When selecting the any provider option in the booking page then merge all the available hours of all providers that can serve the selected service (#1147).

application/controllers/Appointments.php

@@ -338,26 +338,35 @@ class Appointments extends EA_Controller {
 
             // If the user has selected the "any-provider" option then we will need to search for an available provider
             // that will provide the requested service.
-            if ($provider_id === ANY_PROVIDER)
-            {
-                $provider_id = $this->search_any_provider($service_id, $selected_date);
-
-                if ($provider_id === NULL)
-                {
-                    $this->output
-                        ->set_content_type('application/json')
-                        ->set_output(json_encode([]));
-
-                    return;
-                }
-            }
-
             $service = $this->services_model->get_row($service_id);
             
+            if ($provider_id === ANY_PROVIDER)
+            {
+                $providers = $this->providers_model->get_batch(); 
+                
+                $available_hours = []; 
+                
+                foreach($providers as $provider)
+                {
+                    if (!in_array($service_id, $provider['services']))
+                    {
+                        continue; 
+                    }
+                    
+                    $provider_available_hours = $this->availability->get_available_hours($selected_date, $service, $provider, $exclude_appointment_id); 
+                    
+                    $available_hours = array_merge($available_hours, $provider_available_hours);
+                }
+
+                $response = array_unique(array_values($available_hours)); 
+            }
+            else
+            {
                 $provider = $this->providers_model->get_row($provider_id);
 
                 $response = $this->availability->get_available_hours($selected_date, $service, $provider, $exclude_appointment_id);
             }
+        }
         catch (Exception $exception)
         {
             $this->output->set_status_header(500);