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/** * Static array of Form's entity objects for re-use. * Prototypes for all fields and rules are here. * * Array's structure: * entities: * {ENTITY_NAME}: * {KEY}: {OBJECT} * * @var array * @since 11.1 */ protected static $entities = array('field' => array(), 'form' => array(), 'rule' => array()); /** * Method to load a form field object given a type. * * @param string $type The field type. * @param boolean $new Flag to toggle whether we should get a new instance of the object. * * @return FormField|boolean FormField object on success, false otherwise. * * @since 11.1 */ public static function loadFieldType($type, $new = true) { return self::loadType('field', $type, $new); } /** * Method to load a form rule object given a type. * * @param string $type The rule type. * @param boolean $new Flag to toggle whether we should get a new instance of the object. * * @return FormRule|boolean FormRule object on success, false otherwise. * * @since 11.1 */ public static function loadRuleType($type, $new = true) { return self::loadType('rule', $type, $new); } /** * Method to load a form entity object given a type. * Each type is loaded only once and then used as a prototype for other objects of same type. * Please, use this method only with those entities which support types (forms don't support them). * * @param string $entity The entity. * @param string $type The entity type. * @param boolean $new Flag to toggle whether we should get a new instance of the object. * * @return mixed Entity object on success, false otherwise. * * @since 11.1 */ protected static function loadType($entity, $type, $new = true) { // Reference to an array with current entity's type instances $types = &self::$entities[$entity]; $key = md5($type); // Return an entity object if it already exists and we don't need a new one. if (isset($types[$key]) && $new === false) { return $types[$key]; } $class = self::loadClass($entity, $type); if ($class === false) { return false; } // Instantiate a new type object. $types[$key] = new $class; return $types[$key]; } /** * Attempt to import the JFormField class file if it isn't already imported. * You can use this method outside of JForm for loading a field for inheritance or composition. * * @param string $type Type of a field whose class should be loaded. * * @return string|boolean Class name on success or false otherwise. * * @since 11.1 */ public static function loadFieldClass($type) { return self::loadClass('field', $type); } /** * Attempt to import the JFormRule class file if it isn't already imported. * You can use this method outside of JForm for loading a rule for inheritance or composition. * * @param string $type Type of a rule whose class should be loaded. * * @return string|boolean Class name on success or false otherwise. * * @since 11.1 */ public static function loadRuleClass($type) { return self::loadClass('rule', $type); } /** * Load a class for one of the form's entities of a particular type. * Currently, it makes sense to use this method for the "field" and "rule" entities * (but you can support more entities in your subclass). * * @param string $entity One of the form entities (field or rule). * @param string $type Type of an entity. * * @return string|boolean Class name on success or false otherwise. * * @since 11.1 */ protected static function loadClass($entity, $type) { // Check if there is a class in the registered namespaces foreach (self::addPrefix($entity) as $prefix) { // Treat underscores as namespace $name = Normalise::toSpaceSeparated($type); $name = str_ireplace(' ', '\\', ucwords($name)); // Compile the classname $class = rtrim($prefix, '\\') . '\\' . ucfirst($name) . ucfirst($entity); // Check if the class exists if (class_exists($class)) { return $class; } } $prefix = 'J'; if (strpos($type, '.')) { list($prefix, $type) = explode('.', $type); } $class = StringHelper::ucfirst($prefix, '_') . 'Form' . StringHelper::ucfirst($entity, '_') . StringHelper::ucfirst($type, '_'); if (class_exists($class)) { return $class; } // Get the field search path array. $paths = self::addPath($entity); // If the type is complex, add the base type to the paths. if ($pos = strpos($type, '_')) { // Add the complex type prefix to the paths. for ($i = 0, $n = count($paths); $i < $n; $i++) { // Derive the new path. $path = $paths[$i] . '/' . strtolower(substr($type, 0, $pos)); // If the path does not exist, add it. if (!in_array($path, $paths)) { $paths[] = $path; } } // Break off the end of the complex type. $type = substr($type, $pos + 1); } // Try to find the class file. $type = strtolower($type) . '.php'; foreach ($paths as $path) { $file = \JPath::find($path, $type); if (!$file) { continue; } require_once $file; if (class_exists($class)) { break; } } // Check for all if the class exists. return class_exists($class) ? $class : false; } /** * Method to add a path to the list of field include paths. * * @param mixed $new A path or array of paths to add. * * @return array The list of paths that have been added. * * @since 11.1 */ public static function addFieldPath($new = null) { return self::addPath('field', $new); } /** * Method to add a path to the list of form include paths. * * @param mixed $new A path or array of paths to add. * * @return array The list of paths that have been added. * * @since 11.1 */ public static function addFormPath($new = null) { return self::addPath('form', $new); } /** * Method to add a path to the list of rule include paths. * * @param mixed $new A path or array of paths to add. * * @return array The list of paths that have been added. * * @since 11.1 */ public static function addRulePath($new = null) { return self::addPath('rule', $new); } /** * Method to add a path to the list of include paths for one of the form's entities. * Currently supported entities: field, rule and form. You are free to support your own in a subclass. * * @param string $entity Form's entity name for which paths will be added. * @param mixed $new A path or array of paths to add. * * @return array The list of paths that have been added. * * @since 11.1 */ protected static function addPath($entity, $new = null) { // Reference to an array with paths for current entity $paths = &self::$paths[$entity]; // Add the default entity's search path if not set. if (empty($paths)) { // While we support limited number of entities (form, field and rule) // we can do this simple pluralisation: $entity_plural = $entity . 's'; /* * But when someday we would want to support more entities, then we should consider adding * an inflector class to "libraries/joomla/utilities" and use it here (or somebody can use a real inflector in his subclass). * See also: pluralization snippet by Paul Osman in JControllerForm's constructor. */ $paths[] = __DIR__ . '/' . $entity_plural; } // Force the new path(s) to an array. settype($new, 'array'); // Add the new paths to the stack if not already there. foreach ($new as $path) { if (!in_array($path, $paths)) { array_unshift($paths, trim($path)); } if (!is_dir($path)) { array_unshift($paths, trim($path)); } } return $paths; } /** * Method to add a namespace prefix to the list of field lookups. * * @param mixed $new A namespaces or array of namespaces to add. * * @return array The list of namespaces that have been added. * * @since 3.8.0 */ public static function addFieldPrefix($new = null) { return self::addPrefix('field', $new); } /** * Method to add a namespace to the list of form lookups. * * @param mixed $new A namespace or array of namespaces to add. * * @return array The list of namespaces that have been added. * * @since 3.8.0 */ public static function addFormPrefix($new = null) { return self::addPrefix('form', $new); } /** * Method to add a namespace to the list of rule lookups. * * @param mixed $new A namespace or array of namespaces to add. * * @return array The list of namespaces that have been added. * * @since 3.8.0 */ public static function addRulePrefix($new = null) { return self::addPrefix('rule', $new); } /** * Method to add a namespace to the list of namespaces for one of the form's entities. * Currently supported entities: field, rule and form. You are free to support your own in a subclass. * * @param string $entity Form's entity name for which paths will be added. * @param mixed $new A namespace or array of namespaces to add. * * @return array The list of namespaces that have been added. * * @since 3.8.0 */ protected static function addPrefix($entity, $new = null) { // Reference to an array with namespaces for current entity $prefixes = &self::$prefixes[$entity]; // Add the default entity's search namespace if not set. if (empty($prefixes)) { $prefixes[] = __NAMESPACE__ . '\\' . ucfirst($entity); } // Force the new namespace(s) to an array. settype($new, 'array'); // Add the new paths to the stack if not already there. foreach ($new as $prefix) { $prefix = trim($prefix); if (in_array($prefix, $prefixes)) { continue; } array_unshift($prefixes, $prefix); } return $prefixes; } /** * Parse the show on conditions * * @param string $showOn Show on conditions. * @param string $formControl Form name. * @param string $group The dot-separated form group path. * * @return array Array with show on conditions. * * @since 3.7.0 */ public static function parseShowOnConditions($showOn, $formControl = null, $group = null) { // Process the showon data. if (!$showOn) { return array(); } $formPath = $formControl ?: ''; if ($group) { $groups = explode('.', $group); // An empty formControl leads to invalid shown property // Use the 1st part of the group instead to avoid. if (empty($formPath) && isset($groups[0])) { $formPath = $groups[0]; array_shift($groups); } foreach ($groups as $group) { $formPath .= '[' . $group . ']'; } } $showOnData = array(); $showOnParts = preg_split('#(\[AND\]|\[OR\])#', $showOn, -1, PREG_SPLIT_DELIM_CAPTURE); $op = ''; foreach ($showOnParts as $showOnPart) { if (($showOnPart === '[AND]') || $showOnPart === '[OR]') { $op = trim($showOnPart, '[]'); continue; } $compareEqual = strpos($showOnPart, '!:') === false; $showOnPartBlocks = explode(($compareEqual ? ':' : '!:'), $showOnPart, 2); $showOnData[] = array( 'field' => $formPath ? $formPath . '[' . $showOnPartBlocks[0] . ']' : $showOnPartBlocks[0], 'values' => explode(',', $showOnPartBlocks[1]), 'sign' => $compareEqual === true ? '=' : '!=', 'op' => $op, ); if ($op !== '') { $op = ''; } } return $showOnData; } }