&Apache::loncommon::end_data_table_row().
398: "\n";
399: }
400: $result .= &Apache::loncommon::end_data_table().
401: " <br /> <hr />\n";
402:
403: return $result;
404: }
405:
406: 1;
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