Added export bookmars functionality

Resolves brave#1002

Auditors:
@bbondy @bsclifton

Test Plan:
- Go to Bookmards menu
- Select Export Bookmarks
- Select destination
- Bookmarks are exported and you see notification

app/bookmarksExporter.js

@@ -0,0 +1,32 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+'strict mode'
+
+const electron = require('electron')
+const dialog = electron.dialog
+const app = electron.app
+const BrowserWindow = electron.BrowserWindow
+const path = require('path')
+const moment = require('moment')
+const getSetting = require('../js/settings').getSetting
+const settings = require('../js/constants/settings')
+
+module.exports.dialog = () => {
+  const focusedWindow = BrowserWindow.getFocusedWindow()
+  const fileName = moment().format('DD_MM_YYYY') + '.html'
+  const defaultPath = path.join(getSetting(settings.DEFAULT_DOWNLOAD_SAVE_PATH) || app.getPath('downloads'), fileName)
+
+  dialog.showSaveDialog(focusedWindow, {
+    defaultPath: defaultPath,
+    filters: [{
+      name: 'HTML',
+      extensions: ['html']
+    }]
+  }, (filePath) => {
+    if (filePath) {
+      console.log(filePath)
+    }
+  })
+}

app/browser/menu.js

@@ -362,7 +362,8 @@ const createBookmarksSubmenu = () => {
     CommonMenu.bookmarksManagerMenuItem(),
     CommonMenu.bookmarksToolbarMenuItem(),
     CommonMenu.separatorMenuItem,
-    CommonMenu.importBrowserDataMenuItem()
+    CommonMenu.importBrowserDataMenuItem(),
+    CommonMenu.exportBookmarksMenuItem()
   ]
 
   const bookmarks = menuUtil.createBookmarkTemplateItems(appStore.getState().get('sites'))

app/common/commonMenu.js

@@ -249,6 +249,19 @@ module.exports.importBrowserDataMenuItem = () => {
   }
 }
 
+module.exports.exportBookmarksMenuItem = () => {
+  return {
+    label: locale.translation('exportBookmarks'),
+    click: function (item, focusedWindow) {
+      if (process.type === 'browser') {
+        process.emit(messages.EXPORT_BOOKMARKS)
+      } else {
+        electron.ipcRenderer.send(messages.EXPORT_BOOKMARKS)
+      }
+    }
+  }
+}
+
 module.exports.reportAnIssueMenuItem = () => {
   return {
     label: locale.translation('reportAnIssue'),

app/extensions/brave/locales/en-US/menu.properties

@@ -87,6 +87,7 @@ preferences=Preferences…
 settings=Settings…
 bookmarksManager=Bookmarks Manager…
 importBrowserData=Import Browser Data…
+exportBookmarks=Export Bookmarks…
 reportAnIssue=Report an Issue
 submitFeedback=Submit Feedback…
 bookmarksToolbar=Bookmarks Toolbar

app/index.js

@@ -77,6 +77,7 @@ const contentSettings = require('../js/state/contentSettings')
 const privacy = require('../js/state/privacy')
 const async = require('async')
 const settings = require('../js/constants/settings')
+const BookmarksExporter = require('./bookmarksExporter')
 
 // temporary fix for #4517, #4518 and #4472
 app.commandLine.appendSwitch('enable-use-zoom-for-dsf', 'false')
@@ -722,6 +723,11 @@ app.on('ready', () => {
       Importer.init()
     })
 
+    // TODO check if needed
+    ipcMain.on(messages.EXPORT_BOOKMARKS, () => {
+      BookmarksExporter.dialog()
+    })
+
     // This loads package.json into an object
     // TODO: Seems like this can be done with app.getVersion() insteand?
     PackageLoader.load((err, pack) => {
@@ -744,6 +750,11 @@ app.on('ready', () => {
       process.on(messages.IMPORT_BROWSER_DATA_NOW, () => {
         Importer.init()
       })
+
+      // This is fired by a menu entry
+      process.on(messages.EXPORT_BOOKMARKS, () => {
+        BookmarksExporter.dialog()
+      })
     })
     ready = true
   })

app/locale.js

@@ -158,6 +158,7 @@ var rendererIdentifiers = function () {
     'settings',
     'bookmarksManager',
     'importBrowserData',
+    'exportBookmarks',
     'reportAnIssue',
     'submitFeedback',
     'bookmarksToolbar',

js/constants/messages.js

@@ -115,6 +115,7 @@ const messages = {
   ABOUT_COMPONENT_INITIALIZED: _,
   CLEAR_BROWSING_DATA_NOW: _,
   IMPORT_BROWSER_DATA_NOW: _,
+  EXPORT_BOOKMARKS: _,
   IMPORTER_LIST: _,
   // Autofill
   AUTOFILL_SET_ADDRESS: _,