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Developer Documentation
- Bug fixes for general core bugs in 4.2.x will end 22 April 2024 (12 months).
- Bug fixes for security issues in 4.2.x will end 7 October 2024 (18 months).
- PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.1.x is supported too.
/lib/ -> messagelib.php (source)
Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402]
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 * Functions for interacting with the message system 19 * 20 * @package core_message 21 * @copyright 2008 Luis Rodrigues and Martin Dougiamas 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 (__DIR__ . '/../message/lib.php'); 28 29 /** 30 * Called when a message provider wants to send a message. 31 * This functions checks the message recipient's message processor configuration then 32 * sends the message to the configured processors 33 * 34 * Required parameters of the $eventdata object: 35 * component string component name. must exist in message_providers 36 * name string message type name. must exist in message_providers 37 * userfrom object|int the user sending the message 38 * userto object|int the message recipient 39 * subject string the message subject 40 * fullmessage string the full message in a given format 41 * fullmessageformat int the format if the full message (FORMAT_MOODLE, FORMAT_HTML, ..) 42 * fullmessagehtml string the full version (the message processor will choose with one to use) 43 * smallmessage string the small version of the message 44 * 45 * Optional parameters of the $eventdata object: 46 * notification bool should the message be considered as a notification rather than a personal message 47 * contexturl string if this is a notification then you can specify a url to view the event. For example the forum post the user is being notified of. 48 * contexturlname string the display text for contexturl 49 * 50 * Note: processor failure will not reported as false return value in all scenarios, 51 * for example when it is called while a database transaction is open, 52 * earlier versions did not do it consistently either. 53 * 54 * @category message 55 * @param \core\message\message $eventdata information about the message (component, userfrom, userto, ...) 56 * @return mixed the integer ID of the new message or false if there was a problem (with submitted data or sending the message to the message processor) 57 */ 58 function message_send(\core\message\message $eventdata) { 59 global $CFG, $DB, $SITE; 60 61 //new message ID to return 62 $messageid = false; 63 64 // Fetch default (site) preferences 65 $defaultpreferences = get_message_output_default_preferences(); 66 $preferencebase = $eventdata->component.'_'.$eventdata->name; 67 68 // If the message provider is disabled via preferences, then don't send the message. 69 if (!empty($defaultpreferences->{$preferencebase.'_disable'})) { 70 return $messageid; 71 } 72 73 // By default a message is a notification. Only personal/private messages aren't notifications. 74 if (!isset($eventdata->notification)) { 75 $eventdata->notification = 1; 76 } 77 78 if (!is_object($eventdata->userfrom)) { 79 $eventdata->userfrom = core_user::get_user($eventdata->userfrom); 80 } 81 if (!$eventdata->userfrom) { 82 debugging('Attempt to send msg from unknown user', DEBUG_NORMAL); 83 return false; 84 } 85 86 // Legacy messages (FROM a single user TO a single user) must be converted into conversation messages. 87 // Then, these will be passed through the conversation messages code below. 88 if (!$eventdata->notification && !$eventdata->convid) { 89 // If messaging is disabled at the site level, then the 'instantmessage' provider is always disabled. 90 // Given this is the only 'message' type message provider, we can exit now if this is the case. 91 // Don't waste processing time trying to work out the other conversation member, if it's an individual 92 // conversation, just throw a generic debugging notice and return. 93 if (empty($CFG->messaging) || $eventdata->component !== 'moodle' || $eventdata->name !== 'instantmessage') { 94 debugging('Attempt to send msg from a provider '.$eventdata->component.'/'.$eventdata->name. 95 ' that is inactive or not allowed for the user id='.$eventdata->userto->id, DEBUG_NORMAL); 96 return false; 97 } 98 99 if (!is_object($eventdata->userto)) { 100 $eventdata->userto = core_user::get_user($eventdata->userto); 101 } 102 if (!$eventdata->userto) { 103 debugging('Attempt to send msg to unknown user', DEBUG_NORMAL); 104 return false; 105 } 106 107 // Verify all necessary data fields are present. 108 if (!isset($eventdata->userto->auth) or !isset($eventdata->userto->suspended) 109 or !isset($eventdata->userto->deleted) or !isset($eventdata->userto->emailstop)) { 110 111 debugging('Necessary properties missing in userto object, fetching full record', DEBUG_DEVELOPER); 112 $eventdata->userto = core_user::get_user($eventdata->userto->id); 113 } 114 115 $usertoisrealuser = (core_user::is_real_user($eventdata->userto->id) != false); 116 // If recipient is internal user (noreply user), and emailstop is set then don't send any msg. 117 if (!$usertoisrealuser && !empty($eventdata->userto->emailstop)) { 118 debugging('Attempt to send msg to internal (noreply) user', DEBUG_NORMAL); 119 return false; 120 } 121 122 if ($eventdata->userfrom->id == $eventdata->userto->id) { 123 // It's a self conversation. 124 $conversation = \core_message\api::get_self_conversation($eventdata->userfrom->id); 125 if (empty($conversation)) { 126 $conversation = \core_message\api::create_conversation( 127 \core_message\api::MESSAGE_CONVERSATION_TYPE_SELF, 128 [$eventdata->userfrom->id] 129 ); 130 } 131 } else { 132 if (!$conversationid = \core_message\api::get_conversation_between_users([$eventdata->userfrom->id, 133 $eventdata->userto->id])) { 134 // It's a private conversation between users. 135 $conversation = \core_message\api::create_conversation( 136 \core_message\api::MESSAGE_CONVERSATION_TYPE_INDIVIDUAL, 137 [ 138 $eventdata->userfrom->id, 139 $eventdata->userto->id 140 ] 141 ); 142 } 143 } 144 // We either have found a conversation, or created one. 145 $conversationid = !empty($conversationid) ? $conversationid : $conversation->id; 146 $eventdata->convid = $conversationid; 147 } 148 149 // This is a message directed to a conversation, not a specific user as was the way in legacy messaging. 150 // The above code has adapted the legacy messages into conversation messages. 151 // We must call send_message_to_conversation(), which handles per-member processor iteration and triggers 152 // a per-conversation event. 153 // All eventdata for messages should now have a convid, as we fixed this above. 154 if (!$eventdata->notification) { 155 156 // Only one message will be saved to the DB. 157 $conversationid = $eventdata->convid; 158 $table = 'messages'; 159 $tabledata = new stdClass(); 160 $tabledata->courseid = $eventdata->courseid; 161 $tabledata->useridfrom = $eventdata->userfrom->id; 162 $tabledata->conversationid = $conversationid; 163 $tabledata->subject = $eventdata->subject; 164 $tabledata->fullmessage = $eventdata->fullmessage; 165 $tabledata->fullmessageformat = $eventdata->fullmessageformat; 166 $tabledata->fullmessagehtml = $eventdata->fullmessagehtml; 167 $tabledata->smallmessage = $eventdata->smallmessage; 168 $tabledata->timecreated = time(); 169 $tabledata->customdata = $eventdata->customdata; 170 171 // The Trusted Content system. 172 // Texts created or uploaded by such users will be marked as trusted and will not be cleaned before display. 173 if (trusttext_active()) { 174 // Individual conversations are always in system context. 175 $messagecontext = \context_system::instance(); 176 // We need to know the type of conversation and the contextid if it is a group conversation. 177 if ($conv = $DB->get_record('message_conversations', ['id' => $conversationid], 'id, type, contextid')) { 178 if ($conv->type == \core_message\api::MESSAGE_CONVERSATION_TYPE_GROUP && $conv->contextid) { 179 $messagecontext = \context::instance_by_id($conv->contextid); 180 } 181 } 182 $tabledata->fullmessagetrust = trusttext_trusted($messagecontext); 183 } else { 184 $tabledata->fullmessagetrust = false; 185 } 186 187 if ($messageid = message_handle_phpunit_redirection($eventdata, $table, $tabledata)) { 188 return $messageid; 189 } 190 191 // Cache messages. 192 if (!empty($eventdata->convid)) { 193 // Cache the timecreated value of the last message in this conversation. 194 $cache = cache::make('core', 'message_time_last_message_between_users'); 195 $key = \core_message\helper::get_last_message_time_created_cache_key($eventdata->convid); 196 $cache->set($key, $tabledata->timecreated); 197 } 198 199 // Store unread message just in case we get a fatal error any time later. 200 $tabledata->id = $DB->insert_record($table, $tabledata); 201 $eventdata->savedmessageid = $tabledata->id; 202 203 return \core\message\manager::send_message_to_conversation($eventdata, $tabledata); 204 } 205 206 // Else the message is a notification. 207 if (!is_object($eventdata->userto)) { 208 $eventdata->userto = core_user::get_user($eventdata->userto); 209 } 210 if (!$eventdata->userto) { 211 debugging('Attempt to send msg to unknown user', DEBUG_NORMAL); 212 return false; 213 } 214 215 // If the provider's component is disabled or the user can't receive messages from it, don't send the message. 216 $isproviderallowed = false; 217 foreach (message_get_providers_for_user($eventdata->userto->id) as $provider) { 218 if ($provider->component === $eventdata->component && $provider->name === $eventdata->name) { 219 $isproviderallowed = true; 220 break; 221 } 222 } 223 if (!$isproviderallowed) { 224 debugging('Attempt to send msg from a provider '.$eventdata->component.'/'.$eventdata->name. 225 ' that is inactive or not allowed for the user id='.$eventdata->userto->id, DEBUG_NORMAL); 226 return false; 227 } 228 229 // Verify all necessary data fields are present. 230 if (!isset($eventdata->userto->auth) or !isset($eventdata->userto->suspended) 231 or !isset($eventdata->userto->deleted) or !isset($eventdata->userto->emailstop)) { 232 233 debugging('Necessary properties missing in userto object, fetching full record', DEBUG_DEVELOPER); 234 $eventdata->userto = core_user::get_user($eventdata->userto->id); 235 } 236 237 $usertoisrealuser = (core_user::is_real_user($eventdata->userto->id) != false); 238 // If recipient is internal user (noreply user), and emailstop is set then don't send any msg. 239 if (!$usertoisrealuser && !empty($eventdata->userto->emailstop)) { 240 debugging('Attempt to send msg to internal (noreply) user', DEBUG_NORMAL); 241 return false; 242 } 243 244 // Check if we are creating a notification or message. 245 $table = 'notifications'; 246 247 $tabledata = new stdClass(); 248 $tabledata->useridfrom = $eventdata->userfrom->id; 249 $tabledata->useridto = $eventdata->userto->id; 250 $tabledata->subject = $eventdata->subject; 251 $tabledata->fullmessage = $eventdata->fullmessage; 252 $tabledata->fullmessageformat = $eventdata->fullmessageformat; 253 $tabledata->fullmessagehtml = $eventdata->fullmessagehtml; 254 $tabledata->smallmessage = $eventdata->smallmessage; 255 $tabledata->eventtype = $eventdata->name; 256 $tabledata->component = $eventdata->component; 257 $tabledata->timecreated = time(); 258 $tabledata->customdata = $eventdata->customdata; 259 if (!empty($eventdata->contexturl)) { 260 $tabledata->contexturl = (string)$eventdata->contexturl; 261 } else { 262 $tabledata->contexturl = null; 263 } 264 265 if (!empty($eventdata->contexturlname)) { 266 $tabledata->contexturlname = (string)$eventdata->contexturlname; 267 } else { 268 $tabledata->contexturlname = null; 269 } 270 271 if ($messageid = message_handle_phpunit_redirection($eventdata, $table, $tabledata)) { 272 return $messageid; 273 } 274 275 // Fetch enabled processors. 276 $processors = get_message_processors(true); 277 278 // Preset variables 279 $processorlist = array(); 280 // Fill in the array of processors to be used based on default and user preferences 281 foreach ($processors as $processor) { 282 // Skip adding processors for internal user, if processor doesn't support sending message to internal user. 283 if (!$usertoisrealuser && !$processor->object->can_send_to_any_users()) { 284 continue; 285 } 286 287 // First find out permissions 288 $defaultlockedpreference = $processor->name . '_provider_' . $preferencebase . '_locked'; 289 $locked = false; 290 if (isset($defaultpreferences->{$defaultlockedpreference})) { 291 $locked = $defaultpreferences->{$defaultlockedpreference}; 292 } else { 293 // MDL-25114 They supplied an $eventdata->component $eventdata->name combination which doesn't 294 // exist in the message_provider table (thus there is no default settings for them). 295 $preferrormsg = "Could not load preference $defaultlockedpreference. Make sure the component and name you supplied 296 to message_send() are valid."; 297 throw new coding_exception($preferrormsg); 298 } 299 300 $preferencename = 'message_provider_'.$preferencebase.'_enabled'; 301 $forced = false; 302 if ($locked && isset($defaultpreferences->{$preferencename})) { 303 $userpreference = $defaultpreferences->{$preferencename}; 304 $forced = in_array($processor->name, explode(',', $userpreference)); 305 } 306 307 // Find out if user has configured this output 308 // Some processors cannot function without settings from the user 309 $userisconfigured = $processor->object->is_user_configured($eventdata->userto); 310 311 // DEBUG: notify if we are forcing unconfigured output 312 if ($forced && !$userisconfigured) { 313 debugging('Attempt to force message delivery to user who has "'.$processor->name.'" output unconfigured', DEBUG_NORMAL); 314 } 315 316 // Populate the list of processors we will be using 317 if ($forced && $userisconfigured) { 318 // An admin is forcing users to use this message processor. Use this processor unconditionally. 319 $processorlist[] = $processor->name; 320 } else if (!$forced && !$locked && $userisconfigured && !$eventdata->userto->emailstop) { 321 // User has not disabled notifications 322 // See if user set any notification preferences, otherwise use site default ones 323 if ($userpreference = get_user_preferences($preferencename, null, $eventdata->userto)) { 324 if (in_array($processor->name, explode(',', $userpreference))) { 325 $processorlist[] = $processor->name; 326 } 327 } else if (isset($defaultpreferences->{$preferencename})) { 328 if (in_array($processor->name, explode(',', $defaultpreferences->{$preferencename}))) { 329 $processorlist[] = $processor->name; 330 } 331 } 332 } 333 } 334 335 // Store unread message just in case we get a fatal error any time later. 336 $tabledata->id = $DB->insert_record($table, $tabledata); 337 $eventdata->savedmessageid = $tabledata->id; 338 339 // Let the manager do the sending or buffering when db transaction in progress. 340 try { 341 return \core\message\manager::send_message($eventdata, $tabledata, $processorlist); 342 } catch (\moodle_exception $exception) { 343 return false; 344 } 345 } 346 347 /** 348 * Helper method containing the PHPUnit specific code, used to redirect and capture messages/notifications. 349 * 350 * @param \core\message\message $eventdata the message object 351 * @param string $table the table to store the tabledata in, either messages or notifications. 352 * @param stdClass $tabledata the data to be stored when creating the message/notification. 353 * @return int the id of the stored message. 354 */ 355 function message_handle_phpunit_redirection(\core\message\message $eventdata, string $table, \stdClass $tabledata) { 356 global $DB; 357 if (PHPUNIT_TEST and class_exists('phpunit_util')) { 358 // Add some more tests to make sure the normal code can actually work. 359 $componentdir = core_component::get_component_directory($eventdata->component); 360 if (!$componentdir or !is_dir($componentdir)) { 361 throw new coding_exception('Invalid component specified in message-send(): '.$eventdata->component); 362 } 363 if (!file_exists("$componentdir/db/messages.php")) { 364 throw new coding_exception("$eventdata->component does not contain db/messages.php necessary for message_send()"); 365 } 366 $messageproviders = null; 367 include("$componentdir/db/messages.php"); 368 if (!isset($messageproviders[$eventdata->name])) { 369 throw new coding_exception("Missing messaging defaults for event '$eventdata->name' in '$eventdata->component' " . 370 "messages.php file"); 371 } 372 unset($componentdir); 373 unset($messageproviders); 374 // Now ask phpunit if it wants to catch this message. 375 if (phpunit_util::is_redirecting_messages()) { 376 $messageid = $DB->insert_record($table, $tabledata); 377 $message = $DB->get_record($table, array('id' => $messageid)); 378 379 if ($eventdata->notification) { 380 // Add the useridto attribute for BC. 381 $message->useridto = $eventdata->userto->id; 382 383 // Mark the notification as read. 384 \core_message\api::mark_notification_as_read($message); 385 } else { 386 // Add the useridto attribute for BC. 387 if (isset($eventdata->userto)) { 388 $message->useridto = $eventdata->userto->id; 389 } 390 // Mark the message as read for each of the other users. 391 $sql = "SELECT u.* 392 FROM {message_conversation_members} mcm 393 JOIN {user} u 394 ON (mcm.conversationid = :convid AND u.id = mcm.userid AND u.id != :userid)"; 395 $otherusers = $DB->get_records_sql($sql, ['convid' => $eventdata->convid, 'userid' => $eventdata->userfrom->id]); 396 foreach ($otherusers as $othermember) { 397 \core_message\api::mark_message_as_read($othermember->id, $message); 398 } 399 } 400 401 // Unit tests need this detail. 402 $message->notification = $eventdata->notification; 403 phpunit_util::message_sent($message); 404 return $messageid; 405 } 406 } 407 } 408 409 /** 410 * Updates the message_providers table with the current set of message providers 411 * 412 * @param string $component For example 'moodle', 'mod_forum' or 'block_activity_results' 413 * @return boolean True on success 414 */ 415 function message_update_providers($component='moodle') { 416 global $DB; 417 418 // load message providers from files 419 $fileproviders = message_get_providers_from_file($component); 420 421 // load message providers from the database 422 $dbproviders = message_get_providers_from_db($component); 423 424 foreach ($fileproviders as $messagename => $fileprovider) { 425 426 if (!empty($dbproviders[$messagename])) { // Already exists in the database 427 // check if capability has changed 428 if ($dbproviders[$messagename]->capability == $fileprovider['capability']) { // Same, so ignore 429 // exact same message provider already present in db, ignore this entry 430 unset($dbproviders[$messagename]); 431 continue; 432 433 } else { // Update existing one 434 $provider = new stdClass(); 435 $provider->id = $dbproviders[$messagename]->id; 436 $provider->capability = $fileprovider['capability']; 437 $DB->update_record('message_providers', $provider); 438 unset($dbproviders[$messagename]); 439 continue; 440 } 441 442 } else { // New message provider, add it 443 444 $provider = new stdClass(); 445 $provider->name = $messagename; 446 $provider->component = $component; 447 $provider->capability = $fileprovider['capability']; 448 449 $transaction = $DB->start_delegated_transaction(); 450 $DB->insert_record('message_providers', $provider); 451 message_set_default_message_preference($component, $messagename, $fileprovider); 452 $transaction->allow_commit(); 453 } 454 } 455 456 foreach ($dbproviders as $dbprovider) { // Delete old ones 457 $DB->delete_records('message_providers', array('id' => $dbprovider->id)); 458 $DB->delete_records_select('config_plugins', "plugin = 'message' AND ".$DB->sql_like('name', '?', false), array("%_provider_{$component}_{$dbprovider->name}_%")); 459 $DB->delete_records_select('user_preferences', $DB->sql_like('name', '?', false), array("message_provider_{$component}_{$dbprovider->name}_%")); 460 cache_helper::invalidate_by_definition('core', 'config', array(), 'message'); 461 } 462 463 return true; 464 } 465 466 /** 467 * This function populates default message preferences for all existing providers 468 * when the new message processor is added. 469 * 470 * @param string $processorname The name of message processor plugin (e.g. 'email', 'jabber') 471 * @throws invalid_parameter_exception if $processorname does not exist in the database 472 */ 473 function message_update_processors($processorname) { 474 global $DB; 475 476 // validate if our processor exists 477 $processor = $DB->get_records('message_processors', array('name' => $processorname)); 478 if (empty($processor)) { 479 throw new invalid_parameter_exception(); 480 } 481 482 $providers = $DB->get_records_sql('SELECT DISTINCT component FROM {message_providers}'); 483 484 $transaction = $DB->start_delegated_transaction(); 485 foreach ($providers as $provider) { 486 // load message providers from files 487 $fileproviders = message_get_providers_from_file($provider->component); 488 foreach ($fileproviders as $messagename => $fileprovider) { 489 message_set_default_message_preference($provider->component, $messagename, $fileprovider, $processorname); 490 } 491 } 492 $transaction->allow_commit(); 493 } 494 495 /** 496 * Setting default messaging preferences for particular message provider 497 * 498 * @param string $component The name of component (e.g. moodle, mod_forum, etc.) 499 * @param string $messagename The name of message provider 500 * @param array $fileprovider The value of $messagename key in the array defined in plugin messages.php 501 * @param string $processorname The optional name of message processor 502 */ 503 function message_set_default_message_preference($component, $messagename, $fileprovider, $processorname='') { 504 global $DB; 505 506 // Fetch message processors 507 $condition = null; 508 // If we need to process a particular processor, set the select condition 509 if (!empty($processorname)) { 510 $condition = array('name' => $processorname); 511 } 512 $processors = $DB->get_records('message_processors', $condition); 513 514 // load default messaging preferences 515 $defaultpreferences = get_message_output_default_preferences(); 516 517 // Setting default preference 518 $componentproviderbase = $component.'_'.$messagename; 519 $enabledpref = []; 520 // Set 'locked' preference first for each messaging processor. 521 foreach ($processors as $processor) { 522 $preferencename = $processor->name.'_provider_'.$componentproviderbase.'_locked'; 523 // If we do not have this setting yet, set it. 524 if (!isset($defaultpreferences->{$preferencename})) { 525 // Determine plugin default settings. 526 $plugindefault = 0; 527 if (isset($fileprovider['defaults'][$processor->name])) { 528 $plugindefault = $fileprovider['defaults'][$processor->name]; 529 } 530 // Get string values of the settings. 531 list($locked, $enabled) = translate_message_default_setting($plugindefault, $processor->name); 532 // Store default preferences for current processor. 533 set_config($preferencename, $locked, 'message'); 534 // Save enabled settings. 535 if ($enabled) { 536 $enabledpref[] = $processor->name; 537 } 538 } 539 } 540 // Now set enabled preferences. 541 if (!empty($enabledpref)) { 542 $preferencename = 'message_provider_'.$componentproviderbase.'_enabled'; 543 if (isset($defaultpreferences->{$preferencename})) { 544 // We have the default preferences for this message provider, which 545 // likely means that we have been adding a new processor. Add defaults 546 // to exisitng preferences. 547 $enabledpref = array_merge($enabledpref, explode(',', $defaultpreferences->{$preferencename})); 548 } 549 set_config($preferencename, join(',', $enabledpref), 'message'); 550 } 551 } 552 553 /** 554 * Returns the active providers for the user specified, based on capability 555 * 556 * @param int $userid id of user 557 * @return array An array of message providers 558 */ 559 function message_get_providers_for_user($userid) { 560 global $DB, $CFG; 561 562 $providers = get_message_providers(); 563 564 // Ensure user is not allowed to configure instantmessage if it is globally disabled. 565 if (!$CFG->messaging) { 566 foreach ($providers as $providerid => $provider) { 567 if ($provider->name == 'instantmessage') { 568 unset($providers[$providerid]); 569 break; 570 } 571 } 572 } 573 574 // If the component is an enrolment plugin, check it is enabled 575 foreach ($providers as $providerid => $provider) { 576 list($type, $name) = core_component::normalize_component($provider->component); 577 if ($type == 'enrol' && !enrol_is_enabled($name)) { 578 unset($providers[$providerid]); 579 } 580 } 581 582 // Now we need to check capabilities. We need to eliminate the providers 583 // where the user does not have the corresponding capability anywhere. 584 // Here we deal with the common simple case of the user having the 585 // capability in the system context. That handles $CFG->defaultuserroleid. 586 // For the remaining providers/capabilities, we need to do a more complex 587 // query involving all overrides everywhere. 588 $unsureproviders = array(); 589 $unsurecapabilities = array(); 590 $systemcontext = context_system::instance(); 591 foreach ($providers as $providerid => $provider) { 592 if (empty($provider->capability) || has_capability($provider->capability, $systemcontext, $userid)) { 593 // The provider is relevant to this user. 594 continue; 595 } 596 597 $unsureproviders[$providerid] = $provider; 598 $unsurecapabilities[$provider->capability] = 1; 599 unset($providers[$providerid]); 600 } 601 602 if (empty($unsureproviders)) { 603 // More complex checks are not required. 604 return $providers; 605 } 606 607 // Now check the unsure capabilities. 608 list($capcondition, $params) = $DB->get_in_or_equal( 609 array_keys($unsurecapabilities), SQL_PARAMS_NAMED); 610 $params['userid'] = $userid; 611 612 $sql = "SELECT DISTINCT rc.capability, 1 613 614 FROM {role_assignments} ra 615 JOIN {context} actx ON actx.id = ra.contextid 616 JOIN {role_capabilities} rc ON rc.roleid = ra.roleid 617 JOIN {context} cctx ON cctx.id = rc.contextid 618 619 WHERE ra.userid = :userid 620 AND rc.capability $capcondition 621 AND rc.permission > 0 622 AND (".$DB->sql_concat('actx.path', "'/'")." LIKE ".$DB->sql_concat('cctx.path', "'/%'"). 623 " OR ".$DB->sql_concat('cctx.path', "'/'")." LIKE ".$DB->sql_concat('actx.path', "'/%'").")"; 624 625 if (!empty($CFG->defaultfrontpageroleid)) { 626 $frontpagecontext = context_course::instance(SITEID); 627 628 list($capcondition2, $params2) = $DB->get_in_or_equal( 629 array_keys($unsurecapabilities), SQL_PARAMS_NAMED); 630 $params = array_merge($params, $params2); 631 $params['frontpageroleid'] = $CFG->defaultfrontpageroleid; 632 $params['frontpagepathpattern'] = $frontpagecontext->path . '/'; 633 634 $sql .= " 635 UNION 636 637 SELECT DISTINCT rc.capability, 1 638 639 FROM {role_capabilities} rc 640 JOIN {context} cctx ON cctx.id = rc.contextid 641 642 WHERE rc.roleid = :frontpageroleid 643 AND rc.capability $capcondition2 644 AND rc.permission > 0 645 AND ".$DB->sql_concat('cctx.path', "'/'")." LIKE :frontpagepathpattern"; 646 } 647 648 $relevantcapabilities = $DB->get_records_sql_menu($sql, $params); 649 650 // Add back any providers based on the detailed capability check. 651 foreach ($unsureproviders as $providerid => $provider) { 652 if (array_key_exists($provider->capability, $relevantcapabilities)) { 653 $providers[$providerid] = $provider; 654 } 655 } 656 657 return $providers; 658 } 659 660 /** 661 * Gets the message providers that are in the database for this component. 662 * 663 * This is an internal function used within messagelib.php 664 * 665 * @see message_update_providers() 666 * @param string $component A moodle component like 'moodle', 'mod_forum', 'block_activity_results' 667 * @return array An array of message providers 668 */ 669 function message_get_providers_from_db($component) { 670 global $DB; 671 672 return $DB->get_records('message_providers', array('component'=>$component), '', 'name, id, component, capability'); // Name is unique per component 673 } 674 675 /** 676 * Loads the messages definitions for a component from file 677 * 678 * If no messages are defined for the component, return an empty array. 679 * This is an internal function used within messagelib.php 680 * 681 * @see message_update_providers() 682 * @see message_update_processors() 683 * @param string $component A moodle component like 'moodle', 'mod_forum', 'block_activity_results' 684 * @return array An array of message providers or empty array if not exists 685 */ 686 function message_get_providers_from_file($component) { 687 $defpath = core_component::get_component_directory($component).'/db/messages.php'; 688 689 $messageproviders = array(); 690 691 if (file_exists($defpath)) { 692 require($defpath); 693 } 694 695 foreach ($messageproviders as $name => $messageprovider) { // Fix up missing values if required 696 if (empty($messageprovider['capability'])) { 697 $messageproviders[$name]['capability'] = NULL; 698 } 699 if (empty($messageprovider['defaults'])) { 700 $messageproviders[$name]['defaults'] = array(); 701 } 702 } 703 704 return $messageproviders; 705 } 706 707 /** 708 * Remove all message providers for particular component and corresponding settings 709 * 710 * @param string $component A moodle component like 'moodle', 'mod_forum', 'block_activity_results' 711 * @return void 712 */ 713 function message_provider_uninstall($component) { 714 global $DB; 715 716 $transaction = $DB->start_delegated_transaction(); 717 $DB->delete_records('message_providers', array('component' => $component)); 718 $DB->delete_records_select('config_plugins', "plugin = 'message' AND ".$DB->sql_like('name', '?', false), array("%_provider_{$component}_%")); 719 $DB->delete_records_select('user_preferences', $DB->sql_like('name', '?', false), array("message_provider_{$component}_%")); 720 $transaction->allow_commit(); 721 // Purge all messaging settings from the caches. They are stored by plugin so we have to clear all message settings. 722 cache_helper::invalidate_by_definition('core', 'config', array(), 'message'); 723 } 724 725 /** 726 * Uninstall a message processor 727 * 728 * @param string $name A message processor name like 'email', 'jabber' 729 */ 730 function message_processor_uninstall($name) { 731 global $DB; 732 733 $transaction = $DB->start_delegated_transaction(); 734 $DB->delete_records('message_processors', array('name' => $name)); 735 $DB->delete_records_select('config_plugins', "plugin = ?", array("message_{$name}")); 736 // Delete permission preferences only, we do not care about enabled defaults, 737 // they will be removed on the next attempt to update the preferences. 738 $DB->delete_records_select('config_plugins', "plugin = 'message' AND ".$DB->sql_like('name', '?', false), array("{$name}_provider_%")); 739 $transaction->allow_commit(); 740 // Purge all messaging settings from the caches. They are stored by plugin so we have to clear all message settings. 741 cache_helper::invalidate_by_definition('core', 'config', array(), array('message', "message_{$name}")); 742 }
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