Fix some stuff, start work on remote

package.json

@@ -19,10 +19,12 @@
     "fs-extra": "^7.0.0",
     "socket.io": "^2.1.1",
     "sqlite": "^3.0.0",
-    "sqlite3": "^4.0.3"
+    "sqlite3": "^4.0.3",
+    "ws": "^6.1.3"
   },
   "devDependencies": {
     "babel-core": "^6.26.3",
-    "babel-env": "^2.4.1"
+    "babel-env": "^2.4.1",
+    "morgan": "^1.9.1"
   }
 }

public/index.css

@@ -325,9 +325,19 @@ canvas#visualizer {
     padding: 10px;
     display: flex;
 }
-.sidebar .option.checkbox {
+.sidebar .separator {
+    font-weight: bold;
+    padding: 10px;
+    border-bottom: 2px solid #004561;
+    font-size: 1.2em;
+}
+.sidebar .option.checkbox, .sidebar .option.action {
     flex-direction: row;
 }
+.sidebar .option.action button {
+    flex-grow: 1;
+    margin: 10px;
+}
 .sidebar .option label {
     flex-grow: 1;
 }

public/index.html

@@ -79,14 +79,17 @@
 			<div class="sidebar bar sb-abs">
 				<h2>Options</h2>
 				<div class="sidebar content" id="options">
+					<div class="separator">Playback</div>
 					<div class="option checkbox">
 						<label for="st-autoplay">Automatically play next track</label>
 						<input type="checkbox" id="st-autoplay" name="autoplay">
 					</div>
+					<div class="separator">Search</div>
 					<div class="option checkbox">
 						<label for="st-streamable">Include streamable tracks in searches (experimental)</label>
 						<input type="checkbox" id="st-streamable" name="streamable">
 					</div>
+					<div class="separator">Sorting</div>
 					<div class="option checkbox">
 						<label for="st-trackids" title="Shows track number in album instead when unchecked">Show track IDs</label>
 						<input type="checkbox" id="st-trackids" name="trackids">
@@ -109,6 +112,19 @@
 							<option value="desc">Descending order</option>
 						</select>
 					</div>
+					<div class="separator">Remote Control</div>
+					<div class="option checkbox">
+						<label for="st-remote">Allow remote control</label>
+						<input type="checkbox" id="st-remote" name="remote">
+					</div>
+					<div class="option">
+						<label for="st-device">Device name</label>
+						<input type="text" id="st-device" name="device">
+					</div>
+					<div class="option action">
+						<button id="dc">Take Remote Control</button>
+						<button id="dc-stop">Release Remote</button>
+					</div>
 				</div>
 			</div>
 		</div>

public/index.js

@@ -17,6 +17,7 @@
     <th data-sort-by="year" class="small">Year</th> \
     <th class="small">Duration</th> \
   </tr>'
+
   var nowPlaying = 0
   var externalStream = false
 
@@ -45,6 +46,8 @@
     streamable: true,
     sortby: 'id',
     sortdir: 'asc',
+    device: '',
+    remote: false
   }
 
   window.mobilecheck = function() {

src/lastfm.js

@@ -8,14 +8,17 @@ const values = require(path.join(process.cwd(), 'values.json'))
 let externalTracks = {}
 
 function createHash (data) {
-  return crypto.createHash('sha1').update(data.artist + data.name).digest('hex')
+  return crypto
+    .createHash('sha1')
+    .update(data.artist + data.name)
+    .digest('hex')
     .substr(0, 8)
 }
 
 async function getTrackMetaReal (id) {
   if (!id || !externalTracks[id]) return null
   let trdata = externalTracks[id]
-  if (trdata.file) return trdata
+  if (trdata.file) return Object.assign({}, trdata)
 
   let trsrch = 'ytsearch1:' + trdata.artist + ' - ' + trdata.title
   let dldata = await dl.getVideoInfo(trsrch)
@@ -29,31 +32,45 @@ async function getTrackMetaReal (id) {
     external: true
   }
 
-  return externalTracks[id]
+  return Object.assign({}, externalTracks[id])
 }
 
 async function search (track, limit = 30) {
   if (!values.lastfm) return []
+
   let data
   try {
     data = await as.GET(`http://ws.audioscrobbler.com/2.0/?method=track.search&track=${track}&api_key=${values.lastfm}&format=json&limit=${limit}`)
     data = JSON.parse(data)
+
+    if (!data.results || !data.results.trackmatches || !data.results.trackmatches.track) {
+      throw new Error('No results')
+    }
   } catch (e) {
-    console.warn(e.stack)
     return []
   }
-  if (!data.results || !data.results.trackmatches || !data.results.trackmatches.track) return
+
   let final = []
   for (let i in data.results.trackmatches.track) {
     let res = data.results.trackmatches.track[i]
-    try {
-      let tr = { artist: res.artist, title: res.name, external: true, id: createHash(res) }
-      externalTracks[tr.id] = tr
-      final.push(tr)
-    } catch (e) {
-      continue
+    let clean = {
+      id: createHash(res),
+      artist: res.artist,
+      title: res.name,
+      external: true
     }
+
+    if (externalTracks[clean.id]) {
+      // Copy object
+      clean = Object.assign({}, externalTracks[clean.id])
+    } else {
+      // Save in cache
+      externalTracks[clean.id] = clean
+    }
+
+    final.push(clean)
   }
+
   return final
 }
 

src/remote-control.js

@@ -0,0 +1,75 @@
+import WebSocket from 'ws'
+
+const wss = new WebSocket.Server({ noServer: true })
+
+function getClientByDevice (dev) {
+  for (let i in wss.clients) {
+    let client = wss.clients[i]
+    if (client.device === dev) return client
+  }
+  return null
+}
+
+wss.on('connection', function (ws) {
+  ws.on('device', function (devid) {
+    ws.device = devid
+  })
+
+  ws.on('connect', function (devid) {
+    let target = getClientByDevice(devid)
+    if (!target) return ws.emit('errno', { code: 100, error: 'Target device is not available.' })
+    target.emit('request', ws.device)
+  })
+
+  ws.on('detach', function () {
+    if (!ws.controlled) return
+    ws.controlled = null
+    let target = getClientByDevice(devid)
+    if (!target) return
+    target.controller = null
+    target.emit('detach')
+  })
+
+  ws.on('accept', function (devid) {
+    ws.controller = devid
+    let target = getClientByDevice(devid)
+    if (!target) return ws.emit('errno', { code: 100, error: 'Target device is not available.' })
+    target.controlled = devid
+    target.emit('accepted', devid)
+  })
+
+  ws.on('play', function (id) {
+    if (!ws.controlled) return
+    let target = getClientByDevice(ws.controlled)
+    if (!target) return ws.emit('errno', { code: 100, error: 'Target device is not available.' })
+    target.emit('play', id)
+  })
+
+  ws.on('seekto', function (num) {
+    if (!ws.controlled) return
+    let target = getClientByDevice(ws.controlled)
+    if (!target) return ws.emit('errno', { code: 100, error: 'Target device is not available.' })
+    target.emit('seekto', num)
+  })
+
+  ws.on('volumeto', function (num) {
+    if (!ws.controlled) return
+    let target = getClientByDevice(ws.controlled)
+    if (!target) return ws.emit('errno', { code: 100, error: 'Target device is not available.' })
+    target.emit('volumeto', num)
+  })
+})
+
+module.exports = function (server) {
+  server.on('upgrade', function (request, socket, head) {
+    const pathname = url.parse(request.url).pathname
+
+    if (pathname === '/remote') {
+      wss.handleUpgrade(request, socket, head, function (ws) {
+        wss.emit('connection', ws, request)
+      })
+    } else {
+      socket.destroy()
+    }
+  })
+}

src/server.js

@@ -2,10 +2,12 @@ import path from 'path'
 import sqlite from 'sqlite'
 import Promise from 'bluebird'
 import express from 'express'
+import http from 'http'
 import https from 'https'
 import ffmpeg from 'fluent-ffmpeg'
 
 import lastfm from './lastfm'
+import remote from './remote-control'
 
 require('express-async-errors')
 
@@ -19,6 +21,14 @@ const dbPromise = Promise.resolve()
 const app = express()
 const port = process.env.PORT || 3000
 
+const dev = process.env.NODE_ENV === 'development'
+const server = http.createServer(app)
+
+if (dev) {
+  const morgan = require('morgan')
+  app.use(morgan('dev'))
+}
+
 const router = express.Router()
 
 const sortfields = ['id', 'track', 'artist', 'title', 'album', 'year', 'file']
@@ -123,6 +133,9 @@ router.get('/tracks/search', async (req, res) => {
       let lfm = await lastfm.search(original, llimit)
       if (lfm && lfm.length) {
         tracks = tracks.concat(lfm)
+        count = count + lfm.length
+        if (page == 0) page = 1
+        if (pageCount == 0) pageCount = 1
       }
     } catch (e) {}
   }
@@ -205,6 +218,9 @@ app.use('/', express.static(path.join(process.cwd(), 'public')))
 
 const host = process.env.NODE_ENV === 'development' ? '0.0.0.0' : '127.0.0.1'
 
-app.listen(port, host, function () {
+// Initialize remote control
+remote(server)
+
+server.listen(port, host, function () {
   console.log(`app running on port ${port}`)
 })