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282 lines
11 KiB
282 lines
11 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Base form for changing completion rules
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*
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* @package core_completion
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* @copyright 2017 Marina Glancy
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die;
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require_once($CFG->libdir.'/formslib.php');
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require_once($CFG->libdir.'/completionlib.php');
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require_once($CFG->dirroot.'/course/modlib.php');
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/**
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* Base form for changing completion rules. Used in bulk editing activity completion and editing default activity completion
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*
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* @package core_completion
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* @copyright 2017 Marina Glancy
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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abstract class core_completion_edit_base_form extends moodleform {
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/** @var moodleform_mod Do not use directly, call $this->get_module_form() */
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protected $_moduleform = null;
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/** @var bool */
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protected $hascustomrules = false;
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/** @var stdClass */
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protected $course;
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/**
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* Returns list of types of selected module types
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*
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* @return array modname=>modfullname
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*/
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abstract protected function get_module_names();
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/**
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* Returns true if all selected modules support tracking view.
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*
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* @return bool
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*/
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protected function support_views() {
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foreach ($this->get_module_names() as $modname => $modfullname) {
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if (!plugin_supports('mod', $modname, FEATURE_COMPLETION_TRACKS_VIEWS, false)) {
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return false;
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}
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}
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return true;
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}
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/**
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* Returns true if all selected modules support grading.
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*
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* @return bool
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*/
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protected function support_grades() {
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foreach ($this->get_module_names() as $modname => $modfullname) {
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if (!plugin_supports('mod', $modname, FEATURE_GRADE_HAS_GRADE, false)) {
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return false;
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}
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}
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return true;
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}
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/**
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* Returns an instance of component-specific module form for the first selected module
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*
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* @return moodleform_mod|null
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*/
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abstract protected function get_module_form();
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/**
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* If all selected modules are of the same module type, adds custom completion rules from this module type
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*
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* @return array
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*/
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protected function add_custom_completion_rules() {
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$modnames = array_keys($this->get_module_names());
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if (count($modnames) != 1 || !plugin_supports('mod', $modnames[0], FEATURE_COMPLETION_HAS_RULES, false)) {
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return [];
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}
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try {
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// Add completion rules from the module form to this form.
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$moduleform = $this->get_module_form();
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$moduleform->_form = $this->_form;
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if ($customcompletionelements = $moduleform->add_completion_rules()) {
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$this->hascustomrules = true;
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}
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return $customcompletionelements;
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} catch (Exception $e) {
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debugging('Could not add custom completion rule of module ' . $modnames[0] .
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' to this form, this has to be fixed by the developer', DEBUG_DEVELOPER);
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return [];
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}
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}
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/**
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* Checks if at least one of the custom completion rules is enabled
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*
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* @param array $data Input data (not yet validated)
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* @return bool True if one or more rules is enabled, false if none are;
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* default returns false
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*/
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protected function completion_rule_enabled($data) {
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if ($this->hascustomrules) {
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return $this->get_module_form()->completion_rule_enabled($data);
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}
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return false;
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}
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/**
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* Returns list of modules that have automatic completion rules that are not shown on this form
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* (because they are not present in at least one other selected module).
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*
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* @return array
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*/
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protected function get_modules_with_hidden_rules() {
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$modnames = $this->get_module_names();
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if (count($modnames) <= 1) {
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// No rules definitions conflicts if there is only one module type.
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return [];
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}
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$conflicts = [];
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if (!$this->support_views()) {
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// If we don't display views rule but at least one module supports it - we have conflicts.
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foreach ($modnames as $modname => $modfullname) {
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if (empty($conflicts[$modname]) && plugin_supports('mod', $modname, FEATURE_COMPLETION_TRACKS_VIEWS, false)) {
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$conflicts[$modname] = $modfullname;
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}
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}
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}
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if (!$this->support_grades()) {
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// If we don't display grade rule but at least one module supports it - we have conflicts.
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foreach ($modnames as $modname => $modfullname) {
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if (empty($conflicts[$modname]) && plugin_supports('mod', $modname, FEATURE_GRADE_HAS_GRADE, false)) {
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$conflicts[$modname] = $modfullname;
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}
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}
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}
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foreach ($modnames as $modname => $modfullname) {
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// We do not display any custom completion rules, find modules that define them and add to conflicts list.
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if (empty($conflicts[$modname]) && plugin_supports('mod', $modname, FEATURE_COMPLETION_HAS_RULES, false)) {
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$conflicts[$modname] = $modfullname;
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}
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}
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return $conflicts;
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}
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/**
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* Form definition
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*/
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public function definition() {
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$mform = $this->_form;
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// Course id.
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$mform->addElement('hidden', 'id', $this->course->id);
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$mform->setType('id', PARAM_INT);
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// Unlock completion automatically (this element can be used in validation).
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$mform->addElement('hidden', 'completionunlocked', 1);
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$mform->setType('completionunlocked', PARAM_INT);
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$mform->addElement('select', 'completion', get_string('completion', 'completion'),
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array(COMPLETION_TRACKING_NONE => get_string('completion_none', 'completion'),
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COMPLETION_TRACKING_MANUAL => get_string('completion_manual', 'completion')));
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$mform->addHelpButton('completion', 'completion', 'completion');
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$mform->setDefault('completion', COMPLETION_TRACKING_NONE);
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// Automatic completion once you view it.
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$autocompletionpossible = false;
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if ($this->support_views()) {
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$mform->addElement('advcheckbox', 'completionview', get_string('completionview', 'completion'),
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get_string('completionview_desc', 'completion'));
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$mform->disabledIf('completionview', 'completion', 'ne', COMPLETION_TRACKING_AUTOMATIC);
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$autocompletionpossible = true;
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}
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// Automatic completion once it's graded.
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if ($this->support_grades()) {
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$mform->addElement('advcheckbox', 'completionusegrade', get_string('completionusegrade', 'completion'),
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get_string('completionusegrade_desc', 'completion'));
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$mform->disabledIf('completionusegrade', 'completion', 'ne', COMPLETION_TRACKING_AUTOMATIC);
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$mform->addHelpButton('completionusegrade', 'completionusegrade', 'completion');
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$autocompletionpossible = true;
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}
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// Automatic completion according to module-specific rules.
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foreach ($this->add_custom_completion_rules() as $element) {
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$mform->disabledIf($element, 'completion', 'ne', COMPLETION_TRACKING_AUTOMATIC);
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$autocompletionpossible = true;
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}
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// Automatic option only appears if possible.
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if ($autocompletionpossible) {
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$mform->getElement('completion')->addOption(
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get_string('completion_automatic', 'completion'),
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COMPLETION_TRACKING_AUTOMATIC);
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}
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// Completion expected at particular date? (For progress tracking).
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$mform->addElement('date_time_selector', 'completionexpected',
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get_string('completionexpected', 'completion'), ['optional' => true]);
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$mform->addHelpButton('completionexpected', 'completionexpected', 'completion');
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$mform->disabledIf('completionexpected', 'completion', 'eq', COMPLETION_TRACKING_NONE);
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if ($conflicts = $this->get_modules_with_hidden_rules()) {
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$mform->addElement('static', 'qwerty', '', get_string('hiddenrules', 'completion', join(', ', $conflicts)));
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}
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$this->add_action_buttons();
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}
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/**
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* Form validation
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*
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* @param array $data array of ("fieldname"=>value) of submitted data
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* @param array $files array of uploaded files "element_name"=>tmp_file_path
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* @return array of "element_name"=>"error_description" if there are errors,
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* or an empty array if everything is OK (true allowed for backwards compatibility too).
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*/
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public function validation($data, $files) {
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$errors = parent::validation($data, $files);
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// Completion: Don't let them choose automatic completion without turning
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// on some conditions.
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if (array_key_exists('completion', $data) &&
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$data['completion'] == COMPLETION_TRACKING_AUTOMATIC) {
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if (empty($data['completionview']) && empty($data['completionusegrade']) &&
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!$this->completion_rule_enabled($data)) {
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$errors['completion'] = get_string('badautocompletion', 'completion');
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}
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}
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return $errors;
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}
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/**
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* Returns if this form has custom completion rules. This is only possible if all selected modules have the same
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* module type and this module type supports custom completion rules
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*
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* @return bool
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*/
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public function has_custom_completion_rules() {
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return $this->hascustomrules;
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}
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/**
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* Return submitted data if properly submitted or returns NULL if validation fails or
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* if there is no submitted data.
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*
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* @return object submitted data; NULL if not valid or not submitted or cancelled
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*/
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public function get_data() {
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$data = parent::get_data();
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if ($data && $this->hascustomrules) {
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$this->get_module_form()->data_postprocessing($data);
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}
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return $data;
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}
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}
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