<?php
/**
 * iF.SVNAdmin
 * Copyright (c) 2010 by Manuel Freiholz
 * http://www.insanefactory.com/
 *
 * 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; version 2
 * of the License.
 *
 * 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.
 */

/**
 * Scans the given array for emtpy values and removes them.
 * 
 * @param $arr The array to be scanned.
 * @return array The array with no more emtpy values.
 */
function if_array_remove_empty_values(&$arr)
{
	$removeCount = 0;
	$arrCount = count($arr);
	for ($i=0; $i<$arrCount; $i++)
	{
		if (empty($arr[$i]))
		{
			unset($arr[$i]);
			$removeCount++;
		}
	}
	
	if ($removeCount > 0)
		$arr = array_values($arr);
	return $arr;
}

/**
 * Checks whether the variable is set and not empty.
 * @param(optional) reference to scalar, will be set to 'get' or 'post'
 * @return bool
 */
function check_request_var( $varname, &$method = NULL )
{
  if( isset($_POST[$varname]) && !empty($_POST[$varname]) )
  {
    $method = 'post';
    return TRUE;
  }
  else if( isset($_GET[$varname]) && !empty($_GET[$varname]) )
  {
    $method = 'get';
    return TRUE;
  }
  return FALSE;
}

function get_request_var( $varname )
{
  $method = NULL;
  if( check_request_var($varname,$method) )
  {
    switch($method)
    {
      case 'get': return $_GET[$varname];
      case 'post': return $_POST[$varname];
    }
  }
  return FALSE;
}

function remove_item_by_value( &$arr, $value, $preserve = false )
{
  foreach( $arr as $key=>&$val )
  {
    if( $val == $value )
    {
      unset( $arr[$key] );
    }
  }
  
  if( $preserve )
  {
    return array_values( $arr );
  }
  return $arr;
}

function if_array_remove_object_element(&$arr, $obj, $compare_property)
{
  foreach ($arr as $key => &$val)
  {
    if (is_object($val))
    {
      if (property_exists($val, $compare_property))
      {
        if ($obj->$compare_property == $val->$compare_property)
        {
          unset($arr[$key]);
        }
      }
      else
      {
        // The object doesn't have the compare_property.
        // ..
      }
    }
    else
    {
      // Element is no object.
      continue;
    }
  }
}

function checkPHPVersion($minimumVersion)
{
  $phpVersion = phpversion();
  $phpVersionParts = explode(".", $phpVersion);
  $minVersionParts = explode(".", $minimumVersion);
  $minVersionPartsCount = count($minVersionParts);

  $check = true;
  if ($minVersionPartsCount >= 1)
    if ($phpVersionParts[0] < $minVersionParts[0])
      $check = false;

  if ($minVersionPartsCount >= 2)
    if ($phpVersionParts[1] < $minVersionParts[1])
      $check = false;

  if ($minVersionPartsCount >= 3)
    if ($phpVersionParts[2] < $minVersionParts[2])
      $check = false;

  return $check;
}

function currentScriptFileName()
{
  $parts = explode("/", $_SERVER["SCRIPT_NAME"]);
  return $parts[count($parts)-1];
}

function tr($text, $args=null)
{
  global $appTR;
  return $appTR->tr($text, $args);
}
?>