<?php
class Validate{
	private $_passed = false,
			$_errors = array(),
			$_db = null;
	public function __construct(){
		$this->_db = DB::getInstance();
	}

	public function check($source, $items = array()){
		foreach($items as $item => $rules){
			foreach($rules as $rule => $rule_value){

				$value = trim($source[$item]);
				$item = escape($item);

				if($rule == 'required' && empty($value)) {
					$this->addError("{$item} is required");
				} else if(!empty($value)) {
					switch($rule) {
						case 'min';
							if(strlen($value) < $rule_value) {
								$this->addError("{$item} must be a minimum of {$rule_value} characters.");
							}
						break;
						case 'max';
							if(strlen($value) > $rule_value) {
								$this->addError("{$item} must be a maximum of {$rule_value} characters.");
							}
						break;
						case 'matches';
							if($value != $source[$rule_value]) {
								$this->addError("{$rule_value} must match {$item}");
							}
						break;
						case 'unique':
							$check = $this->_db->get($rule_value, array($item, "=", $value));
							if($check->count()){
							$this->addError("{$item} already exists.");
							}
						break;
					}
				}
			}
		}

		if(empty($this->_errors)) {
			$this->_passed = true;
		}

		return $this;
	}

	private function addError($error) {
		$this->_errors[] = $error;
	}

	public function errors() {
		return $this->_errors;
	}

	public function passed() {
		return $this->_passed;
	}
}
?>