seshat/backend/nestjs-seshat-api/src/library/library.service.ts

import { InjectQueue } from '@nestjs/bullmq';
import { Injectable } from '@nestjs/common';
import { Queue } from 'bullmq';
import { PinoLogger } from 'nestjs-pino';
import { BooksService } from 'src/books/books.service';
import { BookSearchResultDto } from 'src/providers/dto/book-search-result.dto';
import { CreateSeriesDto } from 'src/series/dto/create-series.dto';
import { SeriesSubscriptionDto } from 'src/series/dto/series-subscription.dto';
import { SeriesDto } from 'src/series/dto/series.dto';
import { SeriesService } from 'src/series/series.service';
import { BookOriginType } from 'src/shared/enums/book_origin_type';

@Injectable()
export class LibraryService {
  constructor(
    private readonly books: BooksService,
    private readonly series: SeriesService,
    @InjectQueue('library') private readonly jobs: Queue,
    private readonly logger: PinoLogger,
  ) { }


  async addSeries(series: CreateSeriesDto) {
    const result = await this.series.addSeries(series);

    this.logger.debug({
      class: LibraryService.name,
      method: this.addSubscription.name,
      series: series,
      msg: 'Series saved to database.',
    });

    this.jobs.add('new_series', series);
    return {
      success: true,
    };
  }

  async addSubscription(series: SeriesSubscriptionDto) {
    return await this.series.addSeriesSubscription({
      userId: series.userId,
      providerSeriesId: series.providerSeriesId,
      provider: series.provider,
    });
  }

  async addBook(book: BookSearchResultDto) {
    this.logger.debug({
      class: LibraryService.name,
      method: this.addBook.name,
      book: book,
      msg: 'Saving book to database...',
    });

    const bookData = await this.books.createBook({
      title: book.title,
      desc: book.desc,
      providerSeriesId: book.providerSeriesId,
      providerBookId: book.providerBookId,
      volume: book.volume,
      provider: book.provider,
      publishedAt: book.publishedAt,
    });
    const bookId = bookData.identifiers[0]['bookId'];

    const tasks = [];

    if (book.authors && book.authors.length > 0) {
      tasks.push(book.authors.map(author => this.books.addBookOrigin({
        bookId,
        type: BookOriginType.AUTHOR,
        value: author,
      })));
    }
    if (book.categories && book.categories.length > 0) {
      tasks.push(book.categories.map(category => this.books.addBookOrigin({
        bookId,
        type: BookOriginType.CATEGORY,
        value: category
      })));
    }
    if (book.language) {
      tasks.push(this.books.addBookOrigin({
        bookId,
        type: BookOriginType.LANGUAGE,
        value: book.language,
      }));
    }
    if (book.maturityRating) {
      tasks.push(this.books.addBookOrigin({
        bookId,
        type: BookOriginType.MATURITY_RATING,
        value: book.maturityRating,
      }));
    }
    if (book.thumbnail) {
      tasks.push(this.books.addBookOrigin({
        bookId,
        type: BookOriginType.PROVIDER_THUMBNAIL,
        value: book.thumbnail,
      }));
    }
    if (book.url) {
      tasks.push(this.books.addBookOrigin({
        bookId,
        type: BookOriginType.PROVIDER_URL,
        value: book.url,
      }));
    }

    if ('ISBN_10' in book.industryIdentifiers) {
      tasks.push(this.books.addBookOrigin({
        bookId,
        type: BookOriginType.ISBN_10,
        value: book.industryIdentifiers['ISBN_10'],
      }));
    }

    if ('ISBN_13' in book.industryIdentifiers) {
      tasks.push(this.books.addBookOrigin({
        bookId,
        type: BookOriginType.ISBN_10,
        value: book.industryIdentifiers['ISBN_13'],
      }));
    }

    await Promise.all(tasks);

    this.logger.info({
      class: LibraryService.name,
      method: this.addBook.name,
      book: book,
      msg: 'Book saved to database.',
    });

    return bookId;
  }

  async updateSeries(series: CreateSeriesDto) {
    return await this.jobs.add('update_series', series);
  }

  async getBooksFromSeries(series: SeriesDto) {
    return await this.books.findBooksFromSeries(series);
  }
}