implement local storage backendv0.0.2-alpha

The 'local' backend is able to serve the music from a path specified
by '-server-music-dir'.

Add command line options to select the server port as well as a list
of backends.

1 files changed, 29 insertions, 0 deletions

diff --git a/backend.go b/backend.go
new file mode 100644
index 0000000..9cb42f8
--- /dev/null
+++ b/backend.go
@@ -0,0 +1,29 @@
+package main
+
+import (
+	"crypto/sha1"
+	"encoding/base64"
+)
+
+type Backend interface {
+	Play(song *Song, player *Player)
+	Search(keyword string) []Song
+}
+
+type DummyBackend struct{}
+
+func (dummy *DummyBackend) Play(song *Song, player *Player) {
+}
+
+func (dummy *DummyBackend) Search(keyword string) []Song {
+
+	s := NewDummySong("Dummy Mc Crashtest", "exactly "+keyword)
+	return []Song{s}
+}
+
+func NewDummySong(title, artist string) Song {
+	h := sha1.New()
+	h.Write([]byte(title))
+	h.Write([]byte(artist))
+	return NewSong(title, artist, "dummy", base64.URLEncoding.EncodeToString(h.Sum(nil)))
+}