Site Settings: Implement dialog for adding site exceptions.

chrome/browser/resources/settings/site_settings/add_site_dialog.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.
+
+/**
+ * @fileoverview
+ * 'add-site-dialog' provides a dialog to add exceptions for a given Content
+ * Settings category.
+ */
+Polymer({
+  is: 'add-site-dialog',
+
+  behaviors: [SiteSettingsBehavior],
+
+  properties: {
+    /**
+     * The site to add an exception for.
+     * @private
+     */
+    site_: String,
+  },
+
+  /** Opens the dialog. */
+  open: function() {
+    this.$.dialog.open();
+  },
+
+  /**
+   * Validates that the pattern entered is valid.
+   * @private
+   */
+  validate_: function() {
+    var pattern = this.addPatternWildcard_(this.site_);
+    this.browserProxy.isPatternValid(pattern).then(function(isValid) {
+      this.$.add.disabled = !isValid;
+    }.bind(this));
+  },
+
+  /**
+   * Adds the wildcard prefix to a pattern string.
+   * @param {string} pattern The pattern to add the wildcard to.
+   * @return {string} The resulting pattern.
+   * @private
+   */
+  addPatternWildcard_: function(pattern) {
+    if (pattern.startsWith('http://'))
+      return pattern.replace('http://', 'http://[*.]');
+    else if (pattern.startsWith('https://'))
+      return pattern.replace('https://', 'https://[*.]');
+    else
+      return '[*.]' + pattern;
+  },
+
+  /**
+   * The tap handler for the Add [Site] button (adds the pattern and closes
+   * the dialog).
+   * @private
+   */
+  onAddTap_: function() {
+    var pattern = this.addPatternWildcard_(this.site_);
+    this.setCategoryPermissionForOrigin(
+        pattern, pattern, this.category, settings.PermissionValues.ALLOW);
+    this.$.dialog.close();
+  },
+});