thephpleague#1 Extract variables from uri

Douglasdc3 · Nov 27, 2022 · fb04b91 · fb04b91
1 parent 99ddb48
commit fb04b91
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diff --git a/uri/UriTemplate.php b/uri/UriTemplate.php
@@ -128,4 +128,41 @@ public function expand(VariableBag|array $variables = []): UriInterface
             )
         );
     }
+
+    public function extract(string|UriInterface|\Psr\Http\Message\UriInterface $uri): VariableBag
+    {
+        $uri = Uri::createFromString($uri);
+
+        $pattern = preg_replace_callback(
+            '/\{[^}]*}.?/x',
+            function ($match) {
+                if (substr($match[0], -1) === '}') {
+                    return '(.*)$';
+                }
+
+                $character = preg_quote(substr($match[0], -1));
+
+                return '([^' . $character . ']*)' . $character;
+            },
+            $this->getTemplate(),
+        );
+        $pattern = str_replace('/', '\/', $pattern);
+        $pattern = "/$pattern/";
+
+        $variableBag = new VariableBag();
+
+        preg_match_all($pattern, $uri->toString(), $matches);
+        for ($i = 1, $matchCount = count($matches) ; $i < $matchCount; $i++) {
+            if (count($matches[$i]) === 0) {
+                continue;
+            }
+
+            $variableBag->assign(
+                $this->template->variableNames[$i - 1],
+                urldecode($matches[$i][0])
+            );
+        }
+
+        return $variableBag;
+    }
 }
diff --git a/uri/UriTemplateTest.php b/uri/UriTemplateTest.php
@@ -15,6 +15,7 @@
 
 use League\Uri\Exceptions\SyntaxError;
 use League\Uri\Exceptions\TemplateCanNotBeExpanded;
+use League\Uri\UriTemplate\VariableBag;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -407,4 +408,21 @@ public function testExpansionWithMultipleSameExpression(): void
 
         self::assertSame('foo/foo', (new UriTemplate($template, $data))->expand()->__toString());
     }
+
+    /**
+     * @covers \League\Uri\UriTemplate\Template
+     */
+    public function testExtractVariableBagWithUriString(): void
+    {
+        $template = 'https://example.com/hotels/{hotel}/bookings/{booking}';
+        $uriString = 'https://example.com/hotels/Rest%20%26%20Relax/bookings/42';
+
+        $uriTemplate = new UriTemplate($template);
+        $variables = $uriTemplate->extract($uriString);
+
+        self::assertInstanceOf(VariableBag::class, $variables);
+        self::assertCount(2, $variables);
+        self::assertSame('Rest & Relax', $variables['hotel']);
+        self::assertSame('42', $variables['booking']);
+    }
 }