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<?php
/**
* @package Joomla.Platform
* @subpackage Utilities
*
* @copyright Copyright (C) 2005 - 2012 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.
*
* @package Joomla.Platform
* @subpackage Utilities
* @since 11.1
*/
class JArrayHelper
{
/**
* Option to perform case-sensitive sorts.
*
* @var mixed Boolean or array of booleans.
* @since 11.3
*/
protected static $sortCase;
/**
* Option to set the sort direction.
*
* @var mixed Integer or array of integers.
* @since 11.3
*/
protected static $sortDirection;
/**
* Option to set the object key to sort on.
*
* @var string
* @since 11.3
*/
protected static $sortKey;
/**
* Option to perform a language aware sort.
*
* @var mixed Boolean or array of booleans.
* @since 11.3
*/
protected static $sortLocale;
/**
* Function to convert array to integer values
*
* @param array &$array The source array to convert
* @param mixed $default A default value (int|array) to assign if $array is not an array
*
* @return void
*
* @since 11.1
*/
public static function toInteger(&$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;
}
/**
* Utility function to map an array to a string.
*
* @param array $array The array to map.
* @param string $inner_glue The glue (optional, defaults to '=') between the key and the value.
* @param string $outer_glue The glue (optional, defaults to ' ') between array elements.
* @param boolean $keepOuterKey True if final key should be kept.
*
* @return string The string mapped from the given array
*
* @since 11.1
*/
public static function toString($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 $p_obj The source object
* @param boolean $recurse True to recurse through multi-level objects
* @param string $regex An optional regular expression to match on field names
*
* @return array The array mapped from the given object
*
* @since 11.1
*/
public static function fromObject($p_obj, $recurse = true, $regex = null)
{
if (is_object($p_obj))
{
return self::_fromObject($p_obj, $recurse, $regex);
}
else
{
return null;
}
}
/**
* Utility function to map an object or array to an array
*
* @param mixed $item The source object or array
* @param boolean $recurse True to recurse through multi-level objects
* @param string $regex An optional regular expression to match on field names
*
* @return array The array mapped from the given object
*
* @since 11.1
*/
protected static function _fromObject($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)
{
$result[$k] = self::_fromObject($v, $recurse, $regex);
}
}
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 $array An array to test.
*
* @return boolean True if the array is an associative array.
*
* @since 11.1
*/
public static function isAssociative($array)
{
if (is_array($array))
{
foreach (array_keys($array) as $k => $v)
{
if ($k !== $v)
{
return true;
}
}
}
return false;
}
/**
* Pivots an array to create a reverse lookup of an array of scalars, arrays or objects.
*
* @param array $source The source array.
* @param string $key Where the elements of the source array are objects or arrays, the key to pivot on.
*
* @return array An array of arrays pivoted either on the value of the keys, or an individual key of an object or array.
*
* @since 11.3
*/
public function pivot($source, $key = null)
{
$result = array();
$counter = array();
foreach ($source as $index => $value)
{
// Determine the name of the pivot key, and its value.
if (is_array($value))
{
// If the key does not exist, ignore it.
if (!isset($value[$key]))
{
continue;
}
$resultKey = $value[$key];
$resultValue = &$source[$index];
}
elseif (is_object($value))
{
// If the key does not exist, ignore it.
if (!isset($value->$key))
{
continue;
}
$resultKey = $value->$key;
$resultValue = &$source[$index];
}
else
{
// Just a scalar value.
$resultKey = $value;
$resultValue = $index;
}
// The counter tracks how many times a key has been used.
if (empty($counter[$resultKey]))
{
// The first time around we just assign the value to the key.
$result[$resultKey] = $resultValue;
$counter[$resultKey] = 1;
}
elseif ($counter[$resultKey] == 1)
{
// If there is a second time, we convert the value into an array.
$result[$resultKey] = array(
$result[$resultKey],
$resultValue,
);
$counter[$resultKey]++;
}
else
{
// After the second time, no need to track any more. Just append to the existing array.
$result[$resultKey][] = $resultValue;
}
}
unset($counter);
return $result;
}
/**
* Utility function to sort an array of objects on a given field
*
* @param array &$a An array of objects
* @param mixed $k The key (string) or a array of key to sort on
* @param mixed $direction Direction (integer) or an array of direction to sort in [1 = Ascending] [-1 = Descending]
* @param mixed $caseSensitive Boolean or array of booleans to let sort occur case sensitive or insensitive
* @param mixed $locale Boolean or array of booleans to let sort occur using the locale language or not
*
* @return array The sorted array of objects
*
* @since 11.1
*/
public static function sortObjects(&$a, $k, $direction = 1, $caseSensitive = true, $locale = false)
{
if (!is_array($locale) or !is_array($locale[0]))
{
$locale = array($locale);
}
self::$sortCase = (array) $caseSensitive;
self::$sortDirection = (array) $direction;
self::$sortKey = (array) $k;
self::$sortLocale = $locale;
usort($a, array(__CLASS__, '_sortObjects'));
self::$sortCase = null;
self::$sortDirection = null;
self::$sortKey = null;
self::$sortLocale = null;
return $a;
}
/**
* Callback function for sorting an array of objects on a key
*
* @param array &$a An array of objects
* @param array &$b An array of objects
*
* @return integer Comparison status
*
* @see JArrayHelper::sortObjects()
* @since 11.1
*/
protected static function _sortObjects(&$a, &$b)
{
$key = self::$sortKey;
for ($i = 0, $count = count($key); $i < $count; $i++)
{
if (isset(self::$sortDirection[$i]))
{
$direction = self::$sortDirection[$i];
}
if (isset(self::$sortCase[$i]))
{
$caseSensitive = self::$sortCase[$i];
}
if (isset(self::$sortLocale[$i]))
{
$locale = self::$sortLocale[$i];
}
$va = $a->$key[$i];
$vb = $b->$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;
}
/**
* Multidimensional array safe unique test
*
* @param array $myArray The array to make unique.
*
* @return array
*
* @see http://php.net/manual/en/function.array-unique.php
* @since 11.2
*/
public static function arrayUnique($myArray)
{
if (!is_array($myArray))
{
return $myArray;
}
foreach ($myArray as &$myvalue)
{
$myvalue = serialize($myvalue);
}
$myArray = array_unique($myArray);
foreach ($myArray as &$myvalue)
{
$myvalue = unserialize($myvalue);
}
return $myArray;
}
}
