Added urban dictionary command

Author: PeeHaa

Diff for: cli/run.php

@@ -11,6 +11,7 @@
 use Room11\Jeeves\Chat\Message\Factory as MessageFactory;
 
 use Room11\Jeeves\Chat\Command\Version as VersionCommand;
+use Room11\Jeeves\Chat\Command\Urban as UrbanCommand;
 
 use Amp\Websocket\Handshake;
 use Room11\Jeeves\WebSocket\Handler;
@@ -33,6 +34,7 @@
 
 $commands = (new CommandCollection())
     ->register(new VersionCommand($httpClient, $chatKey))
+    ->register(new UrbanCommand($httpClient, $chatKey))
 ;
 
 \Amp\run(function () use ($webSocketUrl, $httpClient, $chatKey, $roomCollection, $commands, $logger) {

Diff for: src/Chat/Command/Urban.php

@@ -0,0 +1,70 @@
+<?php declare(strict_types=1);
+
+namespace Room11\Jeeves\Chat\Command;
+
+use Room11\Jeeves\Chat\Message\Message;
+use Amp\Artax\Client as HttpClient;
+use Amp\Artax\Request;
+use Amp\Artax\FormBody;
+
+class Urban implements Command
+{
+    const COMMAND = 'urban';
+
+    private $httpClient;
+
+    private $chatKey;
+
+    public function __construct(HttpClient $httpClient, string $chatKey)
+    {
+        $this->httpClient = $httpClient;
+        $this->chatKey    = $chatKey;
+    }
+
+    public function handle(Message $message): \Generator
+    {
+        if (!$this->validMessage($message)) {
+            return;
+        }
+
+        yield from $this->getResult($message);
+    }
+
+    private function validMessage(Message $message): bool
+    {
+        return get_class($message) === 'Room11\Jeeves\Chat\Message\NewMessage'
+            && strpos($message->getContent(), '!!urban') === 0
+            && count(explode(' ', trim($message->getContent())) > 1);
+    }
+
+    private function getResult(Message $message): \Generator
+    {
+        $fullCommand = explode(' ', trim($message->getContent()));
+
+        array_shift($fullCommand);
+
+        $promise = $this->httpClient->request('http://api.urbandictionary.com/v0/define?term=' . implode('%20', $fullCommand));
+
+        $response = yield $promise;
+
+        $result = json_decode($response->getBody(), true);
+
+        yield from $this->postResult($message, $result);
+    }
+
+    private function postResult(Message $message, array $result)
+    {
+        $body = (new FormBody)
+            ->addField('text', sprintf('[ [%s](%s) ] %s', $result['list'][0]['word'], $result['list'][0]['permalink'], str_replace('\r\n', "\r\n", $result['list'][0]['definition'])))
+            ->addField('fkey', $this->chatKey);
+
+        $request = (new Request)
+            ->setUri('http://chat.stackoverflow.com/chats/' . $message->getRoomid() . '/messages/new')
+            ->setMethod('POST')
+            ->setBody($body);
+
+        $promise = $this->httpClient->request($request);
+
+        yield $promise;
+    }
+}