Show native save dialogs in desktop app #50, #264

This commit introduces native operating system file dialogs in the
desktop application replacing the existing web-based dialogs.

It lays the foundation for future enhancements such as:

- Providing error messages when saving or executing files, addressing
  #264.
- Creating system restore points, addressing #50.

Documentation updates:

- Update `desktop-vs-web-features.md` with added functionality.
- Update `README.md` with security feature highlights.
- Update home page documentation to emphasize security features.

Other supporting changes include:

- Integrate IPC communication channels for secure Electron dialog API
  interactions.
- Refactor `IpcRegistration` for more type-safety and simplicity.
- Introduce a Vue hook to encapsulate dialog functionality.
- Improve errors during IPC registration for easier troubleshooting.
- Move `ClientLoggerFactory` for consistency in hooks organization and
  remove `LoggerFactory` interface for simplicity.
- Add tests for the save file dialog in the browser context.
- Add `Blob` polyfill in tests to compensate for the missing
  `blob.text()` function in `jsdom` (see jsdom/jsdom#2555).

Improve environment detection logic:

- Treat test environment as browser environments to correctly activate
  features based on the environment. This resolves issues where the
  environment is misidentified as desktop, but Electron preloader APIs
  are missing.
- Rename `isDesktop` environment identification variable to
  `isRunningAsDesktopApplication` for better clarity and to avoid
  confusion with desktop environments in web/browser/test environments.
- Simplify `BrowserRuntimeEnvironment` to consistently detect
  non-desktop application environments.
- Improve environment detection for Electron main process
  (electron/electron#2288).

README.md

@@ -137,6 +137,7 @@ For a detailed comparison of features between the desktop and web versions of pr
 - **Transparent**. Have full visibility into what the tweaks do as you enable them.
 - **Reversible**. Revert if something feels wrong.
 - **Accessible**. No need to run any compiled software on your computer with web version.
+- **Secure**: Security is a top priority at privacy.sexy with comprehensive safeguards in place. [Learn more](./SECURITY.md).
 - **Open**. What you see as code in this repository is what you get. The application itself, its infrastructure and deployments are open-source and automated thanks to [bump-everywhere](https://github.com/undergroundwires/bump-everywhere).
 - **Tested**. A lot of tests. Automated and manual. Community-testing and verification. Stability improvements comes before new features.
 - **Extensible**. Effortlessly [extend scripts](./CONTRIBUTING.md#extend-scripts) with a custom designed [templating language](./docs/templating.md).

docs/desktop-vs-web-features.md

@@ -53,9 +53,16 @@ Log file locations vary by operating system:
 The desktop version of privacy.sexy enables direct script execution, providing a seamless and integrated experience.
 This direct execution capability isn't available in the web version due to inherent browser restrictions.
 
+**Logging and storage:**
+
 For enhanced auditability and easier troubleshooting, the desktop version keeps a record of executed scripts in designated directories.
 These locations vary based on the operating system:
 
 - macOS: `$HOME/Library/Application Support/privacy.sexy/runs`
 - Linux: `$HOME/.config/privacy.sexy/runs`
 - Windows: `%APPDATA%\privacy.sexy\runs`
+
+**Native file system dialogs:**
+
+The desktop version uses native system file save dialogs, offering more features and reliability compared to the browser's file system dialogs.
+These native dialogs provide a more integrated and user-friendly experience, aligning with the operating system's standard interface and functionalities.

src/infrastructure/Dialog/Browser/BrowserDialog.ts

@@ -0,0 +1,19 @@
+import { Dialog, FileType } from '@/presentation/common/Dialog';
+import { FileSaverDialog } from './FileSaverDialog';
+import { BrowserSaveFileDialog } from './BrowserSaveFileDialog';
+
+export class BrowserDialog implements Dialog {
+  constructor(private readonly saveFileDialog: BrowserSaveFileDialog = new FileSaverDialog()) {
+
+  }
+
+  public saveFile(
+    fileContents: string,
+    fileName: string,
+    type: FileType,
+  ): Promise<void> {
+    return Promise.resolve(
+      this.saveFileDialog.saveFile(fileContents, fileName, type),
+    );
+  }
+}

src/infrastructure/Dialog/Browser/BrowserSaveFileDialog.ts

@@ -0,0 +1,9 @@
+import { FileType } from '@/presentation/common/Dialog';
+
+export interface BrowserSaveFileDialog {
+  saveFile(
+    fileContents: string,
+    fileName: string,
+    fileType: FileType,
+  ): void;
+}

src/infrastructure/Dialog/Browser/FileSaverDialog.ts

@@ -0,0 +1,39 @@
+import fileSaver from 'file-saver';
+import { FileType } from '@/presentation/common/Dialog';
+import { BrowserSaveFileDialog } from './BrowserSaveFileDialog';
+
+export type SaveAsFunction = (data: Blob, filename?: string) => void;
+
+export type WindowOpenFunction = (url: string, target: string, features: string) => void;
+
+export class FileSaverDialog implements BrowserSaveFileDialog {
+  constructor(
+    private readonly fileSaverSaveAs: SaveAsFunction = fileSaver.saveAs,
+    private readonly windowOpen: WindowOpenFunction = window.open.bind(window),
+  ) { }
+
+  public saveFile(
+    fileContents: string,
+    fileName: string,
+    fileType: FileType,
+  ): void {
+    const mimeType = MimeTypes[fileType];
+    this.saveBlob(fileContents, mimeType, fileName);
+  }
+
+  private saveBlob(file: BlobPart, mimeType: string, fileName: string): void {
+    try {
+      const blob = new Blob([file], { type: mimeType });
+      this.fileSaverSaveAs(blob, fileName);
+    } catch (e) {
+      this.windowOpen(`data:${mimeType},${encodeURIComponent(file.toString())}`, '_blank', '');
+    }
+  }
+}
+
+const MimeTypes: Record<FileType, string> = {
+  // Some browsers (including firefox + IE) require right mime type
+  // otherwise they ignore extension and save the file as text.
+  [FileType.BatchFile]: 'application/bat', // https://en.wikipedia.org/wiki/Batch_file
+  [FileType.ShellScript]: 'text/x-shellscript', // https://de.wikipedia.org/wiki/Shellskript#MIME-Typ
+} as const;

src/infrastructure/Dialog/Electron/ElectronDialog.ts

@@ -0,0 +1,17 @@
+import { Dialog, FileType } from '@/presentation/common/Dialog';
+import { NodeElectronSaveFileDialog } from './NodeElectronSaveFileDialog';
+import { ElectronSaveFileDialog } from './ElectronSaveFileDialog';
+
+export class ElectronDialog implements Dialog {
+  constructor(
+    private readonly fileSaveDialog: ElectronSaveFileDialog = new NodeElectronSaveFileDialog(),
+  ) { }
+
+  public async saveFile(
+    fileContents: string,
+    fileName: string,
+    type: FileType,
+  ): Promise<void> {
+    await this.fileSaveDialog.saveFile(fileContents, fileName, type);
+  }
+}

src/infrastructure/Dialog/Electron/ElectronSaveFileDialog.ts

@@ -0,0 +1,9 @@
+import { FileType } from '@/presentation/common/Dialog';
+
+export interface ElectronSaveFileDialog {
+  saveFile(
+    fileContents: string,
+    fileName: string,
+    type: FileType,
+  ): Promise<void>;
+}

src/infrastructure/Dialog/Electron/NodeElectronSaveFileDialog.ts

@@ -0,0 +1,98 @@
+import { join } from 'node:path';
+import { writeFile } from 'node:fs/promises';
+import { app, dialog } from 'electron/main';
+import { Logger } from '@/application/Common/Log/Logger';
+import { ElectronLogger } from '@/infrastructure/Log/ElectronLogger';
+import { FileType } from '@/presentation/common/Dialog';
+import { ElectronSaveFileDialog } from './ElectronSaveFileDialog';
+
+export interface ElectronFileDialogOperations {
+  getUserDownloadsPath(): string;
+  showSaveDialog(options: Electron.SaveDialogOptions): Promise<Electron.SaveDialogReturnValue>;
+}
+
+export interface NodeFileOperations {
+  readonly join: typeof join;
+  writeFile(file: string, data: string): Promise<void>;
+}
+
+export class NodeElectronSaveFileDialog implements ElectronSaveFileDialog {
+  constructor(
+    private readonly logger: Logger = ElectronLogger,
+    private readonly electron: ElectronFileDialogOperations = {
+      getUserDownloadsPath: () => app.getPath('downloads'),
+      showSaveDialog: dialog.showSaveDialog.bind(dialog),
+    },
+    private readonly node: NodeFileOperations = {
+      join,
+      writeFile,
+    },
+  ) { }
+
+  public async saveFile(
+    fileContents: string,
+    fileName: string,
+    type: FileType,
+  ): Promise<void> {
+    const userSelectedFilePath = await this.showSaveFileDialog(fileName, type);
+    if (!userSelectedFilePath) {
+      this.logger.info(`File save cancelled by user: ${fileName}`);
+      return;
+    }
+    await this.writeFile(userSelectedFilePath, fileContents);
+  }
+
+  private async writeFile(filePath: string, fileContents: string): Promise<void> {
+    try {
+      this.logger.info(`Saving file: ${filePath}`);
+      await this.node.writeFile(filePath, fileContents);
+      this.logger.info(`File saved: ${filePath}`);
+    } catch (error) {
+      this.logger.error(`Error saving file: ${error.message}`);
+    }
+  }
+
+  private async showSaveFileDialog(fileName: string, type: FileType): Promise<string | undefined> {
+    const downloadsFolder = this.electron.getUserDownloadsPath();
+    const defaultFilePath = this.node.join(downloadsFolder, fileName);
+    const dialogResult = await this.electron.showSaveDialog({
+      title: fileName,
+      defaultPath: defaultFilePath,
+      filters: getDialogFileFilters(type),
+      properties: [
+        'createDirectory', // Enables directory creation on macOS.
+        'showOverwriteConfirmation', // Shows overwrite confirmation on Linux.
+      ],
+    });
+    if (dialogResult.canceled) {
+      return undefined;
+    }
+    return dialogResult.filePath;
+  }
+}
+
+function getDialogFileFilters(fileType: FileType): Electron.FileFilter[] {
+  const filters = FileTypeSpecificFilters[fileType];
+  return [
+    ...filters,
+    {
+      name: 'All Files',
+      extensions: ['*'],
+    },
+  ];
+}
+
+const FileTypeSpecificFilters: Record<FileType, Electron.FileFilter[]> = {
+  [FileType.BatchFile]: [
+    {
+      name: 'Batch Files',
+      extensions: ['bat', 'cmd'],
+    },
+  ],
+  [FileType.ShellScript]: [
+    {
+      name: 'Shell Scripts',
+      extensions: ['sh', 'bash', 'zsh'],
+    },
+  ],
+};

src/infrastructure/RuntimeEnvironment/Browser/BrowserOs/BrowserConditions.ts

@@ -84,4 +84,23 @@ export const BrowserConditions: readonly BrowserCondition[] = [
     notExistingPartsInUserAgent: ['like Mac OS X'], // Eliminate iOS and iPadOS for Safari
     touchSupport: TouchSupportExpectation.MustNotExist, // Distinguish from iPadOS for Safari
   },
+  ...generateJsdomBrowserConditions(),
 ] as const;
+
+function generateJsdomBrowserConditions(): readonly BrowserCondition[] {
+  // jsdom user agent format: `Mozilla/5.0 (${process.platform || "unknown OS"}) ...` (https://archive.ph/2023.02.14-193200/https://github.com/jsdom/jsdom#advanced-configuration)
+  const operatingSystemPlatformMap: Partial<Record<
+  OperatingSystem,
+  NodeJS.Platform> // Enforce right platform constants at compile time
+  > = {
+    [OperatingSystem.Linux]: 'linux',
+    [OperatingSystem.Windows]: 'win32',
+    [OperatingSystem.macOS]: 'darwin',
+  } as const;
+  return Object
+    .entries(operatingSystemPlatformMap)
+    .map(([operatingSystemKey, platformString]): BrowserCondition => ({
+      operatingSystem: Number(operatingSystemKey),
+      existingPartsInSameUserAgent: ['jsdom', platformString],
+    }));
+}

src/infrastructure/RuntimeEnvironment/Browser/BrowserRuntimeEnvironment.ts

@@ -1,5 +1,4 @@
 import { OperatingSystem } from '@/domain/OperatingSystem';
-import { WindowVariables } from '@/infrastructure/WindowVariables/WindowVariables';
 import { IEnvironmentVariables } from '@/infrastructure/EnvironmentVariables/IEnvironmentVariables';
 import { EnvironmentVariablesFactory } from '@/infrastructure/EnvironmentVariables/EnvironmentVariablesFactory';
 import { RuntimeEnvironment } from '../RuntimeEnvironment';
@@ -8,7 +7,7 @@ import { BrowserEnvironment, BrowserOsDetector } from './BrowserOs/BrowserOsDete
 import { isTouchEnabledDevice } from './TouchSupportDetection';
 
 export class BrowserRuntimeEnvironment implements RuntimeEnvironment {
-  public readonly isDesktop: boolean;
+  public readonly isRunningAsDesktopApplication: boolean;
 
   public readonly os: OperatingSystem | undefined;
 
@@ -18,31 +17,34 @@ export class BrowserRuntimeEnvironment implements RuntimeEnvironment {
     window: Partial<Window>,
     environmentVariables: IEnvironmentVariables = EnvironmentVariablesFactory.Current.instance,
     browserOsDetector: BrowserOsDetector = new ConditionBasedOsDetector(),
-    touchDetector = isTouchEnabledDevice,
+    touchDetector: TouchDetector = isTouchEnabledDevice,
   ) {
     if (!window) { throw new Error('missing window'); } // do not trust strictNullChecks for global objects
     this.isNonProduction = environmentVariables.isNonProduction;
-    this.isDesktop = isDesktop(window);
-    if (this.isDesktop) {
-      this.os = window?.os;
-    } else {
-      this.os = undefined;
-      const userAgent = getUserAgent(window);
-      if (userAgent) {
+    this.isRunningAsDesktopApplication = isElectronRendererProcess(window);
+    this.os = determineOperatingSystem(window, touchDetector, browserOsDetector);
+  }
+}
+
+function isElectronRendererProcess(globalWindow: Partial<Window>): boolean {
+  return globalWindow.isRunningAsDesktopApplication === true; // Preloader injects this
+  // We could also do `globalWindow?.navigator?.userAgent?.includes('Electron') === true;`
+}
+
+function determineOperatingSystem(
+  globalWindow: Partial<Window>,
+  touchDetector: TouchDetector,
+  browserOsDetector: BrowserOsDetector,
+): OperatingSystem | undefined {
+  const userAgent = globalWindow?.navigator?.userAgent;
+  if (!userAgent) {
+    return undefined;
+  }
   const browserEnvironment: BrowserEnvironment = {
     userAgent,
     isTouchSupported: touchDetector(),
   };
-        this.os = browserOsDetector.detect(browserEnvironment);
-      }
-    }
-  }
+  return browserOsDetector.detect(browserEnvironment);
 }
 
-function getUserAgent(window: Partial<Window>): string | undefined {
-  return window?.navigator?.userAgent;
-}
-
-function isDesktop(window: Partial<WindowVariables>): boolean {
-  return window?.isDesktop === true;
-}
+type TouchDetector = () => boolean;

src/infrastructure/RuntimeEnvironment/Node/NodeRuntimeEnvironment.ts

@@ -3,7 +3,7 @@ import { RuntimeEnvironment } from '../RuntimeEnvironment';
 import { convertPlatformToOs } from './NodeOsMapper';
 
 export class NodeRuntimeEnvironment implements RuntimeEnvironment {
-  public readonly isDesktop: boolean;
+  public readonly isRunningAsDesktopApplication: boolean;
 
   public readonly os: OperatingSystem | undefined;
 
@@ -14,7 +14,7 @@ export class NodeRuntimeEnvironment implements RuntimeEnvironment {
     convertToOs: PlatformToOperatingSystemConverter = convertPlatformToOs,
   ) {
     if (!nodeProcess) { throw new Error('missing process'); } // do not trust strictNullChecks for global objects
-    this.isDesktop = true;
+    this.isRunningAsDesktopApplication = true;
     this.os = convertToOs(nodeProcess.platform);
     this.isNonProduction = nodeProcess.env.NODE_ENV !== 'production'; // populated by Vite
   }

src/infrastructure/RuntimeEnvironment/RuntimeEnvironment.ts

@@ -1,7 +1,7 @@
 import { OperatingSystem } from '@/domain/OperatingSystem';
 
 export interface RuntimeEnvironment {
-  readonly isDesktop: boolean;
+  readonly isRunningAsDesktopApplication: boolean;
   readonly os: OperatingSystem | undefined;
   readonly isNonProduction: boolean;
 }

src/infrastructure/RuntimeEnvironment/RuntimeEnvironmentFactory.ts

@@ -3,32 +3,47 @@ import { NodeRuntimeEnvironment } from './Node/NodeRuntimeEnvironment';
 import { RuntimeEnvironment } from './RuntimeEnvironment';
 
 export const CurrentEnvironment = determineAndCreateRuntimeEnvironment({
-  getGlobalWindow: () => globalThis.window,
-  getGlobalProcess: () => globalThis.process,
+  window: globalThis.window,
+  process: globalThis.process,
 });
 
 export function determineAndCreateRuntimeEnvironment(
-  globalAccessor: GlobalAccessor,
+  globalAccessor: GlobalPropertiesAccessor,
   browserEnvironmentFactory: BrowserRuntimeEnvironmentFactory = (
     window,
   ) => new BrowserRuntimeEnvironment(window),
-  nodeEnvironmentFactory: NodeRuntimeEnvironmentFactory = () => new NodeRuntimeEnvironment(),
+  nodeEnvironmentFactory: NodeRuntimeEnvironmentFactory = (
+    process: NodeJS.Process,
+  ) => new NodeRuntimeEnvironment(process),
 ): RuntimeEnvironment {
-  if (globalAccessor.getGlobalProcess()) {
-    return nodeEnvironmentFactory();
+  if (isElectronMainProcess(globalAccessor.process)) {
+    return nodeEnvironmentFactory(globalAccessor.process);
+  }
+  const { window } = globalAccessor;
+  if (!window) {
+    throw new Error('Unsupported runtime environment: The current context is neither a recognized browser nor a desktop environment.');
   }
-  const window = globalAccessor.getGlobalWindow();
-  if (window) {
   return browserEnvironmentFactory(window);
+}
+
+function isElectronMainProcess(
+  nodeProcess: NodeJS.Process | undefined,
+): nodeProcess is NodeJS.Process {
+  // Electron populates `nodeProcess.versions.electron` with its version, see https://web.archive.org/web/20240113162837/https://www.electronjs.org/docs/latest/api/process#processversionselectron-readonly.
+  if (!nodeProcess) {
+    return false;
   }
-  throw new Error('Unsupported runtime environment: The current context is neither a recognized browser nor a Node.js environment.');
+  if (nodeProcess.versions.electron) {
+    return true;
+  }
+  return false;
 }
 
 export type BrowserRuntimeEnvironmentFactory = (window: Window) => RuntimeEnvironment;
 
-export type NodeRuntimeEnvironmentFactory = () => NodeRuntimeEnvironment;
+export type NodeRuntimeEnvironmentFactory = (process: NodeJS.Process) => NodeRuntimeEnvironment;
 
-export interface GlobalAccessor {
-  getGlobalWindow(): Window | undefined;
-  getGlobalProcess(): NodeJS.Process | undefined;
+export interface GlobalPropertiesAccessor {
+  readonly window: Window | undefined;
+  readonly process: NodeJS.Process | undefined;
 }

src/infrastructure/SaveFileDialog.ts

@@ -1,33 +0,0 @@
-import fileSaver from 'file-saver';
-
-export enum FileType {
-  BatchFile,
-  ShellScript,
-}
-
-export class SaveFileDialog {
-  public static saveFile(
-    text: string,
-    fileName: string,
-    type: FileType,
-  ): void {
-    const mimeType = this.mimeTypes[type];
-    this.saveBlob(text, mimeType, fileName);
-  }
-
-  private static readonly mimeTypes: Record<FileType, string> = {
-    // Some browsers (including firefox + IE) require right mime type
-    // otherwise they ignore extension and save the file as text.
-    [FileType.BatchFile]: 'application/bat', // https://en.wikipedia.org/wiki/Batch_file
-    [FileType.ShellScript]: 'text/x-shellscript', // https://de.wikipedia.org/wiki/Shellskript#MIME-Typ
-  };
-
-  private static saveBlob(file: BlobPart, fileType: string, fileName: string): void {
-    try {
-      const blob = new Blob([file], { type: fileType });
-      fileSaver.saveAs(blob, fileName);
-    } catch (e) {
-      window.open(`data:${fileType},${encodeURIComponent(file.toString())}`, '_blank', '');
-    }
-  }
-}

src/infrastructure/WindowVariables/WindowVariables.ts

@@ -1,11 +1,13 @@
 import { OperatingSystem } from '@/domain/OperatingSystem';
 import { Logger } from '@/application/Common/Log/Logger';
 import { CodeRunner } from '@/application/CodeRunner/CodeRunner';
+import { Dialog } from '@/presentation/common/Dialog';
 
 /* Primary entry point for platform-specific injections */
 export interface WindowVariables {
-  readonly isDesktop: boolean;
+  readonly isRunningAsDesktopApplication?: true;
   readonly codeRunner?: CodeRunner;
   readonly os?: OperatingSystem;
-  readonly log: Logger;
+  readonly log?: Logger;
+  readonly dialog?: Dialog;
 }

src/infrastructure/WindowVariables/WindowVariablesValidator.ts

@@ -18,13 +18,14 @@ export function validateWindowVariables(variables: Partial<WindowVariables>) {
 }
 
 function* testEveryProperty(variables: Partial<WindowVariables>): Iterable<string> {
-  const tests: {
-    [K in PropertyKeys<Required<WindowVariables>>]: boolean;
-  } = {
+  const tests: Record<PropertyKeys<Required<WindowVariables>>, boolean> = {
     os: testOperatingSystem(variables.os),
-    isDesktop: testIsDesktop(variables.isDesktop),
+    isRunningAsDesktopApplication: testIsRunningAsDesktopApplication(
+      variables.isRunningAsDesktopApplication,
+    ),
     codeRunner: testCodeRunner(variables),
     log: testLogger(variables),
+    dialog: testDialog(variables),
   };
 
   for (const [propertyName, testResult] of Object.entries(tests)) {
@@ -48,23 +49,30 @@ function testOperatingSystem(os: unknown): boolean {
 }
 
 function testLogger(variables: Partial<WindowVariables>): boolean {
-  if (!variables.isDesktop) {
+  if (!variables.isRunningAsDesktopApplication) {
     return true;
   }
   return isPlainObject(variables.log);
 }
 
 function testCodeRunner(variables: Partial<WindowVariables>): boolean {
-  if (!variables.isDesktop) {
+  if (!variables.isRunningAsDesktopApplication) {
     return true;
   }
   return isPlainObject(variables.codeRunner)
     && isFunction(variables.codeRunner.runCode);
 }
 
-function testIsDesktop(isDesktop: unknown): boolean {
-  if (isDesktop === undefined) {
+function testIsRunningAsDesktopApplication(isRunningAsDesktopApplication: unknown): boolean {
+  if (isRunningAsDesktopApplication === undefined) {
     return true;
   }
-  return isBoolean(isDesktop);
+  return isBoolean(isRunningAsDesktopApplication);
+}
+
+function testDialog(variables: Partial<WindowVariables>): boolean {
+  if (!variables.isRunningAsDesktopApplication) {
+    return true;
+  }
+  return isPlainObject(variables.dialog);
 }

src/presentation/bootstrapping/DependencyProvider.ts

@@ -11,9 +11,10 @@ import {
 } from '@/presentation/injectionSymbols';
 import { PropertyKeys } from '@/TypeHelpers';
 import { useUserSelectionState } from '@/presentation/components/Shared/Hooks/UseUserSelectionState';
-import { useLogger } from '@/presentation/components/Shared/Hooks/UseLogger';
+import { useLogger } from '@/presentation/components/Shared/Hooks/Log/UseLogger';
 import { useCodeRunner } from '@/presentation/components/Shared/Hooks/UseCodeRunner';
 import { CurrentEnvironment } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironmentFactory';
+import { useDialog } from '@/presentation/components/Shared/Hooks/Dialog/UseDialog';
 
 export function provideDependencies(
   context: IApplicationContext,
@@ -67,6 +68,10 @@ export function provideDependencies(
       InjectionKeys.useCodeRunner,
       useCodeRunner,
     ),
+    useDialog: (di) => di.provide(
+      InjectionKeys.useDialog,
+      useDialog,
+    ),
   };
   registerAll(Object.values(resolvers), api);
 }

src/presentation/bootstrapping/Modules/AppInitializationLogger.ts

@@ -1,6 +1,6 @@
 import { Logger } from '@/application/Common/Log/Logger';
+import { ClientLoggerFactory } from '@/presentation/components/Shared/Hooks/Log/ClientLoggerFactory';
 import { Bootstrapper } from '../Bootstrapper';
-import { ClientLoggerFactory } from '../ClientLoggerFactory';
 
 export class AppInitializationLogger implements Bootstrapper {
   constructor(

src/presentation/common/Dialog.ts

@@ -0,0 +1,8 @@
+export interface Dialog {
+  saveFile(fileContents: string, fileName: string, type: FileType): Promise<void>;
+}
+
+export enum FileType {
+  BatchFile,
+  ShellScript,
+}

src/presentation/components/Code/CodeButtons/CodeRunButton.vue

@@ -19,10 +19,14 @@ export default defineComponent({
   },
   setup() {
     const { currentState, currentContext } = injectKey((keys) => keys.useCollectionState);
-    const { os, isDesktop } = injectKey((keys) => keys.useRuntimeEnvironment);
+    const { os, isRunningAsDesktopApplication } = injectKey((keys) => keys.useRuntimeEnvironment);
     const { codeRunner } = injectKey((keys) => keys.useCodeRunner);
 
-    const canRun = computed<boolean>(() => getCanRunState(currentState.value.os, isDesktop, os));
+    const canRun = computed<boolean>(() => getCanRunState(
+      currentState.value.os,
+      isRunningAsDesktopApplication,
+      os,
+    ));
 
     async function executeCode() {
       if (!codeRunner) { throw new Error('missing code runner'); }
@@ -33,7 +37,6 @@ export default defineComponent({
     }
 
     return {
-      isDesktopVersion: isDesktop,
       canRun,
       executeCode,
     };
@@ -42,10 +45,10 @@ export default defineComponent({
 
 function getCanRunState(
   selectedOs: OperatingSystem,
-  isDesktopVersion: boolean,
+  isRunningAsDesktopApplication: boolean,
   hostOs: OperatingSystem | undefined,
 ): boolean {
   const isRunningOnSelectedOs = selectedOs === hostOs;
-  return isDesktopVersion && isRunningOnSelectedOs;
+  return isRunningAsDesktopApplication && isRunningOnSelectedOs;
 }
 </script>

src/presentation/components/Code/CodeButtons/Save/CodeSaveButton.vue

@@ -1,8 +1,8 @@
 <template>
   <div>
     <IconButton
-      :text="isDesktopVersion ? 'Save' : 'Download'"
-      :icon-name="isDesktopVersion ? 'floppy-disk' : 'file-arrow-down'"
+      :text="isRunningAsDesktopApplication ? 'Save' : 'Download'"
+      :icon-name="isRunningAsDesktopApplication ? 'floppy-disk' : 'file-arrow-down'"
       @click="saveCode"
     />
     <ModalDialog v-if="instructions" v-model="areInstructionsVisible">
@@ -16,12 +16,11 @@ import {
   defineComponent, ref, computed,
 } from 'vue';
 import { injectKey } from '@/presentation/injectionSymbols';
-import { SaveFileDialog, FileType } from '@/infrastructure/SaveFileDialog';
 import ModalDialog from '@/presentation/components/Shared/Modal/ModalDialog.vue';
-import { IReadOnlyCategoryCollectionState } from '@/application/Context/State/ICategoryCollectionState';
 import { ScriptingLanguage } from '@/domain/ScriptingLanguage';
 import { IScriptingDefinition } from '@/domain/IScriptingDefinition';
 import { ScriptFileName } from '@/application/CodeRunner/ScriptFileName';
+import { FileType } from '@/presentation/common/Dialog';
 import IconButton from '../IconButton.vue';
 import InstructionList from './Instructions/InstructionList.vue';
 import { IInstructionListData } from './Instructions/InstructionListData';
@@ -35,7 +34,8 @@ export default defineComponent({
   },
   setup() {
     const { currentState } = injectKey((keys) => keys.useCollectionState);
-    const { isDesktop } = injectKey((keys) => keys.useRuntimeEnvironment);
+    const { isRunningAsDesktopApplication } = injectKey((keys) => keys.useRuntimeEnvironment);
+    const { dialog } = injectKey((keys) => keys.useDialog);
 
     const areInstructionsVisible = ref(false);
     const fileName = computed<string>(() => buildFileName(currentState.value.collection.scripting));
@@ -44,13 +44,17 @@ export default defineComponent({
       fileName.value,
     ));
 
-    function saveCode() {
-      saveCodeToDisk(fileName.value, currentState.value);
+    async function saveCode() {
+      await dialog.saveFile(
+        currentState.value.code.current,
+        fileName.value,
+        getType(currentState.value.collection.scripting.language),
+      );
       areInstructionsVisible.value = true;
     }
 
     return {
-      isDesktopVersion: isDesktop,
+      isRunningAsDesktopApplication,
       instructions,
       fileName,
       areInstructionsVisible,
@@ -59,12 +63,6 @@ export default defineComponent({
   },
 });
 
-function saveCodeToDisk(fileName: string, state: IReadOnlyCategoryCollectionState) {
-  const content = state.code.current;
-  const type = getType(state.collection.scripting.language);
-  SaveFileDialog.saveFile(content, fileName, type);
-}
-
 function getType(language: ScriptingLanguage) {
   switch (language) {
     case ScriptingLanguage.batchfile:

src/presentation/components/Code/TheCodeArea.vue

@@ -188,6 +188,7 @@ function getDefaultCode(language: ScriptingLanguage): string {
     .appendCommentLine(' ✔️ No need to run any compiled software on your system, just run the generated scripts.')
     .appendCommentLine(' ✔️ Have full visibility into what the tweaks do as you enable them.')
     .appendCommentLine(' ✔️ Open-source and free (both free as in beer and free as in speech).')
+    .appendCommentLine(' ✔️ Committed to your safety with strong security measures.')
     .toString();
 }
 

src/presentation/components/Shared/Hooks/Dialog/ClientDialogFactory.ts

@@ -0,0 +1,25 @@
+import { RuntimeEnvironment } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironment';
+import { Dialog } from '@/presentation/common/Dialog';
+import { BrowserDialog } from '@/infrastructure/Dialog/Browser/BrowserDialog';
+
+export function determineDialogBasedOnEnvironment(
+  environment: RuntimeEnvironment,
+  windowInjectedDialogFactory: WindowDialogCreationFunction = () => globalThis.window.dialog,
+  browserDialogFactory: BrowserDialogCreationFunction = () => new BrowserDialog(),
+): Dialog {
+  if (!environment.isRunningAsDesktopApplication) {
+    return browserDialogFactory();
+  }
+  const dialog = windowInjectedDialogFactory();
+  if (!dialog) {
+    throw new Error([
+      'The Dialog API could not be retrieved from the window object.',
+      'This may indicate that the Dialog API is either not implemented or not correctly exposed in the current desktop environment.',
+    ].join('\n'));
+  }
+  return dialog;
+}
+
+export type WindowDialogCreationFunction = () => Dialog | undefined;
+
+export type BrowserDialogCreationFunction = () => Dialog;

src/presentation/components/Shared/Hooks/Dialog/UseDialog.ts

@@ -0,0 +1,14 @@
+import { Dialog } from '@/presentation/common/Dialog';
+import { CurrentEnvironment } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironmentFactory';
+import { determineDialogBasedOnEnvironment } from './ClientDialogFactory';
+
+export function useDialog(
+  factory: DialogFactory = () => determineDialogBasedOnEnvironment(CurrentEnvironment),
+) {
+  const dialog = factory();
+  return {
+    dialog,
+  };
+}
+
+export type DialogFactory = () => Dialog;

src/presentation/components/Shared/Hooks/Log/ClientLoggerFactory.ts

@@ -1,10 +1,10 @@
 import { RuntimeEnvironment } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironment';
 import { ConsoleLogger } from '@/infrastructure/Log/ConsoleLogger';
 import { Logger } from '@/application/Common/Log/Logger';
-import { LoggerFactory } from '@/application/Common/Log/LoggerFactory';
 import { NoopLogger } from '@/infrastructure/Log/NoopLogger';
 import { WindowInjectedLogger } from '@/infrastructure/Log/WindowInjectedLogger';
 import { CurrentEnvironment } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironmentFactory';
+import { LoggerFactory } from './LoggerFactory';
 
 export class ClientLoggerFactory implements LoggerFactory {
   public static readonly Current: LoggerFactory = new ClientLoggerFactory();
@@ -22,7 +22,7 @@ export class ClientLoggerFactory implements LoggerFactory {
       this.logger = noopLoggerFactory(); // keep the test outputs clean
       return;
     }
-    if (environment.isDesktop) {
+    if (environment.isRunningAsDesktopApplication) {
       this.logger = windowInjectedLoggerFactory();
       return;
     }
@@ -49,5 +49,5 @@ function isUnitOrIntegrationTests(
     the global window object. If we're in a desktop (Node) environment and the logger isn't
     injected, it indicates a testing environment.
   */
-  return environment.isDesktop && !windowAccessor()?.log;
+  return environment.isRunningAsDesktopApplication && !windowAccessor()?.log;
 }

src/presentation/components/Shared/Hooks/Log/UseLogger.ts

@@ -0,0 +1,8 @@
+import { ClientLoggerFactory } from './ClientLoggerFactory';
+import { LoggerFactory } from './LoggerFactory';
+
+export function useLogger(factory: LoggerFactory = ClientLoggerFactory.Current) {
+  return {
+    log: factory.logger,
+  };
+}

src/presentation/components/Shared/Hooks/UseLogger.ts

@@ -1,8 +0,0 @@
-import { LoggerFactory } from '@/application/Common/Log/LoggerFactory';
-import { ClientLoggerFactory } from '@/presentation/bootstrapping/ClientLoggerFactory';
-
-export function useLogger(factory: LoggerFactory = ClientLoggerFactory.Current) {
-  return {
-    log: factory.logger,
-  };
-}

src/presentation/components/TheFooter/PrivacyPolicy.vue

@@ -1,12 +1,12 @@
 <template>
   <div class="privacy-policy">
-    <div v-if="!isDesktop" class="line">
+    <div v-if="!isRunningAsDesktopApplication" class="line">
       <div class="line__emoji">
         🚫🍪
       </div>
       <div>No cookies!</div>
     </div>
-    <div v-if="isDesktop" class="line">
+    <div v-if="isRunningAsDesktopApplication" class="line">
       <div class="line__emoji">
         🚫🌐
       </div>
@@ -30,7 +30,7 @@
         of the <a :href="repositoryUrl" target="_blank" rel="noopener noreferrer">source code</a> with no changes.
       </div>
     </div>
-    <div v-if="!isDesktop" class="line">
+    <div v-if="!isRunningAsDesktopApplication" class="line">
       <div class="line__emoji">
         📈
       </div>
@@ -60,7 +60,7 @@ import { injectKey } from '@/presentation/injectionSymbols';
 export default defineComponent({
   setup() {
     const { info } = injectKey((keys) => keys.useApplication);
-    const { isDesktop } = injectKey((keys) => keys.useRuntimeEnvironment);
+    const { isRunningAsDesktopApplication } = injectKey((keys) => keys.useRuntimeEnvironment);
 
     const repositoryUrl = computed<string>(() => info.repositoryUrl);
     const feedbackUrl = computed<string>(() => info.feedbackUrl);
@@ -68,7 +68,7 @@ export default defineComponent({
     return {
       repositoryUrl,
       feedbackUrl,
-      isDesktop,
+      isRunningAsDesktopApplication,
     };
   },
 });

src/presentation/components/TheFooter/TheFooter.vue

@@ -2,7 +2,7 @@
   <div>
     <div class="footer">
       <div class="footer__section">
-        <span v-if="isDesktop" class="footer__section__item">
+        <span v-if="isRunningAsDesktopApplication" class="footer__section__item">
           <AppIcon class="icon" icon="globe" />
           <span>
             Online version at <a :href="homepageUrl" target="_blank" rel="noopener noreferrer">{{ homepageUrl }}</a>
@@ -68,7 +68,7 @@ export default defineComponent({
   },
   setup() {
     const { info } = injectKey((keys) => keys.useApplication);
-    const { isDesktop } = injectKey((keys) => keys.useRuntimeEnvironment);
+    const { isRunningAsDesktopApplication } = injectKey((keys) => keys.useRuntimeEnvironment);
 
     const isPrivacyDialogVisible = ref(false);
 
@@ -87,7 +87,7 @@ export default defineComponent({
     }
 
     return {
-      isDesktop,
+      isRunningAsDesktopApplication,
       isPrivacyDialogVisible,
       showPrivacyDialog,
       version,

src/presentation/electron/main/IpcRegistration.ts

@@ -1,24 +1,37 @@
 import { ScriptFileCodeRunner } from '@/infrastructure/CodeRunner/ScriptFileCodeRunner';
 import { CodeRunner } from '@/application/CodeRunner/CodeRunner';
+import { Dialog } from '@/presentation/common/Dialog';
+import { ElectronDialog } from '@/infrastructure/Dialog/Electron/ElectronDialog';
+import { IpcChannel } from '@/presentation/electron/shared/IpcBridging/IpcChannel';
 import { registerIpcChannel } from '../shared/IpcBridging/IpcProxy';
-import { IpcChannelDefinitions } from '../shared/IpcBridging/IpcChannelDefinitions';
+import { ChannelDefinitionKey, IpcChannelDefinitions } from '../shared/IpcBridging/IpcChannelDefinitions';
 
 export function registerAllIpcChannels(
   createCodeRunner: CodeRunnerFactory = () => new ScriptFileCodeRunner(),
-  registrar: IpcRegistrar = registerIpcChannel,
+  createDialog: DialogFactory = () => new ElectronDialog(),
+  registrar: IpcChannelRegistrar = registerIpcChannel,
 ) {
-  const registrars: Record<keyof typeof IpcChannelDefinitions, () => void> = {
-    CodeRunner: () => registrar(IpcChannelDefinitions.CodeRunner, createCodeRunner()),
+  const ipcInstanceCreators: IpcChannelRegistrars = {
+    CodeRunner: () => createCodeRunner(),
+    Dialog: () => createDialog(),
   };
-  Object.entries(registrars).forEach(([name, register]) => {
+  Object.entries(ipcInstanceCreators).forEach(([name, instanceFactory]) => {
     try {
-      register();
+      const definition = IpcChannelDefinitions[name];
+      const instance = instanceFactory();
+      registrar(definition, instance);
     } catch (err) {
-      throw new AggregateError(`main: Failed to register IPC channel "${name}"`, err);
+      throw new AggregateError([err], `main: Failed to register IPC channel "${name}":\n${err.message}`);
     }
   });
 }
 
 export type CodeRunnerFactory = () => CodeRunner;
+export type DialogFactory = () => Dialog;
+export type IpcChannelRegistrar = typeof registerIpcChannel;
 
-export type IpcRegistrar = typeof registerIpcChannel;
+type RegistrationChannel<T extends ChannelDefinitionKey> = (typeof IpcChannelDefinitions)[T];
+type ExtractChannelServiceType<T> = T extends IpcChannel<infer U> ? U : never;
+type IpcChannelRegistrars = {
+  [K in ChannelDefinitionKey]: () => ExtractChannelServiceType<RegistrationChannel<K>>;
+};

src/presentation/electron/preload/ContextBridging/RendererApiProvider.ts

@@ -12,14 +12,20 @@ export function provideWindowVariables(
   createApiFacade: ApiFacadeFactory = createSecureFacade,
   ipcConsumerCreator: IpcConsumerProxyCreator = createIpcConsumerProxy,
 ): WindowVariables {
-  return {
-    isDesktop: true,
+  // Enforces mandatory variable availability at compile time
+  const variables: RequiredWindowVariables = {
+    isRunningAsDesktopApplication: true,
     log: createApiFacade(createLogger(), ['info', 'debug', 'warn', 'error']),
     os: convertToOs(process.platform),
     codeRunner: ipcConsumerCreator(IpcChannelDefinitions.CodeRunner),
+    dialog: ipcConsumerCreator(IpcChannelDefinitions.Dialog),
   };
+  return variables;
 }
 
+type RequiredWindowVariables = PartiallyRequired<WindowVariables, 'os' /* | 'anotherOptionalKey'.. */>;
+type PartiallyRequired<T, K extends keyof T> = Required<Omit<T, K>> & Pick<T, K>;
+
 export type LoggerFactory = () => Logger;
 
 export type ApiFacadeFactory = typeof createSecureFacade;

src/presentation/electron/shared/IpcBridging/IpcChannelDefinitions.ts

@@ -1,11 +1,15 @@
 import { FunctionKeys } from '@/TypeHelpers';
 import { CodeRunner } from '@/application/CodeRunner/CodeRunner';
+import { Dialog } from '@/presentation/common/Dialog';
 import { IpcChannel } from './IpcChannel';
 
 export const IpcChannelDefinitions = {
   CodeRunner: defineElectronIpcChannel<CodeRunner>('code-run', ['runCode']),
+  Dialog: defineElectronIpcChannel<Dialog>('dialogs', ['saveFile']),
 } as const;
 
+export type ChannelDefinitionKey = keyof typeof IpcChannelDefinitions;
+
 function defineElectronIpcChannel<T>(
   name: string,
   functionNames: readonly FunctionKeys<T>[],

src/presentation/electron/shared/IpcBridging/IpcProxy.ts

@@ -1,6 +1,6 @@
 import { ipcMain } from 'electron/main';
 import { ipcRenderer } from 'electron/renderer';
-import { isFunction } from '@/TypeHelpers';
+import { FunctionKeys, isFunction } from '@/TypeHelpers';
 import { IpcChannel } from './IpcChannel';
 
 export function createIpcConsumerProxy<T>(
@@ -25,9 +25,7 @@ export function registerIpcChannel<T>(
 ) {
   channel.accessibleMembers.forEach((functionKey) => {
     const originalFunction = originalObject[functionKey];
-    if (!isFunction(originalFunction)) {
-      throw new Error('Non-function members are not yet supported');
-    }
+    validateIpcFunction(functionKey, originalFunction, channel);
     const ipcChannel = getIpcChannelIdentifier(channel.namespace, functionKey as string);
     electronIpcMain.handle(ipcChannel, (_event, ...args: unknown[]) => {
       return originalFunction.apply(originalObject, args);
@@ -35,6 +33,28 @@ export function registerIpcChannel<T>(
   });
 }
 
+function validateIpcFunction<T>(
+  functionKey: FunctionKeys<T>,
+  functionValue: T[FunctionKeys<T>],
+  channel: IpcChannel<T>,
+): asserts functionValue is T[FunctionKeys<T>] & ((...args: unknown[]) => unknown) {
+  const functionName = functionKey.toString();
+  if (functionValue === undefined) {
+    throwErrorWithContext(`The function "${functionName}" is not found on the target object.`);
+  }
+  if (!isFunction(functionValue)) {
+    throwErrorWithContext('Non-function members are not yet supported.');
+  }
+  function throwErrorWithContext(message: string): never {
+    throw new Error([
+      message,
+      `Channel: ${JSON.stringify(channel)}.`,
+      `Function key: ${functionName}.`,
+      `Value: ${JSON.stringify(functionValue)}`,
+    ].join('\n'));
+  }
+}
+
 function getIpcChannelIdentifier(namespace: string, key: string) {
   return `proxy:${namespace}:${key}`;
 }

src/presentation/injectionSymbols.ts

@@ -6,8 +6,9 @@ import type { useClipboard } from '@/presentation/components/Shared/Hooks/Clipbo
 import type { useCurrentCode } from '@/presentation/components/Shared/Hooks/UseCurrentCode';
 import type { useAutoUnsubscribedEvents } from '@/presentation/components/Shared/Hooks/UseAutoUnsubscribedEvents';
 import type { useUserSelectionState } from '@/presentation/components/Shared/Hooks/UseUserSelectionState';
-import type { useLogger } from '@/presentation/components/Shared/Hooks/UseLogger';
+import type { useLogger } from '@/presentation/components/Shared/Hooks/Log/UseLogger';
 import type { useCodeRunner } from './components/Shared/Hooks/UseCodeRunner';
+import type { useDialog } from './components/Shared/Hooks/Dialog/UseDialog';
 
 export const InjectionKeys = {
   useCollectionState: defineTransientKey<ReturnType<typeof useCollectionState>>('useCollectionState'),
@@ -19,6 +20,7 @@ export const InjectionKeys = {
   useUserSelectionState: defineTransientKey<ReturnType<typeof useUserSelectionState>>('useUserSelectionState'),
   useLogger: defineTransientKey<ReturnType<typeof useLogger>>('useLogger'),
   useCodeRunner: defineTransientKey<ReturnType<typeof useCodeRunner>>('useCodeRunner'),
+  useDialog: defineTransientKey<ReturnType<typeof useDialog>>('useDialog'),
 };
 
 export interface InjectionKeyWithLifetime<T> {

tests/integration/infrastructure/CodeRunner/ScriptFileCodeRunner.spec.ts

@@ -17,6 +17,7 @@ describe('ScriptFileCodeRunner', () => {
     const currentOperatingSystem = CurrentEnvironment.os;
     if (await shouldSkipTest(currentOperatingSystem)) {
       skip();
+      return;
     }
     const temporaryDirectoryProvider = createTemporaryDirectoryProvider();
     const codeRunner = createCodeRunner(temporaryDirectoryProvider);
@@ -61,10 +62,14 @@ function getPlatformSpecificArguments(
 function shouldSkipTest(
   os: OperatingSystem | undefined,
 ): Promise<boolean> {
-  return new Promise((resolve) => {
   if (os !== OperatingSystem.Linux) {
-      resolve(false);
+    return Promise.resolve(false);
   }
+  return isLinuxTerminalEmulatorSupported();
+}
+
+function isLinuxTerminalEmulatorSupported(): Promise<boolean> {
+  return new Promise((resolve) => {
     exec(`which ${LinuxTerminalEmulator}`).on('close', (exitCode) => {
       resolve(exitCode !== 0);
     });

tests/integration/infrastructure/RuntimeEnvironment/BrowserOs/BrowserOsTestCases.ts

@@ -39,6 +39,8 @@ export const BrowserOsTestCases: ReadonlyArray<BrowserOsTestCase> = [
       'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 UBrowser/6.0.1308.1016 Safari/537.36',
       // Electron:
       'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.5993.54 Electron/27.0.0 Safari/537.36',
+      // jsdom:
+      'Mozilla/5.0 (Windows) AppleWebKit/537.36 (KHTML, like Gecko) jsdom/22.1.0',
     ],
   }),
   ...createTests({
@@ -60,6 +62,8 @@ export const BrowserOsTestCases: ReadonlyArray<BrowserOsTestCase> = [
       'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 Edg/119.0.0.0',
       // Electron:
       'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.5993.54 Electron/27.0.0 Safari/537.36',
+      // jsdom:
+      'Mozilla/5.0 (darwin) AppleWebKit/537.36 (KHTML, like Gecko) jsdom/22.1.0',
     ],
   }),
   ...createTests({
@@ -74,6 +78,8 @@ export const BrowserOsTestCases: ReadonlyArray<BrowserOsTestCase> = [
       'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 Edg/115.0.1901.188',
       // Electron:
       'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.5993.54 Electron/27.0.0 Safari/537.36',
+      // jsdom:
+      'Mozilla/5.0 (linux) AppleWebKit/537.36 (KHTML, like Gecko) jsdom/22.1.0',
     ],
   }),
   ...createTests({

tests/integration/infrastructure/RuntimeEnvironment/RuntimeEnvironmentFactory.spec.ts

@@ -0,0 +1,23 @@
+import { describe, it, expect } from 'vitest';
+import { CurrentEnvironment } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironmentFactory';
+
+describe('RuntimeEnvironmentFactory', () => {
+  describe('CurrentEnvironment', () => {
+    it('identifies as browser in test environment', () => { // Ensures test independence from Electron IPC
+      // arrange
+      const expectedDesktopAppState = false;
+      // act
+      const isRunningAsDesktop = CurrentEnvironment.isRunningAsDesktopApplication;
+      // assert
+      expect(isRunningAsDesktop).to.equal(expectedDesktopAppState);
+    });
+    it('identifies as non-production in test environment', () => {
+      // arrange
+      const expectedNonProductionState = true;
+      // act
+      const isNonProductionEnvironment = CurrentEnvironment.isNonProduction;
+      // assert
+      expect(isNonProductionEnvironment).to.equal(expectedNonProductionState);
+    });
+  });
+});

tests/integration/presentation/bootstrapping/Modules/MobileSafariActivePseudoClassEnabler.spec.ts

@@ -29,7 +29,7 @@ describe('MobileSafariActivePseudoClassEnabler', () => {
           `User agent\t\t: ${navigator.userAgent}`,
           `Touch supported\t\t: ${supportsTouch}`,
           `Current OS\t\t: ${patchedEnvironment.os === undefined ? 'unknown' : OperatingSystem[patchedEnvironment.os]}`,
-          `Is desktop?\t\t: ${patchedEnvironment.isDesktop ? 'Yes (Desktop app)' : 'No (Browser)'}`,
+          `Is desktop?\t\t: ${patchedEnvironment.isRunningAsDesktopApplication ? 'Yes (Desktop app)' : 'No (Browser)'}`,
           `Listeners (${currentListeners.length})\t\t: ${JSON.stringify(currentListeners)}`,
         ]));
       });

tests/shared/bootstrap/BlobPolyfill.ts

@@ -0,0 +1,7 @@
+import { Blob as BlobPolyfill } from 'node:buffer';
+
+export function polyfillBlob() {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  global.Blob = BlobPolyfill as any;
+  // Workaround as `blob.text()` is not available in jsdom (https://github.com/jsdom/jsdom/issues/2555)
+}

tests/shared/bootstrap/setup.ts

@@ -1,4 +1,6 @@
 import { afterEach } from 'vitest';
 import { enableAutoUnmount } from '@vue/test-utils';
+import { polyfillBlob } from './BlobPolyfill';
 
 enableAutoUnmount(afterEach);
+polyfillBlob();

tests/unit/infrastructure/Dialog/Browser/BrowserDialog.spec.ts

@@ -0,0 +1,31 @@
+import { describe, it, expect } from 'vitest';
+import { FileType } from '@/presentation/common/Dialog';
+import { BrowserDialog } from '@/infrastructure/Dialog/Browser/BrowserDialog';
+import { BrowserSaveFileDialog } from '@/infrastructure/Dialog/Browser/BrowserSaveFileDialog';
+
+describe('BrowserDialog', () => {
+  describe('saveFile', () => {
+    it('passes correct arguments', () => {
+      // arrange
+      const expectedFileContents = 'test content';
+      const expectedFileName = 'test.sh';
+      const expectedFileType = FileType.ShellScript;
+      let actualSaveFileArgs: Parameters<BrowserSaveFileDialog['saveFile']> | undefined;
+      const fileSaverDialogSpy: BrowserSaveFileDialog = {
+        saveFile: (...args) => {
+          actualSaveFileArgs = args;
+        },
+      };
+      const browserDialog = new BrowserDialog(fileSaverDialogSpy);
+
+      // act
+      browserDialog.saveFile(expectedFileContents, expectedFileName, expectedFileType);
+
+      // assert
+      expect(actualSaveFileArgs)
+        .to
+        .deep
+        .equal([expectedFileContents, expectedFileName, expectedFileType]);
+    });
+  });
+});

tests/unit/infrastructure/Dialog/Browser/FileSaverDialog.spec.ts

@@ -0,0 +1,126 @@
+import { describe, it, expect } from 'vitest';
+import { FileSaverDialog, SaveAsFunction, WindowOpenFunction } from '@/infrastructure/Dialog/Browser/FileSaverDialog';
+import { FileType } from '@/presentation/common/Dialog';
+import { expectExists } from '@tests/shared/Assertions/ExpectExists';
+
+describe('FileSaverDialog', () => {
+  describe('saveFile', () => {
+    describe('saving file with correct mime type', () => {
+      const testCases: ReadonlyArray<{
+        readonly fileType: FileType;
+        readonly expectedMimeType: string;
+      }> = [
+        { fileType: FileType.BatchFile, expectedMimeType: 'application/bat' },
+        { fileType: FileType.ShellScript, expectedMimeType: 'text/x-shellscript' },
+      ];
+      testCases.forEach(({ fileType, expectedMimeType }) => {
+        it(`correct mimeType for ${FileType[fileType]}`, () => {
+          // arrange
+          let actualMimeType: string | undefined;
+          const saveAsSpy: SaveAsFunction = (blob) => {
+            actualMimeType = blob.type;
+          };
+
+          // act
+          new SaveFileTestSetup()
+            .withFileType(fileType)
+            .withSaveAs(saveAsSpy)
+            .saveFile();
+
+          // assert
+          expect(actualMimeType).to.equal(expectedMimeType);
+        });
+      });
+    });
+    it('blob contains correct file contents', async () => {
+      // arrange
+      const expectedFileContents = 'expected file contents';
+      let actualBlob: Blob | undefined;
+      const saveAsSpy: SaveAsFunction = (blob) => {
+        actualBlob = blob;
+      };
+
+      // act
+      new SaveFileTestSetup()
+        .withSaveAs(saveAsSpy)
+        .withFileContents(expectedFileContents)
+        .saveFile();
+
+      // assert
+      expectExists(actualBlob);
+      const actualFileContents = await actualBlob.text();
+      expect(actualFileContents).to.equal(expectedFileContents);
+    });
+    it('opens new window on save failure', () => {
+      // arrange
+      const fileContents = 'test file contents';
+      const failingSaveAs: SaveAsFunction = () => {
+        throw new Error('injected fail');
+      };
+      let calledArgs: Parameters<WindowOpenFunction> | undefined;
+      const windowOpenSpy: WindowOpenFunction = (...args) => {
+        calledArgs = args;
+      };
+
+      // act
+      new SaveFileTestSetup()
+        .withSaveAs(failingSaveAs)
+        .withFileType(FileType.BatchFile)
+        .withFileContents(fileContents)
+        .withWindowOpen(windowOpenSpy)
+        .saveFile();
+
+      // assert
+      expectExists(calledArgs);
+      const [url, target, features] = calledArgs;
+      const mimeType = 'application/bat';
+      expect(url).to.equal(`data:${mimeType},${encodeURIComponent(fileContents)}`);
+      expect(target).to.equal('_blank');
+      expect(features).to.equal('');
+    });
+  });
+});
+
+class SaveFileTestSetup {
+  private saveAs: SaveAsFunction = () => {};
+
+  private windowOpen: WindowOpenFunction = () => {};
+
+  private fileContents: string = `${SaveFileTestSetup.name} file contents`;
+
+  private fileName: string = `${SaveFileTestSetup.name} file name`;
+
+  private fileType: FileType = FileType.BatchFile;
+
+  public withSaveAs(saveAs: SaveAsFunction): this {
+    this.saveAs = saveAs;
+    return this;
+  }
+
+  public withFileContents(fileContents: string): this {
+    this.fileContents = fileContents;
+    return this;
+  }
+
+  public withFileType(fileType: FileType): this {
+    this.fileType = fileType;
+    return this;
+  }
+
+  public withWindowOpen(windowOpen: WindowOpenFunction): this {
+    this.windowOpen = windowOpen;
+    return this;
+  }
+
+  public saveFile() {
+    const dialog = new FileSaverDialog(
+      this.saveAs,
+      this.windowOpen,
+    );
+    return dialog.saveFile(
+      this.fileContents,
+      this.fileName,
+      this.fileType,
+    );
+  }
+}

tests/unit/infrastructure/Dialog/Electron/ElectronDialog.spec.ts

@@ -0,0 +1,32 @@
+import { describe, it, expect } from 'vitest';
+import { FileType } from '@/presentation/common/Dialog';
+import { BrowserDialog } from '@/infrastructure/Dialog/Browser/BrowserDialog';
+import { ElectronSaveFileDialog } from '@/infrastructure/Dialog/Electron/ElectronSaveFileDialog';
+
+describe('BrowserDialog', () => {
+  describe('saveFile', () => {
+    it('passes correct arguments', async () => {
+      // arrange
+      const expectedFileContents = 'test content';
+      const expectedFileName = 'test.sh';
+      const expectedFileType = FileType.ShellScript;
+      let actualSaveFileArgs: Parameters<ElectronSaveFileDialog['saveFile']> | undefined;
+      const fileSaverDialogSpy: ElectronSaveFileDialog = {
+        saveFile: (...args) => {
+          actualSaveFileArgs = args;
+          return Promise.resolve();
+        },
+      };
+      const browserDialog = new BrowserDialog(fileSaverDialogSpy);
+
+      // act
+      await browserDialog.saveFile(expectedFileContents, expectedFileName, expectedFileType);
+
+      // assert
+      expect(actualSaveFileArgs)
+        .to
+        .deep
+        .equal([expectedFileContents, expectedFileName, expectedFileType]);
+    });
+  });
+});

tests/unit/infrastructure/Dialog/Electron/ElectronFileDialogOperationsStub.ts

@@ -0,0 +1,45 @@
+import { ElectronFileDialogOperations } from '@/infrastructure/Dialog/Electron/NodeElectronSaveFileDialog';
+import { StubWithObservableMethodCalls } from '@tests/unit/shared/Stubs/StubWithObservableMethodCalls';
+
+export class ElectronFileDialogOperationsStub
+  extends StubWithObservableMethodCalls<ElectronFileDialogOperations>
+  implements ElectronFileDialogOperations {
+  private mimicUserCancel = false;
+
+  private userDownloadsPath = `[${ElectronFileDialogOperationsStub.name}] downloads path`;
+
+  private userSelectedFilePath = `${ElectronFileDialogOperationsStub.name} user selected file path`;
+
+  public withMimicUserCancel(isCancelled: boolean): this {
+    this.mimicUserCancel = isCancelled;
+    return this;
+  }
+
+  public withUserDownloadsPath(userDownloadsPath: string): this {
+    this.userDownloadsPath = userDownloadsPath;
+    return this;
+  }
+
+  public withUserSelectedFilePath(userSelectedFilePath: string): this {
+    this.userSelectedFilePath = userSelectedFilePath;
+    return this;
+  }
+
+  public getUserDownloadsPath(): string {
+    return this.userDownloadsPath;
+  }
+
+  public showSaveDialog(
+    options: Electron.SaveDialogOptions,
+  ): Promise<Electron.SaveDialogReturnValue> {
+    this.registerMethodCall({
+      methodName: 'showSaveDialog',
+      args: [options],
+    });
+    const returnValue: Electron.SaveDialogReturnValue = {
+      canceled: this.mimicUserCancel,
+      filePath: this.userSelectedFilePath,
+    };
+    return Promise.resolve(returnValue);
+  }
+}

tests/unit/infrastructure/Dialog/Electron/NodeElectronSaveFileDialog.spec.ts

@@ -0,0 +1,268 @@
+import { describe, it, expect } from 'vitest';
+import { FileType } from '@/presentation/common/Dialog';
+import { ElectronFileDialogOperations, NodeElectronSaveFileDialog, NodeFileOperations } from '@/infrastructure/Dialog/Electron/NodeElectronSaveFileDialog';
+import { Logger } from '@/application/Common/Log/Logger';
+import { LoggerStub } from '@tests/unit/shared/Stubs/LoggerStub';
+import { expectExists } from '@tests/shared/Assertions/ExpectExists';
+import { ElectronFileDialogOperationsStub } from './ElectronFileDialogOperationsStub';
+import { NodeFileOperationsStub } from './NodeFileOperationsStub';
+
+describe('NodeElectronSaveFileDialog', () => {
+  describe('shows dialog with correct options', () => {
+    it('correct title', async () => {
+      // arrange
+      const expectedFileName = 'expected-file-name';
+      const electronMock = new ElectronFileDialogOperationsStub();
+      const context = new SaveFileDialogTestSetup()
+        .withElectron(electronMock)
+        .withFileName(expectedFileName);
+      // act
+      await context.saveFile();
+      // assert
+      assertDialogOptionMatchesExpectedValue(expectedFileName, (opts) => opts.title, electronMock);
+    });
+    it('correct properties', async () => {
+      // arrange
+      const expectedProperties = [
+        'createDirectory',
+        'showOverwriteConfirmation',
+      ];
+      const electronMock = new ElectronFileDialogOperationsStub();
+      const context = new SaveFileDialogTestSetup()
+        .withElectron(electronMock);
+      // act
+      await context.saveFile();
+      // assert
+      assertDialogOptionMatchesExpectedValue(
+        expectedProperties,
+        (opts) => opts.properties,
+        electronMock,
+      );
+    });
+    it('correct default path', async () => {
+      // arrange
+      const pathSegmentSeparator = '_{test-separator}_';
+      const expectedFileName = 'expected-file-name';
+      const expectedParentDirectory = 'expected-downloads-path';
+      const expectedFilePath = [
+        expectedParentDirectory,
+        expectedFileName,
+      ].join(pathSegmentSeparator);
+      const electronMock = new ElectronFileDialogOperationsStub()
+        .withUserDownloadsPath(expectedParentDirectory);
+      const context = new SaveFileDialogTestSetup()
+        .withElectron(electronMock)
+        .withFileName(expectedFileName)
+        .withNode(new NodeFileOperationsStub().withPathSegmentSeparator(pathSegmentSeparator));
+      // act
+      await context.saveFile();
+      // assert
+      assertDialogOptionMatchesExpectedValue(
+        expectedFilePath,
+        (opts) => opts.defaultPath,
+        electronMock,
+      );
+    });
+    describe('correct filters', () => {
+      const defaultFilter: Electron.FileFilter = {
+        name: 'All Files',
+        extensions: ['*'],
+      };
+      const testScenarios: Record<FileType, Electron.FileFilter[]> = {
+        [FileType.BatchFile]: [
+          defaultFilter,
+          {
+            name: 'Batch Files',
+            extensions: ['bat', 'cmd'],
+          },
+        ],
+        [FileType.ShellScript]: [
+          defaultFilter,
+          {
+            name: 'Shell Scripts',
+            extensions: ['sh', 'bash', 'zsh'],
+          },
+        ],
+      };
+      Object.entries(testScenarios).forEach(([fileTypeKey, expectedFilters]) => {
+        const fileType = Number(fileTypeKey) as FileType;
+        it(`applies correct filters for ${FileType[fileType]}`, async () => {
+          // arrange
+          const electronMock = new ElectronFileDialogOperationsStub();
+          const context = new SaveFileDialogTestSetup()
+            .withFileType(fileType)
+            .withElectron(electronMock);
+          // act
+          await context.saveFile();
+          // assert
+          const sortFilters = (
+            filters: Electron.FileFilter[],
+          ) => filters.sort((a, b) => a.name.localeCompare(b.name));
+          const expectedSortedFilters = sortFilters(expectedFilters);
+          assertDialogOptionMatchesExpectedValue(
+            expectedSortedFilters,
+            (opts) => sortFilters(opts.filters ?? []),
+            electronMock,
+          );
+        });
+      });
+    });
+  });
+
+  describe('saves the file when the dialog is not canceled', () => {
+    it('writes to the selected file path', async () => {
+      // arrange
+      const expectedFilePath = 'expected-file-path';
+      const isCancelled = false;
+      const electronMock = new ElectronFileDialogOperationsStub()
+        .withMimicUserCancel(isCancelled)
+        .withUserSelectedFilePath(expectedFilePath);
+      const nodeMock = new NodeFileOperationsStub();
+      const context = new SaveFileDialogTestSetup()
+        .withElectron(electronMock)
+        .withNode(nodeMock);
+
+      // act
+      await context.saveFile();
+
+      // assert
+      const saveFileCalls = nodeMock.callHistory.filter((c) => c.methodName === 'writeFile');
+      expect(saveFileCalls).to.have.lengthOf(1);
+      const [actualFilePath] = saveFileCalls[0].args;
+      expect(actualFilePath).to.equal(expectedFilePath);
+    });
+
+    it('writes the correct file contents', async () => {
+      // arrange
+      const expectedFileContents = 'expected-file-contents';
+      const isCancelled = false;
+      const electronMock = new ElectronFileDialogOperationsStub()
+        .withMimicUserCancel(isCancelled);
+      const nodeMock = new NodeFileOperationsStub();
+      const context = new SaveFileDialogTestSetup()
+        .withElectron(electronMock)
+        .withFileContents(expectedFileContents)
+        .withNode(nodeMock);
+
+      // act
+      await context.saveFile();
+
+      // assert
+      const saveFileCalls = nodeMock.callHistory.filter((c) => c.methodName === 'writeFile');
+      expect(saveFileCalls).to.have.lengthOf(1);
+      const [,actualFileContents] = saveFileCalls[0].args;
+      expect(actualFileContents).to.equal(expectedFileContents);
+    });
+  });
+
+  it('does not save file when dialog is canceled', async () => {
+    // arrange
+    const isCancelled = true;
+    const electronMock = new ElectronFileDialogOperationsStub()
+      .withMimicUserCancel(isCancelled);
+    const nodeMock = new NodeFileOperationsStub();
+    const context = new SaveFileDialogTestSetup()
+      .withElectron(electronMock)
+      .withNode(nodeMock);
+
+    // act
+    await context.saveFile();
+
+    // assert
+    const saveFileCall = nodeMock.callHistory.find((c) => c.methodName === 'writeFile');
+    expect(saveFileCall).to.equal(undefined);
+  });
+
+  describe('logging', () => {
+    it('logs an error if writing the file fails', async () => {
+      // arrange
+      const expectedErrorMessage = 'Injected write error';
+      const electronMock = new ElectronFileDialogOperationsStub().withMimicUserCancel(false);
+      const nodeMock = new NodeFileOperationsStub();
+      nodeMock.writeFile = () => Promise.reject(new Error(expectedErrorMessage));
+      const loggerStub = new LoggerStub();
+      const context = new SaveFileDialogTestSetup()
+        .withElectron(electronMock)
+        .withNode(nodeMock)
+        .withLogger(loggerStub);
+
+      // act
+      await context.saveFile();
+
+      // assert
+      const errorCalls = loggerStub.callHistory.filter((c) => c.methodName === 'error');
+      expect(errorCalls.length).to.equal(1);
+      const errorCall = errorCalls[0];
+      const [errorMessage] = errorCall.args;
+      expect(errorMessage).to.include(expectedErrorMessage);
+    });
+  });
+});
+
+class SaveFileDialogTestSetup {
+  private fileContents = `${SaveFileDialogTestSetup.name} file contents`;
+
+  private fileName = `${SaveFileDialogTestSetup.name} file name`;
+
+  private fileType = FileType.BatchFile;
+
+  private logger: Logger = new LoggerStub();
+
+  private electron: ElectronFileDialogOperations = new ElectronFileDialogOperationsStub();
+
+  private node: NodeFileOperations = new NodeFileOperationsStub();
+
+  public withElectron(electron: ElectronFileDialogOperations): this {
+    this.electron = electron;
+    return this;
+  }
+
+  public withNode(node: NodeFileOperations): this {
+    this.node = node;
+    return this;
+  }
+
+  public withLogger(logger: Logger): this {
+    this.logger = logger;
+    return this;
+  }
+
+  public withFileName(fileName: string): this {
+    this.fileName = fileName;
+    return this;
+  }
+
+  public withFileContents(fileContents: string): this {
+    this.fileContents = fileContents;
+    return this;
+  }
+
+  public withFileType(fileType: FileType): this {
+    this.fileType = fileType;
+    return this;
+  }
+
+  public saveFile() {
+    const dialog = new NodeElectronSaveFileDialog(this.logger, this.electron, this.node);
+    return dialog.saveFile(
+      this.fileContents,
+      this.fileName,
+      this.fileType,
+    );
+  }
+}
+
+function assertDialogOptionMatchesExpectedValue<T>(
+  expectedValue: T,
+  getActualOption: (opts: Electron.SaveDialogOptions) => T | undefined,
+  electronMock: ElectronFileDialogOperationsStub,
+): void {
+  const showDialogCalls = electronMock.callHistory.filter((c) => c.methodName === 'showSaveDialog');
+  expect(showDialogCalls).to.have.lengthOf(1);
+  const showDialogCall = showDialogCalls[0];
+  expectExists(showDialogCall);
+  const [options] = showDialogCall.args;
+  expectExists(options);
+  const actualValue = getActualOption(options);
+  expect(actualValue).to.deep.equal(expectedValue);
+}

tests/unit/infrastructure/Dialog/Electron/NodeFileOperationsStub.ts

@@ -0,0 +1,29 @@
+import { NodeFileOperations } from '@/infrastructure/Dialog/Electron/NodeElectronSaveFileDialog';
+import { StubWithObservableMethodCalls } from '@tests/unit/shared/Stubs/StubWithObservableMethodCalls';
+
+export class NodeFileOperationsStub
+  extends StubWithObservableMethodCalls<NodeFileOperations>
+  implements NodeFileOperations {
+  private pathSegmentSeparator = `[${NodeFileOperationsStub.name} path segment separator]`;
+
+  public join(...paths: string[]): string {
+    this.registerMethodCall({
+      methodName: 'join',
+      args: [...paths],
+    });
+    return paths.join(this.pathSegmentSeparator);
+  }
+
+  public writeFile(file: string, data: string): Promise<void> {
+    this.registerMethodCall({
+      methodName: 'writeFile',
+      args: [file, data],
+    });
+    return Promise.resolve();
+  }
+
+  public withPathSegmentSeparator(pathSegmentSeparator: string): this {
+    this.pathSegmentSeparator = pathSegmentSeparator;
+    return this;
+  }
+}

tests/unit/infrastructure/RuntimeEnvironment/Browser/BrowserRuntimeEnvironment.spec.ts

@@ -1,4 +1,3 @@
-// eslint-disable-next-line max-classes-per-file
 import { describe, it, expect } from 'vitest';
 import { BrowserOsDetector } from '@/infrastructure/RuntimeEnvironment/Browser/BrowserOs/BrowserOsDetector';
 import { OperatingSystem } from '@/domain/OperatingSystem';
@@ -42,31 +41,32 @@ describe('BrowserRuntimeEnvironment', () => {
       expect(actualTouchSupport).to.equal(expectedTouchSupport);
     });
   });
-  describe('isDesktop', () => {
-    it('returns true when window property isDesktop is true', () => {
+  describe('isRunningAsDesktopApplication', () => {
+    it('returns true when window property `isRunningAsDesktopApplication` is true', () => {
       // arrange
-      const desktopWindow = {
-        isDesktop: true,
+      const expectedValue = true;
+      const desktopWindow: Partial<Window> = {
+        isRunningAsDesktopApplication: true,
       };
       // act
       const sut = new BrowserRuntimeEnvironmentBuilder()
         .withWindow(desktopWindow)
         .build();
       // assert
-      expect(sut.isDesktop).to.equal(true);
+      expect(sut.isRunningAsDesktopApplication).to.equal(expectedValue);
     });
-    it('returns false when window property isDesktop is false', () => {
+    it('returns false when window property `isRunningAsDesktopApplication` is undefined', () => {
       // arrange
       const expectedValue = false;
-      const browserWindow = {
-        isDesktop: false,
+      const browserWindow: Partial<Window> = {
+        isRunningAsDesktopApplication: undefined,
       };
       // act
       const sut = new BrowserRuntimeEnvironmentBuilder()
         .withWindow(browserWindow)
         .build();
       // assert
-      expect(sut.isDesktop).to.equal(expectedValue);
+      expect(sut.isRunningAsDesktopApplication).to.equal(expectedValue);
     });
   });
   describe('os', () => {
@@ -112,47 +112,6 @@ describe('BrowserRuntimeEnvironment', () => {
       // assert
       expect(actual).to.equal(expected);
     });
-    describe('desktop os', () => {
-      describe('returns from window property `os`', () => {
-        const testValues = [
-          OperatingSystem.macOS,
-          OperatingSystem.Windows,
-          OperatingSystem.Linux,
-        ];
-        testValues.forEach((testValue) => {
-          it(`given ${OperatingSystem[testValue]}`, () => {
-            // arrange
-            const expectedOs = testValue;
-            const desktopWindowWithOs = {
-              isDesktop: true,
-              os: expectedOs,
-            };
-            // act
-            const sut = new BrowserRuntimeEnvironmentBuilder()
-              .withWindow(desktopWindowWithOs)
-              .build();
-            // assert
-            const actualOs = sut.os;
-            expect(actualOs).to.equal(expectedOs);
-          });
-        });
-      });
-      describe('returns undefined when window property `os` is absent', () => {
-        itEachAbsentObjectValue((absentValue) => {
-          // arrange
-          const expectedValue = undefined;
-          const windowWithAbsentOs = {
-            os: absentValue as never,
-          };
-          // act
-          const sut = new BrowserRuntimeEnvironmentBuilder()
-            .withWindow(windowWithAbsentOs)
-            .build();
-          // assert
-          expect(sut.os).to.equal(expectedValue);
-        });
-      });
-    });
   });
   describe('isNonProduction', () => {
     [true, false].forEach((value) => {

tests/unit/infrastructure/RuntimeEnvironment/Node/NodeRuntimeEnvironment.spec.ts

@@ -62,14 +62,14 @@ describe('NodeRuntimeEnvironment', () => {
       expect(environment.os).to.equal(expectedOs);
     });
   });
-  describe('isDesktop', () => {
+  describe('isRunningAsDesktopApplication', () => {
     it('is always true', () => {
       // arrange
       const expectedDesktopCondition = true;
       // act
       const environment = new NodeRuntimeEnvironment();
       /// assert
-      expect(environment.isDesktop).to.equal(expectedDesktopCondition);
+      expect(environment.isRunningAsDesktopApplication).to.equal(expectedDesktopCondition);
     });
   });
   describe('isNonProduction', () => {

tests/unit/infrastructure/RuntimeEnvironment/RuntimeEnvironmentFactory.spec.ts

@@ -1,73 +1,95 @@
 import { describe, it, expect } from 'vitest';
 import {
-  BrowserRuntimeEnvironmentFactory, NodeRuntimeEnvironmentFactory,
-  GlobalAccessor as GlobalPropertiesAccessor, determineAndCreateRuntimeEnvironment,
+  BrowserRuntimeEnvironmentFactory, GlobalPropertiesAccessor, NodeRuntimeEnvironmentFactory,
+  determineAndCreateRuntimeEnvironment,
 } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironmentFactory';
 import { RuntimeEnvironmentStub } from '@tests/unit/shared/Stubs/RuntimeEnvironmentStub';
 
 describe('RuntimeEnvironmentFactory', () => {
   describe('determineAndCreateRuntimeEnvironment', () => {
-    it('uses browser environment when window exists', () => {
+    describe('Node environment creation', () => {
+      it('selects Node environment if Electron main process detected', () => {
         // arrange
+        const processStub = createProcessStub({
+          versions: {
+            electron: '28.1.3',
+          } as NodeJS.ProcessVersions,
+        });
         const expectedEnvironment = new RuntimeEnvironmentStub();
         const context = new RuntimeEnvironmentFactoryTestSetup()
-        .withWindowAccessor(() => createWindowStub())
+          .withGlobalProcess(processStub)
+          .withNodeEnvironmentFactory(() => expectedEnvironment);
+        // act
+        const actualEnvironment = context.buildEnvironment();
+        // assert
+        expect(actualEnvironment).to.equal(expectedEnvironment);
+      });
+      it('passes correct process to Node environment factory', () => {
+        // arrange
+        const expectedProcess = createProcessStub({
+          versions: {
+            electron: '28.1.3',
+          } as NodeJS.ProcessVersions,
+        });
+        let actualProcess: GlobalProcess;
+        const nodeEnvironmentFactoryMock: NodeRuntimeEnvironmentFactory = (providedProcess) => {
+          actualProcess = providedProcess;
+          return new RuntimeEnvironmentStub();
+        };
+        const context = new RuntimeEnvironmentFactoryTestSetup()
+          .withGlobalProcess(expectedProcess)
+          .withNodeEnvironmentFactory(nodeEnvironmentFactoryMock);
+        // act
+        context.buildEnvironment();
+        // assert
+        expect(actualProcess).to.equal(expectedProcess);
+      });
+    });
+    describe('browser environment creation', () => {
+      it('selects browser environment if Electron main process not detected', () => {
+        // arrange
+        const expectedEnvironment = new RuntimeEnvironmentStub();
+        const undefinedProcess: GlobalProcess = undefined;
+        const windowStub = createWindowStub();
+        const context = new RuntimeEnvironmentFactoryTestSetup()
+          .withGlobalProcess(undefinedProcess)
+          .withGlobalWindow(windowStub)
           .withBrowserEnvironmentFactory(() => expectedEnvironment);
         // act
         const actualEnvironment = context.buildEnvironment();
         // assert
         expect(actualEnvironment).to.equal(expectedEnvironment);
       });
-
-    it('passes correct window to browser environment', () => {
+      it('passes correct window to browser environment factory', () => {
         // arrange
-      const expectedWindow = createWindowStub();
-      let actualWindow: Window | undefined;
-      const browserEnvironmentFactoryMock: BrowserRuntimeEnvironmentFactory = (providedWindow) => {
+        const expectedWindow = createWindowStub({
+          isRunningAsDesktopApplication: undefined,
+        });
+        let actualWindow: GlobalWindow;
+        const browserEnvironmentFactoryMock
+        : BrowserRuntimeEnvironmentFactory = (providedWindow) => {
           actualWindow = providedWindow;
           return new RuntimeEnvironmentStub();
         };
+        const undefinedProcess: GlobalProcess = undefined;
         const context = new RuntimeEnvironmentFactoryTestSetup()
-        .withWindowAccessor(() => expectedWindow)
+          .withGlobalWindow(expectedWindow)
+          .withGlobalProcess(undefinedProcess)
           .withBrowserEnvironmentFactory(browserEnvironmentFactoryMock);
         // act
         context.buildEnvironment();
         // assert
         expect(actualWindow).to.equal(expectedWindow);
       });
-
-    it('uses node environment when window is absent', () => {
-      // arrange
-      const expectedEnvironment = new RuntimeEnvironmentStub();
-      const context = new RuntimeEnvironmentFactoryTestSetup()
-        .withWindowAccessor(() => undefined)
-        .withProcessAccessor(() => createProcessStub())
-        .withNodeEnvironmentFactory(() => expectedEnvironment);
-      // act
-      const actualEnvironment = context.buildEnvironment();
-      // assert
-      expect(actualEnvironment).to.equal(expectedEnvironment);
     });
-
-    it('uses node environment when window is present too', () => { // This allows running integration tests
+    it('throws error when both window and process are undefined', () => {
       // arrange
-      const expectedEnvironment = new RuntimeEnvironmentStub();
+      const undefinedWindow: GlobalWindow = undefined;
+      const undefinedProcess: GlobalProcess = undefined;
+      const expectedError = 'Unsupported runtime environment: The current context is neither a recognized browser nor a desktop environment.';
       const context = new RuntimeEnvironmentFactoryTestSetup()
-        .withWindowAccessor(() => createWindowStub())
-        .withProcessAccessor(() => createProcessStub())
-        .withNodeEnvironmentFactory(() => expectedEnvironment);
-      // act
-      const actualEnvironment = context.buildEnvironment();
-      // assert
-      expect(actualEnvironment).to.equal(expectedEnvironment);
-    });
-
-    it('throws if both node and window are missing', () => {
-      // arrange
-      const expectedError = 'Unsupported runtime environment: The current context is neither a recognized browser nor a Node.js environment.';
-      const context = new RuntimeEnvironmentFactoryTestSetup()
-        .withWindowAccessor(() => undefined)
-        .withProcessAccessor(() => undefined);
+        .withGlobalProcess(undefinedProcess)
+        .withGlobalWindow(undefinedWindow);
       // act
       const act = () => context.buildEnvironment();
       // assert
@@ -76,22 +98,22 @@ describe('RuntimeEnvironmentFactory', () => {
   });
 });
 
-function createWindowStub(): Window {
-  return {} as Window;
+function createWindowStub(partialWindowProperties?: Partial<Window>): Window {
+  return {
+    ...partialWindowProperties,
+  } as Window;
 }
 
-function createProcessStub(): NodeJS.Process {
-  return {} as NodeJS.Process;
+function createProcessStub(partialProcessProperties?: Partial<NodeJS.Process>): NodeJS.Process {
+  return {
+    ...partialProcessProperties,
+  } as NodeJS.Process;
 }
 
-type WindowAccessor = GlobalPropertiesAccessor['getGlobalWindow'];
-
-type ProcessAccessor = GlobalPropertiesAccessor['getGlobalProcess'];
-
 export class RuntimeEnvironmentFactoryTestSetup {
-  private windowAccessor: WindowAccessor = () => undefined;
+  private globalWindow: GlobalWindow = createWindowStub();
 
-  private processAccessor: ProcessAccessor = () => undefined;
+  private globalProcess: GlobalProcess = createProcessStub();
 
   private browserEnvironmentFactory
   : BrowserRuntimeEnvironmentFactory = () => new RuntimeEnvironmentStub();
@@ -99,13 +121,13 @@ export class RuntimeEnvironmentFactoryTestSetup {
   private nodeEnvironmentFactory
   : NodeRuntimeEnvironmentFactory = () => new RuntimeEnvironmentStub();
 
-  public withWindowAccessor(windowAccessor: WindowAccessor): this {
-    this.windowAccessor = windowAccessor;
+  public withGlobalWindow(globalWindow: GlobalWindow): this {
+    this.globalWindow = globalWindow;
     return this;
   }
 
-  public withProcessAccessor(processAccessor: ProcessAccessor): this {
-    this.processAccessor = processAccessor;
+  public withGlobalProcess(globalProcess: GlobalProcess): this {
+    this.globalProcess = globalProcess;
     return this;
   }
 
@@ -126,11 +148,15 @@ export class RuntimeEnvironmentFactoryTestSetup {
   public buildEnvironment(): ReturnType<typeof determineAndCreateRuntimeEnvironment> {
     return determineAndCreateRuntimeEnvironment(
       {
-        getGlobalProcess: this.processAccessor,
-        getGlobalWindow: this.windowAccessor,
+        window: this.globalWindow,
+        process: this.globalProcess,
       },
       this.browserEnvironmentFactory,
       this.nodeEnvironmentFactory,
     );
   }
 }
+
+type GlobalWindow = GlobalPropertiesAccessor['window'];
+
+type GlobalProcess = GlobalPropertiesAccessor['process'];

tests/unit/infrastructure/RuntimeEnvironment/WindowVariablesValidator.spec.ts

@@ -5,6 +5,9 @@ import { OperatingSystem } from '@/domain/OperatingSystem';
 import { getAbsentObjectTestCases, itEachAbsentObjectValue } from '@tests/unit/shared/TestCases/AbsentTests';
 import { WindowVariablesStub } from '@tests/unit/shared/Stubs/WindowVariablesStub';
 import { CodeRunnerStub } from '@tests/unit/shared/Stubs/CodeRunnerStub';
+import { PropertyKeys } from '@/TypeHelpers';
+import { LoggerStub } from '@tests/unit/shared/Stubs/LoggerStub';
+import { DialogStub } from '@tests/unit/shared/Stubs/DialogStub';
 
 describe('WindowVariablesValidator', () => {
   describe('validateWindowVariables', () => {
@@ -24,20 +27,20 @@ describe('WindowVariablesValidator', () => {
       it('throws an error with a description of all invalid properties', () => {
         // arrange
         const invalidOs = 'invalid' as unknown as OperatingSystem;
-        const invalidIsDesktop = 'not a boolean' as unknown as boolean;
+        const invalidIsRunningAsDesktopApplication = 'not a boolean' as never;
         const expectedError = getExpectedError(
           {
             name: 'os',
             object: invalidOs,
           },
           {
-            name: 'isDesktop',
-            object: invalidIsDesktop,
+            name: 'isRunningAsDesktopApplication',
+            object: invalidIsRunningAsDesktopApplication,
           },
         );
         const input = new WindowVariablesStub()
           .withOs(invalidOs)
-          .withIsDesktop(invalidIsDesktop);
+          .withIsRunningAsDesktopApplication(invalidIsRunningAsDesktopApplication);
         // act
         const act = () => validateWindowVariables(input);
         // assert
@@ -82,7 +85,7 @@ describe('WindowVariablesValidator', () => {
         it('does not throw for a missing os value', () => {
           // arrange
           const input = new WindowVariablesStub()
-            .withIsDesktop(true)
+            .withIsRunningAsDesktopApplication(true)
             .withOs(undefined);
           // act
           const act = () => validateWindowVariables(input);
@@ -91,15 +94,24 @@ describe('WindowVariablesValidator', () => {
         });
       });
 
-      describe('`isDesktop` property', () => {
+      describe('`isRunningAsDesktopApplication` property', () => {
         it('does not throw when true with valid services', () => {
           // arrange
-          const validCodeRunner = new CodeRunnerStub();
-          const input = new WindowVariablesStub()
-            .withIsDesktop(true)
-            .withCodeRunner(validCodeRunner);
+          const windowVariables = new WindowVariablesStub();
+          const windowVariableConfigurators: Record< // Ensure types match for compile-time checking
+          PropertyKeys<Required<WindowVariables>>,
+          (stub: WindowVariablesStub) => WindowVariablesStub> = {
+            isRunningAsDesktopApplication: (s) => s.withIsRunningAsDesktopApplication(true),
+            codeRunner: (s) => s.withCodeRunner(new CodeRunnerStub()),
+            os: (s) => s.withOs(OperatingSystem.Windows),
+            log: (s) => s.withLog(new LoggerStub()),
+            dialog: (s) => s.withDialog(new DialogStub()),
+          };
+          Object
+            .values(windowVariableConfigurators)
+            .forEach((configure) => configure(windowVariables));
           // act
-          const act = () => validateWindowVariables(input);
+          const act = () => validateWindowVariables(windowVariables);
           // assert
           expect(act).to.not.throw();
         });
@@ -109,7 +121,7 @@ describe('WindowVariablesValidator', () => {
             // arrange
             const absentCodeRunner = absentValue;
             const input = new WindowVariablesStub()
-              .withIsDesktop(false)
+              .withIsRunningAsDesktopApplication(undefined)
               .withCodeRunner(absentCodeRunner);
             // act
             const act = () => validateWindowVariables(input);
@@ -150,7 +162,7 @@ function expectObjectOnDesktop<T>(key: keyof WindowVariables) {
       });
       const input: WindowVariables = {
         ...new WindowVariablesStub(),
-        isDesktop: isOnDesktop,
+        isRunningAsDesktopApplication: isOnDesktop,
         [key]: invalidObject,
       };
       // act
@@ -159,14 +171,13 @@ function expectObjectOnDesktop<T>(key: keyof WindowVariables) {
       expect(act).to.throw(expectedError);
     });
   });
-  describe('does not object type when not on desktop', () => {
+  describe('does not validate object type when not on desktop', () => {
     itEachInvalidObjectValue((invalidObjectValue) => {
       // arrange
-      const isOnDesktop = false;
       const invalidObject = invalidObjectValue as T;
       const input: WindowVariables = {
         ...new WindowVariablesStub(),
-        isDesktop: isOnDesktop,
+        isRunningAsDesktopApplication: undefined,
         [key]: invalidObject,
       };
       // act

tests/unit/presentation/bootstrapping/DependencyProvider.spec.ts

@@ -19,6 +19,7 @@ describe('DependencyProvider', () => {
       useUserSelectionState: createTransientTests(),
       useLogger: createTransientTests(),
       useCodeRunner: createTransientTests(),
+      useDialog: createTransientTests(),
     };
     Object.entries(testCases).forEach(([key, runTests]) => {
       const registeredKey = InjectionKeys[key].key;

tests/unit/presentation/components/Scripts/Slider/UseDragHandler.spec.ts

@@ -245,7 +245,7 @@ function initializeDragHandlerWithMocks(mocks?: {
 }
 
 function createMockPointerEvent(...args: ConstructorArguments<typeof PointerEvent>): PointerEvent {
-  return new MouseEvent(...args) as PointerEvent; // JSDom does not support `PointerEvent` constructor, https://github.com/jsdom/jsdom/issues/2527
+  return new MouseEvent(...args) as PointerEvent; // jsdom does not support `PointerEvent` constructor, https://github.com/jsdom/jsdom/issues/2527
 }
 
 class DragDomModifierMock implements DragDomModifier {

tests/unit/presentation/components/Shared/Hooks/Dialog/ClientDialogFactory.spec.ts

@@ -0,0 +1,88 @@
+import { describe, it, expect } from 'vitest';
+import { determineDialogBasedOnEnvironment, WindowDialogCreationFunction, BrowserDialogCreationFunction } from '@/presentation/components/Shared/Hooks/Dialog/ClientDialogFactory';
+import { RuntimeEnvironment } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironment';
+import { RuntimeEnvironmentStub } from '@tests/unit/shared/Stubs/RuntimeEnvironmentStub';
+import { DialogStub } from '@tests/unit/shared/Stubs/DialogStub';
+import { collectExceptionMessage } from '@tests/unit/shared/ExceptionCollector';
+
+describe('ClientDialogFactory', () => {
+  describe('determineDialogBasedOnEnvironment', () => {
+    describe('non-desktop environment', () => {
+      it('returns browser dialog', () => {
+        // arrange
+        const expectedDialog = new DialogStub();
+        const context = new DialogCreationTestSetup()
+          .withEnvironment(new RuntimeEnvironmentStub().withIsRunningAsDesktopApplication(false))
+          .withBrowserDialogFactory(() => expectedDialog);
+
+        // act
+        const actualDialog = context.createDialogForTest();
+
+        // assert
+        expect(expectedDialog).to.equal(actualDialog);
+      });
+    });
+    describe('desktop environment', () => {
+      it('returns window-injected dialog', () => {
+        // arrange
+        const expectedDialog = new DialogStub();
+        const context = new DialogCreationTestSetup()
+          .withEnvironment(new RuntimeEnvironmentStub().withIsRunningAsDesktopApplication(true))
+          .withWindowInjectedDialogFactory(() => expectedDialog);
+
+        // act
+        const actualDialog = context.createDialogForTest();
+
+        // assert
+        expect(expectedDialog).to.equal(actualDialog);
+      });
+      it('throws error when window-injected dialog is unavailable', () => {
+        // arrange
+        const expectedError = 'The Dialog API could not be retrieved from the window object.';
+        const context = new DialogCreationTestSetup()
+          .withEnvironment(new RuntimeEnvironmentStub().withIsRunningAsDesktopApplication(true))
+          .withWindowInjectedDialogFactory(() => undefined);
+
+        // act
+        const act = () => context.createDialogForTest();
+
+        // assert
+        const actualError = collectExceptionMessage(act);
+        expect(actualError).to.include(expectedError);
+      });
+    });
+  });
+});
+
+class DialogCreationTestSetup {
+  private environment: RuntimeEnvironment = new RuntimeEnvironmentStub();
+
+  private browserDialogFactory: BrowserDialogCreationFunction = () => new DialogStub();
+
+  private windowInjectedDialogFactory: WindowDialogCreationFunction = () => new DialogStub();
+
+  public withEnvironment(environment: RuntimeEnvironment): this {
+    this.environment = environment;
+    return this;
+  }
+
+  public withBrowserDialogFactory(browserDialogFactory: BrowserDialogCreationFunction): this {
+    this.browserDialogFactory = browserDialogFactory;
+    return this;
+  }
+
+  public withWindowInjectedDialogFactory(
+    windowInjectedDialogFactory: WindowDialogCreationFunction,
+  ): this {
+    this.windowInjectedDialogFactory = windowInjectedDialogFactory;
+    return this;
+  }
+
+  public createDialogForTest() {
+    return determineDialogBasedOnEnvironment(
+      this.environment,
+      this.windowInjectedDialogFactory,
+      this.browserDialogFactory,
+    );
+  }
+}

tests/unit/presentation/components/Shared/Hooks/Dialog/UseDialog.spec.ts

@@ -0,0 +1,19 @@
+import { describe, it, expect } from 'vitest';
+import { DialogFactory, useDialog } from '@/presentation/components/Shared/Hooks/Dialog/UseDialog';
+import { DialogStub } from '@tests/unit/shared/Stubs/DialogStub';
+
+describe('UseDialog', () => {
+  describe('useDialog', () => {
+    it('returns provided dialog instance', () => {
+      // arrange
+      const expectedDialog = new DialogStub();
+      const factoryMock: DialogFactory = () => expectedDialog;
+
+      // act
+      const { dialog } = useDialog(factoryMock);
+
+      // assert
+      expect(dialog).to.equal(expectedDialog);
+    });
+  });
+});

tests/unit/presentation/components/Shared/Hooks/Log/ClientLoggerFactory.spec.ts

@@ -1,11 +1,11 @@
 // eslint-disable-next-line max-classes-per-file
 import { describe, it } from 'vitest';
 import { RuntimeEnvironment } from '@/infrastructure/RuntimeEnvironment/RuntimeEnvironment';
-import { ClientLoggerFactory, LoggerCreationFunction, WindowAccessor } from '@/presentation/bootstrapping/ClientLoggerFactory';
 import { Logger } from '@/application/Common/Log/Logger';
 import { RuntimeEnvironmentStub } from '@tests/unit/shared/Stubs/RuntimeEnvironmentStub';
 import { itIsSingleton } from '@tests/unit/shared/TestCases/SingletonTests';
 import { LoggerStub } from '@tests/unit/shared/Stubs/LoggerStub';
+import { ClientLoggerFactory, LoggerCreationFunction, WindowAccessor } from '@/presentation/components/Shared/Hooks/Log/ClientLoggerFactory';
 
 describe('ClientLoggerFactory', () => {
   describe('Current', () => {
@@ -29,7 +29,7 @@ describe('ClientLoggerFactory', () => {
         build: (b, expectedLogger) => b
           .withWindowInjectedLoggerFactory(() => expectedLogger)
           .withEnvironment(new RuntimeEnvironmentStub()
-            .withIsDesktop(true)
+            .withIsRunningAsDesktopApplication(true)
             .withIsNonProduction(false))
           .withWindowAccessor(() => createWindowWithLogger())
           .build(),
@@ -39,7 +39,7 @@ describe('ClientLoggerFactory', () => {
         build: (b, expectedLogger) => b
           .withWindowInjectedLoggerFactory(() => expectedLogger)
           .withEnvironment(new RuntimeEnvironmentStub()
-            .withIsDesktop(true)
+            .withIsRunningAsDesktopApplication(true)
             .withIsNonProduction(true))
           .withWindowAccessor(() => createWindowWithLogger())
           .build(),
@@ -49,7 +49,7 @@ describe('ClientLoggerFactory', () => {
         build: (b, expectedLogger) => b
           .withConsoleLoggerFactory(() => expectedLogger)
           .withEnvironment(new RuntimeEnvironmentStub()
-            .withIsDesktop(false)
+            .withIsRunningAsDesktopApplication(false)
             .withIsNonProduction(true))
           .withWindowAccessor(() => createWindowWithLogger())
           .build(),
@@ -59,7 +59,7 @@ describe('ClientLoggerFactory', () => {
         build: (b, expectedLogger) => b
           .withNoopLoggerFactory(() => expectedLogger)
           .withEnvironment(new RuntimeEnvironmentStub()
-            .withIsDesktop(false)
+            .withIsRunningAsDesktopApplication(false)
             .withIsNonProduction(false))
           .withWindowAccessor(() => createWindowWithLogger())
           .build(),
@@ -68,7 +68,7 @@ describe('ClientLoggerFactory', () => {
         description: 'unit/integration tests environment',
         build: (b, expectedLogger) => b
           .withNoopLoggerFactory(() => expectedLogger)
-          .withEnvironment(new RuntimeEnvironmentStub().withIsDesktop(true))
+          .withEnvironment(new RuntimeEnvironmentStub().withIsRunningAsDesktopApplication(true))
           .withWindowAccessor(() => createWindowWithLogger(null))
           .build(),
       },

tests/unit/presentation/components/Shared/Hooks/Log/UseLogger.spec.ts

@@ -1,16 +1,17 @@
 import { describe, it, expect } from 'vitest';
-import { useLogger } from '@/presentation/components/Shared/Hooks/UseLogger';
 import { LoggerStub } from '@tests/unit/shared/Stubs/LoggerStub';
-import { LoggerFactoryStub } from '@tests/unit/shared/Stubs/LoggerFactoryStub';
+import { useLogger } from '@/presentation/components/Shared/Hooks/Log/UseLogger';
+import { LoggerFactory } from '@/presentation/components/Shared/Hooks/Log/LoggerFactory';
 
 describe('UseLogger', () => {
   it('returns expected logger from factory', () => {
     // arrange
     const expectedLogger = new LoggerStub();
-    const factory = new LoggerFactoryStub()
-      .withLogger(expectedLogger);
+    const factoryMock: LoggerFactory = {
+      logger: expectedLogger,
+    };
     // act
-    const { log: actualLogger } = useLogger(factory);
+    const { log: actualLogger } = useLogger(factoryMock);
     // assert
     expect(actualLogger).to.equal(expectedLogger);
   });

tests/unit/presentation/electron/main/IpcRegistration.spec.ts

@@ -1,10 +1,13 @@
 import { describe, it, expect } from 'vitest';
 import { CodeRunnerStub } from '@tests/unit/shared/Stubs/CodeRunnerStub';
-import { IpcChannelDefinitions } from '@/presentation/electron/shared/IpcBridging/IpcChannelDefinitions';
-import { CodeRunnerFactory, IpcRegistrar, registerAllIpcChannels } from '@/presentation/electron/main/IpcRegistration';
+import { ChannelDefinitionKey, IpcChannelDefinitions } from '@/presentation/electron/shared/IpcBridging/IpcChannelDefinitions';
+import {
+  CodeRunnerFactory, DialogFactory, IpcChannelRegistrar, registerAllIpcChannels,
+} from '@/presentation/electron/main/IpcRegistration';
 import { IpcChannel } from '@/presentation/electron/shared/IpcBridging/IpcChannel';
 import { expectExists } from '@tests/shared/Assertions/ExpectExists';
 import { collectExceptionMessage } from '@tests/unit/shared/ExceptionCollector';
+import { DialogStub } from '@tests/unit/shared/Stubs/DialogStub';
 
 describe('IpcRegistration', () => {
   describe('registerAllIpcChannels', () => {
@@ -23,7 +26,7 @@ describe('IpcRegistration', () => {
       });
     });
     describe('registers expected instances', () => {
-      const testScenarios: Record<keyof typeof IpcChannelDefinitions, {
+      const testScenarios: Record<ChannelDefinitionKey, {
         buildContext: (context: IpcRegistrationTestSetup) => IpcRegistrationTestSetup,
         expectedInstance: object,
       }> = {
@@ -34,6 +37,13 @@ describe('IpcRegistration', () => {
             expectedInstance,
           };
         })(),
+        Dialog: (() => {
+          const expectedInstance = new DialogStub();
+          return {
+            buildContext: (c) => c.withDialogFactory(() => expectedInstance),
+            expectedInstance,
+          };
+        })(),
       };
       Object.entries(testScenarios).forEach(([
         key, { buildContext, expectedInstance },
@@ -46,7 +56,8 @@ describe('IpcRegistration', () => {
           // act
           context.run();
           // assert
-          const actualInstance = getRegisteredInstance(IpcChannelDefinitions.CodeRunner);
+          const channel = IpcChannelDefinitions[key];
+          const actualInstance = getRegisteredInstance(channel);
           expect(actualInstance).to.equal(expectedInstance);
         });
       });
@@ -54,7 +65,7 @@ describe('IpcRegistration', () => {
     it('throws an error if registration fails', () => {
       // arrange
       const expectedError = 'registrar error';
-      const registrarMock: IpcRegistrar = () => {
+      const registrarMock: IpcChannelRegistrar = () => {
         throw new Error(expectedError);
       };
       const context = new IpcRegistrationTestSetup()
@@ -70,9 +81,11 @@ describe('IpcRegistration', () => {
 class IpcRegistrationTestSetup {
   private codeRunnerFactory: CodeRunnerFactory = () => new CodeRunnerStub();
 
-  private registrar: IpcRegistrar = () => { /* NOOP */ };
+  private dialogFactory: DialogFactory = () => new DialogStub();
 
-  public withRegistrar(registrar: IpcRegistrar): this {
+  private registrar: IpcChannelRegistrar = () => { /* NOOP */ };
+
+  public withRegistrar(registrar: IpcChannelRegistrar): this {
     this.registrar = registrar;
     return this;
   }
@@ -82,26 +95,37 @@ class IpcRegistrationTestSetup {
     return this;
   }
 
+  public withDialogFactory(dialogFactory: DialogFactory): this {
+    this.dialogFactory = dialogFactory;
+    return this;
+  }
+
   public run() {
     registerAllIpcChannels(
       this.codeRunnerFactory,
+      this.dialogFactory,
       this.registrar,
     );
   }
 }
 
+type DefinedIpcChannelTypes = {
+  [K in ChannelDefinitionKey]: (typeof IpcChannelDefinitions)[K]
+}[ChannelDefinitionKey];
+
 function createIpcRegistrarMock() {
-  const registeredChannels = new Array<Parameters<IpcRegistrar>>();
-  const registrarMock: IpcRegistrar = <T>(channel: IpcChannel<T>, obj: T) => {
+  const registeredChannels = new Array<Parameters<IpcChannelRegistrar>>();
+  const registrarMock: IpcChannelRegistrar = <T>(channel: IpcChannel<T>, obj: T) => {
     registeredChannels.push([channel as IpcChannel<unknown>, obj]);
   };
-  const isChannelRegistered = <T>(channel: IpcChannel<T>): boolean => {
+  const isChannelRegistered = (channel: DefinedIpcChannelTypes): boolean => {
     return registeredChannels.some((i) => i[0] === channel);
   };
-  const getRegisteredInstance = <T>(channel: IpcChannel<T>): unknown => {
+  const getRegisteredInstance = <T>(channel: IpcChannel<T>): T => {
     const registration = registeredChannels.find((i) => i[0] === channel);
     expectExists(registration);
-    return registration[1];
+    const [, registeredInstance] = registration;
+    return registeredInstance as T;
   };
   return {
     registrarMock,

tests/unit/presentation/electron/preload/ContextBridging/RendererApiProvider.spec.ts

@@ -16,7 +16,7 @@ describe('RendererApiProvider', () => {
       readonly expectedValue: unknown;
     }
     const testScenarios: Record<PropertyKeys<Required<WindowVariables>>, WindowVariableTestCase> = {
-      isDesktop: {
+      isRunningAsDesktopApplication: {
         description: 'returns true',
         setupContext: (context) => context,
         expectedValue: true,
@@ -34,6 +34,7 @@ describe('RendererApiProvider', () => {
         instance: new LoggerStub(),
         setupContext: (c, logger) => c.withLogger(logger),
       }),
+      dialog: expectIpcConsumer(IpcChannelDefinitions.Dialog),
     };
     Object.entries(testScenarios).forEach((
       [property, { description, setupContext, expectedValue }],

tests/unit/presentation/electron/shared/IpcChannelDefinitions.spec.ts

@@ -1,10 +1,10 @@
 import { describe, it, expect } from 'vitest';
 import { IpcChannel } from '@/presentation/electron/shared/IpcBridging/IpcChannel';
-import { IpcChannelDefinitions } from '@/presentation/electron/shared/IpcBridging/IpcChannelDefinitions';
+import { ChannelDefinitionKey, IpcChannelDefinitions } from '@/presentation/electron/shared/IpcBridging/IpcChannelDefinitions';
 
 describe('IpcChannelDefinitions', () => {
   it('defines IPC channels correctly', () => {
-    const testScenarios: Record<keyof typeof IpcChannelDefinitions, {
+    const testScenarios: Record<ChannelDefinitionKey, {
       readonly expectedNamespace: string;
       readonly expectedAccessibleMembers: readonly string[];
     }> = {
@@ -12,6 +12,10 @@ describe('IpcChannelDefinitions', () => {
         expectedNamespace: 'code-run',
         expectedAccessibleMembers: ['runCode'],
       },
+      Dialog: {
+        expectedNamespace: 'dialogs',
+        expectedAccessibleMembers: ['saveFile'],
+      },
     };
     Object.entries(testScenarios).forEach((
       [definitionKey, { expectedNamespace, expectedAccessibleMembers }],
@@ -49,7 +53,7 @@ describe('IpcChannelDefinitions', () => {
     it('has unique accessible members within each channel', () => {
       Object.values(IpcChannelDefinitions).forEach((channel) => {
         // arrange
-        const { accessibleMembers: accessibleMembersOfChannel } = channel;
+        const accessibleMembersOfChannel = channel.accessibleMembers as string[];
         // act
         const repeatedAccessibleMembersInChannel = accessibleMembersOfChannel
           .filter((item, index) => accessibleMembersOfChannel.indexOf(item) !== index);

tests/unit/presentation/electron/shared/IpcProxy.spec.ts

@@ -215,6 +215,7 @@ describe('IpcProxy', () => {
       expect(actualChannelNames).to.have.lengthOf(expectedChannelNames.length);
       expect(actualChannelNames).to.have.members(expectedChannelNames);
     });
+    describe('validation', () => {
       it('throws error for non-function members', () => {
         // arrange
         const expectedError = 'Non-function members are not yet supported';
@@ -229,6 +230,21 @@ describe('IpcProxy', () => {
         // assert
         expect(act).to.throw(expectedError);
       });
+      it('throws error for undefined members', () => {
+        // arrange
+        const nonExistingFunctionName = 'nonExistingFunction';
+        const expectedError = `The function "${nonExistingFunctionName}" is not found on the target object.`;
+        const testObject = { };
+        const testIpcChannel: IpcChannel<typeof testObject> = {
+          namespace: 'testNamespace',
+          accessibleMembers: [nonExistingFunctionName] as never,
+        };
+        // act
+        const act = () => registerIpcChannel(testIpcChannel, testObject, mockIpcMain().ipcMainMock);
+        // assert
+        expect(act).to.throw(expectedError);
+      });
+    });
   });
 });
 

tests/unit/shared/Stubs/DialogStub.ts

@@ -0,0 +1,7 @@
+import { Dialog } from '@/presentation/common/Dialog';
+
+export class DialogStub implements Dialog {
+  public saveFile(): Promise<void> {
+    return Promise.resolve();
+  }
+}

tests/unit/shared/Stubs/LoggerFactoryStub.ts

@@ -1,12 +0,0 @@
-import { Logger } from '@/application/Common/Log/Logger';
-import { LoggerFactory } from '@/application/Common/Log/LoggerFactory';
-import { LoggerStub } from './LoggerStub';
-
-export class LoggerFactoryStub implements LoggerFactory {
-  public logger: Logger = new LoggerStub();
-
-  public withLogger(logger: Logger): this {
-    this.logger = logger;
-    return this;
-  }
-}

tests/unit/shared/Stubs/RuntimeEnvironmentStub.ts

@@ -4,7 +4,7 @@ import { OperatingSystem } from '@/domain/OperatingSystem';
 export class RuntimeEnvironmentStub implements RuntimeEnvironment {
   public isNonProduction = true;
 
-  public isDesktop = true;
+  public isRunningAsDesktopApplication = false;
 
   public os: OperatingSystem | undefined = OperatingSystem.Windows;
 
@@ -13,8 +13,8 @@ export class RuntimeEnvironmentStub implements RuntimeEnvironment {
     return this;
   }
 
-  public withIsDesktop(isDesktop: boolean): this {
-    this.isDesktop = isDesktop;
+  public withIsRunningAsDesktopApplication(isRunningAsDesktopApplication: boolean): this {
+    this.isRunningAsDesktopApplication = isRunningAsDesktopApplication;
     return this;
   }
 

tests/unit/shared/Stubs/WindowVariablesStub.ts

@@ -2,25 +2,34 @@ import { OperatingSystem } from '@/domain/OperatingSystem';
 import { Logger } from '@/application/Common/Log/Logger';
 import { WindowVariables } from '@/infrastructure/WindowVariables/WindowVariables';
 import { CodeRunner } from '@/application/CodeRunner/CodeRunner';
+import { Dialog } from '@/presentation/common/Dialog';
 import { LoggerStub } from './LoggerStub';
 import { CodeRunnerStub } from './CodeRunnerStub';
+import { DialogStub } from './DialogStub';
 
 export class WindowVariablesStub implements WindowVariables {
   public codeRunner?: CodeRunner = new CodeRunnerStub();
 
-  public isDesktop = false;
+  public isRunningAsDesktopApplication: true | undefined = true;
 
   public os?: OperatingSystem = OperatingSystem.BlackBerryOS;
 
-  public log: Logger = new LoggerStub();
+  public log?: Logger = new LoggerStub();
+
+  public dialog?: Dialog = new DialogStub();
 
   public withLog(log: Logger): this {
     this.log = log;
     return this;
   }
 
-  public withIsDesktop(value: boolean): this {
-    this.isDesktop = value;
+  public withDialog(dialog: Dialog): this {
+    this.dialog = dialog;
+    return this;
+  }
+
+  public withIsRunningAsDesktopApplication(isRunningAsDesktopApplication: true | undefined): this {
+    this.isRunningAsDesktopApplication = isRunningAsDesktopApplication;
     return this;
   }