198 lines
7.2 KiB
PHP
198 lines
7.2 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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namespace customcertelement_userpicture;
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defined('MOODLE_INTERNAL') || die();
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/**
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* The customcert element userpicture's core interaction API.
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*
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* @package customcertelement_userpicture
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* @copyright 2017 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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class element extends \mod_customcert\element {
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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 \mod_customcert\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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$mform->addElement('text', 'width', get_string('width', 'customcertelement_userpicture'), array('size' => 10));
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$mform->setType('width', PARAM_INT);
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$mform->setDefault('width', 0);
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$mform->addHelpButton('width', 'width', 'customcertelement_userpicture');
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$mform->addElement('text', 'height', get_string('height', 'customcertelement_userpicture'), array('size' => 10));
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$mform->setType('height', PARAM_INT);
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$mform->setDefault('height', 0);
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$mform->addHelpButton('height', 'height', 'customcertelement_userpicture');
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if (get_config('customcert', 'showposxy')) {
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\mod_customcert\element_helper::render_form_element_position($mform);
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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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*
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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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// 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_userpicture');
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}
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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_userpicture');
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}
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// Validate the position.
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if (get_config('customcert', 'showposxy')) {
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$errors += \mod_customcert\element_helper::validate_form_element_position($data);
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}
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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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// Array of data we will be storing in the database.
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$arrtostore = array(
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'width' => (int) $data->width,
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'height' => (int) $data->height
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);
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return json_encode($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 \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 $user the user we are rendering this for
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*/
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public function render($pdf, $preview, $user) {
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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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$context = \context_user::instance($user->id);
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// Get files in the user icon area.
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$fs = get_file_storage();
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$files = $fs->get_area_files($context->id, 'user', 'icon', 0);
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// Get the file we want to display.
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$file = null;
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foreach ($files as $filefound) {
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if (!$filefound->is_directory()) {
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$file = $filefound;
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break;
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}
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}
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// Show image if we found one.
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if ($file) {
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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, $imageinfo->width, $imageinfo->height);
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} else if ($preview) { // Can't find an image, but we are in preview mode then display default pic.
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$location = $CFG->dirroot . '/pix/u/f1.png';
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$pdf->Image($location, $this->element->posx, $this->element->posy, $imageinfo->width, $imageinfo->height);
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}
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}
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/**
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* Render the element in html.
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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 function render_html() {
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global $PAGE, $USER;
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// If there is no element data, we have nothing to display.
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if (empty($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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// Get the image.
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$userpicture = new \user_picture($USER);
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$userpicture->size = 1;
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$url = $userpicture->get_url($PAGE)->out(false);
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// The size of the images to use in the CSS style.
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$style = '';
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if ($imageinfo->width === 0 && $imageinfo->height === 0) {
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// Do nothing.
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} else if ($imageinfo->width === 0) { // Then the height must be set.
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$style .= 'width: ' . $imageinfo->height . 'mm; ';
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$style .= 'height: ' . $imageinfo->height . 'mm';
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} else if ($imageinfo->height === 0) { // Then the width must be set.
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$style .= 'width: ' . $imageinfo->width . 'mm; ';
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$style .= 'height: ' . $imageinfo->width . 'mm';
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} else { // Must both be set.
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$style .= 'width: ' . $imageinfo->width . 'mm; ';
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$style .= 'height: ' . $imageinfo->height . 'mm';
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}
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return \html_writer::tag('img', '', array('src' => $url, 'style' => $style));
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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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*
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* @param \mod_customcert\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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// Set the image, width and height for this element.
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if (!empty($this->element->data)) {
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$imageinfo = json_decode($this->element->data);
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$this->element->width = $imageinfo->width;
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$this->element->height = $imageinfo->height;
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}
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parent::definition_after_data($mform);
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}
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}
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