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uid.go
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uid.go
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package uid
import (
"bytes"
"sync"
"github.com/anacrolix/missinggo/perf"
"github.com/goccy/go-json"
"github.com/op/go-logging"
"github.com/elgatito/elementum/cache"
)
var (
l = &Library{
UIDs: []*UniqueIDs{},
Movies: []*Movie{},
Shows: []*Show{},
Mu: map[MutexType]*sync.RWMutex{},
Containers: map[ContainerType]*LibraryContainer{},
}
log = logging.MustGetLogger("uid")
)
// Get returns singleton instance for Library
func Get() *Library {
return l
}
// Store is storing Containers in cache for future quick-restore.
func (l *Library) Store() error {
defer perf.ScopeTimer()()
l.globalMutex.RLock()
defer l.globalMutex.RUnlock()
var buf bytes.Buffer
if err := json.NewEncoder(&buf).Encode(l.Containers); err != nil {
log.Errorf("Could not encode library state: %s", err)
return err
}
return cache.NewDBStore().SetBytes(cache.LibraryStateKey, buf.Bytes(), cache.LibraryStateExpire)
}
// Restore is restoring Containers from cache to have it in the memory.
func (l *Library) Restore() error {
defer perf.ScopeTimer()()
b, err := cache.NewDBStore().GetBytes(cache.LibraryStateKey)
if err != nil {
return err
}
dump := Library{}
buf := bytes.NewBuffer(b)
if err := json.NewDecoder(buf).Decode(&dump.Containers); err != nil {
log.Errorf("Could not decode library state: %s", err)
return err
}
l.globalMutex.Lock()
defer l.globalMutex.Unlock()
l.Containers = dump.Containers
return nil
}
func (l *Library) GetContainer(id ContainerType) *LibraryContainer {
l.globalMutex.RLock()
if ret, ok := l.Containers[id]; ok {
l.globalMutex.RUnlock()
return ret
}
l.globalMutex.RUnlock()
l.globalMutex.Lock()
defer l.globalMutex.Unlock()
l.Containers[id] = NewLibraryContainer()
return l.Containers[id]
}
func (l *Library) GetMutex(id MutexType) *sync.RWMutex {
l.globalMutex.RLock()
if ret, ok := l.Mu[id]; ok {
l.globalMutex.RUnlock()
return ret
}
l.globalMutex.RUnlock()
l.globalMutex.Lock()
defer l.globalMutex.Unlock()
l.Mu[id] = &sync.RWMutex{}
return l.Mu[id]
}
// IsWatched returns watched state
func (e *Episode) IsWatched() bool {
return e.UIDs != nil && e.UIDs.Playcount != 0
}
// IsWatched returns watched state
func (s *Show) IsWatched() bool {
return s.UIDs != nil && s.UIDs.Playcount != 0
}
// IsWatched returns watched state
func (m *Movie) IsWatched() bool {
return m.UIDs != nil && m.UIDs.Playcount != 0
}
func HasMovies() bool {
return l != nil && l.Movies != nil && len(l.Movies) > 0
}
func HasShows() bool {
return l != nil && l.Shows != nil && len(l.Shows) > 0
}
// GetUIDsFromKodi returns UIDs object for provided Kodi ID
func GetUIDsFromKodi(kodiID int) *UniqueIDs {
if kodiID == 0 {
return nil
}
mu := l.GetMutex(UIDsMutex)
mu.RLock()
defer mu.RUnlock()
for _, u := range l.UIDs {
if u.Kodi == kodiID {
return u
}
}
return nil
}
// GetShowForEpisode returns 'show' and 'episode'
func GetShowForEpisode(kodiID int) (*Show, *Episode) {
if kodiID == 0 {
return nil, nil
}
mu := l.GetMutex(ShowsMutex)
mu.RLock()
defer mu.RUnlock()
for _, s := range l.Shows {
for _, e := range s.Episodes {
if e.UIDs.Kodi == kodiID {
return s, e
}
}
}
return nil, nil
}