Realtime database Transaction Implementation #1118

Author: EddyVerbruggen

src/firebase.d.ts

@@ -48,6 +48,7 @@ export enum LogComplexEventTypeParameter {
   ARRAY,
   BOOLEAN
 }
+
 /**
  * The allowed values for QueryOptions.orderBy.type.
  */
@@ -519,30 +520,43 @@ export function init(options?: InitOptions): Promise<any>;
 // Database
 export interface OnDisconnect {
   cancel(): Promise<any>;
+
   remove(): Promise<any>;
+
   set(value: any): Promise<any>;
+
   setWithPriority(
       value: any,
       priority: number | string
   ): Promise<any>;
+
   update(values: Object): Promise<any>;
 }
+
 export interface DataSnapshot {
-  key: string,
-  ref: any, // TODO: Type it so that it returns a databaseReference.
-  child(path: string): DataSnapshot,
-  exists(): boolean,
-  forEach(action: (snapshot: DataSnapshot) => any) : boolean,
-  getPriority(): string | number | null,
-  hasChild(path: string): boolean,
-  hasChildren(): boolean,
-  numChildren(): number,
-  toJSON(): Object,
-  val(): any
-};
+  key: string;
+  ref: any; // TODO: Type it so that it returns a databaseReference.
+  child(path: string): DataSnapshot;
+
+  exists(): boolean;
+
+  forEach(action: (snapshot: DataSnapshot) => any): boolean;
+
+  getPriority(): string | number | null;
+
+  hasChild(path: string): boolean;
+
+  hasChildren(): boolean;
+
+  numChildren(): number;
+
+  toJSON(): Object;
+
+  val(): any;
+}
 
 export function transaction(path: string, transactionUpdate: (a: any) => any,
-  onComplete?: (error: Error | null, committed: boolean, dataSnapshot: DataSnapshot) => any): Promise<any>;
+                            onComplete?: (error: Error | null, committed: boolean, dataSnapshot: DataSnapshot) => any): Promise<any>;
 
 export function push(path: string, value: any): Promise<PushResult>;