Add link to old UI to edit project access

If a user is an admin, show them the GWT link. If not an admin, don't
display.

Bug: Issue 7309
Change-Id: I63ce2e0ab22c68ebc6dbf0744fab06e9299329f3

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

@@ -127,7 +127,9 @@ limitations under the License.
     </template>
     <template is="dom-if" if="[[_showProjectAccess]]" restamp="true">
       <main class="table">
-        <gr-project-access project="[[params.project]]"></gr-project-access>
+        <gr-project-access
+            path="[[path]]"
+            project="[[params.project]]"></gr-project-access>
       </main>
     </template>
     <template is="dom-if" if="[[params.placeholder]]" restamp="true">

polygerrit-ui/app/elements/admin/gr-project-access/gr-project-access.html

@@ -29,9 +29,22 @@ limitations under the License.
 
 <dom-module id="gr-project-access">
   <template>
-  <style include="shared-styles"></style>
+    <style include="shared-styles">
+      .gwtLink {
+        margin-bottom: 1em;
+      }
+      .gwtLink {
+        display: none;
+      }
+      .admin .gwtLink {
+        display: block;
+      }
+    </style>
     <style include="gr-menu-page-styles"></style>
-    <main>
+    <main class$="[[_computeAdminClass(_isAdmin)]]">
+      <div class="gwtLink">This is currently in read only mode.  To modify content, go to the
+        <a href$="[[computeGwtUrl(path)]]" rel="external">Old UI</a>
+      </div>
       <template is="dom-if" if="[[_inheritsFrom]]">
         <h3 id="inheritsFrom">Rights Inherit From
           <a href$="[[_computeParentHref(_inheritsFrom.name)]]" rel="noopener">

polygerrit-ui/app/elements/admin/gr-project-access/gr-project-access.js

@@ -22,7 +22,13 @@
         type: String,
         observer: '_projectChanged',
       },
+      // The current path
+      path: String,
 
+      _isAdmin: {
+        type: Boolean,
+        value: false,
+      },
       _capabilities: Object,
       _groups: Object,
       /** @type {?} */
@@ -67,6 +73,10 @@
         return res.labels;
       }));
 
+      promises.push(this.$.restAPI.getIsAdmin().then(isAdmin => {
+        this._isAdmin = isAdmin;
+      }));
+
       return Promise.all(promises).then(value => {
         this._capabilities = value[1];
         this._labels = value[2];
@@ -79,6 +89,10 @@
       });
     },
 
+    _computeAdminClass(isAdmin) {
+      return isAdmin ? 'admin' : '';
+    },
+
     _computeParentHref(projectName) {
       return this.getBaseUrl() +
           `/admin/projects/${this.encodeURL(projectName, true)},access`;

polygerrit-ui/app/elements/admin/gr-project-access/gr-project-access_test.html

@@ -83,11 +83,14 @@ limitations under the License.
           'getCapabilities').returns(Promise.resolve(capabilitiesRes));
       const projectStub = sandbox.stub(element.$.restAPI, 'getProject').returns(
           Promise.resolve(projectRes));
+      const adminStub = sandbox.stub(element.$.restAPI, 'getIsAdmin').returns(
+          Promise.resolve(true));
 
       element._projectChanged('New Project').then(() => {
         assert.isTrue(accessStub.called);
         assert.isTrue(capabilitiesStub.called);
         assert.isTrue(projectStub.called);
+        assert.isTrue(adminStub.called);
         assert.isNotOk(element._inheritsFrom);
         assert.deepEqual(element._local, accessRes.local);
         assert.deepEqual(element._sections,
@@ -143,6 +146,13 @@ limitations under the License.
           '/admin/projects/test-project,access');
     });
 
+    test('_computeAdminClass', () => {
+      let isAdmin = true;
+      assert.equal(element._computeAdminClass(isAdmin), 'admin');
+      isAdmin = false;
+      assert.equal(element._computeAdminClass(isAdmin), '');
+    });
+
     test('inherit section', () => {
       sandbox.stub(element, '_computeParentHref');
       assert.isNotOk(Polymer.dom(element.root).querySelector('#inheritsFrom'));