add ConfigManager & ZoomManager

browser/main/lib/ZoomManager.js

@@ -0,0 +1,30 @@
+import ConfigManager from './ConfigManager'
+
+const electron = require('electron')
+const { remote } = electron
+
+_init()
+
+function _init () {
+  setZoom(getZoom(), true)
+}
+
+function _saveZoom (zoomFactor) {
+  ConfigManager.set({zoom: zoomFactor})
+}
+
+function setZoom (zoomFactor, noSave = false) {
+  if (!noSave) _saveZoom(zoomFactor)
+  remote.getCurrentWebContents().setZoomFactor(zoomFactor)
+}
+
+function getZoom () {
+  let config = ConfigManager.get()
+
+  return config.zoom
+}
+
+export default {
+  setZoom,
+  getZoom
+}