<?php
/**
 * FH-Complete
 *
 * @package		FHC-API
 * @author		FHC-Team
 * @copyright	Copyright (c) 2016, fhcomplete.org
 * @license		GPLv3
 * @link		http://fhcomplete.org
 * @since		Version 1.0
 * @filesource
 */
// ------------------------------------------------------------------------

if (!defined('BASEPATH')) exit('No direct script access allowed');

class Dms extends APIv1_Controller
{
	/**
	 * 
	 */
	public function __construct()
	{
		parent::__construct();
		// Load model PersonModel
		$this->load->model('content/Dms_model', 'DmsModel');
		$this->load->model('content/DmsVersion_model', 'DmsVersionModel');
		$this->load->model('content/DmsFS_model', 'DmsFSModel');
	}
	
	/**
	 * 
	 */
	public function getDms()
	{
		$dms_id = $this->get('dms_id');
		$version = $this->get('version');
		
		if (isset($dms_id))
		{
			$result = $this->_getDms($dms_id, $version);
			if (is_object($result) && $result->error == EXIT_SUCCESS && is_array($result->retval) && count($result->retval) > 0)
			{
				$resultFS = $this->DmsFSModel->read($result->retval[0]->filename);
				if (is_object($resultFS) && $resultFS->error == EXIT_SUCCESS)
				{
					$result->retval[0]->file_content = $resultFS->retval;
				}
			}
			
			$this->response($result, REST_Controller::HTTP_OK);
		}
		else
		{
			$this->response();
		}
	}
	
	/**
	 * 
	 */
	public function postDms()
	{
		$dms = $this->_parseData($this->post());
		
		if ($this->_validate($dms))
		{
			$result = null;
			
			if (isset($dms['dms_id']))
			{
				if ($this->_saveFileOnUpdate($dms))
				{
					$result = $this->DmsModel->update($dms['dms_id'], $this->DmsModel->filterFields($dms));
					if ($result->error == EXIT_SUCCESS)
					{
						$result = $this->DmsVersionModel->update(array($dms['dms_id'], $dms['version']), $this->DmsVersionModel->filterFields($dms));
					}
				}
			}
			else
			{
				if (($filename = $this->_saveFileOnInsert($dms)) !== false)
				{
					$result = $this->DmsModel->insert($this->DmsModel->filterFields($dms));
					if ($result->error == EXIT_SUCCESS)
					{
						$result = $this->DmsVersionModel->insert($this->DmsVersionModel->filterFields($dms, $result->retval, $filename));
					}
				}
			}
			
			$this->response($result, REST_Controller::HTTP_OK);
		}
		else
		{
			$this->response();
		}
	}
	
	/**
	 * 
	 */
	private function _getDms($dms_id, $version = null)
	{
		$result = null;
		
		if (isset($dms_id))
		{
			$result = $this->DmsModel->addJoin('campus.tbl_dms_version', 'dms_id');
			if ($result->error == EXIT_SUCCESS)
			{
				$result = $this->DmsModel->addOrder('version', 'DESC');
				if ($result->error == EXIT_SUCCESS)
				{
					$result = $this->DmsModel->addLimit(1);
					if ($result->error == EXIT_SUCCESS)
					{
						if (!isset($version))
						{
							$result = $this->DmsModel->loadWhere(array('dms_id' => $dms_id));
						}
						else
						{
							$result = $this->DmsModel->loadWhere(array('dms_id' => $dms_id, 'version' => $version));
						}
					}
				}
			}
		}
		
		return $result;
	}
	
	/**
	 * 
	 */
	private function _saveFileOnUpdate($dms)
	{
		if(isset($dms['version']))
		{
			$result = $this->_getDms($dms['dms_id'], $dms['version']);
		
			if (is_object($result) && $result->error == EXIT_SUCCESS && is_array($result->retval) && count($result->retval) > 0)
			{
				$result = $this->DmsFSModel->write($result->retval[0]->filename, $dms['file_content']);
				if (is_object($result) && $result->error == EXIT_SUCCESS)
				{
					return true;
				}
			}
		}
		
		return false;
	}
	
	/**
	 * 
	 */
	private function _saveFileOnInsert($dms)
	{
		$filename = uniqid() . '.' . pathinfo($dms['name'], PATHINFO_EXTENSION);

		$result = $this->DmsFSModel->write($filename, $dms['file_content']);
		if (is_object($result) && $result->error == EXIT_SUCCESS)
		{
			return $filename;
		}
		
		return false;
	}
	
	private function _validate($dms = NULL)
	{
		if (!isset($dms['file_content']) || (isset($dms['file_content']) && $dms['file_content'] == ''))
		{
			return false;
		}
		if (!isset($dms['name']) || (isset($dms['name']) && $dms['name'] == ''))
		{
			return false;
		}
		
		return true;
	}
}