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|
package main
import (
"encoding/json"
"strings"
"muhq.space/go/wrms/llog"
"github.com/google/uuid"
"nhooyr.io/websocket"
)
type Song struct {
Title string `json:"title"`
Artist string `json:"artist"`
Source string `json:"source"`
Uri string `json:"uri"`
Weight int `json:"weight"`
index int `json:"-"` // used by heap.Interface
Upvotes map[string]struct{} `json:"-"`
Downvotes map[string]struct{} `json:"-"`
}
func NewSong(title, artist, source, uri string) Song {
return Song{title, artist, source, uri, 0, 0, map[string]struct{}{}, map[string]struct{}{}}
}
func NewSongFromJson(data []byte) (Song, error) {
var s Song
err := json.Unmarshal(data, &s)
if err != nil {
llog.Error("Failed to parse song data %s with %s", string(data), err)
return s, err
}
s.Upvotes = map[string]struct{}{}
s.Downvotes = map[string]struct{}{}
return s, nil
}
type Event struct {
Event string `json:"cmd"`
Songs []Song `json:"songs"`
}
type Connection struct {
Id uuid.UUID
Events chan Event
C *websocket.Conn
}
func (c *Connection) Close() {
llog.Info("Closing connection %s", c.Id)
close(c.Events)
c.C.Close(websocket.StatusNormalClosure, "")
}
type Wrms struct {
Connections []Connection
Songs []Song
queue Playlist
CurrentSong Song
Player Player
Playing bool
Config Config
}
func NewWrms(config Config) *Wrms {
wrms := Wrms{}
wrms.Config = config
wrms.Player = NewPlayer(&wrms, strings.Split(config.Backends, " "))
return &wrms
}
func (wrms *Wrms) Close() {
llog.Info("Closing WRMS")
for _, conn := range wrms.Connections {
conn.Close()
}
}
func (wrms *Wrms) Broadcast(cmd Event) {
llog.Info("Broadcasting %v", cmd)
for i := 0; i < len(wrms.Connections); i++ {
wrms.Connections[i].Events <- cmd
}
}
func (wrms *Wrms) AddSong(song Song) {
wrms.Songs = append(wrms.Songs, song)
s := &wrms.Songs[len(wrms.Songs)-1]
wrms.queue.Add(s)
llog.Info("Added song %s (ptr=%p) to Songs", s.Uri, s)
}
func (wrms *Wrms) Next() {
next := wrms.queue.PopSong()
if next == nil {
wrms.CurrentSong.Uri = ""
return
}
llog.Info("popped next song and removing it from the song list %v", next)
for i, s := range wrms.Songs {
if s.Uri == wrms.CurrentSong.Uri {
wrms.Songs[i] = wrms.Songs[len(wrms.Songs)-1]
wrms.Songs = wrms.Songs[:len(wrms.Songs)-1]
break
}
}
wrms.CurrentSong = *next
}
func (wrms *Wrms) PlayPause() {
var ev Event
if !wrms.Playing {
if wrms.CurrentSong.Uri == "" {
llog.Info("No song currently playing play the next")
wrms.Next()
if wrms.CurrentSong.Uri == "" {
llog.Info("No song left to play")
wrms.Broadcast(Event{"stop", []Song{}})
return
}
}
ev = Event{"play", []Song{wrms.CurrentSong}}
wrms.Player.Play(&wrms.CurrentSong)
} else {
ev = Event{"pause", []Song{}}
wrms.Player.Pause()
}
wrms.Playing = !wrms.Playing
wrms.Broadcast(ev)
}
func (wrms *Wrms) AdjustSongWeight(connId string, songUri string, vote string) {
for i := 0; i < len(wrms.Songs); i++ {
s := &wrms.Songs[i]
if s.Uri != songUri {
continue
}
llog.Info("Adjusting song %s (ptr=%p)", s.Uri, s)
switch vote {
case "up":
if _, ok := s.Upvotes[connId]; ok {
llog.Error("Double upvote of song %s by connections %s", songUri, connId)
return
}
if _, ok := s.Downvotes[connId]; ok {
delete(s.Downvotes, connId)
s.Weight += 2
} else {
s.Weight += 1
}
s.Upvotes[connId] = struct{}{}
case "down":
if _, ok := s.Downvotes[connId]; ok {
llog.Error("Double downvote of song %s by connections %s", songUri, connId)
return
}
if _, ok := s.Upvotes[connId]; ok {
delete(s.Upvotes, connId)
s.Weight -= 2
} else {
s.Weight -= 1
}
s.Downvotes[connId] = struct{}{}
case "unvote":
if _, ok := s.Downvotes[connId]; ok {
delete(s.Downvotes, connId)
s.Weight += 1
}
if _, ok := s.Upvotes[connId]; ok {
delete(s.Upvotes, connId)
s.Weight -= 1
} else {
llog.Error("Double unvote of song %s by connections %s", songUri, connId)
return
}
default:
llog.Fatal("invalid vote")
}
wrms.queue.Adjust(s)
wrms.Broadcast(Event{"update", []Song{*s}})
break
}
}
|
