Add more fields to Gerrit.Nav.View and utilize in app

Previously, the app relied on string matching of the view tag names in
order to perform view-based actions (e.g. routing).

This change refactors those instances to utilise the Gerrit.Nav.View
enum.

Bug: Issue 6708
Change-Id: If0212fde93e0167e3207af19006beee1a602df60
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view.html b/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view.html
index 0c5db71..b86d0f7 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view.html
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view.html
@@ -17,6 +17,7 @@
 <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-change-list/gr-change-list.html">
 <link rel="import" href="../../../styles/shared-styles.html">
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view.js b/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view.js
index 7c6f743..120dbd5 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view.js
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view.js
@@ -100,7 +100,7 @@
     },
 
     _paramsChanged(value) {
-      if (value.view != this.tagName.toLowerCase()) { return; }
+      if (value.view !== Gerrit.Nav.View.SEARCH) { return; }
 
       this._loading = true;
       this._query = value.query;
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view_test.html b/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view_test.html
index 039bee4..d70f0c9 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view_test.html
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list-view/gr-change-list-view_test.html
@@ -176,7 +176,7 @@
           done();
         });
 
-        element.params = {view: 'gr-change-list-view', query: CHANGE_ID};
+        element.params = {view: Gerrit.Nav.View.SEARCH, query: CHANGE_ID};
       });
 
       test('Searching for a change num redirects to change', done => {
@@ -187,7 +187,7 @@
           done();
         });
 
-        element.params = {view: 'gr-change-list-view', query: '1'};
+        element.params = {view: Gerrit.Nav.View.SEARCH, query: '1'};
       });
 
       test('Commit hash redirects to change', done => {
@@ -198,7 +198,7 @@
           done();
         });
 
-        element.params = {view: 'gr-change-list-view', query: COMMIT_HASH};
+        element.params = {view: Gerrit.Nav.View.SEARCH, query: COMMIT_HASH};
       });
 
       test('Searching for an invalid change ID searches', () => {
@@ -206,7 +206,7 @@
             .returns(Promise.resolve([]));
         const stub = sandbox.stub(page, 'show');
 
-        element.params = {view: 'gr-change-list-view', query: CHANGE_ID};
+        element.params = {view: Gerrit.Nav.View.SEARCH, query: CHANGE_ID};
         flushAsynchronousOperations();
 
         assert.isFalse(stub.called);
@@ -217,7 +217,7 @@
             .returns(Promise.resolve([{}, {}]));
         const stub = sandbox.stub(page, 'show');
 
-        element.params = {view: 'gr-change-list-view', query: CHANGE_ID};
+        element.params = {view: Gerrit.Nav.View.SEARCH, query: CHANGE_ID};
         flushAsynchronousOperations();
 
         assert.isFalse(stub.called);
diff --git a/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_test.html b/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_test.html
index b1dae64..0e73342 100644
--- a/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_test.html
+++ b/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_test.html
@@ -49,10 +49,10 @@
       const getChangesStub = sandbox.stub(element, '_getChanges',
           () => Promise.resolve());
 
-      element.params = {view: 'gr-dashboard-view'};
+      element.params = {view: Gerrit.Nav.View.DASHBOARD};
 
       assert.equal(getChangesStub.callCount, 1);
-      element.params = {view: 'gr-dashboard-view'};
+      element.params = {view: Gerrit.Nav.View.DASHBOARD};
       assert.equal(getChangesStub.callCount, 2);
     });
 
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js
index 2d7b0ac..4a43f47 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.js
@@ -429,7 +429,7 @@
     },
 
     _paramsChanged(value) {
-      if (value.view !== this.tagName.toLowerCase()) {
+      if (value.view !== Gerrit.Nav.View.CHANGE) {
         this._initialLoadComplete = false;
         return;
       }
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html
index 7250056..5d798b8 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html
@@ -614,7 +614,7 @@
       const relatedClearSpy = sandbox.spy(element.$.relatedChanges, 'clear');
 
       const value = {
-        view: 'gr-change-view',
+        view: Gerrit.Nav.View.CHANGE,
         patchNum: '1',
       };
       element._paramsChanged(value);
@@ -636,7 +636,7 @@
           () => { return Promise.resolve(); });
 
       const value = {
-        view: 'gr-change-view',
+        view: Gerrit.Nav.View.CHANGE,
       };
       element._paramsChanged(value);
       assert.isTrue(reloadStub.calledOnce);
@@ -1092,7 +1092,7 @@
 
         // simulate reloading component, which is done when route
         // changes to match a regex of change view type.
-        element._paramsChanged({view: 'gr-change-view'});
+        element._paramsChanged({view: Gerrit.Nav.View.CHANGE});
       });
 
       test('scrollTop is reset when new change is loaded', () => {
diff --git a/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html b/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html
index fef0f87..d61def1 100644
--- a/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html
+++ b/polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html
@@ -83,7 +83,7 @@
           </tr>
         </tbody>
         <!-- Change View -->
-        <tbody hidden$="[[!_computeInView(view, 'gr-change-view')]]" hidden>
+        <tbody hidden$="[[!_computeInView(view, 'change')]]" hidden>
           <tr>
             <td></td><td class="header">Navigation</td>
           </tr>
@@ -101,7 +101,7 @@
           </tr>
         </tbody>
         <!-- Diff View -->
-        <tbody hidden$="[[!_computeInView(view, 'gr-diff-view')]]" hidden>
+        <tbody hidden$="[[!_computeInView(view, 'diff')]]" hidden>
           <tr>
             <td></td><td class="header">Navigation</td>
           </tr>
@@ -136,7 +136,7 @@
 
       <table>
         <!-- Change List -->
-        <tbody hidden$="[[!_computeInView(view, 'gr-change-list-view')]]" hidden>
+        <tbody hidden$="[[!_computeInView(view, 'search')]]" hidden>
           <tr>
             <td></td><td class="header">Change list</td>
           </tr>
@@ -172,7 +172,7 @@
           </tr>
         </tbody>
         <!-- Dashboard -->
-        <tbody hidden$="[[!_computeInView(view, 'gr-dashboard-view')]]" hidden>
+        <tbody hidden$="[[!_computeInView(view, 'dashboard')]]" hidden>
           <tr>
             <td></td><td class="header">Dashboard</td>
           </tr>
@@ -200,7 +200,7 @@
           </tr>
         </tbody>
         <!-- Change View -->
-        <tbody hidden$="[[!_computeInView(view, 'gr-change-view')]]" hidden>
+        <tbody hidden$="[[!_computeInView(view, 'change')]]" hidden>
           <tr>
             <td></td><td class="header">Actions</td>
           </tr>
@@ -318,7 +318,7 @@
           </tr>
         </tbody>
         <!-- Diff View -->
-        <tbody hidden$="[[!_computeInView(view, 'gr-diff-view')]]" hidden>
+        <tbody hidden$="[[!_computeInView(view, 'diff')]]" hidden>
           <tr>
             <td></td><td class="header">Actions</td>
           </tr>
diff --git a/polygerrit-ui/app/elements/core/gr-navigation/gr-navigation.html b/polygerrit-ui/app/elements/core/gr-navigation/gr-navigation.html
index 77df2a6..ec8f7aa 100644
--- a/polygerrit-ui/app/elements/core/gr-navigation/gr-navigation.html
+++ b/polygerrit-ui/app/elements/core/gr-navigation/gr-navigation.html
@@ -57,9 +57,13 @@
     window.Gerrit.Nav = {
 
       View: {
+        ADMIN: 'admin',
         CHANGE: 'change',
-        SEARCH: 'search',
+        AGREEMENTS: 'agreements',
+        DASHBOARD: 'dashboard',
         DIFF: 'diff',
+        SEARCH: 'search',
+        SETTINGS: 'settings',
       },
 
       /** @type {Function} */
diff --git a/polygerrit-ui/app/elements/core/gr-router/gr-router.js b/polygerrit-ui/app/elements/core/gr-router/gr-router.js
index 214ece1..7102076 100644
--- a/polygerrit-ui/app/elements/core/gr-router/gr-router.js
+++ b/polygerrit-ui/app/elements/core/gr-router/gr-router.js
@@ -105,7 +105,7 @@
     page('/dashboard/(.*)', loadUser, data => {
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
-          data.params.view = 'gr-dashboard-view';
+          data.params.view = Gerrit.Nav.View.DASHBOARD;
           app.params = data.params;
         } else {
           page.redirect('/login/' + encodeURIComponent(data.canonicalPath));
@@ -118,7 +118,7 @@
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
           app.params = {
-            view: 'gr-admin-view',
+            view: Gerrit.Nav.View.ADMIN,
             adminView: 'gr-admin-group-list',
             offset: data.params[1] || 0,
             filter: null,
@@ -133,7 +133,7 @@
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
           app.params = {
-            view: 'gr-admin-view',
+            view: Gerrit.Nav.View.ADMIN,
             adminView: 'gr-admin-group-list',
             offset: data.params.offset,
             filter: data.params.filter,
@@ -148,7 +148,7 @@
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
           app.params = {
-            view: 'gr-admin-view',
+            view: Gerrit.Nav.View.ADMIN,
             adminView: 'gr-admin-group-list',
             filter: data.params.filter || null,
           };
@@ -161,7 +161,7 @@
     // Matches /admin/projects/<project>,branches[,<offset>].
     page(/^\/admin\/projects\/(.+),branches(,(.+))?$/, loadUser, data => {
       app.params = {
-        view: 'gr-admin-view',
+        view: Gerrit.Nav.View.ADMIN,
         adminView: 'gr-project-detail-list',
         detailType: 'branches',
         project: data.params[0],
@@ -173,7 +173,7 @@
     page('/admin/projects/:project,branches/q/filter::filter,:offset',
         loadUser, data => {
           app.params = {
-            view: 'gr-admin-view',
+            view: Gerrit.Nav.View.ADMIN,
             adminView: 'gr-project-detail-list',
             detailType: 'branches',
             project: data.params.project,
@@ -185,7 +185,7 @@
     page('/admin/projects/:project,branches/q/filter::filter',
         loadUser, data => {
           app.params = {
-            view: 'gr-admin-view',
+            view: Gerrit.Nav.View.ADMIN,
             adminView: 'gr-project-detail-list',
             detailType: 'branches',
             project: data.params.project,
@@ -196,7 +196,7 @@
     // Matches /admin/projects/<project>,tags[,<offset>].
     page(/^\/admin\/projects\/(.+),tags(,(.+))?$/, loadUser, data => {
       app.params = {
-        view: 'gr-admin-view',
+        view: Gerrit.Nav.View.ADMIN,
         adminView: 'gr-project-detail-list',
         detailType: 'tags',
         project: data.params[0],
@@ -208,7 +208,7 @@
     page('/admin/projects/:project,tags/q/filter::filter,:offset',
         loadUser, data => {
           app.params = {
-            view: 'gr-admin-view',
+            view: Gerrit.Nav.View.ADMIN,
             adminView: 'gr-project-detail-list',
             detailType: 'tags',
             project: data.params.project,
@@ -220,7 +220,7 @@
     page('/admin/projects/:project,tags/q/filter::filter',
         loadUser, data => {
           app.params = {
-            view: 'gr-admin-view',
+            view: Gerrit.Nav.View.ADMIN,
             adminView: 'gr-project-detail-list',
             detailType: 'tags',
             project: data.params.project,
@@ -231,7 +231,7 @@
     // Matches /admin/projects[,<offset>][/].
     page(/^\/admin\/projects(,(\d+))?(\/)?$/, loadUser, data => {
       app.params = {
-        view: 'gr-admin-view',
+        view: Gerrit.Nav.View.ADMIN,
         adminView: 'gr-admin-project-list',
         offset: data.params[1] || 0,
         filter: null,
@@ -240,7 +240,7 @@
 
     page('/admin/projects/q/filter::filter,:offset', loadUser, data => {
       app.params = {
-        view: 'gr-admin-view',
+        view: Gerrit.Nav.View.ADMIN,
         adminView: 'gr-admin-project-list',
         offset: data.params.offset,
         filter: data.params.filter,
@@ -249,7 +249,7 @@
 
     page('/admin/projects/q/filter::filter', loadUser, data => {
       app.params = {
-        view: 'gr-admin-view',
+        view: Gerrit.Nav.View.ADMIN,
         adminView: 'gr-admin-project-list',
         filter: data.params.filter || null,
       };
@@ -258,7 +258,7 @@
     // Matches /admin/projects/<project>
     page(/^\/admin\/projects\/(.+)$/, loadUser, data => {
       app.params = {
-        view: 'gr-admin-view',
+        view: Gerrit.Nav.View.ADMIN,
         project: data.params[0],
         adminView: 'gr-project',
       };
@@ -268,7 +268,7 @@
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
           app.params = {
-            view: 'gr-admin-view',
+            view: Gerrit.Nav.View.ADMIN,
             adminView: 'gr-admin-plugin-list',
           };
         } else {
@@ -280,7 +280,7 @@
     page('/admin/(.*)', loadUser, data => {
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
-          data.params.view = 'gr-admin-view';
+          data.params.view = Gerrit.Nav.View.ADMIN;
           data.params.placeholder = true;
           app.params = data.params;
         } else {
@@ -290,7 +290,7 @@
     });
 
     function queryHandler(data) {
-      data.params.view = 'gr-change-list-view';
+      data.params.view = Gerrit.Nav.View.SEARCH;
       app.params = data.params;
     }
 
@@ -349,7 +349,7 @@
         changeNum: ctx.params[0],
         basePatchNum: ctx.params[3],
         patchNum: ctx.params[5],
-        view: 'gr-change-view',
+        view: Gerrit.Nav.View.CHANGE,
       };
 
       // Don't allow diffing the same patch number against itself.
@@ -375,7 +375,7 @@
         patchNum: ctx.params[4],
         path: ctx.params[5],
         hash: ctx.hash,
-        view: 'gr-diff-view',
+        view: Gerrit.Nav.View.DIFF,
       };
       // Don't allow diffing the same patch number against itself.
       if (params.basePatchNum === params.patchNum) {
@@ -406,7 +406,7 @@
     page(/^\/settings\/(agreements|new-agreement)/, loadUser, data => {
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
-          data.params.view = 'gr-cla-view';
+          data.params.view = Gerrit.Nav.View.AGREEMENTS;
           app.params = data.params;
         } else {
           page.redirect('/login/' + encodeURIComponent(data.canonicalPath));
@@ -418,7 +418,7 @@
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
           app.params = {
-            view: 'gr-settings-view',
+            view: Gerrit.Nav.View.SETTINGS,
             emailToken: data.params[0],
           };
         } else {
@@ -430,7 +430,7 @@
     page(/^\/settings\/?/, data => {
       restAPI.getLoggedIn().then(loggedIn => {
         if (loggedIn) {
-          app.params = {view: 'gr-settings-view'};
+          app.params = {view: Gerrit.Nav.View.SETTINGS};
         } else {
           page.show('/login/' + encodeURIComponent(data.canonicalPath));
         }
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.html b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.html
index 7939935..70772b8 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.html
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.html
@@ -18,6 +18,7 @@
 <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/iron-dropdown/iron-dropdown.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-fixed-panel/gr-fixed-panel.html">
 <link rel="import" href="../../shared/gr-rest-api-interface/gr-rest-api-interface.html">
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
index 20f455a..168ec57 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view.js
@@ -449,7 +449,7 @@
     },
 
     _paramsChanged(value) {
-      if (value.view != this.tagName.toLowerCase()) { return; }
+      if (value.view !== Gerrit.Nav.View.DIFF) { return; }
 
       this._loadHash(this.params.hash);
 
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html
index 2fc05f7..1503f93f 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html
@@ -469,7 +469,7 @@
 
       element._loggedIn = true;
       element.params = {
-        view: 'gr-diff-view',
+        view: Gerrit.Nav.View.DIFF,
         changeNum: '42',
         patchNum: '2',
         basePatchNum: '1',
@@ -493,7 +493,7 @@
       });
     });
 
-    test('hash is determined from parmas', done => {
+    test('hash is determined from params', done => {
       stub('gr-rest-api-interface', {
         getDiffComments() { return Promise.resolve({}); },
       });
@@ -502,7 +502,7 @@
 
       element._loggedIn = true;
       element.params = {
-        view: 'gr-diff-view',
+        view: Gerrit.Nav.View.DIFF,
         changeNum: '42',
         patchNum: '2',
         basePatchNum: '1',
diff --git a/polygerrit-ui/app/elements/gr-app.html b/polygerrit-ui/app/elements/gr-app.html
index 88cce5c..07ecb8d 100644
--- a/polygerrit-ui/app/elements/gr-app.html
+++ b/polygerrit-ui/app/elements/gr-app.html
@@ -31,6 +31,10 @@
   });
 </script>
 
+<link rel="import" href="../behaviors/base-url-behavior/base-url-behavior.html">
+<link rel="import" href="../behaviors/keyboard-shortcut-behavior/keyboard-shortcut-behavior.html">
+<link rel="import" href="../styles/app-theme.html">
+<link rel="import" href="../styles/shared-styles.html">
 <link rel="import" href="./admin/gr-admin-view/gr-admin-view.html">
 <link rel="import" href="./change-list/gr-change-list-view/gr-change-list-view.html">
 <link rel="import" href="./change-list/gr-dashboard-view/gr-dashboard-view.html">
@@ -38,6 +42,7 @@
 <link rel="import" href="./core/gr-error-manager/gr-error-manager.html">
 <link rel="import" href="./core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html">
 <link rel="import" href="./core/gr-main-header/gr-main-header.html">
+<link rel="import" href="./core/gr-navigation/gr-navigation.html">
 <link rel="import" href="./core/gr-reporting/gr-reporting.html">
 <link rel="import" href="./core/gr-router/gr-router.html">
 <link rel="import" href="./diff/gr-diff-view/gr-diff-view.html">
@@ -46,13 +51,6 @@
 <link rel="import" href="./settings/gr-cla-view/gr-cla-view.html">
 <link rel="import" href="./settings/gr-registration-dialog/gr-registration-dialog.html">
 <link rel="import" href="./settings/gr-settings-view/gr-settings-view.html">
-<link rel="import" href="./shared/gr-fixed-panel/gr-fixed-panel.html">
-<link rel="import" href="./shared/gr-overlay/gr-overlay.html">
-<link rel="import" href="./shared/gr-rest-api-interface/gr-rest-api-interface.html">
-<link rel="import" href="../behaviors/base-url-behavior/base-url-behavior.html">
-<link rel="import" href="../behaviors/keyboard-shortcut-behavior/keyboard-shortcut-behavior.html">
-<link rel="import" href="../styles/app-theme.html">
-<link rel="import" href="../styles/shared-styles.html">
 
 <script src="../scripts/util.js"></script>
 
diff --git a/polygerrit-ui/app/elements/gr-app.js b/polygerrit-ui/app/elements/gr-app.js
index bd29798..ba168e4 100644
--- a/polygerrit-ui/app/elements/gr-app.js
+++ b/polygerrit-ui/app/elements/gr-app.js
@@ -124,13 +124,13 @@
 
     _viewChanged(view) {
       this.$.errorView.classList.remove('show');
-      this.set('_showChangeListView', view === 'gr-change-list-view');
-      this.set('_showDashboardView', view === 'gr-dashboard-view');
-      this.set('_showChangeView', view === 'gr-change-view');
-      this.set('_showDiffView', view === 'gr-diff-view');
-      this.set('_showSettingsView', view === 'gr-settings-view');
-      this.set('_showAdminView', view === 'gr-admin-view');
-      this.set('_showCLAView', view === 'gr-cla-view');
+      this.set('_showChangeListView', view === Gerrit.Nav.View.SEARCH);
+      this.set('_showDashboardView', view === Gerrit.Nav.View.DASHBOARD);
+      this.set('_showChangeView', view === Gerrit.Nav.View.CHANGE);
+      this.set('_showDiffView', view === Gerrit.Nav.View.DIFF);
+      this.set('_showSettingsView', view === Gerrit.Nav.View.SETTINGS);
+      this.set('_showAdminView', view === Gerrit.Nav.View.ADMIN);
+      this.set('_showCLAView', view === Gerrit.Nav.View.AGREEMENTS);
       if (this.params.justRegistered) {
         this.$.registration.open();
       }
@@ -193,7 +193,7 @@
       if (!this.params) {
         return;
       }
-      const viewsToCheck = ['gr-change-list-view', 'gr-dashboard-view'];
+      const viewsToCheck = [Gerrit.Nav.View.SEARCH, Gerrit.Nav.View.DASHBOARD];
       if (viewsToCheck.includes(this.params.view)) {
         this.set('_lastSearchPage', location.pathname);
       }
@@ -218,7 +218,7 @@
 
     _handleAccountDetailUpdate(e) {
       this.$.mainHeader.reload();
-      if (this.params.view === 'gr-settings-view') {
+      if (this.params.view === Gerrit.Nav.View.SETTINGS) {
         this.$$('gr-settings-view').reloadAccountDetail();
       }
     },