296 lines
9.8 KiB
PHP
296 lines
9.8 KiB
PHP
<?php
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// This file is part of the customcert module for 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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* The base class for the customcert elements.
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*
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* @package mod_customcert
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* @copyright 2013 Mark Nelson <markn@moodle.com>
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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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namespace mod_customcert;
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defined('MOODLE_INTERNAL') || die();
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/**
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* Class element
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*
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* All customercert element plugins are based on this class.
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*
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* @package mod_customcert
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* @copyright 2013 Mark Nelson <markn@moodle.com>
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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 element {
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/**
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* @var \stdClass $element The data for the element we are adding.
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*/
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public $element;
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/**
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* @var bool $showposxy Show position XY form elements?
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*/
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public $showposxy;
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/**
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* Constructor.
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*
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* @param \stdClass $element the element data
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*/
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public function __construct($element) {
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$showposxy = get_config('customcert', 'showposxy');
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$this->element = clone($element);
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$this->showposxy = isset($showposxy) && $showposxy;
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}
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/**
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* This function renders the form elements when adding a customcert element.
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* Can be overridden if more functionality is needed.
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*
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* @param edit_element_form $mform the edit_form instance.
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*/
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public function render_form_elements($mform) {
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// Render the common elements.
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element_helper::render_form_element_font($mform);
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element_helper::render_form_element_colour($mform);
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if ($this->showposxy) {
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element_helper::render_form_element_position($mform);
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}
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element_helper::render_form_element_width($mform);
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}
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/**
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* Sets the data on the form when editing an element.
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* Can be overridden if more functionality is needed.
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*
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* @param edit_element_form $mform the edit_form instance
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*/
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public function definition_after_data($mform) {
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// Loop through the properties of the element and set the values
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// of the corresponding form element, if it exists.
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foreach ($this->element as $property => $value) {
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if ($mform->elementExists($property)) {
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$element = $mform->getElement($property);
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$element->setValue($value);
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}
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}
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}
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/**
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* Performs validation on the element values.
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* Can be overridden if more functionality is needed.
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*
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* @param array $data the submitted data
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* @param array $files the submitted files
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* @return array the validation errors
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*/
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public function validate_form_elements($data, $files) {
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// Array to return the errors.
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$errors = array();
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// Common validation methods.
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$errors += element_helper::validate_form_element_colour($data);
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if ($this->showposxy) {
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$errors += element_helper::validate_form_element_position($data);
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}
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$errors += element_helper::validate_form_element_width($data);
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return $errors;
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}
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/**
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* Handles saving the form elements created by this element.
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* Can be overridden if more functionality is needed.
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*
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* @param \stdClass $data the form data
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* @return bool true of success, false otherwise.
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*/
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public function save_form_elements($data) {
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global $DB;
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// Get the data from the form.
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$element = new \stdClass();
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$element->name = $data->name;
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$element->data = $this->save_unique_data($data);
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$element->font = (isset($data->font)) ? $data->font : null;
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$element->size = (isset($data->size)) ? $data->size : null;
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$element->colour = (isset($data->colour)) ? $data->colour : null;
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if ($this->showposxy) {
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$element->posx = (isset($data->posx)) ? $data->posx : null;
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$element->posy = (isset($data->posy)) ? $data->posy : null;
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}
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$element->width = (isset($data->width)) ? $data->width : null;
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$element->refpoint = (isset($data->refpoint)) ? $data->refpoint : null;
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$element->timemodified = time();
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// Check if we are updating, or inserting a new element.
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if (!empty($this->element->id)) { // Must be updating a record in the database.
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$element->id = $this->element->id;
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return $DB->update_record('customcert_elements', $element);
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} else { // Must be adding a new one.
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$element->element = $data->element;
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$element->pageid = $data->pageid;
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$element->sequence = \mod_customcert\element_helper::get_element_sequence($element->pageid);
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$element->timecreated = time();
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return $DB->insert_record('customcert_elements', $element, false);
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}
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}
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/**
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* This will handle how form data will be saved into the data column in the
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* customcert_elements table.
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* Can be overridden if more functionality is needed.
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*
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* @param \stdClass $data the form data
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* @return string the unique data to save
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*/
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public function save_unique_data($data) {
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return '';
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}
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/**
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* This handles copying data from another element of the same type.
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* Can be overridden if more functionality is needed.
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*
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* @param \stdClass $data the form data
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* @return bool returns true if the data was copied successfully, false otherwise
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*/
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public function copy_element($data) {
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return true;
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}
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/**
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* Handles rendering the element on the pdf.
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*
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* Must be overridden.
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*
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* @param \pdf $pdf the pdf object
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* @param bool $preview true if it is a preview, false otherwise
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* @param \stdClass $user the user we are rendering this for
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*/
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public abstract function render($pdf, $preview, $user);
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/**
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* Render the element in html.
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*
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* Must be overridden.
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*
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* This function is used to render the element when we are using the
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* drag and drop interface to position it.
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*
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* @return string the html
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*/
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public abstract function render_html();
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/**
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* Handles deleting any data this element may have introduced.
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* Can be overridden if more functionality is needed.
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*
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* @return bool success return true if deletion success, false otherwise
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*/
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public function delete() {
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global $DB;
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return $DB->delete_records('customcert_elements', array('id' => $this->element->id));
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}
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/**
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* This function is responsible for handling the restoration process of the element.
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*
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* For example, the function may save data that is related to another course module, this
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* data will need to be updated if we are restoring the course as the course module id will
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* be different in the new course.
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*
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* @param \restore_customcert_activity_task $restore
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*/
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public function after_restore($restore) {
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}
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/**
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* Magic getter for read only access.
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*
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* @param string $name
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*/
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public function __get($name) {
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if (property_exists($this->element, $name)) {
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return $this->element->$name;
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}
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}
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/**
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* Returns an instance of the element class.
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*
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* @param \stdClass $element the element
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* @return \mod_customcert\element|bool returns the instance of the element class, or false if element
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* class does not exists.
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*/
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public static function instance($element) {
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// Get the class name.
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$classname = '\\customcertelement_' . $element->element . '\\element';
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// Ensure the necessary class exists.
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if (class_exists($classname)) {
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return new $classname($element);
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}
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return false;
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}
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/**
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* Return the list of possible elements to add.
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*
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* @return array the list of element types that can be used.
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*/
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public static function get_available_types() {
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global $CFG;
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// Array to store the element types.
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$options = array();
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// Check that the directory exists.
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$elementdir = "$CFG->dirroot/mod/customcert/element";
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if (file_exists($elementdir)) {
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// Get directory contents.
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$elementfolders = new \DirectoryIterator($elementdir);
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// Loop through the elements folder.
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foreach ($elementfolders as $elementfolder) {
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// If it is not a directory or it is '.' or '..', skip it.
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if (!$elementfolder->isDir() || $elementfolder->isDot()) {
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continue;
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}
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// Check that the standard class exists, if not we do
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// not want to display it as an option as it will not work.
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$foldername = $elementfolder->getFilename();
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// Get the class name.
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$classname = '\\customcertelement_' . $foldername . '\\element';
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// Ensure the necessary class exists.
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if (class_exists($classname)) {
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$component = "customcertelement_{$foldername}";
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$options[$foldername] = get_string('pluginname', $component);
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}
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}
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}
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\core_collator::asort($options);
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return $options;
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}
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}
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