Initial Alexa integration

app/Http/Controllers/Api/Web/AlexaController.php

@@ -2,31 +2,71 @@
 
 namespace Poniverse\Ponyfm\Http\Controllers\Api\Web;
 
+use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use Illuminate\Session\Store;
 use Poniverse\Ponyfm\Http\Controllers\Controller;
+use Poniverse\Ponyfm\Models\AlexaSession;
+use Poniverse\Ponyfm\Models\Track;
 use Psr\Log\LoggerInterface;
 
 class AlexaController extends Controller
 {
+    /**
+     * @var AlexaSession
+     */
+    protected $session;
+
     public function handle(Request $request, LoggerInterface $logger)
     {
         $type = $request->json('request.type');
         $intent = $request->json('request.intent.name');
 
+        $sessId = $request->json('session.user.userId', $request->json('context.System.user.userId'));
+
+        if ($sessId) {
+            $this->session = AlexaSession::find($sessId);
+
+            if (!$this->session) {
+                $this->session = new AlexaSession();
+                $this->session->id = $sessId;
+            }
+        }
+
         $logger->debug('Incoming Alexa Request', [
             'type' => $type,
             'intent' => $intent
         ]);
 
-        $logger->debug('Incoming Alexa Full Request', $request->json()->all());
+        $logger->debug('Incoming Alexa Full Request', [
+            'json' => json_encode($request->json()->all(), JSON_PRETTY_PRINT)
+        ]);
+
+        /** @var JsonResponse $response */
+        $response = $this->handleType($request);
+
+        if ($response instanceof JsonResponse) {
+            $logger->debug('Alexa Response', ['json' => $response->getContent()]);
+        }
+
+        if ($this->session) {
+            $this->session->save();
+        }
+
+        return $response;
+    }
+
+    public function handleType(Request $request)
+    {
+        $type = $request->json('request.type');
 
         switch ($type) {
             case 'LaunchRequest':
                 return $this->launch();
             case 'PlayAudio';
                 return $this->play();
-//            case 'AudioPlayer.PlaybackNearlyFinished':
+            case 'AudioPlayer.PlaybackNearlyFinished':
-//                return $this->queueNextTrack();
+                return $this->queueNextTrack();
             case 'IntentRequest':
                 return $this->handleIntent($request);
             default:
@@ -41,8 +81,13 @@ class AlexaController extends Controller
         switch ($intent) {
             case 'AMAZON.PauseIntent':
                 return $this->stop();
+            case 'PlayAudio':
             case 'AMAZON.ResumeIntent':
                 return $this->play();
+            case 'AMAZON.NextIntent':
+                return $this->queueNextTrack(true);
+            case 'AMAZON.PreviousIntent':
+                return $this->previousTrack();
             case 'Author':
                 return $this->author();
             default:
@@ -101,6 +146,11 @@ class AlexaController extends Controller
 
     public function play()
     {
+        $track = array_first(Track::popular(1));
+
+        $this->session->put('current_position', 1);
+        $this->session->put('track_id', $track['id']);
+
         return [
             'version' => '1.0',
             'sessionAttributes' => (object)[],
@@ -111,8 +161,8 @@ class AlexaController extends Controller
                         'playBehavior' => 'REPLACE_ALL',
                         'audioItem' => [
                             'stream' => [
-                                'url' => 'https://pony.fm/t13840/stream.mp3',
+                                'url' => $track['streams']['mp3'],
-                                'token' => 't13840',
+                                'token' => '1',
                                 'offsetInMilliseconds' => 0,
                             ],
                         ],
@@ -123,8 +173,68 @@ class AlexaController extends Controller
         ];
     }
 
-    public function queueNextTrack()
+    public function queueNextTrack($replace = false)
     {
+        $trackId = $this->session->get('track_id');
+        $position = $this->session->get('current_position', 1);
+        $trackHistory = $this->session->get('track_history', []);
+        $playlist = $this->session->get('playlist', []);
+        $playlistNum = $this->session->get('playlist-num', 1);
+
+        if (count($playlist) === 0) {
+            $playlist = Track::popular(30);
+
+            $this->session->put('playlist', $playlist);
+        }
+
+        if ($position === 30) {
+            $playlist = Track::popular(30, false, $playlistNum * 30);
+
+            $position = 1;
+            $playlistNum++;
+        }
+
+        if (count($playlist) === 0) {
+            return [
+                'version' => '1.0',
+                'sessionAttributes' => (object)[],
+                'response' => [
+                    "outputSpeech" => [
+                        "type" => "SSML",
+                        "ssml" => "
+                        <speak>
+                            You've reached the end of the popular tracks today. To start from the beginning say 'Alexa, ask pony fm to play'
+                        </speak>
+                    "],
+                    'directives' => [
+                        [
+                            'type' => 'AudioPlayer.Stop'
+                        ],
+                    ],
+                    'shouldEndSession' => true,
+                ],
+            ];
+        }
+
+        $track = $playlist[$position-1];
+
+        $trackHistory[] = $trackId;
+
+        $this->session->put('current_position', $position + 1);
+        $this->session->put('track_id', $track['id']);
+        $this->session->put('track_history', $trackHistory);
+        $this->session->put('playlist-num', $playlistNum);
+
+        $stream = [
+            'url' => $track['streams']['mp3'],
+            'token' => $track['id'],
+            'offsetInMilliseconds' => 0,
+        ];
+
+        if (!$replace) {
+            $stream['expectedPreviousToken'] = $trackId;
+        }
+
         return [
             'version' => '1.0',
             'sessionAttributes' => (object)[],
@@ -132,14 +242,47 @@ class AlexaController extends Controller
                 'directives' => [
                     [
                         'type' => 'AudioPlayer.Play',
-                        'playBehavior' => 'ENQUEUE',
+                        'playBehavior' => $replace ? 'REPLACE_ALL' : 'ENQUEUE',
                         'audioItem' => [
-                            'stream' => [
+                            'stream' => $stream,
-                                'url' => 'https://pony.fm/t13840/stream.mp3',
+                        ],
-                                'token' => 't13840',
+                    ],
-                                'expectedPreviousToken' => 'fma',
+                ]
-                                'offsetInMilliseconds' => 0,
+            ],
-                            ],
+        ];
+    }
+
+    public function previousTrack()
+    {
+        $trackId = $this->session->get('track_id');
+        $position = $this->session->get('current_position', 1);
+        $trackHistory = $this->session->get('track_history', []);
+        $playlist = $this->session->get('playlist', []);
+
+        $track = $playlist[$position-2];
+
+        $trackHistory[] = $trackId;
+
+        $this->session->put('current_position', $position - 1);
+        $this->session->put('track_id', $track['id']);
+        $this->session->put('track_history', $trackHistory);
+
+        $stream = [
+            'url' => $track['streams']['mp3'],
+            'token' => $track['id'],
+            'offsetInMilliseconds' => 0,
+        ];
+
+        return [
+            'version' => '1.0',
+            'sessionAttributes' => (object)[],
+            'response' => [
+                'directives' => [
+                    [
+                        'type' => 'AudioPlayer.Play',
+                        'playBehavior' => 'REPLACE_ALL',
+                        'audioItem' => [
+                            'stream' => $stream,
                         ],
                     ],
                 ]

app/Models/AlexaSession.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Poniverse\Ponyfm\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class AlexaSession extends Model
+{
+    public $incrementing = false;
+
+    protected $table = 'alexa_session';
+
+    protected $casts = [
+        'payload' => 'array'
+    ];
+
+    public function put($key, $value)
+    {
+        $payload = $this->payload;
+
+        $payload[$key] = $value;
+
+        $this->payload = $payload;
+    }
+
+    public function get($key, $default = null)
+    {
+        return $this->payload[$key] ?? $default;
+    }
+}

app/Models/Track.php

@@ -287,12 +287,12 @@ class Track extends Model implements Searchable, Commentable, Favouritable
      * @param integer $count
      * @return array
      */
-    public static function popular($count, $allowExplicit = false)
+    public static function popular($count, $allowExplicit = false, $skip = 0)
     {
         $trackIds = Cache::remember(
             'popular_tracks'.$count.'-'.($allowExplicit ? 'explicit' : 'safe'),
             5,
-            function () use ($allowExplicit, $count) {
+            function () use ($allowExplicit, $count, $skip) {
                 $query = static
                     ::published()
                     ->listed()
@@ -308,6 +308,7 @@ class Track extends Model implements Searchable, Commentable, Favouritable
                     )
                     ->groupBy(['id', 'track_id'])
                     ->orderBy('plays', 'desc')
+                    ->skip($skip)
                     ->take($count);
 
                 if (!$allowExplicit) {
@@ -455,7 +456,7 @@ class Track extends Model implements Searchable, Commentable, Favouritable
                 'original' => $track->getCoverUrl(Image::ORIGINAL)
             ],
             'streams' => [
-                'mp3' => $track->getStreamUrl('MP3'),
+                'mp3' => str_replace('http://adamlav.in', 'https://pony.fm', str_replace('http://ponyfm-dev.poni','https://pony.fm', $track->getStreamUrl('MP3'))),
                 'aac' => (!Config::get('app.debug') || is_file($track->getFileFor('AAC'))) ? $track->getStreamUrl('AAC') : null,
                 'ogg' => (Config::get('app.debug') || is_file($track->getFileFor('OGG Vorbis'))) ? $track->getStreamUrl('OGG Vorbis') : null
             ],

database/migrations/2016_09_30_202330_create_alexa_session.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateAlexaSession extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('alexa_session', function(Blueprint $table)
+        {
+            $table->string('id')->unique();
+            $table->text('payload');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::drop('alexa_session');
+    }
+}