From 985e8ffe8ea9d9774738cba64534bd44bea260b3 Mon Sep 17 00:00:00 2001
From: Javier Cicchelli <javier@rock-n-code.com>
Date: Wed, 12 Apr 2023 16:34:28 +0200
Subject: [PATCH] Implemented the "loadLocations()" function in the
 LocationsListViewModel view model.

---
 .../LocationsListViewModel.swift              | 34 ++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/Apps/Locations/Sources/Screens/LocationsList/LocationsListViewModel.swift b/Apps/Locations/Sources/Screens/LocationsList/LocationsListViewModel.swift
index 6b4f55d..7b68701 100644
--- a/Apps/Locations/Sources/Screens/LocationsList/LocationsListViewModel.swift
+++ b/Apps/Locations/Sources/Screens/LocationsList/LocationsListViewModel.swift
@@ -6,10 +6,17 @@
 //  Copyright © 2023 Röck+Cöde. All rights reserved.
 //
 
+import CoreData
 import Combine
-import Core
+import Dependency
+import Foundation
+import Persistence
 
 class LocationsListViewModel: ObservableObject {
+    
+    // MARK: Dependencies
+    
+    @Dependency(\.persistence) private var persistence
 
     // MARK: Properties
     
@@ -17,6 +24,15 @@ class LocationsListViewModel: ObservableObject {
     
     @Published private var viewStatus: LocationsListViewStatus = .initialised
     
+    private lazy var fetchedResultsController = NSFetchedResultsController(
+        fetchRequest: NSFetchRequest<Location>.allLocations(),
+        managedObjectContext: persistence.container.viewContext,
+        sectionNameKeyPath: nil,
+        cacheName: nil
+    )
+    
+    private let loadRemoteLocations = LoadRemoteLocationsUseCase()
+    
     // MARK: Initialisers
     
     init(coordinator: LocationsListCoordination) {
@@ -39,6 +55,22 @@ extension LocationsListViewModel: LocationsListViewModeling {
         coordinator?.openAddLocation()
     }
     
+    func loadLocations() {
+        Task {
+            do {
+                viewStatus = .loading
+                
+                try await loadRemoteLocations()
+                
+                try fetchedResultsController.performFetch()
+
+                viewStatus = .loaded
+            } catch {
+                viewStatus = .error
+            }
+        }
+    }
+    
 }
 
 // MARK: - Enumerations