🐛 Fixing bug where User data was not properly saved to CoreData

DHBW-Service.xcodeproj/project.pbxproj

@@ -18,6 +18,7 @@
 		CDCD721A25912E1200FBF2F5 /* HomeView.swift in Sources */ = {isa = PBXBuildFile; fileRef = CDCD721925912E1200FBF2F5 /* HomeView.swift */; };
 		CDCD72242591316500FBF2F5 /* LocalSettings.swift in Sources */ = {isa = PBXBuildFile; fileRef = CDCD72232591316500FBF2F5 /* LocalSettings.swift */; };
 		CDCD7230259135C500FBF2F5 /* FirstOpeningSettings.swift in Sources */ = {isa = PBXBuildFile; fileRef = CDCD722F259135C500FBF2F5 /* FirstOpeningSettings.swift */; };
+		CDDCF47B2591FE550027CDC5 /* UtilityFunctions.swift in Sources */ = {isa = PBXBuildFile; fileRef = CDDCF47A2591FE550027CDC5 /* UtilityFunctions.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -55,6 +56,7 @@
 		CDCD721925912E1200FBF2F5 /* HomeView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HomeView.swift; sourceTree = "<group>"; };
 		CDCD72232591316500FBF2F5 /* LocalSettings.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LocalSettings.swift; sourceTree = "<group>"; };
 		CDCD722F259135C500FBF2F5 /* FirstOpeningSettings.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FirstOpeningSettings.swift; sourceTree = "<group>"; };
+		CDDCF47A2591FE550027CDC5 /* UtilityFunctions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UtilityFunctions.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -107,6 +109,7 @@
 			children = (
 				CDCD720F25912D3C00FBF2F5 /* App */,
 				CDCD721025912D4900FBF2F5 /* Views */,
+				CDDCF4792591FE410027CDC5 /* Utility */,
 				CDCD72222591314000FBF2F5 /* Observables */,
 				CDCD721125912D5400FBF2F5 /* CoreData */,
 				CDCD721225912D6300FBF2F5 /* Supporting Files */,
@@ -201,6 +204,14 @@
 			path = Other;
 			sourceTree = "<group>";
 		};
+		CDDCF4792591FE410027CDC5 /* Utility */ = {
+			isa = PBXGroup;
+			children = (
+				CDDCF47A2591FE550027CDC5 /* UtilityFunctions.swift */,
+			);
+			path = Utility;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -336,6 +347,7 @@
 				CDCD72242591316500FBF2F5 /* LocalSettings.swift in Sources */,
 				CD9FAB8D258EC60600D6D0C5 /* DHBW_Service.xcdatamodeld in Sources */,
 				CDCD721A25912E1200FBF2F5 /* HomeView.swift in Sources */,
+				CDDCF47B2591FE550027CDC5 /* UtilityFunctions.swift in Sources */,
 				CD9FAB81258EC60200D6D0C5 /* DHBW_ServiceApp.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -495,7 +507,7 @@
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_ASSET_PATHS = "\"DHBW-Service/Preview Content\"";
-				DEVELOPMENT_TEAM = G3TRS8UHWN;
+				DEVELOPMENT_TEAM = HS7KNT4MZ2;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = "DHBW-Service/Supporting Files/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
@@ -517,7 +529,7 @@
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_ASSET_PATHS = "\"DHBW-Service/Preview Content\"";
-				DEVELOPMENT_TEAM = G3TRS8UHWN;
+				DEVELOPMENT_TEAM = HS7KNT4MZ2;
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = "DHBW-Service/Supporting Files/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 14.0;

DHBW-Service/CoreData/Persistence.swift

@@ -51,7 +51,7 @@ struct PersistenceController {
         if self.context.hasChanges {
             do {
                 try self.context.save()
-                print("In CoreData.stack.save()")
+                print("In PersistenceController.shared.save()")
             } catch {
                 let nserror = error as NSError
                 fatalError("Unresolved error \(nserror), \(nserror.userInfo)")

DHBW-Service/Utility/UtilityFunctions.swift

@@ -0,0 +1,42 @@
+//
+//  UtilityFunctions.swift
+//  DHBW-Service
+//
+//  Created by Patrick Müller on 22.12.20.
+//
+
+import Foundation
+import CoreData
+
+class UtilityFunctions {
+    public class func getCoreDataObject(entity: String) -> [NSManagedObject]{
+        let managedContext =
+            PersistenceController.shared.context
+        
+        let fetchRequest =
+          NSFetchRequest<NSManagedObject>(entityName: entity)
+        
+        do {
+            return try managedContext.fetch(fetchRequest)
+        } catch let error as NSError {
+            print("Could not fetch. \(error), \(error.userInfo)")
+            return []
+        }
+    }
+    
+    public class func deleteAllCoreDataEntitiesOfType(type: String) -> Bool{
+        let fetchRequest: NSFetchRequest<NSFetchRequestResult> = NSFetchRequest(entityName: type)
+        let deleteRequest = NSBatchDeleteRequest(fetchRequest: fetchRequest)
+
+        do {
+            try PersistenceController.shared.context.execute(deleteRequest)
+            
+            PersistenceController.shared.save()
+            
+            return true
+        } catch let error as NSError {
+            print(error)
+            return false
+        }
+    }
+}

DHBW-Service/Views/Other/FirstOpeningSettings.swift

@@ -34,6 +34,7 @@ struct FirstOpeningSettings: View {
                 .padding(.horizontal)
             Button(action: {
                 self.settings.isFirstOpening = !self.settings.isFirstOpening
+                self.saveToCoreData()
             }){
                 Text("Confirm")
                     .padding()
@@ -47,6 +48,11 @@ struct FirstOpeningSettings: View {
 
 extension FirstOpeningSettings{
     func saveToCoreData(){
+        // Delete old user data
+        let status = UtilityFunctions.deleteAllCoreDataEntitiesOfType(type: "User")
+        print("Deleting old user data status: \(status)")
+        
+        // Insert new user data
         let entity = NSEntityDescription.entity(forEntityName: "User", in: PersistenceController.shared.context)!
         let user = NSManagedObject(entity: entity, insertInto: PersistenceController.shared.context)
         user.setValue(name, forKey: "name")

DHBW-Service/Views/Tabs/HomeView.swift

@@ -10,10 +10,7 @@ import CoreData
 
 struct HomeView: View {
     @EnvironmentObject var settings: LocalSettings
-    @State var user: NSManagedObject = NSManagedObject()
+    @State private var name: String = ""
-    
-    
-    
     
     var body: some View {
         VStack {
@@ -24,7 +21,7 @@ struct HomeView: View {
             }
             Text("Test")
             
-//            Text(user.value(forKey: "name") as! String)
+            Text(self.name)
             
         }.onAppear{
             self.readFromCoreData()
@@ -33,15 +30,12 @@ struct HomeView: View {
 }
 
 extension HomeView{
-    func readFromCoreData(){
+    func readFromCoreData() {
-        let managedContext = PersistenceController.shared.context
+        let fetchedData = UtilityFunctions.getCoreDataObject(entity: "User")
-        let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "User")
         
-        do {
+        if(!fetchedData.isEmpty) {
-            try print(managedContext.fetch(fetchRequest))
+            let user = fetchedData[0]
-            self.user = try managedContext.fetch(fetchRequest)[0]
+            self.name = user.value(forKey: "name") as! String
-        } catch let error as NSError {
-            print(error)
         }
     }
 }