Integrated the multiple attendants in the availabilities generation (#109).

src/application/controllers/Appointments.php

@@ -315,6 +315,7 @@ class Appointments extends CI_Controller {
 			}
 
             $availabilities_type = $this->services_model->get_value('availabilities_type', $_POST['service_id']);
+            $attendants_number = $this->services_model->get_value('attendants_number', $_POST['service_id']);
 
 			$empty_periods = $this->_get_provider_available_time_periods($_POST['provider_id'],
 					$_POST['selected_date'], $exclude_appointments);
@@ -323,6 +324,11 @@ class Appointments extends CI_Controller {
 					$_POST['service_duration'], filter_var($_POST['manage_mode'], FILTER_VALIDATE_BOOLEAN),
                     $availabilities_type);
 
+            if ($attendants_number > 1) {
+                $this->_get_multiple_attendants_hours($available_hours, $attendants_number, $_POST['service_id'],
+                    $_POST['selected_date']);
+            }
+
             echo json_encode($available_hours);
 
         } catch(Exception $exc) {
@@ -548,6 +554,7 @@ class Appointments extends CI_Controller {
 	 */
 	protected function _check_datetime_availability() {
 		$this->load->model('services_model');
+		$this->load->model('appointments_model');
 
 		$appointment  = $_POST['post_data']['appointment'];
 
@@ -555,6 +562,22 @@ class Appointments extends CI_Controller {
 
 		$exclude_appointments = (isset($appointment['id'])) ? array($appointment['id']) : array();
 
+        $attendants_number = $this->services_model->get_value('attendants_number', $appointment['id_services']);
+
+        if ($attendants_number > 1) {
+            // Exclude all the appointments that will are currently registered.
+            $exclude = $this->appointments_model->get_batch([
+                'id_services' => $appointment['id_services'],
+                'start_datetime' => $appointment['start_datetime']
+            ]);
+
+            if (!empty($exclude) && count($exclude) < $attendants_number) {
+                foreach ($exclude as $entry) {
+                    $exclude_appointments[] = $entry['id'];
+                }
+            }
+        }
+
 		if ($appointment['id_users_provider'] === ANY_PROVIDER) {
 			$appointment['id_users_provider'] = $this->_search_any_provider($appointment['id_services'],
 				date('Y-m-d', strtotime($appointment['start_datetime'])));
@@ -830,6 +853,40 @@ class Appointments extends CI_Controller {
 
 		return $available_hours;
 	}
+
+    /**
+     * Get multiple attendants hours.
+     *
+     * This method will add the extra appointment hours whenever a service accepts multiple attendants.
+     *
+     * @param array $available_hours The previously calculated appointment hours.
+     * @param int $attendants_number Service attendants number.
+     * @param int $service_id Selected service ID.
+     * @param string $selected_date The selected appointment date.
+     */
+    protected function _get_multiple_attendants_hours(&$available_hours, $attendants_number, $service_id,
+            $selected_date) {
+        $this->load->model('appointments_model');
+
+        $appointments = $this->appointments_model->get_batch(
+            'id_services = ' . $this->db->escape($service_id) . ' AND DATE(start_datetime) = DATE('
+            . $this->db->escape(date('Y-m-d', strtotime($selected_date))) . ')');
+
+        $hours = [];
+
+        foreach($appointments as $appointment) {
+            $hour = date('H:i', strtotime($appointment['start_datetime']));
+            $current_attendants_number = $this->appointments_model->appointment_count_for_hour($service_id,
+                    $selected_date, $hour);
+            if ($current_attendants_number < $attendants_number && !in_array($hour, $available_hours)) {
+                $available_hours[] = $hour;
+            }
+        }
+
+        $available_hours = array_values($available_hours);
+		sort($available_hours, SORT_STRING );
+		$available_hours = array_values($available_hours);
+    }
 }
 
 /* End of file appointments.php */

src/application/controllers/api/v1/Availabilities.php

@@ -61,6 +61,11 @@ class Availabilities extends API_V1_Controller {
             $availableHours = $this->_calculateAvailableHours($emptyPeriods,
                     $date->format('Y-m-d'), $service['duration'], false, $service['availabilities_type']);
 
+            if ($service['attendants_number'] > 1) {
+                $this->_getMultipleAttendantsHours($availableHours, $service['attendants_number'], $service['id'],
+                    $date->format('Y-m-d'));
+            }
+
             $this->output
                 ->set_content_type('application/json')
                 ->set_output(json_encode($availableHours));
@@ -277,7 +282,41 @@ class Availabilities extends API_V1_Controller {
 
         return $available_hours;
     }
+
+    /**
+     * Get multiple attendants hours.
+     *
+     * This method will add the extra appointment hours whenever a service accepts multiple attendants.
+     *
+     * @param array $available_hours The previously calculated appointment hours.
+     * @param int $attendants_number Service attendants number.
+     * @param int $service_id Selected service ID.
+     * @param string $selected_date The selected appointment date.
+     */
+    protected function _getMultipleAttendantsHours(&$available_hours, $attendants_number, $service_id,
+            $selected_date) {
+        $this->load->model('appointments_model');
+
+        $appointments = $this->appointments_model->get_batch(
+            'id_services = ' . $this->db->escape($service_id) . ' AND DATE(start_datetime) = DATE('
+            . $this->db->escape(date('Y-m-d', strtotime($selected_date))) . ')');
+
+        $hours = [];
+
+        foreach($appointments as $appointment) {
+            $hour = date('H:i', strtotime($appointment['start_datetime']));
+            $current_attendants_number = $this->appointments_model->appointment_count_for_hour($service_id,
+                    $selected_date, $hour);
+            if ($current_attendants_number < $attendants_number && !in_array($hour, $available_hours)) {
+                $available_hours[] = $hour;
+            }
         }
 
-/* End of file Appointments.php */
+        $available_hours = array_values($available_hours);
-/* Location: ./application/controllers/api/v1/Appointments.php */
+		sort($available_hours, SORT_STRING );
+		$available_hours = array_values($available_hours);
+    }
+}
+
+/* End of file Availabilities.php */
+/* Location: ./application/controllers/api/v1/Availabilities.php */

src/application/models/Appointments_model.php

@@ -393,6 +393,22 @@ class Appointments_Model extends CI_Model {
         $this->db->update('ea_appointments', array('id_google_calendar' => NULL),
                 array('id_users_provider' => $provider_id));
     }
+
+    /**
+     * Get appointment count for the provided start datetime.
+     *
+     * @param int $service_id Selected service ID.
+     * @param string $selected_date Selected date string.
+     * @param string $hour Selected hour string.
+     *
+     * @return int Returns the appointment number at the selected start time.
+     */
+    public function appointment_count_for_hour($service_id, $selected_date, $hour) {
+        return $this->db->get_where('ea_appointments', [
+            'id_services' => $service_id,
+            'start_datetime' => date('Y-m-d H:i:s', strtotime($selected_date . ' ' . $hour . ':00'))
+        ])->num_rows();
+    }
 }
 
 /* End of file appointments_model.php */