[SIEM][Lists] Fixes up contracts to work outside of requests

## Summary

Fixes up the API contracts to work outside of a request and as a regular plugin.

* Removes space and request stuff that is not needed
* Adds in plugin ability with space id and user name being pushed down

x-pack/plugins/lists/server/plugin.ts

@@ -5,7 +5,7 @@
  */
 
 import { first } from 'rxjs/operators';
-import { Logger, PluginInitializerContext } from 'kibana/server';
+import { Logger, Plugin, PluginInitializerContext } from 'kibana/server';
 import { CoreSetup } from 'src/core/server';
 
 import { SecurityPluginSetup } from '../../security/server';
@@ -14,12 +14,19 @@ import { SpacesServiceSetup } from '../../spaces/server';
 import { ConfigType } from './config';
 import { initRoutes } from './routes/init_routes';
 import { ListClient } from './services/lists/client';
-import { ContextProvider, ContextProviderReturn, PluginsSetup } from './types';
+import {
+  ContextProvider,
+  ContextProviderReturn,
+  ListPluginSetup,
+  ListsPluginStart,
+  PluginsSetup,
+} from './types';
 import { createConfig$ } from './create_config';
 import { getSpaceId } from './get_space_id';
 import { getUser } from './get_user';
 
-export class ListPlugin {
+export class ListPlugin
+  implements Plugin<Promise<ListPluginSetup>, ListsPluginStart, PluginsSetup> {
   private readonly logger: Logger;
   private spaces: SpacesServiceSetup | undefined | null;
   private config: ConfigType | undefined | null;
@@ -29,7 +36,7 @@ export class ListPlugin {
     this.logger = this.initializerContext.logger.get();
   }
 
-  public async setup(core: CoreSetup, plugins: PluginsSetup): Promise<void> {
+  public async setup(core: CoreSetup, plugins: PluginsSetup): Promise<ListPluginSetup> {
     const config = await createConfig$(this.initializerContext)
       .pipe(first())
       .toPromise();
@@ -44,6 +51,17 @@ export class ListPlugin {
     core.http.registerRouteHandlerContext('lists', this.createRouteHandlerContext());
     const router = core.http.createRouter();
     initRoutes(router);
+
+    return {
+      getListClient: (apiCaller, spaceId, user): ListClient => {
+        return new ListClient({
+          callCluster: apiCaller,
+          config,
+          spaceId,
+          user,
+        });
+      },
+    };
   }
 
   public start(): void {
@@ -74,8 +92,6 @@ export class ListPlugin {
             new ListClient({
               callCluster: callAsCurrentUser,
               config,
-              request,
-              security,
               spaceId,
               user,
             }),

x-pack/plugins/lists/server/services/lists/client_types.ts

@@ -6,9 +6,8 @@
 
 import { PassThrough, Readable } from 'stream';
 
-import { APICaller, KibanaRequest } from 'kibana/server';
+import { APICaller } from 'kibana/server';
 
-import { SecurityPluginSetup } from '../../../../security/server';
 import {
   Description,
   DescriptionOrUndefined,
@@ -24,10 +23,8 @@ import { ConfigType } from '../../config';
 export interface ConstructorOptions {
   callCluster: APICaller;
   config: ConfigType;
-  request: KibanaRequest;
   spaceId: string;
   user: string;
-  security: SecurityPluginSetup | undefined | null;
 }
 
 export interface GetListOptions {

x-pack/plugins/lists/server/types.ts

@@ -4,7 +4,7 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { IContextProvider, RequestHandler } from 'kibana/server';
+import { APICaller, IContextProvider, RequestHandler } from 'kibana/server';
 
 import { SecurityPluginSetup } from '../../security/server';
 import { SpacesPluginSetup } from '../../spaces/server';
@@ -12,12 +12,21 @@ import { SpacesPluginSetup } from '../../spaces/server';
 import { ListClient } from './services/lists/client';
 
 export type ContextProvider = IContextProvider<RequestHandler<unknown, unknown, unknown>, 'lists'>;
-
+export type ListsPluginStart = void;
 export interface PluginsSetup {
   security: SecurityPluginSetup | undefined | null;
   spaces: SpacesPluginSetup | undefined | null;
 }
 
+export type GetListClientType = (
+  dataClient: APICaller,
+  spaceId: string,
+  user: string
+) => ListClient;
+export interface ListPluginSetup {
+  getListClient: GetListClientType;
+}
+
 export type ContextProviderReturn = Promise<{ getListClient: () => ListClient }>;
 declare module 'src/core/server' {
   interface RequestHandlerContext {