Move all firbase dependencies from actions layer to firebaseService layer (#13)

app/firebaseServices/votes/VoteService.ts

@@ -2,16 +2,56 @@
 import { firebaseRef, firebaseAuth } from 'app/firebase/'
 
 import { SocialError } from 'domain/common'
+import { Vote } from 'domain/votes'
 import { IVoteService } from 'services/votes'
 
 /**
  * Firbase vote service
- * 
+ *
  * @export
  * @class VoteService
  * @implements {IVoteService}
  */
 export class VoteService implements IVoteService {
 
+  public addVote: (vote: Vote)
+    => Promise<string> = (vote) => {
+      return new Promise<string>((resolve,reject) => {
+        let voteRef = firebaseRef.child(`postVotes/${vote.postId}`)
+        .push(vote)
+        voteRef.then(() => {
+          resolve(voteRef.key!)
+        })
+        .catch((error: any) => {
+          reject(new SocialError(error.code,error.message))
+        })
+      })
+    }
+  public getVotes: ()
+    => Promise<{ [postId: string]: { [voteId: string]: Vote } }> = () => {
+      return new Promise<{ [postId: string]: { [voteId: string]: Vote } }>((resolve,reject) => {
+        let votesRef: any = firebaseRef.child(`postVotes`)
 
-}
+        votesRef.on('value',(snapshot: any) => {
+          let postVotes: {[postId: string]: {[voteId: string]: Vote}} = snapshot.val() || {}
+          resolve(postVotes)
+        })
+
+      })
+    }
+
+  public deleteVote: (voteId: string, postId: string)
+    => Promise<void> = (voteId, postId) => {
+      return new Promise<void>((resolve,reject) => {
+        let updates: any = {}
+        updates[`postVotes/${postId}/${voteId}`] = null
+        firebaseRef.update(updates).then(() => {
+          resolve()
+        })
+        .catch((error: any) => {
+          reject(new SocialError(error.code,error.message))
+        })
+      })
+    }
+
+}