MDL-30377 forum: do not allow users to view not yet started or expired discussions
[moodle.git] / mod / forum / discuss.php
CommitLineData
1adbd2c3 1<?php
501cdbd8 2
8f685009
SH
3// This file is part of Moodle - http://moodle.org/
4//
5// Moodle is free software: you can redistribute it and/or modify
6// it under the terms of the GNU General Public License as published by
7// the Free Software Foundation, either version 3 of the License, or
8// (at your option) any later version.
9//
10// Moodle is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
17
18/**
19 * Displays a post, and all the posts below it.
20 * If no post is given, displays all posts in a discussion
21 *
22 * @package mod-forum
23 * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
24 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 */
501cdbd8 26
65bcf17b 27 require_once('../../config.php');
65bcf17b 28
83da3d28 29 $d = required_param('d', PARAM_INT); // Discussion ID
30 $parent = optional_param('parent', 0, PARAM_INT); // If set, then display this post and all children.
31 $mode = optional_param('mode', 0, PARAM_INT); // If set, changes the layout of the thread
32 $move = optional_param('move', 0, PARAM_INT); // If set, moves this discussion to another forum
87b0b499 33 $mark = optional_param('mark', '', PARAM_ALPHA); // Used for tracking read posts if user initiated.
83da3d28 34 $postid = optional_param('postid', 0, PARAM_INT); // Used for tracking read posts if user initiated.
501cdbd8 35
a6855934 36 $url = new moodle_url('/mod/forum/discuss.php', array('d'=>$d));
8a876913
SH
37 if ($parent !== 0) {
38 $url->param('parent', $parent);
39 }
8a876913 40 $PAGE->set_url($url);
d3558659 41
01d0aceb
SH
42 $discussion = $DB->get_record('forum_discussions', array('id' => $d), '*', MUST_EXIST);
43 $course = $DB->get_record('course', array('id' => $discussion->course), '*', MUST_EXIST);
44 $forum = $DB->get_record('forum', array('id' => $discussion->forum), '*', MUST_EXIST);
45 $cm = get_coursemodule_from_instance('forum', $forum->id, $course->id, false, MUST_EXIST);
68258534 46
bf553d9e 47 require_course_login($course, true, $cm);
50e07a49 48
12f6d016 49/// Add ajax-related libs
f44b10ed
PS
50 $PAGE->requires->yui2_lib('event');
51 $PAGE->requires->yui2_lib('connection');
52 $PAGE->requires->yui2_lib('json');
12f6d016 53
4cabf99f 54 // move this down fix for MDL-6926
01d0aceb 55 require_once($CFG->dirroot.'/mod/forum/lib.php');
4cabf99f 56
9af1611a 57 $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
65bcf17b 58 require_capability('mod/forum:viewdiscussion', $modcontext, NULL, true, 'noviewdiscussionspermission', 'forum');
59
9e86f2e7
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60 if (!empty($CFG->enablerssfeeds) && !empty($CFG->forum_enablerssfeeds) && $forum->rsstype && $forum->rssarticles) {
61 require_once("$CFG->libdir/rsslib.php");
62
8ebbb06a 63 $rsstitle = format_string($course->shortname, true, array('context' => get_context_instance(CONTEXT_COURSE, $course->id))) . ': %fullname%';
43b92251 64 rss_add_http_header($modcontext, 'mod_forum', $forum, $rsstitle);
9e86f2e7
AD
65 }
66
65bcf17b 67/// move discussion if requested
68 if ($move > 0 and confirm_sesskey()) {
a5f77de6 69 $return = $CFG->wwwroot.'/mod/forum/discuss.php?d='.$discussion->id;
65bcf17b 70
71 require_capability('mod/forum:movediscussions', $modcontext);
1fc49f00 72
65bcf17b 73 if ($forum->type == 'single') {
12e57b92 74 print_error('cannotmovefromsingleforum', 'forum', $return);
83da3d28 75 }
65bcf17b 76
4e445355 77 if (!$forumto = $DB->get_record('forum', array('id' => $move))) {
12e57b92 78 print_error('cannotmovetonotexist', 'forum', $return);
83da3d28 79 }
7c900d5d 80
5fad08b4
CF
81 if ($forumto->type == 'single') {
82 print_error('cannotmovetosingleforum', 'forum', $return);
83 }
84
65bcf17b 85 if (!$cmto = get_coursemodule_from_instance('forum', $forumto->id, $course->id)) {
12e57b92 86 print_error('cannotmovetonotfound', 'forum', $return);
65bcf17b 87 }
88
89 if (!coursemodule_visible_for_user($cmto)) {
12e57b92 90 print_error('cannotmovenotvisible', 'forum', $return);
1fc49f00 91 }
65bcf17b 92
01d0aceb 93 require_capability('mod/forum:startdiscussion', get_context_instance(CONTEXT_MODULE,$cmto->id));
ee8d825f 94
0faf6791 95 if (!forum_move_attachments($discussion, $forum->id, $forumto->id)) {
9146b979 96 echo $OUTPUT->notification("Errors occurred while moving attachment directories - check your file permissions");
65bcf17b 97 }
4e445355 98 $DB->set_field('forum_discussions', 'forum', $forumto->id, array('id' => $discussion->id));
99 $DB->set_field('forum_read', 'forumid', $forumto->id, array('discussionid' => $discussion->id));
65bcf17b 100 add_to_log($course->id, 'forum', 'move discussion', "discuss.php?d=$discussion->id", $discussion->id, $cmto->id);
101
102 require_once($CFG->libdir.'/rsslib.php');
01d0aceb 103 require_once($CFG->dirroot.'/mod/forum/rsslib.php');
65bcf17b 104
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105 // Delete the RSS files for the 2 forums to force regeneration of the feeds
106 forum_rss_delete_file($forum);
107 forum_rss_delete_file($forumto);
65bcf17b 108
e4c5abdc 109 redirect($return.'&moved=-1&sesskey='.sesskey());
1fc49f00 110 }
111
02c34fe1 112 add_to_log($course->id, 'forum', 'view discussion', "discuss.php?d=$discussion->id", $discussion->id, $cm->id);
501cdbd8 113
114 unset($SESSION->fromdiscussion);
115
279826e2 116 if ($mode) {
f2d042c4 117 set_user_preference('forum_displaymode', $mode);
279826e2 118 }
501cdbd8 119
acb50c1b 120 $displaymode = get_user_preferences('forum_displaymode', $CFG->forum_displaymode);
501cdbd8 121
e92ea3d8 122 if ($parent) {
65bcf17b 123 // If flat AND parent, then force nested display this time
124 if ($displaymode == FORUM_MODE_FLATOLDEST or $displaymode == FORUM_MODE_FLATNEWEST) {
125 $displaymode = FORUM_MODE_NESTED;
e92ea3d8 126 }
127 } else {
501cdbd8 128 $parent = $discussion->firstpost;
501cdbd8 129 }
130
11b0c469 131 if (! $post = forum_get_post_full($parent)) {
12e57b92 132 print_error("notexists", 'forum', "$CFG->wwwroot/mod/forum/view.php?f=$forum->id");
501cdbd8 133 }
134
73d13b1e
MN
135 if (!forum_user_can_see_post($forum, $discussion, $post, null, $cm)) {
136 print_error('noviewdiscussionspermission', 'forum', "$CFG->wwwroot/mod/forum/view.php?id=$forum->id");
f37da850 137 }
138
65bcf17b 139 if ($mark == 'read' or $mark == 'unread') {
90f4745c 140 if ($CFG->forum_usermarksread && forum_tp_can_track_forums($forum) && forum_tp_is_tracked($forum)) {
65bcf17b 141 if ($mark == 'read') {
90f4745c 142 forum_tp_add_read_record($USER->id, $postid);
65bcf17b 143 } else {
144 // unread
145 forum_tp_delete_read_records($USER->id, $postid);
146 }
147 }
148 }
cef1ce6a 149
6f1cc8d6 150 $searchform = forum_search_form($course);
39790bd8 151
01d0aceb
SH
152 $forumnode = $PAGE->navigation->find($cm->id, navigation_node::TYPE_ACTIVITY);
153 if (empty($forumnode)) {
154 $forumnode = $PAGE->navbar;
155 } else {
c89fa3fe 156 $forumnode->make_active();
87a462ea 157 }
01d0aceb 158 $node = $forumnode->add(format_string($discussion->name), new moodle_url('/mod/forum/discuss.php', array('d'=>$discussion->id)));
c89fa3fe 159 $node->display = false;
01d0aceb
SH
160 if ($node && $post->id != $discussion->firstpost) {
161 $node->add(format_string($post->subject), $PAGE->url);
162 }
163
15ca5e5e 164 $PAGE->set_title("$course->shortname: ".format_string($discussion->name));
165 $PAGE->set_heading($course->fullname);
166 $PAGE->set_button($searchform);
167 echo $OUTPUT->header();
c6d691dc 168
9197e147 169/// Check to see if groups are being used in this forum
170/// If so, make sure the current person is allowed to see this discussion
8b79a625 171/// Also, if we know they should be able to reply, then explicitly set $canreply for performance reasons
c6d691dc 172
8e18e1ec
PS
173 $canreply = forum_user_can_post($forum, $discussion, $USER, $cm, $course, $modcontext);
174 if (!$canreply and $forum->type !== 'news') {
175 if (isguestuser() or !isloggedin()) {
176 $canreply = true;
177 }
178 if (!is_enrolled($modcontext) and !is_viewing($modcontext)) {
179 // allow guests and not-logged-in to see the link - they are prompted to log in after clicking the link
180 // normal users with temporary guest access see this link too, they are asked to enrol instead
181 $canreply = enrol_selfenrol_available($course->id);
182 }
9197e147 183 }
184
c6d691dc 185/// Print the controls across the top
c00037cd 186 echo '<div class="discussioncontrols clearfix">';
c6d691dc 187
6708a1f5 188 if (!empty($CFG->enableportfolios) && has_capability('mod/forum:exportdiscussion', $modcontext)) {
24ba58ee 189 require_once($CFG->libdir.'/portfoliolib.php');
0d06b6fd 190 $button = new portfolio_add_button();
24ba58ee 191 $button->set_callback_options('forum_portfolio_caller', array('discussionid' => $discussion->id), '/mod/forum/locallib.php');
f3cc571a
DM
192 $button = $button->to_html(PORTFOLIO_ADD_FULL_FORM, get_string('exportdiscussion', 'mod_forum'));
193 $buttonextraclass = '';
194 if (empty($button)) {
195 // no portfolio plugin available.
196 $button = '&nbsp;';
197 $buttonextraclass = ' noavailable';
198 }
199 echo html_writer::tag('div', $button, array('class' => 'discussioncontrol exporttoportfolio'.$buttonextraclass));
f357d2f8
DM
200 } else {
201 echo html_writer::tag('div', '&nbsp;', array('class'=>'discussioncontrol nullcontrol'));
10ae55f9 202 }
203
f357d2f8
DM
204 // groups selector not needed here
205 echo '<div class="discussioncontrol displaymode">';
206 forum_print_mode_form($discussion->id, $displaymode);
207 echo "</div>";
208
cef1ce6a 209 if ($forum->type != 'single'
210 && has_capability('mod/forum:movediscussions', $modcontext)) {
65bcf17b 211
f357d2f8 212 echo '<div class="discussioncontrol movediscussion">';
cef1ce6a 213 // Popup menu to move discussions to other forums. The discussion in a
214 // single discussion forum can't be moved.
65bcf17b 215 $modinfo = get_fast_modinfo($course);
216 if (isset($modinfo->instances['forum'])) {
65bcf17b 217 $forummenu = array();
7487c856 218 $sections = get_all_sections($course->id);
5fad08b4
CF
219 // Check forum types and eliminate simple discussions.
220 $forumcheck = $DB->get_records('forum', array('course' => $course->id),'', 'id, type');
65bcf17b 221 foreach ($modinfo->instances['forum'] as $forumcm) {
ee8d825f 222 if (!$forumcm->uservisible || !has_capability('mod/forum:startdiscussion',
223 get_context_instance(CONTEXT_MODULE,$forumcm->id))) {
65bcf17b 224 continue;
fcc69042 225 }
65bcf17b 226 $section = $forumcm->sectionnum;
7487c856 227 $sectionname = get_section_name($course, $sections[$section]);
f1a3e072 228 if (empty($forummenu[$section])) {
7487c856 229 $forummenu[$section] = array($sectionname => array());
f1a3e072 230 }
5fad08b4
CF
231 $forumidcompare = $forumcm->instance != $forum->id;
232 $forumtypecheck = $forumcheck[$forumcm->instance]->type !== 'single';
233 if ($forumidcompare and $forumtypecheck) {
f1a3e072 234 $url = "/mod/forum/discuss.php?d=$discussion->id&move=$forumcm->instance&sesskey=".sesskey();
7487c856 235 $forummenu[$section][$sectionname][$url] = format_string($forumcm->name);
1fc49f00 236 }
237 }
238 if (!empty($forummenu)) {
12a24e00 239 echo '<div class="movediscussionoption">';
15e48a1a
SM
240 $select = new url_select($forummenu, '',
241 array(''=>get_string("movethisdiscussionto", "forum")),
242 'forummenu', get_string('move'));
f1a3e072 243 echo $OUTPUT->render($select);
1fc49f00 244 echo "</div>";
245 }
246 }
12a24e00 247 echo "</div>";
1fc49f00 248 }
12a24e00
RW
249 echo '<div class="clearfloat">&nbsp;</div>';
250 echo "</div>";
1fc49f00 251
a4f495bf 252 if (!empty($forum->blockafter) && !empty($forum->blockperiod)) {
39790bd8 253 $a = new stdClass();
65bcf17b 254 $a->blockafter = $forum->blockafter;
a4f495bf 255 $a->blockperiod = get_string('secondstotime'.$forum->blockperiod);
9146b979 256 echo $OUTPUT->notification(get_string('thisforumisthrottled','forum',$a));
a4f495bf 257 }
258
0468976c 259 if ($forum->type == 'qanda' && !has_capability('mod/forum:viewqandawithoutposting', $modcontext) &&
bbbf2d40 260 !forum_user_has_posted($forum->id,$discussion->id,$USER->id)) {
9146b979 261 echo $OUTPUT->notification(get_string('qandanotify','forum'));
098d27d4 262 }
263
65bcf17b 264 if ($move == -1 and confirm_sesskey()) {
9146b979 265 echo $OUTPUT->notification(get_string('discussionmoved', 'forum', format_string($forum->name,true)));
8de14dc7 266 }
267
65bcf17b 268 $canrate = has_capability('mod/forum:rate', $modcontext);
269 forum_print_discussion($course, $cm, $forum, $discussion, $post, $displaymode, $canreply, $canrate);
c6d691dc 270
396fb912 271 echo $OUTPUT->footer();
65bcf17b 272
501cdbd8 273
1adbd2c3 274