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 * Library functions for messaging
20 * @package core_message
21 * @copyright 2008 Luis Rodrigues
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 require_once($CFG->libdir.'/eventslib.php');
27 define ('MESSAGE_SHORTLENGTH', 300);
29 //$PAGE isnt set if we're being loaded by cron which doesnt display popups anyway
31 //TODO: this is a mega crazy hack - it is not acceptable to call anything when including lib!!! (skodak)
32 $PAGE->set_popup_notification_allowed(false); // We are in a message window (so don't pop up a new one)
35 define ('MESSAGE_DISCUSSION_WIDTH',600);
36 define ('MESSAGE_DISCUSSION_HEIGHT',500);
38 define ('MESSAGE_SHORTVIEW_LIMIT', 8);//the maximum number of messages to show on the short message history
40 define('MESSAGE_HISTORY_SHORT',0);
41 define('MESSAGE_HISTORY_ALL',1);
43 define('MESSAGE_VIEW_UNREAD_MESSAGES','unread');
44 define('MESSAGE_VIEW_RECENT_CONVERSATIONS','recentconversations');
45 define('MESSAGE_VIEW_RECENT_NOTIFICATIONS','recentnotifications');
46 define('MESSAGE_VIEW_CONTACTS','contacts');
47 define('MESSAGE_VIEW_BLOCKED','blockedusers');
48 define('MESSAGE_VIEW_COURSE','course_');
49 define('MESSAGE_VIEW_SEARCH','search');
51 define('MESSAGE_SEARCH_MAX_RESULTS', 200);
53 define('MESSAGE_CONTACTS_PER_PAGE',10);
54 define('MESSAGE_MAX_COURSE_NAME_LENGTH', 30);
57 * Define contants for messaging default settings population. For unambiguity of
58 * plugin developer intentions we use 4-bit value (LSB numbering):
59 * bit 0 - whether to send message when user is loggedin (MESSAGE_DEFAULT_LOGGEDIN)
60 * bit 1 - whether to send message when user is loggedoff (MESSAGE_DEFAULT_LOGGEDOFF)
61 * bit 2..3 - messaging permission (MESSAGE_DISALLOWED|MESSAGE_PERMITTED|MESSAGE_FORCED)
63 * MESSAGE_PERMITTED_MASK contains the mask we use to distinguish permission setting
66 define('MESSAGE_DEFAULT_LOGGEDIN', 0x01); // 0001
67 define('MESSAGE_DEFAULT_LOGGEDOFF', 0x02); // 0010
69 define('MESSAGE_DISALLOWED', 0x04); // 0100
70 define('MESSAGE_PERMITTED', 0x08); // 1000
71 define('MESSAGE_FORCED', 0x0c); // 1100
73 define('MESSAGE_PERMITTED_MASK', 0x0c); // 1100
76 * Set default value for default outputs permitted setting
78 define('MESSAGE_DEFAULT_PERMITTED', 'permitted');
80 //TODO: defaults must be initialised via settings - this is a bad hack! (skodak)
81 if (!isset($CFG->message_contacts_refresh)) { // Refresh the contacts list every 60 seconds
82 $CFG->message_contacts_refresh = 60;
84 if (!isset($CFG->message_chat_refresh)) { // Look for new comments every 5 seconds
85 $CFG->message_chat_refresh = 5;
87 if (!isset($CFG->message_offline_time)) {
88 $CFG->message_offline_time = 300;
92 * Print the selector that allows the user to view their contacts, course participants, their recent
95 * @param int $countunreadtotal how many unread messages does the user have?
96 * @param int $viewing What is the user viewing? ie MESSAGE_VIEW_UNREAD_MESSAGES, MESSAGE_VIEW_SEARCH etc
97 * @param object $user1 the user whose messages are being viewed
98 * @param object $user2 the user $user1 is talking to
99 * @param array $blockedusers an array of users blocked by $user1
100 * @param array $onlinecontacts an array of $user1's online contacts
101 * @param array $offlinecontacts an array of $user1's offline contacts
102 * @param array $strangers an array of users who have messaged $user1 who aren't contacts
103 * @param bool $showcontactactionlinks show action links (add/remove contact etc) next to the users in the contact selector
104 * @param int $page if there are so many users listed that they have to be split into pages what page are we viewing
107 function message_print_contact_selector($countunreadtotal, $viewing, $user1, $user2, $blockedusers, $onlinecontacts, $offlinecontacts, $strangers, $showcontactactionlinks, $page=0) {
110 echo html_writer::start_tag('div', array('class' => 'contactselector mdl-align'));
112 //if 0 unread messages and they've requested unread messages then show contacts
113 if ($countunreadtotal == 0 && $viewing == MESSAGE_VIEW_UNREAD_MESSAGES) {
114 $viewing = MESSAGE_VIEW_CONTACTS;
117 //if they have no blocked users and they've requested blocked users switch them over to contacts
118 if (count($blockedusers) == 0 && $viewing == MESSAGE_VIEW_BLOCKED) {
119 $viewing = MESSAGE_VIEW_CONTACTS;
122 $onlyactivecourses = true;
123 $courses = enrol_get_users_courses($user1->id, $onlyactivecourses);
124 $coursecontexts = message_get_course_contexts($courses);//we need one of these again so holding on to them
126 $strunreadmessages = null;
127 if ($countunreadtotal>0) { //if there are unread messages
128 $strunreadmessages = get_string('unreadmessages','message', $countunreadtotal);
131 message_print_usergroup_selector($viewing, $courses, $coursecontexts, $countunreadtotal, count($blockedusers), $strunreadmessages);
133 if ($viewing == MESSAGE_VIEW_UNREAD_MESSAGES) {
134 message_print_contacts($onlinecontacts, $offlinecontacts, $strangers, $PAGE->url, 1, $showcontactactionlinks,$strunreadmessages, $user2);
135 } else if ($viewing == MESSAGE_VIEW_CONTACTS || $viewing == MESSAGE_VIEW_SEARCH || $viewing == MESSAGE_VIEW_RECENT_CONVERSATIONS || $viewing == MESSAGE_VIEW_RECENT_NOTIFICATIONS) {
136 message_print_contacts($onlinecontacts, $offlinecontacts, $strangers, $PAGE->url, 0, $showcontactactionlinks, $strunreadmessages, $user2);
137 } else if ($viewing == MESSAGE_VIEW_BLOCKED) {
138 message_print_blocked_users($blockedusers, $PAGE->url, $showcontactactionlinks, null, $user2);
139 } else if (substr($viewing, 0, 7) == MESSAGE_VIEW_COURSE) {
140 $courseidtoshow = intval(substr($viewing, 7));
142 if (!empty($courseidtoshow)
143 && array_key_exists($courseidtoshow, $coursecontexts)
144 && has_capability('moodle/course:viewparticipants', $coursecontexts[$courseidtoshow])) {
146 message_print_participants($coursecontexts[$courseidtoshow], $courseidtoshow, $PAGE->url, $showcontactactionlinks, null, $page, $user2);
148 //shouldn't get here. User trying to access a course they're not in perhaps.
149 add_to_log(SITEID, 'message', 'view', 'index.php', $viewing);
153 echo html_writer::start_tag('form', array('action' => 'index.php','method' => 'GET'));
154 echo html_writer::start_tag('fieldset');
155 $managebuttonclass = 'visible';
156 if ($viewing == MESSAGE_VIEW_SEARCH) {
157 $managebuttonclass = 'hiddenelement';
159 $strmanagecontacts = get_string('search','message');
160 echo html_writer::empty_tag('input', array('type' => 'hidden','name' => 'viewing','value' => MESSAGE_VIEW_SEARCH));
161 echo html_writer::empty_tag('input', array('type' => 'submit','value' => $strmanagecontacts,'class' => $managebuttonclass));
162 echo html_writer::end_tag('fieldset');
163 echo html_writer::end_tag('form');
165 echo html_writer::end_tag('div');
169 * Print course participants. Called by message_print_contact_selector()
171 * @param object $context the course context
172 * @param int $courseid the course ID
173 * @param string $contactselecturl the url to send the user to when a contact's name is clicked
174 * @param bool $showactionlinks show action links (add/remove contact etc) next to the users
175 * @param string $titletodisplay Optionally specify a title to display above the participants
176 * @param int $page if there are so many users listed that they have to be split into pages what page are we viewing
177 * @param object $user2 the user $user1 is talking to. They will be highlighted if they appear in the list of participants
180 function message_print_participants($context, $courseid, $contactselecturl=null, $showactionlinks=true, $titletodisplay=null, $page=0, $user2=null) {
181 global $DB, $USER, $PAGE, $OUTPUT;
183 if (empty($titletodisplay)) {
184 $titletodisplay = get_string('participants');
187 $countparticipants = count_enrolled_users($context);
188 $participants = get_enrolled_users($context, '', 0, 'u.*', '', $page*MESSAGE_CONTACTS_PER_PAGE, MESSAGE_CONTACTS_PER_PAGE);
190 $pagingbar = new paging_bar($countparticipants, $page, MESSAGE_CONTACTS_PER_PAGE, $PAGE->url, 'page');
191 echo $OUTPUT->render($pagingbar);
193 echo html_writer::start_tag('table', array('id' => 'message_participants', 'class' => 'boxaligncenter', 'cellspacing' => '2', 'cellpadding' => '0', 'border' => '0'));
195 echo html_writer::start_tag('tr');
196 echo html_writer::tag('td', $titletodisplay, array('colspan' => 3, 'class' => 'heading'));
197 echo html_writer::end_tag('tr');
199 //todo these need to come from somewhere if the course participants list is to show users with unread messages
202 foreach ($participants as $participant) {
203 if ($participant->id != $USER->id) {
204 $participant->messagecount = 0;//todo it would be nice if the course participant could report new messages
205 message_print_contactlist_user($participant, $iscontact, $isblocked, $contactselecturl, $showactionlinks, $user2);
209 echo html_writer::end_tag('table');
213 * Retrieve users blocked by $user1
215 * @param object $user1 the user whose messages are being viewed
216 * @param object $user2 the user $user1 is talking to. If they are being blocked
217 * they will have a variable called 'isblocked' added to their user object
218 * @return array the users blocked by $user1
220 function message_get_blocked_users($user1=null, $user2=null) {
227 if (!empty($user2)) {
228 $user2->isblocked = false;
231 $blockedusers = array();
233 $userfields = user_picture::fields('u', array('lastaccess'));
234 $blockeduserssql = "SELECT $userfields, COUNT(m.id) AS messagecount
235 FROM {message_contacts} mc
236 JOIN {user} u ON u.id = mc.contactid
237 LEFT OUTER JOIN {message} m ON m.useridfrom = mc.contactid AND m.useridto = :user1id1
238 WHERE mc.userid = :user1id2 AND mc.blocked = 1
240 ORDER BY u.firstname ASC";
241 $rs = $DB->get_recordset_sql($blockeduserssql, array('user1id1' => $user1->id, 'user1id2' => $user1->id));
243 foreach($rs as $rd) {
244 $blockedusers[] = $rd;
246 if (!empty($user2) && $user2->id == $rd->id) {
247 $user2->isblocked = true;
252 return $blockedusers;
256 * Print users blocked by $user1. Called by message_print_contact_selector()
258 * @param array $blockedusers the users blocked by $user1
259 * @param string $contactselecturl the url to send the user to when a contact's name is clicked
260 * @param bool $showactionlinks show action links (add/remove contact etc) next to the users
261 * @param string $titletodisplay Optionally specify a title to display above the participants
262 * @param object $user2 the user $user1 is talking to. They will be highlighted if they appear in the list of blocked users
265 function message_print_blocked_users($blockedusers, $contactselecturl=null, $showactionlinks=true, $titletodisplay=null, $user2=null) {
268 $countblocked = count($blockedusers);
270 echo html_writer::start_tag('table', array('id' => 'message_contacts', 'class' => 'boxaligncenter'));
272 if (!empty($titletodisplay)) {
273 echo html_writer::start_tag('tr');
274 echo html_writer::tag('td', $titletodisplay, array('colspan' => 3, 'class' => 'heading'));
275 echo html_writer::end_tag('tr');
279 echo html_writer::start_tag('tr');
280 echo html_writer::tag('td', get_string('blockedusers', 'message', $countblocked), array('colspan' => 3, 'class' => 'heading'));
281 echo html_writer::end_tag('tr');
283 $isuserblocked = true;
284 $isusercontact = false;
285 foreach ($blockedusers as $blockeduser) {
286 message_print_contactlist_user($blockeduser, $isusercontact, $isuserblocked, $contactselecturl, $showactionlinks, $user2);
290 echo html_writer::end_tag('table');
294 * Retrieve $user1's contacts (online, offline and strangers)
296 * @param object $user1 the user whose messages are being viewed
297 * @param object $user2 the user $user1 is talking to. If they are a contact
298 * they will have a variable called 'iscontact' added to their user object
299 * @return array containing 3 arrays. array($onlinecontacts, $offlinecontacts, $strangers)
301 function message_get_contacts($user1=null, $user2=null) {
302 global $DB, $CFG, $USER;
308 if (!empty($user2)) {
309 $user2->iscontact = false;
312 $timetoshowusers = 300; //Seconds default
313 if (isset($CFG->block_online_users_timetosee)) {
314 $timetoshowusers = $CFG->block_online_users_timetosee * 60;
317 // time which a user is counting as being active since
318 $timefrom = time()-$timetoshowusers;
320 // people in our contactlist who are online
321 $onlinecontacts = array();
322 // people in our contactlist who are offline
323 $offlinecontacts = array();
324 // people who are not in our contactlist but have sent us a message
325 $strangers = array();
327 $userfields = user_picture::fields('u', array('lastaccess'));
329 // get all in our contactlist who are not blocked in our contact list
330 // and count messages we have waiting from each of them
331 $contactsql = "SELECT $userfields, COUNT(m.id) AS messagecount
332 FROM {message_contacts} mc
333 JOIN {user} u ON u.id = mc.contactid
334 LEFT OUTER JOIN {message} m ON m.useridfrom = mc.contactid AND m.useridto = ?
335 WHERE mc.userid = ? AND mc.blocked = 0
337 ORDER BY u.firstname ASC";
339 $rs = $DB->get_recordset_sql($contactsql, array($user1->id, $user1->id));
340 foreach ($rs as $rd) {
341 if ($rd->lastaccess >= $timefrom) {
342 // they have been active recently, so are counted online
343 $onlinecontacts[] = $rd;
346 $offlinecontacts[] = $rd;
349 if (!empty($user2) && $user2->id == $rd->id) {
350 $user2->iscontact = true;
355 // get messages from anyone who isn't in our contact list and count the number
356 // of messages we have from each of them
357 $strangersql = "SELECT $userfields, count(m.id) as messagecount
359 JOIN {user} u ON u.id = m.useridfrom
360 LEFT OUTER JOIN {message_contacts} mc ON mc.contactid = m.useridfrom AND mc.userid = m.useridto
361 WHERE mc.id IS NULL AND m.useridto = ?
363 ORDER BY u.firstname ASC";
365 $rs = $DB->get_recordset_sql($strangersql, array($USER->id));
366 foreach ($rs as $rd) {
371 return array($onlinecontacts, $offlinecontacts, $strangers);
375 * Print $user1's contacts. Called by message_print_contact_selector()
377 * @param array $onlinecontacts $user1's contacts which are online
378 * @param array $offlinecontacts $user1's contacts which are offline
379 * @param array $strangers users which are not contacts but who have messaged $user1
380 * @param string $contactselecturl the url to send the user to when a contact's name is clicked
381 * @param int $minmessages The minimum number of unread messages required from a user for them to be displayed
382 * Typically 0 (show all contacts) or 1 (only show contacts from whom we have a new message)
383 * @param bool $showactionlinks show action links (add/remove contact etc) next to the users
384 * @param string $titletodisplay Optionally specify a title to display above the participants
385 * @param object $user2 the user $user1 is talking to. They will be highlighted if they appear in the list of contacts
388 function message_print_contacts($onlinecontacts, $offlinecontacts, $strangers, $contactselecturl=null, $minmessages=0, $showactionlinks=true, $titletodisplay=null, $user2=null) {
389 global $CFG, $PAGE, $OUTPUT;
391 $countonlinecontacts = count($onlinecontacts);
392 $countofflinecontacts = count($offlinecontacts);
393 $countstrangers = count($strangers);
394 $isuserblocked = null;
396 if ($countonlinecontacts + $countofflinecontacts == 0) {
397 echo html_writer::tag('div', get_string('contactlistempty', 'message'), array('class' => 'heading'));
400 echo html_writer::start_tag('table', array('id' => 'message_contacts', 'class' => 'boxaligncenter'));
402 if (!empty($titletodisplay)) {
403 message_print_heading($titletodisplay);
406 if($countonlinecontacts) {
407 /// print out list of online contacts
409 if (empty($titletodisplay)) {
410 message_print_heading(get_string('onlinecontacts', 'message', $countonlinecontacts));
413 $isuserblocked = false;
414 $isusercontact = true;
415 foreach ($onlinecontacts as $contact) {
416 if ($minmessages == 0 || $contact->messagecount >= $minmessages) {
417 message_print_contactlist_user($contact, $isusercontact, $isuserblocked, $contactselecturl, $showactionlinks, $user2);
422 if ($countofflinecontacts) {
423 /// print out list of offline contacts
425 if (empty($titletodisplay)) {
426 message_print_heading(get_string('offlinecontacts', 'message', $countofflinecontacts));
429 $isuserblocked = false;
430 $isusercontact = true;
431 foreach ($offlinecontacts as $contact) {
432 if ($minmessages == 0 || $contact->messagecount >= $minmessages) {
433 message_print_contactlist_user($contact, $isusercontact, $isuserblocked, $contactselecturl, $showactionlinks, $user2);
439 /// print out list of incoming contacts
440 if ($countstrangers) {
441 message_print_heading(get_string('incomingcontacts', 'message', $countstrangers));
443 $isuserblocked = false;
444 $isusercontact = false;
445 foreach ($strangers as $stranger) {
446 if ($minmessages == 0 || $stranger->messagecount >= $minmessages) {
447 message_print_contactlist_user($stranger, $isusercontact, $isuserblocked, $contactselecturl, $showactionlinks, $user2);
452 echo html_writer::end_tag('table');
454 if ($countstrangers && ($countonlinecontacts + $countofflinecontacts == 0)) { // Extra help
455 echo html_writer::tag('div','('.get_string('addsomecontactsincoming', 'message').')',array('class' => 'note'));
460 * Print a select box allowing the user to choose to view new messages, course participants etc.
462 * Called by message_print_contact_selector()
463 * @param int $viewing What page is the user viewing ie MESSAGE_VIEW_UNREAD_MESSAGES, MESSAGE_VIEW_RECENT_CONVERSATIONS etc
464 * @param array $courses array of course objects. The courses the user is enrolled in.
465 * @param array $coursecontexts array of course contexts. Keyed on course id.
466 * @param int $countunreadtotal how many unread messages does the user have?
467 * @param int $countblocked how many users has the current user blocked?
468 * @param string $strunreadmessages a preconstructed message about the number of unread messages the user has
471 function message_print_usergroup_selector($viewing, $courses, $coursecontexts, $countunreadtotal, $countblocked, $strunreadmessages) {
474 if ($countunreadtotal>0) { //if there are unread messages
475 $options[MESSAGE_VIEW_UNREAD_MESSAGES] = $strunreadmessages;
478 $str = get_string('mycontacts', 'message');
479 $options[MESSAGE_VIEW_CONTACTS] = $str;
481 $options[MESSAGE_VIEW_RECENT_CONVERSATIONS] = get_string('mostrecentconversations', 'message');
482 $options[MESSAGE_VIEW_RECENT_NOTIFICATIONS] = get_string('mostrecentnotifications', 'message');
484 if (!empty($courses)) {
485 $courses_options = array();
487 foreach($courses as $course) {
488 if (has_capability('moodle/course:viewparticipants', $coursecontexts[$course->id])) {
489 //Not using short_text() as we want the end of the course name. Not the beginning.
490 $shortname = format_string($course->shortname, true, array('context' => $coursecontexts[$course->id]));
491 if (textlib::strlen($shortname) > MESSAGE_MAX_COURSE_NAME_LENGTH) {
492 $courses_options[MESSAGE_VIEW_COURSE.$course->id] = '...'.textlib::substr($shortname, -MESSAGE_MAX_COURSE_NAME_LENGTH);
494 $courses_options[MESSAGE_VIEW_COURSE.$course->id] = $shortname;
499 if (!empty($courses_options)) {
500 $options[] = array(get_string('courses') => $courses_options);
504 if ($countblocked>0) {
505 $str = get_string('blockedusers','message', $countblocked);
506 $options[MESSAGE_VIEW_BLOCKED] = $str;
509 echo html_writer::start_tag('form', array('id' => 'usergroupform','method' => 'get','action' => ''));
510 echo html_writer::start_tag('fieldset');
511 echo html_writer::label(get_string('messagenavigation', 'message'), 'viewing');
512 echo html_writer::select($options, 'viewing', $viewing, false, array('id' => 'viewing','onchange' => 'this.form.submit()'));
513 echo html_writer::end_tag('fieldset');
514 echo html_writer::end_tag('form');
518 * Load the course contexts for all of the users courses
520 * @param array $courses array of course objects. The courses the user is enrolled in.
521 * @return array of course contexts
523 function message_get_course_contexts($courses) {
524 $coursecontexts = array();
526 foreach($courses as $course) {
527 $coursecontexts[$course->id] = context_course::instance($course->id);
530 return $coursecontexts;
534 * strip off action parameters like 'removecontact'
536 * @param moodle_url/string $moodleurl a URL. Typically the current page URL.
537 * @return string the URL minus parameters that perform actions (like adding/removing/blocking a contact).
539 function message_remove_url_params($moodleurl) {
540 $newurl = new moodle_url($moodleurl);
541 $newurl->remove_params('addcontact','removecontact','blockcontact','unblockcontact');
542 return $newurl->out();
546 * Count the number of messages with a field having a specified value.
547 * if $field is empty then return count of the whole array
548 * if $field is non-existent then return 0
550 * @param array $messagearray array of message objects
551 * @param string $field the field to inspect on the message objects
552 * @param string $value the value to test the field against
554 function message_count_messages($messagearray, $field='', $value='') {
555 if (!is_array($messagearray)) return 0;
556 if ($field == '' or empty($messagearray)) return count($messagearray);
559 foreach ($messagearray as $message) {
560 $count += ($message->$field == $value) ? 1 : 0;
566 * Returns the count of unread messages for user. Either from a specific user or from all users.
568 * @param object $user1 the first user. Defaults to $USER
569 * @param object $user2 the second user. If null this function will count all of user 1's unread messages.
570 * @return int the count of $user1's unread messages
572 function message_count_unread_messages($user1=null, $user2=null) {
579 if (!empty($user2)) {
580 return $DB->count_records_select('message', "useridto = ? AND useridfrom = ?",
581 array($user1->id, $user2->id), "COUNT('id')");
583 return $DB->count_records_select('message', "useridto = ?",
584 array($user1->id), "COUNT('id')");
589 * Count the number of users blocked by $user1
591 * @param object $user1 user object
592 * @return int the number of blocked users
594 function message_count_blocked_users($user1=null) {
601 $sql = "SELECT count(mc.id)
602 FROM {message_contacts} mc
603 WHERE mc.userid = :userid AND mc.blocked = 1";
604 $params = array('userid' => $user1->id);
606 return $DB->count_records_sql($sql, $params);
610 * Print the search form and search results if a search has been performed
612 * @param boolean $advancedsearch show basic or advanced search form
613 * @param object $user1 the current user
614 * @return boolean true if a search was performed
616 function message_print_search($advancedsearch = false, $user1=null) {
617 $frm = data_submitted();
619 $doingsearch = false;
621 if (confirm_sesskey()) {
622 $doingsearch = !empty($frm->combinedsubmit) || !empty($frm->keywords) || (!empty($frm->personsubmit) and !empty($frm->name));
628 if (!empty($frm->combinedsearch)) {
629 $combinedsearchstring = $frm->combinedsearch;
631 //$combinedsearchstring = get_string('searchcombined','message').'...';
632 $combinedsearchstring = '';
636 if ($advancedsearch) {
639 if (!empty($frm->keywords)) {
640 $messagesearch = $frm->keywords;
643 if (!empty($frm->name)) {
644 $personsearch = $frm->name;
646 include('search_advanced.html');
648 include('search.html');
651 $showicontext = false;
652 message_print_search_results($frm, $showicontext, $user1);
657 if ($advancedsearch) {
658 $personsearch = $messagesearch = '';
659 include('search_advanced.html');
661 include('search.html');
668 * Get the users recent conversations meaning all the people they've recently
669 * sent or received a message from plus the most recent message sent to or received from each other user
671 * @param object $user the current user
672 * @param int $limitfrom can be used for paging
673 * @param int $limitto can be used for paging
676 function message_get_recent_conversations($user, $limitfrom=0, $limitto=100) {
679 $userfields = user_picture::fields('u', array('lastaccess'));
680 //This query retrieves the last message received from and sent to each user
681 //It unions that data then, within that set, it finds the most recent message you've exchanged with each user over all
682 //It then joins with some other tables to get some additional data we need
684 //message ID is used instead of timecreated as it should sort the same and will be much faster
686 //There is a separate query for read and unread queries as they are stored in different tables
687 //They were originally retrieved in one query but it was so large that it was difficult to be confident in its correctness
688 $sql = "SELECT $userfields, mr.id as mid, mr.smallmessage, mr.fullmessage, mr.timecreated, mc.id as contactlistid, mc.blocked
689 FROM {message_read} mr
691 SELECT messages.userid AS userid, MAX(messages.mid) AS mid
693 SELECT mr1.useridto AS userid, MAX(mr1.id) AS mid
694 FROM {message_read} mr1
695 WHERE mr1.useridfrom = :userid1
696 AND mr1.notification = 0
697 GROUP BY mr1.useridto
699 SELECT mr2.useridfrom AS userid, MAX(mr2.id) AS mid
700 FROM {message_read} mr2
701 WHERE mr2.useridto = :userid2
702 AND mr2.notification = 0
703 GROUP BY mr2.useridfrom
705 GROUP BY messages.userid
706 ) messages2 ON mr.id = messages2.mid AND (mr.useridto = messages2.userid OR mr.useridfrom = messages2.userid)
707 JOIN {user} u ON u.id = messages2.userid
708 LEFT JOIN {message_contacts} mc ON mc.userid = :userid3 AND mc.contactid = u.id
709 WHERE u.deleted = '0'
710 ORDER BY mr.id DESC";
711 $params = array('userid1' => $user->id, 'userid2' => $user->id, 'userid3' => $user->id);
712 $read = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
714 $sql = "SELECT $userfields, m.id as mid, m.smallmessage, m.fullmessage, m.timecreated, mc.id as contactlistid, mc.blocked
717 SELECT messages.userid AS userid, MAX(messages.mid) AS mid
719 SELECT m1.useridto AS userid, MAX(m1.id) AS mid
721 WHERE m1.useridfrom = :userid1
722 AND m1.notification = 0
725 SELECT m2.useridfrom AS userid, MAX(m2.id) AS mid
727 WHERE m2.useridto = :userid2
728 AND m2.notification = 0
729 GROUP BY m2.useridfrom
731 GROUP BY messages.userid
732 ) messages2 ON m.id = messages2.mid AND (m.useridto = messages2.userid OR m.useridfrom = messages2.userid)
733 JOIN {user} u ON u.id = messages2.userid
734 LEFT JOIN {message_contacts} mc ON mc.userid = :userid3 AND mc.contactid = u.id
735 WHERE u.deleted = '0'
737 $unread = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
739 $conversations = array();
741 //Union the 2 result sets together looking for the message with the most recent timecreated for each other user
742 //$conversation->id (the array key) is the other user's ID
743 $conversation_arrays = array($unread, $read);
744 foreach ($conversation_arrays as $conversation_array) {
745 foreach ($conversation_array as $conversation) {
746 if (empty($conversations[$conversation->id]) || $conversations[$conversation->id]->timecreated < $conversation->timecreated ) {
747 $conversations[$conversation->id] = $conversation;
752 //Sort the conversations. This is a bit complicated as we need to sort by $conversation->timecreated
753 //and there may be multiple conversations with the same timecreated value.
754 //The conversations array contains both read and unread messages (different tables) so sorting by ID won't work
755 usort($conversations, "conversationsort");
757 return $conversations;
761 * Sort function used to order conversations
763 * @param object $a A conversation object
764 * @param object $b A conversation object
767 function conversationsort($a, $b)
769 if ($a->timecreated == $b->timecreated) {
772 return ($a->timecreated > $b->timecreated) ? -1 : 1;
776 * Get the users recent event notifications
778 * @param object $user the current user
779 * @param int $limitfrom can be used for paging
780 * @param int $limitto can be used for paging
783 function message_get_recent_notifications($user, $limitfrom=0, $limitto=100) {
786 $userfields = user_picture::fields('u', array('lastaccess'));
787 $sql = "SELECT mr.id AS message_read_id, $userfields, mr.smallmessage, mr.fullmessage, mr.timecreated as timecreated, mr.contexturl, mr.contexturlname
788 FROM {message_read} mr
789 JOIN {user} u ON u.id=mr.useridfrom
790 WHERE mr.useridto = :userid1 AND u.deleted = '0' AND mr.notification = :notification
791 ORDER BY mr.id DESC";//ordering by id should give the same result as ordering by timecreated but will be faster
792 $params = array('userid1' => $user->id, 'notification' => 1);
794 $notifications = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
795 return $notifications;
799 * Print the user's recent conversations
801 * @param stdClass $user the current user
802 * @param bool $showicontext flag indicating whether or not to show text next to the action icons
804 function message_print_recent_conversations($user=null, $showicontext=false) {
807 echo html_writer::start_tag('p', array('class' => 'heading'));
808 echo get_string('mostrecentconversations', 'message');
809 echo html_writer::end_tag('p');
815 $conversations = message_get_recent_conversations($user);
817 // Attach context url information to create the "View this conversation" type links
818 foreach($conversations as $conversation) {
819 $conversation->contexturl = new moodle_url("/message/index.php?user2={$conversation->id}");
820 $conversation->contexturlname = get_string('thisconversation', 'message');
823 $showotheruser = true;
824 message_print_recent_messages_table($conversations, $user, $showotheruser, $showicontext);
828 * Print the user's recent notifications
830 * @param stdClass $user the current user
832 function message_print_recent_notifications($user=null) {
835 echo html_writer::start_tag('p', array('class' => 'heading'));
836 echo get_string('mostrecentnotifications', 'message');
837 echo html_writer::end_tag('p');
843 $notifications = message_get_recent_notifications($user);
845 $showicontext = false;
846 $showotheruser = false;
847 message_print_recent_messages_table($notifications, $user, $showotheruser, $showicontext);
851 * Print a list of recent messages
853 * @param array $messages the messages to display
854 * @param object $user the current user
855 * @param bool $showotheruser display information on the other user?
856 * @param bool $showicontext show text next to the action icons?
859 function message_print_recent_messages_table($messages, $user=null, $showotheruser=true, $showicontext=false) {
863 if (empty($dateformat)) {
864 $dateformat = get_string('strftimedatetimeshort');
867 echo html_writer::start_tag('div', array('class' => 'messagerecent'));
868 foreach ($messages as $message) {
869 echo html_writer::start_tag('div', array('class' => 'singlemessage'));
871 if ($showotheruser) {
872 if ( $message->contactlistid ) {
873 if ($message->blocked == 0) { /// not blocked
874 $strcontact = message_contact_link($message->id, 'remove', true, null, $showicontext);
875 $strblock = message_contact_link($message->id, 'block', true, null, $showicontext);
877 $strcontact = message_contact_link($message->id, 'add', true, null, $showicontext);
878 $strblock = message_contact_link($message->id, 'unblock', true, null, $showicontext);
881 $strcontact = message_contact_link($message->id, 'add', true, null, $showicontext);
882 $strblock = message_contact_link($message->id, 'block', true, null, $showicontext);
885 //should we show just the icon or icon and text?
886 $histicontext = 'icon';
888 $histicontext = 'both';
890 $strhistory = message_history_link($user->id, $message->id, true, '', '', $histicontext);
892 echo html_writer::start_tag('span', array('class' => 'otheruser'));
894 echo html_writer::start_tag('span', array('class' => 'pix'));
895 echo $OUTPUT->user_picture($message, array('size' => 20, 'courseid' => SITEID));
896 echo html_writer::end_tag('span');
898 echo html_writer::start_tag('span', array('class' => 'contact'));
900 $link = new moodle_url("/message/index.php?id=$message->id");
902 echo $OUTPUT->action_link($link, fullname($message), $action, array('title' => get_string('sendmessageto', 'message', fullname($message))));
904 echo html_writer::end_tag('span');//end contact
906 echo $strcontact.$strblock.$strhistory;
907 echo html_writer::end_tag('span');//end otheruser
909 $messagetoprint = null;
910 if (!empty($message->smallmessage)) {
911 $messagetoprint = $message->smallmessage;
913 $messagetoprint = $message->fullmessage;
916 echo html_writer::tag('span', userdate($message->timecreated, $dateformat), array('class' => 'messagedate'));
917 echo html_writer::tag('span', format_text($messagetoprint, FORMAT_HTML), array('class' => 'themessage'));
918 echo message_format_contexturl($message);
919 echo html_writer::end_tag('div');//end singlemessage
921 echo html_writer::end_tag('div');//end messagerecent
925 * Add the selected user as a contact for the current user
927 * @param int $contactid the ID of the user to add as a contact
928 * @param int $blocked 1 if you wish to block the contact
929 * @return bool/int false if the $contactid isnt a valid user id. True if no changes made.
930 * Otherwise returns the result of update_record() or insert_record()
932 function message_add_contact($contactid, $blocked=0) {
935 if (!$DB->record_exists('user', array('id' => $contactid))) { // invalid userid
939 if (($contact = $DB->get_record('message_contacts', array('userid' => $USER->id, 'contactid' => $contactid))) !== false) {
940 /// record already exists - we may be changing blocking status
942 if ($contact->blocked !== $blocked) {
943 /// change to blocking status
944 $contact->blocked = $blocked;
945 return $DB->update_record('message_contacts', $contact);
947 /// no changes to blocking status
952 /// new contact record
953 $contact = new stdClass();
954 $contact->userid = $USER->id;
955 $contact->contactid = $contactid;
956 $contact->blocked = $blocked;
957 return $DB->insert_record('message_contacts', $contact, false);
964 * @param int $contactid the user ID of the contact to remove
965 * @return bool returns the result of delete_records()
967 function message_remove_contact($contactid) {
969 return $DB->delete_records('message_contacts', array('userid' => $USER->id, 'contactid' => $contactid));
973 * Unblock a contact. Note that this reverts the previously blocked user back to a non-contact.
975 * @param int $contactid the user ID of the contact to unblock
976 * @return bool returns the result of delete_records()
978 function message_unblock_contact($contactid) {
980 return $DB->delete_records('message_contacts', array('userid' => $USER->id, 'contactid' => $contactid));
986 * @param int $contactid the user ID of the user to block
988 function message_block_contact($contactid) {
989 return message_add_contact($contactid, 1);
993 * Load a user's contact record
995 * @param int $contactid the user ID of the user whose contact record you want
996 * @return array message contacts
998 function message_get_contact($contactid) {
1000 return $DB->get_record('message_contacts', array('userid' => $USER->id, 'contactid' => $contactid));
1004 * Print the results of a message search
1006 * @param mixed $frm submitted form data
1007 * @param bool $showicontext show text next to action icons?
1008 * @param object $currentuser the current user
1011 function message_print_search_results($frm, $showicontext=false, $currentuser=null) {
1012 global $USER, $DB, $OUTPUT;
1014 if (empty($currentuser)) {
1015 $currentuser = $USER;
1018 echo html_writer::start_tag('div', array('class' => 'mdl-left'));
1020 $personsearch = false;
1021 $personsearchstring = null;
1022 if (!empty($frm->personsubmit) and !empty($frm->name)) {
1023 $personsearch = true;
1024 $personsearchstring = $frm->name;
1025 } else if (!empty($frm->combinedsubmit) and !empty($frm->combinedsearch)) {
1026 $personsearch = true;
1027 $personsearchstring = $frm->combinedsearch;
1030 /// search for person
1031 if ($personsearch) {
1032 if (optional_param('mycourses', 0, PARAM_BOOL)) {
1034 $mycourses = enrol_get_my_courses();
1035 foreach ($mycourses as $mycourse) {
1036 if (is_array($susers = message_search_users($mycourse->id, $personsearchstring))) {
1037 foreach ($susers as $suser) $users[$suser->id] = $suser;
1041 $users = message_search_users(SITEID, $personsearchstring);
1044 if (!empty($users)) {
1045 echo html_writer::start_tag('p', array('class' => 'heading searchresultcount'));
1046 echo get_string('userssearchresults', 'message', count($users));
1047 echo html_writer::end_tag('p');
1049 echo html_writer::start_tag('table', array('class' => 'messagesearchresults'));
1050 foreach ($users as $user) {
1052 if ( $user->contactlistid ) {
1053 if ($user->blocked == 0) { /// not blocked
1054 $strcontact = message_contact_link($user->id, 'remove', true, null, $showicontext);
1055 $strblock = message_contact_link($user->id, 'block', true, null, $showicontext);
1057 $strcontact = message_contact_link($user->id, 'add', true, null, $showicontext);
1058 $strblock = message_contact_link($user->id, 'unblock', true, null, $showicontext);
1061 $strcontact = message_contact_link($user->id, 'add', true, null, $showicontext);
1062 $strblock = message_contact_link($user->id, 'block', true, null, $showicontext);
1065 //should we show just the icon or icon and text?
1066 $histicontext = 'icon';
1067 if ($showicontext) {
1068 $histicontext = 'both';
1070 $strhistory = message_history_link($USER->id, $user->id, true, '', '', $histicontext);
1072 echo html_writer::start_tag('tr');
1074 echo html_writer::start_tag('td', array('class' => 'pix'));
1075 echo $OUTPUT->user_picture($user, array('size' => 20, 'courseid' => SITEID));
1076 echo html_writer::end_tag('td');
1078 echo html_writer::start_tag('td',array('class' => 'contact'));
1080 $link = new moodle_url("/message/index.php?id=$user->id");
1081 echo $OUTPUT->action_link($link, fullname($user), $action, array('title' => get_string('sendmessageto', 'message', fullname($user))));
1082 echo html_writer::end_tag('td');
1084 echo html_writer::tag('td', $strcontact, array('class' => 'link'));
1085 echo html_writer::tag('td', $strblock, array('class' => 'link'));
1086 echo html_writer::tag('td', $strhistory, array('class' => 'link'));
1088 echo html_writer::end_tag('tr');
1090 echo html_writer::end_tag('table');
1093 echo html_writer::start_tag('p', array('class' => 'heading searchresultcount'));
1094 echo get_string('userssearchresults', 'message', 0).'<br /><br />';
1095 echo html_writer::end_tag('p');
1099 // search messages for keywords
1100 $messagesearch = false;
1101 $messagesearchstring = null;
1102 if (!empty($frm->keywords)) {
1103 $messagesearch = true;
1104 $messagesearchstring = clean_text(trim($frm->keywords));
1105 } else if (!empty($frm->combinedsubmit) and !empty($frm->combinedsearch)) {
1106 $messagesearch = true;
1107 $messagesearchstring = clean_text(trim($frm->combinedsearch));
1110 if ($messagesearch) {
1111 if ($messagesearchstring) {
1112 $keywords = explode(' ', $messagesearchstring);
1114 $keywords = array();
1120 if (empty($frm->keywordsoption)) {
1121 $frm->keywordsoption = 'allmine';
1124 switch ($frm->keywordsoption) {
1139 $courseid = $frm->courseid;
1146 if (($messages = message_search($keywords, $fromme, $tome, $courseid)) !== false) {
1148 /// get a list of contacts
1149 if (($contacts = $DB->get_records('message_contacts', array('userid' => $USER->id), '', 'contactid, blocked') ) === false) {
1150 $contacts = array();
1153 /// print heading with number of results
1154 echo html_writer::start_tag('p', array('class' => 'heading searchresultcount'));
1155 $countresults = count($messages);
1156 if ($countresults == MESSAGE_SEARCH_MAX_RESULTS) {
1157 echo get_string('keywordssearchresultstoomany', 'message', $countresults).' ("'.s($messagesearchstring).'")';
1159 echo get_string('keywordssearchresults', 'message', $countresults);
1161 echo html_writer::end_tag('p');
1163 /// print table headings
1164 echo html_writer::start_tag('table', array('class' => 'messagesearchresults', 'cellspacing' => '0'));
1166 $headertdstart = html_writer::start_tag('td', array('class' => 'messagesearchresultscol'));
1167 $headertdend = html_writer::end_tag('td');
1168 echo html_writer::start_tag('tr');
1169 echo $headertdstart.get_string('from').$headertdend;
1170 echo $headertdstart.get_string('to').$headertdend;
1171 echo $headertdstart.get_string('message', 'message').$headertdend;
1172 echo $headertdstart.get_string('timesent', 'message').$headertdend;
1173 echo html_writer::end_tag('tr');
1176 $dateformat = get_string('strftimedatetimeshort');
1177 $strcontext = get_string('context', 'message');
1178 foreach ($messages as $message) {
1180 /// ignore messages to and from blocked users unless $frm->includeblocked is set
1181 if (!optional_param('includeblocked', 0, PARAM_BOOL) and (
1182 ( isset($contacts[$message->useridfrom]) and ($contacts[$message->useridfrom]->blocked == 1)) or
1183 ( isset($contacts[$message->useridto] ) and ($contacts[$message->useridto]->blocked == 1))
1190 /// load up user to record
1191 if ($message->useridto !== $USER->id) {
1192 $userto = $DB->get_record('user', array('id' => $message->useridto));
1193 $tocontact = (array_key_exists($message->useridto, $contacts) and
1194 ($contacts[$message->useridto]->blocked == 0) );
1195 $toblocked = (array_key_exists($message->useridto, $contacts) and
1196 ($contacts[$message->useridto]->blocked == 1) );
1203 /// load up user from record
1204 if ($message->useridfrom !== $USER->id) {
1205 $userfrom = $DB->get_record('user', array('id' => $message->useridfrom));
1206 $fromcontact = (array_key_exists($message->useridfrom, $contacts) and
1207 ($contacts[$message->useridfrom]->blocked == 0) );
1208 $fromblocked = (array_key_exists($message->useridfrom, $contacts) and
1209 ($contacts[$message->useridfrom]->blocked == 1) );
1212 $fromcontact = false;
1213 $fromblocked = false;
1216 /// find date string for this message
1217 $date = usergetdate($message->timecreated);
1218 $datestring = $date['year'].$date['mon'].$date['mday'];
1220 /// print out message row
1221 echo html_writer::start_tag('tr', array('valign' => 'top'));
1223 echo html_writer::start_tag('td', array('class' => 'contact'));
1224 message_print_user($userfrom, $fromcontact, $fromblocked, $showicontext);
1225 echo html_writer::end_tag('td');
1227 echo html_writer::start_tag('td', array('class' => 'contact'));
1228 message_print_user($userto, $tocontact, $toblocked, $showicontext);
1229 echo html_writer::end_tag('td');
1231 echo html_writer::start_tag('td', array('class' => 'summary'));
1232 echo message_get_fragment($message->fullmessage, $keywords);
1233 echo html_writer::start_tag('div', array('class' => 'link'));
1235 //If the user clicks the context link display message sender on the left
1236 //EXCEPT if the current user is in the conversation. Current user == always on the left
1237 $leftsideuserid = $rightsideuserid = null;
1238 if ($currentuser->id == $message->useridto) {
1239 $leftsideuserid = $message->useridto;
1240 $rightsideuserid = $message->useridfrom;
1242 $leftsideuserid = $message->useridfrom;
1243 $rightsideuserid = $message->useridto;
1245 message_history_link($leftsideuserid, $rightsideuserid, false,
1246 $messagesearchstring, 'm'.$message->id, $strcontext);
1247 echo html_writer::end_tag('div');
1248 echo html_writer::end_tag('td');
1250 echo html_writer::tag('td', userdate($message->timecreated, $dateformat), array('class' => 'date'));
1252 echo html_writer::end_tag('tr');
1256 if ($blockedcount > 0) {
1257 echo html_writer::start_tag('tr');
1258 echo html_writer::tag('td', get_string('blockedmessages', 'message', $blockedcount), array('colspan' => 4, 'align' => 'center'));
1259 echo html_writer::end_tag('tr');
1261 echo html_writer::end_tag('table');
1264 echo html_writer::tag('p', get_string('keywordssearchresults', 'message', 0), array('class' => 'heading'));
1268 if (!$personsearch && !$messagesearch) {
1269 //they didn't enter any search terms
1270 echo $OUTPUT->notification(get_string('emptysearchstring', 'message'));
1273 echo html_writer::end_tag('div');
1277 * Print information on a user. Used when printing search results.
1279 * @param object/bool $user the user to display or false if you just want $USER
1280 * @param bool $iscontact is the user being displayed a contact?
1281 * @param bool $isblocked is the user being displayed blocked?
1282 * @param bool $includeicontext include text next to the action icons?
1285 function message_print_user ($user=false, $iscontact=false, $isblocked=false, $includeicontext=false) {
1286 global $USER, $OUTPUT;
1288 if ($user === false) {
1289 echo $OUTPUT->user_picture($USER, array('size' => 20, 'courseid' => SITEID));
1291 echo $OUTPUT->user_picture($user, array('size' => 20, 'courseid' => SITEID));
1297 message_contact_link($user->id, 'remove', $return, $script, $includeicontext);
1299 message_contact_link($user->id, 'add', $return, $script, $includeicontext);
1303 message_contact_link($user->id, 'unblock', $return, $script, $includeicontext);
1305 message_contact_link($user->id, 'block', $return, $script, $includeicontext);
1308 $popupoptions = array(
1309 'height' => MESSAGE_DISCUSSION_HEIGHT,
1310 'width' => MESSAGE_DISCUSSION_WIDTH,
1312 'location' => false,
1314 'scrollbars' => true,
1315 'resizable' => true);
1317 $link = new moodle_url("/message/index.php?id=$user->id");
1318 //$action = new popup_action('click', $link, "message_$user->id", $popupoptions);
1320 echo $OUTPUT->action_link($link, fullname($user), $action, array('title' => get_string('sendmessageto', 'message', fullname($user))));
1326 * Print a message contact link
1328 * @param int $userid the ID of the user to apply to action to
1329 * @param string $linktype can be add, remove, block or unblock
1330 * @param bool $return if true return the link as a string. If false echo the link.
1331 * @param string $script the URL to send the user to when the link is clicked. If null, the current page.
1332 * @param bool $text include text next to the icons?
1333 * @param bool $icon include a graphical icon?
1334 * @return string if $return is true otherwise bool
1336 function message_contact_link($userid, $linktype='add', $return=false, $script=null, $text=false, $icon=true) {
1337 global $OUTPUT, $PAGE;
1339 //hold onto the strings as we're probably creating a bunch of links
1342 if (empty($script)) {
1343 //strip off previous action params like 'removecontact'
1344 $script = message_remove_url_params($PAGE->url);
1347 if (empty($str->blockcontact)) {
1348 $str = new stdClass();
1349 $str->blockcontact = get_string('blockcontact', 'message');
1350 $str->unblockcontact = get_string('unblockcontact', 'message');
1351 $str->removecontact = get_string('removecontact', 'message');
1352 $str->addcontact = get_string('addcontact', 'message');
1355 $command = $linktype.'contact';
1356 $string = $str->{$command};
1358 $safealttext = s($string);
1361 if (!empty($text)) {
1362 $safestring = $safealttext;
1368 switch ($linktype) {
1370 $iconpath = 't/block';
1373 $iconpath = 't/userblue';
1376 $iconpath = 'i/cross_red_big';
1380 $iconpath = 't/addgreen';
1383 $img = '<img src="'.$OUTPUT->pix_url($iconpath).'" class="iconsmall" alt="'.$safealttext.'" />';
1386 $output = '<span class="'.$linktype.'contact">'.
1387 '<a href="'.$script.'&'.$command.'='.$userid.
1388 '&sesskey='.sesskey().'" title="'.$safealttext.'">'.
1390 $safestring.'</a></span>';
1401 * echo or return a link to take the user to the full message history between themselves and another user
1403 * @param int $userid1 the ID of the user displayed on the left (usually the current user)
1404 * @param int $userid2 the ID of the other user
1405 * @param bool $return true to return the link as a string. False to echo the link.
1406 * @param string $keywords any keywords to highlight in the message history
1407 * @param string $position anchor name to jump to within the message history
1408 * @param string $linktext optionally specify the link text
1409 * @return string|bool. Returns a string if $return is true. Otherwise returns a boolean.
1411 function message_history_link($userid1, $userid2, $return=false, $keywords='', $position='', $linktext='') {
1413 static $strmessagehistory;
1415 if (empty($strmessagehistory)) {
1416 $strmessagehistory = get_string('messagehistory', 'message');
1420 $position = "#$position";
1423 $keywords = "&search=".urlencode($keywords);
1426 if ($linktext == 'icon') { // Icon only
1427 $fulllink = '<img src="'.$OUTPUT->pix_url('t/log') . '" class="iconsmall" alt="'.$strmessagehistory.'" />';
1428 } else if ($linktext == 'both') { // Icon and standard name
1429 $fulllink = '<img src="'.$OUTPUT->pix_url('t/log') . '" class="iconsmall" alt="" />';
1430 $fulllink .= ' '.$strmessagehistory;
1431 } else if ($linktext) { // Custom name
1432 $fulllink = $linktext;
1433 } else { // Standard name only
1434 $fulllink = $strmessagehistory;
1437 $popupoptions = array(
1441 'location' => false,
1443 'scrollbars' => true,
1444 'resizable' => true);
1446 $link = new moodle_url('/message/index.php?history='.MESSAGE_HISTORY_ALL."&user1=$userid1&user2=$userid2$keywords$position");
1448 $str = $OUTPUT->action_link($link, $fulllink, $action, array('title' => $strmessagehistory));
1450 $str = '<span class="history">'.$str.'</span>';
1462 * Search through course users
1464 * If $coursid specifies the site course then this function searches
1465 * through all undeleted and confirmed users
1466 * @param int $courseid The course in question.
1467 * @param string $searchtext the text to search for
1468 * @param string $sort the column name to order by
1469 * @param string $exceptions comma separated list of user IDs to exclude
1470 * @return array An array of {@link $USER} records.
1472 function message_search_users($courseid, $searchtext, $sort='', $exceptions='') {
1473 global $CFG, $USER, $DB;
1475 $fullname = $DB->sql_fullname();
1477 if (!empty($exceptions)) {
1478 $except = ' AND u.id NOT IN ('. $exceptions .') ';
1483 if (!empty($sort)) {
1484 $order = ' ORDER BY '. $sort;
1489 $ufields = user_picture::fields('u');
1490 if (!$courseid or $courseid == SITEID) {
1491 $params = array($USER->id, "%$searchtext%");
1492 return $DB->get_records_sql("SELECT $ufields, mc.id as contactlistid, mc.blocked
1494 LEFT JOIN {message_contacts} mc
1495 ON mc.contactid = u.id AND mc.userid = ?
1496 WHERE u.deleted = '0' AND u.confirmed = '1'
1497 AND (".$DB->sql_like($fullname, '?', false).")
1501 //TODO: add enabled enrolment join here (skodak)
1502 $context = context_course::instance($courseid);
1503 $contextlists = get_related_contexts_string($context);
1505 // everyone who has a role assignment in this course or higher
1506 $params = array($USER->id, "%$searchtext%");
1507 $users = $DB->get_records_sql("SELECT DISTINCT $ufields, mc.id as contactlistid, mc.blocked
1509 JOIN {role_assignments} ra ON ra.userid = u.id
1510 LEFT JOIN {message_contacts} mc
1511 ON mc.contactid = u.id AND mc.userid = ?
1512 WHERE u.deleted = '0' AND u.confirmed = '1'
1513 AND ra.contextid $contextlists
1514 AND (".$DB->sql_like($fullname, '?', false).")
1523 * search a user's messages
1525 * @param array $searchterms an array of search terms (strings)
1526 * @param bool $fromme include messages from the user?
1527 * @param bool $tome include messages to the user?
1528 * @param mixed $courseid SITEID for admins searching all messages. Other behaviour not yet implemented
1529 * @param int $userid the user ID of the current user
1530 * @return mixed An array of messages or false if no matching messages were found
1532 function message_search($searchterms, $fromme=true, $tome=true, $courseid='none', $userid=0) {
1533 /// Returns a list of posts found using an array of search terms
1534 /// eg word +word -word
1536 global $CFG, $USER, $DB;
1538 // If user is searching all messages check they are allowed to before doing anything else
1539 if ($courseid == SITEID && !has_capability('moodle/site:readallmessages', context_system::instance())) {
1540 print_error('accessdenied','admin');
1543 /// If no userid sent then assume current user
1544 if ($userid == 0) $userid = $USER->id;
1546 /// Some differences in SQL syntax
1547 if ($DB->sql_regex_supported()) {
1548 $REGEXP = $DB->sql_regex(true);
1549 $NOTREGEXP = $DB->sql_regex(false);
1552 $searchcond = array();
1556 //preprocess search terms to check whether we have at least 1 eligible search term
1557 //if we do we can drop words around it like 'a'
1558 $dropshortwords = false;
1559 foreach ($searchterms as $searchterm) {
1560 if (strlen($searchterm) >= 2) {
1561 $dropshortwords = true;
1565 foreach ($searchterms as $searchterm) {
1568 $NOT = false; /// Initially we aren't going to perform NOT LIKE searches, only MSSQL and Oracle
1570 if ($dropshortwords && strlen($searchterm) < 2) {
1573 /// Under Oracle and MSSQL, trim the + and - operators and perform
1574 /// simpler LIKE search
1575 if (!$DB->sql_regex_supported()) {
1576 if (substr($searchterm, 0, 1) == '-') {
1579 $searchterm = trim($searchterm, '+-');
1582 if (substr($searchterm,0,1) == "+") {
1583 $searchterm = substr($searchterm,1);
1584 $searchterm = preg_quote($searchterm, '|');
1585 $searchcond[] = "m.fullmessage $REGEXP :ss$i";
1586 $params['ss'.$i] = "(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)";
1588 } else if (substr($searchterm,0,1) == "-") {
1589 $searchterm = substr($searchterm,1);
1590 $searchterm = preg_quote($searchterm, '|');
1591 $searchcond[] = "m.fullmessage $NOTREGEXP :ss$i";
1592 $params['ss'.$i] = "(^|[^a-zA-Z0-9])$searchterm([^a-zA-Z0-9]|$)";
1595 $searchcond[] = $DB->sql_like("m.fullmessage", ":ss$i", false, true, $NOT);
1596 $params['ss'.$i] = "%$searchterm%";
1600 if (empty($searchcond)) {
1601 $searchcond = " ".$DB->sql_like('m.fullmessage', ':ss1', false);
1602 $params['ss1'] = "%";
1604 $searchcond = implode(" AND ", $searchcond);
1607 /// There are several possibilities
1608 /// 1. courseid = SITEID : The admin is searching messages by all users
1609 /// 2. courseid = ?? : A teacher is searching messages by users in
1610 /// one of their courses - currently disabled
1611 /// 3. courseid = none : User is searching their own messages;
1612 /// a. Messages from user
1613 /// b. Messages to user
1614 /// c. Messages to and from user
1616 if ($courseid == SITEID) { /// admin is searching all messages
1617 $m_read = $DB->get_records_sql("SELECT m.id, m.useridto, m.useridfrom, m.fullmessage, m.timecreated
1618 FROM {message_read} m
1619 WHERE $searchcond", $params, 0, MESSAGE_SEARCH_MAX_RESULTS);
1620 $m_unread = $DB->get_records_sql("SELECT m.id, m.useridto, m.useridfrom, m.fullmessage, m.timecreated
1622 WHERE $searchcond", $params, 0, MESSAGE_SEARCH_MAX_RESULTS);
1624 } else if ($courseid !== 'none') {
1625 /// This has not been implemented due to security concerns
1627 $m_unread = array();
1631 if ($fromme and $tome) {
1632 $searchcond .= " AND (m.useridfrom=:userid1 OR m.useridto=:userid2)";
1633 $params['userid1'] = $userid;
1634 $params['userid2'] = $userid;
1636 } else if ($fromme) {
1637 $searchcond .= " AND m.useridfrom=:userid";
1638 $params['userid'] = $userid;
1641 $searchcond .= " AND m.useridto=:userid";
1642 $params['userid'] = $userid;
1645 $m_read = $DB->get_records_sql("SELECT m.id, m.useridto, m.useridfrom, m.fullmessage, m.timecreated
1646 FROM {message_read} m
1647 WHERE $searchcond", $params, 0, MESSAGE_SEARCH_MAX_RESULTS);
1648 $m_unread = $DB->get_records_sql("SELECT m.id, m.useridto, m.useridfrom, m.fullmessage, m.timecreated
1650 WHERE $searchcond", $params, 0, MESSAGE_SEARCH_MAX_RESULTS);
1654 /// The keys may be duplicated in $m_read and $m_unread so we can't
1655 /// do a simple concatenation
1656 $messages = array();
1657 foreach ($m_read as $m) {
1660 foreach ($m_unread as $m) {
1664 return (empty($messages)) ? false : $messages;
1668 * Given a message object that we already know has a long message
1669 * this function truncates the message nicely to the first
1670 * sane place between $CFG->forum_longpost and $CFG->forum_shortpost
1672 * @param string $message the message
1673 * @param int $minlength the minimum length to trim the message to
1674 * @return string the shortened message
1676 function message_shorten_message($message, $minlength = 0) {
1679 $length = strlen($message);
1683 if ($minlength == 0) $minlength = MESSAGE_SHORTLENGTH;
1686 for ($i=0; $i<$length; $i++) {
1687 $char = $message[$i];
1699 if ($char == '.' or $char == ' ') {
1709 if ($count > $minlength) {
1719 return substr($message, 0, $truncate);
1724 * Given a string and an array of keywords, this function looks
1725 * for the first keyword in the string, and then chops out a
1726 * small section from the text that shows that word in context.
1728 * @param string $message the text to search
1729 * @param array $keywords array of keywords to find
1731 function message_get_fragment($message, $keywords) {
1734 $halfsize = (int)($fullsize/2);
1736 $message = strip_tags($message);
1738 foreach ($keywords as $keyword) { // Just get the first one
1739 if ($keyword !== '') {
1743 if (empty($keyword)) { // None found, so just return start of message
1744 return message_shorten_message($message, 30);
1747 $leadin = $leadout = '';
1749 /// Find the start of the fragment
1751 $length = strlen($message);
1753 $pos = strpos($message, $keyword);
1754 if ($pos > $halfsize) {
1755 $start = $pos - $halfsize;
1758 /// Find the end of the fragment
1759 $end = $start + $fullsize;
1760 if ($end > $length) {
1766 /// Pull out the fragment and format it
1768 $fragment = substr($message, $start, $end - $start);
1769 $fragment = $leadin.highlight(implode(' ',$keywords), $fragment).$leadout;
1774 * Retrieve the messages between two users
1776 * @param object $user1 the current user
1777 * @param object $user2 the other user
1778 * @param int $limitnum the maximum number of messages to retrieve
1779 * @param bool $viewingnewmessages are we currently viewing new messages?
1781 function message_get_history($user1, $user2, $limitnum=0, $viewingnewmessages=false) {
1784 $messages = array();
1786 //we want messages sorted oldest to newest but if getting a subset of messages we need to sort
1787 //desc to get the last $limitnum messages then flip the order in php
1793 $notificationswhere = null;
1794 //we have just moved new messages to read. If theyre here to see new messages dont hide notifications
1795 if (!$viewingnewmessages && $CFG->messaginghidereadnotifications) {
1796 $notificationswhere = 'AND notification=0';
1799 //prevent notifications of your own actions appearing in your own message history
1800 $ownnotificationwhere = ' AND NOT (useridfrom=? AND notification=1)';
1802 if ($messages_read = $DB->get_records_select('message_read', "((useridto = ? AND useridfrom = ?) OR
1803 (useridto = ? AND useridfrom = ?)) $notificationswhere $ownnotificationwhere",
1804 array($user1->id, $user2->id, $user2->id, $user1->id, $user1->id),
1805 "timecreated $sort", '*', 0, $limitnum)) {
1806 foreach ($messages_read as $message) {
1807 $messages[$message->timecreated] = $message;
1810 if ($messages_new = $DB->get_records_select('message', "((useridto = ? AND useridfrom = ?) OR
1811 (useridto = ? AND useridfrom = ?)) $ownnotificationwhere",
1812 array($user1->id, $user2->id, $user2->id, $user1->id, $user1->id),
1813 "timecreated $sort", '*', 0, $limitnum)) {
1814 foreach ($messages_new as $message) {
1815 $messages[$message->timecreated] = $message;
1819 //if we only want the last $limitnum messages
1821 $messagecount = count($messages);
1822 if ($limitnum>0 && $messagecount>$limitnum) {
1823 $messages = array_slice($messages, $messagecount-$limitnum, $limitnum, true);
1830 * Print the message history between two users
1832 * @param object $user1 the current user
1833 * @param object $user2 the other user
1834 * @param string $search search terms to highlight
1835 * @param int $messagelimit maximum number of messages to return
1836 * @param string $messagehistorylink the html for the message history link or false
1837 * @param bool $viewingnewmessages are we currently viewing new messages?
1839 function message_print_message_history($user1,$user2,$search='',$messagelimit=0, $messagehistorylink=false, $viewingnewmessages=false) {
1840 global $CFG, $OUTPUT;
1842 echo $OUTPUT->box_start('center');
1843 echo html_writer::start_tag('table', array('cellpadding' => '10', 'class' => 'message_user_pictures'));
1844 echo html_writer::start_tag('tr');
1846 echo html_writer::start_tag('td', array('align' => 'center', 'id' => 'user1'));
1847 echo $OUTPUT->user_picture($user1, array('size' => 100, 'courseid' => SITEID));
1848 echo html_writer::tag('div', fullname($user1), array('class' => 'heading'));
1849 echo html_writer::end_tag('td');
1851 echo html_writer::start_tag('td', array('align' => 'center'));
1852 echo html_writer::empty_tag('img', array('src' => $OUTPUT->pix_url('t/left'), 'alt' => get_string('from')));
1853 echo html_writer::empty_tag('img', array('src' => $OUTPUT->pix_url('t/right'), 'alt' => get_string('to')));
1854 echo html_writer::end_tag('td');
1856 echo html_writer::start_tag('td', array('align' => 'center', 'id' => 'user2'));
1857 echo $OUTPUT->user_picture($user2, array('size' => 100, 'courseid' => SITEID));
1858 echo html_writer::tag('div', fullname($user2), array('class' => 'heading'));
1860 if (isset($user2->iscontact) && isset($user2->isblocked)) {
1861 $incontactlist = $user2->iscontact;
1862 $isblocked = $user2->isblocked;
1868 $strcontact = message_get_contact_add_remove_link($incontactlist, $isblocked, $user2, $script, $text, $icon);
1869 $strblock = message_get_contact_block_link($incontactlist, $isblocked, $user2, $script, $text, $icon);
1870 $useractionlinks = $strcontact.' |'.$strblock;
1872 echo html_writer::tag('div', $useractionlinks, array('class' => 'useractionlinks'));
1875 echo html_writer::end_tag('td');
1876 echo html_writer::end_tag('tr');
1877 echo html_writer::end_tag('table');
1878 echo $OUTPUT->box_end();
1880 if (!empty($messagehistorylink)) {
1881 echo $messagehistorylink;
1884 /// Get all the messages and print them
1885 if ($messages = message_get_history($user1, $user2, $messagelimit, $viewingnewmessages)) {
1886 $tablecontents = '';
1888 $current = new stdClass();
1889 $current->mday = '';
1890 $current->month = '';
1891 $current->year = '';
1892 $messagedate = get_string('strftimetime');
1893 $blockdate = get_string('strftimedaydate');
1894 foreach ($messages as $message) {
1895 if ($message->notification) {
1896 $notificationclass = ' notification';
1898 $notificationclass = null;
1900 $date = usergetdate($message->timecreated);
1901 if ($current->mday != $date['mday'] | $current->month != $date['month'] | $current->year != $date['year']) {
1902 $current->mday = $date['mday'];
1903 $current->month = $date['month'];
1904 $current->year = $date['year'];
1906 $datestring = html_writer::empty_tag('a', array('name' => $date['year'].$date['mon'].$date['mday']));
1907 $tablecontents .= html_writer::tag('div', $datestring, array('class' => 'mdl-align heading'));
1909 $tablecontents .= $OUTPUT->heading(userdate($message->timecreated, $blockdate), 4, 'mdl-align');
1912 $formatted_message = $side = null;
1913 if ($message->useridfrom == $user1->id) {
1914 $formatted_message = message_format_message($message, $messagedate, $search, 'me');
1917 $formatted_message = message_format_message($message, $messagedate, $search, 'other');
1920 $tablecontents .= html_writer::tag('div', $formatted_message, array('class' => "mdl-left $side $notificationclass"));
1923 echo html_writer::nonempty_tag('div', $tablecontents, array('class' => 'mdl-left messagehistory'));
1925 echo html_writer::nonempty_tag('div', '('.get_string('nomessagesfound', 'message').')', array('class' => 'mdl-align messagehistory'));
1930 * Format a message for display in the message history
1932 * @param object $message the message object
1933 * @param string $format optional date format
1934 * @param string $keywords keywords to highlight
1935 * @param string $class CSS class to apply to the div around the message
1936 * @return string the formatted message
1938 function message_format_message($message, $format='', $keywords='', $class='other') {
1942 //if we haven't previously set the date format or they've supplied a new one
1943 if ( empty($dateformat) || (!empty($format) && $dateformat != $format) ) {
1945 $dateformat = $format;
1947 $dateformat = get_string('strftimedatetimeshort');
1950 $time = userdate($message->timecreated, $dateformat);
1951 $options = new stdClass();
1952 $options->para = false;
1954 //if supplied display small messages as fullmessage may contain boilerplate text that shouldnt appear in the messaging UI
1955 if (!empty($message->smallmessage)) {
1956 $messagetext = $message->smallmessage;
1958 $messagetext = $message->fullmessage;
1960 if ($message->fullmessageformat == FORMAT_HTML) {
1961 //dont escape html tags by calling s() if html format or they will display in the UI
1962 $messagetext = html_to_text(format_text($messagetext, $message->fullmessageformat, $options));
1964 $messagetext = format_text(s($messagetext), $message->fullmessageformat, $options);
1967 $messagetext .= message_format_contexturl($message);
1970 $messagetext = highlight($keywords, $messagetext);
1974 <div class='message $class'>
1975 <a name="m'.{$message->id}.'"></a>
1976 <span class="message-meta"><span class="time">$time</span></span>: <span class="text">$messagetext</span>
1982 * Format a the context url and context url name of a message for display
1984 * @param object $message the message object
1985 * @return string the formatted string
1987 function message_format_contexturl($message) {
1990 if (!empty($message->contexturl)) {
1991 $displaytext = null;
1992 if (!empty($message->contexturlname)) {
1993 $displaytext= $message->contexturlname;
1995 $displaytext= $message->contexturl;
1997 $s .= html_writer::start_tag('div',array('class' => 'messagecontext'));
1998 $s .= get_string('view').': '.html_writer::tag('a', $displaytext, array('href' => $message->contexturl));
1999 $s .= html_writer::end_tag('div');
2006 * Send a message from one user to another. Will be delivered according to the message recipients messaging preferences
2008 * @param object $userfrom the message sender
2009 * @param object $userto the message recipient
2010 * @param string $message the message
2011 * @param int $format message format such as FORMAT_PLAIN or FORMAT_HTML
2012 * @return int|false the ID of the new message or false
2014 function message_post_message($userfrom, $userto, $message, $format) {
2015 global $SITE, $CFG, $USER;
2017 $eventdata = new stdClass();
2018 $eventdata->component = 'moodle';
2019 $eventdata->name = 'instantmessage';
2020 $eventdata->userfrom = $userfrom;
2021 $eventdata->userto = $userto;
2023 //using string manager directly so that strings in the message will be in the message recipients language rather than the senders
2024 $eventdata->subject = get_string_manager()->get_string('unreadnewmessage', 'message', fullname($userfrom), $userto->lang);
2026 if ($format == FORMAT_HTML) {
2027 $eventdata->fullmessagehtml = $message;
2028 //some message processors may revert to sending plain text even if html is supplied
2029 //so we keep both plain and html versions if we're intending to send html
2030 $eventdata->fullmessage = html_to_text($eventdata->fullmessagehtml);
2032 $eventdata->fullmessage = $message;
2033 $eventdata->fullmessagehtml = '';
2036 $eventdata->fullmessageformat = $format;
2037 $eventdata->smallmessage = $message;//store the message unfiltered. Clean up on output.
2039 $s = new stdClass();
2040 $s->sitename = format_string($SITE->shortname, true, array('context' => context_course::instance(SITEID)));
2041 $s->url = $CFG->wwwroot.'/message/index.php?user='.$userto->id.'&id='.$userfrom->id;
2043 $emailtagline = get_string_manager()->get_string('emailtagline', 'message', $s, $userto->lang);
2044 if (!empty($eventdata->fullmessage)) {
2045 $eventdata->fullmessage .= "\n\n---------------------------------------------------------------------\n".$emailtagline;
2047 if (!empty($eventdata->fullmessagehtml)) {
2048 $eventdata->fullmessagehtml .= "<br /><br />---------------------------------------------------------------------<br />".$emailtagline;
2051 $eventdata->timecreated = time();
2052 return message_send($eventdata);
2056 * Print a row of contactlist displaying user picture, messages waiting and
2059 * @param object $contact contact object containing all fields required for $OUTPUT->user_picture()
2060 * @param bool $incontactlist is the user a contact of ours?
2061 * @param bool $isblocked is the user blocked?
2062 * @param string $selectcontacturl the url to send the user to when a contact's name is clicked
2063 * @param bool $showactionlinks display action links next to the other users (add contact, block user etc)
2064 * @param object $selecteduser the user the current user is viewing (if any). They will be highlighted.
2067 function message_print_contactlist_user($contact, $incontactlist = true, $isblocked = false, $selectcontacturl = null, $showactionlinks = true, $selecteduser=null) {
2068 global $OUTPUT, $USER;
2069 $fullname = fullname($contact);
2070 $fullnamelink = $fullname;
2073 if (!empty($selecteduser) && $contact->id == $selecteduser->id) {
2074 $linkclass = 'messageselecteduser';
2077 /// are there any unread messages for this contact?
2078 if ($contact->messagecount > 0 ){
2079 $fullnamelink = '<strong>'.$fullnamelink.' ('.$contact->messagecount.')</strong>';
2082 $strcontact = $strblock = $strhistory = null;
2084 if ($showactionlinks) {
2085 $strcontact = message_get_contact_add_remove_link($incontactlist, $isblocked, $contact);
2086 $strblock = message_get_contact_block_link($incontactlist, $isblocked, $contact);
2087 $strhistory = message_history_link($USER->id, $contact->id, true, '', '', 'icon');
2090 echo html_writer::start_tag('tr');
2091 echo html_writer::start_tag('td', array('class' => 'pix'));
2092 echo $OUTPUT->user_picture($contact, array('size' => 20, 'courseid' => SITEID));
2093 echo html_writer::end_tag('td');
2095 echo html_writer::start_tag('td', array('class' => 'contact'));
2097 $popupoptions = array(
2098 'height' => MESSAGE_DISCUSSION_HEIGHT,
2099 'width' => MESSAGE_DISCUSSION_WIDTH,
2101 'location' => false,
2103 'scrollbars' => true,
2104 'resizable' => true);
2106 $link = $action = null;
2107 if (!empty($selectcontacturl)) {
2108 $link = new moodle_url($selectcontacturl.'&user2='.$contact->id);
2110 //can $selectcontacturl be removed and maybe the be removed and hardcoded?
2111 $link = new moodle_url("/message/index.php?id=$contact->id");
2112 $action = new popup_action('click', $link, "message_$contact->id", $popupoptions);
2114 echo $OUTPUT->action_link($link, $fullnamelink, $action, array('class' => $linkclass,'title' => get_string('sendmessageto', 'message', $fullname)));
2116 echo html_writer::end_tag('td');
2118 echo html_writer::tag('td', ' '.$strcontact.$strblock.' '.$strhistory, array('class' => 'link'));
2120 echo html_writer::end_tag('tr');
2124 * Constructs the add/remove contact link to display next to other users
2126 * @param bool $incontactlist is the user a contact
2127 * @param bool $isblocked is the user blocked
2128 * @param stdClass $contact contact object
2129 * @param string $script the URL to send the user to when the link is clicked. If null, the current page.
2130 * @param bool $text include text next to the icons?
2131 * @param bool $icon include a graphical icon?
2134 function message_get_contact_add_remove_link($incontactlist, $isblocked, $contact, $script=null, $text=false, $icon=true) {
2138 $strcontact = message_contact_link($contact->id, 'remove', true, $script, $text, $icon);
2139 } else if ($isblocked) {
2140 $strcontact = message_contact_link($contact->id, 'add', true, $script, $text, $icon);
2142 $strcontact = message_contact_link($contact->id, 'add', true, $script, $text, $icon);
2149 * Constructs the block contact link to display next to other users
2151 * @param bool $incontactlist is the user a contact?
2152 * @param bool $isblocked is the user blocked?
2153 * @param stdClass $contact contact object
2154 * @param string $script the URL to send the user to when the link is clicked. If null, the current page.
2155 * @param bool $text include text next to the icons?
2156 * @param bool $icon include a graphical icon?
2159 function message_get_contact_block_link($incontactlist, $isblocked, $contact, $script=null, $text=false, $icon=true) {
2162 //commented out to allow the user to block a contact without having to remove them first
2163 /*if ($incontactlist) {
2167 $strblock = ' '.message_contact_link($contact->id, 'unblock', true, $script, $text, $icon);
2169 $strblock = ' '.message_contact_link($contact->id, 'block', true, $script, $text, $icon);
2176 * Moves messages from a particular user from the message table (unread messages) to message_read
2177 * This is typically only used when a user is deleted
2179 * @param object $userid User id
2180 * @return boolean success
2182 function message_move_userfrom_unread2read($userid) {
2185 // move all unread messages from message table to message_read
2186 if ($messages = $DB->get_records_select('message', 'useridfrom = ?', array($userid), 'timecreated')) {
2187 foreach ($messages as $message) {
2188 message_mark_message_read($message, 0); //set timeread to 0 as the message was never read
2195 * marks ALL messages being sent from $fromuserid to $touserid as read
2197 * @param int $touserid the id of the message recipient
2198 * @param int $fromuserid the id of the message sender
2201 function message_mark_messages_read($touserid, $fromuserid){
2204 $sql = 'SELECT m.* FROM {message} m WHERE m.useridto=:useridto AND m.useridfrom=:useridfrom';
2205 $messages = $DB->get_recordset_sql($sql, array('useridto' => $touserid,'useridfrom' => $fromuserid));
2207 foreach ($messages as $message) {
2208 message_mark_message_read($message, time());
2215 * Mark a single message as read
2217 * @param stdClass $message An object with an object property ie $message->id which is an id in the message table
2218 * @param int $timeread the timestamp for when the message should be marked read. Usually time().
2219 * @param bool $messageworkingempty Is the message_working table already confirmed empty for this message?
2220 * @return int the ID of the message in the message_read table
2222 function message_mark_message_read($message, $timeread, $messageworkingempty=false) {
2225 $message->timeread = $timeread;
2227 $messageid = $message->id;
2228 unset($message->id);//unset because it will get a new id on insert into message_read
2230 //If any processors have pending actions abort them
2231 if (!$messageworkingempty) {
2232 $DB->delete_records('message_working', array('unreadmessageid' => $messageid));
2234 $messagereadid = $DB->insert_record('message_read', $message);
2235 $DB->delete_records('message', array('id' => $messageid));
2236 return $messagereadid;
2240 * A helper function that prints a formatted heading
2242 * @param string $title the heading to display
2243 * @param int $colspan
2246 function message_print_heading($title, $colspan=3) {
2247 echo html_writer::start_tag('tr');
2248 echo html_writer::tag('td', $title, array('colspan' => $colspan, 'class' => 'heading'));
2249 echo html_writer::end_tag('tr');
2253 * Get all message processors, validate corresponding plugin existance and
2254 * system configuration
2256 * @param bool $ready only return ready-to-use processors
2257 * @return mixed $processors array of objects containing information on message processors
2259 function get_message_processors($ready = false) {
2264 if (empty($processors)) {
2265 // Get all processors, ensure the name column is the first so it will be the array key
2266 $processors = $DB->get_records('message_processors', null, 'name DESC', 'name, id, enabled');
2267 foreach ($processors as &$processor){
2268 $processorfile = $CFG->dirroot. '/message/output/'.$processor->name.'/message_output_'.$processor->name.'.php';
2269 if (is_readable($processorfile)) {
2270 include_once($processorfile);
2271 $processclass = 'message_output_' . $processor->name;
2272 if (class_exists($processclass)) {
2273 $pclass = new $processclass();
2274 $processor->object = $pclass;
2275 $processor->configured = 0;
2276 if ($pclass->is_system_configured()) {
2277 $processor->configured = 1;
2279 $processor->hassettings = 0;
2280 if (is_readable($CFG->dirroot.'/message/output/'.$processor->name.'/settings.php')) {
2281 $processor->hassettings = 1;
2283 $processor->available = 1;
2285 print_error('errorcallingprocessor', 'message');
2288 $processor->available = 0;
2293 // Filter out enabled and system_configured processors
2294 $readyprocessors = $processors;
2295 foreach ($readyprocessors as $readyprocessor) {
2296 if (!($readyprocessor->enabled && $readyprocessor->configured)) {
2297 unset($readyprocessors[$readyprocessor->name]);
2300 return $readyprocessors;
2307 * Get all message providers, validate their plugin existance and
2308 * system configuration
2310 * @return mixed $processors array of objects containing information on message processors
2312 function get_message_providers() {
2314 require_once($CFG->libdir . '/pluginlib.php');
2315 $pluginman = plugin_manager::instance();
2317 $providers = $DB->get_records('message_providers', null, 'name');
2319 // Remove all the providers whose plugins are disabled or don't exist
2320 foreach ($providers as $providerid => $provider) {
2321 $plugin = $pluginman->get_plugin_info($provider->component);
2323 if ($plugin->get_status() === plugin_manager::PLUGIN_STATUS_MISSING) {
2324 unset($providers[$providerid]); // Plugins does not exist
2327 if ($plugin->is_enabled() === false) {
2328 unset($providers[$providerid]); // Plugin disabled
2337 * Get an instance of the message_output class for one of the output plugins.
2338 * @param string $type the message output type. E.g. 'email' or 'jabber'.
2339 * @return message_output message_output the requested class.
2341 function get_message_processor($type) {
2344 // Note, we cannot use the get_message_processors function here, becaues this
2345 // code is called during install after installing each messaging plugin, and
2346 // get_message_processors caches the list of installed plugins.
2348 $processorfile = $CFG->dirroot . "/message/output/{$type}/message_output_{$type}.php";
2349 if (!is_readable($processorfile)) {
2350 throw new coding_exception('Unknown message processor type ' . $type);
2353 include_once($processorfile);
2355 $processclass = 'message_output_' . $type;
2356 if (!class_exists($processclass)) {
2357 throw new coding_exception('Message processor ' . $type .
2358 ' does not define the right class');
2361 return new $processclass();
2365 * Get messaging outputs default (site) preferences
2367 * @return object $processors object containing information on message processors
2369 function get_message_output_default_preferences() {
2370 return get_config('message');
2374 * Translate message default settings from binary value to the array of string
2375 * representing the settings to be stored. Also validate the provided value and
2376 * use default if it is malformed.
2378 * @param int $plugindefault Default setting suggested by plugin
2379 * @param string $processorname The name of processor
2380 * @return array $settings array of strings in the order: $permitted, $loggedin, $loggedoff.
2382 function translate_message_default_setting($plugindefault, $processorname) {
2383 // Preset translation arrays
2384 $permittedvalues = array(
2385 0x04 => 'disallowed',
2386 0x08 => 'permitted',
2390 $loggedinstatusvalues = array(
2391 0x00 => null, // use null if loggedin/loggedoff is not defined
2393 0x02 => 'loggedoff',
2396 // define the default setting
2397 $processor = get_message_processor($processorname);
2398 $default = $processor->get_default_messaging_settings();
2400 // Validate the value. It should not exceed the maximum size
2401 if (!is_int($plugindefault) || ($plugindefault > 0x0f)) {
2402 debugging(get_string('errortranslatingdefault', 'message'));
2403 $plugindefault = $default;
2405 // Use plugin default setting of 'permitted' is 0
2406 if (!($plugindefault & MESSAGE_PERMITTED_MASK)) {
2407 $plugindefault = $default;
2410 $permitted = $permittedvalues[$plugindefault & MESSAGE_PERMITTED_MASK];
2411 $loggedin = $loggedoff = null;
2413 if (($plugindefault & MESSAGE_PERMITTED_MASK) == MESSAGE_PERMITTED) {
2414 $loggedin = $loggedinstatusvalues[$plugindefault & MESSAGE_DEFAULT_LOGGEDIN];
2415 $loggedoff = $loggedinstatusvalues[$plugindefault & MESSAGE_DEFAULT_LOGGEDOFF];
2418 return array($permitted, $loggedin, $loggedoff);
2422 * Return a list of page types
2423 * @param string $pagetype current page type
2424 * @param stdClass $parentcontext Block's parent context
2425 * @param stdClass $currentcontext Current context of block
2427 function message_page_type_list($pagetype, $parentcontext, $currentcontext) {
2428 return array('messages-*'=>get_string('page-message-x', 'message'));
2432 * Is $USER one of the supplied users?
2434 * $user2 will be null if viewing a user's recent conversations
2436 * @param stdClass the first user
2437 * @param stdClass the second user or null
2438 * @return bool True if the current user is one of either $user1 or $user2
2440 function message_current_user_is_involved($user1, $user2) {
2443 if (empty($user1->id) || (!empty($user2) && empty($user2->id))) {
2444 throw new coding_exception('Invalid user object detected. Missing id.');
2447 if ($user1->id != $USER->id && (empty($user2) || $user2->id != $USER->id)) {