refactor: extract app lifecycle orchestration service

src/core/services/app-lifecycle-service.ts

@@ -0,0 +1,72 @@
+import { CliArgs, CliCommandSource } from "../../cli/args";
+
+export interface AppLifecycleServiceDeps {
+  shouldStartApp: (args: CliArgs) => boolean;
+  parseArgs: (argv: string[]) => CliArgs;
+  requestSingleInstanceLock: () => boolean;
+  quitApp: () => void;
+  onSecondInstance: (handler: (_event: unknown, argv: string[]) => void) => void;
+  handleCliCommand: (args: CliArgs, source: CliCommandSource) => void;
+  printHelp: () => void;
+  logNoRunningInstance: () => void;
+  whenReady: (handler: () => Promise<void>) => void;
+  onWindowAllClosed: (handler: () => void) => void;
+  onWillQuit: (handler: () => void) => void;
+  onActivate: (handler: () => void) => void;
+  isDarwinPlatform: () => boolean;
+  onReady: () => Promise<void>;
+  onWillQuitCleanup: () => void;
+  shouldRestoreWindowsOnActivate: () => boolean;
+  restoreWindowsOnActivate: () => void;
+}
+
+export function startAppLifecycleService(
+  initialArgs: CliArgs,
+  deps: AppLifecycleServiceDeps,
+): void {
+  const gotTheLock = deps.requestSingleInstanceLock();
+  if (!gotTheLock) {
+    deps.quitApp();
+    return;
+  }
+
+  deps.onSecondInstance((_event, argv) => {
+    deps.handleCliCommand(deps.parseArgs(argv), "second-instance");
+  });
+
+  if (initialArgs.help && !deps.shouldStartApp(initialArgs)) {
+    deps.printHelp();
+    deps.quitApp();
+    return;
+  }
+
+  if (!deps.shouldStartApp(initialArgs)) {
+    if (initialArgs.stop && !initialArgs.start) {
+      deps.quitApp();
+    } else {
+      deps.logNoRunningInstance();
+      deps.quitApp();
+    }
+    return;
+  }
+
+  deps.whenReady(async () => {
+    await deps.onReady();
+  });
+
+  deps.onWindowAllClosed(() => {
+    if (!deps.isDarwinPlatform()) {
+      deps.quitApp();
+    }
+  });
+
+  deps.onWillQuit(() => {
+    deps.onWillQuitCleanup();
+  });
+
+  deps.onActivate(() => {
+    if (deps.shouldRestoreWindowsOnActivate()) {
+      deps.restoreWindowsOnActivate();
+    }
+  });
+}