correct type issues

src/ViewModel/Chat/chatMessageViewModel.ts

@@ -11,9 +11,9 @@ import {
 export default class ChatMessageViewModel {
     // data
     chatMessage: ChatMessage;
-    channel: string;
-    sender: string;
-    dateSent: string;
+    channel: string = "";
+    sender: string = "";
+    dateSent: string = "";
     body: React.State<string> = new React.State("");
     inlineReply: ChatMessageViewModel | undefined = undefined;
     status: React.State<ChatMessageStatuses | any> = new React.State<any>(

src/ViewModel/Chat/chatViewModel.ts

@@ -143,14 +143,14 @@ export default class ChatViewModel extends ContextHost<ChatPageTypes> {
 
     // init
     constructor(
-        public readonly coreViewModel: CoreViewModel,
+        readonly coreViewModel: CoreViewModel,
         public readonly chatModel: ChatModel,
         public readonly settingsViewModel: SettingsViewModel,
         public readonly notificationViewModel: NotificationViewModel,
         public readonly connectionViewModel: ConnectionViewModel,
         public readonly chatListViewModel: ChatListViewModel,
     ) {
-        super("chat");
+        super("chat", coreViewModel);
 
         // page viewModels
         this.calendarViewModel = new CalendarPageViewModel(

src/ViewModel/Global/coreViewModel.ts

@@ -9,7 +9,7 @@ import ConnectionModel from "../../Model/Global/connectionModel";
 import ChatListModel from "../../Model/Chat/chatListModel";
 
 export default class CoreViewModel {
-    readonly BUILD = "Build 26.09.06.A";
+    readonly BUILD = "Build 26.09.09.A";
 
     translations: Translations;
 
@@ -40,7 +40,8 @@ export default class CoreViewModel {
             return;
 
         while (this.contexts.length > 0) {
-            const currentContext: Context = this.context;
+            const currentContext: Context|undefined= this.context;
+	    if (!currentContext) return;
             currentContext.handleContextClose(fromHistoryEvent);
             this.contextStack.delete(currentContext.contextId);
             if (currentContext.contextId == contextId) break;
@@ -53,7 +54,7 @@ export default class CoreViewModel {
         const contexts: Context[] = this.contexts;
         while (contexts.length > 0) {
             const currentContext: Context | undefined = contexts.pop();
-            if (!currentContext) contexts;
+            if (!currentContext) return;
             const isHandled: boolean = currentContext.handleKeystroke(e);
             if (isHandled == true) break;
         }
@@ -102,6 +103,7 @@ export default class CoreViewModel {
         document.body.addEventListener("keydown", this.handleKeyDown);
 
         window.onpopstate = () => {
+	    if (!this.context) return;
             this.closeContext(this.context.contextId, true);
         };
 
@@ -142,7 +144,6 @@ export class Context {
 }
 
 export class ContextHost<T> extends Context {
-    coreViewModel: CoreViewModel;
     contexts = new Map<T, Context>();
     currentContext = new React.State<Context | undefined>(undefined);
 
@@ -169,8 +170,10 @@ export class ContextHost<T> extends Context {
     updateContexts = (): void => {
         if (this.isOpen == false) return;
 
+	const selection = this.contextSelection;
+	if (!selection) return;
         const selectedContext: Context | undefined = this.contexts.get(
-            this.contextSelection,
+            selection
         );
         if (!selectedContext) return;
         if (selectedContext != this.currentContext.value) {
@@ -180,4 +183,8 @@ export class ContextHost<T> extends Context {
         this.coreViewModel.context = selectedContext;
         this.currentContext.value = selectedContext;
     };
+    
+    constructor(contextDebugDescription: string, public coreViewModel: CoreViewModel) {
+	super(contextDebugDescription);
+    }
 }

src/ViewModel/Global/fileTransferViewModel.ts

@@ -54,7 +54,7 @@ export default class FileTransferViewModel extends Context {
     exportKey: React.State<string> = new React.State("");
     exportKeyConfirmation: React.State<string> = new React.State("");
 
-    importedFile: React.State<File | undefined> = new React.State(undefined);
+    importedFile: React.State<File | undefined> = new React.State<File | undefined>(undefined);
     importedFileString: React.State<string> = new React.State("");
     importKey: React.State<string> = new React.State("");
     isImportKeyCorrect: React.State<boolean> = new React.State(true);
@@ -158,6 +158,7 @@ export default class FileTransferViewModel extends Context {
         if (!input) return;
         if (!(input instanceof HTMLInputElement)) return;
 
+	if (!input.files) return;
         const file = input.files[0];
         this.importedFile.value = file;
     };
@@ -170,6 +171,7 @@ export default class FileTransferViewModel extends Context {
         reader.readAsText(file, "utf8");
         reader.onload = () => {
             const result = reader.result;
+	    if (!result) return;
             this.importedFileString.value = result.toString();
             this.showImportDecryptDataModal();
         };

src/ViewModel/Global/notificationViewModel.ts

@@ -35,7 +35,7 @@ export default class NotificationViewModel {
     };
 
     openNotification = () => {
-        const notification: Notification = this.marquee.value;
+        const notification: Notification|undefined = this.marquee.value;
         if (notification == undefined) return;
 
         const chat = [
@@ -44,6 +44,7 @@ export default class NotificationViewModel {
             (chat) =>
                 chat.chatModel.unwrappedPrimaryChannel == notification.chat,
         );
+	if (!chat) return;
         chat.open();
         chat.openPage(ChatPageTypes.Messages);
     };
@@ -55,7 +56,8 @@ export default class NotificationViewModel {
             return this.stopLoop();
         }
 
-        const notification: Notification = this.messagesInMarquee.shift();
+        const notification: Notification|undefined = this.messagesInMarquee.shift();
+	if (!notification) return;
         this.seenMessageIds.delete(notification.messageId);
         this.marquee.value = notification;
     };

src/ViewModel/Global/settingsViewModel.ts

@@ -9,14 +9,14 @@ export default class SettingsViewModel extends Context {
     usernameInput: React.State<string> = new React.State("");
     isShowingSettingsModal: React.State<boolean> = new React.State(false);
     selectedModalPage: React.State<SettingsModalPages | undefined> =
-        new React.State(undefined);
+        new React.State<SettingsModalPages | undefined>(undefined);
     requiresReload = new React.State<boolean>(false);
 
     firstDayOfWeek: React.State<string> = new React.State("0");
-    language: React.State<Languages | string> = new React.State(
+    language: React.State<Languages | string> = new React.State<Languages | string>(
         Languages.English,
     );
-    theme: React.State<ThemeSettings | string> = new React.State(
+    theme: React.State<ThemeSettings | string> = new React.State<ThemeSettings | string>(
         ThemeSettings.System,
     );
 

src/ViewModel/Global/storageViewModel.ts

@@ -23,7 +23,7 @@ export default class StorageViewModel extends Context {
         const path: string[] = StorageModel.stringToPathComponents(
             this.selectedPath.value,
         );
-        const content: string | undefined =
+        const content: string | null =
             this.coreViewModel.storageModel.read(path);
         return (
             (content ?? this.coreViewModel.translations.storage.notAFile) ||

src/ViewModel/Pages/messagePageViewModel.ts

@@ -68,7 +68,7 @@ export default class MessagePageViewModel extends Context {
         );
     };
 
-    setReply = (chatMessageViewModel: ChatMessageViewModel): void => {
+    setReply = (chatMessageViewModel: ChatMessageViewModel|undefined): void => {
         this.replyingMessage.value = chatMessageViewModel;
         this.setFocus();
     };

src/ViewModel/Pages/taskPageViewModel.ts

@@ -167,11 +167,11 @@ export default class TaskPageViewModel extends ContextHost<string> {
 
     // init
     constructor(
-        public readonly coreViewModel: CoreViewModel,
+        readonly coreViewModel: CoreViewModel,
         public readonly chatViewModel: ChatViewModel,
         public readonly boardsAndTasksModel: BoardsAndTasksModel,
     ) {
-        super("task-page");
+        super("task-page", coreViewModel);
 
         this.loadData(); // needed for board options in calendar