Abstract PolyGerrit router

Set up the mechanism for generating URLs and triggering navigation in PG
components in a way that is decoupled from page.js and gr-router.
Upgrade some components to use this system.

Feature: Issue 6446
Change-Id: Idc18cbd87b8e4e05d24ae6a5feb0a0a43f47fd7f

polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.html

@@ -19,6 +19,8 @@ limitations under the License.
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
 <link rel="import" href="../../../bower_components/iron-input/iron-input.html">
 
+<link rel="import" href="../../core/gr-navigation/gr-navigation.html">
+
 <link rel="import" href="../../shared/gr-button/gr-button.html">
 <link rel="import" href="../../shared/gr-dropdown/gr-dropdown.html">
 <link rel="import" href="../../shared/gr-js-api-interface/gr-js-api-interface.html">

polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.js

@@ -842,9 +842,8 @@
                     'uploaded to this change.',
                 action: 'Reload',
                 callback: () => {
-                    // Load the current change without any patch range.
+                  // Load the current change without any patch range.
-                  location.href = `${this.getBaseUrl()}/c/${
+                  Gerrit.Nav.navigateToChange(this.change);
-                      this.change._number}`;
                 },
               });
               cleanupFn();

polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.html

@@ -14,11 +14,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 -->
 
-<link rel="import" href="../../../behaviors/base-url-behavior/base-url-behavior.html">
-<link rel="import" href="../../../behaviors/gr-url-encoding-behavior.html">
 <link rel="import" href="../../../behaviors/rest-client-behavior/rest-client-behavior.html">
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
 <link rel="import" href="../../plugins/gr-external-style/gr-external-style.html">
+<link rel="import" href="../../core/gr-navigation/gr-navigation.html">
 <link rel="import" href="../../shared/gr-account-chip/gr-account-chip.html">
 <link rel="import" href="../../shared/gr-date-formatter/gr-date-formatter.html">
 <link rel="import" href="../../shared/gr-editable-label/gr-editable-label.html">

polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata.js

@@ -57,9 +57,7 @@
     },
 
     behaviors: [
-      Gerrit.BaseUrlBehavior,
       Gerrit.RESTClientBehavior,
-      Gerrit.URLEncodingBehavior,
     ],
 
     observers: [
@@ -266,27 +264,17 @@
     },
 
     _computeProjectURL(project) {
-      return this.getBaseUrl() + '/q/project:' +
+      return Gerrit.Nav.getUrlForProject(project);
-        this.encodeURL(project, false);
     },
 
     _computeBranchURL(project, branch) {
-      let status;
+      return Gerrit.Nav.getUrlForBranch(branch, project,
-      if (this.change.status == this.ChangeStatus.NEW) {
+          this.change.status == this.ChangeStatus.NEW ? 'open' :
-        status = 'open';
+              this.change.status.toLowerCase());
-      } else {
-        status = this.change.status.toLowerCase();
-      }
-      return this.getBaseUrl() + '/q/project:' +
-        this.encodeURL(project, false) +
-          ' branch:' + this.encodeURL(branch, false) +
-              ' status:' + this.encodeURL(status, false);
     },
 
     _computeTopicURL(topic) {
-      return this.getBaseUrl() + '/q/topic:' +
+      return Gerrit.Nav.getUrlForTopic(topic);
-          this.encodeURL('"' + topic + '"', false) +
-            '+(status:open OR status:merged)';
     },
 
     _handleTopicRemoved() {

polygerrit-ui/app/elements/change/gr-change-metadata/gr-change-metadata_test.html

@@ -300,12 +300,6 @@ limitations under the License.
             });
       });
 
-      test('topic href has quotes', () => {
-        const hrefArr = element._computeTopicURL('test')
-            .split('%2522'); // Double-escaped quote.
-        assert.equal(hrefArr[1], 'test');
-      });
-
       test('topic removal', () => {
         sandbox.stub(element.$.restAPI, 'setChangeTopic').returns(
             Promise.resolve());

polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.html

@@ -14,11 +14,11 @@ See the License for the specific language governing permissions and
 limitations under the License.
 -->
 
-<link rel="import" href="../../../behaviors/base-url-behavior/base-url-behavior.html">
 <link rel="import" href="../../../behaviors/gr-patch-set-behavior/gr-patch-set-behavior.html">
 <link rel="import" href="../../../behaviors/keyboard-shortcut-behavior/keyboard-shortcut-behavior.html">
 <link rel="import" href="../../../behaviors/rest-client-behavior/rest-client-behavior.html">
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
+<link rel="import" href="../../core/gr-navigation/gr-navigation.html">
 <link rel="import" href="../../diff/gr-diff-preferences/gr-diff-preferences.html">
 <link rel="import" href="../../shared/gr-account-link/gr-account-link.html">
 <link rel="import" href="../../shared/gr-select/gr-select.html">
@@ -316,7 +316,7 @@ limitations under the License.
               change="{{_change}}" hidden$="[[!_loggedIn]]"></gr-change-star>
           <a
               aria-label$="[[_computeChangePermalinkAriaLabel(_change._number)]]"
-              href$="[[_computeChangePermalink(_change._number)]]">[[_change._number]]</a><!--
+              href$="[[_computeChangeUrl(_change)]]">[[_change._number]]</a><!--
        --><template is="dom-if" if="[[_changeStatus]]"><!--
          --> (<!--
          --><span
@@ -471,7 +471,7 @@ limitations under the License.
                 commit-info="[[_commitInfo]]"></gr-commit-info>
             <span class="latestPatchContainer">
               /
-              <a href$="[[getBaseUrl()]]/c/[[_change._number]]">Go to latest patch set</a>
+              <a href$="[[_computeChangeUrl(_change)]]">Go to latest patch set</a>
             </span>
             <span class="downloadContainer desktop">
               /

polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js

@@ -183,7 +183,6 @@
     },
 
     behaviors: [
-      Gerrit.BaseUrlBehavior,
       Gerrit.KeyboardShortcutBehavior,
       Gerrit.PatchSetBehavior,
       Gerrit.RESTClientBehavior,
@@ -632,8 +631,8 @@
       page.show(this.changePath(this._changeNum) + '/' + patchExpr);
     },
 
-    _computeChangePermalink(changeNum) {
+    _computeChangeUrl(change) {
-      return this.getBaseUrl() + '/' + changeNum;
+      return Gerrit.Nav.getUrlForChange(change);
     },
 
     _computeChangeStatus(change, patchNum) {
@@ -1288,8 +1287,7 @@
                   action: 'Reload',
                   callback: function() {
                     // Load the current change without any patch range.
-                    location.href = this.getBaseUrl() + '/c/' +
+                    Gerrit.Nav.navigateToChange(this._change);
-                        this._change._number;
                   }.bind(this),
                 });
               }

polygerrit-ui/app/elements/core/gr-navigation/gr-navigation.html

@@ -0,0 +1,152 @@
+<!--
+Copyright (C) 2017 The Android Open Source Project
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+<script>
+  (function(window) {
+    'use strict';
+
+    // Navigation parameters object format:
+    //
+    // Each object has a `view` property with a value from Gerrit.Nav.View. The
+    // remaining properties depend on the value used for view.
+    //
+    //  - Gerrit.Nav.View.CHANGE:
+    //    - `id`, required, String: the numeric ID of the change.
+    //
+    // - Gerrit.Nav.View.SEARCH:
+    //    - `owner`, optional, String: the owner name.
+    //    - `project`, optional, String: the project name.
+    //    - `branch`, optional, String: the branch name.
+    //    - `topic`, optional, String: the topic name.
+    //    - `statuses`, optional, Array<String>: the list of change statuses to
+    //        search for. If more than one is provided, the search will OR them
+    //        together.
+
+    window.Gerrit = window.Gerrit || {};
+
+    // Prevent redefinition.
+    if (window.Gerrit.hasOwnProperty('Nav')) { return; }
+
+    const uninitialized = () => {
+      console.warn('Use of uninitialized routing');
+    };
+
+    window.Gerrit.Nav = {
+
+      View: {
+        CHANGE: 'change',
+        SEARCH: 'search',
+      },
+
+      /** @type {Function} */
+      _navigate: uninitialized,
+
+      /** @type {Function} */
+      _generateUrl: uninitialized,
+
+      /**
+       * Setup router implementation.
+       * @param {Function} handleNavigate
+       * @param {Function} generateUrl
+       */
+      setup(navigate, generateUrl) {
+        this._navigate = navigate;
+        this._generateUrl = generateUrl;
+      },
+
+      destroy() {
+        this._navigate = uninitialized;
+        this._generateUrl = uninitialized;
+      },
+
+      /**
+       * Generate a URL for the given route parameters.
+       * @param {Object} params
+       * @return {String}
+       */
+      _getUrlFor(params) {
+        return this._generateUrl(params);
+      },
+
+      /**
+       * @param {String} project The name of the project.
+       * @return {String}
+       */
+      getUrlForProject(project) {
+        return this._getUrlFor({
+          view: Gerrit.Nav.View.SEARCH,
+          project,
+        });
+      },
+
+      /**
+       * @param {String} branch The name of the branch.
+       * @param {String} project The name of the project.
+       * @param {String} status The status to search.
+       * @return {String}
+       */
+      getUrlForBranch(branch, project, status) {
+        return this._getUrlFor({
+          view: Gerrit.Nav.View.SEARCH,
+          branch,
+          project,
+          statuses: [status],
+        });
+      },
+
+      /**
+       * @param {String} topic The name of the topic.
+       * @return {String}
+       */
+      getUrlForTopic(topic) {
+        return this._getUrlFor({
+          view: Gerrit.Nav.View.SEARCH,
+          topic,
+          statuses: ['open', 'merged'],
+        });
+      },
+
+      /**
+       * @param {Object} change The change object.
+       * @return {String}
+       */
+      getUrlForChange(change) {
+        return this._getUrlFor({
+          view: Gerrit.Nav.View.CHANGE,
+          id: change._number,
+        });
+      },
+
+      /**
+       * @param {Object} change The change object.
+       * @return {String}
+       */
+      navigateToChange(change) {
+        this._navigate(this.getUrlForChange(change));
+      },
+
+      /**
+       * @param {String} owner The name of the owner.
+       * @return {String}
+       */
+      getUrlForOwner(owner) {
+        return this._getUrlFor({
+          view: Gerrit.Nav.View.SEARCH,
+          owner,
+        });
+      },
+    };
+  })(window);
+</script>

polygerrit-ui/app/elements/core/gr-router/gr-router.html

@@ -14,7 +14,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 -->
 <link rel="import" href="../../../behaviors/base-url-behavior/base-url-behavior.html">
+<link rel="import" href="../../../behaviors/gr-url-encoding-behavior.html">
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
+<link rel="import" href="../../core/gr-navigation/gr-navigation.html">
 <link rel="import" href="../../shared/gr-rest-api-interface/gr-rest-api-interface.html">
 <link rel="import" href="../gr-reporting/gr-reporting.html">
 

polygerrit-ui/app/elements/core/gr-router/gr-router.js

@@ -37,7 +37,11 @@
     getReporting().timeEnd('WebComponentsReady');
   });
 
-  function startRouter() {
+  function encode(s) {
+    return window.Gerrit.URLEncodingBehavior.encodeURL(s, false);
+  }
+
+  function startRouter(generateUrl) {
     const base = window.Gerrit.BaseUrlBehavior.getBaseUrl();
     if (base) {
       page.base(base);
@@ -46,6 +50,8 @@
     const restAPI = document.createElement('gr-rest-api-interface');
     const reporting = getReporting();
 
+    Gerrit.Nav.setup(url => { page.show(url); }, generateUrl);
+
     // Middleware
     page((ctx, next) => {
       document.body.scrollTop = 0;
@@ -352,7 +358,45 @@
     is: 'gr-router',
     start() {
       if (!app) { return; }
-      startRouter();
+      startRouter(this._generateUrl);
+    },
+
+    _generateUrl(params) {
+      const base = window.Gerrit.BaseUrlBehavior.getBaseUrl();
+      let url = '';
+
+      if (params.view === Gerrit.Nav.View.SEARCH) {
+        const operators = [];
+        if (params.owner) {
+          operators.push('owner:' + encode(params.owner));
+        }
+        if (params.project) {
+          operators.push('project:' + encode(params.project));
+        }
+        if (params.branch) {
+          operators.push('branch:' + encode(params.branch));
+        }
+        if (params.topic) {
+          operators.push('topic:"' + encode(params.topic) + '"');
+        }
+        if (params.statuses) {
+          if (params.statuses.length === 1) {
+            operators.push('status:' + encode(params.statuses[0]));
+          } else if (params.statuses.length > 1) {
+            operators.push(
+                '(' +
+                params.statuses.map(s => `status:${encode(s)}`).join(' OR ') +
+                ')');
+          }
+        }
+        url = '/q/' + operators.join('+');
+      } else if (params.view === Gerrit.Nav.View.CHANGE) {
+        url = '/c/' + params.id;
+      } else {
+        throw new Error('Can\'t generate');
+      }
+
+      return base + url;
     },
   });
 })();

polygerrit-ui/app/elements/core/gr-router/gr-router_test.html

@@ -0,0 +1,73 @@
+<!DOCTYPE html>
+<!--
+Copyright (C) 2017 The Android Open Source Project
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
+<title>gr-router</title>
+
+<script src="../../../bower_components/webcomponentsjs/webcomponents-lite.min.js"></script>
+<script src="../../../bower_components/web-component-tester/browser.js"></script>
+<link rel="import" href="../../../test/common-test-setup.html"/>
+<link rel="import" href="gr-router.html">
+
+<script>void(0);</script>
+
+<test-fixture id="basic">
+  <template>
+    <gr-router></gr-router>
+  </template>
+</test-fixture>
+
+<script>
+  suite('gr-router tests', () => {
+    suite('generateUrl', () => {
+      let element;
+
+      setup(() => {
+        element = fixture('basic');
+      });
+
+      test('search', () => {
+        let params = {
+          view: Gerrit.Nav.View.SEARCH,
+          owner: 'a%b',
+          project: 'c%d',
+          branch: 'e%f',
+          topic: 'g%h',
+          statuses: ['op%en'],
+        };
+        assert.equal(element._generateUrl(params),
+            '/q/owner:a%2525b+project:c%2525d+branch:e%2525f+' +
+            'topic:"g%2525h"+status:op%2525en');
+
+        params = {
+          view: Gerrit.Nav.View.SEARCH,
+          statuses: ['a', 'b', 'c'],
+        };
+        assert.equal(element._generateUrl(params),
+            '/q/(status:a OR status:b OR status:c)');
+      });
+
+      test('change', () => {
+        const params = {
+          view: Gerrit.Nav.View.CHANGE,
+          id: '1234',
+        };
+        assert.equal(element._generateUrl(params), '/c/1234');
+      });
+    });
+  });
+</script>

polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.html

@@ -16,6 +16,7 @@ limitations under the License.
 
 <link rel="import" href="../../../behaviors/base-url-behavior/base-url-behavior.html">
 <link rel="import" href="../../../bower_components/polymer/polymer.html">
+<link rel="import" href="../../core/gr-navigation/gr-navigation.html">
 <link rel="import" href="../gr-account-label/gr-account-label.html">
 <link rel="import" href="../../../styles/shared-styles.html">
 

polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link.js

@@ -31,8 +31,7 @@
 
     _computeOwnerLink(account) {
       if (!account) { return; }
-      const accountID = account.email || account._account_id;
+      return Gerrit.Nav.getUrlForOwner(account.email || account._account_id);
-      return this.getBaseUrl() + '/q/owner:' + encodeURIComponent(accountID);
     },
 
     _computeShowEmail(account) {

polygerrit-ui/app/elements/shared/gr-account-link/gr-account-link_test.html

@@ -43,18 +43,7 @@ limitations under the License.
     });
 
     test('computed fields', () => {
-      assert.equal(element._computeOwnerLink(
-          {
-            _account_id: 123,
-            email: 'andybons+gerrit@gmail.com',
-          }),
-          '/q/owner:andybons%2Bgerrit%40gmail.com');
-
-      assert.equal(element._computeOwnerLink({_account_id: 42}),
-          '/q/owner:42');
-
       assert.equal(element._computeShowEmail({name: 'asd'}), false);
-
       assert.equal(element._computeShowEmail({}), true);
     });
   });

polygerrit-ui/app/test/common-test-setup.html

@@ -15,5 +15,5 @@ See the License for the specific language governing permissions and
 limitations under the License.
 -->
 
-<link rel="import"
+<link rel="import" href="../bower_components/iron-test-helpers/iron-test-helpers.html" />
-    href="../bower_components/iron-test-helpers/iron-test-helpers.html" />
+<link rel="import" href="test-router.html" />

polygerrit-ui/app/test/index.html

@@ -62,6 +62,7 @@ limitations under the License.
     'core/gr-account-dropdown/gr-account-dropdown_test.html',
     'core/gr-error-manager/gr-error-manager_test.html',
     'core/gr-main-header/gr-main-header_test.html',
+    'core/gr-router/gr-router_test.html',
     'core/gr-reporting/gr-reporting_test.html',
     'core/gr-search-bar/gr-search-bar_test.html',
     'diff/gr-diff-builder/gr-diff-builder_test.html',

polygerrit-ui/app/test/test-router.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<!--
+Copyright (C) 2017 The Android Open Source Project
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+<link rel="import" href="../elements/core/gr-navigation/gr-navigation.html">
+<script>
+  Gerrit.Nav.setup(url => { /* noop */ }, params => '');
+</script>