moodle-mod_htmlcert/element/bgimage/classes/element.php

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<?php
// This file is part of the customcert module for Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
* This file contains the customcert element background image's core interaction API.
*
* @package customcertelement_bgimage
* @copyright 2016 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
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namespace customcertelement_bgimage;
defined('MOODLE_INTERNAL') || die();
/**
* The customcert element background image's core interaction API.
*
* @package customcertelement_bgimage
* @copyright 2016 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class element extends \customcertelement_image\element {
/**
* This function renders the form elements when adding a customcert element.
*
* @param \mod_customcert\edit_element_form $mform the edit_form instance
*/
public function render_form_elements($mform) {
$mform->addElement('select', 'image', get_string('image', 'customcertelement_image'), self::get_images());
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$mform->addElement('filemanager', 'customcertimage', get_string('uploadimage', 'customcert'), '',
$this->filemanageroptions);
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}
/**
* Performs validation on the element values.
*
* @param array $data the submitted data
* @param array $files the submitted files
* @return array the validation errors
*/
public function validate_form_elements($data, $files) {
// Array to return the errors.
return array();
}
/**
* This will handle how form data will be saved into the data column in the
* customcert_elements table.
*
* @param \stdClass $data the form data
* @return string the json encoded array
*/
public function save_unique_data($data) {
// Array of data we will be storing in the database.
$arrtostore = array(
'pathnamehash' => $data->image,
'width' => 0,
'height' => 0
);
return json_encode($arrtostore);
}
/**
* Handles rendering the element on the pdf.
*
* @param \pdf $pdf the pdf object
* @param bool $preview true if it is a preview, false otherwise
* @param \stdClass $user the user we are rendering this for
*/
public function render($pdf, $preview, $user) {
global $CFG;
// If there is no element data, we have nothing to display.
if (empty($this->element->data)) {
return;
}
$imageinfo = json_decode($this->element->data);
// Get the image.
$fs = get_file_storage();
if ($file = $fs->get_file_by_hash($imageinfo->pathnamehash)) {
$contenthash = $file->get_contenthash();
$l1 = $contenthash[0] . $contenthash[1];
$l2 = $contenthash[2] . $contenthash[3];
$location = $CFG->dataroot . '/filedir' . '/' . $l1 . '/' . $l2 . '/' . $contenthash;
// Set the image to the size of the PDF page.
$pdf->Image($location, 0, 0, $pdf->getPageWidth(), $pdf->getPageHeight());
}
}
/**
* Render the element in html.
*
* This function is used to render the element when we are using the
* drag and drop interface to position it.
*
* @return string the html
*/
public function render_html() {
global $DB;
// If there is no element data, we have nothing to display.
if (empty($this->element->data)) {
return '';
}
$imageinfo = json_decode($this->element->data);
// Get the image.
$fs = get_file_storage();
if ($file = $fs->get_file_by_hash($imageinfo->pathnamehash)) {
$url = \moodle_url::make_pluginfile_url($file->get_contextid(), 'mod_customcert', 'image', $file->get_itemid(),
$file->get_filepath(), $file->get_filename());
// Get the page we are rendering this on.
$page = $DB->get_record('customcert_pages', array('id' => $this->element->pageid), '*', MUST_EXIST);
// Set the image to the size of the page.
$style = 'width: ' . $page->width . 'mm; height: ' . $page->height . 'mm';
return \html_writer::tag('img', '', array('src' => $url, 'style' => $style));
}
}
}