Google Calendar integration for booking notifications

- New GoogleCalendar library: createEvent/updateEvent/deleteEvent via service account, all wrapped in try/catch so failures never break booking flow
- booking_process: creates worker + owner calendar events on new booking
- manage_booking_process: deletes old events, creates new ones on modify
- manage_booking_cancel: deletes events before cancellation
- Service_model: updateBookingCalEvents() stores gcal event IDs
- Admin worker form: Google Calendar ID field added
- PHPMailer: enabled exceptions (was silently swallowing SMTP errors)
- Config: application/config/google_calendar.php for service account path + Evelin calendar ID

DB migration required:
  ALTER TABLE workers ADD COLUMN google_calendar_id VARCHAR(255) NULL DEFAULT NULL;
  ALTER TABLE bookings ADD COLUMN gcal_event_id_worker VARCHAR(255) NULL DEFAULT NULL;
  ALTER TABLE bookings ADD COLUMN gcal_event_id_owner VARCHAR(255) NULL DEFAULT NULL;

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

application/config/google_calendar.php

@@ -0,0 +1,5 @@
+<?php
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$config['gcal_service_account_path'] = APPPATH . 'config/service-account-key.json';
+$config['gcal_evelin_calendar_id']   = 'katozoltan0804@gmail.com'; // Evelin's Calendar ID (e.g. her Gmail address)

application/controllers/Admin.php

@@ -649,7 +649,8 @@ class Admin extends CI_Controller {
 					'is_beauty' => $_POST['is_beauty'],
 					'is_barber' => $_POST['is_barber'],
 					'service_category_id' => $_POST['service_category_id'],
-					'is_active' => $_POST['is_active']
+					'is_active' => $_POST['is_active'],
+					'google_calendar_id' => isset($_POST['google_calendar_id']) ? $_POST['google_calendar_id'] : ''
 				);
 				$this->Service_model->updateWorker($_POST['worker_id'], $workerArray);
 				$this->Log_model->addLog('workers', $data['currentUser']->username.' módosította a(z) '.$_POST['worker_name'].' nevű dolgozót ('.implode(',',$workerArray).')', $data['currentUser']->username);

application/controllers/Pages.php

@@ -438,6 +438,28 @@ class Pages extends CI_Controller {
 				}
 			}
 
+			// Google Calendar: create events for worker and owner
+			$this->load->library('GoogleCalendar');
+			$this->config->load('google_calendar');
+			$newBooking = $this->Service_model->getBookingByToken($manageToken);
+			if($newBooking){
+				$gcalServiceNames = implode(', ', array_map(function($s){ return $s->service_name_no; }, $serviceArray));
+				$gcalTitle = $worker->worker_name . ' — ' . $gcalServiceNames . ' — ' . $bookingArray['guest_name'];
+				$gcalDescription = 'Guest: ' . $bookingArray['guest_name'] . "\nPhone: " . $bookingArray['guest_phone'] . "\nEmail: " . $bookingArray['guest_email'];
+				$gcalStart = $bookingArray['booking_date'] . 'T' . $bookingArray['booking_start_time'];
+				$gcalEnd   = $bookingArray['booking_date'] . 'T' . $bookingArray['booking_finish_time'];
+				$workerEventId = null;
+				$ownerEventId  = null;
+				if(!empty($worker->google_calendar_id)){
+					$workerEventId = $this->googlecalendar->createEvent($worker->google_calendar_id, $gcalTitle, $gcalDescription, $gcalStart, $gcalEnd);
+				}
+				$evelinCalId = $this->config->item('gcal_evelin_calendar_id');
+				if(!empty($evelinCalId)){
+					$ownerEventId = $this->googlecalendar->createEvent($evelinCalId, $gcalTitle, $gcalDescription, $gcalStart, $gcalEnd);
+				}
+				$this->Service_model->updateBookingCalEvents($newBooking->booking_id, $workerEventId, $ownerEventId);
+			}
+
 			$content = '';
 			
 			switch($_POST['lang']){
@@ -832,6 +854,32 @@ class Pages extends CI_Controller {
 			if(is_object($sel)) $serviceArray[] = $sel;
 		}
 
+		// Google Calendar: delete old events, create new ones
+		$this->load->library('GoogleCalendar');
+		$this->config->load('google_calendar');
+		$evelinCalId = $this->config->item('gcal_evelin_calendar_id');
+		$oldWorker = $this->Service_model->getWorkerById($booking->worker_id);
+		if(!empty($booking->gcal_event_id_worker) && !empty($oldWorker->google_calendar_id)){
+			$this->googlecalendar->deleteEvent($oldWorker->google_calendar_id, $booking->gcal_event_id_worker);
+		}
+		if(!empty($booking->gcal_event_id_owner) && !empty($evelinCalId)){
+			$this->googlecalendar->deleteEvent($evelinCalId, $booking->gcal_event_id_owner);
+		}
+		$gcalServiceNames = implode(', ', array_map(function($s){ return $s->service_name_no; }, $serviceArray));
+		$gcalTitle = $worker->worker_name . ' — ' . $gcalServiceNames . ' — ' . $booking->guest_name;
+		$gcalDescription = 'Guest: ' . $booking->guest_name . "\nPhone: " . $booking->guest_phone . "\nEmail: " . $booking->guest_email;
+		$gcalStart = $newBookingDate . 'T' . $newStartTime;
+		$gcalEnd   = $newBookingDate . 'T' . $finishTime;
+		$newWorkerEventId = null;
+		$newOwnerEventId  = null;
+		if(!empty($worker->google_calendar_id)){
+			$newWorkerEventId = $this->googlecalendar->createEvent($worker->google_calendar_id, $gcalTitle, $gcalDescription, $gcalStart, $gcalEnd);
+		}
+		if(!empty($evelinCalId)){
+			$newOwnerEventId = $this->googlecalendar->createEvent($evelinCalId, $gcalTitle, $gcalDescription, $gcalStart, $gcalEnd);
+		}
+		$this->Service_model->updateBookingCalEvents($booking->booking_id, $newWorkerEventId, $newOwnerEventId);
+
 		$manageLink = SITEURL.$lang.'/manage-booking/'.$token;
 		$totalServicePrice = 0;
 		foreach($serviceArray as $s){ $totalServicePrice += $s->service_price; }
@@ -941,6 +989,17 @@ class Pages extends CI_Controller {
 		));
 		$this->User_model->sendEmail($emailArray, $lang, '');
 
+		// Google Calendar: delete events on cancellation
+		$this->load->library('GoogleCalendar');
+		$this->config->load('google_calendar');
+		if(!empty($booking->gcal_event_id_worker) && !empty($worker->google_calendar_id)){
+			$this->googlecalendar->deleteEvent($worker->google_calendar_id, $booking->gcal_event_id_worker);
+		}
+		$evelinCalId = $this->config->item('gcal_evelin_calendar_id');
+		if(!empty($booking->gcal_event_id_owner) && !empty($evelinCalId)){
+			$this->googlecalendar->deleteEvent($evelinCalId, $booking->gcal_event_id_owner);
+		}
+
 		$this->Service_model->deleteBooking($booking->booking_id);
 
 		$data['selectedLang'] = $lang;

application/libraries/GoogleCalendar.php

@@ -0,0 +1,85 @@
+<?php
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+class GoogleCalendar {
+
+    private $service = null;
+
+    public function __construct() {
+        require_once FCPATH . 'vendor/autoload.php';
+
+        $CI =& get_instance();
+        $CI->config->load('google_calendar');
+        $serviceAccountPath = $CI->config->item('gcal_service_account_path');
+
+        if (!file_exists($serviceAccountPath)) {
+            return;
+        }
+
+        try {
+            $client = new Google_Client();
+            $client->setAuthConfig($serviceAccountPath);
+            $client->setScopes([Google_Service_Calendar::CALENDAR]);
+            $this->service = new Google_Service_Calendar($client);
+        } catch (Exception $e) {
+            // Silently fail — calendar errors must never break the booking flow
+        }
+    }
+
+    /**
+     * Create a calendar event.
+     * @return string|null  The new event ID, or null on failure.
+     */
+    public function createEvent($calendarId, $title, $description, $startDatetime, $endDatetime) {
+        if (!$this->service || empty($calendarId)) return null;
+        try {
+            $event = new Google_Service_Calendar_Event([
+                'summary'     => $title,
+                'description' => $description,
+                'start'       => ['dateTime' => $startDatetime, 'timeZone' => 'Europe/Oslo'],
+                'end'         => ['dateTime' => $endDatetime,   'timeZone' => 'Europe/Oslo'],
+            ]);
+            $result = $this->service->events->insert($calendarId, $event);
+            return $result->getId();
+        } catch (Exception $e) {
+            return null;
+        }
+    }
+
+    /**
+     * Update an existing calendar event.
+     * @return string|null  The event ID, or null on failure.
+     */
+    public function updateEvent($calendarId, $eventId, $title, $description, $startDatetime, $endDatetime) {
+        if (!$this->service || empty($calendarId) || empty($eventId)) return null;
+        try {
+            $event = $this->service->events->get($calendarId, $eventId);
+            $event->setSummary($title);
+            $event->setDescription($description);
+            $event->setStart(new Google_Service_Calendar_EventDateTime([
+                'dateTime' => $startDatetime,
+                'timeZone' => 'Europe/Oslo',
+            ]));
+            $event->setEnd(new Google_Service_Calendar_EventDateTime([
+                'dateTime' => $endDatetime,
+                'timeZone' => 'Europe/Oslo',
+            ]));
+            $result = $this->service->events->update($calendarId, $eventId, $event);
+            return $result->getId();
+        } catch (Exception $e) {
+            return null;
+        }
+    }
+
+    /**
+     * Delete a calendar event. Silently skips if not found.
+     */
+    public function deleteEvent($calendarId, $eventId) {
+        if (!$this->service || empty($calendarId) || empty($eventId)) return;
+        try {
+            $this->service->events->delete($calendarId, $eventId);
+        } catch (Exception $e) {
+            // Silently skip — event may already be gone
+        }
+    }
+}

application/models/Service_model.php

@@ -562,6 +562,11 @@ class Service_model extends CI_Model {
         return $query->num_rows() > 0 ? $query->result()[0] : false;
     }
 
+    public function updateBookingCalEvents($booking_id, $worker_event_id, $owner_event_id){
+        $this->load->database();
+        $this->db->query("UPDATE bookings SET gcal_event_id_worker = '".$this->db->escape_str($worker_event_id)."', gcal_event_id_owner = '".$this->db->escape_str($owner_event_id)."' WHERE booking_id = '".$this->db->escape_str($booking_id)."';");
+    }
+    
     public function getWorkerSchedule($worker_id) {
         return $this->db
             ->where('worker_id', $worker_id)

application/models/User_model.php

@@ -138,7 +138,7 @@ class User_model extends CI_Model {
         if(!empty($addressList)){
             foreach($addressList as $addressListItem){
                 // Instantiation and passing `true` enables exceptions
-                $mail = new PHPMailer(false);
+                $mail = new PHPMailer(true);
                 $mail->SMTPDebug = false;
                 $mail->do_debug = 1;
                 try {
@@ -188,6 +188,7 @@ class User_model extends CI_Model {
                     
                 } catch (Exception $e) {
                     //header('location:'.base_url().'manage-applicants/?email-sent=false&error='.$mail->ErrorInfo);
+                    log_message('error', 'sendEmail FAILED: ' . $mail->ErrorInfo);
                     echo "Üzenetküldési hiba. Mailer Error: {$mail->ErrorInfo}";
                 }       
 

application/views/admin/includes/update-worker-form.php

@@ -52,6 +52,10 @@
                 <option value="0" <?php echo !$selectedItem->is_active?'selected':'';?>>nem</option>
             </select>
         </div>
+        <div class="formRow">
+            <label class="formTitle">Google Calendar ID</label>
+            <input type="text" class="formInputBox" name="google_calendar_id" value="<?php echo isset($selectedItem->google_calendar_id) ? $selectedItem->google_calendar_id : '';?>">
+        </div>
         <div class="formRow">
             <input type="submit" class="submitButton" name="updateWorker" value="Módosítás">
             <a href="<?php echo base_url();?>workers" class="cancelButton">Mégsem</a>

composer.json

@@ -11,7 +11,9 @@
 		"source": "https://github.com/bcit-ci/CodeIgniter"
 	},
 	"require": {
-		"php": ">=5.3.7"
+		"php": ">=5.3.7",
+		"google/apiclient": "^2.0",
+		"phpmailer/phpmailer": "^6.0"
 	},
 	"suggest": {
 		"paragonie/random_compat": "Provides better randomness in PHP 5.x"