add alexa support

probably rough around the edges still

composer.json

@@ -8,7 +8,8 @@
     "indieauth/client": "0.1.*",
     "mpratt/relativetime": ">=1.0",
     "firebase/php-jwt": "^4.0",
-    "p3k/multipart": "*"
+    "p3k/multipart": "*",
+    "minicodemonkey/amazon-alexa-php": "^0.1.5"
   },
   "autoload": {
     "files": [

composer.lock

@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "c399b5d1b32e020f809404e3bfa32275",
-    "content-hash": "63122eac6f996b58bc73ed1359b12099",
+    "hash": "ebaa6e4aed4c7cfa5a835cbe2b92e629",
+    "content-hash": "4b3b194b582b716faa00f4da8ce8859b",
     "packages": [
         {
             "name": "barnabywalters/mf-cleaner",
@@ -329,6 +329,45 @@
             ],
             "time": "2015-07-12 14:10:01"
         },
+        {
+            "name": "minicodemonkey/amazon-alexa-php",
+            "version": "0.1.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/MiniCodeMonkey/amazon-alexa-php.git",
+                "reference": "006a1e1e775d8429574cde1a093a8b9a4da6a960"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/MiniCodeMonkey/amazon-alexa-php/zipball/006a1e1e775d8429574cde1a093a8b9a4da6a960",
+                "reference": "006a1e1e775d8429574cde1a093a8b9a4da6a960",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.6"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Alexa\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mathias Hansen",
+                    "email": "me@codemonkey.io"
+                }
+            ],
+            "description": "Amazon Alexa interface for PHP",
+            "time": "2015-11-29 21:50:59"
+        },
         {
             "name": "mpratt/relativetime",
             "version": "1.5.4",

controllers/alexa.php

@@ -0,0 +1,257 @@
+<?php
+use \Firebase\JWT\JWT;
+
+$app->get('/alexa', function() use($app) {
+  render('alexa', array(
+    'title' => 'Teacup for Alexa'
+  ));
+});
+
+$app->get('/alexa/auth', function() use($app) {
+  $req = $app->request();
+  $params = $req->params();
+
+  $required = ['client_id', 'response_type', 'state', 'redirect_uri'];
+  $params_present = array_keys($params);
+
+  // Validate Alexa OAuth parameters
+  if(count(array_intersect($required, $params_present)) != count($required)) {
+    render('auth_error', array(
+      'title' => 'Sign In',
+      'error' => 'Missing parameters',
+      'errorDescription' => 'One or more required parameters were missing',
+      'footer' => false
+    ));
+    return;
+  }
+
+  // Check that redirect URI is one that is allowed
+  if(!in_array($params['redirect_uri'], Config::$alexaRedirectURIs)) {
+    render('auth_error', array(
+      'title' => 'Sign In',
+      'error' => 'Invalid redirect URI',
+      'errorDescription' => 'Alexa sent an invalid redirect URI',
+      'footer' => false
+    ));
+    return;
+  }
+
+  if($params['client_id'] != Config::$alexaClientID) {
+    render('auth_error', array(
+      'title' => 'Sign In',
+      'error' => 'Invalid Client ID',
+      'errorDescription' => 'Alexa sent an invalid client ID',
+      'footer' => false
+    ));
+    return;
+  }
+
+  // Pass through the OAuth parameters
+  render('alexa-auth', [
+    'title' => 'Teacup for Alexa',
+    'client_id' => $params['client_id'],
+    'response_type' => $params['response_type'],
+    'state' => $params['state'],
+    'redirect_uri' => $params['redirect_uri'],
+    'footer' => false
+  ]);
+});
+
+$app->post('/alexa/login', function() use($app) {
+  $req = $app->request();
+  $params = $req->params();
+
+  file_put_contents('logs/login.txt', json_encode($params));
+
+  $required = ['code', 'client_id', 'state', 'redirect_uri'];
+  $params_present = array_keys($params);
+
+  if(count(array_intersect($required, $params_present)) != count($required)) {
+    render('auth_error', array(
+      'title' => 'Sign In',
+      'error' => 'Missing parameters',
+      'errorDescription' => 'One or more required parameters were missing',
+      'footer' => false
+    ));
+    return;
+  }
+
+  $user = ORM::for_table('users')
+    ->where('device_code', $params['code'])
+    ->where_gt('device_code_expires', date('Y-m-d H:i:s'))->find_one();
+
+  if(!$user) {
+    render('auth_error', array(
+      'title' => 'Sign In',
+      'error' => 'Invalid code',
+      'errorDescription' => 'The code you entered is invalid or has expired',
+      'footer' => false
+    ));
+    return;
+  }
+
+  $code = JWT::encode(array(
+    'user_id' => $user->id,
+    'iat' => time(),
+    'exp' => time()+300,
+    'client_id' => $params['client_id'],
+    'state' => $params['state'],
+    'redirect_uri' => $params['redirect_uri'],
+  ), Config::$jwtSecret);
+
+  $redirect = $params['redirect_uri'] . '?code=' . $code . '&state=' . $params['state'];
+
+  $app->redirect($redirect, 302);
+});
+
+$app->post('/alexa/token', function() use($app) {
+  $req = $app->request();
+  $params = $req->params();
+  // Alexa requests a token given a code generated above
+
+  // Verify the client ID and secret
+  if($params['client_id'] != Config::$alexaClientID 
+    || $params['client_secret'] != Config::$alexaClientSecret) {
+    $app->response->setStatus(400);
+    $app->response()['Content-type'] = 'application/json';
+    $app->response()->body(json_encode([
+      'error' => 'forbidden',
+      'error_description' => 'The client ID and secret do not match'
+    ]));
+    return;
+  }
+
+  if(array_key_exists('code', $params)) {
+    $jwt = $params['code'];
+  } elseif(array_key_exists('refresh_token', $params)) {
+    $jwt = $params['refresh_token'];
+  } else {
+    $app->response->setStatus(400);
+    $app->response()['Content-type'] = 'application/json';
+    $app->response()->body(json_encode([
+      'error' => 'bad_request',
+      'error_description' => 'Must provide either an authorization code or refresh token'
+    ]));
+    return;
+  }
+
+  // Validate the JWT
+  try {
+    $user = JWT::decode($jwt, Config::$jwtSecret, ['HS256']);
+  } catch(Exception $e) {
+    $app->response->setStatus(400);
+    $app->response()['Content-type'] = 'application/json';
+    $app->response()->body(json_encode([
+      'error' => 'unauthorized',
+      'error_description' => 'The authorization code or refresh token was invalid'
+    ]));
+    return;
+  }
+
+  // Generate an access token and refresh token
+  $access_token = JWT::encode([
+    'user_id' => $user->user_id,
+    'client_id' => $user->client_id,
+    'iat' => time(),
+  ], Config::$jwtSecret);
+  $refresh_token = JWT::encode([
+    'user_id' => $user->user_id,
+    'client_id' => $user->client_id,
+    'iat' => time(),
+  ], Config::$jwtSecret);
+
+
+  $app->response()['Content-type'] = 'application/json';
+  $app->response()->body(json_encode([
+    'access_token' => $access_token,
+    'refresh_token' => $refresh_token
+  ]));
+});
+
+
+$app->post('/alexa/endpoint', function() use($app) {
+
+  $input = file_get_contents('php://input');
+  $json = json_decode($input, 'input');
+
+  $alexaRequest = \Alexa\Request\Request::fromData($json);
+
+  if($alexaRequest instanceof Alexa\Request\IntentRequest) {
+    # file_put_contents('logs/request.txt', $input);
+
+    # Verify the access token
+    try {
+      $data = JWT::decode($alexaRequest->user->accessToken, Config::$jwtSecret, ['HS256']);
+    } catch(Exception $e) {
+      $app->response->setStatus(401);
+      $app->response()['Content-type'] = 'application/json';
+      $app->response()->body(json_encode([
+        'error' => 'unauthorized',
+        'error_description' => 'The access token was invalid or has expired'
+      ]));
+      return;
+    }
+
+    $user = ORM::for_table('users')->find_one($data->user_id);
+
+    if(!$user) {
+      $app->response->setStatus(400);
+      return;
+    }
+
+    $action = $alexaRequest->slots['Action'];
+    $food = ucfirst($alexaRequest->slots['Food']);
+
+
+    $entry = ORM::for_table('entries')->create();
+    $entry->user_id = $user->id;
+    $entry->type = ($action == 'drank' ? 'drink' : 'eat');
+    $entry->content = $food;
+    $entry->published = date('Y-m-d H:i:s');
+    $entry->save();
+
+    $text_content = 'Just ' . $action . ': ' . $food;
+
+    if($user->micropub_endpoint) {
+      $mp_request = array(
+        'h' => 'entry',
+        'published' => date('Y-m-d H:i:s'),
+        'summary' => $text_content
+      );
+      if($user->enable_array_micropub) {
+        $mp_request[$action] = [
+          'type' => 'h-food',
+          'properties' => [
+            'name' => $food
+          ]
+        ];
+      } else {
+        $mp_request['p3k-food'] = $food;
+        $mp_request['p3k-type'] = $entry->type;
+      }
+
+      $r = micropub_post($user->micropub_endpoint, $mp_request, $user->access_token);
+      $request = $r['request'];
+      $response = $r['response'];
+
+      $entry->micropub_response = $response;
+      if($response && preg_match('/Location: (.+)/', $response, $match)) {
+        $url = $match[1];
+        $entry->micropub_success = 1;
+        $entry->canonical_url = $url;
+      } else {
+        $entry->micropub_success = 0;
+        $url = Config::$base_url . $user->url . '/' . $entry->id;
+      }
+      $entry->save();
+    }
+
+
+    $response = new \Alexa\Response\Response;
+    $response->respond('Got it!')
+      ->withCard('You '.$action.': '.$food);
+
+    $app->response()['Content-type'] = 'application/json';
+    $app->response()->body(json_encode($response->render()));
+  }
+});

controllers/controllers.php

@@ -76,8 +76,24 @@ $app->get('/new', function() use($app) {
 
 $app->get('/settings', function() use($app) {
   if($user=require_login($app)) {
-    $html =     
-    $app->response()->body($html);
+    render('settings', [
+      'title' => 'Settings',
+    ]);
+  }
+});
+
+$app->post('/settings/device-code', function() use($app) {
+  if($user=require_login($app)) {
+    $code = mt_rand(100000,999999);
+
+    $user->device_code = $code;
+    $user->device_code_expires = date('Y-m-d H:i:s', time()+300);
+    $user->save();
+
+    $app->response()['Content-Type'] = 'application/json';
+    $app->response()->body(json_encode([
+      'code' => $code
+    ]));
   }
 });
 
@@ -111,6 +127,10 @@ $app->get('/docs', function() use($app) {
   render('docs', array('title' => 'Documentation'));
 });
 
+$app->get('/privacy', function() use($app) {
+  render('privacy', array('title' => 'Privacy Policy'));
+});
+
 $app->get('/add-to-home', function() use($app) {
   $params = $app->request()->params();
   header("Cache-Control: no-cache, must-revalidate");

lib/config.template.php

@@ -12,5 +12,12 @@ class Config {
   public static $jwtSecret = 'xxx';
 
   public static $mf2Debug = false;
+
+  public static $alexaClientID = '';
+  public static $alexaClientSecret = '';
+  public static $alexaRedirectURIs = [
+    '',
+    ''
+  ];
 }
 

public/index.php

@@ -14,6 +14,7 @@ $app = new \Slim\Slim(array(
 require 'controllers/auth.php';
 require 'controllers/controllers.php';
 require 'controllers/pebble.php';
+require 'controllers/alexa.php';
 
 session_name('teacup');
 session_set_cookie_params(86400*30);

schema/migrations/0002.sql

@@ -0,0 +1,3 @@
+ALTER TABLE users
+ADD COLUMN `device_code` varchar(10) DEFAULT NULL,
+ADD COLUMN `device_code_expires` datetime DEFAULT NULL;

schema/schema.sql

@@ -16,6 +16,8 @@ CREATE TABLE `users` (
   `date_created` datetime DEFAULT NULL,
   `last_login` datetime DEFAULT NULL,
   `enable_array_micropub` tinyint(4) NOT NULL DEFAULT '1',
+  `device_code` varchar(10) DEFAULT NULL,
+  `device_code_expires` datetime DEFAULT NULL,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 

views/alexa-auth.php

@@ -0,0 +1,19 @@
+<div class="narrow">
+  <?= partial('partials/header') ?>
+
+  <h2>Sign in to Teacup</h2>
+
+  <p>Go to teacup.p3k.io on your phone or computer and sign in.</p>
+  <p>Then go to the settings page to get a "device code", and enter that code here.</p>
+
+  <form action="/alexa/login" method="post" class="form-inline">
+    <div class="form-group">
+      <input type="number" name="code" value="" class="form-control">
+    </div>
+    <input type="submit" value="Sign In" class="btn btn-primary">
+    <input type="hidden" name="redirect_uri" value="<?= $this->redirect_uri ?>">
+    <input type="hidden" name="client_id" value="<?= $this->client_id ?>">
+    <input type="hidden" name="state" value="<?= $this->state ?>">
+  </form>  
+
+</div>

views/partials/footer.php

@@ -11,7 +11,7 @@
       <ul class="nav navbar-nav navbar-right">
         <? if(session('me')) { ?>
           <li><a href="/add-to-home?start">Add to Home Screen</a></li>
-          <li><span class="navbar-text"><?= preg_replace('/https?:\/\//','',session('me')) ?></span></li>
+          <li><a href="/settings"><?= preg_replace(['/https?:\/\//','/\/$/'],'',session('me')) ?></a></li>
           <li><a href="/signout">Sign Out</a></li>
         <? } else if(property_exists($this, 'authorizing')) { ?>
           <li class="navbar-text"><?= $this->authorizing ?></li>
@@ -25,7 +25,7 @@
       </ul>
     </div>
 
-    <p class="credits">&copy; <?=date('Y')?> by <a href="http://aaronparecki.com">Aaron Parecki</a>.
+    <p class="credits">&copy; <?=date('Y')?> by <a href="https://aaronparecki.com">Aaron Parecki</a>.
       This code is <a href="https://github.com/aaronpk/Teacup">open source</a>. 
       Feel free to send a pull request, or <a href="https://github.com/aaronpk/Teacup/issues">file an issue</a>.</p>
-  </div>
+  </div>

views/privacy.php

@@ -0,0 +1,8 @@
+<div class="narrow">
+  <?= partial('partials/header') ?>
+
+  <h2 id="introduction">Privacy Policy</h2>
+
+
+
+</div>

views/settings.php

@@ -0,0 +1,36 @@
+<div class="narrow">
+
+  <div class="jumbotron">
+
+    <h3>Device Code</h3>
+    <p id="device-message">If you are prompted to log in on a device, click the button below to generate a device code.</p>
+
+    <div id="device-code">
+      <input type="button" class="btn btn-primary" value="Generate Device Code" id="generate-code">
+    </div>
+
+  </div>
+
+</div>
+<style type="text/css">
+.screenshot {
+  -webkit-border-radius: 6px;
+  -moz-border-radius: 6px;
+  border-radius: 6px;
+}
+</style>
+<script>
+$(function(){
+  $("#generate-code").click(function(){
+    $.post("/settings/device-code", {
+      generate: 1
+    }, function(response){
+      $("#device-code").html('<h3>'+response.code+'</h3>');
+      $("#device-message").html('Enter the code below on the device in order to sign in. This code is valid for 5 minutes.');
+      setTimeout(function(){
+        window.location.reload();
+      }, 1000*300);
+    });
+  });
+})
+</script>