Annotation of loncom/interface/spreadsheet/lonspreadsheet.pm, revision 1.17
1.1 matthew 1: #
1.17 ! matthew 2: # $Id: lonspreadsheet.pm,v 1.16 2003/07/16 13:52:19 matthew Exp $
1.1 matthew 3: #
4: # Copyright Michigan State University Board of Trustees
5: #
6: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
7: #
8: # LON-CAPA is free software; you can redistribute it and/or modify
9: # it under the terms of the GNU General Public License as published by
10: # the Free Software Foundation; either version 2 of the License, or
11: # (at your option) any later version.
12: #
13: # LON-CAPA is distributed in the hope that it will be useful,
14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: # GNU General Public License for more details.
17: #
18: # You should have received a copy of the GNU General Public License
19: # along with LON-CAPA; if not, write to the Free Software
20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: #
22: # /home/httpd/html/adm/gpl.txt
23: #
24: # http://www.lon-capa.org/
25: #
26: # The LearningOnline Network with CAPA
27: # Spreadsheet/Grades Display Handler
28: #
29: # POD required stuff:
30:
31: =head1 NAME
32:
33: lonspreadsheet
34:
35: =head1 SYNOPSIS
36:
37: Spreadsheet interface to internal LON-CAPA data
38:
39: =head1 DESCRIPTION
40:
41: Lonspreadsheet provides course coordinators the ability to manage their
42: students grades online. The students are able to view their own grades, but
43: not the grades of their peers. The spreadsheet is highly customizable,
44: offering the ability to use Perl code to manipulate data, as well as many
45: built-in functions.
46:
47: =head2 Functions available to user of lonspreadsheet
48:
49: =over 4
50:
51: =cut
52:
53:
54: package Apache::lonspreadsheet;
55:
56: use strict;
57: use Apache::classcalc();
58: use Apache::studentcalc();
59: use Apache::assesscalc();
60: use Apache::Constants qw(:common :http);
61: use Apache::lonnet;
62: use Apache::lonhtmlcommon;
63: use HTML::Entities();
64:
65: ##
66: ## HTML utility subroutines really should go in lonhtmlcommon
67: ##
68:
69: sub textfield {
70: my ($title,$name,$value)=@_;
71: return "\n<p><b>$title:</b><br>".
72: '<input type=text name="'.$name.'" size=80 value="'.$value.'">';
73: }
74:
75: sub hiddenfield {
76: my ($name,$value)=@_;
77: return '<input type=hidden name="'.$name.'" value="'.$value.'" />'."\n";
78: }
79:
80: sub selectbox {
81: my ($title,$name,$value,%options)=@_;
82: my $selout="\n<p><b>$title:</b><br>".'<select name="'.$name.'">';
83: foreach (sort keys(%options)) {
84: $selout.='<option value="'.$_.'"';
85: if ($_ eq $value) { $selout.=' selected'; }
86: $selout.='>'.$options{$_}.'</option>';
87: }
88: return $selout.'</select>';
89: }
90:
1.5 matthew 91: sub file_dialogs {
92: my ($spreadsheet) = @_;
93: my $bgcolor = "#FFFFFF";
94: my $sheettype = $spreadsheet->{'type'};
95: my $result = '';
1.11 matthew 96: my $message = '';
1.5 matthew 97: ##
98: ## Deal with saving the spreadsheet
1.11 matthew 99: if ((exists($ENV{'form.save'}) || exists($ENV{'form.makedefault'})) &&
1.5 matthew 100: exists($ENV{'form.savefilename'})) {
101: $spreadsheet->filename($ENV{'form.savefilename'});
102: my $save_status = $spreadsheet->save();
103: if ($save_status ne 'ok') {
1.11 matthew 104: $message .= "An error occurred while saving the spreadsheet".
1.5 matthew 105: "There error is:".$save_status;
106: return $result;
107: } else {
1.11 matthew 108: $message .= "Spreadsheet saved as ".$ENV{'form.savefilename'};
1.5 matthew 109: }
110: } elsif (exists($ENV{'form.newformula'}) &&
111: exists($ENV{'form.cell'}) &&
112: $ENV{'form.cell'} ne '' ) {
113: ##
114: ## Make any requested modifications to the spreadsheet
115: $spreadsheet->modify_cell($ENV{'form.cell'},
116: $ENV{'form.newformula'});
117: $spreadsheet->save_tmp();
118: # output that we are dealing with a temporary file
119: $result .=&hiddenfield('workcopy',$sheettype);
1.11 matthew 120: if ($ENV{'form.newformula'} !~ /^\s*$/) {
121: $message .='<table><tr>'.
122: '<td valign="top"><pre>Cell '.$ENV{'form.cell'}.' = </pre></td>'.
123: '<td><pre>'.$ENV{'form.newformula'}."</pre></td></tr></table>\n";
124: } else {
125: $message .= 'Deleted contents of cell '.$ENV{'form.cell'}.'.';
126: }
1.5 matthew 127: }
128: ##
129: ## Editing code
130: $result .=&hiddenfield('cell','').
131: &hiddenfield('newformula','');
132: ##
133: ## Create the save and load dialogs
134: my $filename = $spreadsheet->filename();
1.10 matthew 135: my $truefilename = $filename;
136: if ($spreadsheet->is_default()) {
137: $filename = 'Default';
138: }
1.5 matthew 139: my $save_dialog = '<nobr>'.
140: '<input type="submit" name="save" value="Save as" /> '.
141: '<input type="text" name="savefilename" size="30" value="'.
1.10 matthew 142: $truefilename.'" />'.
1.5 matthew 143: '</nobr>';
144: my $makedefault_dialog = '<input type="submit" name="makedefault" '.
1.11 matthew 145: 'value="Save as & Make This Sheet the Default"/>';
1.5 matthew 146: #
147: my $link = '<a href="javascript:openbrowser'.
1.9 www 148: "('sheet','loadfilename','spreadsheet')\">Select Spreadsheet File</a>";
1.5 matthew 149: my $load_dialog = <<END;
150: <table bgcolor="$bgcolor">
151: <tr><td><input type="submit" name="load" value="Load" /></td>
152: <td><nobr>
1.10 matthew 153: <input type="text" name="loadfilename" size="20" value="$filename" />
1.5 matthew 154: $link</nobr>
155: </td></tr>
156: <tr><td> </td><td>
157: <select name="fileselect" onchange="document.sheet.loadfilename.value=document.sheet.fileselect.value" >
158: END
1.7 matthew 159: my $default_filename_set = 0;
1.5 matthew 160: foreach my $sheetfilename ($spreadsheet->othersheets()) {
161: $load_dialog .= ' <option name="'.$sheetfilename.'"';
162: if ($filename eq $sheetfilename) {
163: $load_dialog .= ' selected';
1.7 matthew 164: $default_filename_set = 1;
1.5 matthew 165: }
166: $load_dialog .= '>'.$sheetfilename."</option>\n";
167: }
168: $load_dialog .= "</td><td> </td></tr>\n</table>\n";
169: #
170: $result .=<<END;
171: <!-- load / save dialogs -->
172: <table cellspacing="2">
173: <tr>
174: <td>$load_dialog</td>
175: <td>
176: <table bgcolor="$bgcolor">
177: <tr><td>$save_dialog</td></tr>
178: <tr><td align="center">$makedefault_dialog</td></tr>
179: </table>
180: </td>
181: </tr>
182: </table>
183: END
1.11 matthew 184: return ($result,$message);
1.5 matthew 185: }
186:
1.1 matthew 187: sub handler {
188: my $r=shift;
189: #
190: # Overload checking
191: #
192: # Check this server
193: my $loaderror=&Apache::lonnet::overloaderror($r);
194: if ($loaderror) { return $loaderror; }
195: # Check the course homeserver
196: $loaderror= &Apache::lonnet::overloaderror($r,
197: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1.4 matthew 198: # if ($loaderror) { return $loaderror; }
1.1 matthew 199: #
200: # HTML Header
201: #
202: if ($r->header_only) {
203: $r->content_type('text/html');
204: $r->send_http_header;
205: return OK;
206: }
207: #
208: # Roles Checking
209: #
210: # Needs to be in a course
211: if (! $ENV{'request.course.fn'}) {
212: # Not in a course, or not allowed to modify parms
213: $ENV{'user.error.msg'}=
214: $r->uri.":opa:0:0:Cannot modify spreadsheet";
215: return HTTP_NOT_ACCEPTABLE;
1.17 ! matthew 216: }
! 217: my $courseid = $ENV{'request.course.id'};
! 218: #
! 219: # Do not allow students to continue if standard grading is in effect.
! 220: if ($ENV{'request.role'} =~ /^st\./) {
! 221: if ($ENV{'course.'.$courseid.'.grading'} eq 'standard') {
! 222: return HTTP_NOT_ACCEPTABLE;
! 223: }
1.1 matthew 224: }
225: #
226: # Get query string for limited number of parameters
227: #
228: &Apache::loncommon::get_unprocessed_cgi
229: ($ENV{'QUERY_STRING'},['sname','sdomain','usymb','filename']);
230: #
231: # Deal with restricted student permissions
232: #
233: if ($ENV{'request.role'} =~ /^st\./) {
234: delete $ENV{'form.cell'} if (exists($ENV{'form.cell'}));
235: delete $ENV{'form.newformula'} if (exists($ENV{'form.newformula'}));
236: }
237: #
238: # Determine basic information about the spreadsheet
239: my ($sheettype) = ($r->uri=~/\/(\w+)$/);
240: #
241: my $symb = undef;
242: $symb = $ENV{'form.usymb'} if (exists($ENV{'form.usymb'}));
243: my $name = $ENV{'user.name'};
244: my $domain = $ENV{'user.domain'};
245: if (exists($ENV{'form.sname'})) {
246: $name = $ENV{'form.sname'};
247: $domain = $ENV{'form.sdomain'};
248: }
1.3 matthew 249: ##
250: ## Check permissions
251: my $allowed_to_edit = &Apache::lonnet::allowed('mgr',
252: $ENV{'request.course.id'});
1.12 matthew 253: # Only those instructors/tas/whatevers with complete access
254: # (not section restricted) are able to modify spreadsheets.
1.3 matthew 255: my $allowed_to_view = &Apache::lonnet::allowed('vgr',
256: $ENV{'request.course.id'});
1.12 matthew 257: if (! $allowed_to_view) {
258: $allowed_to_view = &Apache::lonnet::allowed('vgr',
259: $ENV{'request.course.id'}.'/'.$ENV{'request.course.sec'});
260: # Those who are restricted by section are allowed to view.
261: # The routines in lonstatistics which decide which students'
262: # will be shown take care of the restriction by section.
263: }
1.1 matthew 264: #
1.3 matthew 265: # Only those able to view others grades will be allowed to continue
266: # if they are not requesting their own.
1.12 matthew 267: if ($sheettype eq 'classcalc') {
1.3 matthew 268: if (! $allowed_to_view) {
1.14 www 269: $ENV{'user.error.msg'}=
270: $r->uri.":vgr:0:0:Access Permission Denied";
271: return HTTP_NOT_ACCEPTABLE;
272: }
1.1 matthew 273: }
1.12 matthew 274: if ((($name ne $ENV{'user.name'} ) ||
275: ($domain ne $ENV{'user.domain'})) && $sheettype ne 'classcalc') {
276: # Check that the student is in their section?
277: if (exists($ENV{'request.course.sec'}) &&
278: $ENV{'request.course.sec'} ne '' ) {
279: my $stu_sec = &Apache::lonnet::usection($domain,$name,
280: $ENV{'request.course.id'});
281: if ($stu_sec ne $ENV{'request.course.sec'}) {
1.14 www 282: $ENV{'user.error.msg'}=
283: $r->uri.":vgr:0:0:Requested student not in your section.";
284: return HTTP_NOT_ACCEPTABLE;
1.12 matthew 285: }
286: }
287: }
1.14 www 288:
289: #
290: # Open page, try to prevent browser cache.
291: #
292: $r->content_type('text/html');
1.15 matthew 293: &Apache::loncommon::no_cache($r);
1.14 www 294: $r->send_http_header;
1.12 matthew 295:
1.1 matthew 296: #
297: # Header....
298: #
299: $r->print('<html><head><title>LON-CAPA Spreadsheet</title>');
300: my $nothing = &Apache::lonhtmlcommon::javascript_nothing();
301: ##
302: ## Spit out the javascript required for editing
303: ##
1.5 matthew 304: if ($allowed_to_edit) {
305: my $extra_javascript =
306: &Apache::loncommon::browser_and_searcher_javascript();
1.1 matthew 307: $r->print(<<ENDSCRIPT);
308: <script language="JavaScript">
309:
1.5 matthew 310: $extra_javascript
311:
1.1 matthew 312: var editwin;
313:
314: function celledit(cellname,cellformula) {
315: var edit_text = '';
316: // cellformula may contain less-than and greater-than symbols, so
317: // we need to escape them?
318: edit_text +='<html><head><title>Cell Edit Window</title></head><body>';
319: edit_text += '<form name="editwinform">';
320: edit_text += '<center><h3>Cell '+cellname+'</h3>';
321: edit_text += '<textarea name="newformula" cols="40" rows="6"';
322: edit_text += ' wrap="off" >'+cellformula+'</textarea>';
323: edit_text += '</br>';
324: edit_text += '<input type="button" name="accept" value="Accept"';
325: edit_text += ' onClick=\\\'javascript:';
326: edit_text += 'opener.document.sheet.cell.value=';
327: edit_text += '"'+cellname+'";';
328: edit_text += 'opener.document.sheet.newformula.value=';
329: edit_text += 'document.editwinform.newformula.value;';
330: edit_text += 'opener.document.sheet.submit();';
331: edit_text += 'self.close()\\\' />';
332: edit_text += ' ';
333: edit_text += '<input type="button" name="abort" ';
334: edit_text += 'value="Discard Changes"';
335: edit_text += ' onClick="javascript:self.close()" />';
336: edit_text += '</center></body></html>';
337:
338: if (editwin != null && !(editwin.closed) ) {
339: editwin.close();
340: }
341:
342: editwin = window.open($nothing,'CellEditWin','height=200,width=350,scrollbars=no,resizeable=yes,alwaysRaised=yes,dependent=yes',true);
343: editwin.document.write(edit_text);
344: }
345: </script>
346: ENDSCRIPT
347: }
348: $r->print('</head>'.&Apache::loncommon::bodytag('Grades Spreadsheet').
349: '<form action="'.$r->uri.'" name="sheet" method="post">');
350: $r->print(&hiddenfield('sname' ,$ENV{'form.sname'}).
351: &hiddenfield('sdomain',$ENV{'form.sdomain'}).
1.6 matthew 352: &hiddenfield('usymb' ,$ENV{'form.usymb'}));
1.1 matthew 353: $r->rflush();
354: ##
355: ## Determine the filename to use
356: my $filename = undef;
1.3 matthew 357: if ($allowed_to_edit) {
1.1 matthew 358: $filename = $ENV{'form.filename'} if (exists($ENV{'form.filename'}));
359: #
360: if (exists($ENV{'form.load'}) && exists($ENV{'form.loadfilename'})) {
361: $filename = $ENV{'form.loadfilename'};
1.7 matthew 362: $ENV{'form.workcopy'} = 'no';
1.1 matthew 363: }
364: }
365: ##
366: ## Make the spreadsheet
367: &Apache::Spreadsheet::initialize_spreadsheet_package();
368: my $spreadsheet = undef;
369: if ($sheettype eq 'classcalc') {
370: $spreadsheet = Apache::classcalc->new($name,$domain,$filename,undef);
371: } elsif ($sheettype eq 'studentcalc') {
372: $spreadsheet = Apache::studentcalc->new($name,$domain,$filename,undef);
1.2 matthew 373: } elsif ($sheettype eq 'assesscalc' &&
374: defined($symb) &&
1.3 matthew 375: $allowed_to_edit) {
1.1 matthew 376: $spreadsheet = Apache::assesscalc->new($name,$domain,$filename,$symb);
377: } else {
1.2 matthew 378: return HTTP_NOT_ACCEPTABLE;
379: }
380: if (! defined($spreadsheet)) {
381: # error error - run in circles, scream and shout
1.1 matthew 382: return;
383: }
1.8 matthew 384: $spreadsheet->initialize();
1.5 matthew 385: #
386: # Output selector
1.1 matthew 387: ##
388: ## Editing/loading/saving
1.3 matthew 389: if ($allowed_to_edit) {
1.11 matthew 390: my ($html,$action_message) = &file_dialogs($spreadsheet);
1.10 matthew 391: if ($ENV{'form.makedefault'}) {
392: $spreadsheet->make_default();
1.11 matthew 393: if ($action_message) {
394: $action_message .= '<br />';
395: }
396: $action_message .= 'Made this spreadsheet the default';
397: if ($sheettype eq 'classcalc') {
398: $action_message .= ' for the course';
399: } elsif ($sheettype eq 'studentcalc') {
400: $action_message .= ' for all students';
401: } elsif ($sheettype eq 'assesscalc') {
402: $action_message .= ' for all assessments';
403: }
404: $action_message .= '.';
1.10 matthew 405: }
1.5 matthew 406: $r->print('<table><tr><td>'.$spreadsheet->html_header().'</td>'.
1.11 matthew 407: '<td valign="bottom">'.$html."</td></tr></table>\n");
1.12 matthew 408: if ($action_message ne '') {
409: $r->print(<<END);
1.11 matthew 410: <table>
411: <tr><td valign="top"><b>Last Action:</b></td>
412: <td> </td>
413: <td>$action_message</td>
414: </tr>
415: </table>
416: END
1.12 matthew 417: }
1.1 matthew 418: $r->rflush();
1.5 matthew 419: } else {
420: $r->print('<table><tr><td>'.$spreadsheet->html_header().
421: "</td></tr></table>\n");
1.1 matthew 422: }
1.11 matthew 423: $r->rflush();
1.1 matthew 424: #
1.13 matthew 425: if ($sheettype eq 'classcalc') {
1.10 matthew 426: $r->print('<input type="submit" value="Generate Spreadsheet" /><br />');
427: }
428: #
1.1 matthew 429: # Keep track of the filename
430: $r->print(&hiddenfield('filename',$filename));
431: #
1.5 matthew 432: # Keep track of the number of times we have been called, sort of.
433: $r->print(&hiddenfield('not_first_run','whatever'));
434: #
435: if (exists($ENV{'form.not_first_run'}) || $sheettype ne 'classcalc') {
436: $r->print($spreadsheet->get_html_title());
437: if ($allowed_to_view || $allowed_to_edit) {
438: $r->print($spreadsheet->parent_link());
439: }
1.16 matthew 440: $r->rflush();
1.5 matthew 441: $spreadsheet->display($r);
1.1 matthew 442: }
443: $r->print('</form></body></html>');
444: return OK;
445: }
446:
447: 1;
448:
449: __END__
450:
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