277 lines
8 KiB
Go
277 lines
8 KiB
Go
/*
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* MumbleDJ
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* By Matthieu Grieger
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* youtube_dl.go
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* Copyright (c) 2014, 2015 Matthieu Grieger (MIT License)
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*/
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package main
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"net/http"
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"os"
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"os/exec"
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"strconv"
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"strings"
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"time"
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"github.com/jmoiron/jsonq"
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"github.com/layeh/gumble/gumble"
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"github.com/layeh/gumble/gumble_ffmpeg"
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)
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// AudioTrack implements the Song interface
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type AudioTrack struct {
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id string
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title string
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thumbnail string
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submitter *gumble.User
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duration int
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url string
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offset int
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format string
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playlist Playlist
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skippers []string
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dontSkip bool
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service Service
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}
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// AudioPlaylist implements the Playlist interface
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type AudioPlaylist struct {
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id string
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title string
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}
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// ------------
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// YOUTUBEDL SONG
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// ------------
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// Download downloads the song via youtube-dl if it does not already exist on disk.
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// All downloaded songs are stored in ~/.mumbledj/songs and should be automatically cleaned.
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func (dl *AudioTrack) Download() error {
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// Checks to see if song is already downloaded
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if _, err := os.Stat(fmt.Sprintf("%s/.mumbledj/songs/%s", dj.homeDir, dl.Filename())); os.IsNotExist(err) {
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cmd := exec.Command("youtube-dl", "--verbose", "--no-mtime", "--output", fmt.Sprintf("%s/.mumbledj/songs/%s", dj.homeDir, dl.Filename()), "--format", dl.format, "--prefer-ffmpeg", dl.url)
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output, err := cmd.CombinedOutput()
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if err == nil {
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if dj.conf.Cache.Enabled {
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dj.cache.CheckMaximumDirectorySize()
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}
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return nil
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} else {
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args := ""
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for s := range cmd.Args {
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args += cmd.Args[s] + " "
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}
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fmt.Printf(args + "\n" + string(output) + "\n" + "youtube-dl: " + err.Error() + "\n")
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return errors.New("Song download failed.")
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}
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}
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return nil
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}
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// Play plays the song. Once the song is playing, a notification is displayed in a text message that features the song
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// thumbnail, URL, title, duration, and submitter.
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func (dl *AudioTrack) Play() {
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if dl.offset != 0 {
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offsetDuration, _ := time.ParseDuration(fmt.Sprintf("%ds", dl.offset))
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dj.audioStream.Offset = offsetDuration
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}
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dj.audioStream.Source = gumble_ffmpeg.SourceFile(fmt.Sprintf("%s/.mumbledj/songs/%s", dj.homeDir, dl.Filename()))
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if err := dj.audioStream.Play(); err != nil {
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panic(err)
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} else {
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message := `<table><tr><td align="center"><img src="%s" width=150 /></td></tr><tr><td align="center"><b><a href="%s">%s</a> (%s)</b></td></tr><tr><td align="center">Added by %s</td></tr>`
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message = fmt.Sprintf(message, dl.thumbnail, dl.url, dl.title, dl.Duration().String(), dl.submitter.Name)
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if !isNil(dl.playlist) {
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message = fmt.Sprintf(message+`<tr><td align="center">From playlist "%s"</td></tr>`, dl.Playlist().Title())
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}
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dj.client.Self.Channel.Send(message+`</table>`, false)
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go func() {
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dj.audioStream.Wait()
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dj.queue.OnSongFinished()
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}()
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}
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}
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// Delete deletes the song from ~/.mumbledj/songs if the cache is disabled.
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func (dl *AudioTrack) Delete() error {
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if dj.conf.Cache.Enabled == false {
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filePath := fmt.Sprintf("%s/.mumbledj/songs/%s", dj.homeDir, dl.Filename())
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if _, err := os.Stat(filePath); err == nil {
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if err := os.Remove(filePath); err == nil {
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return nil
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}
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return errors.New("Error occurred while deleting audio file.")
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}
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return nil
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}
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return nil
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}
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// AddSkip adds a skip to the skippers slice. If the user is already in the slice, AddSkip
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// returns an error and does not add a duplicate skip.
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func (dl *AudioTrack) AddSkip(username string) error {
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for _, user := range dl.skippers {
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if username == user {
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return errors.New("This user has already skipped the current song.")
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}
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}
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dl.skippers = append(dl.skippers, username)
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return nil
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}
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// RemoveSkip removes a skip from the skippers slice. If username is not in slice, an error is
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// returned.
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func (dl *AudioTrack) RemoveSkip(username string) error {
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for i, user := range dl.skippers {
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if username == user {
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dl.skippers = append(dl.skippers[:i], dl.skippers[i+1:]...)
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return nil
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}
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}
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return errors.New("This user has not skipped the song.")
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}
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// SkipReached calculates the current skip ratio based on the number of users within MumbleDJ's
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// channel and the number of usernames in the skippers slice. If the value is greater than or equal
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// to the skip ratio defined in the config, the function returns true, and returns false otherwise.
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func (dl *AudioTrack) SkipReached(channelUsers int) bool {
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if float32(len(dl.skippers))/float32(channelUsers) >= dj.conf.General.SkipRatio {
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return true
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}
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return false
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}
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// Submitter returns the name of the submitter of the Song.
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func (dl *AudioTrack) Submitter() string {
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return dl.submitter.Name
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}
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// Title returns the title of the Song.
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func (dl *AudioTrack) Title() string {
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return dl.title
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}
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// ID returns the id of the Song.
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func (dl *AudioTrack) ID() string {
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return dl.id
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}
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// Filename returns the filename of the Song.
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func (dl *AudioTrack) Filename() string {
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return dl.id + "." + dl.format
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}
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// Duration returns duration for the Song.
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func (dl *AudioTrack) Duration() time.Duration {
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timeDuration, _ := time.ParseDuration(strconv.Itoa(dl.duration) + "s")
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return timeDuration
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}
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// Thumbnail returns the thumbnail URL for the Song.
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func (dl *AudioTrack) Thumbnail() string {
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return dl.thumbnail
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}
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// Playlist returns the playlist type for the Song (may be nil).
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func (dl *AudioTrack) Playlist() Playlist {
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return dl.playlist
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}
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// DontSkip returns the DontSkip boolean value for the Song.
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func (dl *AudioTrack) DontSkip() bool {
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return dl.dontSkip
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}
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// SetDontSkip sets the DontSkip boolean value for the Song.
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func (dl *AudioTrack) SetDontSkip(value bool) {
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dl.dontSkip = value
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}
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// ----------------
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// YOUTUBEDL PLAYLIST
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// ----------------
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// AddSkip adds a skip to the playlist's skippers slice.
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func (p *AudioPlaylist) AddSkip(username string) error {
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for _, user := range dj.playlistSkips[p.ID()] {
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if username == user {
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return errors.New("This user has already skipped the current song.")
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}
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}
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dj.playlistSkips[p.ID()] = append(dj.playlistSkips[p.ID()], username)
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return nil
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}
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// RemoveSkip removes a skip from the playlist's skippers slice. If username is not in the slice
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// an error is returned.
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func (p *AudioPlaylist) RemoveSkip(username string) error {
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for i, user := range dj.playlistSkips[p.ID()] {
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if username == user {
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dj.playlistSkips[p.ID()] = append(dj.playlistSkips[p.ID()][:i], dj.playlistSkips[p.ID()][i+1:]...)
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return nil
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}
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}
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return errors.New("This user has not skipped the song.")
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}
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// DeleteSkippers removes the skippers entry in dj.playlistSkips.
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func (p *AudioPlaylist) DeleteSkippers() {
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delete(dj.playlistSkips, p.ID())
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}
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// SkipReached calculates the current skip ratio based on the number of users within MumbleDJ's
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// channel and the number of usernames in the skippers slice. If the value is greater than or equal
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// to the skip ratio defined in the config, the function returns true, and returns false otherwise.
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func (p *AudioPlaylist) SkipReached(channelUsers int) bool {
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if float32(len(dj.playlistSkips[p.ID()]))/float32(channelUsers) >= dj.conf.General.PlaylistSkipRatio {
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return true
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}
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return false
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}
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// ID returns the id of the AudioPlaylist.
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func (p *AudioPlaylist) ID() string {
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return p.id
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}
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// Title returns the title of the AudioPlaylist.
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func (p *AudioPlaylist) Title() string {
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return p.title
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}
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// PerformGetRequest does all the grunt work for HTTPS GET request.
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func PerformGetRequest(url string) (*jsonq.JsonQuery, error) {
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jsonString := ""
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if response, err := http.Get(url); err == nil {
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defer response.Body.Close()
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if response.StatusCode == 200 {
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if body, err := ioutil.ReadAll(response.Body); err == nil {
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jsonString = string(body)
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}
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} else {
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if response.StatusCode == 403 {
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return nil, errors.New("Invalid API key supplied.")
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}
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return nil, errors.New("Invalid ID supplied.")
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}
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} else {
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return nil, errors.New("An error occurred while receiving HTTP GET response.")
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}
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jsonData := map[string]interface{}{}
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decoder := json.NewDecoder(strings.NewReader(jsonString))
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decoder.Decode(&jsonData)
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jq := jsonq.NewQuery(jsonData)
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return jq, nil
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}
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