137 lines
3.6 KiB
Go
137 lines
3.6 KiB
Go
package http
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import (
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"dwelling-radio/internal/radio"
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"dwelling-radio/internal/statistics"
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"dwelling-radio/pkg/oggtag"
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"strings"
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"time"
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)
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type DJHandlers struct {
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listeners *radio.ListenerCounter
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playlist *radio.Playlist
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stats statistics.Statistics
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curSong *radio.Song
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listLen int64
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fallbackSong string
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}
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func NewDJHandlers(l *radio.ListenerCounter, p *radio.Playlist,
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stats statistics.Statistics, cs *radio.Song, n int64, fS string) *DJHandlers {
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return &DJHandlers{listeners: l, playlist: p,
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stats: stats, curSong: cs, listLen: n, fallbackSong: fS}
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}
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func (dj *DJHandlers) ListenersUpdate(w http.ResponseWriter, r *http.Request) {
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defer func() {
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if err := recover(); err != nil {
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log.Println("DJHandlers.ListenersUpdate panic:", err)
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}
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}()
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if err := r.ParseForm(); err != nil {
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log.Println("DJHandlers.ListenersUpdate:", err)
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http.Error(w, "cannot parse form", http.StatusBadRequest)
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return
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}
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switch r.FormValue("action") {
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case "listener_add":
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l := dj.listeners.Inc()
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go func() {
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dj.curSong.UpdateMaxListeners(l)
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dj.curSong.IncListeners()
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}()
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case "listener_remove":
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if _, err := dj.listeners.Dec(); err != nil {
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log.Println("DJHandlers.ListenersUpdate:", err)
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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default:
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w.WriteHeader(http.StatusNotAcceptable)
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return
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}
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w.Header().Add("Content-Type", "text/plain")
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w.Header().Add("Icecast-Auth-User", "1")
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w.WriteHeader(http.StatusOK)
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}
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func (dj *DJHandlers) PlaylistNext(w http.ResponseWriter, _ *http.Request) {
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w.Header().Add("Content-Type", "text/plain")
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nxt := dj.playlist.Next()
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if nxt == "" {
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log.Println("the end of a playlist has been reached")
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if nxt = dj.fallbackSong; nxt == "" {
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log.Println("a fallback song is not set")
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http.Error(w, "a playlist is empty and a fallback song is not set", http.StatusNotFound)
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return
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}
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}
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go func() {
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oggf, err := oggtag.NewOggFile(nxt)
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if err != nil {
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log.Println("cannot read an OGG file", nxt, ":", err)
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return
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}
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newSong := radio.Song{
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Artist: oggf.GetTag("artist"),
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Title: oggf.GetTag("title"),
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Duration: oggf.GetDuration(),
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Listeners: dj.listeners.Current(),
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MaxListeners: dj.listeners.Current(),
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// Here 5 seconds are being added because it is approximately the
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// time between the creation of this Song object and when ezstream
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// actually starts to play it.
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StartAt: time.Now().Add(5 * time.Second)}
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if newSong.Artist == "" || newSong.Title == "" {
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log.Println("Playlist:", nxt, "has no artist or title tags.")
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}
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if strings.HasSuffix(nxt, "/fallback.ogg") {
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newSong.Artist = "Nothing to play. Playing a fallback: " + newSong.Artist
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}
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if dj.curSong.Artist != "" {
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if err := dj.stats.Add(dj.curSong); err != nil {
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log.Println("cannot add a song to a stats DB:", err)
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}
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}
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dj.curSong.SetFrom(&newSong)
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}()
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fmt.Fprintln(w, nxt)
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}
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func (dj *DJHandlers) Status(w http.ResponseWriter, r *http.Request) {
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w.Header().Add("Content-Type", "application/json")
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lst, err := dj.stats.LastNSongs(dj.listLen)
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if err != nil {
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log.Println("failed to fetch last n songs:", err)
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}
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err = json.NewEncoder(w).Encode(&struct {
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Current *radio.Song `json:"current_song,omitempty"`
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Listeners *radio.ListenerCounter `json:"listeners"`
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List []radio.Song `json:"last_songs,omitempty"`
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}{
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Current: dj.curSong,
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Listeners: dj.listeners,
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List: lst})
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if err != nil {
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log.Println("DJHandlers.Status:", err)
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http.Error(w, "status parsing failed", http.StatusInternalServerError)
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}
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}
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