151 lines
4.7 KiB
TypeScript
151 lines
4.7 KiB
TypeScript
import { Inject, Injectable } from '@nestjs/common';
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import {
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Pothos,
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PothosRef,
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PothosSchema,
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SchemaBuilderToken,
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} from '@smatch-corp/nestjs-pothos';
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import { Builder } from '../Graphql/graphql.builder';
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import { PrismaService } from '../Prisma/prisma.service';
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@Injectable()
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export class MessageSchema extends PothosSchema {
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constructor(
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@Inject(SchemaBuilderToken) private readonly builder: Builder,
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private readonly prisma: PrismaService,
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) {
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super();
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}
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@PothosRef()
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message() {
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return this.builder.prismaObject('Message', {
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description: 'A message in the system.',
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fields: (t) => ({
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id: t.exposeID('id', {
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description: 'The ID of the message.',
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}),
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senderId: t.exposeID('senderId', {
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description: 'The ID of the sender.',
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}),
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chatRoomId: t.exposeID('chatRoomId', {
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description: 'The ID of the chat room.',
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}),
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message: t.expose('message', {
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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type: 'Json' as any,
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description: 'The message content.',
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}),
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sentAt: t.expose('sentAt', {
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type: 'DateTime',
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description: 'The date and time the message was sent.',
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}),
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sender: t.relation('sender', {
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description: 'The sender of the message.',
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}),
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chatRoom: t.relation('chatRoom', {
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description: 'The chat room.',
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}),
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}),
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});
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}
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@Pothos()
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init(): void {
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this.builder.queryFields((t) => ({
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message: t.prismaField({
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type: this.message(),
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description: 'Retrieve a single message by its unique identifier.',
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args: this.builder.generator.findUniqueArgs('Message'),
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resolve: async (query, root, args) => {
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return await this.prisma.message.findUnique({
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...query,
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where: args.where,
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});
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},
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}),
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messages: t.prismaField({
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type: [this.message()],
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description:
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'Retrieve a list of messages with optional filtering, ordering, and pagination.',
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args: this.builder.generator.findManyArgs('Message'),
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resolve: async (query, root, args) => {
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return await this.prisma.message.findMany({
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...query,
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skip: args.skip ?? undefined,
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take: args.take ?? undefined,
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orderBy: args.orderBy ?? undefined,
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where: args.filter ?? undefined,
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});
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},
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}),
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messagesByChatRoomId: t.prismaField({
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type: [this.message()],
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description: 'Retrieve a list of messages by chat room ID.',
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args: this.builder.generator.findManyArgs('Message'),
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resolve: async (query, root, args) => {
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return await this.prisma.message.findMany({
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...query,
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where: args.filter ?? undefined,
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});
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},
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}),
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}));
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// mutations
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this.builder.mutationFields((t) => ({
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sendMessage: t.prismaField({
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type: this.message(),
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description: 'Send a message to a chat room.',
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args: {
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input: t.arg({
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type: this.builder.generator.getCreateInput('Message'),
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description: 'The message to send.',
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required: true,
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}),
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},
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resolve: async (query, root, args, ctx, info) => {
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const message = await this.prisma.message.create({
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...query,
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data: args.input,
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});
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if (ctx.isSubscription) {
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throw new Error('Not allowed');
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}
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ctx.http.pubSub.publish('MESSAGE_SENT', message);
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return message;
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},
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}),
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}));
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// subscriptions
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/* The code snippet `subscriptions` is currently commented out in the provided TypeScript class. It
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appears to be a placeholder or a section where subscription-related logic or fields could be
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defined. In GraphQL, subscriptions are used to listen for real-time events or changes in data
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and receive updates when those events occur. */
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this.builder.subscriptionFields((t) => ({
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messageSent: t.field({
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subscribe: (_, __, ctx) => {
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if (!ctx.isSubscription) {
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throw new Error('Not allowed');
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}
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return {
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[Symbol.asyncIterator]: () =>
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ctx.websocket.pubSub.asyncIterator('MESSAGE_SENT'),
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};
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},
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type: this.message(), // Add the type property
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resolve: (payload) =>
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payload as {
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message: 'Json';
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id: string;
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senderId: string;
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chatRoomId: string;
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sentAt: Date;
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},
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}),
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}));
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}
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}
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