Api additions/fixed

- fixed #47 userVote is always null
- changed field userVote to require a userId

src/graphql/schema.graphql

@@ -274,7 +274,7 @@ type Post {
     createdAt: String!
 
     "the type of vote the user performed on the post"
-    userVote: VoteType
+    userVote(userId: ID!): VoteType
 }
 
 "represents a request of any type"

src/lib/models/Post.ts

@@ -1,5 +1,5 @@
 import * as sqz from "sequelize";
-import {BelongsTo, BelongsToMany, Column, CreatedAt, ForeignKey, Model, NotNull, Table,} from "sequelize-typescript";
+import {BelongsTo, BelongsToMany, Column, CreatedAt, ForeignKey, Model, NotNull, Table} from "sequelize-typescript";
 import markdown from "../markdown";
 import {PostVote, VoteType} from "./PostVote";
 import {User} from "./User";
@@ -44,6 +44,11 @@ export class Post extends Model<Post> {
         return (await this.votes()).filter((v) => v.PostVote.voteType === VoteType.DOWNVOTE).length;
     }
 
+    /**
+     * Toggles the vote of the user.
+     * @param userId
+     * @param type
+     */
     public async vote(userId: number, type: VoteType): Promise<VoteType> {
         type = type ?? VoteType.UPVOTE;
         let votes = await this.$get("rVotes", {where: {id: userId}}) as Array<User & {PostVote: PostVote}>;
@@ -67,4 +72,13 @@ export class Post extends Model<Post> {
 
         return vote.PostVote.voteType;
     }
+
+    /**
+     * Returns the type of vote that was performend on the post by the user specified by the user id.
+     * @param userId
+     */
+    public async userVote({userId}: {userId: number}): Promise<VoteType> {
+        const votes = await this.$get("rVotes", {where: {id: userId}}) as Array<User & {PostVote: PostVote}>;
+        return votes[0]?.PostVote?.voteType;
+    }
 }