494 lines
18 KiB
PHP
494 lines
18 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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defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
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/**
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* Class customcert_element_base
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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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abstract class customcert_element_base {
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/**
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* 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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* 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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$this->element = clone($element);
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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 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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// Render the common elements.
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$this->render_form_element_font($mform);
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$this->render_form_element_colour($mform);
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$this->render_form_element_position($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 mod_customcert_edit_element_form $mform the edit_form instance
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* @param array the form elements to set
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*/
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public function definition_after_data($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 += $this->validate_form_element_colour($data);
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$errors += $this->validate_form_element_position($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 $data the form data
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*/
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public function save_form_elements($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)) ? $data->colour : null;
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$element->posx = (isset($data->posx)) ? $data->posx : null;
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$element->posy = (isset($data->posy)) ? $data->posy : null;
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$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 = $this->element->id;
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$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 = $this->get_element_sequence($element->pageid);
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$element->timecreated = time();
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$DB->insert_record('customcert_elements', $element);
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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 column.
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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 will handle how individual elements save their data
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* to a template to be loaded later.
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* Can be overridden if more functionality is needed.
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*
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* @param stdClass $data the form data
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* @return bool returns true if the data was saved to the template, false otherwise
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*/
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public function save_data_to_template($data) {
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return true;
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}
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/**
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* This will handle how individual elements load their data
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* from a template to an existing customcert.
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* Can be overridden if more functionality is needed.
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*
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* @param stdClass $data the form data
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* @return bool returns true if the data was loaded from the template, false otherwise
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*/
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public function load_data_from_template($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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* Must be overridden.
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*
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* @param pdf $pdf the pdf object
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* @param bool $preview true if it is a preview, false otherwise
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*/
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public abstract function render($pdf, $preview);
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/**
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* Common behaviour for rendering specified content on the pdf.
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*
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* @param pdf $pdf the pdf object
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* @param string $content the content to render
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*/
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public function render_content($pdf, $content) {
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list($font, $attr) = $this->get_font();
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$pdf->setFont($font, $attr, $this->element->size);
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$fontcolour = TCPDF_COLORS::convertHTMLColorToDec($this->element->colour, $fontcolour);
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$pdf->SetTextColor($fontcolour['R'], $fontcolour['G'], $fontcolour['B']);
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$x = $this->element->posx;
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$y = $this->element->posy;
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$w = $this->element->width;
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$refpoint = $this->element->refpoint;
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$actualwidth = $pdf->GetStringWidth($content);
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if ($w and $w < $actualwidth) {
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$actualwidth = $w;
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}
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switch ($refpoint) {
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case CUSTOMCERT_REF_POINT_TOPRIGHT:
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$x = $this->element->posx - $actualwidth;
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if ($x < 0) {
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$x = 0;
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$w = $this->element->posx;
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} else {
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$w = $actualwidth;
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}
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break;
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case CUSTOMCERT_REF_POINT_TOPCENTER:
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$x = $this->element->posx - $actualwidth / 2;
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if ($x < 0) {
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$x = 0;
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$w = $this->element->posx * 2;
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} else {
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$w = $actualwidth;
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}
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break;
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}
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if ($w) {
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$w += 0.0001;
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}
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$pdf->setCellPaddings(0, 0, 0, 0);
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$pdf->writeHTMLCell($w, 0, $x, $y, $content, 0, 0, false, true);
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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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* 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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public abstract function render_html();
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/**
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* Common behaviour for rendering specified content on the drag and drop page.
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*
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* @param string $content the content to render
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* @return string the html
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*/
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public function render_html_content($content) {
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list($font, $attr) = $this->get_font();
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$fontstyle = 'font-family: ' . $font;
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if (strpos($attr, 'B') !== false) {
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$fontstyle .= ': font-weight: bold';
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}
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if (strpos($attr, 'I') !== false) {
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$fontstyle .= ': font-style: italic';
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}
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$style = $fontstyle . '; color: ' . $this->element->colour . '; font-size: ' . $this->element->size . 'pt';
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return html_writer::tag('span', $content, array('style' => $style));
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}
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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_element() {
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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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* Helper function that returns the sequence on a specified customcert page for a
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* newly created element.
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*
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* @param int $pageid the id of the page we are adding this element to
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* @return int the element number
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*/
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public static function get_element_sequence($pageid) {
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global $DB;
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// Set the sequence of the element we are creating.
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$sequence = 1;
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// Check if there already elements that exist, if so, overwrite value.
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$sql = "SELECT MAX(sequence) as maxsequence
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FROM {customcert_elements}
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WHERE pageid = :id";
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// Get the current max sequence on this page and add 1 to get the new sequence.
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if ($maxseq = $DB->get_record_sql($sql, array('id' => $pageid))) {
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$sequence = $maxseq->maxsequence + 1;
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}
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return $sequence;
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}
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/**
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* Helper function to render the font elements.
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*
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* @param mod_customcert_edit_element_form $mform the edit_form instance.
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*/
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public function render_form_element_font($mform) {
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$mform->addElement('select', 'font', get_string('font', 'customcert'), customcert_get_fonts());
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$mform->setType('font', PARAM_TEXT);
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$mform->setDefault('font', 'times');
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$mform->addHelpButton('font', 'font', 'customcert');
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$mform->addElement('select', 'size', get_string('fontsize', 'customcert'), customcert_get_font_sizes());
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$mform->setType('size', PARAM_INT);
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$mform->setDefault('size', 12);
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$mform->addHelpButton('size', 'fontsize', 'customcert');
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}
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/**
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* Helper function to render the colour elements.
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*
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* @param mod_customcert_edit_element_form $mform the edit_form instance.
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*/
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public function render_form_element_colour($mform) {
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$mform->addElement('customcert_colourpicker', 'colour', get_string('fontcolour', 'customcert'));
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$mform->setType('colour', PARAM_RAW); // Need to validate that this is a valid colour.
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$mform->setDefault('colour', '#000000');
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$mform->addHelpButton('colour', 'fontcolour', 'customcert');
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}
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/**
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* Helper function to render the position elements.
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*
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* @param mod_customcert_edit_element_form $mform the edit_form instance.
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*/
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public function render_form_element_position($mform) {
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$mform->addElement('text', 'posx', get_string('posx', 'customcert'), array('size' => 10));
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$mform->setType('posx', PARAM_INT);
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$mform->setDefault('posx', 0);
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$mform->addHelpButton('posx', 'posx', 'customcert');
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$mform->addElement('text', 'posy', get_string('posy', 'customcert'), array('size' => 10));
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$mform->setType('posy', PARAM_INT);
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$mform->setDefault('posy', 0);
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$mform->addHelpButton('posy', 'posy', 'customcert');
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$mform->addElement('text', 'width', get_string('elementwidth', 'customcert'), array('size' => 10));
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$mform->setType('width', PARAM_INT);
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$mform->setDefault('width', 0);
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$mform->addHelpButton('width', 'elementwidth', 'customcert');
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$refpointoptions = array();
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$refpointoptions[CUSTOMCERT_REF_POINT_TOPLEFT] = get_string('topleft', 'customcert');
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$refpointoptions[CUSTOMCERT_REF_POINT_TOPCENTER] = get_string('topcenter', 'customcert');
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$refpointoptions[CUSTOMCERT_REF_POINT_TOPRIGHT] = get_string('topright', 'customcert');
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$mform->addElement('select', 'refpoint', get_string('refpoint', 'customcert'), $refpointoptions);
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$mform->setType('refpoint', PARAM_INT);
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$mform->setDefault('refpoint', CUSTOMCERT_REF_POINT_TOPCENTER);
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$mform->addHelpButton('refpoint', 'refpoint', 'customcert');
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}
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/**
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* Helper function to performs validation on the colour element.
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*
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* @param array $data the submitted data
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* @return array the validation errors
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*/
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public function validate_form_element_colour($data) {
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$errors = array();
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// Validate the colour.
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if (!$this->validate_colour($data['colour'])) {
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$errors['colour'] = get_string('invalidcolour', 'customcert');
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}
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return $errors;
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}
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/**
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* Helper function to performs validation on the position elements.
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*
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* @param array $data the submitted data
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* @return array the validation errors
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*/
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public function validate_form_element_position($data) {
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$errors = array();
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// Check if posx is not set, or not numeric or less than 0.
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if ((!isset($data['posx'])) || (!is_numeric($data['posx'])) || ($data['posx'] < 0)) {
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$errors['posx'] = get_string('invalidposition', 'customcert', 'X');
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}
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// Check if posy is not set, or not numeric or less than 0.
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if ((!isset($data['posy'])) || (!is_numeric($data['posy'])) || ($data['posy'] < 0)) {
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$errors['posy'] = get_string('invalidposition', 'customcert', 'Y');
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}
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// Check if width is less than 0.
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if (isset($data['width']) && $data['width'] < 0) {
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$errors['width'] = get_string('invalidelementwidth', 'customcert');
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}
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return $errors;
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}
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/**
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* Returns the font used for this element.
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*
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* @return array the font and font attributes
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*/
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public function get_font() {
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// Variable for the font.
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$font = $this->element->font;
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// Get the last two characters of the font name.
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$fontlength = strlen($font);
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$lastchar = $font[$fontlength - 1];
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$secondlastchar = $font[$fontlength - 2];
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// The attributes of the font.
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$attr = '';
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// Check if the last character is 'i'.
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if ($lastchar == 'i') {
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// Remove the 'i' from the font name.
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$font = substr($font, 0, -1);
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// Check if the second last char is b.
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if ($secondlastchar == 'b') {
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// Remove the 'b' from the font name.
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$font = substr($font, 0, -1);
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$attr .= 'B';
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}
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$attr .= 'I';
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} else if ($lastchar == 'b') {
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// Remove the 'b' from the font name.
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$font = substr($font, 0, -1);
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$attr .= 'B';
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}
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return array($font, $attr);
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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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* Validates the colour selected.
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*
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* @param string $colour
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* @return bool returns true if the colour is valid, false otherwise
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*/
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protected function validate_colour($colour) {
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// List of valid HTML colour names.
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$colournames = array(
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'aliceblue', 'antiquewhite', 'aqua', 'aquamarine', 'azure',
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'beige', 'bisque', 'black', 'blanchedalmond', 'blue',
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'blueviolet', 'brown', 'burlywood', 'cadetblue', 'chartreuse',
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'chocolate', 'coral', 'cornflowerblue', 'cornsilk', 'crimson',
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'cyan', 'darkblue', 'darkcyan', 'darkgoldenrod', 'darkgray',
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'darkgrey', 'darkgreen', 'darkkhaki', 'darkmagenta',
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'darkolivegreen', 'darkorange', 'darkorchid', 'darkred',
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'darksalmon', 'darkseagreen', 'darkslateblue', 'darkslategray',
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'darkslategrey', 'darkturquoise', 'darkviolet', 'deeppink',
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'deepskyblue', 'dimgray', 'dimgrey', 'dodgerblue', 'firebrick',
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'floralwhite', 'forestgreen', 'fuchsia', 'gainsboro',
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'ghostwhite', 'gold', 'goldenrod', 'gray', 'grey', 'green',
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'greenyellow', 'honeydew', 'hotpink', 'indianred', 'indigo',
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'ivory', 'khaki', 'lavender', 'lavenderblush', 'lawngreen',
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'lemonchiffon', 'lightblue', 'lightcoral', 'lightcyan',
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'lightgoldenrodyellow', 'lightgray', 'lightgrey', 'lightgreen',
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'lightpink', 'lightsalmon', 'lightseagreen', 'lightskyblue',
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'lightslategray', 'lightslategrey', 'lightsteelblue', 'lightyellow',
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'lime', 'limegreen', 'linen', 'magenta', 'maroon',
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'mediumaquamarine', 'mediumblue', 'mediumorchid', 'mediumpurple',
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'mediumseagreen', 'mediumslateblue', 'mediumspringgreen',
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'mediumturquoise', 'mediumvioletred', 'midnightblue', 'mintcream',
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'mistyrose', 'moccasin', 'navajowhite', 'navy', 'oldlace', 'olive',
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'olivedrab', 'orange', 'orangered', 'orchid', 'palegoldenrod',
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'palegreen', 'paleturquoise', 'palevioletred', 'papayawhip',
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'peachpuff', 'peru', 'pink', 'plum', 'powderblue', 'purple', 'red',
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'rosybrown', 'royalblue', 'saddlebrown', 'salmon', 'sandybrown',
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'seagreen', 'seashell', 'sienna', 'silver', 'skyblue', 'slateblue',
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'slategray', 'slategrey', 'snow', 'springgreen', 'steelblue', 'tan',
|
|
'teal', 'thistle', 'tomato', 'turquoise', 'violet', 'wheat', 'white',
|
|
'whitesmoke', 'yellow', 'yellowgreen'
|
|
);
|
|
|
|
if (preg_match('/^#?([[:xdigit:]]{3}){1,2}$/', $colour)) {
|
|
return true;
|
|
} else if (in_array(strtolower($colour), $colournames)) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|