<?php
/*
 *  $Id: EqualsCondition.php 905 2010-10-05 16:28:03Z mrook $
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information please see
 * <http://phing.info>.
 */

require_once 'phing/tasks/system/condition/Condition.php';

/**
 *  A simple string comparator.  Compares two strings for eqiality in a
 *  binary safe manner. Implements the condition interface specification.
 *
 *  @author    Andreas Aderhold <andi@binarycloud.com>
 *  @copyright © 2001,2002 THYRELL. All rights reserved
 *  @version   $Revision: 905 $ $Date: 2010-10-05 18:28:03 +0200 (Tue, 05 Oct 2010) $
 *  @access    public
 *  @package   phing.tasks.system.condition
 */
class EqualsCondition implements Condition {

    private $arg1;
    private $arg2;
    private $trim = false;
    private $caseSensitive = true;
    
    public function setArg1($a1) {
        $this->arg1 = $a1;
    }

    public function setArg2($a2) {
        $this->arg2 = $a2;
    }

    /**
     * Should we want to trim the arguments before comparing them?
     * @param boolean $b
     */
    public function setTrim($b) {
        $this->trim = (boolean) $b;
    }

    /**
     * Should the comparison be case sensitive?
     * @param boolean $b
     */
    public function setCaseSensitive($b) {
        $this->caseSensitive = (boolean) $b;
    } 
    
    public function evaluate() {
        if ($this->arg1 === null || $this->arg2 === null) {
            throw new BuildException("Both arg1 and arg2 are required in equals.");
        }
        
        if ($this->trim) {
            $this->arg1 = trim($this->arg1);
            $this->arg2 = trim($this->arg2);
        }
        
        //print("[comparison] Comparing '".$this->arg1."' and '".$this->arg2."'\n");
        return $this->caseSensitive ? $this->arg1 === $this->arg2 : strtolower($this->arg1) === strtolower($this->arg2);
    }
}