[State Management] State syncing utilities (elastic#53582)

Today, apps rely on AppState and GlobalState in the ui/state_management module to deal with internal (app) and shared (global) state. These classes give apps an ability to read/write state, when is then synced to the URL as well as sessionStorage. They also react to changes in the URL and automatically update state & emit events when changes occur.

This PR introduces new state synching utilities, which together with state containers src/plugins/kibana_utils/public/state_containers will be a replacement for AppState and GlobalState in New Platform.

examples/state_containers_examples/kibana.json

@@ -0,0 +1,10 @@
+{
+  "id": "stateContainersExamples",
+  "version": "0.0.1",
+  "kibanaVersion": "kibana",
+  "configPath": ["state_containers_examples"],
+  "server": false,
+  "ui": true,
+  "requiredPlugins": [],
+  "optionalPlugins": []
+}

examples/state_containers_examples/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "state_containers_examples",
+  "version": "1.0.0",
+  "main": "target/examples/state_containers_examples",
+  "kibana": {
+    "version": "kibana",
+    "templateVersion": "1.0.0"
+  },
+  "license": "Apache-2.0",
+  "scripts": {
+    "kbn": "node ../../scripts/kbn.js",
+    "build": "rm -rf './target' && tsc"
+  },
+  "devDependencies": {
+    "typescript": "3.7.2"
+  }
+}

examples/state_containers_examples/public/app.tsx

@@ -0,0 +1,69 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you 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 { AppMountParameters } from 'kibana/public';
+import ReactDOM from 'react-dom';
+import React from 'react';
+import { createHashHistory, createBrowserHistory } from 'history';
+import { TodoAppPage } from './todo';
+
+export interface AppOptions {
+  appInstanceId: string;
+  appTitle: string;
+  historyType: History;
+}
+
+export enum History {
+  Browser,
+  Hash,
+}
+
+export const renderApp = (
+  { appBasePath, element }: AppMountParameters,
+  { appInstanceId, appTitle, historyType }: AppOptions
+) => {
+  const history =
+    historyType === History.Browser
+      ? createBrowserHistory({ basename: appBasePath })
+      : createHashHistory();
+  ReactDOM.render(
+    <TodoAppPage
+      history={history}
+      appInstanceId={appInstanceId}
+      appTitle={appTitle}
+      appBasePath={appBasePath}
+      isInitialRoute={() => {
+        const stripTrailingSlash = (path: string) =>
+          path.charAt(path.length - 1) === '/' ? path.substr(0, path.length - 1) : path;
+        const currentAppUrl = stripTrailingSlash(history.createHref(history.location));
+        if (historyType === History.Browser) {
+          // browser history
+          const basePath = stripTrailingSlash(appBasePath);
+          return currentAppUrl === basePath && !history.location.search && !history.location.hash;
+        } else {
+          // hashed history
+          return currentAppUrl === '#' && !history.location.search;
+        }
+      }}
+    />,
+    element
+  );
+
+  return () => ReactDOM.unmountComponentAtNode(element);
+};

test/typings/encode_uri_query.d.ts → examples/state_containers_examples/public/index.ts

@@ -17,8 +17,6 @@
  * under the License.
  */
 
-declare module 'encode-uri-query' {
-  function encodeUriQuery(query: string, usePercentageSpace?: boolean): string;
-  // eslint-disable-next-line import/no-default-export
-  export default encodeUriQuery;
-}
+import { StateContainersExamplesPlugin } from './plugin';
+
+export const plugin = () => new StateContainersExamplesPlugin();

examples/state_containers_examples/public/plugin.ts

@@ -0,0 +1,52 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you 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 { AppMountParameters, CoreSetup, Plugin } from 'kibana/public';
+
+export class StateContainersExamplesPlugin implements Plugin {
+  public setup(core: CoreSetup) {
+    core.application.register({
+      id: 'state-containers-example-browser-history',
+      title: 'State containers example - browser history routing',
+      async mount(params: AppMountParameters) {
+        const { renderApp, History } = await import('./app');
+        return renderApp(params, {
+          appInstanceId: '1',
+          appTitle: 'Routing with browser history',
+          historyType: History.Browser,
+        });
+      },
+    });
+    core.application.register({
+      id: 'state-containers-example-hash-history',
+      title: 'State containers example - hash history routing',
+      async mount(params: AppMountParameters) {
+        const { renderApp, History } = await import('./app');
+        return renderApp(params, {
+          appInstanceId: '2',
+          appTitle: 'Routing with hash history',
+          historyType: History.Hash,
+        });
+      },
+    });
+  }
+
+  public start() {}
+  public stop() {}
+}