Add simple live share warning (#8066)

* add simple live share warning

Signed-off-by: Kerry Archibald <kerrya@element.io>

* rough first cut of OwnBeaconStore

Signed-off-by: Kerry Archibald <kerrya@element.io>

* working (?) has live beacons status

Signed-off-by: Kerry Archibald <kerrya@element.io>

* lint

Signed-off-by: Kerry Archibald <kerrya@element.io>

* add left panel share warning

Signed-off-by: Kerry Archibald <kerrya@element.io>

* setup for tests

Signed-off-by: Kerry Archibald <kerrya@element.io>

* test ownbeaconstore

Signed-off-by: Kerry Archibald <kerrya@element.io>

* add copyright

Signed-off-by: Kerry Archibald <kerrya@element.io>

* add copyright

Signed-off-by: Kerry Archibald <kerrya@element.io>

* remove warning banner

Signed-off-by: Kerry Archibald <kerrya@element.io>

* fix test

Signed-off-by: Kerry Archibald <kerrya@element.io>

* fix tests for weird asyncstore closure issues

Signed-off-by: Kerry Archibald <kerrya@element.io>

* fix OwnBeaconStore more...

Signed-off-by: Kerry Archibald <kerrya@element.io>

* revert loose change to LeftPanel

Signed-off-by: Kerry Archibald <kerrya@element.io>

* Revert "remove warning banner"

This reverts commit 4529813b12e3206731f18e0514aa6e0f6896d03a.

* test live share warning

Signed-off-by: Kerry Archibald <kerrya@element.io>

test/components/views/beacon/LeftPanelLiveShareWarning-test.tsx

@@ -0,0 +1,80 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+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.
+*/
+
+import React from 'react';
+import { mocked } from 'jest-mock';
+import { mount } from 'enzyme';
+
+import '../../../skinned-sdk';
+import LeftPanelLiveShareWarning from '../../../../src/components/views/beacon/LeftPanelLiveShareWarning';
+import { OwnBeaconStore, OwnBeaconStoreEvent } from '../../../../src/stores/OwnBeaconStore';
+import { flushPromises } from '../../../test-utils';
+
+jest.mock('../../../../src/stores/OwnBeaconStore', () => {
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
+    const EventEmitter = require("events");
+    class MockOwnBeaconStore extends EventEmitter {
+        public hasLiveBeacons = jest.fn().mockReturnValue(false);
+    }
+    return {
+        // @ts-ignore
+        ...jest.requireActual('../../../../src/stores/OwnBeaconStore'),
+        OwnBeaconStore: {
+            instance: new MockOwnBeaconStore() as unknown as OwnBeaconStore,
+        },
+    };
+},
+);
+
+describe('<LeftPanelLiveShareWarning />', () => {
+    const defaultProps = {};
+    const getComponent = (props = {}) =>
+        mount(<LeftPanelLiveShareWarning {...defaultProps} {...props} />);
+
+    it('renders nothing when user has no live beacons', () => {
+        const component = getComponent();
+        expect(component.html()).toBe(null);
+    });
+
+    describe('when user has live beacons', () => {
+        beforeEach(() => {
+            mocked(OwnBeaconStore.instance).hasLiveBeacons.mockReturnValue(true);
+        });
+        it('renders correctly when not minimized', () => {
+            const component = getComponent();
+            expect(component).toMatchSnapshot();
+        });
+
+        it('renders correctly when minimized', () => {
+            const component = getComponent({ isMinimized: true });
+            expect(component).toMatchSnapshot();
+        });
+
+        it('removes itself when user stops having live beacons', async () => {
+            const component = getComponent({ isMinimized: true });
+            // started out rendered
+            expect(component.html()).toBeTruthy();
+
+            mocked(OwnBeaconStore.instance).hasLiveBeacons.mockReturnValue(false);
+            OwnBeaconStore.instance.emit(OwnBeaconStoreEvent.LivenessChange, false);
+
+            await flushPromises();
+            component.setProps({});
+
+            expect(component.html()).toBe(null);
+        });
+    });
+});

test/components/views/beacon/__snapshots__/LeftPanelLiveShareWarning-test.tsx.snap

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+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`<LeftPanelLiveShareWarning /> when user has live beacons renders correctly when minimized 1`] = `
+<LeftPanelLiveShareWarning
+  isMinimized={true}
+>
+  <div
+    className="mx_LeftPanelLiveShareWarning mx_LeftPanelLiveShareWarning__minimized"
+    title="You are sharing your live location"
+  >
+    <div
+      height={10}
+    />
+  </div>
+</LeftPanelLiveShareWarning>
+`;
+
+exports[`<LeftPanelLiveShareWarning /> when user has live beacons renders correctly when not minimized 1`] = `
+<LeftPanelLiveShareWarning>
+  <div
+    className="mx_LeftPanelLiveShareWarning"
+  >
+    You are sharing your live location
+  </div>
+</LeftPanelLiveShareWarning>
+`;