add snippets.json migration dialog

Author: aaronjanse

src/index.js

@@ -1,38 +1,38 @@
 'use strict';
 const electron = require('electron');
-const {app, BrowserWindow, Menu, protocol, ipcMain} = require('electron');
+const { app, BrowserWindow, Menu, protocol, ipcMain, dialog } = require('electron');
 
 const log = require('electron-log');
-const {autoUpdater} = require("electron-updater");
+const { autoUpdater } = require("electron-updater");
 
 autoUpdater.logger = log;
 autoUpdater.logger.transports.file.level = 'info';
 log.info('App starting...');
 
 function sendStatusToWindow(text) {
-  log.info(text);
-  mainWindow.webContents.send('message', text);
+	log.info(text);
+	mainWindow.webContents.send('message', text);
 }
 autoUpdater.on('checking-for-update', () => {
-  sendStatusToWindow('Checking for update...');
+	sendStatusToWindow('Checking for update...');
 })
 autoUpdater.on('update-available', (info) => {
-  sendStatusToWindow('Update available.');
+	sendStatusToWindow('Update available.');
 })
 autoUpdater.on('update-not-available', (info) => {
-  sendStatusToWindow('Update not available.');
+	sendStatusToWindow('Update not available.');
 })
 autoUpdater.on('error', (err) => {
-  sendStatusToWindow('Error in auto-updater. ' + err);
+	sendStatusToWindow('Error in auto-updater. ' + err);
 })
 autoUpdater.on('download-progress', (progressObj) => {
-  let log_message = "Download speed: " + progressObj.bytesPerSecond;
-  log_message = log_message + ' - Downloaded ' + progressObj.percent + '%';
-  log_message = log_message + ' (' + progressObj.transferred + "/" + progressObj.total + ')';
-  sendStatusToWindow(log_message);
+	let log_message = "Download speed: " + progressObj.bytesPerSecond;
+	log_message = log_message + ' - Downloaded ' + progressObj.percent + '%';
+	log_message = log_message + ' (' + progressObj.transferred + "/" + progressObj.total + ')';
+	sendStatusToWindow(log_message);
 })
 autoUpdater.on('update-downloaded', (info) => {
-  sendStatusToWindow('Update downloaded');
+	sendStatusToWindow('Update downloaded');
 });
 
 var fs = require('fs');
@@ -84,15 +84,48 @@ const path = require('path');
 const data_file_path = path.join(app.getPath('userData'), 'snippets.json');
 
 ipc.on('get_snippets', (event, arg) => {
-	fs.readFile(data_file_path, 'utf8', function(err, data) {
+	fs.readFile(data_file_path, 'utf8', function (err, data) {
 		if (err) {
 			// try to recover existing snippet data from old version
-			fs.readFile('snippets.json', 'utf8', function(err_, data_) {
+			fs.readFile('snippets.json', 'utf8', function (err_, data_) {
 				if (err_) {
-					event.returnValue = null;
-					return console.error();(err_);
+					// ask the user to manually select the old snippets.json
+					let is_new_user = dialog.showMessageBox(mainWindow, {
+						'type': 'question',
+						'buttons': ['Yes', 'No'],
+						'title': 'Have you created any snippets?',
+						'message': 'Have you created any snippets yet?\n\nIf so, they need to be migrated to the new storage location.'
+					})
+					if (is_new_user == 1) {
+						event.returnValue = null;
+						return;
+					}
+					dialog.showMessageBox(mainWindow, {
+						'type': 'info',
+						'message': 'You will be prompted to choose a file named snippets.json using the file chooser.\n\nLook in the repo\'s src/ directory.'
+					})
+					let old_snippets_path = dialog.showOpenDialog(mainWindow, {
+						'type': 'warning',
+						'title': 'Choose the snippets.json file from the local repo\'s src/ directory',
+						'message': 'Choose the snippets.json file from the local repo\'s src/ directory',
+						'filters': [
+							{
+								'name': 'JSON',
+								'extensions': ['json']
+							}
+						]
+					})[0]
+					fs.readFile(old_snippets_path, 'utf8', function (err, data) {
+						if (err) {
+							event.returnValue = null;
+							return console.error(); (err);
+						} else {
+							fs.writeFile(data_file_path, data, 'utf8', function () { });
+							event.returnValue = data;
+						}
+					})
 				} else {
-					fs.writeFile(data_file_path, data_, 'utf8', function(){});
+					fs.writeFile(data_file_path, data_, 'utf8', function () { });
 					event.returnValue = data_;
 				}
 			});
@@ -103,6 +136,6 @@ ipc.on('get_snippets', (event, arg) => {
 });
 
 ipc.on('save_snippets', (event, snippets) => {
-	fs.writeFile(data_file_path, snippets, 'utf8', function(){});
+	fs.writeFile(data_file_path, snippets, 'utf8', function () { });
 	event.returnValue = 1; // Required for sendSync or it hangs forever! You can send back anything here.
 });