add local provider, add cover output in textinfo

provider/local_helper.go

@@ -0,0 +1,73 @@
+package provider
+
+import (
+	"AynaLivePlayer/config"
+	"AynaLivePlayer/player"
+	"AynaLivePlayer/util"
+	"github.com/dhowden/tag"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+func getPlaylistNames() []string {
+	names := make([]string, 0)
+	items, _ := ioutil.ReadDir(config.Provider.LocalDir)
+	for _, item := range items {
+		if item.IsDir() {
+			names = append(names, item.Name())
+		}
+	}
+	return names
+}
+
+// readLocalPlaylist read files under a directory
+// and return a _LocalPlaylist object.
+// This function assume this directory exists
+func readLocalPlaylist(playlist *_LocalPlaylist) error {
+	p1th := playlist.Name
+	playlist.Medias = make([]*player.Media, 0)
+	fullPath := filepath.Join(config.Provider.LocalDir, p1th)
+	if _, err := os.Stat(fullPath); os.IsNotExist(err) {
+		return err
+	}
+	items, _ := ioutil.ReadDir(fullPath)
+	for _, item := range items {
+		// if item is a file, read file
+		if !item.IsDir() {
+			fn := item.Name()
+			media := player.Media{
+				Meta: Meta{
+					Name: LocalAPI.GetName(),
+					Id:   filepath.Join(fullPath, fn),
+				},
+			}
+			if readMediaFile(&media) != nil {
+				continue
+			}
+			playlist.Medias = append(playlist.Medias, &media)
+		}
+	}
+	return nil
+}
+
+func readMediaFile(media *player.Media) error {
+	p := media.Meta.(Meta).Id
+	f, err := os.Open(p)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	meta, err := tag.ReadFrom(f)
+	if err != nil {
+		return err
+	}
+	media.Title = util.GetOrDefault(meta.Title(), filepath.Base(p))
+	media.Artist = util.GetOrDefault(meta.Artist(), "Unknown")
+	media.Album = util.GetOrDefault(meta.Album(), "Unknown")
+	media.Lyric = meta.Lyrics()
+	if meta.Picture() != nil {
+		media.Cover.Data = meta.Picture().Data
+	}
+	return nil
+}