goyomi/sources/base/senkuro/senkuro.go

// Package senkuro implements the Senkuro GraphQL base.
package senkuro

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"strings"

	"goyomi/internal/httpclient"
	"goyomi/internal/source"
	"goyomi/sources/base/util"
)

type Config struct {
	Name   string
	BaseURL string
	APIURL string
	Lang   string
}

type Source struct {
	cfg    Config
	client *httpclient.Client
	id     int64
}

func New(cfg Config) *Source {
	if cfg.APIURL == "" {
		cfg.APIURL = strings.TrimRight(cfg.BaseURL, "/") + "/api/graphql"
	}
	c := httpclient.NewClient(httpclient.WithRateLimit(1, 2))
	return &Source{cfg: cfg, client: c, id: source.GenerateSourceID(cfg.Name, cfg.Lang)}
}

func (s *Source) ID() int64           { return s.id }
func (s *Source) Name() string        { return s.cfg.Name }
func (s *Source) Lang() string        { return s.cfg.Lang }
func (s *Source) SupportsLatest() bool { return true }

type gqlRequest struct {
	Query     string         `json:"query"`
	Variables map[string]any `json:"variables,omitempty"`
}

func (s *Source) gql(ctx context.Context, query string, vars map[string]any, out any) error {
	body, _ := json.Marshal(gqlRequest{Query: query, Variables: vars})
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, s.cfg.APIURL, bytes.NewReader(body))
	if err != nil {
		return err
	}
	req.Header.Set("Content-Type", "application/json")
	resp, err := s.client.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	raw, _ := io.ReadAll(resp.Body)
	var wrapper struct {
		Data   json.RawMessage `json:"data"`
		Errors []struct{ Message string `json:"message"` } `json:"errors"`
	}
	if err := json.Unmarshal(raw, &wrapper); err != nil {
		return err
	}
	if len(wrapper.Errors) > 0 {
		return fmt.Errorf("senkuro: %s", wrapper.Errors[0].Message)
	}
	return json.Unmarshal(wrapper.Data, out)
}

type comicDTO struct {
	ID          string `json:"id"`
	Slug        string `json:"slug"`
	Title       string `json:"localizedTitle"`
	Cover       string `json:"cover"`
	Description string `json:"description"`
	Status      string `json:"status"`
}

const listQuery = `query($page: Int, $perPage: Int, $sort: ComicSort, $q: String) {
  comics(page: $page, perPage: $perPage, sort: $sort, search: $q) {
    data { id slug localizedTitle cover }
    hasNextPage
  }
}`

func (s *Source) fetchList(ctx context.Context, page int, sort, q string) (source.MangasPage, error) {
	vars := map[string]any{"page": page, "perPage": 20, "sort": sort}
	if q != "" {
		vars["q"] = q
	}
	var result struct {
		Comics struct {
			Data        []comicDTO `json:"data"`
			HasNextPage bool       `json:"hasNextPage"`
		} `json:"comics"`
	}
	if err := s.gql(ctx, listQuery, vars, &result); err != nil {
		return source.MangasPage{}, err
	}
	mangas := make([]source.SManga, len(result.Comics.Data))
	for i, c := range result.Comics.Data {
		mangas[i] = source.SManga{
			URL:          fmt.Sprintf("/comics/%s", c.Slug),
			Title:        c.Title,
			ThumbnailURL: c.Cover,
		}
	}
	return source.MangasPage{Mangas: mangas, HasNextPage: result.Comics.HasNextPage}, nil
}

func (s *Source) GetPopularManga(page int) (source.MangasPage, error) {
	return s.fetchList(context.Background(), page, "POPULARITY", "")
}
func (s *Source) GetLatestUpdates(page int) (source.MangasPage, error) {
	return s.fetchList(context.Background(), page, "LATEST_UPDATE", "")
}
func (s *Source) GetSearchManga(page int, query string, filters []source.Filter) (source.MangasPage, error) {
	return s.fetchList(context.Background(), page, "RELEVANCE", query)
}

func (s *Source) GetMangaDetails(manga source.SManga) (source.SManga, error) {
	slug := util.SlugFromURL(manga.URL)
	const q = `query($slug: String!) { comic(slug: $slug) { id slug localizedTitle cover description status } }`
	var result struct{ Comic comicDTO `json:"comic"` }
	if err := s.gql(context.Background(), q, map[string]any{"slug": slug}, &result); err != nil {
		return manga, err
	}
	c := result.Comic
	return source.SManga{
		URL:          manga.URL,
		Title:        c.Title,
		Description:  c.Description,
		Status:       util.StatusFromString(c.Status),
		ThumbnailURL: c.Cover,
	}, nil
}

func (s *Source) GetChapterList(manga source.SManga) ([]source.SChapter, error) {
	slug := util.SlugFromURL(manga.URL)
	const q = `query($slug: String!) { comic(slug: $slug) { chapters { id slug number title createdAt } } }`
	var result struct {
		Comic struct {
			Chapters []struct {
				ID        string  `json:"id"`
				Slug      string  `json:"slug"`
				Number    float32 `json:"number"`
				Title     string  `json:"title"`
				CreatedAt string  `json:"createdAt"`
			} `json:"chapters"`
		} `json:"comic"`
	}
	if err := s.gql(context.Background(), q, map[string]any{"slug": slug}, &result); err != nil {
		return nil, err
	}
	chapters := make([]source.SChapter, len(result.Comic.Chapters))
	for i, ch := range result.Comic.Chapters {
		name := fmt.Sprintf("Chapter %.1f", ch.Number)
		if ch.Title != "" {
			name += " - " + ch.Title
		}
		chapters[i] = source.SChapter{
			URL:        fmt.Sprintf("/comics/%s/%s", slug, ch.Slug),
			Name:       name,
			DateUpload: util.ParseAbsoluteDate(ch.CreatedAt, "2006-01-02T15:04:05Z"),
		}
	}
	return chapters, nil
}

func (s *Source) GetPageList(chapter source.SChapter) ([]source.Page, error) {
	parts := strings.Split(strings.Trim(chapter.URL, "/"), "/")
	if len(parts) < 3 {
		return nil, fmt.Errorf("senkuro: invalid chapter URL")
	}
	comicSlug := parts[1]
	chSlug := parts[2]
	const q = `query($comicSlug: String!, $chapterSlug: String!) {
		chapter(comicSlug: $comicSlug, slug: $chapterSlug) { pages { index image } }
	}`
	var result struct {
		Chapter struct {
			Pages []struct {
				Index int    `json:"index"`
				Image string `json:"image"`
			} `json:"pages"`
		} `json:"chapter"`
	}
	if err := s.gql(context.Background(), q, map[string]any{"comicSlug": comicSlug, "chapterSlug": chSlug}, &result); err != nil {
		return nil, err
	}
	pages := make([]source.Page, len(result.Chapter.Pages))
	for i, p := range result.Chapter.Pages {
		pages[i] = source.Page{Index: p.Index, ImageURL: p.Image}
	}
	return pages, nil
}

func (s *Source) GetImageURL(page source.Page) (string, error) { return page.ImageURL, nil }
func (s *Source) GetFilterList() []source.Filter               { return nil }