193 lines
7 KiB
PHP
193 lines
7 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 image elements core interaction API.
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*
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* @package customcertelement_image
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* @copyright 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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defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
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require_once($CFG->dirroot . '/mod/customcert/elements/element.class.php');
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class customcert_element_image extends customcert_element_base {
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/**
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* This function is responsible for adding the element for the first time
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* to the database when no data has yet been specified, default values set.
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* Can be overridden if more functionality is needed.
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*
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* @param string $element the name of the element
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* @param int $pageid the page id we are saving it to
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*/
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public static function add_element($element, $pageid) {
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global $DB;
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$data = customcert_element_base::get_required_attributes($element, $pageid);
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$data->width = '0';
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$data->height = '0';
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$data->posx = '0';
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$data->posy = '0';
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$DB->insert_record('customcert_elements', $data);
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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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*
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* @param stdClass $mform the edit_form instance.
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*/
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public function render_form_elements($mform) {
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$image = '';
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$width = '0';
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$height = '0';
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// Check if there is any data for this element.
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if (!empty($this->element->data)) {
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$imageinfo = json_decode($this->element->data);
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$image = $imageinfo->pathnamehash;
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$width = $imageinfo->width;
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$height = $imageinfo->height;
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}
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$mform->addElement('select', 'image_' . $this->element->id, get_string('image', 'customcertelement_image'), self::get_images());
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$mform->setDefault('image_' . $this->element->id, $image);
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$mform->addElement('text', 'imagewidth_' . $this->element->id, get_string('width', 'customcertelement_image'), array('size' => 10));
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$mform->setType('imagewidth_' . $this->element->id, PARAM_INT);
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$mform->setDefault('imagewidth_' . $this->element->id, $width);
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$mform->addHelpButton('imagewidth_' . $this->element->id, 'width', 'customcertelement_image');
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$mform->addElement('text', 'imageheight_' . $this->element->id, get_string('height', 'customcertelement_image'), array('size' => 10));
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$mform->setType('imageheight_' . $this->element->id, PARAM_INT);
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$mform->setDefault('imageheight_' . $this->element->id, $height);
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$mform->addHelpButton('imageheight_' . $this->element->id, 'height', 'customcertelement_image');
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parent::render_form_elements_position($mform);
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}
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/**
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* Performs validation on the element values.
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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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// Get width.
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$width = 'imagewidth_' . $this->element->id;
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// Check if width is not set, or not numeric or less than 0.
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if ((!isset($data[$width])) || (!is_numeric($data[$width])) || ($data[$width] < 0)) {
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$errors[$width] = get_string('invalidwidth', 'customcertelement_image');
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}
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// Get height.
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$height = 'imageheight_' . $this->element->id;
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// Check if height is not set, or not numeric or less than 0.
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if ((!isset($data[$height])) || (!is_numeric($data[$height])) || ($data[$height] < 0)) {
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$errors[$height] = get_string('invalidheight', 'customcertelement_image');
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}
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// Validate the position.
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$errors += $this->validate_form_elements_position($data);
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return $errors;
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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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*
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* @param stdClass $data the form data.
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* @return string the json encoded array
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*/
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public function save_unique_data($data) {
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// Get the date item and format from the form.
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$image = 'image_' . $this->element->id;
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$image = $data->$image;
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$width = 'imagewidth_' . $this->element->id;
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$width = $data->$width;
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$height = 'imageheight_' . $this->element->id;
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$height = $data->$height;
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// Array of data we will be storing in the database.
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$arrtostore = array(
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'pathnamehash' => $image,
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'width' => $width,
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'height' => $height
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);
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return json_encode($arrtostore);
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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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* @param stdClass $pdf the pdf object
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* @param int $userid
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*/
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public function render($pdf, $userid) {
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global $CFG;
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// If there is no element data, we have nothing to display.
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if (empty($this->element->data)) {
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return;
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}
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$imageinfo = json_decode($this->element->data);
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$image = $imageinfo->pathnamehash;
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$width = $imageinfo->width;
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$height = $imageinfo->height;
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// Get the image.
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$fs = get_file_storage();
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if ($file = $fs->get_file_by_hash($image)) {
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$contenthash = $file->get_contenthash();
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$l1 = $contenthash[0] . $contenthash[1];
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$l2 = $contenthash[2] . $contenthash[3];
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$location = $CFG->dataroot . '/filedir' . '/' . $l1 . '/' . $l2 . '/' . $contenthash;
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$pdf->Image($location, $this->element->posx, $this->element->posy, $width, $height);
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}
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}
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/**
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* Return the list of possible images to use.
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*
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* @return array the list of images that can be used.
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*/
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public static function get_images() {
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// Create file storage object.
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$fs = get_file_storage();
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// The array used to store the images.
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$arrfiles = array();
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$arrfiles[0] = get_string('noimage', 'customcert');
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if ($files = $fs->get_area_files(context_system::instance()->id, 'mod_customcert', 'image', false, 'filename', false)) {
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foreach ($files as $hash => $file) {
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$arrfiles[$hash] = $file->get_filename();
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}
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}
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return $arrfiles;
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}
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}
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