check for automation user in testDatasource()

Author: TheSpacyCat

src/DataSource.ts

@@ -54,4 +54,8 @@ export class DataSource extends DataSourceApi<CmkQuery> {
     }
     return this.restBackend;
   }
+
+  getUsername(): string {
+    return this.instanceSettings.jsonData.username!;
+  }
 }

src/backend/rest.ts

@@ -89,13 +89,24 @@ export default class RestApiBackend implements Backend {
         'The data source specified the Checkmk Enterprise Edition, but Checkmk Raw Edition was detected. Please choose the raw edition in the data source settings.'
       );
     }
+    // The REST API would be ok with other users, but the autocompleter are not
+    if (!(await this.isAutomationUser(this.datasource.getUsername()))) {
+      throw new Error('This data source must authenticate against Checkmk using an automation user.');
+    }
     return {
       status: 'success',
       message: `Data source is working, reached version ${checkMkVersion} of checkmk`,
       title: 'Success',
     };
   }
 
+  async isAutomationUser(username: string): Promise<boolean> {
+    const response = await this.api<any>({
+      url: `/objects/user_config/${username}`,
+    });
+    return response.data['extensions']['auth_option']['auth_type'] === 'automation';
+  }
+
   async api<T>(request: BackendSrvRequest): Promise<FetchResponse<T>> {
     const defaults = {
       headers: { 'Content-Type': 'application/json' },

src/backend/types.ts

@@ -11,4 +11,6 @@ export interface DatasourceOptions {
   getBackend: () => Backend;
   getEdition: () => Edition;
   getUrl: () => string | undefined;
+
+  getUsername(): string;
 }