Added deleteable field to Post model

CHANGELOG.md

@@ -31,6 +31,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - findUser not being implemented
 - style issues
 - graphql schema for denyRequest using the wrong parameters
+- sendRequest allowing duplicates
+
+### Added
+
+- Added `deleteable' field on post
 
 
 ## [0.9] - 2019-10-29

src/graphql/resolvers.ts

@@ -125,7 +125,7 @@ export function resolver(req: any, res: any): any {
                     globals.logger.warn(err.message);
                     globals.logger.debug(err.stack);
                     res.status(status.BAD_REQUEST);
-                    return err.graphqlError || err.message;
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
             } else {
                 res.status(status.BAD_REQUEST);
@@ -156,11 +156,11 @@ export function resolver(req: any, res: any): any {
                         value: user.token(),
                     };
                 } catch (err) {
-                    res.status(400);
-                    return err.graphqlError;
+                    res.status(status.BAD_REQUEST);
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
             } else {
-                res.status(400);
+                res.status(status.BAD_REQUEST);
                 return new GraphQLError("No email or password specified.");
             }
         },
@@ -178,7 +178,7 @@ export function resolver(req: any, res: any): any {
                     globals.logger.warn(err.message);
                     globals.logger.debug(err.stack);
                     res.status(status.BAD_REQUEST);
-                    return err.graphqlError || err.message;
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
             } else {
                 res.status(status.BAD_REQUEST);
@@ -193,7 +193,7 @@ export function resolver(req: any, res: any): any {
                     await user.save();
                     return user.settings;
                 } catch (err) {
-                    res.status(400);
+                    res.status(status.BAD_REQUEST);
                     return new GraphQLError("Invalid settings json.");
                 }
             } else {
@@ -278,7 +278,7 @@ export function resolver(req: any, res: any): any {
                     globals.logger.warn(err.message);
                     globals.logger.debug(err.stack);
                     res.status(status.BAD_REQUEST);
-                    return err.graphqlError || err.message;
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
             } else {
                 res.status(status.BAD_REQUEST);
@@ -291,7 +291,12 @@ export function resolver(req: any, res: any): any {
                 return new NotLoggedInGqlError();
             }
             if (receiver && type) {
+                try {
                     return await dataaccess.createRequest(req.session.userId, receiver, type);
+                } catch (err) {
+                    res.status(status.BAD_REQUEST);
+                    return err.graphqlError ?? new GraphQLError(err.message);
+                }
             } else {
                 res.status(status.BAD_REQUEST);
                 return new GraphQLError("No receiver or type given.");
@@ -325,7 +330,7 @@ export function resolver(req: any, res: any): any {
                     globals.logger.warn(err.message);
                     globals.logger.debug(err.stack);
                     res.status(status.BAD_REQUEST);
-                    return err.graphqlError || err.message;
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
             } else {
                 res.status(status.BAD_REQUEST);
@@ -346,7 +351,12 @@ export function resolver(req: any, res: any): any {
         },
         async createGroup({name, members}: { name: string, members: number[] }) {
             if (req.session.userId) {
+                try {
                     return await dataaccess.createGroup(name, req.session.userId, members);
+                } catch (err) {
+                    res.status(status.BAD_REQUEST);
+                    return err.graphqlError ?? new GraphQLError(err.message);
+                }
             } else {
                 return new NotLoggedInGqlError();
             }
@@ -358,7 +368,7 @@ export function resolver(req: any, res: any): any {
                         .changeGroupMembership(id, req.session.userId, dataaccess.MembershipChangeAction.ADD);
                 } catch (err) {
                     res.status(status.BAD_REQUEST);
-                    return err.graphqlError;
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
             } else {
                 res.status(status.UNAUTHORIZED);
@@ -372,7 +382,7 @@ export function resolver(req: any, res: any): any {
                         .changeGroupMembership(id, req.session.userId, dataaccess.MembershipChangeAction.REMOVE);
                 } catch (err) {
                     res.status(status.BAD_REQUEST);
-                    return err.graphqlError;
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
             } else {
                 res.status(status.UNAUTHORIZED);
@@ -392,7 +402,7 @@ export function resolver(req: any, res: any): any {
                         .changeGroupMembership(groupId, userId, dataaccess.MembershipChangeAction.OP);
                 } catch (err) {
                     res.status(status.BAD_REQUEST);
-                    return err.graphqlError;
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
 
             } else {
@@ -417,7 +427,7 @@ export function resolver(req: any, res: any): any {
                         .changeGroupMembership(groupId, userId, dataaccess.MembershipChangeAction.DEOP);
                 } catch (err) {
                     res.status(status.BAD_REQUEST);
-                    return err.graphqlError;
+                    return err.graphqlError ?? new GraphQLError(err.message);
                 }
             } else {
                 res.status(status.UNAUTHORIZED);

src/graphql/schema.graphql

@@ -284,6 +284,9 @@ type Post {
 
     "the type of vote the user performed on the post"
     userVote(userId: ID!): VoteType
+
+    "if the post can be deleted by the specified user"
+    deleteable(userId: ID!): Boolean
 }
 
 "represents a request of any type"

src/lib/dataAccess.ts

@@ -2,7 +2,9 @@ import * as crypto from "crypto";
 import * as sqz from "sequelize";
 import {Sequelize} from "sequelize-typescript";
 import {ChatNotFoundError} from "./errors/ChatNotFoundError";
+import {DuplicatedRequestError} from "./errors/DuplicatedRequestError";
 import {EmailAlreadyRegisteredError} from "./errors/EmailAlreadyRegisteredError";
+import {GroupAlreadyExistsError} from "./errors/GroupAlreadyExistsError";
 import {GroupNotFoundError} from "./errors/GroupNotFoundError";
 import {InvalidLoginError} from "./errors/InvalidLoginError";
 import {NoActionSpecifiedError} from "./errors/NoActionSpecifiedError";
@@ -231,9 +233,16 @@ namespace dataaccess {
     export async function createRequest(sender: number, receiver: number, requestType?: RequestType) {
         requestType = requestType || RequestType.FRIENDREQUEST;
 
+        const requestExists = !!await models.Request.findOne({where:
+                {senderId: sender, receiverId: receiver, requestType}});
+
+        if (!requestExists) {
             const request = await models.Request.create({senderId: sender, receiverId: receiver, requestType});
             globals.internalEmitter.emit(InternalEvents.REQUESTCREATE, request);
             return request;
+        } else {
+            throw new DuplicatedRequestError();
+        }
     }
 
     /**
@@ -243,11 +252,14 @@ namespace dataaccess {
      * @param members
      */
     export async function createGroup(name: string, creator: number, members: number[]): Promise<models.Group> {
+        const groupNameExists = !!await models.Group.findOne({where: {name}});
+        if (!groupNameExists) {
             members = members || [];
             return sequelize.transaction(async (t) => {
                 members.push(creator);
                 const groupChat = await createChat(...members);
-            const group = await models.Group.create({name, creatorId: creator, chatId: groupChat.id}, {transaction: t});
+                const group = await models.Group
+                    .create({name, creatorId: creator, chatId: groupChat.id}, {transaction: t});
                 const creatorUser = await models.User.findByPk(creator, {transaction: t});
                 await group.$add("rAdmins", creatorUser, {transaction: t});
                 for (const member of members) {
@@ -256,6 +268,9 @@ namespace dataaccess {
                 }
                 return group;
             });
+        } else {
+            throw new GroupAlreadyExistsError(name);
+        }
     }
 
     /**

src/lib/errors/DuplicatedRequestError.ts

@@ -0,0 +1,7 @@
+import {BaseError} from "./BaseError";
+
+export class DuplicatedRequestError extends BaseError {
+    constructor() {
+        super(`Request already exists.`);
+    }
+}

src/lib/errors/GroupAlreadyExistsError.ts

@@ -0,0 +1,7 @@
+import {BaseError} from "./BaseError";
+
+export class GroupAlreadyExistsError extends BaseError {
+    constructor(name: string) {
+        super(`A group with the name "${name}" already exists.`);
+    }
+}

src/lib/models/Group.ts

@@ -1,4 +1,14 @@
-import {BelongsTo, BelongsToMany, Column, ForeignKey, HasMany, Model, NotNull, Table} from "sequelize-typescript";
+import {
+    BelongsTo,
+    BelongsToMany,
+    Column,
+    ForeignKey,
+    HasMany,
+    Model,
+    NotNull,
+    Table,
+    Unique,
+} from "sequelize-typescript";
 import {ChatRoom} from "./ChatRoom";
 import {Event} from "./Event";
 import {GroupAdmin} from "./GroupAdmin";
@@ -8,7 +18,8 @@ import {User} from "./User";
 @Table({underscored: true})
 export class Group extends Model<Group> {
     @NotNull
-    @Column({allowNull: false})
+    @Unique
+    @Column({allowNull: false, unique: true})
     public name: string;
 
     @NotNull

src/lib/models/Post.ts

@@ -96,4 +96,12 @@ export class Post extends Model<Post> {
         const votes = await this.$get("rVotes", {where: {id: userId}}) as Array<User & {PostVote: PostVote}>;
         return votes[0]?.PostVote?.voteType;
     }
+
+    /**
+     * Returns if the post can be deleted by the user with the given id.
+     * @param userId
+     */
+    public async deleteable({userId}: {userId: number}): Promise<boolean> {
+        return Number(userId) === Number(this.authorId);
+    }
 }

src/lib/models/Request.ts

@@ -35,10 +35,23 @@ export class Request extends Model<Request> {
     @BelongsTo(() => User, "receiverId")
     public rReceiver: User;
 
+    /**
+     * Wrapper to return the request type for the request
+     */
+    public get type(): RequestType {
+        return this.requestType;
+    }
+
+    /**
+     * The receiver of the request
+     */
     public async receiver(): Promise<User> {
         return await this.$get("rReceiver") as User;
     }
 
+    /**
+     * The sender of the request.
+     */
     public async sender(): Promise<User> {
         return await this.$get("rSender") as User;
     }