430 lines
14 KiB
PHP
430 lines
14 KiB
PHP
<?php
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// This file is part of 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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* Class represents a customcert template.
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*
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* @package mod_customcert
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* @copyright 2015 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 represents a customcert template.
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*
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* @package mod_customcert
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* @copyright 2016 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 template {
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/**
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* @var int $id The id of the template.
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*/
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protected $id;
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/**
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* @var string $name The name of this template
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*/
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protected $name;
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/**
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* @var int $contextid The context id of this template
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*/
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protected $contextid;
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/**
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* The constructor.
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*
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* @param \stdClass $template
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*/
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public function __construct($template) {
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$this->id = $template->id;
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$this->name = $template->name;
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$this->contextid = $template->contextid;
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}
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/**
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* Handles saving data.
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*
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* @param \stdClass $data the template data
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*/
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public function save($data) {
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global $DB;
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$savedata = new \stdClass();
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$savedata->id = $this->id;
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$savedata->name = $data->name;
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$savedata->timemodified = time();
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$DB->update_record('customcert_templates', $savedata);
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}
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/**
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* Handles adding another page to the template.
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*
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* @return int the id of the page
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*/
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public function add_page() {
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global $DB;
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// Set the page number to 1 to begin with.
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$sequence = 1;
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// Get the max page number.
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$sql = "SELECT MAX(sequence) as maxpage
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FROM {customcert_pages} cp
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WHERE cp.templateid = :templateid";
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if ($maxpage = $DB->get_record_sql($sql, array('templateid' => $this->id))) {
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$sequence = $maxpage->maxpage + 1;
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}
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// New page creation.
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$page = new \stdClass();
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$page->templateid = $this->id;
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$page->width = '210';
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$page->height = '297';
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$page->sequence = $sequence;
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$page->timecreated = time();
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$page->timemodified = $page->timecreated;
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// Insert the page.
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return $DB->insert_record('customcert_pages', $page);
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}
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/**
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* Handles saving page data.
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*
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* @param \stdClass $data the template data
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*/
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public function save_page($data) {
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global $DB;
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// Set the time to a variable.
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$time = time();
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// Get the existing pages and save the page data.
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if ($pages = $DB->get_records('customcert_pages', array('templateid' => $data->tid))) {
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// Loop through existing pages.
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foreach ($pages as $page) {
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// Get the name of the fields we want from the form.
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$width = 'pagewidth_' . $page->id;
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$height = 'pageheight_' . $page->id;
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$leftmargin = 'pageleftmargin_' . $page->id;
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$rightmargin = 'pagerightmargin_' . $page->id;
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// Create the page data to update the DB with.
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$p = new \stdClass();
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$p->id = $page->id;
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$p->width = $data->$width;
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$p->height = $data->$height;
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$p->leftmargin = $data->$leftmargin;
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$p->rightmargin = $data->$rightmargin;
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$p->timemodified = $time;
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// Update the page.
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$DB->update_record('customcert_pages', $p);
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}
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}
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}
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/**
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* Handles deleting the template.
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*
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* @return bool return true if the deletion was successful, false otherwise
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*/
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public function delete() {
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global $DB;
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// Delete the elements.
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$sql = "SELECT e.*
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FROM {customcert_elements} e
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INNER JOIN {customcert_pages} p
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ON e.pageid = p.id
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WHERE p.templateid = :templateid";
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if ($elements = $DB->get_records_sql($sql, array('templateid' => $this->id))) {
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foreach ($elements as $element) {
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// Get an instance of the element class.
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if ($e = \mod_customcert\element::instance($element)) {
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$e->delete();
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} else {
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// The plugin files are missing, so just remove the entry from the DB.
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$DB->delete_records('customcert_elements', array('id' => $element->id));
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}
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}
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}
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// Delete the pages.
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if (!$DB->delete_records('customcert_pages', array('templateid' => $this->id))) {
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return false;
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}
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// Now, finally delete the actual template.
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if (!$DB->delete_records('customcert_templates', array('id' => $this->id))) {
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return false;
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}
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return true;
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}
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/**
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* Handles deleting a page from the template.
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*
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* @param int $pageid the template page
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*/
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public function delete_page($pageid) {
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global $DB;
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// Get the page.
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$page = $DB->get_record('customcert_pages', array('id' => $pageid), '*', MUST_EXIST);
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// Delete this page.
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$DB->delete_records('customcert_pages', array('id' => $page->id));
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// The element may have some extra tasks it needs to complete to completely delete itself.
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if ($elements = $DB->get_records('customcert_elements', array('pageid' => $page->id))) {
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foreach ($elements as $element) {
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// Get an instance of the element class.
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if ($e = \mod_customcert\element::instance($element)) {
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$e->delete();
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} else {
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// The plugin files are missing, so just remove the entry from the DB.
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$DB->delete_records('customcert_elements', array('id' => $element->id));
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}
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}
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}
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// Now we want to decrease the page number values of
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// the pages that are greater than the page we deleted.
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$sql = "UPDATE {customcert_pages}
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SET sequence = sequence - 1
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WHERE templateid = :templateid
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AND sequence > :sequence";
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$DB->execute($sql, array('templateid' => $this->id, 'sequence' => $page->sequence));
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}
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/**
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* Handles deleting an element from the template.
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*
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* @param int $elementid the template page
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*/
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public function delete_element($elementid) {
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global $DB;
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// Ensure element exists and delete it.
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$element = $DB->get_record('customcert_elements', array('id' => $elementid), '*', MUST_EXIST);
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// Get an instance of the element class.
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if ($e = \mod_customcert\element::instance($element)) {
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$e->delete();
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} else {
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// The plugin files are missing, so just remove the entry from the DB.
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$DB->delete_records('customcert_elements', array('id' => $elementid));
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}
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// Now we want to decrease the sequence numbers of the elements
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// that are greater than the element we deleted.
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$sql = "UPDATE {customcert_elements}
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SET sequence = sequence - 1
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WHERE pageid = :pageid
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AND sequence > :sequence";
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$DB->execute($sql, array('pageid' => $element->pageid, 'sequence' => $element->sequence));
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}
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/**
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* Generate the PDF for the template.
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*
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* @param bool $preview true if it is a preview, false otherwise
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* @param int $userid the id of the user whose certificate we want to view
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*/
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public function generate_pdf($preview = false, $userid = null) {
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global $CFG, $DB, $USER;
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if (empty($userid)) {
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$user = $USER;
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} else {
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$user = \core_user::get_user($userid);
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}
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require_once($CFG->libdir . '/pdflib.php');
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// Get the pages for the template, there should always be at least one page for each template.
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if ($pages = $DB->get_records('customcert_pages', array('templateid' => $this->id), 'sequence ASC')) {
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// Create the pdf object.
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$pdf = new \pdf();
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// If the template belongs to a certificate then we need to check what permissions we set for it.
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if ($protection = $DB->get_field('customcert', 'protection', array('templateid' => $this->id))) {
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if (!empty($protection)) {
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$protection = explode(', ', $protection);
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$pdf->SetProtection($protection);
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}
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}
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$pdf->setPrintHeader(false);
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$pdf->setPrintFooter(false);
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$pdf->SetTitle($this->name);
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$pdf->SetAutoPageBreak(true, 0);
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// Remove full-stop at the end, if it exists, to avoid "..pdf" being created and being filtered by clean_filename.
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$filename = rtrim($this->name, '.');
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$filename = clean_filename($filename . '.pdf');
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// Loop through the pages and display their content.
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foreach ($pages as $page) {
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// Add the page to the PDF.
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if ($page->width > $page->height) {
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$orientation = 'L';
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} else {
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$orientation = 'P';
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}
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$pdf->AddPage($orientation, array($page->width, $page->height));
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$pdf->SetMargins($page->leftmargin, 0, $page->rightmargin);
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// Get the elements for the page.
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if ($elements = $DB->get_records('customcert_elements', array('pageid' => $page->id), 'sequence ASC')) {
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// Loop through and display.
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foreach ($elements as $element) {
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// Get an instance of the element class.
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if ($e = \mod_customcert\element::instance($element)) {
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$e->render($pdf, $preview, $user);
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}
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}
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}
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}
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$pdf->Output($filename, 'D');
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}
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}
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/**
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* Handles moving an item on a template.
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*
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* @param string $itemname the item we are moving
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* @param int $itemid the id of the item
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* @param string $direction the direction
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*/
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public function move_item($itemname, $itemid, $direction) {
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global $DB;
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$table = 'customcert_';
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if ($itemname == 'page') {
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$table .= 'pages';
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} else { // Must be an element.
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$table .= 'elements';
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}
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if ($moveitem = $DB->get_record($table, array('id' => $itemid))) {
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// Check which direction we are going.
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if ($direction == 'up') {
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$sequence = $moveitem->sequence - 1;
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} else { // Must be down.
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$sequence = $moveitem->sequence + 1;
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}
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// Get the item we will be swapping with. Make sure it is related to the same template (if it's
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// a page) or the same page (if it's an element).
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if ($itemname == 'page') {
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$params = array('templateid' => $moveitem->templateid);
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} else { // Must be an element.
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$params = array('pageid' => $moveitem->pageid);
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}
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$swapitem = $DB->get_record($table, $params + array('sequence' => $sequence));
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}
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// Check that there is an item to move, and an item to swap it with.
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if ($moveitem && !empty($swapitem)) {
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$DB->set_field($table, 'sequence', $swapitem->sequence, array('id' => $moveitem->id));
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$DB->set_field($table, 'sequence', $moveitem->sequence, array('id' => $swapitem->id));
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}
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}
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/**
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* Returns the id of the template.
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*
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* @return int the id of the template
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*/
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public function get_id() {
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return $this->id;
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}
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/**
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* Returns the name of the template.
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*
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* @return string the name of the template
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*/
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public function get_name() {
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return $this->name;
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}
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/**
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* Returns the context id.
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*
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* @return int the context id
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*/
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public function get_contextid() {
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return $this->contextid;
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}
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/**
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* Returns the context id.
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*
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* @return \context the context
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*/
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public function get_context() {
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return \context::instance_by_id($this->contextid);
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}
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/**
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* Returns the context id.
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*
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* @return \context_module|null the context module, null if there is none
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*/
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public function get_cm() {
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$context = $this->get_context();
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if ($context->contextlevel === CONTEXT_MODULE) {
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return get_coursemodule_from_id('customcert', $context->instanceid, 0, false, MUST_EXIST);
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}
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return null;
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}
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/**
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* Ensures the user has the proper capabilities to manage this template.
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*
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* @throws \required_capability_exception if the user does not have the necessary capabilities (ie. Fred)
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*/
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public function require_manage() {
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require_capability('mod/customcert:manage', $this->get_context());
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}
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/**
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* Creates a template.
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*
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* @param string $templatename the name of the template
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* @param int $contextid the context id
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* @return \mod_customcert\template the template object
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*/
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public static function create($templatename, $contextid) {
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global $DB;
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$template = new \stdClass();
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$template->name = $templatename;
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$template->contextid = $contextid;
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$template->timecreated = time();
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$template->timemodified = $template->timecreated;
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$template->id = $DB->insert_record('customcert_templates', $template);
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return new \mod_customcert\template($template);
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}
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}
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