From 1ad4527c1d62dc6df02711d1c1e390f2a9169991 Mon Sep 17 00:00:00 2001
From: Valentin Popov <info@valentineus.link>
Date: Thu, 23 Nov 2017 17:17:08 +0400
Subject: External code of the library

---
 lib.php | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 lib.php

diff --git a/lib.php b/lib.php
new file mode 100644
index 0000000..6cffd1b
--- /dev/null
+++ b/lib.php
@@ -0,0 +1,122 @@
+<?php
+// This file is part of 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/>.
+
+/**
+ * Library code used by the service control interfaces.
+ *
+ * @package   local_webhooks
+ * @copyright 2017 "Valentin Popov" <info@valentineus.link>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined("MOODLE_INTERNAL") || die();
+
+/**
+ * Getting information about the service.
+ *
+ * @param  number $serviceid
+ * @return object
+ */
+function local_webhooks_get_record($serviceid = 0) {
+    global $DB;
+
+    $servicerecord = $DB->get_record("local_webhooks_service", array("id" => $serviceid), "*", MUST_EXIST);
+
+    if (!empty($servicerecord->events)) {
+        $servicerecord->events = local_webhooks_unarchive_data($servicerecord->events);
+    }
+
+    return $servicerecord;
+}
+
+/**
+ * Getting a list of all services.
+ *
+ * @param  number $limitfrom
+ * @param  number $limitnum
+ * @return array
+ */
+function local_webhooks_list_records($limitfrom = 0, $limitnum = 0) {
+    global $DB;
+
+    $listservices = $DB->get_records("local_webhooks_service", null, "id", "*", $limitfrom, $limitnum);
+
+    foreach ($listservices as $servicerecord) {
+        if (!empty($servicerecord->events)) {
+            $servicerecord->events = local_webhooks_unarchive_data($servicerecord->events);
+        }
+    }
+
+    return $listservices;
+}
+
+/**
+ * Delete the record.
+ *
+ * @param number $serviceid
+ */
+function local_webhooks_remove_record($serviceid = 0) {
+    global $DB;
+
+    $DB->delete_records("local_webhooks_service", array("id" => $serviceid));
+}
+
+/**
+ * Update the record in the database.
+ *
+ * @param  object  $data
+ * @param  boolean $insert
+ * @return boolean
+ */
+function local_webhooks_update_record($data, $insert = true) {
+    global $DB;
+
+    if (empty($data->events)) {
+        $data->events = array();
+    }
+
+    $data->events = local_webhooks_archiving_data($data->events);
+
+    if (boolval($insert)) {
+        $result = $DB->insert_record("local_webhooks_service", $data, true, false);
+    } else {
+        $result = $DB->update_record("local_webhooks_service", $data, false);
+    }
+
+    return boolval($result);
+}
+
+/**
+ * Compress an array into a string.
+ *
+ * @param  array  $data
+ * @return string
+ */
+function local_webhooks_archiving_data($data = array()) {
+    $result = base64_encode(gzcompress(serialize($data), 3));
+    return $result;
+}
+
+/**
+ * Gets an array from a compressed string.
+ *
+ * @param  string $data
+ * @return array
+ */
+function local_webhooks_unarchive_data($data = "") {
+    $result = unserialize(gzuncompress(base64_decode($data)));
+    return $result;
+}
\ No newline at end of file
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