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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Form handling code.
*
* @package PhpMyAdmin
*/
/**
* Base class for forms, loads default configuration options, checks allowed
* values etc.
*
* @package PhpMyAdmin
*/
class Form
{
/**
* Form name
* @var string
*/
public $name;
/**
* Arbitrary index, doesn't affect class' behavior
* @var int
*/
public $index;
/**
* Form fields (paths), filled by {@link readFormPaths()}, indexed by field name
* @var array
*/
public $fields;
/**
* Stores default values for some fields (eg. pmadb tables)
* @var array
*/
public $default;
/**
* Caches field types, indexed by field names
* @var array
*/
private $_fieldsTypes;
/**
* Constructor, reads default config values
*
* @param string $form_name
* @param array $form
* @param int $index arbitrary index, stored in Form::$index
*/
public function __construct($form_name, array $form, $index = null)
{
$this->index = $index;
$this->loadForm($form_name, $form);
}
/**
* Returns type of given option
*
* @param string $option_name path or field name
*
* @return string|null one of: boolean, integer, double, string, select, array
*/
public function getOptionType($option_name)
{
$key = ltrim(substr($option_name, strrpos($option_name, '/')), '/');
return isset($this->_fieldsTypes[$key])
? $this->_fieldsTypes[$key]
: null;
}
/**
* Returns allowed values for select fields
*
* @param string $option_path
*
* @return array
*/
public function getOptionValueList($option_path)
{
$value = ConfigFile::getInstance()->getDbEntry($option_path);
if ($value === null) {
trigger_error("$option_path - select options not defined", E_USER_ERROR);
return array();
}
if (!is_array($value)) {
trigger_error("$option_path - not a static value list", E_USER_ERROR);
return array();
}
// convert array('#', 'a', 'b') to array('a', 'b')
if (isset($value[0]) && $value[0] === '#') {
// remove first element ('#')
array_shift($value);
} else {
// convert value list array('a', 'b') to array('a' => 'a', 'b' => 'b')
$has_string_keys = false;
$keys = array();
for ($i = 0; $i < count($value); $i++) {
if (!isset($value[$i])) {
$has_string_keys = true;
break;
}
$keys[] = is_bool($value[$i]) ? (int)$value[$i] : $value[$i];
}
if (!$has_string_keys) {
$value = array_combine($keys, $value);
}
}
// $value has keys and value names, return it
return $value;
}
/**
* array_walk callback function, reads path of form fields from
* array (see file comment in setup.forms.php or user_preferences.forms.inc)
*
* @param mixed $value
* @param mixed $key
* @param mixed $prefix
*
* @return void
*/
private function _readFormPathsCallback($value, $key, $prefix)
{
static $group_counter = 0;
if (is_array($value)) {
$prefix .= $key . '/';
array_walk($value, array($this, '_readFormPathsCallback'), $prefix);
} else {
if (!is_int($key)) {
$this->default[$prefix . $key] = $value;
$value = $key;
}
// add unique id to group ends
if ($value == ':group:end') {
$value .= ':' . $group_counter++;
}
$this->fields[] = $prefix . $value;
}
}
/**
* Reads form paths to {@link $fields}
*
* @param array $form
*
* @return void
*/
protected function readFormPaths($form)
{
// flatten form fields' paths and save them to $fields
$this->fields = array();
array_walk($form, array($this, '_readFormPathsCallback'), '');
// $this->fields is an array of the form: [0..n] => 'field path'
// change numeric indexes to contain field names (last part of the path)
$paths = $this->fields;
$this->fields = array();
foreach ($paths as $path) {
$key = ltrim(substr($path, strrpos($path, '/')), '/');
$this->fields[$key] = $path;
}
// now $this->fields is an array of the form: 'field name' => 'field path'
}
/**
* Reads fields' types to $this->_fieldsTypes
*
* @return void
*/
protected function readTypes()
{
$cf = ConfigFile::getInstance();
foreach ($this->fields as $name => $path) {
if (strpos($name, ':group:') === 0) {
$this->_fieldsTypes[$name] = 'group';
continue;
}
$v = $cf->getDbEntry($path);
if ($v !== null) {
$type = is_array($v) ? 'select' : $v;
} else {
$type = gettype($cf->getDefault($path));
}
$this->_fieldsTypes[$name] = $type;
}
}
/**
* Reads form settings and prepares class to work with given subset of
* config file
*
* @param string $form_name
* @param array $form
*
* @return void
*/
public function loadForm($form_name, $form)
{
$this->name = $form_name;
$this->readFormPaths($form);
$this->readTypes();
}
}
?>