<?php

/*
 *  $Id$
 *
 * 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 dirname(dirname(__FILE__)) . '/S3.php';

/**
 * Downloads an object off S3
 * 
 * @version $ID$
 * @package phing.tasks.ext
 * @author Andrei Serdeliuc <andrei@serdeliuc.ro>
 * @extends Service_Amazon_S3
 */
class S3GetTask extends Service_Amazon_S3
{
    /**
     * This is where we'll store the object
     * 
     * (default value: null)
     * 
     * @var mixed
     * @access protected
     */
    protected $_target = null;
    
    /**
     * The S3 object we're working with
     * 
     * (default value: null)
     * 
     * @var mixed
     * @access protected
     */
    protected $_object = null;
    
	public function setObject($object)
	{
		if(empty($object) || !is_string($object)) {
			throw new BuildException('Object must be a non-empty string');
		}
		
		$this->_object = $object;
	}
	
	public function getObject()
	{
		if($this->_object === null) {
			throw new BuildException('Object is not set');
		}
		
		return $this->_object;
	}

    public function setTarget($target)
    {
        if(!is_file($target) && !is_dir($target) && !is_link($target)) {
            if(!is_writable(dirname($target))) {
                throw new BuildException('Target is not writable: ' . $target);
            }
        } else {
            if(!is_writable($target)) {
                throw new BuildException('Target is not writable: ' . $target);
            }
        }

        $this->_target = $target;
    }
    
    public function getTarget()
    {
        if($this->_target === null) {
            throw new BuildException('Target is not set');
        }
        
        return $this->_target;
    }
    
    public function execute()
    {
		$target = $this->getTarget();
		
        // Use the object name as the target if the current target is a directory
        if(is_dir($target)) {
            $target = rtrim($target, '/') . '/' . $this->getObject();
        }

		file_put_contents($target, $this->getObjectContents($this->getObject()));
    }
}