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• nestjs-mercurius-master
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      • extract-loader-metadata.util.ts
      • to-async-iterator.ts
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      • decorate-loader-resolver.util.ts
      • faderation-factory.util.ts
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    • services
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    • graphql
      • app.module.ts
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        • scalars
          • date.scalar.ts
      • config.service.ts
      • async-options-class.module.ts
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      • cats
        • cats-request-scoped.service.ts
        • cats.module.ts
        • cats.types.graphql
        • interfaces
          • cat.interface.ts
        • cats.guard.ts
        • cats.resolvers.ts
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      • main.ts
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        • app.module.ts
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        • user.ts
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        • user.resolver.ts
      • gateway.mjs
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        • post.resolver.ts
        • user.ts
        • app.module.ts
        • post.ts
        • main.ts
        • user.resolver.ts
    • code-first
      • services
        • dog.service.ts
        • cat.service.ts
      • animal.interface.ts
      • resolvers
        • cat.resolver.ts
        • animal.resolver.ts
      • app.module.ts
      • inputs
        • create-cat.input.ts
        • create-dog.input.ts
      • directives
        • upper-case.directive.ts
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        • dog.ts
        • cat.ts
      • main.ts
      • species.enum.ts
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      • app.module.ts
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        • upper-case.directive.ts
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        • hash.scalar.ts
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        • forbidden-exception.filter.ts
      • types
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        • post.type.ts
        • person.interface.ts
      • main.ts
      • app.controller.ts
      • modules
        • user
          • services
            • post.service.ts
            • user.service.ts
            • customer.service.ts
          • resolvers
            • person.resolver.ts
            • customer.resolver.ts
            • search.resolver.ts
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          • inputs
            • create-user.input.ts
            • full-name.args.ts
          • user.module.ts
      • guards
        • auth.guard.ts
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  • CODE_OF_CONDUCT.md
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  • index.js

import {
  Args,
  Context,
  ID,
  Parent,
  Query,
  Resolver,
  Subscription,
} from '@nestjs/graphql';
import { Cat } from '../types/cat';
import { CatService } from '../services/cat.service';
import { ParseIntPipe } from '@nestjs/common';
import { LoaderQuery, ResolveLoader, toAsyncIterator } from '../../../lib';
import { PubSub } from 'mercurius';

@Resolver(() => Cat)
export class CatResolver {
  constructor(private readonly catService: CatService) {}

  @Query(() => [Cat])
  cats() {
    return this.catService.cats();
  }

  @Query(() => Cat, { nullable: true })
  cat(@Args({ name: 'id', type: () => ID }, ParseIntPipe) id: number) {
    return this.catService.cat(id);
  }

  @ResolveLoader(() => Boolean)
  hasFur(@Parent() queries: LoaderQuery<Cat>[]) {
    return queries.map(({ obj }) => obj.lives > 1);
  }

  @Subscription(() => Cat, {
    resolve: (payload) => payload,
  })
  onCatSub(@Context('pubsub') pubSub: PubSub) {
    return toAsyncIterator(pubSub.subscribe('CAT_SUB_TOPIC'));
  }
}