1: # The LearningOnline Network with CAPA
2: # lonselstudent.pm : Reusable subs for student selection.
3: #
4: # $Id: lonselstudent.pm,v 1.1 2006/05/11 21:10:21 foxr 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::loncoursedata;
32: use HTML::Entities;
33:
34: #
35: # Utility function used when rendering <student> tags.
36: # This function produces a list references to four
37: # arrays:
38: # (\@course_personel, \@current_members, \@expired_members, \@future_members)
39: #
40: # Where:
41: # course_personnel - Each element of this array is itself a reference to an array
42: # containing information about a member of the course staff.
43: # current_members - Each element of this array is itself a reference to an
44: # array that contains information about current students in
45: # the course.
46: # expired_members - Each element of this array is itself a reference to an
47: # array that contains information about students whose
48: # status has expired.
49: # future_members - Each element of this arrya is itself a reference to an
50: # array that contains information about students who will
51: # become active at a future date.
52: #
53: # Course personnel elements include:
54: # [0] Last, First of the user.
55: # [1] Role held by the user.
56: # [2] Empty.
57: # [3] Empty
58: # [4] username:domain of the user.
59: #
60: # Student member array elements are:
61: # [0] Last, First of the user.
62: # [1] Status of the user one of ("Active", "Future", or "Expired')
63: # depending on which array the user was put in.
64: # [2] Section the student is in.
65: # [3] Role of the member (student).
66: # [4] username:domain of the user.
67: #
68: sub get_people_in_class {
69: my %coursepersonnel = &Apache::lonnet::get_course_adv_roles();
70: #
71: # Enumerate the course_personnel.
72: #
73: my @course_personnel;
74: for (sort keys %coursepersonnel) {
75: for my $role (split /,/, $coursepersonnel{$_}) {
76: # extract the names so we can sort them
77: my @people;
78:
79: for (split /,/, $role) {
80: push @people, [split /:/, $role];
81: }
82:
83: @people = sort { $a->[0] cmp $b->[0] } @people;
84:
85: for my $person (@people) {
86: push @course_personnel, [join(':', @$person), $person->[0], '', $_];
87: }
88: }
89: }
90: # Students must be split into the three categories:
91:
92: my @current_members;
93: my @future_members;
94: my @expired_members;
95:
96: # Indices into the coures data elements.
97:
98: my $section = &Apache::loncoursedata::CL_SECTION();
99: my $fullname = &Apache::loncoursedata::CL_FULLNAME();
100: my $status = &Apache::loncoursedata::CL_STATUS();
101: my $start_date = &Apache::loncoursedata::CL_START();
102:
103:
104: my $classlist = &Apache::loncoursedata::get_classlist();
105: my @keys = keys %{$classlist};
106: # Sort by: Section, name
107: @keys = sort {
108: if ($classlist->{$a}->[$section] ne $classlist->{$b}->[$section]) {
109: return $classlist->{$a}->[$section] cmp $classlist->{$b}->[$section];
110: }
111: return $classlist->{$a}->[$fullname] cmp $classlist->{$b}->[$fullname];
112: } @keys;
113:
114:
115:
116:
117: for (@keys) {
118:
119: if ( $classlist->{$_}->[$status] eq
120: 'Active') {
121: push @current_members, [$_, $classlist->{$_}->[$fullname],
122: $classlist->{$_}->[$section],
123: $classlist->{$_}->[$status], 'Student'];
124: } else {
125: # Need to figure out if this user is future or
126: # Expired... If the start date is in the future
127: # the user is future...else expired.
128:
129: my $now = time;
130: if ($classlist->{$_}->[$start_date] > $now) {
131: push @future_members, [$_, $classlist->{$_}->[$fullname],
132: $classlist->{$_}->[$section],
133: "Future", "Student"];
134: } else {
135: push @expired_members, [$_, $classlist->{$_}->[$fullname],
136: $classlist->{$_}->[$section],
137: "Expired", "Student"];
138: }
139:
140: }
141: }
142: return (\@course_personnel,
143: \@current_members,
144: \@expired_members,
145: \@future_members);
146:
147: }
148:
149: #
150: # Utility function used when rendering the <student> tag.
151: # This function renders a segment of course personel
152: # Personel are broken up by the helper into past, current and
153: # future...each one gets is own subpage of selection.
154: # This sub renders one of these pages.
155: # Parameters:
156: # $students - Students in the section. (ref to array of references
157: # to arrays).
158: # $formprefix - form path prefix for form element names
159: # This is used to make each form element
160: # so that the segments having to do with each
161: # set of students won't collide.
162: # $defaultusers - reference to a hash containng
163: # the set of users that should be on or off.
164: # $multiselect - True if multiselect allowed.
165: # $resultname - Name of result variable.
166: # $javascript - If true, the javascript to run this is output
167: # This should be true for the first call for a page
168: # and false for all other calls... only matters if
169: # multiselect is true.
170: # Returns:
171: # HTML text to add to the rendering of the helper.
172: #
173: sub render_student_list {
174: my ($students, $formprefix, $defaultusers,
175: $multiselect, $resultname, $javascript) = @_;
176:
177: my $result = "";
178:
179: if ($javascript && $multiselect) {
180: $result .= <<SCRIPT;
181: <script type="text/javascript">
182: // <!--
183:
184: function findElement(name) {
185: var i;
186: var ele;
187: for(i =0; i < document.forms.helpform.elements.length; i++) {
188: ele = document.forms.helpform.elements[i];
189: if(ele.name == name) {
190: return ele;
191: }
192: }
193: return null;
194: }
195: function isStudent(element) {
196: if(element.value.indexOf(":Student") != -1) {
197: return 1;
198: }
199: return 0;
200: }
201: function section(element) {
202: var i;
203: var info;
204: if (element.value.indexOf(':') != -1) {
205: info = element.value.split(':');
206: return info[2];
207: } else {
208: return "";
209: }
210: }
211: function rightSubForm(element, which) {
212: if (element.value.indexOf(which) != -1) {
213: return true;
214: } else {
215: return false;
216: }
217: }
218:
219: function setAllStudents(value, which) {
220: var i;
221: var ele;
222: for (i =0; i < document.forms.helpform.elements.length; i++) {
223: ele = document.forms.helpform.elements[i];
224: if(isStudent(ele) && rightSubForm(ele, which)) {
225: ele.checked=value;
226: }
227: }
228: }
229: function setAllCoursePersonnel(value, which) {
230: var i;
231: var ele;
232: for (i =0; i < document.forms.helpform.elements.length; i++) {
233: ele = document.forms.helpform.elements[i];
234: if(!isStudent(ele) && rightSubForm(ele, which)) {
235: ele.checked = value;
236: }
237: }
238: }
239: function setSection(which, value, subform) {
240: var i;
241: var ele;
242: for (i =0; i < document.forms.helpform.elements.length; i++) {
243: ele = document.forms.helpform.elements[i];
244: if (ele.value.indexOf(':') != -1) {
245: if ((section(ele) == which) && rightSubForm(ele, subform)) {
246: ele.checked = value;
247: }
248: }
249: }
250: }
251:
252: function setCheckboxes(listbox, which, value) {
253: var k;
254: var elem;
255: var what;
256: elem = findElement(listbox);
257: if (elem != null) {
258: for (k = 0; k < elem.length; k++) {
259: if (elem.options[k].selected) {
260: what = elem.options[k].text;
261: if (what == 'All Students') {
262: setAllStudents(value, which);
263: } else if (what == 'All Course Personnel') {
264: setAllCoursePersonnel(value, which);
265: } else if (what == 'No Section') {
266: setSection('',value, which);
267: } else {
268: setSection(what, value, which);
269: }
270: }
271: }
272: }
273: }
274: function selectSections(listbox, which) {
275: setCheckboxes(listbox, which, true);
276:
277: }
278: function unselectSections(listbox, which) {
279: setCheckboxes(listbox, which, false);
280: }
281:
282: // -->
283: </script>
284: SCRIPT
285:
286: }
287:
288: # If multiple selections are allowed, we have a listbox
289: # at the top which allows quick selections from each section
290: # as well as from categories of personnel.
291:
292: if ($multiselect) {
293: # Make a section hash so we can add sections to the choice:
294:
295: my %sections;
296: for my $student (@$students) {
297: my $sect = $student->[2];
298: if ($sect ne "") {
299: $sections{$sect} = 1;
300: }
301: }
302:
303: $result .= '<table><tr><td>';
304:
305: my $size = scalar(keys(%sections));
306: $size += 3; # We have allstudents allpersonel nosection too.
307: if ($size > 5) {
308: $size = 5;
309: }
310: $result .= '<select multiple name="'.$formprefix
311: .'.chosensections" size="'.$size.'">'."\n";
312: $result .= '<option name="allstudents">All Students</option>';
313: $result .= '<option name="allpersonnel">All Course Personnel</option>';
314: $result .= '<option name="nosection">No Section</option>';
315: $result .= "\n";
316: foreach my $sec (sort {lc($a) cmp lc($b)} (keys(%sections))) {
317: $result .= '<option name="'.$sec.'">'.$sec.'</option>'."\n";
318: }
319: $result .= '</td><td valign="top">';
320: $result .= '<input type="button" name="'.$formprefix.'.select" value="Select" onclick='
321: ."'selectSections(\"$formprefix.chosensections\", \"$formprefix\")'".' /></td>';
322: $result .= '<td valign="top"><input type="button" name="'.$formprefix
323: .'.unselect" value="Unselect" onclick='.
324: "'unselectSections(\"$formprefix.chosensections\", \"$formprefix\")' ".' /></td></tr></table>';
325: }
326:
327: # Now we list the students, but the form element type
328: # will depend on whether or not multiselect is true.
329: # True -> checkboxes.
330: # False -> radiobuttons.
331:
332: $result .= "<table border=\"2\">\n";
333: $result .= '<tr><th></th><th align="center">Name</th>'."\n";
334: $result .= ' <th align="center">Section</th>'."\n";
335: $result .= ' <th align="center">Status</th>'."\n";
336: $result .= ' <th align="center">Role</th>'."\n";
337: $result .= ' <th align="center">Username : Domain</th></tr>'."\n";
338:
339: my $input_type;
340: if ($multiselect) {
341: $input_type = "checkbox";
342: } else {
343: $input_type = "radio";
344: }
345:
346: my $checked = 0;
347: for my $student (@$students) {
348: $result .= '<tr><td><input type="'.$input_type.'" name="'.
349: $resultname.".forminput".'"';
350: my $user = $student->[0];
351:
352: # Figure out which students are checked by default...
353:
354: if(%$defaultusers) {
355: if (exists ($defaultusers->{$user})) {
356: $result .= ' checked ="checked" ';
357: $checked = 1;
358: }
359: } elsif (!$multiselect && !$checked) {
360: $result .= ' checked="checked" ';
361: $checked = 1; # First one for radio if no default specified.
362: }
363: $result .= ' value="'. HTML::Entities::encode($user . ':'
364: .$student->[2] . ':'
365: .$student->[1] . ':'
366: .$student->[3] . ':'
367: .$student->[4] . ":"
368: .$formprefix, "<>&\"'")
369: ."\" /></td><td>\n";
370: $result .= HTML::Entities::encode($student->[1], '<>&"')
371: . '</td><td align="center" >'."\n";
372: $result .= HTML::Entities::encode($student->[2], '<>&"')
373: . '</td><td align="center">'."\n";
374: $result .= HTML::Entities::encode($student->[3], '<>&"')
375: . '</td><td align="center">'."\n";
376: $result .= HTML::Entities::encode($student->[4], '<>&"')
377: . '</td><td align="center">'."\n";
378: $result .= HTML::Entities::encode($student->[0], '<>&"')
379: . '</td></tr>'."\n";
380: }
381: $result .=" </table> <br /> <hr />\n";
382:
383: return $result;
384: }
385:
386: 1;
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