added keywords endpoint and types

src/endpoints/index.ts

@@ -14,4 +14,5 @@ export * from './people';
 export * from './review';
 export * from './trending';
 export * from './find';
+export * from './keywords';
 

src/endpoints/keywords.ts

@@ -0,0 +1,20 @@
+import { BaseEndpoint } from './base';
+import querystring from 'querystring';
+import { BelongingMovies, Keyword, KeywordsOptions } from '../types';
+
+const BASE_Keyword = '/keyword';
+
+export class KeywordsEndpoint extends BaseEndpoint {
+  constructor(accessToken: string) {
+    super(accessToken);
+  }
+
+  async details(keywordId : number): Promise<Keyword> {
+    return await this.api.get<Keyword>(`${BASE_Keyword}/${keywordId}`);
+  }
+
+  async belongingMovies(keywordId : number, options?: KeywordsOptions): Promise<BelongingMovies> {
+    const params = querystring.encode(options);
+    return await this.api.get<BelongingMovies>(`${BASE_Keyword}/${keywordId}/movies?${params}`);
+  }
+}