Support filtering groups through `changeFocusModeUser` RPC method

src/sidebar/cross-origin-rpc.js

@@ -25,7 +25,17 @@ let preStartQueue = [];
  */
 const registeredMethods = store => {
   return {
-    changeFocusModeUser: store.changeFocusModeUser,
+    /** @param {FocusUserInfo} userInfo */
+    changeFocusModeUser: userInfo => {
+      store.changeFocusModeUser(userInfo);
+
+      const groupIds = userInfo?.groups ?? [];
+      const filteredGroupIds = normalizeGroupIds(groupIds, store.allGroups());
+      if (groupIds.length && !filteredGroupIds.length) {
+        console.error('No matching groups found in list of filtered group IDs');
+      }
+      store.filterGroups(filteredGroupIds);
+    },
   };
 };
 

src/sidebar/test/cross-origin-rpc-test.js

@@ -11,6 +11,7 @@ class FakeWindow {
 }
 
 describe('sidebar/cross-origin-rpc', () => {
+  let fakeNormalizeGroupIds;
   let fakeStore;
   let fakeWarnOnce;
   let fakeWindow;
@@ -19,9 +20,13 @@ describe('sidebar/cross-origin-rpc', () => {
 
   beforeEach(() => {
     fakeStore = {
+      allGroups: sinon.stub().returns([]),
       changeFocusModeUser: sinon.stub(),
+      filterGroups: sinon.stub(),
     };
 
+    fakeNormalizeGroupIds = sinon.stub().returns(['1', '2']);
+
     frame = { postMessage: sinon.stub() };
     fakeWindow = new FakeWindow();
 
@@ -32,6 +37,7 @@ describe('sidebar/cross-origin-rpc', () => {
     fakeWarnOnce = sinon.stub();
 
     $imports.$mock({
+      './helpers/groups': { normalizeGroupIds: fakeNormalizeGroupIds },
       '../shared/warn-once': fakeWarnOnce,
     });
   });
@@ -64,6 +70,83 @@ describe('sidebar/cross-origin-rpc', () => {
       );
     });
 
+    describe('changeFocusModeUser', () => {
+      function callRPC(params) {
+        fakeWindow.emitter.emit('message', {
+          data: {
+            jsonrpc: '2.0',
+            method: 'changeFocusModeUser',
+            id: 42,
+            params,
+          },
+          origin: 'https://allowed1.com',
+          source: frame,
+        });
+      }
+
+      beforeEach(() => {
+        sinon.stub(console, 'error');
+      });
+
+      afterEach(() => {
+        console.error.restore();
+      });
+
+      it('sets the focused user', () => {
+        startServer(fakeStore, settings, fakeWindow);
+
+        callRPC([{ username: 'foobar', displayName: 'Simon Says' }]);
+
+        assert.calledWith(
+          fakeStore.changeFocusModeUser,
+          sinon.match({ username: 'foobar', displayName: 'Simon Says' })
+        );
+      });
+
+      context('groups provided', () => {
+        it('normalizes any provided group IDs and sets filtered groups', () => {
+          startServer(fakeStore, settings, fakeWindow);
+          fakeStore.allGroups.returns(['1', '2', '3']);
+          fakeNormalizeGroupIds.returns(['1', '2']);
+
+          callRPC([{ groups: ['1', '2', '3', '4'] }]);
+
+          assert.calledWith(
+            fakeNormalizeGroupIds,
+            ['1', '2', '3', '4'],
+            ['1', '2', '3']
+          );
+          assert.calledWith(fakeStore.filterGroups, ['1', '2']);
+          assert.notCalled(console.error);
+        });
+
+        it('logs an error if there are provided group IDs but none match any known groups', () => {
+          startServer(fakeStore, settings, fakeWindow);
+          fakeNormalizeGroupIds.returns([]);
+
+          callRPC([{ groups: ['1', '2', '3'] }]);
+
+          assert.calledWith(
+            console.error,
+            'No matching groups found in list of filtered group IDs'
+          );
+          assert.calledWith(fakeStore.filterGroups, []);
+        });
+      });
+
+      context('no groups provided', () => {
+        it('sets filtered groups to an empty set', () => {
+          startServer(fakeStore, settings, fakeWindow);
+          fakeNormalizeGroupIds.returns([]);
+
+          callRPC([{ groups: [] }]);
+
+          assert.calledWith(fakeStore.filterGroups, []);
+          assert.notCalled(console.error);
+        });
+      });
+    });
+
     it('calls the registered method with the provided params', () => {
       startServer(fakeStore, settings, fakeWindow);
 
@@ -78,9 +161,7 @@ describe('sidebar/cross-origin-rpc', () => {
         source: frame,
       });
 
-      assert.isTrue(
-        fakeStore.changeFocusModeUser.calledWithExactly('one', 'two')
-      );
+      assert.isTrue(fakeStore.changeFocusModeUser.calledWithExactly('one'));
     });
 
     it('calls the registered method with no params', () => {
@@ -95,7 +176,7 @@ describe('sidebar/cross-origin-rpc', () => {
         origin: 'https://allowed1.com',
         source: frame,
       });
-      assert.isTrue(fakeStore.changeFocusModeUser.calledWithExactly());
+      assert.isTrue(fakeStore.changeFocusModeUser.calledWithExactly(undefined));
     });
 
     it('does not call the unregistered method', () => {