Add some types for interpter plugin registration (elastic#31600)

* Some basic types for top level legacy plugin registration

* put typescript interface closer to implementation

* Use default export, you have to

* fix build and address code review comments

kibana.d.ts

@@ -25,6 +25,7 @@ export * from './target/types/type_exports';
  * All exports from TS ambient definitions (where types are added for JS source in a .d.ts file).
  */
 import * as LegacyElasticsearch from './src/legacy/core_plugins/elasticsearch';
+import * as LegacyKibanaPluginSpec from './src/legacy/plugin_discovery/plugin_spec/plugin_spec_options';
 import * as LegacyKibanaServer from './src/legacy/server/kbn_server';
 
 /**
@@ -40,6 +41,10 @@ export namespace Legacy {
   export type SavedObjectsService = LegacyKibanaServer.SavedObjectsService;
   export type Server = LegacyKibanaServer.Server;
 
+  export type InitPluginFunction = LegacyKibanaPluginSpec.InitPluginFunction;
+  export type UiExports = LegacyKibanaPluginSpec.UiExports;
+  export type PluginSpecOptions = LegacyKibanaPluginSpec.PluginSpecOptions;
+
   export namespace Plugins {
     export namespace elasticsearch {
       export type Plugin = LegacyElasticsearch.ElasticsearchPlugin;

src/legacy/core_plugins/interpreter/index.js → src/legacy/core_plugins/interpreter/index.ts

@@ -18,17 +18,20 @@
  */
 
 import { resolve } from 'path';
-import init from './init';
+import { Legacy } from '../../../../kibana';
+import { init } from './init';
 
-export default function (kibana) {
-  return new kibana.Plugin({
+// tslint:disable-next-line
+export default function InterpreterPlugin(kibana: any) {
+  const config: Legacy.PluginSpecOptions = {
     id: 'interpreter',
     require: ['kibana', 'elasticsearch'],
     publicDir: resolve(__dirname, 'public'),
     uiExports: {
       injectDefaultVars: server => ({ serverBasePath: server.config().get('server.basePath') }),
     },
     init,
-  });
-}
+  };
 
+  return new kibana.Plugin(config);
+}

src/legacy/core_plugins/interpreter/init.js → src/legacy/core_plugins/interpreter/init.ts

@@ -17,17 +17,26 @@
  * under the License.
  */
 
-import { routes } from './server/routes';
+// @ts-ignore
 import { registryFactory } from '@kbn/interpreter/common';
+
+// @ts-ignore
 import { registries } from '@kbn/interpreter/server';
 
-export default async function (server /*options*/) {
+// @ts-ignore
+import { routes } from './server/routes';
+
+import { Legacy } from '../../../../kibana';
+
+export async function init(server: Legacy.Server /*options*/) {
   server.injectUiAppVars('canvas', () => {
     const config = server.config();
     const basePath = config.get('server.basePath');
     const reportingBrowserType = (() => {
       const configKey = 'xpack.reporting.capture.browser.type';
-      if (!config.has(configKey)) return null;
+      if (!config.has(configKey)) {
+        return null;
+      }
       return config.get(configKey);
     })();
 

src/legacy/plugin_discovery/plugin_spec/plugin_spec_options.d.ts

@@ -0,0 +1,32 @@
+/*
+ * 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 { Server } from '../../server/kbn_server';
+
+export type InitPluginFunction = (server: Server) => void;
+export interface UiExports {
+  injectDefaultVars: (server: Server) => { [key: string]: any };
+}
+
+export interface PluginSpecOptions {
+  id: string;
+  require: string[];
+  publicDir: string;
+  uiExports?: UiExports;
+  init: InitPluginFunction;
+}

src/legacy/server/kbn_server.d.ts

@@ -27,6 +27,7 @@ import { SavedObjectsClient, SavedObjectsService } from './saved_objects';
 
 export interface KibanaConfig {
   get<T>(key: string): T;
+  has(key: string): boolean;
 }
 
 // Extend the defaults with the plugins and server methods we need.
@@ -43,6 +44,7 @@ declare module 'hapi' {
     config: () => KibanaConfig;
     indexPatternsServiceFactory: IndexPatternsServiceFactory;
     savedObjects: SavedObjectsService;
+    injectUiAppVars: (pluginName: string, getAppVars: () => { [key: string]: any }) => void;
   }
 
   interface Request {

src/legacy/server/saved_objects/routes/_mock_server.ts

@@ -38,6 +38,9 @@ export function createMockServer(config: { [key: string]: any } = defaultConfig)
       get(key: string) {
         return config[key];
       },
+      has(key: string) {
+        return config.hasOwnProperty(key);
+      },
     };
   };
 

x-pack/plugins/apm/server/lib/errors/distribution/__tests__/get_buckets.test.ts

@@ -30,7 +30,8 @@ describe('timeseriesFetcher', () => {
         end: 1528977600000,
         client: clientSpy,
         config: {
-          get: () => 'myIndex' as any
+          get: () => 'myIndex' as any,
+          has: () => true
         }
       }
     });

x-pack/plugins/apm/server/lib/transaction_groups/fetcher.test.ts

@@ -24,7 +24,8 @@ describe('transactionGroupsFetcher', () => {
             case 'xpack.apm.ui.transactionGroupBucketSize':
               return 100;
           }
-        })
+        }),
+        has: () => true
       }
     };
     const bodyQuery = { my: 'bodyQuery' };

x-pack/plugins/apm/server/lib/transactions/charts/get_anomaly_data/index.test.ts

@@ -26,7 +26,8 @@ describe('getAnomalySeries', () => {
         end: 500000,
         client: clientSpy,
         config: {
-          get: () => 'myIndex' as any
+          get: () => 'myIndex' as any,
+          has: () => true
         }
       }
     })) as AnomalyTimeSeriesResponse;

x-pack/plugins/apm/server/lib/transactions/charts/get_timeseries_data/fetcher.test.ts

@@ -22,7 +22,8 @@ describe('timeseriesFetcher', () => {
         end: 1528977600000,
         client: clientSpy,
         config: {
-          get: () => 'myIndex' as any
+          get: () => 'myIndex' as any,
+          has: () => true
         }
       }
     });

x-pack/plugins/apm/server/testHelpers/mocks.ts

@@ -10,6 +10,7 @@ interface TestSetup extends Setup {
   client: jest.Mock;
   config: {
     get: jest.Mock;
+    has: () => boolean;
   };
 }
 
@@ -22,7 +23,8 @@ export function getSetupMock(overrides: Partial<TestSetup> = {}) {
       term: { field: 'test.esfilter.query' }
     },
     config: {
-      get: jest.fn()
+      get: jest.fn(),
+      has: () => true
     },
     ...overrides
   };