<?php
/**
 * Search criteria for e.g. searching in databases. Do not use this class if
 * you are looking for a ship or company, or what ever. Instead use this class
 * for looking in storages like the database.
 *
 * @author		Roland Haeder <webmaster@ship-simu.org>
 * @version		0.0.0
 * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Core Developer Team
 * @license		GNU GPL 3.0 or any newer version
 * @link		http://www.ship-simu.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
class SearchCriteria extends BaseCriteria implements LocalSearchCriteria {
	/**
	 * Criteria to handle
	 */
	private $criteria = array();

	/**
	 * Limitation for the search
	 */
	private $limit = 0;

	/**
	 * Skip these entries before using them
	 */
	private $skip = 0;

	/**
	 * Protected constructor
	 *
	 * @return	void
	 */
	protected function __construct () {
		// Call parent constructor
		parent::__construct(__CLASS__);
	}

	/**
	 * Create an instance of this class
	 *
	 * @return	$criteriaInstance	An instance of this criteria
	 */
	public static final function createSearchCriteria () {
		// Get a new instance
		$criteriaInstance = new SearchCriteria();

		// Return this instance
		return $criteriaInstance;
	}

	/**
	 * Setter for limit
	 *
	 * @param	$limit	Search limit
	 * @return	void
	 * @todo	Find a nice casting here. (int) allows until and including 32766.
	 */
	public final function setLimit ($limit) {
		$this->limit = $limit;
	}

	/**
	 * "Setter" for limit from a configuration entry
	 *
	 * @param	$configEntry	The configuration entry which hold a number as limit
	 * @return	void
	 */
	public final function setConfiguredLimit ($configEntry) {
		// Get the limit from config entry and set it
		$limit = $this->getConfigInstance()->getConfigEntry($configEntry);
		$this->setLimit($limit);
	}

	/**
	 * Getter for limit
	 *
	 * @return	$limit	Search limit
	 */
	public final function getLimit () {
		return $this->limit;
	}

	/**
	 * Setter for skip
	 *
	 * @param	$skip	Search skip
	 * @return	void
	 * @todo	Find a nice casting here. (int) allows until and including 32766.
	 */
	public final function setSkip ($skip) {
		$this->skip = $skip;
	}

	/**
	 * Getter for skip
	 *
	 * @return	$skip	Search skip
	 */
	public final function getSkip () {
		return $this->skip;
	}

	/**
	 * Checks whether the given key/value pair is matching with 'default' and one of 'choice' and
	 * never with in 'exclude'.
	 *
	 * @param	$key			Key element to check
	 * @param	$value			Value to check
	 * @return	$isMatching		Whether the key/value is matching or excluded
	 */
	public function isCriteriaMatching ($key, $value) {
		// Get 'default' search value
		$search = $this->getCriteriaElemnent($key);

		// 'default' check
		$isMatching = ((!is_null($search)) && ($search == $value));

		// Get 'choice' search value (can be NULL or comma-separated string)
		$search = $this->getCriteriaChoiceElemnent($key);

		// 'choice' check
		$isMatching = (($isMatching === TRUE) && ((is_null($search)) || (in_array($value, explode(',', $search)))));

		// Get 'exclude' search value
		$search = $this->getCriteriaExcludeElemnent($key);

		// 'exclude' check
		$isMatching = (($isMatching === TRUE) && ((is_null($search)) || ($search != $value)));

		// Return result
		return $isMatching;
	}
}

// [EOF]
?>