Add developer option for clearing the application cache (#852)

* Add developer option for clearing the application cache

* Tweaks following code review

ElementX/Sources/Screens/DeveloperOptionsScreen/DeveloperOptionsScreenCoordinator.swift

@@ -16,11 +16,23 @@
 
 import SwiftUI
 
+enum DeveloperOptionsScreenCoordinatorAction {
+    case clearCache
+}
+
 final class DeveloperOptionsScreenCoordinator: CoordinatorProtocol {
-    private let viewModel: DeveloperOptionsScreenViewModelProtocol
+    private var viewModel: DeveloperOptionsScreenViewModelProtocol
+    
+    var callback: ((DeveloperOptionsScreenCoordinatorAction) -> Void)?
     
     init() {
         viewModel = DeveloperOptionsScreenViewModel()
+        viewModel.callback = { [weak self] action in
+            switch action {
+            case .clearCache:
+                self?.callback?(.clearCache)
+            }
+        }
     }
             
     func toPresentable() -> AnyView {

ElementX/Sources/Screens/DeveloperOptionsScreen/DeveloperOptionsScreenModels.swift

@@ -16,7 +16,9 @@
 
 import Foundation
 
-enum DeveloperOptionsScreenViewModelAction { }
+enum DeveloperOptionsScreenViewModelAction {
+    case clearCache
+}
 
 struct DeveloperOptionsScreenViewState: BindableState {
     var bindings: DeveloperOptionsScreenViewStateBindings
@@ -34,4 +36,5 @@ enum DeveloperOptionsScreenViewAction {
     case changedStartChatFlowEnabled
     case changedStartChatUserSuggestionsEnabled
     case changedInvitesFlowEnabled
+    case clearCache
 }

ElementX/Sources/Screens/DeveloperOptionsScreen/DeveloperOptionsScreenViewModel.swift

@@ -45,6 +45,8 @@ class DeveloperOptionsScreenViewModel: DeveloperOptionsScreenViewModelType, Deve
             ServiceLocator.shared.settings.startChatUserSuggestionsEnabled = state.bindings.startChatUserSuggestionsEnabled
         case .changedInvitesFlowEnabled:
             ServiceLocator.shared.settings.invitesFlowEnabled = state.bindings.invitesFlowEnabled
+        case .clearCache:
+            callback?(.clearCache)
         }
     }
 }

ElementX/Sources/Screens/DeveloperOptionsScreen/View/DeveloperOptionsScreen.swift

@@ -59,9 +59,16 @@ struct DeveloperOptionsScreen: View {
                     Text("🥳")
                         .frame(maxWidth: .infinity)
                 }
-                .buttonStyle(FormButtonStyle())
             }
-            .formSectionStyle()
+            
+            Section {
+                Button(role: .destructive) {
+                    context.send(viewAction: .clearCache)
+                } label: {
+                    Text("Clear cache")
+                        .frame(maxWidth: .infinity)
+                }
+            }
         }
         .overlay(effectsView)
         .scrollContentBackground(.hidden)

ElementX/Sources/Screens/SettingsScreen/SettingsScreenCoordinator.swift

@@ -26,6 +26,7 @@ struct SettingsScreenCoordinatorParameters {
 enum SettingsScreenCoordinatorAction {
     case dismiss
     case logout
+    case clearCache
 }
 
 final class SettingsScreenCoordinator: CoordinatorProtocol {
@@ -114,6 +115,14 @@ final class SettingsScreenCoordinator: CoordinatorProtocol {
     
     private func presentDeveloperOptions() {
         let coordinator = DeveloperOptionsScreenCoordinator()
+        
+        coordinator.callback = { [weak self] action in
+            switch action {
+            case .clearCache:
+                self?.callback?(.clearCache)
+            }
+        }
+        
         parameters.navigationStackCoordinator?.push(coordinator)
     }