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lastfm.go
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lastfm.go
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package lastfm
import (
"bytes"
"net/http"
"sync"
"fmt"
"encoding/json"
"os"
"io/ioutil"
"github.com/Krognol/dgofw"
"github.com/bwmarrin/discordgo"
)
type LastfmPlugin struct {
sync.RWMutex
APIKey string `json:"api_key"`
CachedUsers map[string]string `json:"cached_users"`
}
const collageURL = "http://lastfmtopalbums.dinduks.com/patchwork.php?period=7day&rows=4&cols=4&imageSize=250&user=%s"
type Recent struct {
RecentTracks struct {
Track []struct {
Artist struct {
Text string `json:"#text"`
MbID string `json:"mbid"`
} `json:"artist"`
Name string `json:"name"`
Streamable string `json:"streamable"`
MbID string `json:"mbid"`
Album struct {
Text string `json:"#text"`
MbID string `json:"mbid"`
} `json:"album"`
URL string `json:"url"`
Image []struct {
Text string `json:"#text"`
Size string `json:"size"`
} `json:"image"`
Attr struct {
NowPlaying string `json:"nowplaying"`
} `json:"@attr,omitempty"`
Date struct {
Uts string `json:"uts"`
Text string `json:"#text"`
} `json:"date,omitempty"`
} `json:"track"`
Attr struct {
User string `json:"user"`
Page string `json:"page"`
PerPage string `json:"perPage"`
TotalPages string `json:"totalPages"`
Total string `json:"total"`
} `json:"@attr"`
} `json:"recenttracks"`
}
func NewLastFMClient(apikey string) *LastfmPlugin {
plugin := &LastfmPlugin{
APIKey: apikey,
CachedUsers: make(map[string]string),
}
err := plugin.Load()
if err != nil {
fmt.Println(err.Error())
plugin.APIKey = apikey
plugin.CachedUsers = make(map[string]string)
plugin.Save()
}
return plugin
}
func (l *LastfmPlugin) request(method, user, span string, limit int) (*http.Response, error) {
url := fmt.Sprintf("https://ws.audioscrobbler.com/2.0/?method=%s&format=json&user=%s&api_key=%s",
method,
user,
l.APIKey,
)
if span != "" {
url += "&period=" + span
}
if limit != 0 {
url += fmt.Sprintf("&limit=%d", limit)
}
req, _ := http.NewRequest("GET", url, nil)
return http.DefaultClient.Do(req)
}
var LfmHelp = []string{
"fm set [name] -- Sets a last.fm username in the local cache",
"fm now -- Looks up last.fm users currently playing track. \n\t\t\t\t If no username is given takes from local cache",
"fm recent -- Gets the users last 5 played songs.",
"fm collage -- Gets a 4x4 collage of the users top played albums the last 7 days",
"fm top weekly -- Weekly top tracks for the user",
"fm top tracks -- All time top tracks for the user",
"fm top albums -- All time top albums for the user",
"fm top artists -- All time top artists for the user",
}
func unmarshal(b *http.Response, v interface{}) error {
defer b.Body.Close()
return json.NewDecoder(b.Body).Decode(v)
}
func (l *LastfmPlugin) fmNow(m *dgofw.DiscordMessage, u string) {
res, err := l.request("user.getrecenttracks", u, "", 1)
if err != nil {
m.Reply("Something happened...")
return
}
var recent Recent
err = unmarshal(res, &recent)
if err != nil || len(recent.RecentTracks.Track) == 0 {
m.Reply("Something happened...")
return
}
track := recent.RecentTracks.Track[0]
if track.Attr.NowPlaying == "" {
m.Reply("Looks like you're not scrobbling a track right now")
return
}
embed := &discordgo.MessageEmbed{
Author: &discordgo.MessageEmbedAuthor{
Name: recent.RecentTracks.Attr.User,
URL: "https://last.fm/user/" + recent.RecentTracks.Attr.User,
IconURL: m.Author.Avatar(),
},
Title: fmt.Sprintf("%s -- %s", track.Name, track.Artist.Text),
URL: track.URL,
Color: m.Session().State.UserColor(m.Author.ID(), m.ChannelID()),
}
if track.Image[3].Text != "" {
embed.Image = &discordgo.MessageEmbedImage{
URL: track.Image[3].Text,
}
}
m.ReplyEmbed(embed)
}
func (l *LastfmPlugin) fmRecent(m *dgofw.DiscordMessage, u string) {
res, err := l.request("user.getrecenttracks", u, "", 11)
if err != nil {
return
}
var recent Recent
if err = unmarshal(res, &recent); err != nil {
m.Reply("Something happened...")
return
}
tracks := recent.RecentTracks.Track
embed := &discordgo.MessageEmbed{
Color: m.Session().State.UserColor(m.Author.ID(), m.ChannelID()),
Description: "",
Author: &discordgo.MessageEmbedAuthor{
URL: "https://last.fm/user/" + u,
IconURL: m.Author.Avatar(),
Name: u,
},
}
var imgi int
if tracks[0].Attr.NowPlaying != "" {
imgi = 1
} else {
imgi = 0
}
var buf bytes.Buffer
for i, track := range tracks[imgi:] {
artist := track.Artist.Text
song := track.Name
url := track.URL
if i == 9 {
buf.WriteString(fmt.Sprintf("`%d`\t **[%s](%s)** by **%s**\n", (i + 1), song, url, artist))
break
}
buf.WriteString(fmt.Sprintf("`%d`\t **[%s](%s)** by **%s**\n", (i + 1), song, url, artist))
}
embed.Description = buf.String()
if tracks[imgi].Image[3].Text == "" {
embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
URL: "http://i.imgur.com/jzZ5llc.png",
}
} else {
embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
URL: tracks[imgi].Image[3].Text,
}
}
m.ReplyEmbed(embed)
}
type Top struct {
TopTracks struct {
Track []struct {
Artist struct {
Name string `json:"name"`
URL string `json:"url"`
} `json:"artist"`
Name string `json:"name"`
URL string `json:"url"`
Playcount string `json:"playcount"`
Image []struct {
URL string `json:"#text"`
} `json:"image"`
} `json:"track"`
} `json:"toptracks"`
}
func (l *LastfmPlugin) fmTopTracks(m *dgofw.DiscordMessage, u, span string) {
res, err := l.request("user.gettoptracks", u, span, 10)
if err != nil {
fmt.Println(err)
return
}
var tops Top
err = unmarshal(res, &tops)
if err != nil {
fmt.Println(err)
return
}
embed := &discordgo.MessageEmbed{
Color: m.Session().State.UserColor(m.Author.ID(), m.ChannelID()),
Author: &discordgo.MessageEmbedAuthor{
Name: u + "'s Weekly Top 10",
IconURL: m.Author.Avatar(),
URL: "https://last.fm/user/" + u,
},
Description: "",
}
var buf bytes.Buffer
for i, track := range tops.TopTracks.Track {
artist := track.Artist.Name
song := track.Name
songURL := track.URL
if i == 9 {
buf.WriteString(fmt.Sprintf("`%d`\t **[%s](%s)** by **%s** (%s plays)\n", (i + 1), song, songURL, artist, track.Playcount))
} else {
buf.WriteString(fmt.Sprintf("`%d`\t **[%s](%s)** by **%s** (%s plays)\n", (i + 1), song, songURL, artist, track.Playcount))
}
}
embed.Description = buf.String()
if tops.TopTracks.Track[0].Image[3].URL == "" {
embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
URL: "http://i.imgur.com/jzZ5llc.png",
}
} else {
embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
URL: tops.TopTracks.Track[0].Image[3].URL,
}
}
m.ReplyEmbed(embed)
}
type TopAlbum struct {
TopAlbums struct {
Album []struct {
Name string `json:"name"`
Playcount string `json:"playcount"`
URL string `json:"url"`
Artist struct {
Name string `json:"name"`
URL string `json:"url"`
} `json:"url"`
Image []struct {
URL string `json:"#text"`
}
} `json:"album"`
} `json:"topalbums"`
}
func (l *LastfmPlugin) fmTopAlbums(m *dgofw.DiscordMessage, u string) {
res, err := l.request("user.gettopalbums", u, "", 10)
if err != nil {
return
}
var tops TopAlbum
err = unmarshal(res, &tops)
if err != nil {
return
}
embed := &discordgo.MessageEmbed{
Color: m.Session().State.UserColor(m.Author.ID(), m.ChannelID()),
Author: &discordgo.MessageEmbedAuthor{
Name: u + "'s Top Albums",
IconURL: m.Author.Avatar(),
URL: "https://last.fm/user/" + u,
},
Description: "",
}
var buf bytes.Buffer
for i, album := range tops.TopAlbums.Album {
name := album.Name
plays := album.Playcount
url := album.URL
artist := album.Artist.Name
artistURL := album.Artist.URL
if i == 9 {
buf.WriteString(fmt.Sprintf("`%d`\t **[%s](%s)** by **[%s](%s)** (%s plays)\n", (i + 1), name, url, artist, artistURL, plays))
} else {
buf.WriteString(fmt.Sprintf("`%d`\t **[%s](%s)** by **[%s](%s)** (%s plays)\n", (i + 1), name, url, artist, artistURL, plays))
}
}
embed.Description = buf.String()
if tops.TopAlbums.Album[0].Image[3].URL == "" {
embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
URL: "http://i.imgur.com/jzZ5llc.png",
}
} else {
embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
URL: tops.TopAlbums.Album[0].Image[3].URL,
}
}
m.ReplyEmbed(embed)
}
type TopArtist struct {
TopArtists struct {
Artist []struct {
Name string `json:"name"`
Playcount string `json:"playcount"`
URL string `json:"url"`
Image []struct {
URL string `json:"#text"`
} `json:"image"`
} `json:"artist"`
} `json:"topartists"`
}
func (l *LastfmPlugin) fmTopArtists(m *dgofw.DiscordMessage, u string) {
res, err := l.request("user.gettopartists", u, "", 10)
if err != nil {
return
}
var tops TopArtist
err = unmarshal(res, &tops)
if err != nil {
return
}
embed := &discordgo.MessageEmbed{
Color: m.Session().State.UserColor(m.Author.ID(), m.ChannelID()),
Author: &discordgo.MessageEmbedAuthor{
Name: u + "'s Top Artists",
URL: "https://last.fm/user" + u,
IconURL: m.Author.Avatar(),
},
Description: "",
}
var buf bytes.Buffer
for i, artist := range tops.TopArtists.Artist {
if i == 9 {
buf.WriteString(fmt.Sprintf("`%d`\t **[%s](%s)**(%s plays)\n", (i + 1), artist.Name, artist.URL, artist.Playcount))
} else {
buf.WriteString(fmt.Sprintf("`%d`\t **[%s](%s)**(%s plays)\n", (i + 1), artist.Name, artist.URL, artist.Playcount))
}
}
embed.Description = buf.String()
if tops.TopArtists.Artist[0].Image[3].URL == "" {
embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
URL: "http://i.imgur.com/jzZ5llc.png",
}
} else {
embed.Thumbnail = &discordgo.MessageEmbedThumbnail{
URL: tops.TopArtists.Artist[0].Image[3].URL,
}
}
m.ReplyEmbed(embed)
}
func (l *LastfmPlugin) OnMessage(m *dgofw.DiscordMessage) {
arg1 := m.Arg("arg1")
if arg1 == "set" {
if arg2 := m.Arg("arg2"); arg2 != "" {
l.CachedUsers[m.Author.ID()] = arg2
l.Save()
m.Reply("Set Last.FM username for '" + m.Author.Mention() + "' to " + arg2)
}
return
}
u, ok := l.CachedUsers[m.Author.ID()]
if !ok {
m.Reply("You don't have a Last.FM username set!\nYou can set it with `fm set [username]`")
return
}
switch arg1 {
case "now":
l.fmNow(m, u)
case "recent":
l.fmRecent(m, u)
case "collage":
res, err := http.Get(fmt.Sprintf(collageURL, u))
if err != nil {
m.Reply("Couldn't get collage :(")
return
}
m.ReplyFileWithMessage(m.Author.Mention(), u+"_lfm_collage_250x250_4x4.png", res.Body)
case "top":
arg2 := m.Arg("arg2")
switch arg2 {
case "weekly":
l.fmTopTracks(m, u, "7day")
case "tracks":
l.fmTopTracks(m, u, "")
case "albums":
l.fmTopAlbums(m, u)
case "artists":
l.fmTopArtists(m, u)
}
}
}
func (p *LastfmPlugin) Save() (err error) {
var f *os.File
if f, err = os.Create("./lastfmstate.json"); err == nil {
defer f.Close()
return json.NewEncoder(f).Encode(p)
}
return
}
func (p *LastfmPlugin) Load() (err error) {
var b []byte
if b, err = ioutil.ReadFile("./lastfmstate.json"); err == nil {
return json.Unmarshal(b, p)
}
return
}