Allow replace argument placeholders with data values

Author: natanfelles

src/Validation.php

@@ -477,6 +477,7 @@ protected function validateField(string $field, array $rules, array $data) : boo
         }
         $status = true;
         foreach ($rules as $rule) {
+            $rule['args'] = $this->replaceArgs($rule['args'], $data);
             $status = $this->validateRule($rule['rule'], $field, $rule['args'], $data);
             if ($status !== true) {
                 $rule = $this->setEqualsField($rule);
@@ -487,6 +488,30 @@ protected function validateField(string $field, array $rules, array $data) : boo
         return $status;
     }
 
+    /**
+     * Replace argument placeholders with data values.
+     *
+     * @param array<mixed> $args
+     * @param array<string,mixed> $data
+     *
+     * @return array<mixed>
+     */
+    protected function replaceArgs(array $args, array $data) : array
+    {
+        $result = [];
+        foreach ($args as $arg) {
+            if (\preg_match('#^{(\w+)}$#', $arg)) {
+                $key = \substr($arg, 1, -1);
+                if (isset($data[$key])) {
+                    $result[] = $data[$key];
+                    continue;
+                }
+            }
+            $result[] = $arg;
+        }
+        return $result;
+    }
+
     /**
      * @param array<string,mixed> $rule
      *

tests/ValidationMock.php

@@ -26,6 +26,11 @@ public function extractRules(string $rules) : array
         return parent::extractRules($rules);
     }
 
+    public function replaceArgs(array $args, array $data) : array
+    {
+        return parent::replaceArgs($args, $data);
+    }
+
     public function setError(string $field, string $rule, array $params) : static
     {
         return parent::setError($field, $rule, $params);

tests/ValidationTest.php

@@ -381,6 +381,21 @@ public function testSetError() : void
         );
     }
 
+    public function testReplaceArgs() : void
+    {
+        $args = ['foo', 'bar', '{id}', '{x}', 'baz', '{email}'];
+        $data = [
+            'email' => 'me@domain.tld',
+            'id' => 25,
+            'bar' => 'Bar',
+            'foo' => 'Foo',
+        ];
+        self::assertSame(
+            ['foo', 'bar', 25, '{x}', 'baz', 'me@domain.tld'],
+            $this->validation->replaceArgs($args, $data)
+        );
+    }
+
     public function testValidate() : void
     {
         self::assertTrue($this->validation->validate([]));