2 // This file is part of Moodle - http://moodle.org/
4 // Moodle is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // Moodle is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
18 * A Handler to process replies to forum posts.
21 * @subpackage core_message
22 * @copyright 2014 Andrew Nicols
23 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
26 namespace mod_forum\message\inbound;
28 defined('MOODLE_INTERNAL') || die();
30 require_once($CFG->dirroot . '/mod/forum/lib.php');
31 require_once($CFG->dirroot . '/repository/lib.php');
34 * A Handler to process replies to forum posts.
36 * @copyright 2014 Andrew Nicols
37 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
39 class reply_handler extends \core\message\inbound\handler {
42 * Return a description for the current handler.
46 public function get_description() {
47 return get_string('reply_handler', 'mod_forum');
51 * Return a short name for the current handler.
52 * This appears in the admin pages as a human-readable name.
56 public function get_name() {
57 return get_string('reply_handler_name', 'mod_forum');
61 * Process a message received and validated by the Inbound Message processor.
63 * @throws \core\message\inbound\processing_failed_exception
64 * @param \stdClass $messagedata The Inbound Message record
65 * @param \stdClass $messagedata The message data packet
66 * @return bool Whether the message was successfully processed.
68 public function process_message(\stdClass $record, \stdClass $messagedata) {
71 // Load the post being replied to.
72 $post = $DB->get_record('forum_posts', array('id' => $record->datavalue));
74 mtrace("--> Unable to find a post matching with id {$record->datavalue}");
78 // Load the discussion that this post is in.
79 $discussion = $DB->get_record('forum_discussions', array('id' => $post->discussion));
81 mtrace("--> Unable to find the discussion for post {$record->datavalue}");
85 // Load the other required data.
86 $forum = $DB->get_record('forum', array('id' => $discussion->forum));
87 $course = $DB->get_record('course', array('id' => $forum->course));
88 $cm = get_fast_modinfo($course->id)->instances['forum'][$forum->id];
89 $modcontext = \context_module::instance($cm->id);
90 $usercontext = \context_user::instance($USER->id);
92 // Make sure user can post in this discussion.
94 if (!forum_user_can_post($forum, $discussion, $USER, $cm, $course, $modcontext)) {
98 if (isset($cm->groupmode) && empty($course->groupmodeforce)) {
99 $groupmode = $cm->groupmode;
101 $groupmode = $course->groupmode;
103 if ($groupmode == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $modcontext)) {
104 if ($discussion->groupid == -1) {
107 if (!groups_is_member($discussion->groupid)) {
114 $data = new \stdClass();
115 $data->forum = $forum;
116 throw new \core\message\inbound\processing_failed_exception('messageinboundnopostforum', 'mod_forum', $data);
119 // And check the availability.
120 if (!\core_availability\info_module::is_user_visible($cm, $USER, true)) {
121 $data = new \stdClass();
122 $data->forum = $forum;
123 throw new \core\message\inbound\processing_failed_exception('messageinboundforumhidden', 'mod_forum', $data);
126 // Before we add this we must check that the user will not exceed the blocking threshold.
127 // This should result in an appropriate reply.
128 $thresholdwarning = forum_check_throttling($forum, $cm);
129 if (!empty($thresholdwarning) && !$thresholdwarning->canpost) {
130 $data = new \stdClass();
131 $data->forum = $forum;
132 $data->message = get_string($thresholdwarning->errorcode, $thresholdwarning->module, $thresholdwarning->additional);
133 throw new \core\message\inbound\processing_failed_exception('messageinboundthresholdhit', 'mod_forum', $data);
136 $subject = clean_param($messagedata->envelope->subject, PARAM_TEXT);
137 $restring = get_string('re', 'forum');
138 if (strpos($subject, $discussion->name)) {
139 // The discussion name is mentioned in the e-mail subject. This is probably just the standard reply. Use the
140 // standard reply subject instead.
141 $newsubject = $restring . ' ' . $discussion->name;
142 mtrace("--> Note: Post subject matched discussion name. Optimising from {$subject} to {$newsubject}");
143 $subject = $newsubject;
144 } else if (strpos($subject, $post->subject)) {
145 // The replied-to post's subject is mentioned in the e-mail subject.
146 // Use the previous post's subject instead of the e-mail subject.
147 $newsubject = $post->subject;
148 if (!strpos($restring, $post->subject)) {
149 // The previous post did not contain a re string, add it.
150 $newsubject = $restring . ' ' . $newsubject;
152 mtrace("--> Note: Post subject matched original post subject. Optimising from {$subject} to {$newsubject}");
153 $subject = $newsubject;
156 $addpost = new \stdClass();
157 $addpost->course = $course->id;
158 $addpost->forum = $forum->id;
159 $addpost->discussion = $discussion->id;
160 $addpost->modified = $messagedata->timestamp;
161 $addpost->subject = $subject;
162 $addpost->parent = $post->id;
163 $addpost->itemid = file_get_unused_draft_itemid();
165 if (!empty($messagedata->html)) {
166 $addpost->message = $messagedata->html;
167 $addpost->messageformat = FORMAT_HTML;
169 $addpost->message = $messagedata->plain;
170 $addpost->messageformat = FORMAT_PLAIN;
173 // We don't trust text coming from e-mail.
174 $addpost->messagetrust = false;
176 // Add attachments to the post.
177 if (!empty($messagedata->attachments['attachment']) && count($messagedata->attachments['attachment'])) {
178 $attachmentcount = count($messagedata->attachments['attachment']);
179 if (empty($forum->maxattachments) || $forum->maxbytes == 1 ||
180 !has_capability('mod/forum:createattachment', $modcontext)) {
181 // Attachments are not allowed.
182 mtrace("--> User does not have permission to attach files in this forum. Rejecting e-mail.");
184 $data = new \stdClass();
185 $data->forum = $forum;
186 $data->attachmentcount = $attachmentcount;
187 throw new \core\message\inbound\processing_failed_exception('messageinboundattachmentdisallowed', 'mod_forum', $data);
190 if ($forum->maxattachments < $attachmentcount) {
191 // Too many attachments.
192 mtrace("--> User attached {$attachmentcount} files when only {$forum->maxattachments} where allowed. "
193 . " Rejecting e-mail.");
195 $data = new \stdClass();
196 $data->forum = $forum;
197 $data->attachmentcount = $attachmentcount;
198 throw new \core\message\inbound\processing_failed_exception('messageinboundfilecountexceeded', 'mod_forum', $data);
202 $addpost->attachments = file_get_unused_draft_itemid();
203 foreach ($messagedata->attachments['attachment'] as $attachment) {
204 mtrace("--> Processing {$attachment->filename} as an attachment.");
205 $this->process_attachment('*', $usercontext, $addpost->attachments, $attachment);
206 $filesize += $attachment->filesize;
209 if ($forum->maxbytes < $filesize) {
210 // Too many attachments.
211 mtrace("--> User attached {$filesize} bytes of files when only {$forum->maxbytes} where allowed. "
212 . "Rejecting e-mail.");
213 $data = new \stdClass();
214 $data->forum = $forum;
215 $data->maxbytes = display_size($forum->maxbytes);
216 $data->filesize = display_size($filesize);
217 throw new \core\message\inbound\processing_failed_exception('messageinboundfilesizeexceeded', 'mod_forum', $data);
221 // Process any files in the message itself.
222 if (!empty($messagedata->attachments['inline'])) {
223 foreach ($messagedata->attachments['inline'] as $attachment) {
224 mtrace("--> Processing {$attachment->filename} as an inline attachment.");
225 $this->process_attachment('*', $usercontext, $addpost->itemid, $attachment);
227 // Convert the contentid link in the message.
228 $draftfile = \moodle_url::make_draftfile_url($addpost->itemid, '/', $attachment->filename);
229 $addpost->message = preg_replace('/cid:' . $attachment->contentid . '/', $draftfile, $addpost->message);
233 // Insert the message content now.
234 $addpost->id = forum_add_new_post($addpost, true);
236 // Log the new post creation.
238 'context' => $modcontext,
239 'objectid' => $addpost->id,
241 'discussionid' => $discussion->id,
242 'forumid' => $forum->id,
243 'forumtype' => $forum->type,
246 $event = \mod_forum\event\post_created::create($params);
247 $event->add_record_snapshot('forum_posts', $addpost);
248 $event->add_record_snapshot('forum_discussions', $discussion);
251 mtrace("--> Created a post {$addpost->id} in {$discussion->id}.");
256 * Process attachments included in a message.
258 * @param string[] $acceptedtypes String The mimetypes of the acceptable attachment types.
259 * @param \context_user $context context_user The context of the user creating this attachment.
260 * @param int $itemid int The itemid to store this attachment under.
261 * @param \stdClass $attachment stdClass The Attachment data to store.
262 * @return \stored_file
264 protected function process_attachment($acceptedtypes, \context_user $context, $itemid, \stdClass $attachment) {
267 // Create the file record.
268 $record = new \stdClass();
269 $record->filearea = 'draft';
270 $record->component = 'user';
272 $record->itemid = $itemid;
273 $record->license = $CFG->sitedefaultlicense;
274 $record->author = fullname($USER);
275 $record->contextid = $context->id;
276 $record->userid = $USER->id;
278 // All files sent by e-mail should have a flat structure.
279 $record->filepath = '/';
281 $record->filename = $attachment->filename;
283 mtrace("--> Attaching {$record->filename} to " .
284 "/{$record->contextid}/{$record->component}/{$record->filearea}/" .
285 "{$record->itemid}{$record->filepath}{$record->filename}");
287 $fs = get_file_storage();
288 return $fs->create_file_from_string($record, $attachment->content);
293 * Return the content of any success notification to be sent.
294 * Both an HTML and Plain Text variant must be provided.
296 * @param \stdClass $messagedata The message data.
297 * @param \stdClass $handlerresult The record for the newly created post.
298 * @return \stdClass with keys `html` and `plain`.
300 public function get_success_message(\stdClass $messagedata, $handlerresult) {
301 $a = new \stdClass();
302 $a->subject = $handlerresult->subject;
303 $discussionurl = new \moodle_url('/mod/forum/discuss.php', array('d' => $handlerresult->discussion));
304 $a->discussionurl = $discussionurl->out();
306 $message = new \stdClass();
307 $message->plain = get_string('postbymailsuccess', 'mod_forum', $a);
308 $message->html = get_string('postbymailsuccess_html', 'mod_forum', $a);