fix: open files via double-click & cli args (#619)

* fix: open file cli arg

* fix: open file on mac

src/electron/main.ts

@@ -17,10 +17,16 @@ const CONTEXT: AppContext = Mobx.observable({
 	sender: undefined,
 	win: undefined,
 	hot: undefined,
-	middlewares: []
+	middlewares: [],
+	fileToOpen: undefined
 });
 
 async function main(): Promise<void> {
+	if (process.argv.length > 1) {
+		const fileToOpenArg = process.argv[1];
+		CONTEXT.fileToOpen = fileToOpenArg;
+	}
+
 	const args = yargsParser(process.argv.slice(2));
 	CONTEXT.hot = args.hot || false;
 	CONTEXT.base = args.base || '';
@@ -67,6 +73,16 @@ async function main(): Promise<void> {
 	});
 }
 
+Electron.app.on('open-file', async (event, path) => {
+	event.preventDefault();
+
+	if (!path) {
+		return;
+	}
+
+	CONTEXT.fileToOpen = path;
+});
+
 Electron.app.on('ready', main);
 
 Electron.app.on('window-all-closed', () => {

src/electron/start-app.ts

@@ -8,6 +8,7 @@ import * as getPort from 'get-port';
 import * as Message from '../message';
 import * as Mobx from 'mobx';
 import * as Model from '../model';
+import * as Fs from 'fs';
 import { Sender } from '../sender/server';
 import { showMainMenu } from './show-main-menu';
 import { createServer } from '../server';
@@ -26,6 +27,7 @@ export interface AppContext {
 	sender: undefined | Sender;
 	win: undefined | Electron.BrowserWindow;
 	middlewares: Express.RequestHandler[];
+	fileToOpen: string | undefined;
 }
 
 export async function startApp(ctx: AppContext): Promise<{ emitter: Events.EventEmitter }> {
@@ -66,30 +68,37 @@ export async function startApp(ctx: AppContext): Promise<{ emitter: Events.Event
 
 	server.on('client-message', e => sender.send(e));
 
-	const onClose = e => {
-		e.preventDefault();
-		sender.send({
-			type: Message.MessageType.WindowClose,
-			id: uuid.v4(),
-			payload: undefined
-		});
-	};
-
-	Electron.app.on('will-finish-launching', () => {
-		Electron.app.on('open-file', async (event, path) => {
-			event.preventDefault();
+	Mobx.reaction(
+		() => ctx.fileToOpen,
+		() => {
+			if (!ctx.fileToOpen) {
+				return;
+			}
 
-			if (!path) {
+			// TODO: Move check to persistence.read and return appropriate error message.
+			if (!Fs.existsSync(ctx.fileToOpen)) {
 				return;
 			}
 
 			sender.send({
 				id: uuid.v4(),
 				type: Message.MessageType.OpenFileRequest,
-				payload: { path }
+				payload: { path: ctx.fileToOpen }
 			});
+		},
+		{
+			fireImmediately: true
+		}
+	);
+
+	const onClose = e => {
+		e.preventDefault();
+		sender.send({
+			type: Message.MessageType.WindowClose,
+			id: uuid.v4(),
+			payload: undefined
 		});
-	});
+	};
 
 	Electron.app.on('before-quit', async () => {
 		await Mobx.when(() => typeof ctx.project === 'undefined');