added some api calls

Makefile

@@ -0,0 +1,3 @@
+mpd:
+	mkdir -p /tmp/sanic/{music,playlists}
+	mpd --no-daemon ./mpd.conf

NOTES.md

@@ -0,0 +1,20 @@
+# mpd commands
+
+- [x] previous track
+- [x] next track
+- [x] stop
+- [x] play/pause
+- [x] set track progress
+- [x] set volume
+- [x] repeat queue
+- [x] shuffle queue
+- [ ] set fade
+- [ ] add track to queue
+- [ ] rm track from queue
+- [ ] move track in queue
+- [ ] clear queue
+- [ ] list tracks in music db
+- [ ] list playlists
+- [ ] save playlist
+- [ ] delete playlist
+

flake.lock

@@ -28,11 +28,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1694616124,
-        "narHash": "sha256-c49BVhQKw3XDRgt+y+uPAbArtgUlMXCET6VxEBmzHXE=",
+        "lastModified": 1699950847,
+        "narHash": "sha256-xN/yVtqHb7kimHA/WvQFrEG5WS38t0K+A/W+j/WhQWM=",
         "owner": "tweag",
         "repo": "gomod2nix",
-        "rev": "f95720e89af6165c8c0aa77f180461fe786f3c21",
+        "rev": "05c993c9a5bd55a629cd45ed49951557b7e9c61a",
         "type": "github"
       },
       "original": {
@@ -43,11 +43,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1697915759,
-        "narHash": "sha256-WyMj5jGcecD+KC8gEs+wFth1J1wjisZf8kVZH13f1Zo=",
+        "lastModified": 1701237617,
+        "narHash": "sha256-Ryd8xpNDY9MJnBFDYhB37XSFIxCPVVVXAbInNPa95vs=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "51d906d2341c9e866e48c2efcaac0f2d70bfd43e",
+        "rev": "85306ef2470ba705c97ce72741d56e42d0264015",
         "type": "github"
       },
       "original": {

server.go

@@ -1,13 +1,17 @@
 package main
 
 import (
+	"fmt"
+	"github.com/fhs/gompd/v2/mpd"
 	"github.com/labstack/echo-contrib/echoprometheus"
+	"github.com/labstack/echo/v4"
 	"github.com/labstack/echo/v4/middleware"
 	"golang.org/x/net/websocket"
+	"log"
 	"net/http"
+	"strconv"
 	"strings"
-
-	"github.com/labstack/echo/v4"
+	"time"
 )
 
 func main() {
@@ -25,6 +29,7 @@ func main() {
 	e.GET("/metrics", echoprometheus.NewHandler())
 
 	e.GET("/", func(c echo.Context) (err error) {
+		// HTTP/2 Server Push
 		pusher, ok := c.Response().Writer.(http.Pusher)
 		if ok {
 			if err = pusher.Push("/style.css", nil); err != nil {
@@ -40,6 +45,17 @@ func main() {
 		return c.File("index.html")
 	})
 
+	g := e.Group("/api")
+	g.GET("/previous_track", previousTrack)
+	g.GET("/next_track", nextTrack)
+	g.GET("/stop", stopPlayback)
+	g.GET("/play", resumePlayback)
+	g.GET("/pause", pausePlayback)
+	g.GET("/seek/:seconds", seek)
+	g.GET("/repeat", toggleRepeat)
+	g.GET("/random", toggleRandom)
+	g.GET("/volume/:level", setVolume)
+
 	e.GET("/ws", wsServe)
 
 	e.Logger.Fatal(e.StartTLS(":1323", "cert.pem", "key.pem"))
@@ -47,33 +63,217 @@ func main() {
 }
 
 func wsServe(c echo.Context) error {
+	fmt.Println("wsServe")
 	websocket.Handler(func(ws *websocket.Conn) {
 		defer ws.Close()
+		fmt.Println("handler")
 		for {
 			// Read
 			msg := ""
 			err := websocket.Message.Receive(ws, &msg)
 			if err != nil {
 				c.Logger().Error(err)
-			}
-			// Forward MPD communication
+				break
+			} else {
 				if strings.HasPrefix(strings.ToUpper(msg), "MPD#") {
+					// Forward MPD communication
 					// TODO: forward request to mpd and response back to client
 					err := websocket.Message.Send(ws, "MPD command received, processing... processing...")
 					if err != nil {
 						c.Logger().Error(err)
 					}
-			}
+
+				} else if strings.HasPrefix(strings.ToUpper(msg), "YT#") {
 					// Download video link as audio file
-			if strings.HasPrefix(strings.ToUpper(msg), "YT#") {
 					// TODO: implement yt-dlp integration
 					err := websocket.Message.Send(ws, "YT-DLP command received, processing... processing...")
 					if err != nil {
 						c.Logger().Error(err)
 					}
 				}
-			//fmt.Printf("%s\n", msg)
+			}
+			//fmt.Println(msg)
 		}
 	}).ServeHTTP(c.Response(), c.Request())
 	return nil
 }
+
+// API calls
+
+func previousTrack(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	err = conn.Previous()
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}
+
+func nextTrack(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	err = conn.Next()
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}
+
+func stopPlayback(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	err = conn.Stop()
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}
+
+func resumePlayback(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	err = conn.Pause(false)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}
+
+func pausePlayback(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	err = conn.Pause(true)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}
+
+func seek(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	seconds, err := strconv.Atoi(c.Param("seconds"))
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	if seconds < 0 {
+		return c.String(http.StatusBadRequest, "seconds must be positive integer")
+	}
+
+	err = conn.SeekCur(time.Duration(seconds)*time.Second, false)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}
+
+func toggleRepeat(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	status, err := conn.Status()
+	if err != nil {
+		log.Fatalln(err)
+	}
+	if status["repeat"] == "1" {
+		err = conn.Repeat(false)
+	} else {
+		err = conn.Repeat(true)
+	}
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}
+
+func toggleRandom(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	status, err := conn.Status()
+	if err != nil {
+		log.Fatalln(err)
+	}
+	if status["toggleRandom"] == "1" {
+		err = conn.Random(false)
+	} else {
+		err = conn.Random(true)
+	}
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}
+
+func setVolume(c echo.Context) error {
+	// Connect to MPD server
+	conn, err := mpd.Dial("tcp", "localhost:6600")
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer conn.Close()
+
+	level, err := strconv.Atoi(c.Param("level"))
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	if level > 100 || level < 0 {
+		return c.String(http.StatusBadRequest, "Volume must be between 0 and 100")
+	}
+
+	err = conn.SetVolume(level)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return c.String(http.StatusNoContent, "")
+}