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<?php |
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/*This project's namespace structure is leveraged to autoload requested classes at runtime.*/ |
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function PFBC_Load($class) { |
| 4 |
$file = dirname(__FILE__) . "/" . str_replace("_", DIRECTORY_SEPARATOR, $class) . ".php"; |
| 5 |
if(is_file($file)) |
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include_once $file; |
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} |
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spl_autoload_register("PFBC_Load"); |
| 9 |
if(in_array("__autoload",spl_autoload_functions())) |
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spl_autoload_register("__autoload"); |
| 11 |
|
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class Form extends Base { |
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protected $elements = array(); |
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protected $prefix = "http"; |
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protected $values = array(); |
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protected $widthSuffix = "px"; |
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|
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protected $ajax; |
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protected $ajaxCallback; |
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protected $attributes; |
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protected $error; |
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/*jQueryUI themes can be previewed at http://jqueryui.com/themeroller/.*/ |
| 23 |
protected $jQueryUITheme = "smoothness"; |
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protected $resourcesPath; |
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/*Prevents various automated from being automatically applied. Current options for this array |
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included jQuery, jQueryUI, jQueryUIButtons, focus, and style.*/ |
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protected $prevent = array(); |
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protected $view; |
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protected $width; |
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|
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public function __construct($id = "pfbc", $width = "") { |
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$this->configure(array( |
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"width" => $width, |
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"action" => basename($_SERVER["SCRIPT_NAME"]), |
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"id" => preg_replace("/\W/", "-", $id), |
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"method" => "post" |
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)); |
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|
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if(isset($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] == "on") |
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$this->prefix = "https"; |
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|
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/*The Standard view class is applied by default and will be used unless a different view is |
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specified in the form's configure method*/ |
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if(empty($this->view)) |
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$this->view = new View_Standard; |
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|
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if(empty($this->error)) |
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$this->error = new Error_Standard; |
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|
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/*The resourcePath property is used to identify where third-party resources needed by the |
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project are located. This property will automatically be set properly if the PFBC directory |
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is uploaded within the server's document root. If symbolic links are used to reference the PFBC |
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directory, you may need to set this property in the form's configure method or directly in this |
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constructor.*/ |
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$path = dirname(__FILE__) . "/Resources"; |
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if(strpos($path, $_SERVER["DOCUMENT_ROOT"]) !== false) |
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$this->resourcesPath = substr($path, strlen($_SERVER["DOCUMENT_ROOT"])); |
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else |
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$this->resourcesPath = "/PFBC/Resources"; |
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} |
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|
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/*When a form is serialized and stored in the session, this function prevents any non-essential |
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information from being included.*/ |
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public function __sleep() { |
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return array("attributes", "elements", "error"); |
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} |
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|
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public function addElement(Element $element) { |
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$element->setForm($this); |
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//If the element doesn't have a specified id, a generic identifier is applied. |
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$id = $element->getID(); |
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if(empty($id)) |
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$element->setID($this->attributes["id"] . "-element-" . sizeof($this->elements)); |
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$this->elements[] = $element; |
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|
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/*For ease-of-use, the form tag's encytype attribute is automatically set if the File element |
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class is added.*/ |
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if($element instanceof Element_File) |
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$this->attributes["enctype"] = "multipart/form-data"; |
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} |
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|
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/*Values that have been set through the setValues method, either manually by the developer |
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or after validation errors, are applied to elements within this method.*/ |
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protected function applyValues() { |
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foreach($this->elements as $element) { |
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$name = $element->getName(); |
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if(isset($this->values[$name])) |
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$element->setValue($this->values[$name]); |
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elseif(substr($name, -2) == "[]" && isset($this->values[substr($name, 0, -2)])) |
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$element->setValue($this->values[substr($name, 0, -2)]); |
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} |
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} |
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|
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public static function clearErrors($id = "pfbc") { |
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if(!empty($_SESSION["pfbc"][$id]["errors"])) |
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unset($_SESSION["pfbc"][$id]["errors"]); |
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} |
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|
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public static function clearValues($id = "pfbc") { |
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if(!empty($_SESSION["pfbc"][$id]["values"])) |
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unset($_SESSION["pfbc"][$id]["values"]); |
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} |
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|
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/*This method parses the form's width property into a numeric width value and a width suffix - either px or %. |
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These values are used by the form's concrete view class.*/ |
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public function formatWidthProperties() { |
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if(!empty($this->width)) { |
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if(substr($this->width, -1) == "%") { |
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$this->width = substr($this->width, 0, -1); |
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$this->widthSuffix = "%"; |
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} |
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elseif(substr($this->width, -2) == "px") |
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$this->width = substr($this->width, 0, -2); |
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} |
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else { |
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/*If the form's width property is empty, 100% will be assumed.*/ |
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$this->width = 100; |
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$this->widthSuffix = "%"; |
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} |
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} |
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|
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public function getAjax() { |
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return $this->ajax; |
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} |
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|
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public function getElements() { |
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return $this->elements; |
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} |
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|
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public function getError() { |
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return $this->error; |
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} |
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|
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public function getId() { |
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return $this->attributes["id"]; |
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} |
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|
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public function getJQueryUIButtons() { |
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return $this->jQueryUIButtons; |
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} |
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|
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public function getPrevent() { |
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return $this->prevent; |
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} |
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|
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public function getResourcesPath() { |
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return $this->resourcesPath; |
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} |
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|
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public function getErrors() { |
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$errors = array(); |
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if(session_id() == "") |
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$errors[""] = array("Error: The pfbc project requires an active session to function properly. Simply add session_start() to your script before any output has been sent to the browser."); |
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else { |
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$errors = array(); |
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$id = $this->attributes["id"]; |
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if(!empty($_SESSION["pfbc"][$id]["errors"])) |
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$errors = $_SESSION["pfbc"][$id]["errors"]; |
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} |
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|
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return $errors; |
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} |
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|
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public static function getSessionValues($id = "pfbc") { |
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$values = array(); |
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if(!empty($_SESSION["pfbc"][$id]["values"])) |
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$values = $_SESSION["pfbc"][$id]["values"]; |
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return $values; |
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} |
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|
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public function getWidth() { |
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return $this->width; |
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} |
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|
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public function getWidthSuffix() { |
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return $this->widthSuffix; |
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} |
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|
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public static function isValid($id = "pfbc", $clearValues = true) { |
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$valid = true; |
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/*The form's instance is recovered (unserialized) from the session.*/ |
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$form = self::recover($id); |
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if(!empty($form)) { |
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if($_SERVER["REQUEST_METHOD"] == "POST") |
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$data = $_POST; |
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else |
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$data = $_GET; |
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|
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/*Any values/errors stored in the session for this form are cleared.*/ |
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self::clearValues($id); |
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self::clearErrors($id); |
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|
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/*Each element's value is saved in the session and checked against any validation rules applied |
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to the element.*/ |
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if(!empty($form->elements)) { |
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foreach($form->elements as $element) { |
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$name = $element->getName(); |
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if(substr($name, -2) == "[]") |
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$name = substr($name, 0, -2); |
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|
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/*The File element must be handled differently b/c it uses the $_FILES superglobal and |
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not $_GET or $_POST.*/ |
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if($element instanceof Element_File) |
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$data[$name] = $_FILES[$name]["name"]; |
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|
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if(isset($data[$name])) { |
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$value = $data[$name]; |
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if(is_array($value)) { |
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$valueSize = sizeof($value); |
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for($v = 0; $v < $valueSize; ++$v) |
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$value[$v] = stripslashes($value[$v]); |
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} |
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else |
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$value = stripslashes($value); |
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self::setSessionValue($id, $name, $value); |
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} |
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else |
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$value = null; |
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|
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/*If a validation error is found, the error message is saved in the session along with |
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the element's name.*/ |
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if(!$element->isValid($value)) { |
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self::setError($id, $element->getErrors(), $name); |
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$valid = false; |
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} |
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} |
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} |
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|
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/*If no validation errors were found, the form's session values are cleared.*/ |
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if($valid) { |
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if($clearValues) |
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self::clearValues($id); |
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self::clearErrors($id); |
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} |
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} |
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else |
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$valid = false; |
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|
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return $valid; |
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} |
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|
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/*This method restores the serialized form instance.*/ |
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protected static function recover($id) { |
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if(!empty($_SESSION["pfbc"][$id]["form"])) |
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return unserialize($_SESSION["pfbc"][$id]["form"]); |
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else |
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return ""; |
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} |
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|
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public function render($returnHTML = false) { |
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$this->view->setForm($this); |
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$this->error->setForm($this); |
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|
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/*When validation errors occur, the form's submitted values are saved in a session |
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array, which allows them to be pre-populated when the user is redirected to the form.*/ |
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$values = self::getSessionValues($this->attributes["id"]); |
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if(!empty($values)) |
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$this->setValues($values); |
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$this->applyValues(); |
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|
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$this->formatWidthProperties(); |
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|
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if($returnHTML) |
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ob_start(); |
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|
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$this->renderCSS(); |
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$this->view->render(); |
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$this->renderJS(); |
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|
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/*The form's instance is serialized and saved in a session variable for use during validation.*/ |
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$this->save(); |
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|
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if($returnHTML) { |
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$html = ob_get_contents(); |
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ob_end_clean(); |
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return $html; |
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} |
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} |
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|
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/*When ajax is used to submit the form's data, validation errors need to be manually sent back to the |
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form using json.*/ |
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public static function renderAjaxErrorResponse($id = "pfbc") { |
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$form = self::recover($id); |
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if(!empty($form)) |
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$form->error->renderAjaxErrorResponse(); |
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} |
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|
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protected function renderCSS() { |
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$this->renderCSSFiles(); |
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|
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echo '<style type="text/css">'; |
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$this->view->renderCSS(); |
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$this->error->renderCSS(); |
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foreach($this->elements as $element) |
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$element->renderCSS(); |
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echo '</style>'; |
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} |
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|
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protected function renderCSSFiles() { |
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$urls = array(); |
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if(!in_array("jQueryUI", $this->prevent)) |
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$urls[] = $this->prefix . "://ajax.googleapis.com/ajax/libs/jqueryui/1/themes/" . $this->jQueryUITheme . "/jquery-ui.css"; |
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foreach($this->elements as $element) { |
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$elementUrls = $element->getCSSFiles(); |
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if(is_array($elementUrls)) |
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$urls = array_merge($urls, $elementUrls); |
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} |
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|
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/*This section prevents duplicate css files from being loaded.*/ |
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if(!empty($urls)) { |
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$urls = array_values(array_unique($urls)); |
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foreach($urls as $url) |
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echo '<link type="text/css" rel="stylesheet" href="', $url, '"/>'; |
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} |
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} |
| 316 |
|
| 317 |
protected function renderJS() { |
| 318 |
$this->renderJSFiles(); |
| 319 |
|
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echo '<script type="text/javascript">'; |
| 321 |
$this->view->renderJS(); |
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foreach($this->elements as $element) |
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$element->renderJS(); |
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|
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$id = $this->attributes["id"]; |
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|
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echo 'jQuery(document).ready(function() {'; |
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|
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/*When the form is submitted, disable all submit buttons to prevent duplicate submissions.*/ |
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echo 'jQuery("#', $id, '").bind("submit", function() {'; |
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if(!in_array("jQueryUIButtons", $this->prevent)) { |
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echo 'jQuery(this).find("button[type=submit]").button("disable");'; |
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echo 'jQuery(this).find("button[type=submit] span.ui-button-text").css("padding-right", "2.1em").append("<img class=\"pfbc-loading\" src=\"', $this->resourcesPath, '/loading.gif\"/>");'; |
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} |
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else |
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echo 'jQuery(this).find("button[type=submit]").attr("disabled", "disabled");'; |
| 337 |
echo '});'; |
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|
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/*jQuery is used to set the focus of the form's initial element.*/ |
| 340 |
if(!in_array("focus", $this->prevent)) |
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echo 'jQuery("#', $id, ' :input:visible:enabled:first").focus();'; |
| 342 |
|
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$this->view->jQueryDocumentReady(); |
| 344 |
foreach($this->elements as $element) |
| 345 |
$element->jQueryDocumentReady(); |
| 346 |
|
| 347 |
/*For ajax, an anonymous onsubmit javascript function is bound to the form using jQuery. jQuery's |
| 348 |
serialize function is used to grab each element's name/value pair.*/ |
| 349 |
if(!empty($this->ajax)) { |
| 350 |
echo 'jQuery("#', $id, '").bind("submit", function() {'; |
| 351 |
$this->error->clear(); |
| 352 |
echo <<<JS |
| 353 |
jQuery.ajax({ |
| 354 |
url: "{$this->attributes["action"]}", |
| 355 |
type: "{$this->attributes["method"]}", |
| 356 |
data: jQuery("#$id").serialize(), |
| 357 |
success: function(response) { |
| 358 |
if(response != undefined && typeof response == "object" && response.errors) { |
| 359 |
JS; |
| 360 |
$this->error->applyAjaxErrorResponse(); |
| 361 |
echo <<<JS |
| 362 |
jQuery("html, body").animate({ scrollTop: jQuery("#$id").offset().top }, 500 ); |
| 363 |
} |
| 364 |
else { |
| 365 |
JS; |
| 366 |
/*A callback function can be specified to handle any post submission events.*/ |
| 367 |
if(!empty($this->ajaxCallback)) |
| 368 |
echo $this->ajaxCallback, "(response);"; |
| 369 |
|
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echo '}'; |
| 371 |
|
| 372 |
if(!in_array("jQueryUIButtons", $this->prevent)) { |
| 373 |
echo 'jQuery("#', $id, ' button[type=submit] span.ui-button-text").css("padding-right", "1em").find("img").remove();'; |
| 374 |
echo 'jQuery("#', $id, ' button[type=submit]").button("enable");'; |
| 375 |
} |
| 376 |
else |
| 377 |
echo 'jQuery("#', $id, '").find("button[type=submit]").removeAttr("disabled");'; |
| 378 |
|
| 379 |
echo <<<JS |
| 380 |
} |
| 381 |
}); |
| 382 |
return false; |
| 383 |
}); |
| 384 |
|
| 385 |
JS; |
| 386 |
} |
| 387 |
|
| 388 |
echo <<<JS |
| 389 |
}); |
| 390 |
</script> |
| 391 |
JS; |
| 392 |
} |
| 393 |
|
| 394 |
protected function renderJSFiles() { |
| 395 |
$urls = array(); |
| 396 |
if(!in_array("jQuery", $this->prevent)) |
| 397 |
$urls[] = $this->prefix . "://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"; |
| 398 |
if(!in_array("jQueryUI", $this->prevent)) |
| 399 |
$urls[] = $this->prefix . "://ajax.googleapis.com/ajax/libs/jqueryui/1/jquery-ui.min.js"; |
| 400 |
foreach($this->elements as $element) { |
| 401 |
$elementUrls = $element->getJSFiles(); |
| 402 |
if(is_array($elementUrls)) |
| 403 |
$urls = array_merge($urls, $elementUrls); |
| 404 |
} |
| 405 |
|
| 406 |
/*This section prevents duplicate css files from being loaded.*/ |
| 407 |
if(!empty($urls)) { |
| 408 |
$urls = array_values(array_unique($urls)); |
| 409 |
foreach($urls as $url) |
| 410 |
echo '<script type="text/javascript" src="', $url, '"></script>'; |
| 411 |
} |
| 412 |
} |
| 413 |
|
| 414 |
/*The save method serialized the form's instance and saves it in the session.*/ |
| 415 |
protected function save() { |
| 416 |
$_SESSION["pfbc"][$this->attributes["id"]]["form"] = serialize($this); |
| 417 |
} |
| 418 |
|
| 419 |
/*Valldation errors are saved in the session after the form submission, and will be displayed to the user |
| 420 |
when redirected back to the form.*/ |
| 421 |
public static function setError($id, $errors, $element = "") { |
| 422 |
if(!is_array($errors)) |
| 423 |
$errors = array($errors); |
| 424 |
if(empty($_SESSION["pfbc"][$id]["errors"][$element])) |
| 425 |
$_SESSION["pfbc"][$id]["errors"][$element] = array(); |
| 426 |
|
| 427 |
foreach($errors as $error) |
| 428 |
$_SESSION["pfbc"][$id]["errors"][$element][] = $error; |
| 429 |
} |
| 430 |
|
| 431 |
public static function setSessionValue($id, $element, $value) { |
| 432 |
$_SESSION["pfbc"][$id]["values"][$element] = $value; |
| 433 |
} |
| 434 |
|
| 435 |
/*An associative array is used to pre-populate form elements. The keys of this array correspond with |
| 436 |
the element names.*/ |
| 437 |
public function setValues(array $values) { |
| 438 |
$this->values = array_merge($this->values, $values); |
| 439 |
} |
| 440 |
} |
| 441 |
|
