enhanced validation, added mimes config array.

system/validation/rules/length_of.php

@@ -0,0 +1,49 @@
+<?php namespace System\Validation\Rules;
+
+use System\Str;
+use System\Validation\Rangable_Rule;
+
+class Length_Of extends Rangable_Rule {
+
+	/**
+	 * Evaluate the validity of an attribute.
+	 *
+	 * @param  string  $attribute
+	 * @param  array   $attributes
+	 * @return bool
+	 */
+	public function check($attribute, $attributes)
+	{
+		if ( ! is_null($nullable = parent::check($attribute, $attributes)))
+		{
+			return $nullable;
+		}
+
+		$value = trim((string) $attributes[$attribute]);
+
+		// ---------------------------------------------------------
+		// Validate the exact length of the attribute.
+		// ---------------------------------------------------------
+		if ( ! is_null($this->size) and Str::length($value) !== $this->size)
+		{
+			$this->error = 'string_wrong_size';
+		}
+		// ---------------------------------------------------------
+		// Validate the maximum length of the attribute.
+		// ---------------------------------------------------------
+		elseif ( ! is_null($this->maximum) and Str::length($value) > $this->maximum)
+		{
+			$this->error = 'string_too_big';
+		}
+		// ---------------------------------------------------------
+		// Validate the minimum length of the attribute.
+		// ---------------------------------------------------------
+		elseif ( ! is_null($this->minimum) and Str::length($value) < $this->minimum)
+		{
+			$this->error = 'string_too_small';
+		}
+
+		return is_null($this->error);
+	}
+
+}