Move to promises

Closes https://github.com/Chocobozzz/PeerTube/issues/74

server/models/request/abstract-request-interface.ts

@@ -0,0 +1,12 @@
+import * as Promise from 'bluebird'
+
+export interface AbstractRequestClass <T> {
+  countTotalRequests: () => Promise<number>
+  listWithLimitAndRandom: (limitPods: number, limitRequestsPerPod: number) => Promise<T>
+  removeWithEmptyTo: () => Promise<number>
+  removeAll: () => Promise<void>
+}
+
+export interface AbstractRequestToPodClass {
+  removeByRequestIdsAndPod: (ids: number[], podId: number) => Promise<number>
+}