In handlers made use of a SongList.

internal/http/dj_handlers.go

@@ -2,18 +2,24 @@ package http
 
 import (
 	"dwelling-radio/internal/radio"
+	"dwelling-radio/pkg/oggtag"
 	"encoding/json"
 	"fmt"
 	"log"
 	"net/http"
+	"os"
+	"time"
 )
 
+var songList radio.SongList
+
 type DJHandlers struct {
 	listeners *radio.Listeners
 	playlist  *radio.Playlist
 }
 
-func NewDJHandlers(l *radio.Listeners, p *radio.Playlist) *DJHandlers {
+func NewDJHandlers(l *radio.Listeners, p *radio.Playlist, slLen int) *DJHandlers {
+	songList = *radio.NewSongList(slLen)
 	return &DJHandlers{listeners: l, playlist: p}
 }
 
@@ -24,6 +30,11 @@ func (dj *DJHandlers) ListenersGet(w http.ResponseWriter, _ *http.Request) {
 
 func (dj *DJHandlers) ListenersInc(w http.ResponseWriter, _ *http.Request) {
 	l := dj.listeners.Inc()
+	go func() {
+		if l > songList.Current().MaxListeners {
+			songList.Current().MaxListeners = l
+		}
+	}()
 	w.WriteHeader(http.StatusCreated)
 	w.Header().Add("Content-Type", "text/plain")
 	fmt.Fprint(w, l)
@@ -45,6 +56,24 @@ func (dj *DJHandlers) PlaylistNext(w http.ResponseWriter, _ *http.Request) {
 	nxt := dj.playlist.Next()
 	if nxt == "" {
 		log.Println("the end of a playlist has been reached")
+	} else {
+		go func() {
+			f, err := os.Open(nxt)
+			if err != nil {
+				log.Println("cannot open file \"", nxt, "\" to read tags")
+			}
+
+			buf := make([]byte, 4096)
+			f.Read(buf)
+
+			song := radio.Song_{
+				Artist:       oggtag.OggGetTag(buf, "artist"),
+				Title:        oggtag.OggGetTag(buf, "title"),
+				MaxListeners: dj.listeners.Current(),
+				StartAt:      time.Now()}
+			// radio.CheckAndUpdateMostListenedSong(song, currentSong)
+			songList.Add(song)
+		}()
 	}
 	fmt.Fprint(w, nxt)
 }
@@ -53,10 +82,14 @@ func (dj *DJHandlers) Song(w http.ResponseWriter, r *http.Request) {
 	isList := r.URL.Query().Has("list")
 	w.Header().Add("Content-Type", "application/json")
 	if isList {
-		// TODO
+		err := json.NewEncoder(w).Encode(songList.List())
-		json.NewEncoder(w).Encode("")
+		if err != nil {
+			log.Println("DJHandlers.Song list:", err)
+		}
 	} else {
-		// TODO
+		err := json.NewEncoder(w).Encode(songList.Current())
-		json.NewEncoder(w).Encode("")
+		if err != nil {
+			log.Println("DJHandlers.Song current:", err)
+		}
 	}
 }