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<?php |
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/** |
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* Part of the Joomla Framework Form Package |
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* |
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* @copyright Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved. |
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* @license GNU General Public License version 2 or later; see LICENSE |
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*/ |
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namespace Joomla\Form; |
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use Joomla\Filesystem\Path; |
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/** |
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* Helper class for the Form package. |
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* Provides a storage for filesystem's paths where Joomla\Form entities reside and methods for creating those entities. |
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* Also stores objects with entities' prototypes for further reusing. |
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* |
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* @since 1.0 |
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* @deprecated The joomla/form package is deprecated |
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*/ |
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class FormHelper |
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{ |
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/** |
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* Array with paths where entities(field, rule, form) can be found. |
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* |
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* Array's structure: |
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* <code> |
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* paths: |
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* {ENTITY_NAME}: |
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* - /path/1 |
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* - /path/2 |
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* </code> |
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* |
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* @var array |
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* @since 1.0 |
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* |
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*/ |
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protected static $paths; |
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/** |
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* Static array of Joomla\Form's entity objects for re-use. |
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* Prototypes for all fields and rules are here. |
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* |
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* Array's structure: |
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* <code> |
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* entities: |
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* {ENTITY_NAME}: |
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* {KEY}: {OBJECT} |
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* </code> |
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* |
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* @var array |
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* @since 1.0 |
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* @deprecated 2.0 Objects should be autoloaded |
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*/ |
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protected static $entities = array(); |
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/** |
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* Method to load a form field object given a type. |
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* |
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* @param string $type The field type. |
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* @param boolean $new Flag to toggle whether we should get a new instance of the object. |
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* |
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* @return mixed Field object on success, false otherwise. |
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* |
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* @since 1.0 |
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* @deprecated 2.0 Field objects should be autoloaded |
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*/ |
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public static function loadFieldType($type, $new = true) |
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{ |
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return self::loadType('field', $type, $new); |
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} |
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/** |
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* Method to load a form rule object given a type. |
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* |
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* @param string $type The rule type. |
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* @param boolean $new Flag to toggle whether we should get a new instance of the object. |
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* |
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* @return mixed Rule object on success, false otherwise. |
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* |
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* @since 1.0 |
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* @deprecated 2.0 Rule objects should be autoloaded |
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*/ |
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public static function loadRuleType($type, $new = true) |
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{ |
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return self::loadType('rule', $type, $new); |
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} |
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/** |
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* Method to load a form entity object given a type. |
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* Each type is loaded only once and then used as a prototype for other objects of same type. |
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* Please, use this method only with those entities which support types (forms don't support them). |
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* |
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* @param string $entity The entity. |
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* @param string $type The entity type. |
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* @param boolean $new Flag to toggle whether we should get a new instance of the object. |
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* |
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* @return mixed Entity object on success, false otherwise. |
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* |
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* @since 1.0 |
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* @deprecated 2.0 Objects should be autoloaded |
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*/ |
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protected static function loadType($entity, $type, $new = true) |
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{ |
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// Reference to an array with current entity's type instances |
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$types = &self::$entities[$entity]; |
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$key = md5($type); |
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// Return an entity object if it already exists and we don't need a new one. |
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if (isset($types[$key]) && $new === false) |
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{ |
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return $types[$key]; |
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} |
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$class = self::loadClass($entity, $type); |
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if ($class !== false) |
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{ |
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// Instantiate a new type object. |
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$types[$key] = new $class; |
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return $types[$key]; |
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} |
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else |
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{ |
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return false; |
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} |
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} |
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/** |
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* Attempt to import the Field class file if it isn't already imported. |
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* You can use this method outside of Joomla\Form for loading a field for inheritance or composition. |
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* |
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* @param string $type Type of a field whose class should be loaded. |
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* |
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* @return mixed Class name on success or false otherwise. |
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* |
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* @since 1.0 |
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*/ |
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public static function loadFieldClass($type) |
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{ |
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return self::loadClass('field', $type); |
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} |
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/** |
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* Attempt to import the Rule class file if it isn't already imported. |
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* You can use this method outside of Joomla\Form for loading a rule for inheritance or composition. |
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* |
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* @param string $type Type of a rule whose class should be loaded. |
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* |
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* @return mixed Class name on success or false otherwise. |
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* |
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* @since 1.0 |
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*/ |
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public static function loadRuleClass($type) |
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{ |
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return self::loadClass('rule', $type); |
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} |
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/** |
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* Load a class for one of the form's entities of a particular type. |
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* Currently, it makes sense to use this method for the "field" and "rule" entities |
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* (but you can support more entities in your subclass). |
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* |
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* @param string $entity One of the form entities (field or rule). |
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* @param string $type Type of an entity. |
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* |
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* @return mixed Class name on success or false otherwise. |
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* |
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* @since 1.0 |
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*/ |
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protected static function loadClass($entity, $type) |
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{ |
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if (strpos($type, '.')) |
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{ |
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list($prefix, $type) = explode('.', $type); |
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} |
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else |
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{ |
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$prefix = 'Joomla'; |
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} |
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$class = ucfirst($prefix) . '\\Form\\' . ucfirst($entity); |
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if ($entity === 'field') |
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{ |
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$class .= '_' . ucfirst($type); |
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} |
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else |
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{ |
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$class .= '\\' . ucfirst($type); |
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} |
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if (class_exists($class)) |
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{ |
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return $class; |
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} |
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/* |
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* @deprecated 2.0 - Classes should be autoloaded, path lookups will no longer be supported. |
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*/ |
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// Get the field search path array. |
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$paths = self::addPath($entity); |
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// If the type is complex, add the base type to the paths. |
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if ($pos = strpos($type, '_')) |
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{ |
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// Add the complex type prefix to the paths. |
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for ($i = 0, $n = count($paths); $i < $n; $i++) |
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{ |
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// Derive the new path. |
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$path = $paths[$i] . '/' . strtolower(substr($type, 0, $pos)); |
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// If the path does not exist, add it. |
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if (!in_array($path, $paths)) |
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{ |
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$paths[] = $path; |
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} |
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} |
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// Break off the end of the complex type. |
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$type = substr($type, $pos + 1); |
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} |
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// Try to find the class file. |
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$type = strtolower($type) . '.php'; |
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foreach ($paths as $path) |
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{ |
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if ($file = Path::find($path, $type)) |
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{ |
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require_once $file; |
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if (class_exists($class)) |
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{ |
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break; |
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} |
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} |
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} |
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// Check for all if the class exists. |
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return class_exists($class) ? $class : false; |
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} |
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/** |
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* Method to add a path to the list of field include paths. |
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* |
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* @param mixed $new A path or array of paths to add. |
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* |
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* @return array The list of paths that have been added. |
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* |
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* @since 1.0 |
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* @deprecated 2.0 Field objects should be autoloaded |
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*/ |
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public static function addFieldPath($new = null) |
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{ |
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return self::addPath('field', $new); |
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} |
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/** |
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* Method to add a path to the list of form include paths. |
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* |
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* @param mixed $new A path or array of paths to add. |
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* |
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* @return array The list of paths that have been added. |
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* |
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* @since 1.0 |
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*/ |
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public static function addFormPath($new = null) |
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{ |
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return self::addPath('form', $new); |
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} |
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/** |
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* Method to add a path to the list of rule include paths. |
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* |
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* @param mixed $new A path or array of paths to add. |
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* |
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* @return array The list of paths that have been added. |
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* |
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* @since 1.0 |
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* @deprecated 2.0 Rule objects should be autoloaded |
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*/ |
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public static function addRulePath($new = null) |
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{ |
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return self::addPath('rule', $new); |
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} |
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/** |
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* Method to add a path to the list of include paths for one of the form's entities. |
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* Currently supported entities: field, rule and form. You are free to support your own in a subclass. |
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* |
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* @param string $entity Form's entity name for which paths will be added. |
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* @param mixed $new A path or array of paths to add. |
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* |
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* @return array The list of paths that have been added. |
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* |
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* @since 1.0 |
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*/ |
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protected static function addPath($entity, $new = null) |
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{ |
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// Reference to an array with paths for current entity |
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$paths = &self::$paths[$entity]; |
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// Add the default entity's search path if not set. |
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if (empty($paths)) |
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{ |
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// While we support limited number of entities (form, field and rule) |
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// we can do this simple pluralisation: |
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$entity_plural = $entity . 's'; |
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/* |
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* But when someday we would want to support more entities, then we should consider adding |
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* an inflector class to "libraries/joomla/utilities" and use it here (or somebody can use a real inflector in his subclass). |
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* See also: pluralization snippet by Paul Osman in JControllerForm's constructor. |
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*/ |
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$paths[] = __DIR__ . '/' . $entity; |
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} |
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// Force the new path(s) to an array. |
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settype($new, 'array'); |
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// Add the new paths to the stack if not already there. |
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foreach ($new as $path) |
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{ |
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if (!in_array($path, $paths)) |
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{ |
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array_unshift($paths, trim($path)); |
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} |
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if (!is_dir($path)) |
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{ |
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array_unshift($paths, trim($path)); |
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} |
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} |
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return $paths; |
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} |
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} |
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This method has been deprecated. The supplier of the class has supplied an explanatory message.
The explanatory message should give you some clue as to whether and when the method will be removed from the class and what other method or class to use instead.