756 lines
25 KiB
PHP
756 lines
25 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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* Customcert module internal API.
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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();
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/**
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* @var string the print protection variable
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*/
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define('PROTECTION_PRINT', 'print');
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/**
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* @var string the modify protection variable
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*/
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define('PROTECTION_MODIFY', 'modify');
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/**
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* @var string the copy protection variable
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*/
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define('PROTECTION_COPY', 'copy');
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/**
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* @var int the number of issues that will be displayed on each page in the report
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* If you want to display all customcerts on a page set this to 0.
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*/
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define('CUSTOMCERT_PER_PAGE', 20);
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/**
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* @var int the max number of issues to display
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*/
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define('CUSTOMCERT_MAX_PER_PAGE', 300);
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/**
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* Handles setting the protection field for the customcert
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*
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* @param stdClass $data
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* @return string the value to insert into the protection field
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*/
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function customcert_set_protection($data) {
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$protection = array();
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if (!empty($data->protection_print)) {
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$protection[] = PROTECTION_PRINT;
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}
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if (!empty($data->protection_modify)) {
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$protection[] = PROTECTION_MODIFY;
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}
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if (!empty($data->protection_copy)) {
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$protection[] = PROTECTION_COPY;
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}
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// Return the protection string.
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return implode(', ', $protection);
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}
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/**
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* Handles uploading an image for the customcert module.
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*
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* @param int $draftitemid the draft area containing the files
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* @param int $contextid the context we are storing this image in
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*/
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function customcert_upload_imagefiles($draftitemid, $contextid) {
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// Save the file if it exists that is currently in the draft area.
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file_save_draft_area_files($draftitemid, $contextid, 'mod_customcert', 'image', 0);
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}
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/**
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* Return the list of possible elements to add.
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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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function customcert_get_elements() {
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global $CFG;
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// Array to store the element types.
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$options = array();
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// Check that the directory exists.
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$elementdir = "$CFG->dirroot/mod/customcert/element";
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if (file_exists($elementdir)) {
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// Get directory contents.
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$elementfolders = new DirectoryIterator($elementdir);
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// Loop through the elements folder.
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foreach ($elementfolders as $elementfolder) {
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// If it is not a directory or it is '.' or '..', skip it.
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if (!$elementfolder->isDir() || $elementfolder->isDot()) {
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continue;
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}
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// Check that the standard class file exists, if not we do
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// not want to display it as an option as it will not work.
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$foldername = $elementfolder->getFilename();
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$classfile = "$elementdir/$foldername/lib.php";
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if (file_exists($classfile)) {
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// Need to require this file in case if we choose to add this element.
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require_once($classfile);
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$component = "customcertelement_{$foldername}";
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$options[$foldername] = get_string('pluginname', $component);
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}
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}
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}
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core_collator::asort($options);
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return $options;
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}
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/**
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* Return the list of possible fonts to use.
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*/
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function customcert_get_fonts() {
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global $CFG;
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// Array to store the available fonts.
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$options = array();
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// Location of fonts in Moodle.
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$fontdir = "$CFG->dirroot/lib/tcpdf/fonts";
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// Check that the directory exists.
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if (file_exists($fontdir)) {
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// Get directory contents.
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$fonts = new DirectoryIterator($fontdir);
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// Loop through the font folder.
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foreach ($fonts as $font) {
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// If it is not a file, or either '.' or '..', or
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// the extension is not php, or we can not open file,
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// skip it.
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if (!$font->isFile() || $font->isDot() || ($font->getExtension() != 'php')) {
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continue;
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}
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// Set the name of the font to null, the include next should then set this
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// value, if it is not set then the file does not include the necessary data.
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$name = null;
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// Some files include a display name, the include next should then set this
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// value if it is present, if not then $name is used to create the display name.
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$displayname = null;
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// Some of the TCPDF files include files that are not present, so we have to
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// suppress warnings, this is the TCPDF libraries fault, grrr.
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@include("$fontdir/$font");
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// If no $name variable in file, skip it.
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if (is_null($name)) {
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continue;
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}
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// Remove the extension of the ".php" file that contains the font information.
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$filename = basename($font, ".php");
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// Check if there is no display name to use.
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if (is_null($displayname)) {
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// Format the font name, so "FontName-Style" becomes "Font Name - Style".
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$displayname = preg_replace("/([a-z])([A-Z])/", "$1 $2", $name);
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$displayname = preg_replace("/([a-zA-Z])-([a-zA-Z])/", "$1 - $2", $displayname);
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}
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$options[$filename] = $displayname;
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}
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ksort($options);
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}
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return $options;
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}
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/**
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* Return the list of possible font sizes to use.
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*/
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function customcert_get_font_sizes() {
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// Array to store the sizes.
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$sizes = array();
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for ($i = 1; $i <= 60; $i++) {
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$sizes[$i] = $i;
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}
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return $sizes;
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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 $data the customcert data
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*/
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function customcert_save_page_data($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('customcertid' => $data->id))) {
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// Loop through existing pages.
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foreach ($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_' . $page->id;
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// Create the page data to update the DB with.
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$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->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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* Returns an instance of the element class.
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*
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* @param stdClass $element the element
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* @return stdClass|bool returns the instance of the element class, or false if element
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* class does not exists.
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*/
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function customcert_get_element_instance($element) {
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global $CFG;
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$classfile = "$CFG->dirroot/mod/customcert/element/{$element->element}/lib.php";
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// Ensure this necessary file exists.
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if (file_exists($classfile)) {
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require_once($classfile);
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$classname = "customcert_element_{$element->element}";
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return new $classname($element);
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}
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return false;
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}
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/**
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* Handles adding another page to the customcert.
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*
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* @param stdClass $data the form data
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*/
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function customcert_add_page($data) {
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global $DB;
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// Set the page number to 1 to begin with.
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$pagenumber = 1;
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// Get the max page number.
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$sql = "SELECT MAX(pagenumber) as maxpage
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FROM {customcert_pages} cp
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WHERE cp.customcertid = :customcertid";
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if ($maxpage = $DB->get_record_sql($sql, array('customcertid' => $data->id))) {
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$pagenumber = $maxpage->maxpage + 1;
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}
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// Store time in a variable.
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$time = time();
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// New page creation.
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$page = new stdClass();
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$page->customcertid = $data->id;
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$page->width = '210';
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$page->height = '297';
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$page->pagenumber = $pagenumber;
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$page->timecreated = $time;
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$page->timemodified = $time;
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// Insert the page.
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$DB->insert_record('customcert_pages', $page);
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}
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/**
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* Handles deleting an element from the customcert.
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*
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* @param int $elementid the customcert page
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*/
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function customcert_delete_element($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 = customcert_get_element_instance($element)) {
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$e->delete_element();
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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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* Handles deleting a page from the customcert.
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*
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* @param int $pageid the customcert page
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*/
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function customcert_delete_page($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 = customcert_get_element_instance($element)) {
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$e->delete_element();
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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 pagenumber = pagenumber - 1
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WHERE customcertid = :customcertid
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AND pagenumber > :pagenumber";
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$DB->execute($sql, array('customcertid' => $page->customcertid, 'pagenumber' => $page->pagenumber));
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}
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/**
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* Returns a list of all the templates.
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*
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* @return bool returns true if success, false otherwise
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*/
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function customcert_get_templates() {
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global $DB;
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return $DB->get_records_menu('customcert_template', array(), 'name ASC', 'id, name');
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}
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/**
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* Get the time the user has spent in the course.
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*
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* @param int $courseid
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* @return int the total time spent in seconds
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*/
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function customcert_get_course_time($courseid) {
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global $CFG, $DB, $USER;
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$logmanager = get_log_manager();
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$readers = $logmanager->get_readers();
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$enabledreaders = get_config('tool_log', 'enabled_stores');
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$enabledreaders = explode(',', $enabledreaders);
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// Go through all the readers until we find one that we can use.
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foreach ($enabledreaders as $enabledreader) {
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$reader = $readers[$enabledreader];
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if ($reader instanceof \logstore_legacy\log\store) {
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$logtable = 'log';
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$coursefield = 'course';
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$timefield = 'time';
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break;
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} else if ($reader instanceof \core\log\sql_internal_reader) {
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$logtable = $reader->get_internal_log_table_name();
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$coursefield = 'courseid';
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$timefield = 'timecreated';
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break;
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}
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}
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// If we didn't find a reader then return 0.
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if (!isset($logtable)) {
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return 0;
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}
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$sql = "SELECT id, $timefield
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FROM {{$logtable}}
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WHERE userid = :userid
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AND $coursefield = :courseid
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ORDER BY $timefield ASC";
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$params = array('userid' => $USER->id, 'courseid' => $courseid);
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$totaltime = 0;
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if ($logs = $DB->get_recordset_sql($sql, $params)) {
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foreach ($logs as $log) {
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if (!isset($login)) {
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// For the first time $login is not set so the first log is also the first login
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$login = $log->$timefield;
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$lasthit = $log->$timefield;
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$totaltime = 0;
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}
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$delay = $log->$timefield - $lasthit;
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if ($delay > ($CFG->sessiontimeout * 60)) {
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// The difference between the last log and the current log is more than
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// the timeout Register session value so that we have found a session!
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$login = $log->$timefield;
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} else {
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$totaltime += $delay;
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}
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// Now the actual log became the previous log for the next cycle
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$lasthit = $log->$timefield;
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}
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return $totaltime;
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}
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return 0;
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}
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/**
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* Returns a list of issued customcerts.
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*
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* @param int $customcertid
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* @param bool $groupmode are we in group mode
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* @param stdClass $cm the course module
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* @param int $page offset
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* @param int $perpage total per page
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* @return stdClass the users
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*/
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function customcert_get_issues($customcertid, $groupmode, $cm, $page, $perpage) {
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global $DB;
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// Get the conditional SQL.
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list($conditionssql, $conditionsparams) = customcert_get_conditional_issues_sql($cm, $groupmode);
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// If it is empty then return an empty array.
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if (empty($conditionsparams)) {
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return array();
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}
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// Add the conditional SQL and the customcertid to form all used parameters.
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$allparams = $conditionsparams + array('customcertid' => $customcertid);
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// Return the issues.
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$sql = "SELECT u.*, ci.code, ci.timecreated
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FROM {user} u
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INNER JOIN {customcert_issues} ci
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ON u.id = ci.userid
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WHERE u.deleted = 0
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AND ci.customcertid = :customcertid
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$conditionssql
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ORDER BY " . $DB->sql_fullname();
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return $DB->get_records_sql($sql, $allparams, $page * $perpage, $perpage);
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}
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/**
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* Returns the total number of issues for a given customcert.
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*
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* @param int $customcertid
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* @param stdClass $cm the course module
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* @param bool $groupmode the group mode
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* @return int the number of issues
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*/
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function customcert_get_number_of_issues($customcertid, $cm, $groupmode) {
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global $DB;
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// Get the conditional SQL.
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list($conditionssql, $conditionsparams) = customcert_get_conditional_issues_sql($cm, $groupmode);
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// If it is empty then return 0.
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if (empty($conditionsparams)) {
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return 0;
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}
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// Add the conditional SQL and the customcertid to form all used parameters.
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$allparams = $conditionsparams + array('customcertid' => $customcertid);
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// Return the number of issues.
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$sql = "SELECT COUNT(u.id) as count
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FROM {user} u
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INNER JOIN {customcert_issues} ci
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ON u.id = ci.userid
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WHERE u.deleted = 0
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AND ci.customcertid = :customcertid
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$conditionssql";
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return $DB->count_records_sql($sql, $allparams);
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}
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/**
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* Returns an array of the conditional variables to use in the get_issues SQL query.
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*
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* @param stdClass $cm the course module
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* @param bool $groupmode are we in group mode ?
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* @return array the conditional variables
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*/
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function customcert_get_conditional_issues_sql($cm, $groupmode) {
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global $DB, $USER;
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// Get all users that can manage this customcert to exclude them from the report.
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$context = context_module::instance($cm->id);
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$conditionssql = '';
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$conditionsparams = array();
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// Get all users that can manage this certificate to exclude them from the report.
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$certmanagers = array_keys(get_users_by_capability($context, 'mod/certificate:manage', 'u.id'));
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$certmanagers = array_merge($certmanagers, array_keys(get_admins()));
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list($sql, $params) = $DB->get_in_or_equal($certmanagers, SQL_PARAMS_NAMED, 'cert');
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$conditionssql .= "AND NOT u.id $sql \n";
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$conditionsparams += $params;
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if ($groupmode) {
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$canaccessallgroups = has_capability('moodle/site:accessallgroups', $context);
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$currentgroup = groups_get_activity_group($cm);
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// If we are viewing all participants and the user does not have access to all groups then return nothing.
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if (!$currentgroup && !$canaccessallgroups) {
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return array('', array());
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}
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if ($currentgroup) {
|
|
if (!$canaccessallgroups) {
|
|
// Guest users do not belong to any groups.
|
|
if (isguestuser()) {
|
|
return array('', array());
|
|
}
|
|
|
|
// Check that the user belongs to the group we are viewing.
|
|
$usersgroups = groups_get_all_groups($cm->course, $USER->id, $cm->groupingid);
|
|
if ($usersgroups) {
|
|
if (!isset($usersgroups[$currentgroup])) {
|
|
return array('', array());
|
|
}
|
|
} else { // They belong to no group, so return an empty array.
|
|
return array('', array());
|
|
}
|
|
}
|
|
|
|
$groupusers = array_keys(groups_get_members($currentgroup, 'u.*'));
|
|
if (empty($groupusers)) {
|
|
return array('', array());
|
|
}
|
|
|
|
list($sql, $params) = $DB->get_in_or_equal($groupusers, SQL_PARAMS_NAMED, 'grp');
|
|
$conditionssql .= "AND u.id $sql ";
|
|
$conditionsparams += $params;
|
|
}
|
|
}
|
|
|
|
return array($conditionssql, $conditionsparams);
|
|
}
|
|
|
|
/**
|
|
* Generates a 10-digit code of random letters and numbers.
|
|
*
|
|
* @return string
|
|
*/
|
|
function customcert_generate_code() {
|
|
global $DB;
|
|
|
|
$uniquecodefound = false;
|
|
$code = random_string(10);
|
|
while (!$uniquecodefound) {
|
|
if (!$DB->record_exists('customcert_issues', array('code' => $code))) {
|
|
$uniquecodefound = true;
|
|
} else {
|
|
$code = random_string(10);
|
|
}
|
|
}
|
|
|
|
return $code;
|
|
}
|
|
|
|
/**
|
|
* Generate the grid PDF to show the layout of the PDF.
|
|
*
|
|
* @param int $pageid the customcert page
|
|
*/
|
|
function customcert_generate_grid_pdf($pageid) {
|
|
global $CFG, $DB;
|
|
|
|
require_once($CFG->libdir . '/pdflib.php');
|
|
|
|
// Get the page.
|
|
$page = $DB->get_record('customcert_pages', array('id' => $pageid), '*', MUST_EXIST);
|
|
|
|
// Set the PDF name.
|
|
$pdfname = get_string('gridpdfname', 'customcert', $page->id);
|
|
|
|
// Create the pdf object.
|
|
$pdf = new pdf();
|
|
$pdf->setPrintHeader(false);
|
|
$pdf->setPrintFooter(false);
|
|
$pdf->SetTitle($pdfname);
|
|
$pdf->SetMargins(0, 0);
|
|
$pdf->SetAutoPageBreak(true, 0);
|
|
|
|
// Add the page to the PDF.
|
|
if ($page->width > $page->height) {
|
|
$orientation = 'L';
|
|
} else {
|
|
$orientation = 'P';
|
|
}
|
|
$pdf->AddPage($orientation, array($page->width, $page->height));
|
|
|
|
// The cell width.
|
|
$cellwidth = 10;
|
|
$cellheight = 10;
|
|
|
|
// The increments we want to go up in.
|
|
$inc = 20;
|
|
$decpos = 4;
|
|
|
|
// Draw first lines before we increment from here.
|
|
$pdf->Line(($inc / 2) + 2, 0, ($inc / 2) + 2, $page->height);
|
|
$pdf->Line(0, ($inc / 2), $page->width, ($inc / 2));
|
|
|
|
// Now we want to start drawing the lines to make the grid.
|
|
// Draw the horizontal lines.
|
|
for ($h = $inc; $h <= $page->height; $h += $inc) {
|
|
// Dirty hack cause the printer keeps cutting off characters
|
|
// near the end of the page for some BS reason.
|
|
if (strlen($h) <= 2) {
|
|
$lmargin = 5;
|
|
} else {
|
|
$lmargin = 4;
|
|
}
|
|
// Write the distance we are at.
|
|
$pdf->writeHTMLCell($cellwidth, $cellheight, $lmargin, $h - $decpos, $h);
|
|
|
|
// Get the location we are going to draw the line and then draw it.
|
|
$hline = $h + ($inc / 2);
|
|
$pdf->Line(0, $hline, $page->width, $hline);
|
|
}
|
|
|
|
// Draw the vertical lines.
|
|
for ($w = $inc; $w <= $page->width; $w += $inc) {
|
|
// Write the distance we are at.
|
|
$pdf->writeHTMLCell($cellwidth, $cellheight, $w - $decpos, 3, $w);
|
|
|
|
// Get the location we are going to draw the line and then draw it.
|
|
$wline = $w + ($inc / 2);
|
|
$pdf->Line($wline, 0, $wline, $page->height);
|
|
}
|
|
|
|
$pdf->Output($pdfname . '.pdf', 'D');
|
|
exit();
|
|
}
|
|
|
|
/**
|
|
* Generate the PDF for the specified customcert and user.
|
|
*
|
|
* @param stdClass $customcert
|
|
* @param bool $preview true if it is a preview, false otherwise
|
|
*/
|
|
function customcert_generate_pdf($customcert, $preview = false) {
|
|
global $CFG, $DB;
|
|
|
|
require_once($CFG->libdir . '/pdflib.php');
|
|
|
|
// Get the pages for the customcert, there should always be at least one page for each customcert.
|
|
if ($pages = $DB->get_records('customcert_pages', array('customcertid' => $customcert->id), 'pagenumber ASC')) {
|
|
// Create the pdf object.
|
|
$pdf = new pdf();
|
|
if (!empty($customcert->protection)) {
|
|
$protection = explode(', ', $customcert->protection);
|
|
$pdf->SetProtection($protection);
|
|
}
|
|
$pdf->setPrintHeader(false);
|
|
$pdf->setPrintFooter(false);
|
|
$pdf->SetTitle($customcert->name);
|
|
$pdf->SetMargins(0, 0);
|
|
$pdf->SetAutoPageBreak(true, 0);
|
|
// Remove full-stop at the end, if it exists, to avoid "..pdf" being created and being filtered by clean_filename.
|
|
$filename = rtrim($customcert->name, '.');
|
|
$filename = clean_filename($filename . '.pdf');
|
|
// Loop through the pages and display their content.
|
|
foreach ($pages as $page) {
|
|
// Add the page to the PDF.
|
|
if ($page->width > $page->height) {
|
|
$orientation = 'L';
|
|
} else {
|
|
$orientation = 'P';
|
|
}
|
|
$pdf->AddPage($orientation, array($page->width, $page->height));
|
|
// Get the elements for the page.
|
|
if ($elements = $DB->get_records('customcert_elements', array('pageid' => $page->id), 'sequence ASC')) {
|
|
// Loop through and display.
|
|
foreach ($elements as $element) {
|
|
// Get an instance of the element class.
|
|
if ($e = customcert_get_element_instance($element)) {
|
|
$e->render($pdf, $preview);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$pdf->Output($filename, 'D');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Generate the report.
|
|
*
|
|
* @param stdClass $customcert
|
|
* @param stdClass $users the list of users who have had a customcert issued
|
|
* @param string $type
|
|
*/
|
|
function customcert_generate_report_file($customcert, $users, $type) {
|
|
global $CFG, $COURSE;
|
|
|
|
if ($type == 'ods') {
|
|
require_once($CFG->libdir . '/odslib.class.php');
|
|
$workbook = new MoodleODSWorkbook('-');
|
|
} else if ($type == 'xls') {
|
|
require_once($CFG->libdir . '/excellib.class.php');
|
|
$workbook = new MoodleExcelWorkbook('-');
|
|
}
|
|
|
|
$filename = clean_filename($COURSE->shortname . ' ' . rtrim($customcert->name, '.') . '.' . $type);
|
|
|
|
// Send HTTP headers.
|
|
$workbook->send($filename);
|
|
|
|
// Creating the first worksheet.
|
|
$myxls = $workbook->add_worksheet(get_string('report', 'customcert'));
|
|
|
|
// Print names of all the fields.
|
|
$myxls->write_string(0, 0, get_string('lastname'));
|
|
$myxls->write_string(0, 1, get_string('firstname'));
|
|
$myxls->write_string(0, 2, get_string('idnumber'));
|
|
$myxls->write_string(0, 3, get_string('group'));
|
|
$myxls->write_string(0, 4, get_string('receiveddate', 'customcert'));
|
|
$myxls->write_string(0, 5, get_string('code', 'customcert'));
|
|
|
|
// Generate the data for the body of the spreadsheet.
|
|
$row = 1;
|
|
if ($users) {
|
|
foreach ($users as $user) {
|
|
$myxls->write_string($row, 0, $user->lastname);
|
|
$myxls->write_string($row, 1, $user->firstname);
|
|
$studentid = (!empty($user->idnumber)) ? $user->idnumber : ' ';
|
|
$myxls->write_string($row, 2, $studentid);
|
|
$ug2 = '';
|
|
if ($usergrps = groups_get_all_groups($COURSE->id, $user->id)) {
|
|
foreach ($usergrps as $ug) {
|
|
$ug2 = $ug2 . $ug->name;
|
|
}
|
|
}
|
|
$myxls->write_string($row, 3, $ug2);
|
|
$myxls->write_string($row, 4, userdate($user->timecreated));
|
|
$myxls->write_string($row, 5, $user->code);
|
|
$row++;
|
|
}
|
|
}
|
|
// Close the workbook.
|
|
$workbook->close();
|
|
}
|