<?php
/**
* @package Joomla.Platform
* @subpackage Utilities
*
* @copyright Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* JArrayHelper is an array utility class for doing all sorts of odds and ends with arrays.
*
* @static
* @package Joomla.Platform
* @subpackage Utilities
* @since 11.1
*/
class JArrayHelper
{
/**
* Function to convert array to integer values
*
* @static
* @param array $array The source array to convert
* @param mixed $default A default value (int|array) to assign if $array is not an array
* @since 11.1
*/
public static function toInteger(&$array, $default = null)
{
if (is_array($array)) {
foreach ($array as $i => $v) {
$array[$i] = (int) $v;
}
} else {
if ($default === null) {
$array = array();
} elseif (is_array($default)) {
JArrayHelper::toInteger($default, null);
$array = $default;
} else {
$array = array((int) $default);
}
}
}
/**
* Utility function to map an array to a stdClass object.
*
* @param array $array The array to map.
* @param string $class Name of the class to create
*
* @return object The object mapped from the given array
* @since 11.1
*/
public static function toObject(&$array, $class = 'stdClass')
{
$obj = null;
if (is_array($array)) {
$obj = new $class();
foreach ($array as $k => $v) {
if (is_array($v)) {
$obj->$k = JArrayHelper::toObject($v, $class);
} else {
$obj->$k = $v;
}
}
}
return $obj;
}
public static function toString($array = null, $inner_glue = '=', $outer_glue = ' ', $keepOuterKey = false)
{
$output = array();
if (is_array($array)) {
foreach ($array as $key => $item) {
if (is_array ($item)) {
if ($keepOuterKey) {
$output[] = $key;
}
// This is value is an array, go and do it again!
$output[] = JArrayHelper::toString($item, $inner_glue, $outer_glue, $keepOuterKey);
} else {
$output[] = $key.$inner_glue.'"'.$item.'"';
}
}
}
return implode($outer_glue, $output);
}
/**
* Utility function to map an object to an array
*
* @param object The source object
* @param boolean True to recurve through multi-level objects
* @param string An optional regular expression to match on field names
*
* @return array The array mapped from the given object
* @since 11.1
*/
public static function fromObject($p_obj, $recurse = true, $regex = null)
{
if (is_object($p_obj)) {
return self::_fromObject($p_obj, $recurse, $regex);
}
else {
return null;
}
}
/**
* Private Utility function to map an object|array to an array
*
* @param array|object The source object|array
* @param boolean True to recurve through multi-level objects
* @param string An optional regular expression to match on field names
*
* @return array The array mapped from the given object
* @since 11.1
*/
private static function _fromObject($item, $recurse, $regex)
{
if (is_object($item))
{
$result = array();
foreach (get_object_vars($item) as $k => $v)
{
if (!$regex || preg_match($regex, $k))
{
if ($recurse) {
$result[$k] = self::_fromObject($v, $recurse, $regex);
}
else {
$result[$k] = $v;
}
}
}
}
elseif (is_array($item))
{
$result = array();
foreach ($item as $k => $v)
{
if ($recurse) {
$result[$k] = self::_fromObject($v, $recurse, $regex);
}
else {
$result[$k] = $v;
}
}
}
else
{
$result = $item;
}
return $result;
}
/**
* Extracts a column from an array of arrays or objects
*
* @param array $array The source array
* @param string $index The index of the column or name of object property
*
* @return array Column of values from the source array
* @since 11.1
*/
public static function getColumn(&$array, $index)
{
$result = array ();
if (is_array($array)) {
$n = count($array);
for ($i = 0; $i < $n; $i++) {
$item = & $array[$i];
if (is_array($item) && isset ($item[$index])) {
$result[] = $item[$index];
} elseif (is_object($item) && isset ($item-> $index)) {
$result[] = $item-> $index;
}
// else ignore the entry
}
}
return $result;
}
/**
* Utility function to return a value from a named array or a specified default
*
* @param array $array A named array
* @param string $name The key to search for
* @param mixed $default The default value to give if no key found
* @param string $type Return type for the variable (INT, FLOAT, STRING, WORD, BOOLEAN, ARRAY)
*
* @return mixed The value from the source array
* @since 11.1
*/
public static function getValue(&$array, $name, $default=null, $type='')
{
// Initialise variables.
$result = null;
if (isset ($array[$name])) {
$result = $array[$name];
}
// Handle the default case
if (is_null($result)) {
$result = $default;
}
// Handle the type constraint
switch (strtoupper($type)) {
case 'INT' :
case 'INTEGER' :
// Only use the first integer value
@ preg_match('/-?[0-9]+/', $result, $matches);
$result = @ (int) $matches[0];
break;
case 'FLOAT' :
case 'DOUBLE' :
// Only use the first floating point value
@ preg_match('/-?[0-9]+(\.[0-9]+)?/', $result, $matches);
$result = @ (float) $matches[0];
break;
case 'BOOL' :
case 'BOOLEAN' :
$result = (bool) $result;
break;
case 'ARRAY' :
if (!is_array($result)) {
$result = array ($result);
}
break;
case 'STRING' :
$result = (string) $result;
break;
case 'WORD' :
$result = (string) preg_replace('#\W#', '', $result);
break;
case 'NONE' :
default :
// No casting necessary
break;
}
return $result;
}
/**
* Method to determine if an array is an associative array.
*
* @param array An array to test.
*
* @return boolean True if the array is an associative array.
* @since 11.1
*/
public static function isAssociative($array)
{
if (is_array($array)) {
foreach (array_keys($array) as $k => $v) {
if ($k !== $v) {
return true;
}
}
}
return false;
}
/**
* Utility function to sort an array of objects on a given field
*
* @param array $arr An array of objects
* @param string|array $k The key or a array of key to sort on
* @param int|array $direction Direction or an array of direction to sort in [1 = Ascending] [-1 = Descending]
* @param bool|array $casesensitive Let sort occur case sensitive or insensitive
* @param bool|array $locale Let sort occur using the locale language or not
*
* @return array The sorted array of objects
* @since 11.1
*/
public static function sortObjects(&$a, $k, $direction=1, $casesensitive = true, $locale = false)
{
if (!is_array($locale) or !is_array($locale[0])) {
$locale = array($locale);
}
$GLOBALS['JAH_so'] = array(
'key' => (array)$k,
'direction' => (array)$direction,
'casesensitive' => (array)$casesensitive,
'locale' => $locale,
);
usort($a, array( __CLASS__ , '_sortObjects'));
unset($GLOBALS['JAH_so']);
return $a;
}
/**
* Private callback function for sorting an array of objects on a key
*
* @static
* @param array $a An array of objects
* @param array $b An array of objects
*
* @return int Comparison status
* @since 11.1
* @see JArrayHelper::sortObjects()
*/
public static function _sortObjects(&$a, &$b)
{
$params = $GLOBALS['JAH_so'];
for ($i = 0, $count = count($params['key']); $i < $count; $i++)
{
if (isset($params['direction'][$i])) {
$direction = $params['direction'][$i];
}
if (isset($params['casesensitive'][$i])) {
$casesensitive = $params['casesensitive'][$i];
}
if (isset($params['locale'][$i])) {
$locale = $params['locale'][$i];
}
$va = $a->$params['key'][$i];
$vb = $b->$params['key'][$i];
if ((is_bool($va) or is_numeric($va)) and (is_bool($vb) or is_numeric($vb))) {
$cmp = $va - $vb;
}
elseif ($casesensitive) {
$cmp = JString::strcmp($va, $vb, $locale);
}
else {
$cmp = JString::strcasecmp($va, $vb, $locale);
}
if ($cmp > 0) {
return $direction;
}
if ($cmp < 0) {
return - $direction;
}
}
return 0;
}
}
