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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.
/mod/assign/ -> assignmentplugin.php (source)
Differences Between: [Versions 402 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 * This file contains the functions for assign_plugin abstract class 19 * 20 * 21 * @package mod_assign 22 * @copyright 2012 NetSpot {@link http://www.netspot.com.au} 23 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 24 */ 25 26 defined('MOODLE_INTERNAL') || die(); 27 28 /** 29 * Abstract class for assign_plugin (submission/feedback). 30 * 31 * @package mod_assign 32 * @copyright 2012 NetSpot {@link http://www.netspot.com.au} 33 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 34 */ 35 abstract class assign_plugin { 36 37 /** @var assign $assignment the assignment record that contains the global 38 * settings for this assign instance 39 */ 40 protected $assignment; 41 /** @var string $type assignment plugin type */ 42 private $type = ''; 43 /** @var string $error error message */ 44 private $error = ''; 45 /** @var boolean|null $enabledcache Cached lookup of the is_enabled function */ 46 private $enabledcache = null; 47 /** @var boolean|null $enabledcache Cached lookup of the is_visible function */ 48 private $visiblecache = null; 49 50 /** 51 * Constructor for the abstract plugin type class 52 * 53 * @param assign $assignment 54 * @param string $type 55 */ 56 public final function __construct(assign $assignment, $type) { 57 $this->assignment = $assignment; 58 $this->type = $type; 59 } 60 61 /** 62 * Is this the first plugin in the list? 63 * 64 * @return bool 65 */ 66 public final function is_first() { 67 $order = get_config($this->get_subtype() . '_' . $this->get_type(), 'sortorder'); 68 69 if ($order == 0) { 70 return true; 71 } 72 return false; 73 } 74 75 /** 76 * Is this the last plugin in the list? 77 * 78 * @return bool 79 */ 80 public final function is_last() { 81 $lastindex = count(core_component::get_plugin_list($this->get_subtype()))-1; 82 $currentindex = get_config($this->get_subtype() . '_' . $this->get_type(), 'sortorder'); 83 if ($lastindex == $currentindex) { 84 return true; 85 } 86 87 return false; 88 } 89 90 /** 91 * This function should be overridden to provide an array of elements that can be added to a moodle 92 * form for display in the settings page for the assignment. 93 * @param MoodleQuickForm $mform The form to add the elements to 94 * @return $array 95 */ 96 public function get_settings(MoodleQuickForm $mform) { 97 return; 98 } 99 100 /** 101 * Allows the plugin to update the defaultvalues passed in to 102 * the settings form (needed to set up draft areas for editor 103 * and filemanager elements) 104 * @param array $defaultvalues 105 */ 106 public function data_preprocessing(&$defaultvalues) { 107 return; 108 } 109 110 /** 111 * The assignment subtype is responsible for saving it's own settings as the database table for the 112 * standard type cannot be modified. 113 * 114 * @param stdClass $formdata - the data submitted from the form 115 * @return bool - on error the subtype should call set_error and return false. 116 */ 117 public function save_settings(stdClass $formdata) { 118 return true; 119 } 120 121 /** 122 * Save the error message from the last error 123 * 124 * @param string $msg - the error description 125 */ 126 protected final function set_error($msg) { 127 $this->error = $msg; 128 } 129 130 /** 131 * What was the last error? 132 * 133 * @return string 134 */ 135 public final function get_error() { 136 return $this->error; 137 } 138 139 /** 140 * Should return the name of this plugin type. 141 * 142 * @return string - the name 143 */ 144 public abstract function get_name(); 145 146 /** 147 * Should return the subtype of this plugin. 148 * 149 * @return string - either 'assignsubmission' or 'feedback' 150 */ 151 public abstract function get_subtype(); 152 153 /** 154 * Should return the type of this plugin. 155 * 156 * @return string - the type 157 */ 158 public final function get_type() { 159 return $this->type; 160 } 161 162 /** 163 * Get the installed version of this plugin 164 * 165 * @return string 166 */ 167 public final function get_version() { 168 $version = get_config($this->get_subtype() . '_' . $this->get_type(), 'version'); 169 if ($version) { 170 return $version; 171 } else { 172 return ''; 173 } 174 } 175 176 /** 177 * Get the required moodle version for this plugin 178 * 179 * @return string 180 */ 181 public final function get_requires() { 182 $requires = get_config($this->get_subtype() . '_' . $this->get_type(), 'requires'); 183 if ($requires) { 184 return $requires; 185 } else { 186 return ''; 187 } 188 } 189 190 /** 191 * Save any custom data for this form submission 192 * 193 * @param stdClass $submissionorgrade - assign_submission or assign_grade. 194 * For submission plugins this is the submission data, 195 * for feedback plugins it is the grade data 196 * @param stdClass $data - the data submitted from the form 197 * @return bool - on error the subtype should call set_error and return false. 198 */ 199 public function save(stdClass $submissionorgrade, stdClass $data) { 200 return true; 201 } 202 203 /** 204 * Set this plugin to enabled 205 * 206 * @return bool 207 */ 208 public final function enable() { 209 $this->enabledcache = true; 210 return $this->set_config('enabled', 1); 211 } 212 213 /** 214 * Set this plugin to disabled 215 * 216 * @return bool 217 */ 218 public final function disable() { 219 $this->enabledcache = false; 220 return $this->set_config('enabled', 0); 221 } 222 223 /** 224 * Allows hiding this plugin from the submission/feedback screen if it is not enabled. 225 * 226 * @return bool - if false - this plugin will not accept submissions / feedback 227 */ 228 public function is_enabled() { 229 if ($this->enabledcache === null) { 230 $this->enabledcache = $this->get_config('enabled'); 231 } 232 return $this->enabledcache; 233 } 234 235 236 /** 237 * Get any additional fields for the submission/grading form for this assignment. 238 * 239 * @param mixed $submissionorgrade submission|grade - For submission plugins this is the submission data, 240 * for feedback plugins it is the grade data 241 * @param MoodleQuickForm $mform - This is the form 242 * @param stdClass $data - This is the form data that can be modified for example by a filemanager element 243 * @param int $userid - This is the userid for the current submission. 244 * This is passed separately as there may not yet be a submission or grade. 245 * @return boolean - true if we added anything to the form 246 */ 247 public function get_form_elements_for_user($submissionorgrade, MoodleQuickForm $mform, stdClass $data, $userid) { 248 return $this->get_form_elements($submissionorgrade, $mform, $data); 249 } 250 251 /** 252 * Get any additional fields for the submission/grading form for this assignment. 253 * This function is retained for backwards compatibility - new plugins should override {@link get_form_elements_for_user()}. 254 * 255 * @param mixed $submissionorgrade submission|grade - For submission plugins this is the submission data, 256 * for feedback plugins it is the grade data 257 * @param MoodleQuickForm $mform - This is the form 258 * @param stdClass $data - This is the form data that can be modified for example by a filemanager element 259 * @return boolean - true if we added anything to the form 260 */ 261 public function get_form_elements($submissionorgrade, MoodleQuickForm $mform, stdClass $data) { 262 return false; 263 } 264 265 /** 266 * Should not output anything - return the result as a string so it can be consumed by webservices. 267 * 268 * @param stdClass $submissionorgrade assign_submission or assign_grade 269 * For submission plugins this is the submission data, 270 * for feedback plugins it is the grade data 271 * @return string - return a string representation of the submission in full 272 */ 273 public function view(stdClass $submissionorgrade) { 274 return ''; 275 } 276 277 /** 278 * Get the numerical sort order for this plugin 279 * 280 * @return int 281 */ 282 public final function get_sort_order() { 283 $order = get_config($this->get_subtype() . '_' . $this->get_type(), 'sortorder'); 284 return $order?$order:0; 285 } 286 287 /** 288 * Is this plugin enaled? 289 * 290 * @return bool 291 */ 292 public final function is_visible() { 293 if ($this->visiblecache === null) { 294 $disabled = get_config($this->get_subtype() . '_' . $this->get_type(), 'disabled'); 295 $this->visiblecache = !$disabled; 296 } 297 return $this->visiblecache; 298 } 299 300 301 /** 302 * Has this plugin got a custom settings.php file? 303 * 304 * @return bool 305 */ 306 public final function has_admin_settings() { 307 global $CFG; 308 309 $pluginroot = $CFG->dirroot . '/mod/assign/' . substr($this->get_subtype(), strlen('assign')) . '/' . $this->get_type(); 310 $settingsfile = $pluginroot . '/settings.php'; 311 return file_exists($settingsfile); 312 } 313 314 /** 315 * Set a configuration value for this plugin 316 * 317 * @param string $name The config key 318 * @param string $value The config value 319 * @return bool 320 */ 321 public final function set_config($name, $value) { 322 global $DB; 323 324 $dbparams = array('assignment'=>$this->assignment->get_instance()->id, 325 'subtype'=>$this->get_subtype(), 326 'plugin'=>$this->get_type(), 327 'name'=>$name); 328 $current = $DB->get_record('assign_plugin_config', $dbparams, '*', IGNORE_MISSING); 329 330 if ($current) { 331 $current->value = $value; 332 return $DB->update_record('assign_plugin_config', $current); 333 } else { 334 $setting = new stdClass(); 335 $setting->assignment = $this->assignment->get_instance()->id; 336 $setting->subtype = $this->get_subtype(); 337 $setting->plugin = $this->get_type(); 338 $setting->name = $name; 339 $setting->value = $value; 340 341 return $DB->insert_record('assign_plugin_config', $setting) > 0; 342 } 343 } 344 345 /** 346 * Get a configuration value for this plugin 347 * 348 * @param mixed $setting The config key (string) or null 349 * @return mixed string | false 350 */ 351 public final function get_config($setting = null) { 352 global $DB; 353 354 if ($setting) { 355 if (!$this->assignment->has_instance()) { 356 return false; 357 } 358 $assignment = $this->assignment->get_instance(); 359 if ($assignment) { 360 $dbparams = array('assignment'=>$assignment->id, 361 'subtype'=>$this->get_subtype(), 362 'plugin'=>$this->get_type(), 363 'name'=>$setting); 364 $result = $DB->get_record('assign_plugin_config', $dbparams, '*', IGNORE_MISSING); 365 if ($result) { 366 return $result->value; 367 } 368 } 369 return false; 370 } 371 $dbparams = array('assignment'=>$this->assignment->get_instance()->id, 372 'subtype'=>$this->get_subtype(), 373 'plugin'=>$this->get_type()); 374 $results = $DB->get_records('assign_plugin_config', $dbparams); 375 376 $config = new stdClass(); 377 if (is_array($results)) { 378 foreach ($results as $setting) { 379 $name = $setting->name; 380 $config->$name = $setting->value; 381 } 382 } 383 return $config; 384 } 385 386 /** 387 * Get a list of file areas associated with the plugin configuration. 388 * This is used for backup/restore. 389 * 390 * @return array names of the fileareas, can be an empty array 391 */ 392 public function get_config_file_areas() { 393 return array(); 394 } 395 396 /** 397 * Should not output anything - return the result as a string so it can be consumed by webservices. 398 * 399 * @param stdClass $submissionorgrade assign_submission or assign_grade 400 * For submission plugins this is the submission data, for feedback plugins it is the grade data 401 * @param bool $showviewlink Modifed to return whether or not to show a link to the full submission/feedback 402 * @return string - return a string representation of the submission in full 403 */ 404 public function view_summary(stdClass $submissionorgrade, & $showviewlink) { 405 return ''; 406 } 407 408 /** 409 * Given a field name and value should update the text for this field in the plugins submission or grade 410 * 411 * @param string $name Name of the field. 412 * @param string $value Updated text 413 * @param int $submissionorgradeid The id of the submission or grade 414 * @return bool - true if the value was updated 415 */ 416 public function set_editor_text($name, $value, $submissionorgradeid) { 417 return false; 418 } 419 420 /** 421 * Given a field name and value should update the format for this field in the plugins submission or grade 422 * 423 * @param string $name Name of the field. 424 * @param int $format Updated format. 425 * @param int $submissionorgradeid The id of the submission or grade. 426 * @return bool - true if the value was updated 427 */ 428 public function set_editor_format($name, $format, $submissionorgradeid) { 429 return false; 430 } 431 432 /** 433 * Return a list of the fields that can be exported or imported via text. 434 * 435 * @return array - The list of field names (strings) and descriptions. ($name => $description) 436 */ 437 public function get_editor_fields() { 438 return array(); 439 } 440 441 /** 442 * Given a field name, should return the text of an editor field that is part of 443 * this plugin. This is used when exporting to portfolio. 444 * 445 * @param string $name Name of the field. 446 * @param int $submissionorgradeid The id of the submission or grade 447 * @return string - The text for the editor field 448 */ 449 public function get_editor_text($name, $submissionorgradeid) { 450 return ''; 451 } 452 453 /** 454 * Produce a list of files suitable for export that represent this feedback or submission 455 * 456 * @param stdClass $submissionorgrade assign_submission or assign_grade 457 * For submission plugins this is the submission data, for feedback plugins it is the grade data 458 * @param stdClass $user The user record for the current submission. 459 * Needed for url rewriting if this is a group submission. 460 * @return array - return an array of files indexed by filename 461 */ 462 public function get_files(stdClass $submissionorgrade, stdClass $user) { 463 return array(); 464 } 465 466 /** 467 * Given a field name, should return the format of an editor field that is part of 468 * this plugin. This is used when exporting to portfolio. 469 * 470 * @param string $name Name of the field. 471 * @param int $submissionid The id of the submission 472 * @return int - The format for the editor field 473 */ 474 public function get_editor_format($name, $submissionid) { 475 return 0; 476 } 477 478 /** 479 * Return true if this plugin can upgrade an old Moodle 2.2 assignment of this type 480 * and version. 481 * 482 * @param string $type The old assignment subtype 483 * @param int $version The old assignment version 484 * @return bool True if upgrade is possible 485 */ 486 public function can_upgrade($type, $version) { 487 return false; 488 } 489 490 /** 491 * Upgrade the settings from the old assignment to the new one 492 * 493 * @param context $oldcontext The context for the old assignment module 494 * @param stdClass $oldassignment The data record for the old assignment 495 * @param string $log Record upgrade messages in the log 496 * @return bool true or false - false will trigger a rollback 497 */ 498 public function upgrade_settings(context $oldcontext, stdClass $oldassignment, & $log) { 499 $params = array('type'=>$this->type, 'subtype'=>$this->get_subtype()); 500 $log .= ' ' . get_string('upgradenotimplemented', 'mod_assign', $params); 501 return false; 502 } 503 504 /** 505 * Upgrade the submission from the old assignment to the new one 506 * 507 * @param context $oldcontext The data record for the old context 508 * @param stdClass $oldassignment The data record for the old assignment 509 * @param stdClass $oldsubmissionorgrade The data record for the old submission 510 * @param stdClass $submissionorgrade assign_submission or assign_grade The new submission or grade 511 * @param string $log Record upgrade messages in the log 512 * @return boolean true or false - false will trigger a rollback 513 */ 514 public function upgrade(context $oldcontext, 515 stdClass $oldassignment, 516 stdClass $oldsubmissionorgrade, 517 stdClass $submissionorgrade, 518 & $log) { 519 $params = array('type'=>$this->type, 'subtype'=>$this->get_subtype()); 520 $log = $log . ' ' . get_string('upgradenotimplemented', 'mod_assign', $params); 521 return false; 522 } 523 524 /** 525 * Formatting for log info 526 * 527 * @param stdClass $submissionorgrade assign_submission or assign_grade The new submission or grade 528 * @return string 529 */ 530 public function format_for_log(stdClass $submissionorgrade) { 531 // Format the info for each submission plugin add_to_log. 532 return ''; 533 } 534 535 /** 536 * The assignment has been deleted - remove the plugin specific data 537 * 538 * @return bool 539 */ 540 public function delete_instance() { 541 return true; 542 } 543 544 /** 545 * Run cron for this plugin 546 */ 547 public static function cron() { 548 } 549 550 /** 551 * Is this assignment plugin empty? (ie no submission or feedback) 552 * @param stdClass $submissionorgrade assign_submission or assign_grade 553 * @return bool 554 */ 555 public function is_empty(stdClass $submissionorgrade) { 556 return true; 557 } 558 559 /** 560 * Get file areas returns a list of areas this plugin stores files 561 * @return array - An array of fileareas (keys) and descriptions (values) 562 */ 563 public function get_file_areas() { 564 return array(); 565 } 566 567 568 /** 569 * Default implementation of file_get_info for plugins. 570 * This is used by the filebrowser to browse a plugins file areas. 571 * 572 * This implementation should work for most plugins but can be overridden if required. 573 * @param file_browser $browser 574 * @param string $filearea 575 * @param int $itemid 576 * @param string $filepath 577 * @param string $filename 578 * @return file_info_stored 579 */ 580 public function get_file_info($browser, $filearea, $itemid, $filepath, $filename) { 581 global $CFG, $DB, $USER; 582 $urlbase = $CFG->wwwroot.'/pluginfile.php'; 583 $writeaccess = false; 584 // Permission check on the itemid. 585 $assignment = $this->assignment; 586 587 if ($this->get_subtype() == 'assignsubmission') { 588 if ($itemid) { 589 $record = $DB->get_record('assign_submission', array('id' => $itemid), 'userid,groupid', IGNORE_MISSING); 590 if (!$record) { 591 return null; 592 } 593 if (!empty($record->userid)) { 594 if (!$assignment->can_view_submission($record->userid)) { 595 return null; 596 } 597 598 // We only report write access for teachers. 599 $writeaccess = $assignment->can_grade() && $assignment->can_edit_submission($record->userid); 600 } else { 601 // Must be a team submission with a group. 602 if (!$assignment->can_view_group_submission($record->groupid)) { 603 return null; 604 } 605 // We only report write access for teachers. 606 $writeaccess = $assignment->can_grade() && $assignment->can_edit_group_submission($record->groupid); 607 } 608 } 609 } else { 610 // Not supported for feedback plugins. 611 return null; 612 } 613 614 $fs = get_file_storage(); 615 $filepath = is_null($filepath) ? '/' : $filepath; 616 $filename = is_null($filename) ? '.' : $filename; 617 if (!($storedfile = $fs->get_file($assignment->get_context()->id, 618 $this->get_subtype() . '_' . $this->get_type(), 619 $filearea, 620 $itemid, 621 $filepath, 622 $filename))) { 623 return null; 624 } 625 626 return new file_info_stored($browser, 627 $assignment->get_context(), 628 $storedfile, 629 $urlbase, 630 $filearea, 631 $itemid, 632 true, 633 $writeaccess, 634 false); 635 } 636 637 /** 638 * This allows a plugin to render a page in the context of the assignment 639 * 640 * If the plugin creates a link to the assignment view.php page with 641 * The following required parameters: 642 * id=coursemoduleid 643 * plugin=type 644 * pluginsubtype=assignfeedback|assignsubmission 645 * pluginaction=customaction 646 * 647 * Then this function will be called to display the page with the pluginaction passed as action 648 * @param string $action The plugin specified action 649 * @return string 650 */ 651 public function view_page($action) { 652 return ''; 653 } 654 655 /** 656 * This allows a plugin to render an introductory section which is displayed 657 * right below the activity's "intro" section on the main assignment page. 658 * 659 * @return string 660 */ 661 public function view_header() { 662 return ''; 663 } 664 665 /** 666 * If this plugin should not include a column in the grading table or a row on the summary page 667 * then return false 668 * 669 * @return bool 670 */ 671 public function has_user_summary() { 672 return true; 673 } 674 675 /** 676 * If this plugin can participate in a webservice (save_submission or save_grade), 677 * return a list of external_params to be included in the definition of that webservice. 678 * 679 * @return external_description|null 680 */ 681 public function get_external_parameters() { 682 return null; 683 } 684 685 /** 686 * If true, the plugin will appear on the module settings page and can be 687 * enabled/disabled per assignment instance. 688 * 689 * @return bool 690 */ 691 public function is_configurable() { 692 return true; 693 } 694 695 /** 696 * Return the plugin configs for external functions, 697 * in some cases the configs will need formatting or be returned only if the current user has some capabilities enabled. 698 * 699 * @return array the list of settings 700 * @since Moodle 3.2 701 */ 702 public function get_config_for_external() { 703 return array(); 704 } 705 }
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