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package main
import (
"encoding/json"
"io/ioutil"
"log"
"net/http"
"strconv"
"time"
)
type Image struct {
Size string `json:"size"`
Href string `json:"#text"`
}
type AlbumInfo struct {
Images []Image `json:"image"`
Mbid string
Name string `json:"title"`
Url string
Position `json:"@attr"`
Artist string
}
type Date struct {
Date string `json:"#text"`
Uts string
}
func (d *Date) ToTime() time.Time {
ts, _ := strconv.Atoi(d.Uts)
return time.Unix(int64(ts), 0)
}
type PageAttrs struct {
TotalPages string
Total string
Page string
User string
}
type ArtistInfo struct {
Name string
Mbid string
Url string
}
type Position struct {
TrackNumber string `json:"position"`
}
type TrackInfo struct {
Name string
Mbid string
Duration string
Artist ArtistInfo
Album AlbumInfo
PlayCount string
Listeners string
}
type LovedTrack struct {
Name string
Mbid string
Url string
Date Date
Artist ArtistInfo
Images []Image
}
type Playing struct {
NowPlaying string
}
type RecentTrack struct {
Name string
Mbid string
Url string
Artist struct {
Name string `json:"#text"`
Mbid string
}
Album struct {
Name string `json:"#text"`
Mbid string
}
Images []Image `json:"image"`
Date Date
Playing `json:"@attr"`
}
func (app *App) LfmQuery(payload map[string]string) []byte {
r, _ := http.NewRequest("GET", "http://ws.audioscrobbler.com/2.0/", nil)
values := r.URL.Query()
values.Add("api_key", app.Config.Lfm.ApiKey)
values.Add("format", "json")
for key, value := range payload {
values.Add(key, value)
}
r.URL.RawQuery = values.Encode()
resp, _ := http.DefaultClient.Do(r)
body, _ := ioutil.ReadAll(resp.Body)
resp.Body.Close()
return body
}
func GetImage(images []Image, size string) string {
for _, image := range images {
if image.Size == size {
return image.Href
}
}
return "https://lastfm-img2.akamaized.net/i/u/64s/4128a6eb29f94943c9d206c08e625904.png"
}
func (app *App) AlbumInfo(artist, album string) AlbumInfo {
r := app.LfmQuery(map[string]string{
"method": "album.getInfo",
"artist": artist,
"album": album,
})
var dst map[string]AlbumInfo
json.Unmarshal(r, &dst)
return dst["album"]
}
func (app *App) TrackInfo(artist, name string) TrackInfo {
r := app.LfmQuery(map[string]string{
"method": "track.getInfo",
"artist": artist,
"track": name,
"autocorrect": "1",
})
var dst map[string]TrackInfo
json.Unmarshal(r, &dst)
return dst["track"]
}
type RecentTracks struct {
dst map[string]struct {
Attrs PageAttrs `json:"@attr"`
Tracks []RecentTrack `json:"track"`
}
payload map[string]string
*App
}
func RecentTrackToScrobble(r *RecentTrack, s *Session) Scrobble {
scrobble := Scrobble{
Artist: NewCorrectable(r.Artist.Name),
Album: NewCorrectable(r.Album.Name),
TrackName: NewCorrectable(r.Name),
Mbid: r.Mbid,
Time: r.Date.ToTime(),
UserId: s.UserId,
SessionKey: s.Key,
Image: GetImage(r.Images, "medium"),
}
return scrobble
}
func NewRecentTracks(name string, from, to time.Time, app *App) *RecentTracks {
rt := &RecentTracks{App: app}
rt.payload = map[string]string{
"method": "user.getRecentTracks",
"limit": "200",
"user": name,
"to": strconv.Itoa(int(to.Unix())),
}
if from.IsZero() {
rt.payload["from"] = "0"
} else {
rt.payload["from"] = strconv.Itoa(int(from.Unix()))
}
return rt
}
func (rt *RecentTracks) Next() []RecentTrack {
r := rt.App.LfmQuery(rt.payload)
json.Unmarshal(r, &rt.dst)
tracks := rt.dst["recenttracks"].Tracks
if len(tracks) > 0 {
d := tracks[len(tracks)-1].Date
if d.Uts != "" && d.Uts != "0" {
rt.payload["to"] = d.Uts
}
}
return tracks
}
func (app *App) ImportRecentTracks(user *User) {
s := &Session{
UserId: user.Id,
Client: "import",
ClientVersion: "",
Key: randomToken(16),
Protocol: "1.2.1",
}
app.PutSession(s)
i := app.NewImport(user.LfmName)
rt := NewRecentTracks(user.LfmName, i.From, i.To, app)
scrobbles := make([]Scrobble, 0, 200)
for tracks := rt.Next(); len(tracks) > 0; tracks = rt.Next() {
scrobbles = scrobbles[:0]
for _, t := range tracks {
if t.NowPlaying == "true" {
continue
}
scrobble := RecentTrackToScrobble(&t, s)
app.GetScrobbleSong(&scrobble)
scrobbles = append(scrobbles, scrobble)
}
if len(scrobbles) == 0 {
break
}
if err := app.PutScrobbles(scrobbles); err != nil {
log.Println(err)
}
i.LastFetch = scrobbles[len(scrobbles)-1].Time
i.Count += len(scrobbles)
if err := app.SaveImport(i); err != nil {
log.Println(err)
}
}
i.Done = true
if err := app.SaveImport(i); err != nil {
log.Println(err)
}
}
func (app *App) LovedTracks(user string) []LovedTrack {
r := app.LfmQuery(map[string]string{
"method": "user.getLovedTracks",
"limit": "100",
"user": user,
})
var dst map[string]struct {
Attrs PageAttrs `json:"@attr"`
Tracks []LovedTrack `json:"track"`
}
json.Unmarshal(r, &dst)
root := dst["lovedtracks"]
tracks := root.Tracks
return tracks
}
func (app *App) GetSong(s *Song) {
if s.Album != "" || s.Mbid != "" {
if app.GetSongId(s) != nil {
if s.Image == "" {
s.Image = GetImage(app.AlbumInfo(s.Artist, s.Album).Images,
"medium")
}
if err := app.InsertSong(s); err != nil {
log.Println(err)
}
}
} else {
t := app.TrackInfo(s.Artist, s.Name)
s.Album = t.Album.Name
s.Mbid = t.Mbid
s.Image = GetImage(t.Album.Images, "medium")
if app.GetSongId(s) != nil {
app.InsertSong(s)
}
}
}
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