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app_subtitle.go
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/
app_subtitle.go
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package app
import (
"errors"
"fmt"
"time"
"github.com/fatih/set"
"github.com/tympanix/supper/list"
"github.com/tympanix/supper/logutil"
"github.com/tympanix/supper/notify"
"github.com/tympanix/supper/types"
"golang.org/x/text/language"
"golang.org/x/text/language/display"
)
// DownloadSubtitles downloads subtitles for a whole list of mediafiles for every
// langauge in the language set
func (a *Application) DownloadSubtitles(input types.LocalMediaList, lang set.Interface, c chan<- *notify.Entry) ([]types.LocalSubtitle, error) {
var result []types.LocalSubtitle
if input == nil {
return nil, errors.New("no media supplied for subtitles")
}
if lang == nil {
return nil, errors.New("no languages supplied for subtitles")
}
video := input.FilterVideo()
if video.Len() == 0 {
return nil, errors.New("no video media found in path")
}
video, err := video.FilterMissingSubs(lang)
if err != nil {
return nil, err
}
// Iterate all media files in the list
for i, item := range video.List() {
ctx := notify.WithFields(notify.Fields{
"media": item,
"item": fmt.Sprintf("%v/%v", i+1, video.Len()),
})
cursubs, err := item.ExistingSubtitles()
if err != nil {
return nil, err
}
missingLangs := set.Difference(lang, cursubs.LanguageSet())
if missingLangs.Size() == 0 {
continue
}
var subs = list.Subtitles()
if !a.Config().Dry() {
var search []types.OnlineSubtitle
search, err = a.SearchSubtitles(item)
if err != nil {
c <- ctx.WithError(err).Error("Subtitle failed")
if a.Config().Strict() {
return nil, err
}
continue
}
subs, err = list.NewSubtitlesFromInterface(search)
if err != nil {
ctx.WithError(err).Fatal("Subtitle error")
}
}
subs = subs.HearingImpaired(a.Config().Impaired())
// Download subtitle for each language
for _, v := range missingLangs.List() {
l, ok := v.(language.Tag)
if !ok {
return nil, logutil.Errorf("unknown language %v", v)
}
ctx = ctx.WithField("lang", display.English.Languages().Name(l))
if a.Config().Delay() > 0 {
time.Sleep(a.Config().Delay())
}
langsubs := subs.FilterLanguage(l)
if langsubs.Len() == 0 && !a.Config().Dry() {
c <- ctx.Warn("No subtitle available")
continue
}
if !a.Config().Dry() {
rated := langsubs.RateByMedia(item, a.Config().Evaluator())
sub, err := a.downloadBestSubtitle(ctx, item, rated, 3, c)
if err != nil {
if a.Config().Strict() {
return nil, err
}
c <- ctx.WithError(err).Error("Could not download subtitle")
continue
}
result = append(result, sub)
} else {
c <- ctx.WithField("reason", "dry-run").Info("Skip download")
}
}
}
return result, nil
}
func (a *Application) downloadBestSubtitle(ctx notify.Context, m types.Video, l types.RatedSubtitleList, retries int, c chan<- *notify.Entry) (types.LocalSubtitle, error) {
if l.Len() == 0 {
return nil, ctx.Warn("No subtitles satisfied media")
}
sub := l.Best()
if sub.Score() < (float32(a.Config().Score()) / 100.0) {
return nil, ctx.Warn("Score too low %.0f%%", sub.Score()*100.0)
}
onl, ok := sub.Subtitle().(types.OnlineSubtitle)
if !ok {
ctx.Fatal("Subtitle could not be cast to online subtitle")
}
srt, err := onl.Download()
if err != nil && retries > 0 {
p := list.RatedSubtitles(l.List()[1:])
if p.Len() <= 0 {
return nil, ctx.Error(err.Error())
}
c <- ctx.WithError(err).Debug("Retrying subtitle")
return a.downloadBestSubtitle(ctx, m, p, retries-1, c)
}
if err != nil {
return nil, ctx.Error(err.Error())
}
defer srt.Close()
saved, err := m.SaveSubtitle(srt, onl.Language())
if err != nil {
return nil, ctx.Error(err.Error())
}
score := fmt.Sprintf("%.0f%%", sub.Score()*100.0)
c <- ctx.WithField("score", score).WithExtra("sub", saved).Info("Subtitle downloaded")
if err := a.execPluginsOnSubtitle(ctx, saved, c); err != nil {
return nil, err
}
return saved, nil
}
func (a *Application) execPluginsOnSubtitle(ctx notify.Context, s types.LocalSubtitle, c chan<- *notify.Entry) error {
for _, plugin := range a.Config().Plugins() {
ctx = ctx.WithField("plugin", plugin.Name())
if err := plugin.Run(s); err != nil {
c <- ctx.Error("Plugin failed")
return err
}
c <- ctx.Info("Plugin finished")
}
return nil
}