Formatting code and eliminating possible errors

Signed-off-by: Valentin Popov <info@valentineus.link>

18 files changed, 378 insertions, 254 deletions

diff --git a/classes/event/backup_performed.php b/classes/event/backup_performed.php
index d9a5502..b1f7b7e 100644
--- a/classes/event/backup_performed.php
+++ b/classes/event/backup_performed.php
@@ -26,40 +26,50 @@ namespace local_webhooks\event;
 
 defined('MOODLE_INTERNAL') || die();
 
+use core\event\base;
+use lang_string;
+use moodle_url;
+
 /**
  * Defines how to work with events.
  *
  * @copyright 2017 "Valentin Popov" <info@valentineus.link>
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class backup_performed extends \core\event\base {
-    /**
-     * Init method.
-     */
-    protected function init() {
-        $this->data["crud"]        = "c";
-        $this->data["edulevel"]    = self::LEVEL_OTHER;
-        $this->data["objecttable"] = "local_webhooks_service";
-    }
-
+class backup_performed extends base {
     /**
      * Return localised event name.
+     *
+     * @throws \coding_exception
      */
     public static function get_name() {
-        return new \lang_string("create", "moodle");
+        return new lang_string('create', 'moodle');
     }
 
     /**
      * Returns description of what happened.
+     *
+     * @throws \coding_exception
      */
     public function get_description() {
-        return new \lang_string("backup", "moodle");
+        return new lang_string('backup', 'moodle');
     }
 
     /**
      * Get URL related to the action.
+     *
+     * @throws \moodle_exception
      */
     public function get_url() {
-        return new \moodle_url("/local/webhooks/index.php");
+        return new moodle_url('/local/webhooks/index.php');
+    }
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['crud'] = 'c';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+        $this->data['objecttable'] = 'local_webhooks_service';
     }
 }
\ No newline at end of file
diff --git a/classes/event/backup_restored.php b/classes/event/backup_restored.php
index 0b6b5f9..83c9ae6 100644
--- a/classes/event/backup_restored.php
+++ b/classes/event/backup_restored.php
@@ -26,40 +26,50 @@ namespace local_webhooks\event;
 
 defined('MOODLE_INTERNAL') || die();
 
+use core\event\base;
+use lang_string;
+use moodle_url;
+
 /**
  * Defines how to work with events.
  *
  * @copyright 2017 "Valentin Popov" <info@valentineus.link>
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class backup_restored extends \core\event\base {
-    /**
-     * Init method.
-     */
-    protected function init() {
-        $this->data["crud"]        = "u";
-        $this->data["edulevel"]    = self::LEVEL_OTHER;
-        $this->data["objecttable"] = "local_webhooks_service";
-    }
-
+class backup_restored extends base {
     /**
      * Return localised event name.
+     *
+     * @throws \coding_exception
      */
     public static function get_name() {
-        return new \lang_string("update", "moodle");
+        return new lang_string('update', 'moodle');
     }
 
     /**
      * Returns description of what happened.
+     *
+     * @throws \coding_exception
      */
     public function get_description() {
-        return new \lang_string("backupfinished", "moodle");
+        return new lang_string('backupfinished', 'moodle');
     }
 
     /**
      * Get URL related to the action.
+     *
+     * @throws \moodle_exception
      */
     public function get_url() {
-        return new \moodle_url("/local/webhooks/index.php");
+        return new moodle_url('/local/webhooks/index.php');
+    }
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['crud'] = 'u';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+        $this->data['objecttable'] = 'local_webhooks_service';
     }
 }
\ No newline at end of file
diff --git a/classes/event/response_answer.php b/classes/event/response_answer.php
index aa12845..95a3949 100644
--- a/classes/event/response_answer.php
+++ b/classes/event/response_answer.php
@@ -26,40 +26,48 @@ namespace local_webhooks\event;
 
 defined('MOODLE_INTERNAL') || die();
 
+use core\event\base;
+use lang_string;
+use moodle_url;
+
 /**
  * Defines how to work with events.
  *
  * @copyright 2017 "Valentin Popov" <info@valentineus.link>
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class response_answer extends \core\event\base {
-    /**
-     * Init method.
-     */
-    protected function init() {
-        $this->data["crud"]        = "r";
-        $this->data["edulevel"]    = self::LEVEL_OTHER;
-        $this->data["objecttable"] = "local_webhooks_service";
-    }
-
+class response_answer extends base {
     /**
      * Return localised event name.
+     *
+     * @throws \coding_exception
      */
     public static function get_name() {
-        return new \lang_string("answer", "moodle");
+        return new lang_string('answer', 'moodle');
     }
 
     /**
      * Returns description of what happened.
      */
     public function get_description() {
-        return $this->other["status"];
+        return $this->other['status'];
     }
 
     /**
      * Get URL related to the action.
+     *
+     * @throws \moodle_exception
      */
     public function get_url() {
-        return new \moodle_url("/local/webhooks/editservice.php", array("serviceid" => $this->objectid));
+        return new moodle_url('/local/webhooks/editservice.php', array('serviceid' => $this->objectid));
+    }
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['crud'] = 'r';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+        $this->data['objecttable'] = 'local_webhooks_service';
     }
 }
\ No newline at end of file
diff --git a/classes/event/service_added.php b/classes/event/service_added.php
index 0ec9780..89d7050 100644
--- a/classes/event/service_added.php
+++ b/classes/event/service_added.php
@@ -26,40 +26,50 @@ namespace local_webhooks\event;
 
 defined('MOODLE_INTERNAL') || die();
 
+use core\event\base;
+use lang_string;
+use moodle_url;
+
 /**
  * Defines how to work with events.
  *
  * @copyright 2017 "Valentin Popov" <info@valentineus.link>
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class service_added extends \core\event\base {
-    /**
-     * Init method.
-     */
-    protected function init() {
-        $this->data["crud"]        = "c";
-        $this->data["edulevel"]    = self::LEVEL_OTHER;
-        $this->data["objecttable"] = "local_webhooks_service";
-    }
-
+class service_added extends base {
     /**
      * Return localised event name.
+     *
+     * @throws \coding_exception
      */
     public static function get_name() {
-        return new \lang_string("create", "moodle");
+        return new lang_string('create', 'moodle');
     }
 
     /**
      * Returns description of what happened.
+     *
+     * @throws \coding_exception
      */
     public function get_description() {
-        return new \lang_string("eventwebserviceservicecreated", "webservice");
+        return new lang_string('eventwebserviceservicecreated', 'webservice');
     }
 
     /**
      * Get URL related to the action.
+     *
+     * @throws \moodle_exception
      */
     public function get_url() {
-        return new \moodle_url("/local/webhooks/editservice.php", array("serviceid" => $this->objectid));
+        return new moodle_url('/local/webhooks/editservice.php', array('serviceid' => $this->objectid));
+    }
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['crud'] = 'c';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+        $this->data['objecttable'] = 'local_webhooks_service';
     }
 }
\ No newline at end of file
diff --git a/classes/event/service_deleted.php b/classes/event/service_deleted.php
index 4955e55..0d446e7 100644
--- a/classes/event/service_deleted.php
+++ b/classes/event/service_deleted.php
@@ -26,40 +26,50 @@ namespace local_webhooks\event;
 
 defined('MOODLE_INTERNAL') || die();
 
+use core\event\base;
+use lang_string;
+use moodle_url;
+
 /**
  * Defines how to work with events.
  *
  * @copyright 2017 "Valentin Popov" <info@valentineus.link>
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class service_deleted extends \core\event\base {
-    /**
-     * Init method.
-     */
-    protected function init() {
-        $this->data["crud"]        = "d";
-        $this->data["edulevel"]    = self::LEVEL_OTHER;
-        $this->data["objecttable"] = "local_webhooks_service";
-    }
-
+class service_deleted extends base {
     /**
      * Return localised event name.
+     *
+     * @throws \coding_exception
      */
     public static function get_name() {
-        return new \lang_string("deleted", "moodle");
+        return new lang_string('deleted', 'moodle');
     }
 
     /**
      * Returns description of what happened.
+     *
+     * @throws \coding_exception
      */
     public function get_description() {
-        return new \lang_string("eventwebserviceservicedeleted", "webservice");
+        return new lang_string('eventwebserviceservicedeleted', 'webservice');
     }
 
     /**
      * Get URL related to the action.
+     *
+     * @throws \moodle_exception
      */
     public function get_url() {
-        return new \moodle_url("/local/webhooks/index.php");
+        return new moodle_url('/local/webhooks/index.php');
+    }
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['crud'] = 'd';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+        $this->data['objecttable'] = 'local_webhooks_service';
     }
 }
\ No newline at end of file
diff --git a/classes/event/service_updated.php b/classes/event/service_updated.php
index 2410d8a..08b7225 100644
--- a/classes/event/service_updated.php
+++ b/classes/event/service_updated.php
@@ -26,40 +26,50 @@ namespace local_webhooks\event;
 
 defined('MOODLE_INTERNAL') || die();
 
+use core\event\base;
+use lang_string;
+use moodle_url;
+
 /**
  * Defines how to work with events.
  *
  * @copyright 2017 "Valentin Popov" <info@valentineus.link>
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class service_updated extends \core\event\base {
-    /**
-     * Init method.
-     */
-    protected function init() {
-        $this->data["crud"]        = "u";
-        $this->data["edulevel"]    = self::LEVEL_OTHER;
-        $this->data["objecttable"] = "local_webhooks_service";
-    }
-
+class service_updated extends base {
     /**
      * Return localised event name.
+     *
+     * @throws \coding_exception
      */
     public static function get_name() {
-        return new \lang_string("update", "moodle");
+        return new lang_string('update', 'moodle');
     }
 
     /**
      * Returns description of what happened.
+     *
+     * @throws \coding_exception
      */
     public function get_description() {
-        return new \lang_string("eventwebserviceserviceupdated", "webservice");
+        return new lang_string('eventwebserviceserviceupdated', 'webservice');
     }
 
     /**
      * Get URL related to the action.
+     *
+     * @throws \moodle_exception
      */
     public function get_url() {
-        return new \moodle_url("/local/webhooks/editservice.php", array("serviceid" => $this->objectid));
+        return new moodle_url('/local/webhooks/editservice.php', array('serviceid' => $this->objectid));
+    }
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['crud'] = 'u';
+        $this->data['edulevel'] = self::LEVEL_OTHER;
+        $this->data['objecttable'] = 'local_webhooks_service';
     }
 }
\ No newline at end of file
diff --git a/classes/handler.php b/classes/handler.php
index 2381173..47a44f3 100644
--- a/classes/handler.php
+++ b/classes/handler.php
@@ -26,10 +26,15 @@ namespace local_webhooks;
 
 defined('MOODLE_INTERNAL') || die();
 
-require_once(__DIR__ . "/../lib.php");
-require_once(__DIR__ . "/../locallib.php");
+global $CFG;
 
-require_once($CFG->libdir . "/filelib.php");
+require_once(__DIR__ . '/../lib.php');
+require_once(__DIR__ . '/../locallib.php');
+
+require_once($CFG->libdir . '/filelib.php');
+
+use curl;
+use local_webhooks_events;
 
 /**
  * Defines how to work with events.
@@ -42,6 +47,9 @@ class handler {
      * External handler.
      *
      * @param object $event
+     *
+     * @throws \dml_exception
+     * @throws \coding_exception
      */
     public static function events($event) {
         $data = $event->get_data();
@@ -58,20 +66,21 @@ class handler {
      *
      * @param array  $data
      * @param object $callback
+     *
+     * @throws \coding_exception
+     * @throws \dml_exception
      */
     private static function handler_callback($data, $callback) {
         global $CFG;
 
-        if (boolval($callback->enable)) {
-            if (!empty($callback->events[$data["eventname"]])) {
-                $urlparse = parse_url($CFG->wwwroot);
+        if ((bool) $callback->enable && !empty($callback->events[$data['eventname']])) {
+            $urlparse = parse_url($CFG->wwwroot);
 
-                $data["host"] = $urlparse['host'];
-                $data["token"] = $callback->token;
-                $data["extra"] = $callback->other;
+            $data['host'] = $urlparse['host'];
+            $data['token'] = $callback->token;
+            $data['extra'] = $callback->other;
 
-                self::send($data, $callback);
-            }
+            self::send($data, $callback);
         }
     }
 
@@ -80,14 +89,19 @@ class handler {
      *
      * @param array  $data
      * @param object $callback
+     *
+     * @return array
+     * @throws \coding_exception
+     * @throws \dml_exception
      */
     private static function send($data, $callback) {
-        $curl = new \curl();
-        $curl->setHeader(array("Content-Type: application/" . $callback->type));
+        $curl = new curl();
+        $curl->setHeader(array('Content-Type: application/' . $callback->type));
         $curl->post($callback->url, json_encode($data));
 
         $response = $curl->getResponse();
-        \local_webhooks_events::response_answer($callback->id, $response);
+        local_webhooks_events::response_answer($callback->id, $response);
+
         return $response;
     }
 }
\ No newline at end of file
diff --git a/classes/service_form.php b/classes/service_form.php
index 3348247..eac7bb7 100644
--- a/classes/service_form.php
+++ b/classes/service_form.php
@@ -24,7 +24,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-require_once($CFG->libdir . "/formslib.php");
+require_once($CFG->libdir . '/formslib.php');
 
 /**
  * Description editing form definition.
@@ -42,63 +42,65 @@ class service_edit_form extends moodleform {
 
     /**
      * Defines the standard structure of the form.
+     *
+     * @throws \coding_exception
      */
     protected function definition() {
         $mform =& $this->_form;
-        $size  = array("size" => 60);
+        $size = array('size' => 60);
 
         /* Form heading */
-        $mform->addElement("header", "editserviceheader", new lang_string("service", "webservice"));
+        $mform->addElement('header', 'editserviceheader', new lang_string('service', 'webservice'));
 
         /* Name of the service */
-        $mform->addElement("text", "title", new lang_string("name", "moodle"), $size);
-        $mform->addRule("title", null, "required");
-        $mform->setType("title", PARAM_NOTAGS);
+        $mform->addElement('text', 'title', new lang_string('name', 'moodle'), $size);
+        $mform->addRule('title', null, 'required');
+        $mform->setType('title', PARAM_NOTAGS);
 
         /* Callback address */
-        $mform->addElement("text", "url", new lang_string("url", "moodle"), $size);
-        $mform->addRule("url", null, "required");
-        $mform->setType("url", PARAM_URL);
+        $mform->addElement('text', 'url', new lang_string('url', 'moodle'), $size);
+        $mform->addRule('url', null, 'required');
+        $mform->setType('url', PARAM_URL);
 
         /* Enabling the service */
-        $mform->addElement("advcheckbox", "enable", new lang_string("enable", "moodle"));
-        $mform->setType("enable", PARAM_BOOL);
-        $mform->setDefault("enable", 1);
-        $mform->setAdvanced("enable");
+        $mform->addElement('advcheckbox', 'enable', new lang_string('enable', 'moodle'));
+        $mform->setType('enable', PARAM_BOOL);
+        $mform->setDefault('enable', 1);
+        $mform->setAdvanced('enable');
 
         /* Token */
-        $mform->addElement("text", "token", new lang_string("token", "webservice"), $size);
-        $mform->setType("token", PARAM_NOTAGS);
+        $mform->addElement('text', 'token', new lang_string('token', 'webservice'), $size);
+        $mform->setType('token', PARAM_NOTAGS);
 
         /* Additional information */
-        $mform->addElement("text", "other", new lang_string("sourceext", "plugin"), $size);
-        $mform->setType("other", PARAM_NOTAGS);
-        $mform->setAdvanced("other");
+        $mform->addElement('text', 'other', new lang_string('sourceext', 'plugin'), $size);
+        $mform->setType('other', PARAM_NOTAGS);
+        $mform->setAdvanced('other');
 
         /* Content type */
-        $contenttype = array("json" => "application/json", "x-www-form-urlencoded" => "application/x-www-form-urlencoded");
-        $mform->addElement("select", "type", "Content type", $contenttype);
-        $mform->setAdvanced("type");
+        $contenttype = array('json' => 'application/json', 'x-www-form-urlencoded' => 'application/x-www-form-urlencoded');
+        $mform->addElement('select', 'type', 'Content type', $contenttype);
+        $mform->setAdvanced('type');
 
         /* Form heading */
-        $mform->addElement("header", "editserviceheaderevent", new lang_string("edulevel", "moodle"));
+        $mform->addElement('header', 'editserviceheaderevent', new lang_string('edulevel', 'moodle'));
 
         /* List of events */
-        $eventlist = report_eventlist_list_generator::get_all_events_list(true);
-        $events    = array();
+        $eventlist = report_eventlist_list_generator::get_all_events_list();
+        $events = array();
 
         /* Formation of the list of elements */
         foreach ($eventlist as $event) {
-            $events[$event["component"]][] =& $mform->createElement("checkbox", $event["eventname"], $event["eventname"]);
+            $events[$event['component']][] =& $mform->createElement('checkbox', $event['eventname'], $event['eventname']);
         }
 
         /* Displays groups of items */
         foreach ($events as $key => $event) {
-            $mform->addGroup($event, "events", $key, "<br />", true);
+            $mform->addGroup($event, 'events', $key, '<br />');
         }
 
         /* Control Panel */
-        $this->add_action_buttons(true);
+        $this->add_action_buttons();
     }
 }
 
@@ -118,18 +120,20 @@ class service_backup_form extends moodleform {
 
     /**
      * Defines the standard structure of the form.
+     *
+     * @throws \coding_exception
      */
     protected function definition() {
         $mform =& $this->_form;
 
         /* Form heading */
-        $mform->addElement("header", "editserviceheader", new lang_string("restore", "moodle"));
+        $mform->addElement('header', 'editserviceheader', new lang_string('restore', 'moodle'));
 
         /* Download the file */
-        $mform->addElement("filepicker", "backupfile", new lang_string("file", "moodle"));
-        $mform->addRule("backupfile", null, "required");
+        $mform->addElement('filepicker', 'backupfile', new lang_string('file', 'moodle'));
+        $mform->addRule('backupfile', null, 'required');
 
         /* Control Panel */
-        $this->add_action_buttons(true, new lang_string("restore", "moodle"));
+        $this->add_action_buttons(true, new lang_string('restore', 'moodle'));
     }
 }
\ No newline at end of file
diff --git a/db/events.php b/db/events.php
index f5dd77c..7f2733a 100644
--- a/db/events.php
+++ b/db/events.php
@@ -26,10 +26,10 @@ defined('MOODLE_INTERNAL') || die();
 
 $observers = array(
     array(
-        "callback"    => "\local_webhooks\\handler::events",
-        "eventname"   => "*",
-        "includefile" => null,
-        "internal"    => true,
-        "priority"    => 200
-    )
+        'callback'    => '\local_webhooks\handler::events',
+        'eventname'   => '*',
+        'includefile' => null,
+        'internal'    => true,
+        'priority'    => 200,
+    ),
 );
\ No newline at end of file
diff --git a/db/install.xml b/db/install.xml
index eff9631..ed5d6b1 100644
--- a/db/install.xml
+++ b/db/install.xml
@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
-<XMLDB PATH="local/webhooks/db" VERSION="2018061900" COMMENT="XMLDB file for Moodle" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../lib/xmldb/xmldb.xsd">
+<XMLDB PATH="local/webhooks/db" VERSION="2018061900" COMMENT="XMLDB file for Moodle"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:noNamespaceSchemaLocation="../../../lib/xmldb/xmldb.xsd">
     <TABLES>
         <TABLE NAME="local_webhooks_service" COMMENT="A table for storing callback services.">
             <FIELDS>
diff --git a/editservice.php b/editservice.php
index 8a7d4f6..821e0cc 100644
--- a/editservice.php
+++ b/editservice.php
@@ -22,22 +22,22 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-require_once(__DIR__ . "/../../config.php");
-require_once(__DIR__ . "/classes/service_form.php");
-require_once(__DIR__ . "/lib.php");
+require_once(__DIR__ . '/../../config.php');
+require_once(__DIR__ . '/classes/service_form.php');
+require_once(__DIR__ . '/lib.php');
 
-require_once($CFG->libdir . "/adminlib.php");
+require_once($CFG->libdir . '/adminlib.php');
 
 /* Optional parameters */
-$serviceid = optional_param("serviceid", 0, PARAM_INT);
+$serviceid = optional_param('serviceid', 0, PARAM_INT);
 
 /* Link generation */
-$urlparameters  = array("serviceid" => $serviceid);
-$baseurl        = new moodle_url("/local/webhooks/editservice.php", $urlparameters);
-$managerservice = new moodle_url("/local/webhooks/index.php");
+$urlparameters = array('serviceid' => $serviceid);
+$baseurl = new moodle_url('/local/webhooks/editservice.php', $urlparameters);
+$managerservice = new moodle_url('/local/webhooks/index.php');
 
 /* Configure the context of the page */
-admin_externalpage_setup("local_webhooks", "", null, $baseurl, array());
+admin_externalpage_setup('local_webhooks', '', null, $baseurl);
 $context = context_system::instance();
 
 /* Create an editing form */
@@ -50,7 +50,7 @@ if ($mform->is_cancelled()) {
 
 /* Getting the data */
 $servicerecord = new stdClass();
-if ($editing = boolval($serviceid)) {
+if ($editing = (bool) $serviceid) {
     $servicerecord = local_webhooks_get_record($serviceid);
     $mform->set_data($servicerecord);
 }
@@ -60,15 +60,15 @@ if ($data = $mform->get_data()) {
     if ($editing) {
         $data->id = $serviceid;
         local_webhooks_update_record($data, false);
-        redirect($managerservice, new lang_string("eventwebserviceserviceupdated", "webservice"));
+        redirect($managerservice, new lang_string('eventwebserviceserviceupdated', 'webservice'));
     } else {
-        local_webhooks_update_record($data, true);
-        redirect($managerservice, new lang_string("eventwebserviceservicecreated", "webservice"));
+        local_webhooks_update_record($data);
+        redirect($managerservice, new lang_string('eventwebserviceservicecreated', 'webservice'));
     }
 }
 
 /* The page title */
-$titlepage = new lang_string("externalservice", "webservice");
+$titlepage = new lang_string('externalservice', 'webservice');
 $PAGE->navbar->add($titlepage);
 $PAGE->set_heading($titlepage);
 $PAGE->set_title($titlepage);
diff --git a/index.php b/index.php
index 318520a..5de2101 100644
--- a/index.php
+++ b/index.php
@@ -22,93 +22,107 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-require_once(__DIR__ . "/../../config.php");
-require_once(__DIR__ . "/lib.php");
+require_once(__DIR__ . '/../../config.php');
+require_once(__DIR__ . '/lib.php');
 
-require_once($CFG->libdir . "/adminlib.php");
-require_once($CFG->libdir . "/tablelib.php");
+require_once($CFG->libdir . '/adminlib.php');
+require_once($CFG->libdir . '/tablelib.php');
 
 /* Optional parameters */
-$backupservices = optional_param("getbackup", 0, PARAM_BOOL);
-$deleteid       = optional_param("deleteid", 0, PARAM_INT);
-$hideshowid     = optional_param("hideshowid", 0, PARAM_INT);
+$backupservices = optional_param('getbackup', 0, PARAM_BOOL);
+$deleteid = optional_param('deleteid', 0, PARAM_INT);
+$hideshowid = optional_param('hideshowid', 0, PARAM_INT);
 
 /* Link generation */
-$editservice    = "/local/webhooks/editservice.php";
-$managerservice = "/local/webhooks/index.php";
-$restorebackup  = "/local/webhooks/restorebackup.php";
-$baseurl        = new moodle_url($managerservice);
+$editservice = '/local/webhooks/editservice.php';
+$managerservice = '/local/webhooks/index.php';
+$restorebackup = '/local/webhooks/restorebackup.php';
+$baseurl = new moodle_url($managerservice);
 
 /* Configure the context of the page */
-admin_externalpage_setup("local_webhooks", "", null, $baseurl, array());
+admin_externalpage_setup('local_webhooks', '', null, $baseurl);
 $context = context_system::instance();
 
 /* Delete the service */
-if (boolval($deleteid)) {
+if ((bool) $deleteid) {
     local_webhooks_remove_record($deleteid);
-    redirect($PAGE->url, new lang_string("eventwebserviceservicedeleted", "webservice"));
+    redirect($PAGE->url, new lang_string('eventwebserviceservicedeleted', 'webservice'));
 }
 
 /* Retrieving a list of services */
 $callbacks = local_webhooks_get_list_records();
 
 /* Upload settings as a file */
-if (boolval($backupservices)) {
+if ((bool) $backupservices) {
     $filecontent = local_webhooks_create_backup();
-    $filename    = "webhooks_" . date("U") . ".backup";
+    $filename = 'webhooks_' . date('U') . '.backup';
     send_file($filecontent, $filename, 0, 0, true, true);
 }
 
 /* Switching the status of the service */
-if (boolval($hideshowid)) {
+if ((bool) $hideshowid) {
     $callback = $callbacks[$hideshowid];
 
     if (!empty($callback)) {
-        $callback->enable = !boolval($callback->enable);
+        $callback->enable = !(bool) $callback->enable;
         local_webhooks_update_record($callback, false);
-        redirect($PAGE->url, new lang_string("eventwebserviceserviceupdated", "webservice"));
+        redirect($PAGE->url, new lang_string('eventwebserviceserviceupdated', 'webservice'));
     }
 }
 
 /* The page title */
-$titlepage = new lang_string("pluginname", "local_webhooks");
+$titlepage = new lang_string('pluginname', 'local_webhooks');
 $PAGE->set_heading($titlepage);
 $PAGE->set_title($titlepage);
 echo $OUTPUT->header();
 
 /* Table declaration */
-$table = new flexible_table("webhooks-service-table");
+$table = new flexible_table('webhooks-service-table');
 
 /* Customize the table */
-$table->define_columns(array("title", "url", "actions"));
-$table->define_headers(array(new lang_string("name", "moodle"), new lang_string("url", "moodle"), new lang_string("actions", "moodle")));
+$table->define_columns(
+    array(
+        'title',
+        'url',
+        'actions',
+    )
+);
+
+$table->define_headers(
+    array(
+        new lang_string('name', 'moodle'),
+        new lang_string('url', 'moodle'),
+        new lang_string('actions', 'moodle'),
+    )
+);
+
 $table->define_baseurl($baseurl);
 $table->setup();
 
 foreach ($callbacks as $callback) {
     /* Filling of information columns */
-    $titlecallback = html_writer::div($callback->title, "title");
-    $urlcallback   = html_writer::div($callback->url, "url");
+    $titlecallback = html_writer::div($callback->title, 'title');
+    $urlcallback = html_writer::div($callback->url, 'url');
 
     /* Defining service status */
-    $hideshowicon   = "t/show";
-    $hideshowstring = new lang_string("enable", "moodle");
-    if (boolval($callback->enable)) {
-        $hideshowicon   = "t/hide";
-        $hideshowstring = new lang_string("disable", "moodle");
+    $hideshowicon = 't/show';
+    $hideshowstring = new lang_string('enable', 'moodle');
+    if ((bool) $callback->enable) {
+        $hideshowicon = 't/hide';
+        $hideshowstring = new lang_string('disable', 'moodle');
     }
 
     /* Link to enable / disable the service */
-    $hideshowlink = new moodle_url($managerservice, array("hideshowid" => $callback->id));
+    $hideshowlink = new moodle_url($managerservice, array('hideshowid' => $callback->id));
     $hideshowitem = $OUTPUT->action_icon($hideshowlink, new pix_icon($hideshowicon, $hideshowstring));
 
     /* Link for editing */
-    $editlink = new moodle_url($editservice, array("serviceid" => $callback->id));
-    $edititem = $OUTPUT->action_icon($editlink, new pix_icon("t/edit", new lang_string("edit", "moodle")));
+    $editlink = new moodle_url($editservice, array('serviceid' => $callback->id));
+    $edititem = $OUTPUT->action_icon($editlink, new pix_icon('t/edit', new lang_string('edit', 'moodle')));
 
     /* Link to remove */
-    $deletelink = new moodle_url($managerservice, array("deleteid" => $callback->id));
-    $deleteitem = $OUTPUT->action_icon($deletelink, new pix_icon("t/delete", new lang_string("delete", "moodle")));
+    $deletelink = new moodle_url($managerservice, array('deleteid' => $callback->id));
+    $deleteitem = $OUTPUT->action_icon($deletelink, new pix_icon('t/delete', new lang_string('delete', 'moodle')));
 
     /* Adding data to the table */
     $table->add_data(array($titlecallback, $urlcallback, $hideshowitem . $edititem . $deleteitem));
@@ -119,14 +133,14 @@ $table->print_html();
 
 /* Add service button */
 $addserviceurl = new moodle_url($editservice);
-echo $OUTPUT->single_button($addserviceurl, new lang_string("addaservice", "webservice"), "get");
+echo $OUTPUT->single_button($addserviceurl, new lang_string('addaservice', 'webservice'), 'get');
 
 /* Button to get a backup */
-$backupurl = new moodle_url($managerservice, array("getbackup" => true));
-echo $OUTPUT->single_button($backupurl, new lang_string("backup", "moodle"), "get");
+$backupurl = new moodle_url($managerservice, array('getbackup' => true));
+echo $OUTPUT->single_button($backupurl, new lang_string('backup', 'moodle'), 'get');
 
 /* Button for restoring settings */
 $restorebackupurl = new moodle_url($restorebackup);
-echo $OUTPUT->single_button($restorebackupurl, new lang_string("restore", "moodle"), "get");
+echo $OUTPUT->single_button($restorebackupurl, new lang_string('restore', 'moodle'), 'get');
 
 echo $OUTPUT->footer();
\ No newline at end of file
diff --git a/lang/en/local_webhooks.php b/lang/en/local_webhooks.php
index d945f65..d0ae0fa 100644
--- a/lang/en/local_webhooks.php
+++ b/lang/en/local_webhooks.php
@@ -22,4 +22,4 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-$string["pluginname"] = "WebHooks";
\ No newline at end of file
+$string['pluginname'] = 'WebHooks';
\ No newline at end of file
diff --git a/lib.php b/lib.php
index be88deb..1cf993f 100644
--- a/lib.php
+++ b/lib.php
@@ -24,19 +24,21 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-require_once(__DIR__ . "/locallib.php");
+require_once(__DIR__ . '/locallib.php');
 
 /**
  * Getting a list of all services.
  *
- * @param  number $limitfrom
- * @param  number $limitnum
+ * @param int $limitfrom
+ * @param int $limitnum
+ *
  * @return array
+ * @throws \dml_exception
  */
 function local_webhooks_get_list_records($limitfrom = 0, $limitnum = 0) {
     global $DB;
 
-    $listservices = $DB->get_records("local_webhooks_service", null, "id", "*", $limitfrom, $limitnum);
+    $listservices = $DB->get_records('local_webhooks_service', null, 'id', '*', $limitfrom, $limitnum);
 
     foreach ($listservices as $servicerecord) {
         if (!empty($servicerecord->events)) {
@@ -50,13 +52,15 @@ function local_webhooks_get_list_records($limitfrom = 0, $limitnum = 0) {
 /**
  * Getting information about the service.
  *
- * @param  number $serviceid
+ * @param int $serviceid
+ *
  * @return object
+ * @throws \dml_exception
  */
 function local_webhooks_get_record($serviceid = 0) {
     global $DB;
 
-    $servicerecord = $DB->get_record("local_webhooks_service", array("id" => $serviceid), "*", MUST_EXIST);
+    $servicerecord = $DB->get_record('local_webhooks_service', array('id' => $serviceid), '*', MUST_EXIST);
 
     if (!empty($servicerecord->events)) {
         $servicerecord->events = local_webhooks_unarchive_data($servicerecord->events);
@@ -67,22 +71,27 @@ function local_webhooks_get_record($serviceid = 0) {
 
 /**
  * Clear the database table.
+ *
+ * @throws \dml_exception
  */
 function local_webhooks_remove_list_records() {
     global $DB;
 
-    $DB->delete_records("local_webhooks_service", null);
+    $DB->delete_records('local_webhooks_service');
 }
 
 /**
  * Delete the record.
  *
- * @param number $serviceid
+ * @param int $serviceid
+ *
+ * @throws \dml_exception
+ * @throws \coding_exception
  */
 function local_webhooks_remove_record($serviceid = 0) {
     global $DB;
 
-    $DB->delete_records("local_webhooks_service", array("id" => $serviceid));
+    $DB->delete_records('local_webhooks_service', array('id' => $serviceid));
     local_webhooks_events::service_deleted($serviceid);
 }
 
@@ -91,7 +100,10 @@ function local_webhooks_remove_record($serviceid = 0) {
  *
  * @param  object  $data
  * @param  boolean $insert
+ *
  * @return boolean
+ * @throws \dml_exception
+ * @throws \coding_exception
  */
 function local_webhooks_update_record($data, $insert = true) {
     global $DB;
@@ -102,41 +114,47 @@ function local_webhooks_update_record($data, $insert = true) {
 
     $data->events = local_webhooks_archiving_data($data->events);
 
-    if (boolval($insert)) {
-        $result = $DB->insert_record("local_webhooks_service", $data, true, false);
+    if ((bool) $insert) {
+        $result = $DB->insert_record('local_webhooks_service', $data);
         local_webhooks_events::service_added($result);
     } else {
-        $result = $DB->update_record("local_webhooks_service", $data, false);
+        $result = $DB->update_record('local_webhooks_service', $data);
         local_webhooks_events::service_updated($data->id);
     }
 
-    return boolval($result);
+    return (bool) $result;
 }
 
 /**
  * Make a backup copy of all the services.
  *
  * @return string
+ * @throws \dml_exception
+ * @throws \coding_exception
  */
 function local_webhooks_create_backup() {
     $listservices = local_webhooks_get_list_records();
     $listservices = local_webhooks_archiving_data($listservices);
     local_webhooks_events::backup_performed();
+
     return $listservices;
 }
 
 /**
  * Restore the data from the backup.
  *
- * @param string $data
+ * @param string $listservices
+ *
+ * @throws \dml_exception
+ * @throws \coding_exception
  */
-function local_webhooks_restore_backup($listservices = "") {
+function local_webhooks_restore_backup($listservices = '') {
     $listservices = local_webhooks_unarchive_data($listservices);
 
     local_webhooks_remove_list_records();
 
     foreach ($listservices as $servicerecord) {
-        local_webhooks_update_record($servicerecord, true);
+        local_webhooks_update_record($servicerecord);
     }
 
     local_webhooks_events::backup_restored();
@@ -145,21 +163,21 @@ function local_webhooks_restore_backup($listservices = "") {
 /**
  * Compress an array into a string.
  *
- * @param  array  $data
+ * @param  array $data
+ *
  * @return string
  */
-function local_webhooks_archiving_data($data = array()) {
-    $result = base64_encode(gzcompress(serialize($data), 3));
-    return $result;
+function local_webhooks_archiving_data(array $data = array()) {
+    return base64_encode(gzcompress(serialize($data), 3));
 }
 
 /**
  * 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 $result;
+function local_webhooks_unarchive_data($data = '') {
+    return unserialize(gzuncompress(base64_decode($data)));
 }
\ No newline at end of file
diff --git a/locallib.php b/locallib.php
index ede8e9a..39fb00d 100644
--- a/locallib.php
+++ b/locallib.php
@@ -33,14 +33,17 @@ defined('MOODLE_INTERNAL') || die();
 class local_webhooks_events {
     /**
      * Call the event when creating a backup.
+     *
+     * @throws \coding_exception
+     * @throws \dml_exception
      */
     public static function backup_performed() {
         $context = context_system::instance();
 
         $event = local_webhooks\event\backup_performed::create(
             array(
-                "context"  => $context,
-                "objectid" => 0
+                'context'  => $context,
+                'objectid' => 0,
             )
         );
 
@@ -49,14 +52,17 @@ class local_webhooks_events {
 
     /**
      * Call the event when restoring from a backup.
+     *
+     * @throws \coding_exception
+     * @throws \dml_exception
      */
     public static function backup_restored() {
         $context = context_system::instance();
 
         $event = local_webhooks\event\backup_restored::create(
             array(
-                "context"  => $context,
-                "objectid" => 0
+                'context'  => $context,
+                'objectid' => 0,
             )
         );
 
@@ -66,22 +72,25 @@ class local_webhooks_events {
     /**
      * Call event when the response is received from the service
      *
-     * @param number $objectid Service ID
-     * @param array  $response Server response
+     * @param int   $objectid Service ID
+     * @param array $response Server response
+     *
+     * @throws \coding_exception
+     * @throws \dml_exception
      */
-    public static function response_answer($objectid = 0, $response = array()) {
+    public static function response_answer($objectid = 0, array $response = array()) {
         $context = context_system::instance();
 
-        $status = "Error sending request";
-        if (!empty($response["HTTP/1.1"])) {
-            $status = $response["HTTP/1.1"];
+        $status = 'Error sending request';
+        if (!empty($response['HTTP/1.1'])) {
+            $status = $response['HTTP/1.1'];
         }
 
         $event = local_webhooks\event\response_answer::create(
             array(
-                "context"  => $context,
-                "objectid" => $objectid,
-                "other"    => array("status" => $status)
+                'context'  => $context,
+                'objectid' => $objectid,
+                'other'    => array('status' => $status),
             )
         );
 
@@ -91,16 +100,16 @@ class local_webhooks_events {
     /**
      * Call the event when the service is added.
      *
-     * @param number $objectid Service ID
+     * @param int $objectid Service ID
+     *
+     * @throws \coding_exception
+     * @throws \dml_exception
      */
     public static function service_added($objectid = 0) {
         $context = context_system::instance();
 
         $event = local_webhooks\event\service_added::create(
-            array(
-                "context"  => $context,
-                "objectid" => $objectid
-            )
+            compact('context', 'objectid')
         );
 
         $event->trigger();
@@ -109,16 +118,16 @@ class local_webhooks_events {
     /**
      * Call the event when the service is deleted.
      *
-     * @param number $objectid Service ID
+     * @param int $objectid Service ID
+     *
+     * @throws \coding_exception
+     * @throws \dml_exception
      */
     public static function service_deleted($objectid = 0) {
         $context = context_system::instance();
 
         $event = local_webhooks\event\service_deleted::create(
-            array(
-                "context"  => $context,
-                "objectid" => $objectid
-            )
+            compact('context', 'objectid')
         );
 
         $event->trigger();
@@ -127,16 +136,16 @@ class local_webhooks_events {
     /**
      * Call event when the service is updated.
      *
-     * @param number $objectid Service ID
+     * @param int $objectid Service ID
+     *
+     * @throws \coding_exception
+     * @throws \dml_exception
      */
     public static function service_updated($objectid = 0) {
         $context = context_system::instance();
 
         $event = local_webhooks\event\service_updated::create(
-            array(
-                "context"  => $context,
-                "objectid" => $objectid
-            )
+            compact('context', 'objectid')
         );
 
         $event->trigger();
diff --git a/restorebackup.php b/restorebackup.php
index ab35b95..2c0cb39 100644
--- a/restorebackup.php
+++ b/restorebackup.php
@@ -22,18 +22,18 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-require_once(__DIR__ . "/../../config.php");
-require_once(__DIR__ . "/classes/service_form.php");
-require_once(__DIR__ . "/lib.php");
+require_once(__DIR__ . '/../../config.php');
+require_once(__DIR__ . '/classes/service_form.php');
+require_once(__DIR__ . '/lib.php');
 
-require_once($CFG->libdir . "/adminlib.php");
+require_once($CFG->libdir . '/adminlib.php');
 
 /* Link generation */
-$baseurl        = new moodle_url("/local/webhooks/restorebackup.php");
-$managerservice = new moodle_url("/local/webhooks/index.php");
+$baseurl = new moodle_url('/local/webhooks/restorebackup.php');
+$managerservice = new moodle_url('/local/webhooks/index.php');
 
 /* Configure the context of the page */
-admin_externalpage_setup("local_webhooks", "", null, $baseurl, array());
+admin_externalpage_setup('local_webhooks', '', null, $baseurl);
 $context = context_system::instance();
 
 /* Create an editing form */
@@ -46,13 +46,13 @@ if ($mform->is_cancelled()) {
 
 /* Processing the received file */
 if ($data = $mform->get_data()) {
-    $content = $mform->get_file_content("backupfile");
+    $content = $mform->get_file_content('backupfile');
     local_webhooks_restore_backup($content);
-    redirect($managerservice, new lang_string("restorefinished", "moodle"));
+    redirect($managerservice, new lang_string('restorefinished', 'moodle'));
 }
 
 /* The page title */
-$titlepage = new lang_string("backup", "moodle");
+$titlepage = new lang_string('backup', 'moodle');
 $PAGE->navbar->add($titlepage);
 $PAGE->set_heading($titlepage);
 $PAGE->set_title($titlepage);
diff --git a/settings.php b/settings.php
index 9a79c13..4da9dba 100644
--- a/settings.php
+++ b/settings.php
@@ -24,9 +24,14 @@
 
 defined('MOODLE_INTERNAL') || die();
 
+/** @var \admin_root $ADMIN */
+
 if ($hassiteconfig) {
-    $ADMIN->add("server", new admin_externalpage("local_webhooks",
-        new lang_string("pluginname", "local_webhooks"),
-        new moodle_url("/local/webhooks/index.php")
-    ));
+    $ADMIN->add(
+        'server', new admin_externalpage(
+            'local_webhooks',
+            new lang_string('pluginname', 'local_webhooks'),
+            new moodle_url('/local/webhooks/index.php')
+        )
+    );
 }
\ No newline at end of file
diff --git a/version.php b/version.php
index 4e95118..7b5dfda 100644
--- a/version.php
+++ b/version.php
@@ -24,8 +24,8 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->release   = "3.0.1 (Build: 2018061900)";
-$plugin->version   = 2018061900;
-$plugin->requires  = 2016112900;
-$plugin->component = "local_webhooks";
-$plugin->maturity  = MATURITY_STABLE;
\ No newline at end of file
+$plugin->release = '3.0.1 (Build: 2018061900)';
+$plugin->version = 2018061900;
+$plugin->requires = 2016112900;
+$plugin->component = 'local_webhooks';
+$plugin->maturity = MATURITY_STABLE;
\ No newline at end of file