add file to download all certificates

Author: HobieCat

downloadcerts.php

@@ -0,0 +1,106 @@
+<?php
+// This file is part of the customcert module for Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Handles zip and download of certificates.
+ *
+ * Derived from the local_bulkcustomcert by Gonzalo Romero.
+ *
+ * @package    mod_customcert
+ * @author     Gonzalo Romero
+ * @author     Giorgio Consorti <[email protected]>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+// defined('MOODLE_INTERNAL') || die();
+
+require_once(__DIR__ . '/../../config.php');
+
+$courseid = optional_param('courseid', null, PARAM_INT);
+$customcertid = optional_param('customcertid', null, PARAM_INT);
+
+if (!has_capability('mod/customcert:viewallcertificates', context_system::instance()) && !$courseid && !$customcert) {
+    die();
+}
+
+global $DB;
+
+// Increase the server timeout to handle the creation and sending of large zip files.
+core_php_time_limit::raise();
+
+if ($courseid) {
+    $course = $DB->get_record('course', ['id' => $courseid]);
+    $certs = $DB->get_records('customcert', ['course' => $courseid]);
+} else if ($customcertid) {
+    $cert = $DB->get_record('customcert', ['id' => $customcertid], '*', MUST_EXIST);
+    $certs[$cert->id] = $cert;
+    $course = $DB->get_record('course', ['id' => $certs[$cert->id]->course], '*', MUST_EXIST);
+    $courseid = $course->id;
+    unset($cert);
+}
+
+$context = $DB->get_record('context', ['contextlevel' => '50', 'instanceid' => $courseid]);
+$users = $DB->get_records('role_assignments', ['contextid' => $context->id]);
+
+// Build a list of files to zip.
+$filesforzipping = [];
+
+foreach ($certs as $certid => $cert_fields) {
+    $template = null;
+    foreach ($users as $userid => $user_fields) {
+        if (!$DB->get_record('customcert_issues', ['userid' => $user_fields->userid, 'customcertid' => $certid])) {
+            continue;
+        }
+        if (is_null($template)) {
+            $template = $DB->get_record('customcert_templates', ['id' => $cert_fields->templateid], '*', MUST_EXIST);
+            $template = new \mod_customcert\template($template);
+        }
+        $lf = new \mod_customcert\localfile($template);
+        if (false === $file = $lf->getPDF($user_fields->userid)) {
+            // must generate the pdf
+            $pdf = $template->generate_pdf(false, $user_fields->userid, true);
+            if (!empty($pdf)) {
+                $file = $lf->getPDF($user_fields->userid);
+            }
+        }
+        if ($file) {
+            $filesforzipping['/' . $course->shortname . '/' . $cert_fields->name . '/' .$file->get_filename()] = $file;
+        }
+    }
+}
+
+if (count($filesforzipping) == 0) {
+    // This should never happen. The option only show up if there is available certs.
+    $url = new moodle_url('/course/view.php?id=' . $courseid);
+    redirect($url);
+} else if ($zipfile = pack_files($filesforzipping)) {
+    send_temp_file($zipfile, get_string('modulenameplural', 'customcert') . '-' . $course->shortname . '.zip');
+}
+die();
+
+
+function pack_files($filesforzipping)
+{
+    global $CFG;
+    // Create path for new zip file.
+    $tempzip = tempnam($CFG->tempdir . '/', 'customcert_');
+    // Zip files.
+    $zipper = new zip_packer();
+    if ($zipper->archive_to_pathname($filesforzipping, $tempzip)) {
+        return $tempzip;
+    }
+    return false;
+}