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Developer Documentation
See Release Notes
Long Term Support Release
- Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
- Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/mod/chat/ -> lib.php (source)
Differences Between: [Versions 39 and 311] [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]
1 <?php 2 // This file is part of Moodle - http://moodle.org/ 3 // 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. 8 // 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. 13 // 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/>. 16 17 /** 18 * Library of functions and constants for module chat 19 * 20 * @package mod_chat 21 * @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com} 22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 23 */ 24 25 defined('MOODLE_INTERNAL') || die(); 26 27 require_once($CFG->dirroot.'/calendar/lib.php'); 28 29 // Event types. 30 define('CHAT_EVENT_TYPE_CHATTIME', 'chattime'); 31 32 // Gap between sessions. 5 minutes or more of idleness between messages in a chat means the messages belong in different sessions. 33 define('CHAT_SESSION_GAP', 300); 34 35 // The HTML head for the message window to start with (<!-- nix --> is used to get some browsers starting with output. 36 global $CHAT_HTMLHEAD; 37 $CHAT_HTMLHEAD = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\"><html><head></head>\n<body>\n\n".padding(200); 38 39 // The HTML head for the message window to start with (with js scrolling). 40 global $CHAT_HTMLHEAD_JS; 41 $CHAT_HTMLHEAD_JS = <<<EOD 42 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> 43 <html><head><script type="text/javascript"> 44 //<![CDATA[ 45 function move() { 46 if (scroll_active) 47 window.scroll(1,400000); 48 window.setTimeout("move()",100); 49 } 50 var scroll_active = true; 51 move(); 52 //]]> 53 </script> 54 </head> 55 <body onBlur="scroll_active = true" onFocus="scroll_active = false"> 56 EOD; 57 global $CHAT_HTMLHEAD_JS; 58 $CHAT_HTMLHEAD_JS .= padding(200); 59 60 // The HTML code for standard empty pages (e.g. if a user was kicked out). 61 global $CHAT_HTMLHEAD_OUT; 62 $CHAT_HTMLHEAD_OUT = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\"><html><head><title>You are out!</title></head><body></body></html>"; 63 64 // The HTML head for the message input page. 65 global $CHAT_HTMLHEAD_MSGINPUT; 66 $CHAT_HTMLHEAD_MSGINPUT = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\"><html><head><title>Message Input</title></head><body>"; 67 68 // The HTML code for the message input page, with JavaScript. 69 global $CHAT_HTMLHEAD_MSGINPUT_JS; 70 $CHAT_HTMLHEAD_MSGINPUT_JS = <<<EOD 71 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> 72 <html> 73 <head><title>Message Input</title> 74 <script type="text/javascript"> 75 //<![CDATA[ 76 scroll_active = true; 77 function empty_field_and_submit() { 78 document.fdummy.arsc_message.value=document.f.arsc_message.value; 79 document.fdummy.submit(); 80 document.f.arsc_message.focus(); 81 document.f.arsc_message.select(); 82 return false; 83 } 84 //]]> 85 </script> 86 </head><body OnLoad="document.f.arsc_message.focus();document.f.arsc_message.select();">; 87 EOD; 88 89 // Dummy data that gets output to the browser as needed, in order to make it show output. 90 global $CHAT_DUMMY_DATA; 91 $CHAT_DUMMY_DATA = padding(200); 92 93 /** 94 * @param int $n 95 * @return string 96 */ 97 function padding($n) { 98 $str = ''; 99 for ($i = 0; $i < $n; $i++) { 100 $str .= "<!-- nix -->\n"; 101 } 102 return $str; 103 } 104 105 /** 106 * Given an object containing all the necessary data, 107 * (defined by the form in mod_form.php) this function 108 * will create a new instance and return the id number 109 * of the new instance. 110 * 111 * @global object 112 * @param object $chat 113 * @return int 114 */ 115 function chat_add_instance($chat) { 116 global $DB; 117 118 $chat->timemodified = time(); 119 120 $returnid = $DB->insert_record("chat", $chat); 121 122 if ($chat->schedule > 0) { 123 $event = new stdClass(); 124 $event->type = CALENDAR_EVENT_TYPE_ACTION; 125 $event->name = $chat->name; 126 $event->description = format_module_intro('chat', $chat, $chat->coursemodule, false); 127 $event->format = FORMAT_HTML; 128 $event->courseid = $chat->course; 129 $event->groupid = 0; 130 $event->userid = 0; 131 $event->modulename = 'chat'; 132 $event->instance = $returnid; 133 $event->eventtype = CHAT_EVENT_TYPE_CHATTIME; 134 $event->timestart = $chat->chattime; 135 $event->timesort = $chat->chattime; 136 $event->timeduration = 0; 137 138 calendar_event::create($event, false); 139 } 140 141 if (!empty($chat->completionexpected)) { 142 \core_completion\api::update_completion_date_event($chat->coursemodule, 'chat', $returnid, $chat->completionexpected); 143 } 144 145 return $returnid; 146 } 147 148 /** 149 * Given an object containing all the necessary data, 150 * (defined by the form in mod_form.php) this function 151 * will update an existing instance with new data. 152 * 153 * @global object 154 * @param object $chat 155 * @return bool 156 */ 157 function chat_update_instance($chat) { 158 global $DB; 159 160 $chat->timemodified = time(); 161 $chat->id = $chat->instance; 162 163 $DB->update_record("chat", $chat); 164 165 $event = new stdClass(); 166 167 if ($event->id = $DB->get_field('event', 'id', array('modulename' => 'chat', 168 'instance' => $chat->id, 'eventtype' => CHAT_EVENT_TYPE_CHATTIME))) { 169 170 if ($chat->schedule > 0) { 171 $event->type = CALENDAR_EVENT_TYPE_ACTION; 172 $event->name = $chat->name; 173 $event->description = format_module_intro('chat', $chat, $chat->coursemodule, false); 174 $event->format = FORMAT_HTML; 175 $event->timestart = $chat->chattime; 176 $event->timesort = $chat->chattime; 177 178 $calendarevent = calendar_event::load($event->id); 179 $calendarevent->update($event, false); 180 } else { 181 // Do not publish this event, so delete it. 182 $calendarevent = calendar_event::load($event->id); 183 $calendarevent->delete(); 184 } 185 } else { 186 // No event, do we need to create one? 187 if ($chat->schedule > 0) { 188 $event = new stdClass(); 189 $event->type = CALENDAR_EVENT_TYPE_ACTION; 190 $event->name = $chat->name; 191 $event->description = format_module_intro('chat', $chat, $chat->coursemodule, false); 192 $event->format = FORMAT_HTML; 193 $event->courseid = $chat->course; 194 $event->groupid = 0; 195 $event->userid = 0; 196 $event->modulename = 'chat'; 197 $event->instance = $chat->id; 198 $event->eventtype = CHAT_EVENT_TYPE_CHATTIME; 199 $event->timestart = $chat->chattime; 200 $event->timesort = $chat->chattime; 201 $event->timeduration = 0; 202 203 calendar_event::create($event, false); 204 } 205 } 206 207 $completionexpected = (!empty($chat->completionexpected)) ? $chat->completionexpected : null; 208 \core_completion\api::update_completion_date_event($chat->coursemodule, 'chat', $chat->id, $completionexpected); 209 210 return true; 211 } 212 213 /** 214 * Given an ID of an instance of this module, 215 * this function will permanently delete the instance 216 * and any data that depends on it. 217 * 218 * @global object 219 * @param int $id 220 * @return bool 221 */ 222 function chat_delete_instance($id) { 223 global $DB; 224 225 if (! $chat = $DB->get_record('chat', array('id' => $id))) { 226 return false; 227 } 228 229 $result = true; 230 231 // Delete any dependent records here. 232 233 if (! $DB->delete_records('chat', array('id' => $chat->id))) { 234 $result = false; 235 } 236 if (! $DB->delete_records('chat_messages', array('chatid' => $chat->id))) { 237 $result = false; 238 } 239 if (! $DB->delete_records('chat_messages_current', array('chatid' => $chat->id))) { 240 $result = false; 241 } 242 if (! $DB->delete_records('chat_users', array('chatid' => $chat->id))) { 243 $result = false; 244 } 245 246 if (! $DB->delete_records('event', array('modulename' => 'chat', 'instance' => $chat->id))) { 247 $result = false; 248 } 249 250 return $result; 251 } 252 253 /** 254 * Given a course and a date, prints a summary of all chat rooms past and present 255 * This function is called from block_recent_activity 256 * 257 * @global object 258 * @global object 259 * @global object 260 * @param object $course 261 * @param bool $viewfullnames 262 * @param int|string $timestart Timestamp 263 * @return bool 264 */ 265 function chat_print_recent_activity($course, $viewfullnames, $timestart) { 266 global $CFG, $USER, $DB, $OUTPUT; 267 268 // This is approximate only, but it is really fast. 269 $timeout = $CFG->chat_old_ping * 10; 270 271 if (!$mcms = $DB->get_records_sql("SELECT cm.id, MAX(chm.timestamp) AS lasttime 272 FROM {course_modules} cm 273 JOIN {modules} md ON md.id = cm.module 274 JOIN {chat} ch ON ch.id = cm.instance 275 JOIN {chat_messages} chm ON chm.chatid = ch.id 276 WHERE chm.timestamp > ? AND ch.course = ? AND md.name = 'chat' 277 GROUP BY cm.id 278 ORDER BY lasttime ASC", array($timestart, $course->id))) { 279 return false; 280 } 281 282 $past = array(); 283 $current = array(); 284 $modinfo = get_fast_modinfo($course); // Reference needed because we might load the groups. 285 286 foreach ($mcms as $cmid => $mcm) { 287 if (!array_key_exists($cmid, $modinfo->cms)) { 288 continue; 289 } 290 $cm = $modinfo->cms[$cmid]; 291 if (!$modinfo->cms[$cm->id]->uservisible) { 292 continue; 293 } 294 295 if (groups_get_activity_groupmode($cm) != SEPARATEGROUPS 296 or has_capability('moodle/site:accessallgroups', context_module::instance($cm->id))) { 297 if ($timeout > time() - $mcm->lasttime) { 298 $current[] = $cm; 299 } else { 300 $past[] = $cm; 301 } 302 303 continue; 304 } 305 306 // Verify groups in separate mode. 307 if (!$mygroupids = $modinfo->get_groups($cm->groupingid)) { 308 continue; 309 } 310 311 // Ok, last post was not for my group - we have to query db to get last message from one of my groups. 312 // The only minor problem is that the order will not be correct. 313 $mygroupids = implode(',', $mygroupids); 314 315 if (!$mcm = $DB->get_record_sql("SELECT cm.id, MAX(chm.timestamp) AS lasttime 316 FROM {course_modules} cm 317 JOIN {chat} ch ON ch.id = cm.instance 318 JOIN {chat_messages_current} chm ON chm.chatid = ch.id 319 WHERE chm.timestamp > ? AND cm.id = ? AND 320 (chm.groupid IN ($mygroupids) OR chm.groupid = 0) 321 GROUP BY cm.id", array($timestart, $cm->id))) { 322 continue; 323 } 324 325 $mcms[$cmid]->lasttime = $mcm->lasttime; 326 if ($timeout > time() - $mcm->lasttime) { 327 $current[] = $cm; 328 } else { 329 $past[] = $cm; 330 } 331 } 332 333 if (!$past and !$current) { 334 return false; 335 } 336 337 $strftimerecent = get_string('strftimerecent'); 338 339 if ($past) { 340 echo $OUTPUT->heading(get_string("pastchats", 'chat') . ':', 6); 341 342 foreach ($past as $cm) { 343 $link = $CFG->wwwroot.'/mod/chat/view.php?id='.$cm->id; 344 $date = userdate($mcms[$cm->id]->lasttime, $strftimerecent); 345 echo '<div class="head"><div class="date">'.$date.'</div></div>'; 346 echo '<div class="info"><a href="'.$link.'">'.format_string($cm->name, true).'</a></div>'; 347 } 348 } 349 350 if ($current) { 351 echo $OUTPUT->heading(get_string("currentchats", 'chat') . ':', 6); 352 353 $oldest = floor((time() - $CFG->chat_old_ping) / 10) * 10; // Better db caching. 354 355 $timeold = time() - $CFG->chat_old_ping; 356 $timeold = floor($timeold / 10) * 10; // Better db caching. 357 $timeoldext = time() - ($CFG->chat_old_ping * 10); // JSless gui_basic needs much longer timeouts. 358 $timeoldext = floor($timeoldext / 10) * 10; // Better db caching. 359 360 $params = array('timeold' => $timeold, 'timeoldext' => $timeoldext, 'cmid' => $cm->id); 361 362 $timeout = "AND ((chu.version<>'basic' AND chu.lastping>:timeold) OR (chu.version='basic' AND chu.lastping>:timeoldext))"; 363 364 foreach ($current as $cm) { 365 // Count users first. 366 $mygroupids = $modinfo->groups[$cm->groupingid]; 367 if (!empty($mygroupids)) { 368 list($subquery, $subparams) = $DB->get_in_or_equal($mygroupids, SQL_PARAMS_NAMED, 'gid'); 369 $params += $subparams; 370 $groupselect = "AND (chu.groupid $subquery OR chu.groupid = 0)"; 371 } else { 372 $groupselect = ""; 373 } 374 375 $userfields = user_picture::fields('u'); 376 if (!$users = $DB->get_records_sql("SELECT $userfields 377 FROM {course_modules} cm 378 JOIN {chat} ch ON ch.id = cm.instance 379 JOIN {chat_users} chu ON chu.chatid = ch.id 380 JOIN {user} u ON u.id = chu.userid 381 WHERE cm.id = :cmid $timeout $groupselect 382 GROUP BY $userfields", $params)) { 383 } 384 385 $link = $CFG->wwwroot.'/mod/chat/view.php?id='.$cm->id; 386 $date = userdate($mcms[$cm->id]->lasttime, $strftimerecent); 387 388 echo '<div class="head"><div class="date">'.$date.'</div></div>'; 389 echo '<div class="info"><a href="'.$link.'">'.format_string($cm->name, true).'</a></div>'; 390 echo '<div class="userlist">'; 391 if ($users) { 392 echo '<ul>'; 393 foreach ($users as $user) { 394 echo '<li>'.fullname($user, $viewfullnames).'</li>'; 395 } 396 echo '</ul>'; 397 } 398 echo '</div>'; 399 } 400 } 401 402 return true; 403 } 404 405 /** 406 * This standard function will check all instances of this module 407 * and make sure there are up-to-date events created for each of them. 408 * If courseid = 0, then every chat event in the site is checked, else 409 * only chat events belonging to the course specified are checked. 410 * This function is used, in its new format, by restore_refresh_events() 411 * 412 * @global object 413 * @param int $courseid 414 * @param int|stdClass $instance Chat module instance or ID. 415 * @param int|stdClass $cm Course module object or ID. 416 * @return bool 417 */ 418 function chat_refresh_events($courseid = 0, $instance = null, $cm = null) { 419 global $DB; 420 421 // If we have instance information then we can just update the one event instead of updating all events. 422 if (isset($instance)) { 423 if (!is_object($instance)) { 424 $instance = $DB->get_record('chat', array('id' => $instance), '*', MUST_EXIST); 425 } 426 if (isset($cm)) { 427 if (!is_object($cm)) { 428 chat_prepare_update_events($instance); 429 return true; 430 } else { 431 chat_prepare_update_events($instance, $cm); 432 return true; 433 } 434 } 435 } 436 437 if ($courseid) { 438 if (! $chats = $DB->get_records("chat", array("course" => $courseid))) { 439 return true; 440 } 441 } else { 442 if (! $chats = $DB->get_records("chat")) { 443 return true; 444 } 445 } 446 foreach ($chats as $chat) { 447 chat_prepare_update_events($chat); 448 } 449 return true; 450 } 451 452 /** 453 * Updates both the normal and completion calendar events for chat. 454 * 455 * @param stdClass $chat The chat object (from the DB) 456 * @param stdClass $cm The course module object. 457 */ 458 function chat_prepare_update_events($chat, $cm = null) { 459 global $DB; 460 if (!isset($cm)) { 461 $cm = get_coursemodule_from_instance('chat', $chat->id, $chat->course); 462 } 463 $event = new stdClass(); 464 $event->name = $chat->name; 465 $event->type = CALENDAR_EVENT_TYPE_ACTION; 466 $event->description = format_module_intro('chat', $chat, $cm->id, false); 467 $event->format = FORMAT_HTML; 468 $event->timestart = $chat->chattime; 469 $event->timesort = $chat->chattime; 470 if ($event->id = $DB->get_field('event', 'id', array('modulename' => 'chat', 'instance' => $chat->id, 471 'eventtype' => CHAT_EVENT_TYPE_CHATTIME))) { 472 $calendarevent = calendar_event::load($event->id); 473 $calendarevent->update($event, false); 474 } else if ($chat->schedule > 0) { 475 // The chat is scheduled and the event should be published. 476 $event->courseid = $chat->course; 477 $event->groupid = 0; 478 $event->userid = 0; 479 $event->modulename = 'chat'; 480 $event->instance = $chat->id; 481 $event->eventtype = CHAT_EVENT_TYPE_CHATTIME; 482 $event->timeduration = 0; 483 $event->visible = $cm->visible; 484 calendar_event::create($event, false); 485 } 486 } 487 488 // Functions that require some SQL. 489 490 /** 491 * @global object 492 * @param int $chatid 493 * @param int $groupid 494 * @param int $groupingid 495 * @return array 496 */ 497 function chat_get_users($chatid, $groupid=0, $groupingid=0) { 498 global $DB; 499 500 $params = array('chatid' => $chatid, 'groupid' => $groupid, 'groupingid' => $groupingid); 501 502 if ($groupid) { 503 $groupselect = " AND (c.groupid=:groupid OR c.groupid='0')"; 504 } else { 505 $groupselect = ""; 506 } 507 508 if (!empty($groupingid)) { 509 $groupingjoin = "JOIN {groups_members} gm ON u.id = gm.userid 510 JOIN {groupings_groups} gg ON gm.groupid = gg.groupid AND gg.groupingid = :groupingid "; 511 512 } else { 513 $groupingjoin = ''; 514 } 515 516 $ufields = user_picture::fields('u'); 517 return $DB->get_records_sql("SELECT DISTINCT $ufields, c.lastmessageping, c.firstping 518 FROM {chat_users} c 519 JOIN {user} u ON u.id = c.userid $groupingjoin 520 WHERE c.chatid = :chatid $groupselect 521 ORDER BY c.firstping ASC", $params); 522 } 523 524 /** 525 * @global object 526 * @param int $chatid 527 * @param int $groupid 528 * @return array 529 */ 530 function chat_get_latest_message($chatid, $groupid=0) { 531 global $DB; 532 533 $params = array('chatid' => $chatid, 'groupid' => $groupid); 534 535 if ($groupid) { 536 $groupselect = "AND (groupid=:groupid OR groupid=0)"; 537 } else { 538 $groupselect = ""; 539 } 540 541 $sql = "SELECT * 542 FROM {chat_messages_current} WHERE chatid = :chatid $groupselect 543 ORDER BY timestamp DESC, id DESC"; 544 545 // Return the lastest one message. 546 return $DB->get_record_sql($sql, $params, true); 547 } 548 549 /** 550 * login if not already logged in 551 * 552 * @global object 553 * @global object 554 * @param int $chatid 555 * @param string $version 556 * @param int $groupid 557 * @param object $course 558 * @return bool|int Returns the chat users sid or false 559 */ 560 function chat_login_user($chatid, $version, $groupid, $course) { 561 global $USER, $DB; 562 563 if (($version != 'sockets') and $chatuser = $DB->get_record('chat_users', array('chatid' => $chatid, 564 'userid' => $USER->id, 565 'groupid' => $groupid))) { 566 // This will update logged user information. 567 $chatuser->version = $version; 568 $chatuser->ip = $USER->lastip; 569 $chatuser->lastping = time(); 570 $chatuser->lang = current_language(); 571 572 // Sometimes $USER->lastip is not setup properly during login. 573 // Update with current value if possible or provide a dummy value for the db. 574 if (empty($chatuser->ip)) { 575 $chatuser->ip = getremoteaddr(); 576 } 577 578 if (($chatuser->course != $course->id) or ($chatuser->userid != $USER->id)) { 579 return false; 580 } 581 $DB->update_record('chat_users', $chatuser); 582 583 } else { 584 $chatuser = new stdClass(); 585 $chatuser->chatid = $chatid; 586 $chatuser->userid = $USER->id; 587 $chatuser->groupid = $groupid; 588 $chatuser->version = $version; 589 $chatuser->ip = $USER->lastip; 590 $chatuser->lastping = $chatuser->firstping = $chatuser->lastmessageping = time(); 591 $chatuser->sid = random_string(32); 592 $chatuser->course = $course->id; // Caching - needed for current_language too. 593 $chatuser->lang = current_language(); // Caching - to resource intensive to find out later. 594 595 // Sometimes $USER->lastip is not setup properly during login. 596 // Update with current value if possible or provide a dummy value for the db. 597 if (empty($chatuser->ip)) { 598 $chatuser->ip = getremoteaddr(); 599 } 600 601 $DB->insert_record('chat_users', $chatuser); 602 603 if ($version == 'sockets') { 604 // Do not send 'enter' message, chatd will do it. 605 } else { 606 chat_send_chatmessage($chatuser, 'enter', true); 607 } 608 } 609 610 return $chatuser->sid; 611 } 612 613 /** 614 * Delete the old and in the way 615 * 616 * @global object 617 * @global object 618 */ 619 function chat_delete_old_users() { 620 // Delete the old and in the way. 621 global $CFG, $DB; 622 623 $timeold = time() - $CFG->chat_old_ping; 624 $timeoldext = time() - ($CFG->chat_old_ping * 10); // JSless gui_basic needs much longer timeouts. 625 626 $query = "(version<>'basic' AND lastping<?) OR (version='basic' AND lastping<?)"; 627 $params = array($timeold, $timeoldext); 628 629 if ($oldusers = $DB->get_records_select('chat_users', $query, $params) ) { 630 $DB->delete_records_select('chat_users', $query, $params); 631 foreach ($oldusers as $olduser) { 632 chat_send_chatmessage($olduser, 'exit', true); 633 } 634 } 635 } 636 637 /** 638 * Updates chat records so that the next chat time is correct 639 * 640 * @global object 641 * @param int $chatid 642 * @return void 643 */ 644 function chat_update_chat_times($chatid=0) { 645 // Updates chat records so that the next chat time is correct. 646 global $DB; 647 648 $timenow = time(); 649 650 $params = array('timenow' => $timenow, 'chatid' => $chatid); 651 652 if ($chatid) { 653 if (!$chats[] = $DB->get_record_select("chat", "id = :chatid AND chattime <= :timenow AND schedule > 0", $params)) { 654 return; 655 } 656 } else { 657 if (!$chats = $DB->get_records_select("chat", "chattime <= :timenow AND schedule > 0", $params)) { 658 return; 659 } 660 } 661 662 foreach ($chats as $chat) { 663 switch ($chat->schedule) { 664 case 1: // Single event - turn off schedule and disable. 665 $chat->chattime = 0; 666 $chat->schedule = 0; 667 break; 668 case 2: // Repeat daily. 669 while ($chat->chattime <= $timenow) { 670 $chat->chattime += 24 * 3600; 671 } 672 break; 673 case 3: // Repeat weekly. 674 while ($chat->chattime <= $timenow) { 675 $chat->chattime += 7 * 24 * 3600; 676 } 677 break; 678 } 679 $DB->update_record("chat", $chat); 680 681 $event = new stdClass(); // Update calendar too. 682 683 $cond = "modulename='chat' AND instance = :chatid AND timestart <> :chattime"; 684 $params = array('chattime' => $chat->chattime, 'chatid' => $chat->id); 685 686 if ($event->id = $DB->get_field_select('event', 'id', $cond, $params)) { 687 $event->timestart = $chat->chattime; 688 $event->timesort = $chat->chattime; 689 $calendarevent = calendar_event::load($event->id); 690 $calendarevent->update($event, false); 691 } 692 } 693 } 694 695 /** 696 * Send a message on the chat. 697 * 698 * @param object $chatuser The chat user record. 699 * @param string $messagetext The message to be sent. 700 * @param bool $issystem False for non-system messages, true for system messages. 701 * @param object $cm The course module object, pass it to save a database query when we trigger the event. 702 * @return int The message ID. 703 * @since Moodle 2.6 704 */ 705 function chat_send_chatmessage($chatuser, $messagetext, $issystem = false, $cm = null) { 706 global $DB; 707 708 $message = new stdClass(); 709 $message->chatid = $chatuser->chatid; 710 $message->userid = $chatuser->userid; 711 $message->groupid = $chatuser->groupid; 712 $message->message = $messagetext; 713 $message->issystem = $issystem ? 1 : 0; 714 $message->timestamp = time(); 715 716 $messageid = $DB->insert_record('chat_messages', $message); 717 $DB->insert_record('chat_messages_current', $message); 718 $message->id = $messageid; 719 720 if (!$issystem) { 721 722 if (empty($cm)) { 723 $cm = get_coursemodule_from_instance('chat', $chatuser->chatid, $chatuser->course); 724 } 725 726 $params = array( 727 'context' => context_module::instance($cm->id), 728 'objectid' => $message->id, 729 // We set relateduserid, because when triggered from the chat daemon, the event userid is null. 730 'relateduserid' => $chatuser->userid 731 ); 732 $event = \mod_chat\event\message_sent::create($params); 733 $event->add_record_snapshot('chat_messages', $message); 734 $event->trigger(); 735 } 736 737 return $message->id; 738 } 739 740 /** 741 * @global object 742 * @global object 743 * @param object $message 744 * @param int $courseid 745 * @param object $sender 746 * @param object $currentuser 747 * @param string $chatlastrow 748 * @return bool|string Returns HTML or false 749 */ 750 function chat_format_message_manually($message, $courseid, $sender, $currentuser, $chatlastrow = null) { 751 global $CFG, $USER, $OUTPUT; 752 753 $output = new stdClass(); 754 $output->beep = false; // By default. 755 $output->refreshusers = false; // By default. 756 757 // Find the correct timezone for displaying this message. 758 $tz = core_date::get_user_timezone($currentuser); 759 760 $message->strtime = userdate($message->timestamp, get_string('strftimemessage', 'chat'), $tz); 761 762 $message->picture = $OUTPUT->user_picture($sender, array('size' => false, 'courseid' => $courseid, 'link' => false)); 763 764 if ($courseid) { 765 $message->picture = "<a onclick=\"window.open('$CFG->wwwroot/user/view.php?id=$sender->id&course=$courseid')\"". 766 " href=\"$CFG->wwwroot/user/view.php?id=$sender->id&course=$courseid\">$message->picture</a>"; 767 } 768 769 // Calculate the row class. 770 if ($chatlastrow !== null) { 771 $rowclass = ' class="r'.$chatlastrow.'" '; 772 } else { 773 $rowclass = ''; 774 } 775 776 // Start processing the message. 777 778 if (!empty($message->issystem)) { 779 // System event. 780 $output->text = $message->strtime.': '.get_string('message'.$message->message, 'chat', fullname($sender)); 781 $output->html = '<table class="chat-event"><tr'.$rowclass.'><td class="picture">'.$message->picture.'</td>'; 782 $output->html .= '<td class="text"><span class="event">'.$output->text.'</span></td></tr></table>'; 783 $output->basic = '<tr class="r1"> 784 <th scope="row" class="cell c1 title"></th> 785 <td class="cell c2 text">' . get_string('message'.$message->message, 'chat', fullname($sender)) . '</td> 786 <td class="cell c3">' . $message->strtime . '</td> 787 </tr>'; 788 if ($message->message == 'exit' or $message->message == 'enter') { 789 $output->refreshusers = true; // Force user panel refresh ASAP. 790 } 791 return $output; 792 } 793 794 // It's not a system event. 795 $rawtext = trim($message->message); 796 797 // Options for format_text, when we get to it... 798 // format_text call will parse the text to clean and filter it. 799 // It cannot be called here as HTML-isation interferes with special case 800 // recognition, but *must* be called on any user-sourced text to be inserted 801 // into $outmain. 802 $options = new stdClass(); 803 $options->para = false; 804 $options->blanktarget = true; 805 806 // And now check for special cases. 807 $patternto = '#^\s*To\s([^:]+):(.*)#'; 808 $special = false; 809 810 if (substr($rawtext, 0, 5) == 'beep ') { 811 // It's a beep! 812 $special = true; 813 $beepwho = trim(substr($rawtext, 5)); 814 815 if ($beepwho == 'all') { // Everyone. 816 $outinfobasic = get_string('messagebeepseveryone', 'chat', fullname($sender)); 817 $outinfo = $message->strtime . ': ' . $outinfobasic; 818 $outmain = ''; 819 820 $output->beep = true; // Eventually this should be set to a filename uploaded by the user. 821 822 } else if ($beepwho == $currentuser->id) { // Current user. 823 $outinfobasic = get_string('messagebeepsyou', 'chat', fullname($sender)); 824 $outinfo = $message->strtime . ': ' . $outinfobasic; 825 $outmain = ''; 826 $output->beep = true; 827 828 } else { // Something is not caught? 829 return false; 830 } 831 } else if (substr($rawtext, 0, 1) == '/') { // It's a user command. 832 $special = true; 833 $pattern = '#(^\/)(\w+).*#'; 834 preg_match($pattern, $rawtext, $matches); 835 $command = isset($matches[2]) ? $matches[2] : false; 836 // Support some IRC commands. 837 switch ($command) { 838 case 'me': 839 $outinfo = $message->strtime; 840 $text = '*** <b>'.$sender->firstname.' '.substr($rawtext, 4).'</b>'; 841 $outmain = format_text($text, FORMAT_MOODLE, $options, $courseid); 842 break; 843 default: 844 // Error, we set special back to false to use the classic message output. 845 $special = false; 846 break; 847 } 848 } else if (preg_match($patternto, $rawtext)) { 849 $special = true; 850 $matches = array(); 851 preg_match($patternto, $rawtext, $matches); 852 if (isset($matches[1]) && isset($matches[2])) { 853 $text = format_text($matches[2], FORMAT_MOODLE, $options, $courseid); 854 $outinfo = $message->strtime; 855 $outmain = $sender->firstname.' '.get_string('saidto', 'chat').' <i>'.$matches[1].'</i>: '.$text; 856 } else { 857 // Error, we set special back to false to use the classic message output. 858 $special = false; 859 } 860 } 861 862 if (!$special) { 863 $text = format_text($rawtext, FORMAT_MOODLE, $options, $courseid); 864 $outinfo = $message->strtime.' '.$sender->firstname; 865 $outmain = $text; 866 } 867 868 // Format the message as a small table. 869 870 $output->text = strip_tags($outinfo.': '.$outmain); 871 872 $output->html = "<table class=\"chat-message\"><tr$rowclass><td class=\"picture\" valign=\"top\">$message->picture</td>"; 873 $output->html .= "<td class=\"text\"><span class=\"title\">$outinfo</span>"; 874 if ($outmain) { 875 $output->html .= ": $outmain"; 876 $output->basic = '<tr class="r0"> 877 <th scope="row" class="cell c1 title">' . $sender->firstname . '</th> 878 <td class="cell c2 text">' . $outmain . '</td> 879 <td class="cell c3">' . $message->strtime . '</td> 880 </tr>'; 881 } else { 882 $output->basic = '<tr class="r1"> 883 <th scope="row" class="cell c1 title"></th> 884 <td class="cell c2 text">' . $outinfobasic . '</td> 885 <td class="cell c3">' . $message->strtime . '</td> 886 </tr>'; 887 } 888 $output->html .= "</td></tr></table>"; 889 return $output; 890 } 891 892 /** 893 * Given a message object this function formats it appropriately into text and html then returns the formatted data 894 * @global object 895 * @param object $message 896 * @param int $courseid 897 * @param object $currentuser 898 * @param string $chatlastrow 899 * @return bool|string Returns HTML or false 900 */ 901 function chat_format_message($message, $courseid, $currentuser, $chatlastrow=null) { 902 global $DB; 903 904 static $users; // Cache user lookups. 905 906 if (isset($users[$message->userid])) { 907 $user = $users[$message->userid]; 908 } else if ($user = $DB->get_record('user', array('id' => $message->userid), user_picture::fields())) { 909 $users[$message->userid] = $user; 910 } else { 911 return null; 912 } 913 return chat_format_message_manually($message, $courseid, $user, $currentuser, $chatlastrow); 914 } 915 916 /** 917 * @global object 918 * @param object $message message to be displayed. 919 * @param mixed $chatuser user chat data 920 * @param object $currentuser current user for whom the message should be displayed. 921 * @param int $groupingid course module grouping id 922 * @param string $theme name of the chat theme. 923 * @return bool|string Returns HTML or false 924 */ 925 function chat_format_message_theme ($message, $chatuser, $currentuser, $groupingid, $theme = 'bubble') { 926 global $CFG, $USER, $OUTPUT, $COURSE, $DB, $PAGE; 927 require_once($CFG->dirroot.'/mod/chat/locallib.php'); 928 929 static $users; // Cache user lookups. 930 931 $result = new stdClass(); 932 933 if (file_exists($CFG->dirroot . '/mod/chat/gui_ajax/theme/'.$theme.'/config.php')) { 934 include($CFG->dirroot . '/mod/chat/gui_ajax/theme/'.$theme.'/config.php'); 935 } 936 937 if (isset($users[$message->userid])) { 938 $sender = $users[$message->userid]; 939 } else if ($sender = $DB->get_record('user', array('id' => $message->userid), user_picture::fields())) { 940 $users[$message->userid] = $sender; 941 } else { 942 return null; 943 } 944 945 // Find the correct timezone for displaying this message. 946 $tz = core_date::get_user_timezone($currentuser); 947 948 if (empty($chatuser->course)) { 949 $courseid = $COURSE->id; 950 } else { 951 $courseid = $chatuser->course; 952 } 953 954 $message->strtime = userdate($message->timestamp, get_string('strftimemessage', 'chat'), $tz); 955 $message->picture = $OUTPUT->user_picture($sender, array('courseid' => $courseid)); 956 957 $message->picture = "<a target='_blank'". 958 " href=\"$CFG->wwwroot/user/view.php?id=$sender->id&course=$courseid\">$message->picture</a>"; 959 960 // Start processing the message. 961 if (!empty($message->issystem)) { 962 $result->type = 'system'; 963 964 $senderprofile = $CFG->wwwroot.'/user/view.php?id='.$sender->id.'&course='.$courseid; 965 $event = get_string('message'.$message->message, 'chat', fullname($sender)); 966 $eventmessage = new event_message($senderprofile, fullname($sender), $message->strtime, $event, $theme); 967 968 $output = $PAGE->get_renderer('mod_chat'); 969 $result->html = $output->render($eventmessage); 970 971 return $result; 972 } 973 974 // It's not a system event. 975 $rawtext = trim($message->message); 976 977 // Options for format_text, when we get to it... 978 // format_text call will parse the text to clean and filter it. 979 // It cannot be called here as HTML-isation interferes with special case 980 // recognition, but *must* be called on any user-sourced text to be inserted 981 // into $outmain. 982 $options = new stdClass(); 983 $options->para = false; 984 $options->blanktarget = true; 985 986 // And now check for special cases. 987 $special = false; 988 $outtime = $message->strtime; 989 990 // Initialise variables. 991 $outmain = ''; 992 $patternto = '#^\s*To\s([^:]+):(.*)#'; 993 994 if (substr($rawtext, 0, 5) == 'beep ') { 995 $special = true; 996 // It's a beep! 997 $result->type = 'beep'; 998 $beepwho = trim(substr($rawtext, 5)); 999 1000 if ($beepwho == 'all') { // Everyone. 1001 $outmain = get_string('messagebeepseveryone', 'chat', fullname($sender)); 1002 } else if ($beepwho == $currentuser->id) { // Current user. 1003 $outmain = get_string('messagebeepsyou', 'chat', fullname($sender)); 1004 } else if ($sender->id == $currentuser->id) { // Something is not caught? 1005 // Allow beep for a active chat user only, else user can beep anyone and get fullname. 1006 if (!empty($chatuser) && is_numeric($beepwho)) { 1007 $chatusers = chat_get_users($chatuser->chatid, $chatuser->groupid, $groupingid); 1008 if (array_key_exists($beepwho, $chatusers)) { 1009 $outmain = get_string('messageyoubeep', 'chat', fullname($chatusers[$beepwho])); 1010 } else { 1011 $outmain = get_string('messageyoubeep', 'chat', $beepwho); 1012 } 1013 } else { 1014 $outmain = get_string('messageyoubeep', 'chat', $beepwho); 1015 } 1016 } 1017 } else if (substr($rawtext, 0, 1) == '/') { // It's a user command. 1018 $special = true; 1019 $result->type = 'command'; 1020 $pattern = '#(^\/)(\w+).*#'; 1021 preg_match($pattern, $rawtext, $matches); 1022 $command = isset($matches[2]) ? $matches[2] : false; 1023 // Support some IRC commands. 1024 switch ($command) { 1025 case 'me': 1026 $text = '*** <b>'.$sender->firstname.' '.substr($rawtext, 4).'</b>'; 1027 $outmain = format_text($text, FORMAT_MOODLE, $options, $courseid); 1028 break; 1029 default: 1030 // Error, we set special back to false to use the classic message output. 1031 $special = false; 1032 break; 1033 } 1034 } else if (preg_match($patternto, $rawtext)) { 1035 $special = true; 1036 $result->type = 'dialogue'; 1037 $matches = array(); 1038 preg_match($patternto, $rawtext, $matches); 1039 if (isset($matches[1]) && isset($matches[2])) { 1040 $text = format_text($matches[2], FORMAT_MOODLE, $options, $courseid); 1041 $outmain = $sender->firstname.' <b>'.get_string('saidto', 'chat').'</b> <i>'.$matches[1].'</i>: '.$text; 1042 } else { 1043 // Error, we set special back to false to use the classic message output. 1044 $special = false; 1045 } 1046 } 1047 1048 if (!$special) { 1049 $text = format_text($rawtext, FORMAT_MOODLE, $options, $courseid); 1050 $outmain = $text; 1051 } 1052 1053 $result->text = strip_tags($outtime.': '.$outmain); 1054 1055 $mymessageclass = ''; 1056 if ($sender->id == $USER->id) { 1057 $mymessageclass = 'chat-message-mymessage'; 1058 } 1059 1060 $senderprofile = $CFG->wwwroot.'/user/view.php?id='.$sender->id.'&course='.$courseid; 1061 $usermessage = new user_message($senderprofile, fullname($sender), $message->picture, 1062 $mymessageclass, $outtime, $outmain, $theme); 1063 1064 $output = $PAGE->get_renderer('mod_chat'); 1065 $result->html = $output->render($usermessage); 1066 1067 // When user beeps other user, then don't show any timestamp to other users in chat. 1068 if (('' === $outmain) && $special) { 1069 return false; 1070 } else { 1071 return $result; 1072 } 1073 } 1074 1075 /** 1076 * @global object $DB 1077 * @global object $CFG 1078 * @global object $COURSE 1079 * @global object $OUTPUT 1080 * @param object $users 1081 * @param object $course 1082 * @return array return formatted user list 1083 */ 1084 function chat_format_userlist($users, $course) { 1085 global $CFG, $DB, $COURSE, $OUTPUT; 1086 $result = array(); 1087 foreach ($users as $user) { 1088 $item = array(); 1089 $item['name'] = fullname($user); 1090 $item['url'] = $CFG->wwwroot.'/user/view.php?id='.$user->id.'&course='.$course->id; 1091 $item['picture'] = $OUTPUT->user_picture($user); 1092 $item['id'] = $user->id; 1093 $result[] = $item; 1094 } 1095 return $result; 1096 } 1097 1098 /** 1099 * Print json format error 1100 * @param string $level 1101 * @param string $msg 1102 */ 1103 function chat_print_error($level, $msg) { 1104 header('Content-Length: ' . ob_get_length() ); 1105 $error = new stdClass(); 1106 $error->level = $level; 1107 $error->msg = $msg; 1108 $response['error'] = $error; 1109 echo json_encode($response); 1110 ob_end_flush(); 1111 exit; 1112 } 1113 1114 /** 1115 * List the actions that correspond to a view of this module. 1116 * This is used by the participation report. 1117 * 1118 * Note: This is not used by new logging system. Event with 1119 * crud = 'r' and edulevel = LEVEL_PARTICIPATING will 1120 * be considered as view action. 1121 * 1122 * @return array 1123 */ 1124 function chat_get_view_actions() { 1125 return array('view', 'view all', 'report'); 1126 } 1127 1128 /** 1129 * List the actions that correspond to a post of this module. 1130 * This is used by the participation report. 1131 * 1132 * Note: This is not used by new logging system. Event with 1133 * crud = ('c' || 'u' || 'd') and edulevel = LEVEL_PARTICIPATING 1134 * will be considered as post action. 1135 * 1136 * @return array 1137 */ 1138 function chat_get_post_actions() { 1139 return array('talk'); 1140 } 1141 1142 /** 1143 * @deprecated since Moodle 3.3, when the block_course_overview block was removed. 1144 */ 1145 function chat_print_overview() { 1146 throw new coding_exception('chat_print_overview() can not be used any more and is obsolete.'); 1147 } 1148 1149 1150 /** 1151 * Implementation of the function for printing the form elements that control 1152 * whether the course reset functionality affects the chat. 1153 * 1154 * @param object $mform form passed by reference 1155 */ 1156 function chat_reset_course_form_definition(&$mform) { 1157 $mform->addElement('header', 'chatheader', get_string('modulenameplural', 'chat')); 1158 $mform->addElement('advcheckbox', 'reset_chat', get_string('removemessages', 'chat')); 1159 } 1160 1161 /** 1162 * Course reset form defaults. 1163 * 1164 * @param object $course 1165 * @return array 1166 */ 1167 function chat_reset_course_form_defaults($course) { 1168 return array('reset_chat' => 1); 1169 } 1170 1171 /** 1172 * Actual implementation of the reset course functionality, delete all the 1173 * chat messages for course $data->courseid. 1174 * 1175 * @global object 1176 * @global object 1177 * @param object $data the data submitted from the reset course. 1178 * @return array status array 1179 */ 1180 function chat_reset_userdata($data) { 1181 global $CFG, $DB; 1182 1183 $componentstr = get_string('modulenameplural', 'chat'); 1184 $status = array(); 1185 1186 if (!empty($data->reset_chat)) { 1187 $chatessql = "SELECT ch.id 1188 FROM {chat} ch 1189 WHERE ch.course=?"; 1190 $params = array($data->courseid); 1191 1192 $DB->delete_records_select('chat_messages', "chatid IN ($chatessql)", $params); 1193 $DB->delete_records_select('chat_messages_current', "chatid IN ($chatessql)", $params); 1194 $DB->delete_records_select('chat_users', "chatid IN ($chatessql)", $params); 1195 $status[] = array('component' => $componentstr, 'item' => get_string('removemessages', 'chat'), 'error' => false); 1196 } 1197 1198 // Updating dates - shift may be negative too. 1199 if ($data->timeshift) { 1200 // Any changes to the list of dates that needs to be rolled should be same during course restore and course reset. 1201 // See MDL-9367. 1202 shift_course_mod_dates('chat', array('chattime'), $data->timeshift, $data->courseid); 1203 $status[] = array('component' => $componentstr, 'item' => get_string('datechanged'), 'error' => false); 1204 } 1205 1206 return $status; 1207 } 1208 1209 /** 1210 * @param string $feature FEATURE_xx constant for requested feature 1211 * @return mixed True if module supports feature, null if doesn't know 1212 */ 1213 function chat_supports($feature) { 1214 switch($feature) { 1215 case FEATURE_GROUPS: 1216 return true; 1217 case FEATURE_GROUPINGS: 1218 return true; 1219 case FEATURE_MOD_INTRO: 1220 return true; 1221 case FEATURE_BACKUP_MOODLE2: 1222 return true; 1223 case FEATURE_COMPLETION_TRACKS_VIEWS: 1224 return true; 1225 case FEATURE_GRADE_HAS_GRADE: 1226 return false; 1227 case FEATURE_GRADE_OUTCOMES: 1228 return true; 1229 case FEATURE_SHOW_DESCRIPTION: 1230 return true; 1231 default: 1232 return null; 1233 } 1234 } 1235 1236 function chat_extend_navigation($navigation, $course, $module, $cm) { 1237 global $CFG; 1238 1239 $currentgroup = groups_get_activity_group($cm, true); 1240 1241 if (has_capability('mod/chat:chat', context_module::instance($cm->id))) { 1242 $strenterchat = get_string('enterchat', 'chat'); 1243 1244 $target = $CFG->wwwroot.'/mod/chat/'; 1245 $params = array('id' => $cm->instance); 1246 1247 if ($currentgroup) { 1248 $params['groupid'] = $currentgroup; 1249 } 1250 1251 $links = array(); 1252 1253 $url = new moodle_url($target.'gui_'.$CFG->chat_method.'/index.php', $params); 1254 $action = new popup_action('click', $url, 'chat'.$course->id.$cm->instance.$currentgroup, 1255 array('height' => 500, 'width' => 700)); 1256 $links[] = new action_link($url, $strenterchat, $action); 1257 1258 $url = new moodle_url($target.'gui_basic/index.php', $params); 1259 $action = new popup_action('click', $url, 'chat'.$course->id.$cm->instance.$currentgroup, 1260 array('height' => 500, 'width' => 700)); 1261 $links[] = new action_link($url, get_string('noframesjs', 'message'), $action); 1262 1263 foreach ($links as $link) { 1264 $navigation->add($link->text, $link, navigation_node::TYPE_SETTING, null , null, new pix_icon('i/group' , '')); 1265 } 1266 } 1267 1268 $chatusers = chat_get_users($cm->instance, $currentgroup, $cm->groupingid); 1269 if (is_array($chatusers) && count($chatusers) > 0) { 1270 $users = $navigation->add(get_string('currentusers', 'chat')); 1271 foreach ($chatusers as $chatuser) { 1272 $userlink = new moodle_url('/user/view.php', array('id' => $chatuser->id, 'course' => $course->id)); 1273 $users->add(fullname($chatuser).' '.format_time(time() - $chatuser->lastmessageping), 1274 $userlink, navigation_node::TYPE_USER, null, null, new pix_icon('i/user', '')); 1275 } 1276 } 1277 } 1278 1279 /** 1280 * Adds module specific settings to the settings block 1281 * 1282 * @param settings_navigation $settings The settings navigation object 1283 * @param navigation_node $chatnode The node to add module settings to 1284 */ 1285 function chat_extend_settings_navigation(settings_navigation $settings, navigation_node $chatnode) { 1286 global $DB, $PAGE, $USER; 1287 $chat = $DB->get_record("chat", array("id" => $PAGE->cm->instance)); 1288 1289 if ($chat->chattime && $chat->schedule) { 1290 $nextsessionnode = $chatnode->add(get_string('nextsession', 'chat'). 1291 ': '.userdate($chat->chattime). 1292 ' ('.usertimezone($USER->timezone).')'); 1293 $nextsessionnode->add_class('note'); 1294 } 1295 1296 $currentgroup = groups_get_activity_group($PAGE->cm, true); 1297 if ($currentgroup) { 1298 $groupselect = " AND groupid = '$currentgroup'"; 1299 } else { 1300 $groupselect = ''; 1301 } 1302 1303 if ($chat->studentlogs || has_capability('mod/chat:readlog', $PAGE->cm->context)) { 1304 if ($DB->get_records_select('chat_messages', "chatid = ? $groupselect", array($chat->id))) { 1305 $chatnode->add(get_string('viewreport', 'chat'), new moodle_url('/mod/chat/report.php', array('id' => $PAGE->cm->id))); 1306 } 1307 } 1308 } 1309 1310 /** 1311 * user logout event handler 1312 * 1313 * @param \core\event\user_loggedout $event The event. 1314 * @return void 1315 */ 1316 function chat_user_logout(\core\event\user_loggedout $event) { 1317 global $DB; 1318 $DB->delete_records('chat_users', array('userid' => $event->objectid)); 1319 } 1320 1321 /** 1322 * Return a list of page types 1323 * @param string $pagetype current page type 1324 * @param stdClass $parentcontext Block's parent context 1325 * @param stdClass $currentcontext Current context of block 1326 */ 1327 function chat_page_type_list($pagetype, $parentcontext, $currentcontext) { 1328 $modulepagetype = array('mod-chat-*' => get_string('page-mod-chat-x', 'chat')); 1329 return $modulepagetype; 1330 } 1331 1332 /** 1333 * Return a list of the latest messages in the given chat session. 1334 * 1335 * @param stdClass $chatuser chat user session data 1336 * @param int $chatlasttime last time messages were retrieved 1337 * @return array list of messages 1338 * @since Moodle 3.0 1339 */ 1340 function chat_get_latest_messages($chatuser, $chatlasttime) { 1341 global $DB; 1342 1343 $params = array('groupid' => $chatuser->groupid, 'chatid' => $chatuser->chatid, 'lasttime' => $chatlasttime); 1344 1345 $groupselect = $chatuser->groupid ? " AND (groupid=" . $chatuser->groupid . " OR groupid=0) " : ""; 1346 1347 return $DB->get_records_select('chat_messages_current', 'chatid = :chatid AND timestamp > :lasttime ' . $groupselect, 1348 $params, 'timestamp ASC'); 1349 } 1350 1351 /** 1352 * Mark the activity completed (if required) and trigger the course_module_viewed event. 1353 * 1354 * @param stdClass $chat chat object 1355 * @param stdClass $course course object 1356 * @param stdClass $cm course module object 1357 * @param stdClass $context context object 1358 * @since Moodle 3.0 1359 */ 1360 function chat_view($chat, $course, $cm, $context) { 1361 1362 // Trigger course_module_viewed event. 1363 $params = array( 1364 'context' => $context, 1365 'objectid' => $chat->id 1366 ); 1367 1368 $event = \mod_chat\event\course_module_viewed::create($params); 1369 $event->add_record_snapshot('course_modules', $cm); 1370 $event->add_record_snapshot('course', $course); 1371 $event->add_record_snapshot('chat', $chat); 1372 $event->trigger(); 1373 1374 // Completion. 1375 $completion = new completion_info($course); 1376 $completion->set_module_viewed($cm); 1377 } 1378 1379 /** 1380 * This function receives a calendar event and returns the action associated with it, or null if there is none. 1381 * 1382 * This is used by block_myoverview in order to display the event appropriately. If null is returned then the event 1383 * is not displayed on the block. 1384 * 1385 * @param calendar_event $event 1386 * @param \core_calendar\action_factory $factory 1387 * @param int $userid User id to use for all capability checks, etc. Set to 0 for current user (default). 1388 * @return \core_calendar\local\event\entities\action_interface|null 1389 */ 1390 function mod_chat_core_calendar_provide_event_action(calendar_event $event, 1391 \core_calendar\action_factory $factory, 1392 int $userid = 0) { 1393 global $USER, $DB; 1394 1395 if ($userid) { 1396 $user = core_user::get_user($userid, 'id, timezone'); 1397 } else { 1398 $user = $USER; 1399 } 1400 1401 $cm = get_fast_modinfo($event->courseid, $user->id)->instances['chat'][$event->instance]; 1402 1403 if (!$cm->uservisible) { 1404 // The module is not visible to the user for any reason. 1405 return null; 1406 } 1407 1408 $completion = new \completion_info($cm->get_course()); 1409 1410 $completiondata = $completion->get_data($cm, false, $userid); 1411 1412 if ($completiondata->completionstate != COMPLETION_INCOMPLETE) { 1413 return null; 1414 } 1415 1416 $chattime = $DB->get_field('chat', 'chattime', array('id' => $event->instance)); 1417 $usertimezone = core_date::get_user_timezone($user); 1418 $chattimemidnight = usergetmidnight($chattime, $usertimezone); 1419 $todaymidnight = usergetmidnight(time(), $usertimezone); 1420 1421 if ($chattime < $todaymidnight) { 1422 // The chat is before today. Do not show at all. 1423 return null; 1424 } else { 1425 // The chat is actionable if it is at some point today. 1426 $actionable = $chattimemidnight == $todaymidnight; 1427 1428 return $factory->create_instance( 1429 get_string('enterchat', 'chat'), 1430 new \moodle_url('/mod/chat/view.php', array('id' => $cm->id)), 1431 1, 1432 $actionable 1433 ); 1434 } 1435 } 1436 1437 /** 1438 * Given a set of messages for a chat, return the completed chat sessions (including optionally not completed ones). 1439 * 1440 * @param array $messages list of messages from a chat. It is assumed that these are sorted by timestamp in DESCENDING order. 1441 * @param bool $showall whether to include incomplete sessions or not 1442 * @return array the list of sessions 1443 * @since Moodle 3.5 1444 */ 1445 function chat_get_sessions($messages, $showall = false) { 1446 $sessions = []; 1447 $start = 0; 1448 $end = 0; 1449 $sessiontimes = []; 1450 1451 // Group messages by session times. 1452 foreach ($messages as $message) { 1453 // Initialise values start-end times if necessary. 1454 if (empty($start)) { 1455 $start = $message->timestamp; 1456 } 1457 if (empty($end)) { 1458 $end = $message->timestamp; 1459 } 1460 1461 // If this message's timestamp has been more than the gap, it means it's been idle. 1462 if ($start - $message->timestamp > CHAT_SESSION_GAP) { 1463 // Mark this as the session end of the next session. 1464 $end = $message->timestamp; 1465 } 1466 // Use this time as the session's start (until it gets overwritten on the next iteration, if needed). 1467 $start = $message->timestamp; 1468 1469 // Set this start-end pair in our list of session times. 1470 $sessiontimes[$end]['sessionstart'] = $start; 1471 if (!isset($sessiontimes[$end]['sessionend'])) { 1472 $sessiontimes[$end]['sessionend'] = $end; 1473 } 1474 if ($message->userid && !$message->issystem) { 1475 if (!isset($sessiontimes[$end]['sessionusers'][$message->userid])) { 1476 $sessiontimes[$end]['sessionusers'][$message->userid] = 1; 1477 } else { 1478 $sessiontimes[$end]['sessionusers'][$message->userid]++; 1479 } 1480 } 1481 } 1482 1483 // Go through each session time and prepare the session data to be returned. 1484 foreach ($sessiontimes as $sessionend => $sessiondata) { 1485 if (!isset($sessiondata['sessionusers'])) { 1486 $sessiondata['sessionusers'] = []; 1487 } 1488 $sessionusers = $sessiondata['sessionusers']; 1489 $sessionstart = $sessiondata['sessionstart']; 1490 1491 $iscomplete = $sessionend - $sessionstart > 60 && count($sessionusers) > 1; 1492 if ($showall || $iscomplete) { 1493 $sessions[] = (object) ($sessiondata + ['iscomplete' => $iscomplete]); 1494 } 1495 } 1496 1497 return $sessions; 1498 } 1499 1500 /** 1501 * Return the messages of the given chat session. 1502 * 1503 * @param int $chatid the chat id 1504 * @param mixed $group false if groups not used, int if groups used, 0 means all groups 1505 * @param int $start the session start timestamp (0 to not filter by time) 1506 * @param int $end the session end timestamp (0 to not filter by time) 1507 * @param string $sort an order to sort the results in (optional, a valid SQL ORDER BY parameter) 1508 * @return array session messages 1509 * @since Moodle 3.5 1510 */ 1511 function chat_get_session_messages($chatid, $group = false, $start = 0, $end = 0, $sort = '') { 1512 global $DB; 1513 1514 $params = array('chatid' => $chatid); 1515 1516 // If the user is allocated to a group, only show messages from people in the same group, or no group. 1517 if ($group) { 1518 $groupselect = " AND (groupid = :currentgroup OR groupid = 0)"; 1519 $params['currentgroup'] = $group; 1520 } else { 1521 $groupselect = ""; 1522 } 1523 1524 $select = "chatid = :chatid $groupselect"; 1525 if (!empty($start)) { 1526 $select .= ' AND timestamp >= :start'; 1527 $params['start'] = $start; 1528 } 1529 if (!empty($end)) { 1530 $select .= ' AND timestamp <= :end'; 1531 $params['end'] = $end; 1532 } 1533 1534 return $DB->get_records_select('chat_messages', $select, $params, $sort); 1535 }
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