create or rename activity

LeCountdown/Views/NewCountdownView.swift

@@ -69,7 +69,9 @@ struct CountdownEditView : View {
     @State var nameString: String = ""
 
     @State var deleteConfirmationShown: Bool = false
-    
+    @State var activityNameConfirmationShown: Bool = false
+    @State fileprivate var _rename: Bool? = nil
+
     @State var errorShown: Bool = false
     @State var error: Error? = nil
     
@@ -100,6 +102,19 @@ struct CountdownEditView : View {
             }, message: {
                 Text("Do you really want to delete?")
             })
+            .confirmationDialog("", isPresented: $activityNameConfirmationShown, actions: {
+                Button("Rename") {
+                    self._rename = true
+                    self._save()
+                }
+                Button("New activity") {
+                    self._rename = false
+                    self._save()
+                }
+            }, message: {
+                Text("Do you wish to rename or create a new activity")
+            })
+
             .alert("", isPresented: $errorShown, actions: { }, message: {
                 Text(error?.localizedDescription ?? "error")
             })
@@ -192,8 +207,24 @@ struct CountdownEditView : View {
             cd.order = max + 1
         }
         if !self.nameString.isEmpty {
-            cd.activity = CoreDataRequests.getOrCreateActivity(name: self.nameString)
-            // TODO: would you like to rename or create a new activity?
+            
+            if let activity = cd.activity, let currentActivityName = activity.name, self.nameString != currentActivityName {
+                
+                switch self._rename {
+                case .none:
+                    self.activityNameConfirmationShown = true
+                    return
+                case .some(let rename):
+                    if rename {
+                        activity.name = self.nameString
+                    } else {
+                        cd.activity = CoreDataRequests.getOrCreateActivity(name: self.nameString)
+                    }
+                }
+            } else {
+                cd.activity = CoreDataRequests.getOrCreateActivity(name: self.nameString)
+            }
+            
         }
         
         self._saveContext()