W3Schools Plugin

src/Plugins/AntiW3Schools.php

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+<?php declare(strict_types=1);
+
+namespace Room11\Jeeves\Plugins;
+
+use Amp\Promise;
+use Amp\Success;
+use Room11\Jeeves\Chat\Client\ChatClient;
+use Room11\Jeeves\Chat\Message\Message;
+
+class AntiW3Schools extends BasePlugin
+{
+
+    const BAD_HOST_PATTERN = 'w3schools\.com';
+    const W3S_CATEGORY_RESPONSES = [
+        'html' => '[Check the Mozilla Developer Network HTML documentation](https://developer.mozilla.org/docs/Web/HTML) for help with HTML.',
+        'css' => '[Check the Mozilla Developer Network CSS documentation](https://developer.mozilla.org/docs/Web/CSS) for help with CSS.',
+        'js' => '[Check the Mozilla Developer Network JS documentation](https://developer.mozilla.org/docs/Web/JavaScript) for help with JavaScript.',
+        'sql' => '[Check MySQL\'s official MySQL documentation](http://dev.mysql.com/doc/) for more information.',
+        'php' => '[Check the official PHP Documentation](http://php.net/docs.php) for help with PHP.',
+        'bootstrap' => '[Check the official Bootstrap Documentation](http://getbootstrap.com/getting-started/) for help with the Bootstrap framework.',
+        'jquery' => '[Check the official jQuery API Documentation](http://api.jquery.com/) for help with the jQuery library.',
+        'angular' => '[Check the official AngularJS API Documentation](https://docs.angularjs.org/api) for help with the AngularJS framework.',
+        'xml'=> '[Check W3\'s documentation on XML](https://www.w3.org/standards/xml/core) for more information.',
+        'ajax' => '[Check the Mozilla Developer Network AJAX documentation](https://developer.mozilla.org/docs/AJAX) for more information.',
+    ];
+
+    private $chatClient;
+
+    public function __construct(ChatClient $chatClient)
+    {
+        $this->chatClient = $chatClient;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getName(): string
+    {
+        return 'AntiW3Schools';
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getDescription(): string
+    {
+        return 'A small monitoring plugin which bothers people when a w3schools link is detected.';
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getMessageHandler(): array
+    {
+        return [$this, 'handleMessage'];
+    }
+
+    /**
+     * Entry point for checking a message for w3schools links.
+     * @param Message $message
+     * @return Promise
+     */
+    public function handleMessage(Message $message): Promise
+    {
+        return $this->containsTerribleUri($message->getText())
+            ? $this->chatClient->postReply($message, $this->createReply($message))
+            : new Success();
+    }
+
+    /**
+     * Check if text contains a W3C link.
+     * @param string $text
+     * @return bool
+     */
+    private function containsTerribleUri(string $text) : bool
+    {
+        return preg_match('/' . self::BAD_HOST_PATTERN . '/i', $text) === 1;
+    }
+
+    /**
+     * Create a suitable message to bother people about W3C.
+     * @param Message $message
+     * @return string
+     */
+    private function createReply(Message $message) : string
+    {
+        $return = 'W3Schools should not be trusted as a reliable resource. [Click here to read why](http://www.w3fools.com/).';
+
+        $categories = $this->dissectCategoriesFromString($message->getText());
+
+        foreach($categories as $category) {
+            $return .= ' ' . self::W3S_CATEGORY_RESPONSES[$category];
+        }
+
+        return $return;
+
+    }
+
+    /**
+     * Retrieve W3S categories from a given string.
+     * @param string $text
+     * @return string[]
+     */
+    private function dissectCategoriesFromString(string $text) {
+
+        // Extract the category from all W3S URIs found.
+        $categoryNames = array_keys(self::W3S_CATEGORY_RESPONSES);
+
+        $matchSets = [];
+
+        if(
+            !preg_match_all(
+                '/' . self::BAD_HOST_PATTERN . '\/(' . implode('|', $categoryNames) . ')\//i',
+                $text,
+                $matchSets
+            ) > 0
+        ) {
+            // If no matches were found (or the regex failed), return no results.
+            return [];
+        }
+
+        // Prevent multiple messages for the same category by only returning one of each type found.
+        return array_unique(
+            array_map(
+                'strtolower',
+                $matchSets[1]
+            )
+        );
+    }
+}

tests/src/Chat/Plugin/AntiW3SchoolsTest.php

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+<?php declare(strict_types = 1);
+
+namespace Room11\Jeeves\Tests\Chat\Plugin;
+
+use Amp\Success;
+use Room11\Jeeves\Chat\Message\Message;
+use Room11\Jeeves\Plugins\AntiW3Schools;
+
+class AntiW3SchoolsTest extends AbstractPluginTest
+{
+    public function testCommandName()
+    {
+        $this->assertSame('AntiW3Schools', $this->plugin->getName());
+        $this->assertSame(
+            'A small monitoring plugin which bothers people when a w3schools link is detected.',
+            $this->plugin->getDescription()
+        );
+        $this->assertSame([], $this->plugin->getEventHandlers());
+        $this->assertSame([], $this->plugin->getCommandEndpoints());
+    }
+
+    public function testValidMessageHandler()
+    {
+        $result = $this->plugin->getMessageHandler();
+
+        $this->assertTrue(is_callable($result), 'Message handler expected to be callable, but wasn\'t.');
+    }
+
+    public function testNoMentionOfW3Schools()
+    {
+        /** @var AntiW3Schools $plugin */
+        $plugin = $this->plugin;
+
+        $message = $this->getMockBuilder(Message::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $message
+            ->expects($this->once())
+            ->method('getText')
+            ->will($this->returnValue('Happy Friday!'));
+
+        $result = $plugin->handleMessage($message);
+        $this->assertInstanceOf(Success::class, $result);
+    }
+
+    public function testBasicW3SchoolsMention()
+    {
+        /** @var AntiW3Schools $plugin */
+        $plugin = $this->plugin;
+        $client = $this->client;
+
+        $message = $this->getMockBuilder(Message::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $message
+            ->expects($this->exactly(2))
+            ->method('getText')
+            ->will($this->returnValue('What\'s wrong with w3schools.com?'));
+
+        $client
+            ->expects($this->once())
+            ->method('postReply')
+            ->with(
+                $this->identicalTo($message),
+                $this->equalTo('W3Schools should not be trusted as a reliable resource. [Click here to read why](http://www.w3fools.com/).')
+            );
+
+        $plugin->handleMessage($message);
+
+    }
+
+    public function testSingleCategoryW3SchoolsMention()
+    {
+        /** @var AntiW3Schools $plugin */
+        $plugin = $this->plugin;
+        $client = $this->client;
+
+        $message = $this->getMockBuilder(Message::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $message
+            ->expects($this->exactly(2))
+            ->method('getText')
+            ->will($this->returnValue('How do I nest HTML elements like in http://www.w3schools.com/html/html_elements.asp?'));
+
+        $client
+            ->expects($this->once())
+            ->method('postReply')
+            ->with(
+                $this->identicalTo($message),
+                $this->equalTo(
+                    'W3Schools should not be trusted as a reliable resource. [Click here to read why](http://www.w3fools.com/).'
+                    . ' [Check the Mozilla Developer Network HTML documentation](https://developer.mozilla.org/docs/Web/HTML) for help with HTML.'
+                )
+            );
+
+        $plugin->handleMessage($message);
+    }
+
+    public function testMultipleCategoryW3SchoolsMentions()
+    {
+        /** @var AntiW3Schools $plugin */
+        $plugin = $this->plugin;
+        $client = $this->client;
+
+        $message = $this->getMockBuilder(Message::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $message
+            ->expects($this->exactly(2))
+            ->method('getText')
+            ->will($this->returnValue('How do I nest HTML elements like in w3schools.com/html/html_elements.asp and styled like w3schools.com/css/fake_page.asp?'));
+
+        $client
+            ->expects($this->once())
+            ->method('postReply')
+            ->with(
+                $this->identicalTo($message),
+                $this->equalTo(
+                    'W3Schools should not be trusted as a reliable resource. [Click here to read why](http://www.w3fools.com/).'
+                    . ' [Check the Mozilla Developer Network HTML documentation](https://developer.mozilla.org/docs/Web/HTML) for help with HTML.'
+                    . ' [Check the Mozilla Developer Network CSS documentation](https://developer.mozilla.org/docs/Web/CSS) for help with CSS.'
+                )
+            );
+
+        $plugin->handleMessage($message);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp()
+    {
+        parent::setUp();
+
+        $this->plugin = new AntiW3Schools($this->client);
+    }
+}