Save app state before quit

src/browser/tropy.js

@@ -5,11 +5,12 @@ const { resolve } = require('path')
 const { app, shell, BrowserWindow, ipcMain: ipc } = require('electron')
 const { verbose } = require('../common/log')
 const AppMenu = require('./menu')
+const Storage = require('./storage')
 const url = require('url')
 
 const pkg = require('../../package')
 
-const prop = Object.defineProperty
+const { defineProperty: prop } = Object
 
 module.exports = class Tropy extends EventEmitter {
 
@@ -22,6 +23,8 @@ module.exports = class Tropy extends EventEmitter {
     this.menu = new AppMenu(this)
     this.menu.load('app')
 
+    prop(this, 'store', { value: new Storage() })
+
     prop(this, 'debug', { value: debug })
     prop(this, 'environment', { value: environment || process.env.NODE_ENV })
 
@@ -33,6 +36,7 @@ module.exports = class Tropy extends EventEmitter {
       value: encode({ environment, debug, home: app.getPath('userData') })
     })
 
+    this.resume()
     this.listen()
   }
 
@@ -64,6 +68,21 @@ module.exports = class Tropy extends EventEmitter {
     })
   }
 
+  resume() {
+    return this.store
+      .load('state.json')
+      .catch({ code: 'ENOENT' }, () => ({}))
+
+      .then(state => {
+        this.state = state
+        this.emit('app:resume')
+      })
+  }
+
+  persist() {
+    return this.store.save.sync('state.json', this.state), this
+  }
+
   listen() {
     this
       .on('app:quit', () => app.quit())
@@ -94,7 +113,8 @@ module.exports = class Tropy extends EventEmitter {
 
     app
       .on('before-quit', () => {
-        verbose('saving state...')
+        verbose('saving app state')
+        this.persist()
       })
 
     ipc