132 lines
3.6 KiB
JavaScript
132 lines
3.6 KiB
JavaScript
import path from 'path'
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import rp from 'request-promise-native'
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import crypto from 'crypto'
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import { dbPromise } from './database'
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import { addListExternal } from './external'
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import { parseStringPromise } from 'xml2js'
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const values = require(path.join(process.cwd(), 'values.json'))
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function createHash (data) {
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return crypto
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.createHash('sha1')
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.update(data.artist + data.name)
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.digest('hex')
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.substr(0, 8)
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}
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async function search (track, limit = 30) {
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if (!values.lastfm) return []
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let data
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try {
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data = await rp(`http://ws.audioscrobbler.com/2.0/?method=track.search&track=${track}&api_key=${values.lastfm.key}&format=json&limit=${limit}`)
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data = JSON.parse(data)
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if (!data.results || !data.results.trackmatches || !data.results.trackmatches.track) {
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throw new Error('No results')
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}
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} catch (e) {
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return []
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}
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const final = []
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for (const i in data.results.trackmatches.track) {
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const res = data.results.trackmatches.track[i]
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let clean = {
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id: createHash(res),
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artist: res.artist,
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title: res.name,
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external: true,
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mbid: res.mbid
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}
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clean = addListExternal(clean.id, clean)
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final.push(clean)
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}
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return final
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}
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// Authentication
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function getAPISig (params) {
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let allStrings = []
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const qs = {}
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params.api_key = values.lastfm.key
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for (const key in params) {
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const val = params[key]
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if (val == null || val === '') continue
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allStrings.push(key + val)
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qs[key] = val
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}
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allStrings = allStrings.sort()
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allStrings.push(values.lastfm.secret)
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qs.api_sig = crypto.createHash('md5').update(allStrings.join('')).digest('hex')
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return qs
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}
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function getAuthURL () {
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return 'http://www.last.fm/api/auth/?api_key=' + values.lastfm.key + '&cb=' + values.lastfm.redirectUri
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}
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async function getSession (token) {
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const sessSig = getAPISig({ token, method: 'auth.getSession' })
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const res = await rp('http://ws.audioscrobbler.com/2.0/', { qs: sessSig })
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const rep = await parseStringPromise(res)
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const name = rep.lfm.session[0].name[0]
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const key = rep.lfm.session[0].key[0]
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return { name, key }
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}
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async function storeSession (userId, session) {
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if (!session.name || !session.key) throw new Error('Invalid session parameter.')
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const db = await dbPromise
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const existing = await db.get('SELECT * FROM LastFM WHERE userId = ?', userId)
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if (existing) {
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await db.run('UPDATE LastFM SET name = ?, key = ? WHERE userId = ?', session.name, session.key, userId)
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} else {
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await db.run('INSERT INTO LastFM (userId,name,key,created) VALUES (?,?,?,?)', userId, session.name, session.key, new Date())
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}
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return true
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}
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async function disregardSession (userId) {
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const db = await dbPromise
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return db.run('DELETE FROM LastFM WHERE userId = ?', userId)
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}
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async function getSessionForUser (userId) {
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const db = await dbPromise
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return db.get('SELECT * FROM LastFM WHERE userId = ?', userId)
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}
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async function scrobbleTrack (userId, trackData) {
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const sess = await getSessionForUser(userId)
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if (!sess) throw new Error('User does not have a LastFM session.')
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const scrobbleSig = getAPISig({
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sk: sess.key,
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method: 'track.scrobble',
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artist: trackData.artist || 'Unknown',
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title: trackData.title,
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album: trackData.album,
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duration: trackData.duration,
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mbid: trackData.mbid,
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timestamp: Math.floor(Date.now() / 1000)
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})
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await rp.post('http://ws.audioscrobbler.com/2.0/', { form: scrobbleSig })
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return true
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}
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export {
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search,
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getAPISig,
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getAuthURL,
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getSession,
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getSessionForUser,
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storeSession,
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disregardSession,
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scrobbleTrack
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}
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