Adding typescript definition for 'this' on Middleware and Afterware apply functions.

CHANGELOG.md

@@ -10,7 +10,7 @@ Expect active development and potentially significant breaking changes in the `0
 - Fix: make sure maybeDeepFreeze is called on results returned from setVariables and refetch [PR #1362](https://github.com/apollographql/apollo-client/pull/1362)
 - Fix: use setTimeout to throw uncaught errors in observer.next and observer.error[PR #1367](https://github.com/apollographql/apollo-client/pull/1367)
 - Remove returnPartialData option [PR #1370](https://github.com/apollographql/apollo-client/pull/1370)
-
+- Update TypeScript Middleware and Afterware interfaces to include a datatype for 'this' in apply function.
 
 ### 0.10.1
 - Address deprecation warnings coming from `graphql-tag` [graphql-tag#54](https://github.com/apollographql/graphql-tag/issues/54)

src/transport/afterware.ts

@@ -1,10 +1,12 @@
+import { NetworkInterface } from './networkInterface';
+
 export interface AfterwareResponse {
   response: Response;
   options: RequestInit;
 }
 
 export interface AfterwareInterface {
-  applyAfterware(response: AfterwareResponse, next: Function): any;
+  applyAfterware(this: NetworkInterface, response: AfterwareResponse, next: Function): any;
 }
 
 export interface BatchAfterwareResponse {
@@ -13,5 +15,5 @@ export interface BatchAfterwareResponse {
 }
 
 export interface BatchAfterwareInterface {
-  applyBatchAfterware(response: BatchAfterwareResponse, next: Function): any;
+  applyBatchAfterware(this: NetworkInterface, response: BatchAfterwareResponse, next: Function): any;
 }

src/transport/middleware.ts

@@ -1,12 +1,12 @@
-import { Request } from './networkInterface';
+import { Request, NetworkInterface } from './networkInterface';
 
 export interface MiddlewareRequest {
   request: Request;
   options: RequestInit;
 }
 
 export interface MiddlewareInterface {
-  applyMiddleware(request: MiddlewareRequest, next: Function): void;
+  applyMiddleware(this: NetworkInterface, request: MiddlewareRequest, next: Function): void;
 }
 
 export interface BatchMiddlewareRequest {
@@ -15,5 +15,5 @@ export interface BatchMiddlewareRequest {
 }
 
 export interface BatchMiddlewareInterface {
-  applyBatchMiddleware(request: BatchMiddlewareRequest, next: Function): void;
+  applyBatchMiddleware(this: NetworkInterface, request: BatchMiddlewareRequest, next: Function): void;
 }