1: # The LearningOnline Network with CAPA
2: # Extract domain, courseID, and symb from a shortened URL,
3: # and switch role to a role in designated course.
4: #
5: # $Id: lontiny.pm,v 1.2 2018/04/14 02:29:44 raeburn Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29:
30: package Apache::lontiny;
31:
32: use strict;
33: use Apache::Constants qw(:common :http);
34: use Apache::lonnet;
35: use Apache::loncommon;
36: use Apache::lonhtmlcommon;
37: use Apache::lonroles;
38: use Apache::lonlocal;
39: use LONCAPA qw(:DEFAULT :match);
40:
41: sub handler {
42: my $r = shift;
43: my %user;
44: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
45: if ($handle ne '') {
46: if ($r->uri =~ m{^/tiny/($match_domain)/(\w+)$}) {
47: my ($cdom,$key) = ($1,$2);
48: if (&Apache::lonnet::domain($cdom) ne '') {
49: my $configuname = &Apache::lonnet::get_domainconfiguser($cdom);
50: my $tinyurl;
51: my ($result,$cached)=&Apache::lonnet::is_cached_new('tiny',$cdom."\0".$key);
52: if (defined($cached)) {
53: $tinyurl = $result;
54: } else {
55: my %currtiny = &Apache::lonnet::get('tiny',[$key],$cdom,$configuname);
56: if ($currtiny{$key} ne '') {
57: $tinyurl = $currtiny{$key};
58: &Apache::lonnet::do_cache_new('tiny',$cdom."\0".$key,$currtiny{$key},600);
59: }
60: }
61: if ($tinyurl) {
62: my ($cnum,$symb) = split(/\&/,$tinyurl);
63: if ($cnum =~ /^$match_courseid$/) {
64: my $chome = &Apache::lonnet::homeserver($cnum,$cdom);
65: if ($chome ne 'no_host') {
66: my %crsenv = &Apache::lonnet::coursedescription("$cdom/$cnum");
67: my @possroles = ('in','ta','ep','st','cr','ad');
68: if ($crsenv{'type'} eq 'Community') {
69: unshift(@possroles,'co');
70: } else {
71: unshift(@possroles,'cc');
72: }
73: my %roleshash = &Apache::lonnet::get_my_roles($env{'user.uname'},
74: $env{'user.domain'},
75: 'userroles',undef,
76: \@possroles,[$cdom],1);
77: my (%possroles,$hassection);
78: if (keys(%roleshash)) {
79: foreach my $entry (keys(%roleshash)) {
80: if ($entry =~ /^\Q$cnum:$cdom:\E([^:]+):([^:]*)$/) {
81: $possroles{$1} = $2;
82: if ($2 ne '') {
83: $hassection = 1;
84: }
85: }
86: }
87: }
88: my @allposs = keys(%possroles);
89: if (@allposs == 0) {
90: &show_roles($r,\%crsenv,\%possroles)
91: } elsif (@allposs == 1) {
92: my $newrole = "$allposs[0]./$cdom/$cnum";
93: $newrole = "$allposs[0]./$cdom/$cnum";
94: if ($possroles{$allposs[0]} ne '') {
95: $newrole .= "/$possroles{$allposs[0]}";
96: }
97: my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
98: '&destinationurl='.&HTML::Entities::encode($r->uri);
99: &do_redirect($r,$destination);
100: } elsif (keys(%possroles) > 1) {
101: if (grep(/^(cc|co)$/,@allposs)) {
102: my $newrole;
103: if (exists($possroles{'cc'})) {
104: $newrole = 'cc';
105: } else {
106: $newrole = 'co';
107: }
108: $newrole .= "./$cdom/$cnum";
109: my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
110: '&destinationurl='.&HTML::Entities::encode($r->uri);
111: &do_redirect($r,$destination);
112: } else {
113: my $hascustom;
114: if (grep(/^cr\//,@allposs)) {
115: $hascustom = 1;
116: }
117: &show_roles($r,\%crsenv,\%possroles,$hassection,$hascustom);
118: }
119: }
120: return OK;
121: }
122: }
123: }
124: }
125: }
126: &generic_error($r);
127: return OK;
128: } else {
129: return FORBIDDEN;
130: }
131: }
132:
133: sub do_redirect {
134: my ($r,$destination) = @_;
135: my $windowname = 'loncapaclient';
136: if ($env{'request.lti.login'}) {
137: $windowname .= 'lti';
138: }
139: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
140: my $args = {'bread_crumbs' => [{'href' => '','text' => 'Role initialization'},],};
141: &Apache::loncommon::content_type($r,'text/html');
142: $r->send_http_header;
143: $r->print(&Apache::loncommon::start_page('Valid link',$header,$args).
144: &Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";').
145: '<h1>'.&mt('Welcome').'</h1>'.
146: '<p>'.&mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>').'</p><p>'.
147: '<a href="'.$destination.'">'.&mt('Continue').'</a></p>'.
148: &Apache::loncommon::end_page());
149: return;
150: }
151:
152: sub show_roles {
153: my ($r,$crsenv,$possroles,$hassection,$hascustom) = @_;
154: &Apache::loncommon::content_type($r,'text/html');
155: $r->send_http_header;
156: my ($crsdesc,$crstype,$cdom,$cnum,$header,$title,$preamble,$datatable,$js,$args);
157: if (ref($crsenv) eq 'HASH') {
158: $crsdesc = $crsenv->{'description'};
159: $crstype = $crsenv->{'type'};
160: $cdom = $crsenv->{'domain'};
161: $cnum = $crsenv->{'num'};
162: }
163: if ($crstype eq '') {
164: $crstype = 'Course';
165: }
166: my $lc_crstype = lc($crstype);
167: if ($crsdesc ne '') {
168: $header = &mt("The page you requested belongs to the following $lc_crstype: [_1]",
169: '<i>'.$crsdesc.'</i>');
170: }
171: if (ref($possroles) eq 'HASH') {
172: if (keys(%{$possroles}) > 0) {
173: $args = {'bread_crumbs' => [{'href' => '','text' => "Choose role in $lc_crstype"},],};
174: $title = 'Choose a role'; #Do not localize.
175: if ($crstype eq 'Community') {
176: $preamble = &mt('You have the following active roles in this community:');
177: } else {
178: $preamble = &mt('You have the following active roles in this course:');
179: }
180: $datatable = '<form name="" action="/adm/roles">'.
181: '<input type="hidden" name="newrole" value="" />'.
182: '<input type="hidden" name="selectrole" value="1" />'.
183: '<input type="hidden" name="destinationurl" value="'.$r->uri.'" />'.
184: &Apache::loncommon::start_data_table().
185: &Apache::loncommon::start_data_table_header_row().
186: '<th></th><th>'.&mt('User role').'</th>';
187: if ($hassection) {
188: $datatable .= '<th>'.&mt('Section').'</th>';
189: }
190: if ($hascustom) {
191: $datatable .= '<th>'.&mt('Information').'</th>';
192: }
193: $datatable .= &Apache::loncommon::end_data_table_header_row();
194: my @available = sort(keys(%{$possroles}));
195: foreach my $role ('ad','in','ta','ep','st','cr') {
196: foreach my $key (@available) {
197: if ($key =~ m{^$role($|/)}) {
198: my $trolecode = "$key./$cdom/$cnum";
199: my $rolename = &Apache::lonnet::plaintext($key,$crstype,$cdom.'_'.$cnum);
200: my $sec = $possroles->{$key};
201: if ($sec ne '') {
202: $trolecode .= '/'.$sec;
203: }
204: my $buttonname=$trolecode;
205: $buttonname=~s/\W//g;
206: $datatable .= &Apache::loncommon::start_data_table_row().
207: '<td><input name="'.$buttonname.'" type="button" value="'.
208: &mt('Select').'" onclick="javascript:enterrole(this.form,'.
209: "'$trolecode','$buttonname'".');" /></td>';
210: if ($key =~ /^cr\//) {
211: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$key);
212: $datatable .= '<td><span class="LC_nobreak">'.$rolename.'</span></td>';
213: if ($hassection) {
214: $datatable .= '<td>'.$sec.'</td>';
215: }
216: $datatable.= '<td><span class="LC_fontsize_small LC_cusr_emph">'.
217: &mt('Custom role defined by [_1]',$rauthor.':'.$rdomain).
218: '</td>';
219: } else {
220: if ($hassection) {
221: $datatable .= '<td>'.$rolename.'</td>';
222: if ($hascustom) {
223: $datatable .= '<td colspan="2">'.$sec.'</td>';
224: } else {
225: $datatable .= '<td>'.$sec.'</td>';
226: }
227: } elsif ($hascustom) {
228: $datatable .= '<td colspan="2">'.$rolename.'</td>';
229: } else {
230: $datatable .= '<td>'.$rolename.'</td>';
231: }
232: }
233: $datatable .= &Apache::loncommon::end_data_table_row();
234: }
235: }
236: }
237: $datatable .= &Apache::loncommon::end_data_table().
238: '</form>';
239: my $standby = &mt('Role selected. Please stand by.');
240: $js = <<"ENDJS";
241: <script type="text/javascript">
242: // <![CDATA[
243:
244: active=true;
245:
246: function enterrole (thisform,rolecode,buttonname) {
247: if (active) {
248: active=false;
249: document.title='$standby';
250: window.status='$standby';
251: thisform.newrole.value=rolecode;
252: thisform.submit();
253: } else {
254: alert('$standby');
255: }
256: }
257:
258: // ]]>
259: </script>
260: ENDJS
261: } else {
262: $title = 'No active role';
263: $preamble = &mt("You have no active roles in this $lc_crstype so the page is currently unavailable to you.");
264: $args = {'bread_crumbs' => [{'href' => '','text' => 'Role status'},],};
265: }
266: }
267: &Apache::loncommon::content_type($r,'text/html');
268: $r->send_http_header;
269: $r->print(&Apache::loncommon::start_page($title,$js,$args).
270: '<h3>'.$header.'</h3>'.
271: '<div>'.$preamble.'</div>'.
272: $datatable.
273: &Apache::loncommon::end_page());
274: return;
275: }
276:
277: sub generic_error {
278: my ($r) = @_;
279: my $linktext;
280: if ($env{'user.adv'}) {
281: $linktext = &mt('Continue to your roles page');
282: } else {
283: $linktext = &mt('Continue to your courses page');
284: }
285: my $continuelink='<a href="/adm/roles">'.$linktext.'</a>';
286: my $msg = &mt('The page you requested does not exist.');
287: &Apache::loncommon::content_type($r,'text/html');
288: $r->send_http_header;
289: my $args = {'bread_crumbs' => [{'href' => '','text' => 'Link status'},],};
290: $r->print(&Apache::loncommon::start_page('Invalid URL',undef,$args).
291: '<div class="LC_error">'.$msg.'</div>'.
292: '<p>'.$continuelink.'</p>'.
293: &Apache::loncommon::end_page());
294: return;
295: }
296:
297: 1;
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