[Offline pages] Create offline internals page for Android

chrome/browser/resources/offline_pages/offline_internals.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+cr.define('offlineInternals', function() {
+  'use strict';
+
+  /**
+   * @typedef {{
+   *   onlineUrl: string,
+   *   creationTime: number,
+   *   status: number,
+   *   id: string,
+   *   namespace: string,
+   *   size: string,
+   *   filePath: string,
+   *   lastAccessTime: number,
+   *   accessCount: number
+   *  }}
+   */
+  var OfflinePageItem;
+
+  /**
+   * @typedef {{
+   *   status: string,
+   *   onlineUrl: string,
+   *   creationTime: number,
+   *   id: string,
+   *   namespace: string,
+   *   attemptCount: number
+   * }}
+   */
+  var SavePageRequest;
+
+  /**
+   * Clear the specified table.
+   * @param {string} tableId id of the table to clear.
+   */
+  function clearTable(tableId) {
+    $(tableId).textContent = '';
+  }
+
+  /**
+   * Fill stored pages table.
+   * @param {HTMLElement} element A HTML element.
+   * @param {!Array<OfflinePageItem>} pages An array object representing
+   *     stored offline pages.
+   */
+  function fillStoredPages(element, pages) {
+    for (var i = 0; i < pages.length; i++) {
+      var row = document.createElement('tr');
+
+      var checkboxCell = document.createElement('td');
+      var checkbox = document.createElement('input');
+      checkbox.setAttribute('type', 'checkbox');
+      checkbox.setAttribute('name', 'stored');
+      checkbox.setAttribute('value', pages[i].id);
+
+      checkboxCell.appendChild(checkbox);
+      row.appendChild(checkboxCell);
+
+      var cell = document.createElement('td');
+      cell.textContent = pages[i].onlineUrl;
+      row.appendChild(cell);
+
+      cell = document.createElement('td');
+      cell.textContent = pages[i].namespace;
+      row.appendChild(cell);
+
+      cell = document.createElement('td');
+      cell.textContent = pages[i].size;
+      row.appendChild(cell);
+
+      element.appendChild(row);
+    }
+  }
+
+  /**
+   * Fill requests table.
+   * @param {HTMLElement} element A HTML element.
+   * @param {!Array<SavePageRequest>} requests An array object representing
+   *     the request queue.
+   */
+  function fillRequestQueue(element, requests) {
+    for (var i = 0; i < requests.length; i++) {
+      var row = document.createElement('tr');
+
+      var cell = document.createElement('td');
+      cell.textContent = requests[i].onlineUrl;
+      row.appendChild(cell);
+
+      cell = document.createElement('td');
+      cell.textContent = new Date(requests[i].creationTime);
+      row.appendChild(cell);
+
+      cell = document.createElement('td');
+      cell.textContent = requests[i].status;
+      row.appendChild(cell);
+
+      element.appendChild(row);
+    }
+  }
+
+  /**
+   * Refresh all displayed information.
+   */
+  function refreshAll() {
+    cr.sendWithPromise('getOfflineInternalsInfo').then(setOfflineInternalsInfo);
+  }
+
+  /**
+   * Delete all pages in the offline store.
+   */
+  function deleteAllPages() {
+    cr.sendWithPromise('deleteAllPages').then(pagesDeleted);
+  }
+
+  /**
+   * Callback when pages are deleted.
+   * @param {string} deletePageStatus The status of delete page call.
+   */
+  function pagesDeleted(deletePageStatus) {
+    // TODO(chili): decide what to do here. Perhaps a refresh of just
+    // the stored pages table?
+  }
+
+  /**
+   * Callback when information is loaded.
+   * @param {{AllPages: !Array<OfflinePageItem>,
+   *          Queue: !Array<SavePageRequest>}} info An object containing both
+   *     stored pages and request queue status.
+   */
+  function setOfflineInternalsInfo(info) {
+    clearTable('stored-pages');
+    clearTable('request-queue');
+
+    fillStoredPages($('stored-pages'), info.AllPages);
+    fillRequestQueue($('request-queue'), info.Queue);
+  }
+
+  /**
+   * Delete selected pages from the offline store.
+   */
+  function deleteSelectedPages() {
+    var checkboxes = document.getElementsByName('stored');
+    var selectedIds = [];
+    for (var checkbox of checkboxes) {
+      if (checkbox.checked)
+        selectedIds.push(checkbox.value);
+    }
+
+    cr.sendWithPromise('deleteSelectedPages', selectedIds).then(pagesDeleted);
+  }
+
+  function initialize() {
+    $('clear-all').onclick = deleteAllPages;
+    $('clear-selected').onclick = deleteSelectedPages;
+    $('refresh').onclick = refreshAll;
+    refreshAll();
+  }
+
+  // Return an object with all of the exports.
+  return {
+    initialize: initialize,
+  };
+});
+
+document.addEventListener('DOMContentLoaded', offlineInternals.initialize);