Enhance metadata from original sources if possible

lib/services/AVTransport.js

@@ -6,6 +6,7 @@
 
 const Service = require('./Service')
 const Helpers = require('../helpers')
+const enhanceMetadata = require('./EnhanceMetadata')
 
 /**
  * Create a new instance of AVTransport
@@ -196,10 +197,14 @@ class AVTransport extends Service {
           const track = Helpers.ParseDIDL(metadata)
           track.position = position
           track.duration = duration
+          if (trackUri) track.uri = trackUri
+          if (process.env.ENHANCE_METADATA) {
+            const mediaInfo = await this.GetMediaInfo()
+            await enhanceMetadata(track, metadata, mediaInfo)
+          }
           track.albumArtURL = !track.albumArtURI ? null
             : track.albumArtURI.startsWith('http') ? track.albumArtURI
               : 'http://' + this.host + ':' + this.port + track.albumArtURI
-          if (trackUri) track.uri = trackUri
           track.queuePosition = queuePosition
           return track
         } else { // No metadata.

lib/services/ContentDirectory.js

@@ -7,6 +7,7 @@
 
 const Service = require('./Service')
 const Helpers = require('../helpers')
+const enhanceMetadata = require('./EnhanceMetadata')
 
 /**
  * Create a new instance of ContentDirectory
@@ -46,14 +47,20 @@ class ContentDirectory extends Service {
   async GetResult (options) {
     return this.Browse(options)
       .then(this._parseResult)
-      .then(data => {
+      .then(async data => {
         let items = []
         if (data.Result['DIDL-Lite'].container) {
           items = this._enumItems(data.Result['DIDL-Lite'].container)
         } else {
           items = this._enumItems(data.Result['DIDL-Lite'].item)
         }
 
+        if (process.env.ENHANCE_METADATA && items) {
+          for (const item of items) {
+            await enhanceMetadata(item)
+          }
+        }
+
         return {
           returned: data.NumberReturned,
           total: data.TotalMatches,

lib/services/EnhanceMetadata.js

@@ -0,0 +1,78 @@
+const axios = require('axios')
+const jsdom = require('jsdom')
+const Helpers = require('../helpers')
+
+/**
+ * Get a soundcloud client_id
+ * Stolen from https://github.com/3jackdaws/soundcloud-lib
+ */
+class SoundCloudClientId {
+  constructor () {
+    this.clientId = null
+  }
+
+  /**
+   * Get the id
+   * @returns {string} The client_id
+   */
+  async get () {
+    if (this.clientId) return this.clientId
+
+    const dom = await jsdom.JSDOM.fromURL('https://soundcloud.com/mt-marcy/cold-nights')
+    const scripts = dom.window.document.querySelectorAll('script')
+
+    for (const script of scripts) {
+      const src = script.getAttribute('src')
+      if (src) {
+        const scriptSrc = await axios({ url: src, method: 'GET' })
+        if (scriptSrc.status === 200) {
+          const clientIds = scriptSrc.data.match(/client_id=([a-zA-Z0-9]+)/)
+          if (clientIds && clientIds.length > 1) {
+            this.clientId = clientIds[1]
+            break
+          }
+        }
+      }
+    }
+    return this.clientId
+  }
+}
+
+const soundCloudClientId = new SoundCloudClientId()
+
+/**
+ * Enhance metadata with data from original sources
+ *   * Add radio title and album art
+ *   * Add soundcloud album art
+ */
+module.exports = async function enhanceMetadata (track, metadata, mediaInfo) {
+  // Radio
+  if (mediaInfo && mediaInfo.CurrentURI && mediaInfo.CurrentURI.startsWith('x-sonosapi-stream')) {
+    track.albumArtURI = `/getaa?s=1&u=${encodeURIComponent(mediaInfo.CurrentURI)}`
+    if (mediaInfo.CurrentURIMetaData) {
+      const miMetadata = await Helpers.ParseXml(mediaInfo.CurrentURIMetaData)
+      const parsedMediainfo = Helpers.ParseDIDL(miMetadata)
+
+      // For radio set artist = stream title
+      if (!track.artist) track.artist = parsedMediainfo.title
+    }
+  }
+
+  // Soundcloud
+  const uriParts = /x-sonos-http:track%3a(\d+)\.mp3\?sid=160/.exec(track.uri)
+  if (uriParts) {
+    const id = uriParts[1]
+    const clientId = process.env.SOUNDCLOUD_CLIENT_ID || await soundCloudClientId.get()
+    const apiUrl = `http://api-v2.soundcloud.com/tracks/${id}?client_id=${clientId}`
+    try {
+      const res = await axios({ url: apiUrl, method: 'GET' })
+      if (res.status === 200 && res.data && res.data.artwork_url) {
+        track.albumArtURI = res.data.artwork_url.replace('large', 't500x500')
+      }
+    } catch (error) {
+      if (error.response.status === 401) {
+        console.log('Soundcloud crendentials are not valid, api returned 401')
+      }
+    }
+  }
+}