1 files changed, 122 insertions, 0 deletions
diff --git a/media/library.go b/media/library.go
new file mode 100644
index 0000000..87fb223
--- /dev/null
+++ b/media/library.go
@@ -0,0 +1,122 @@
+package media
+
+import (
+	"errors"
+	"io/ioutil"
+	"log"
+	"path"
+	"path/filepath"
+	"sort"
+	"strings"
+	"sync"
+)
+
+// Library manages importing and retrieving video data.
+type Library struct {
+	mu     sync.RWMutex
+	Paths  map[string]*Path
+	Videos map[string]*Video
+}
+
+// NewLibrary returns new instance of Library.
+func NewLibrary() *Library {
+	lib := &Library{
+		Paths:  make(map[string]*Path),
+		Videos: make(map[string]*Video),
+	}
+	return lib
+}
+
+// AddPath adds a media path to the library.
+func (lib *Library) AddPath(p *Path) error {
+	lib.mu.Lock()
+	defer lib.mu.Unlock()
+	// make sure new path doesn't collide with existing ones
+	for _, p2 := range lib.Paths {
+		if p.Path == p2.Path {
+			return errors.New("media: duplicate library path")
+		}
+		if p.Prefix == p2.Prefix {
+			return errors.New("media: duplicate library prefix")
+		}
+	}
+	lib.Paths[p.Path] = p
+	return nil
+}
+
+// Import adds all valid videos from a given path.
+func (lib *Library) Import(p *Path) error {
+	files, err := ioutil.ReadDir(p.Path)
+	if err != nil {
+		return err
+	}
+	for _, info := range files {
+		err = lib.Add(path.Join(p.Path, info.Name()))
+		if err != nil {
+			// Ignore files that can't be parsed
+			continue
+		}
+	}
+	return nil
+}
+
+// Add adds a single video from a given file path.
+func (lib *Library) Add(fp string) error {
+	lib.mu.Lock()
+	defer lib.mu.Unlock()
+	fp = filepath.ToSlash(fp)
+	d := path.Dir(fp)
+	p, ok := lib.Paths[d]
+	if !ok {
+		return errors.New("media: path not found")
+	}
+	n := path.Base(fp)
+	v, err := ParseVideo(p, n)
+	if err != nil {
+		return err
+	}
+	lib.Videos[v.ID] = v
+	log.Println("Added:", v.Path)
+	return nil
+}
+
+// Remove removes a single video from a given file path.
+func (lib *Library) Remove(fp string) {
+	lib.mu.Lock()
+	defer lib.mu.Unlock()
+	fp = filepath.ToSlash(fp)
+	d := path.Dir(fp)
+	p, ok := lib.Paths[d]
+	if !ok {
+		return
+	}
+	n := path.Base(fp)
+	// ID is name without extension
+	idx := strings.LastIndex(n, ".")
+	if idx == -1 {
+		idx = len(n)
+	}
+	id := n[:idx]
+	if len(p.Prefix) > 0 {
+		id = path.Join(p.Prefix, id)
+	}
+	v, ok := lib.Videos[id]
+	if ok {
+		delete(lib.Videos, id)
+		log.Println("Removed:", v.Path)
+	}
+}
+
+// Playlist returns a sorted Playlist of all videos.
+func (lib *Library) Playlist() Playlist {
+	lib.mu.RLock()
+	defer lib.mu.RUnlock()
+	pl := make(Playlist, len(lib.Videos))
+	i := 0
+	for _, v := range lib.Videos {
+		pl[i] = v
+		i++
+	}
+	sort.Sort(pl)
+	return pl
+}