Add graphql object that will be returned instead of dbEntity.

backend/src/graphql/model/ContributionMessage.ts

@@ -0,0 +1,37 @@
+import { Field, ObjectType } from 'type-graphql'
+import { ContributionMessage as DbContributionMessage } from '@entity/ContributionMessage'
+import { User } from './User'
+
+@ObjectType()
+export class ContributionMessage {
+  constructor(contributionMessage: DbContributionMessage, user: User) {
+    this.id = contributionMessage.id
+    this.message = contributionMessage.message
+    this.createdAt = contributionMessage.createdAt
+    this.updatedAt = contributionMessage.updatedAt
+    this.type = contributionMessage.type
+    this.userFirstName = user.firstName
+    this.userLastName = user.lastName
+  }
+
+  @Field(() => Number)
+  id: number
+
+  @Field(() => String)
+  message: string
+
+  @Field(() => Date)
+  createdAt: Date
+
+  @Field(() => Date, { nullable: true })
+  updatedAt?: Date | null
+
+  @Field(() => String)
+  type: string
+
+  @Field(() => String, { nullable: true })
+  userFirstName: string | null
+
+  @Field(() => String, { nullable: true })
+  userLastName: string | null
+}