Added pull request diff matcher

src/AppBundle/PullRequests/Diff.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace AppBundle\PullRequests;
+
+/**
+ * Extract human readable data from Pull diff.
+ */
+class Diff
+{
+    /* string */
+    public static $content;
+    /* array */
+    public static $lines;
+
+    const TOKEN_PLUS = '+';
+
+    /**
+     * Parse diff content and look for regexp pattern.
+     * 
+     * @param string a regex expression
+     * @param string the diff content
+     * 
+     * @return bool
+     */
+    public static function match($pattern, $diffContent)
+    {
+        self::$content = $diffContent;
+
+        $token = strtok($diffContent, PHP_EOL);
+
+        while ($token !== false) {
+            if (
+                0 === strpos($token, self::TOKEN_PLUS) &&
+                1 === preg_match($pattern, $token)
+            ) {
+                return true;
+            }
+            $token = strtok(PHP_EOL);
+        }
+
+        return false;
+    }
+}

tests/AppBundle/PullRequests/DiffTest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace tests\AppBundle\PullRequests;
+
+use AppBundle\PullRequests\Diff;
+
+/**
+ * @author Mickaël Andrieu <andrieu.travail@gmail.com>
+ */
+class DiffTest extends \PHPUnit_Framework_TestCase
+{
+    private $gitDiff;
+    const TRANS_PATTERN = '#(trans\(|l\()#';
+
+    public function testMatch()
+    {
+        $matched = Diff::match(self::TRANS_PATTERN, $this->getExpectedDiff(true));
+        $this->assertTrue($matched);
+
+        $unMatched = Diff::match(self::TRANS_PATTERN, $this->getExpectedDiff(false));
+        $this->assertFalse($unMatched);
+    }
+
+    private function getExpectedDiff($matched = true)
+    {
+        $filename = $matched ? 'matched' : 'not_matched';
+
+        return file_get_contents(__DIR__.'/../webhook_examples/git_diff_'.$filename.'.diff');
+    }
+}