initial commit of validation classes.

system/validation/rules/acceptance_of.php

@@ -0,0 +1,39 @@
+<?php namespace System\Validation\Rules;
+
+use System\Input;
+use System\Validation\Rule;
+
+class Acceptance_Of extends Rule {
+
+	/**
+	 * The value is that is considered accepted.
+	 *
+	 * @var string
+	 */
+	public $accepts = '1';
+
+	/**
+	 * Evaluate the validity of an attribute.
+	 *
+	 * @param  string  $attribute
+	 * @param  array   $attributes
+	 * @return void
+	 */
+	public function check($attribute, $attributes)
+	{
+		return Input::has($attribute) and (string) Input::get($attribute) === $this->accepts;
+	}	
+
+	/**
+	 * Set the accepted value.
+	 *
+	 * @param  string  $value
+	 * @return Acceptance_Of
+	 */
+	public function accepts($value)
+	{
+		$this->accepts = $value;
+		return $this;
+	}
+
+}