[Maps] Update EMS Landing Page link to root or vX.Y (#162494)

Fixes #161791

Updates the link to the EMS Landing Page website in the Kibana Maps UI
to point to the root directory at https://maps.elastic.co when the build
is `serverless` and to the correct `https://maps.elastic.co/vX.Y` for
`traditional` builds.

To test:

* When running with `yarn start`
* Check the link in the source details of an EMS Administrative
boundaries dataset in the Maps Application
* When running with `yarn start --serverless=es`
* Check the source details of an EMS Administrative boundaries dataset
in the Maps Application

:warning: **Note**: This change does not affect the link in the Tutorial
for the Elastic Maps Service since it only touches the EMS Client
creation and not the `EMSSettings` that happens synchronously. This is
OK since that tutorial should point to the latest Landing Page revision
to offer all the data for our users.

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>

src/plugins/maps_ems/common/ems_defaults.ts

@@ -8,7 +8,7 @@
 
 export const DEFAULT_EMS_FILE_API_URL = 'https://vector.maps.elastic.co';
 export const DEFAULT_EMS_TILE_API_URL = 'https://tiles.maps.elastic.co';
-export const DEFAULT_EMS_LANDING_PAGE_URL = 'https://maps.elastic.co/v8.7';
+export const DEFAULT_EMS_LANDING_PAGE_URL = 'https://maps.elastic.co';
 export const DEFAULT_EMS_FONT_LIBRARY_URL =
   'https://tiles.maps.elastic.co/fonts/{fontstack}/{range}.pbf';
 

src/plugins/maps_ems/public/lazy_load_bundle/create_ems_client.ts

@@ -6,18 +6,32 @@
  * Side Public License, v 1.
  */
 
+import coerce from 'semver/functions/coerce';
+
+import { BuildFlavor } from '@kbn/config/src/types';
 import { i18n } from '@kbn/i18n';
 import { EMSClient } from '@elastic/ems-client';
 import { EMS_APP_NAME, EMSSettings } from '../../common';
 
-export function createEMSClient(emsSettings: EMSSettings, kbnVersion: string): EMSClient {
+export function createEMSClient(
+  emsSettings: EMSSettings,
+  kbnVersion: string,
+  buildFlavor: BuildFlavor = 'traditional'
+): EMSClient {
+  let landingPageUrl = emsSettings!.getEMSLandingPageUrl();
+  const kbnSemVer = coerce(kbnVersion);
+
+  if (buildFlavor === 'traditional' && kbnSemVer) {
+    landingPageUrl = `${landingPageUrl}/v${kbnSemVer.major}.${kbnSemVer.minor}`;
+  }
+
   return new EMSClient({
     language: i18n.getLocale(),
     appVersion: kbnVersion,
     appName: EMS_APP_NAME,
     tileApiUrl: emsSettings!.getEMSTileApiUrl(),
     fileApiUrl: emsSettings!.getEMSFileApiUrl(),
-    landingPageUrl: emsSettings!.getEMSLandingPageUrl(),
+    landingPageUrl,
     fetchFunction(url: string) {
       return fetch(url);
     },

src/plugins/maps_ems/public/lazy_load_bundle/index.ts

@@ -7,13 +7,18 @@
  */
 
 import type { EMSClient } from '@elastic/ems-client';
+import { BuildFlavor } from '@kbn/config/src/types';
 import type { EMSSettings } from '../../common';
 
-let lazyLoaded: (emsSettings: EMSSettings, version: string) => EMSClient;
+let lazyLoaded: (emsSettings: EMSSettings, version: string, buildFlavor: BuildFlavor) => EMSClient;
 
-export async function createEMSClientLazy(emsSettings: EMSSettings, version: string) {
+export async function createEMSClientLazy(
+  emsSettings: EMSSettings,
+  version: string,
+  buildFlavor: BuildFlavor = 'traditional'
+) {
   if (lazyLoaded) {
-    return await lazyLoaded(emsSettings, version);
+    return await lazyLoaded(emsSettings, version, buildFlavor);
   }
 
   lazyLoaded = await new Promise(async (resolve, reject) => {
@@ -29,5 +34,5 @@ export async function createEMSClientLazy(emsSettings: EMSSettings, version: str
     }
   });
 
-  return await lazyLoaded(emsSettings, version);
+  return await lazyLoaded(emsSettings, version, buildFlavor);
 }

src/plugins/maps_ems/public/plugin.ts

@@ -35,10 +35,11 @@ export class MapsEmsPlugin implements Plugin<MapsEmsPluginPublicSetup, MapsEmsPl
   }
 
   public start(code: CoreStart, plugins: MapsEmsStartPublicDependencies) {
-    const mapConfig = this._initializerContext.config.get<MapConfig>();
-    const kibanaVersion = this._initializerContext.env.packageInfo.version;
+    const context = this._initializerContext;
+    const mapConfig = context.config.get<MapConfig>();
+    const { buildFlavor, version } = context.env.packageInfo;
 
-    setKibanaVersion(kibanaVersion);
+    setKibanaVersion(version);
     setMapConfig(mapConfig);
 
     if (plugins.licensing) {
@@ -51,7 +52,7 @@ export class MapsEmsPlugin implements Plugin<MapsEmsPluginPublicSetup, MapsEmsPl
       },
       createEMSClient: async () => {
         const emsSettings = createEMSSettings(mapConfig, getIsEnterprisePlus);
-        return createEMSClientLazy(emsSettings, kibanaVersion);
+        return createEMSClientLazy(emsSettings, version, buildFlavor);
       },
     };
   }

src/plugins/maps_ems/tsconfig.json

@@ -9,6 +9,7 @@
     "@kbn/licensing-plugin",
     "@kbn/i18n",
     "@kbn/config-schema",
+    "@kbn/config",
   ],
   "exclude": [
     "target/**/*",