Add Experiments -- helps to toggle experiment variation

src/app/app.js

@@ -10,6 +10,7 @@ import { applyFilters } from '@wordpress/hooks';
 import { AdminNotes } from '../admin-notes';
 import { default as Tools } from '../tools';
 import { default as Options } from '../options';
+import { default as Experiments } from '../experiments';
 
 const tabs = applyFilters('woocommerce_admin_test_helper_tabs', [
 	{
@@ -27,6 +28,11 @@ const tabs = applyFilters( 'woocommerce_admin_test_helper_tabs', [
 		title: 'Tools',
 		content: <Tools />,
 	},
+	{
+		name: 'experiments',
+		title: 'Experiments',
+		content: <Experiments />,
+	},
 ]);
 
 export function App() {

src/experiments/data/action-types.js

@@ -0,0 +1,6 @@
+const TYPES = {
+	TOGGLE_EXPERIMENT: 'TOGGLE_EXPERIMENT',
+	SET_EXPERIMENTS: 'SET_EXPERIMENTS',
+};
+
+export default TYPES;

src/experiments/data/actions.js

@@ -0,0 +1,34 @@
+/**
+ * Internal dependencies
+ */
+import TYPES from './action-types';
+import { EXPERIMENT_NAME_PREFIX } from './constants';
+
+export function toggleExperiment(experimentName) {
+	const storageItem = JSON.parse(
+		window.localStorage.getItem(EXPERIMENT_NAME_PREFIX + experimentName)
+	);
+
+	const newVariation =
+		storageItem.variationName === 'control' ? 'treatment' : 'control';
+
+	storageItem.variationName = newVariation;
+
+	window.localStorage.setItem(
+		EXPERIMENT_NAME_PREFIX + experimentName,
+		JSON.stringify(storageItem)
+	);
+
+	return {
+		type: TYPES.TOGGLE_EXPERIMENT,
+		experimentName,
+		newVariation,
+	};
+}
+
+export function setExperiments(experiments) {
+	return {
+		type: TYPES.SET_EXPERIMENTS,
+		experiments,
+	};
+}

src/experiments/data/constants.js

@@ -0,0 +1,2 @@
+export const STORE_KEY = 'wc-admin-helper/experiments';
+export const EXPERIMENT_NAME_PREFIX = 'explat-experiment--';

src/experiments/data/index.js

@@ -0,0 +1,22 @@
+/**
+ * External dependencies
+ */
+import { registerStore } from '@wordpress/data';
+import { controls } from '@wordpress/data-controls';
+
+/**
+ * Internal dependencies
+ */
+import * as actions from './actions';
+import * as resolvers from './resolvers';
+import * as selectors from './selectors';
+import reducer from './reducer';
+import { STORE_KEY } from './constants';
+
+export default registerStore(STORE_KEY, {
+	actions,
+	selectors,
+	resolvers,
+	controls,
+	reducer,
+});

src/experiments/data/reducer.js

@@ -0,0 +1,34 @@
+/**
+ * Internal dependencies
+ */
+import TYPES from './action-types';
+
+const DEFAULT_STATE = {
+	experiments: [],
+};
+
+const reducer = (state = DEFAULT_STATE, action) => {
+	switch (action.type) {
+		case TYPES.TOGGLE_EXPERIMENT:
+			let experiments = [...state.experiments];
+			experiments = experiments.map((experiment) => {
+				if (experiment.name === action.experimentName) {
+					experiment.variation = action.newVariation;
+				}
+				return experiment;
+			});
+			return {
+				...state,
+				experiments,
+			};
+		case TYPES.SET_EXPERIMENTS:
+			return {
+				...state,
+				experiments: action.experiments,
+			};
+		default:
+			return state;
+	}
+};
+
+export default reducer;

src/experiments/data/resolvers.js

@@ -0,0 +1,32 @@
+/**
+ * Internal dependencies
+ */
+import { setExperiments } from './actions';
+import { EXPERIMENT_NAME_PREFIX } from './constants';
+
+export function* getExperiments() {
+	const storageItems = Object.entries({ ...window.localStorage }).filter(
+		(item) => {
+			if (item[0].indexOf(EXPERIMENT_NAME_PREFIX) === 0) {
+				return true;
+			}
+			return false;
+		}
+	);
+
+	const experiments = [];
+	storageItems.forEach((storageItem) => {
+		const [key, value] = storageItem;
+		const objectValue = JSON.parse(value);
+
+		const experiment = {
+			name: key.replace(EXPERIMENT_NAME_PREFIX, ''),
+			variation: objectValue.variationName
+				? objectValue.variationName
+				: 'control',
+		};
+		experiments.push(experiment);
+	});
+
+	yield setExperiments(experiments);
+}

src/experiments/data/selectors.js

@@ -0,0 +1,3 @@
+export function getExperiments(state) {
+	return state.experiments;
+}

src/experiments/index.js

@@ -0,0 +1,65 @@
+/**
+ * External dependencies
+ */
+import { withDispatch, withSelect } from '@wordpress/data';
+import { compose } from '@wordpress/compose';
+import { Button } from '@wordpress/components';
+
+/**
+ * Internal dependencies
+ */
+import { STORE_KEY } from './data/constants';
+import './data';
+
+function Experiments({ experiments, toggleExperiment }) {
+	return (
+		<div id="wc-admin-test-helper-experiments">
+			<h2>Experiments</h2>
+			<table className="experiments wp-list-table striped table-view-list widefat">
+				<thead>
+					<tr>
+						<th>Experiment</th>
+						<th>Variation</th>
+						<th>Toggle</th>
+					</tr>
+				</thead>
+				<tbody>
+					{experiments.map(({ name, variation }, index) => {
+						return (
+							<tr key={index}>
+								<td className="experiment-name">{name}</td>
+								<td align="center">{variation}</td>
+								<td align="center">
+									<Button
+										onClick={() => {
+											toggleExperiment(name);
+										}}
+										isPrimary
+									>
+										Toggle
+									</Button>
+								</td>
+							</tr>
+						);
+					})}
+				</tbody>
+			</table>
+		</div>
+	);
+}
+
+export default compose(
+	withSelect((select) => {
+		const { getExperiments } = select(STORE_KEY);
+		return {
+			experiments: getExperiments(),
+		};
+	}),
+	withDispatch((dispatch) => {
+		const { toggleExperiment } = dispatch(STORE_KEY);
+
+		return {
+			toggleExperiment,
+		};
+	})
+)(Experiments);

src/index.scss

@@ -51,8 +51,8 @@
     float: right;
 }
 
-#wc-admin-test-helper-tools {
-    table.tools {
+#wc-admin-test-helper-tools, #wc-admin-test-helper-experiments {
+    table.tools, table.experiments {
         thead th {
             text-align: center;
         }