canape/backend/shows/shows.go

package shows

import (
	"encoding/json"
	"fmt"
	"os"
	"path/filepath"
	"strings"

	"git.quimbo.fr/odwrtw/canape/backend/backend"
	"git.quimbo.fr/odwrtw/canape/backend/users"
	"git.quimbo.fr/odwrtw/canape/backend/web"
	"github.com/odwrtw/papi"
	polochon "github.com/odwrtw/polochon/lib"
	"github.com/sirupsen/logrus"
)

// Show represents a show
type Show struct {
	client *papi.Client
	pShow  *papi.Show
	*polochon.Show
	TrackedSeason  *int `json:"tracked_season"`
	TrackedEpisode *int `json:"tracked_episode"`
	publicDir      string
	imgURLPrefix   string
}

// MarshalJSON implements the Marshal interface
func (s *Show) MarshalJSON() ([]byte, error) {
	type alias Show
	// Create the structure that we want to marshal
	showToMarshal := &struct {
		*alias
		Episodes  []Episode `json:"episodes"`
		BannerURL string    `json:"banner_url"`
		FanartURL string    `json:"fanart_url"`
		PosterURL string    `json:"poster_url"`
	}{
		alias:     (*alias)(s),
		BannerURL: s.GetImageURL("banner"),
		FanartURL: s.GetImageURL("fanart"),
		PosterURL: s.GetImageURL("poster"),
	}

	// Create Episode obj from polochon.Episodes and add them to the object to
	// marshal
	for _, e := range s.Show.Episodes {
		showToMarshal.Episodes = append(showToMarshal.Episodes, Episode{
			ShowEpisode: e,
			client:      s.client,
			pShow:       s.pShow,
		})
	}
	return json.Marshal(showToMarshal)
}

// New returns a new Show with a polochon ShowConfig
func New(imdbID string, publicDir, imgURLPrefix string) *Show {
	return &Show{
		Show: &polochon.Show{
			ImdbID: imdbID,
		},
		publicDir:    publicDir,
		imgURLPrefix: imgURLPrefix,
	}
}

// NewWithClient returns a new Show with a polochon ShowConfig
func NewWithClient(imdbID string, client *papi.Client, pShow *papi.Show, wShow *backend.WishedShow, publicDir, imgURLPrefix string) *Show {
	s := &Show{
		Show: &polochon.Show{
			ImdbID: imdbID,
		},
		client:       client,
		pShow:        pShow,
		publicDir:    publicDir,
		imgURLPrefix: imgURLPrefix,
	}
	if wShow != nil {
		s.TrackedSeason = &wShow.Season
		s.TrackedEpisode = &wShow.Episode
	}
	return s
}

// GetDetails retrieves details for the show with the given detailers
func (s *Show) GetDetails(env *web.Env, detailers []polochon.Detailer) error {
	log := env.Log.WithFields(logrus.Fields{
		"imdb_id":  s.ImdbID,
		"function": "shows.GetDetails",
	})
	var detailersName []string
	for _, d := range detailers {
		detailersName = append(detailersName, d.Name())
	}
	log.Debugf("getting details with %s", strings.Join(detailersName, ", "))

	s.Detailers = detailers

	// Get the details
	err := polochon.GetDetails(s.Show, env.Log)
	if err != nil {
		return err
	}

	log.Debugf("got details from detailers")

	return nil
}

// GetAndFetch retrieves details for the show with the given
// detailers 'before'
// If found, return
// If not, retrives details with the detailers 'after' and update them in
// database
func (s *Show) GetAndFetch(env *web.Env, before []polochon.Detailer, after []polochon.Detailer) error {
	log := env.Log.WithFields(logrus.Fields{
		"imdb_id":  s.ImdbID,
		"function": "shows.GetAndFetch",
	})

	// Try to get details with the first batch of Detailers
	err := s.GetDetails(env, before)
	if err == nil {
		log.Debug("show found in first try")
		return nil
	}
	log.Debugf("show not found in database: %s", err)

	// If not found, try the second batch and upsert
	return s.Refresh(env, after)
}

// Refresh retrieves details for the show with the given detailers
// and update them in database
func (s *Show) Refresh(env *web.Env, detailers []polochon.Detailer) error {
	// Refresh
	err := s.GetDetails(env, detailers)
	if err != nil {
		return err
	}

	// Download show images
	s.downloadImages(env)

	env.Log.Debug("images downloaded")

	// If found, update in database
	return backend.UpsertShow(env.Database, s.Show)
}

// GetImageURL returns the image URL or the default image if the poster is not yet downloaded
func (s *Show) GetImageURL(imgType string) string {
	// Check if the show image exists
	if _, err := os.Stat(s.imgFile(imgType)); os.IsNotExist(err) {
		// TODO image in the config ?
		return s.imgURLPrefix + "noimage.png"
	}
	return s.imgURLPrefix + s.imgURL(imgType)
}

// downloadImages will download the show images
func (s *Show) downloadImages(env *web.Env) {
	// Download the banner
	err := web.Download(s.Show.Banner, s.imgFile("banner"), false)
	if err != nil {
		env.Log.Errorf("failed to dowload banner: %s", err)
	}
	err = web.Download(s.Show.Fanart, s.imgFile("fanart"), false)
	if err != nil {
		env.Log.Errorf("failed to dowload fanart: %s", err)
	}
	err = web.Download(s.Show.Poster, s.imgFile("poster"), true)
	if err != nil {
		env.Log.Errorf("failed to dowload poster: %s", err)
	}
}

// imgURL returns the default image url
func (s *Show) imgURL(imgType string) string {
	return fmt.Sprintf("shows/%s-%s.jpg", s.ImdbID, imgType)
}

// imgFile returns the image location on disk
func (s *Show) imgFile(imgType string) string {
	return filepath.Join(s.publicDir, "img", s.imgURL(imgType))
}

// getPolochonShows returns all the Shows from the polochon of a user
func getPolochonShows(env *web.Env, user *users.User) ([]*Show, error) {
	shows := []*Show{}

	client, err := user.NewPapiClient()
	if err != nil {
		return shows, err
	}

	// Get the polochon's shows
	pshows, err := client.GetShows()
	if err != nil {
		return shows, err
	}

	wShows, err := backend.GetShowWishlist(env.Database, user.ID)
	if err != nil {
		return shows, err
	}

	// Create Shows objects from the shows retrieved
	for _, pShow := range pshows.List() {
		wShow, _ := wShows.IsShowInWishlist(pShow.ImdbID)
		show := NewWithClient(pShow.ImdbID, client, pShow, wShow, env.Config.PublicDir, env.Config.ImgURLPrefix)
		shows = append(shows, show)
	}
	return shows, nil
}

// LastSeasonEpisodes will return the episodes of the last season of the show
func (s *Show) LastSeasonEpisodes() []*polochon.ShowEpisode {
	episodes := make(map[int][]*polochon.ShowEpisode)
	lastSeason := 0
	for _, e := range s.Episodes {
		if lastSeason < e.Season {
			lastSeason = e.Season
		}
		episodes[e.Season] = append(episodes[e.Season], e)
	}
	return episodes[lastSeason]
}