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<?php
/**
* Represents a file type which can be added to a form.
* Automatically tries to save has_one-relations on the saved
* record.
*
* Please set a validator on the form-object to get feedback
* about imposed filesize/extension restrictions.
*
* See {@link UploadField} For a more full-featured field
* (incl. ajax-friendly uploads, previews and relationship management).
*
* <b>Usage</p>
*
* If you want to implement a FileField into a form element, you need to pass it an array of source data.
*
* <code>
* class ExampleForm_Controller extends Page_Controller {
*
* function Form() {
* $fields = new FieldList(
* new TextField('MyName'),
* new FileField('MyFile')
* );
* $actions = new FieldList(
* new FormAction('doUpload', 'Upload file')
* );
* $validator = new RequiredFields(array('MyName', 'MyFile'));
*
* return new Form($this, 'Form', $fields, $actions, $validator);
* }
*
* function doUpload($data, $form) {
* $file = $data['MyFile'];
* $content = file_get_contents($file['tmp_name']);
* // ... process content
* }
* }
* </code>
*
* @package forms
* @subpackage fields-files
*/
class FileField extends FormField {
/**
* Flag to automatically determine and save a has_one-relationship
* on the saved record (e.g. a "Player" has_one "PlayerImage" would
* trigger saving the ID of newly created file into "PlayerImageID"
* on the record).
*
* @var boolean
*/
public $relationAutoSetting = true;
/**
* Upload object (needed for validation
* and actually moving the temporary file
* created by PHP).
*
* @var Upload
*/
protected $upload;
/**
* Partial filesystem path relative to /assets directory.
* Defaults to Upload::$uploads_folder.
*
* @var string
*/
protected $folderName = false;
/**
* Create a new file field.
*
* @param string $name The internal field name, passed to forms.
* @param string $title The field label.
* @param int $value The value of the field.
*/
public function __construct($name, $title = null, $value = null) {
$this->upload = Upload::create();
parent::__construct($name, $title, $value);
}
/**
* @param array $properties
* @return HTMLText
*/
public function Field($properties = array()) {
$properties = array_merge($properties, array(
'MaxFileSize' => $this->getValidator()->getAllowedMaxFileSize()
));
return parent::Field($properties);
}
public function getAttributes() {
return array_merge(
parent::getAttributes(),
array('type' => 'file')
);
}
public function saveInto(DataObjectInterface $record) {
if(!isset($_FILES[$this->name])) {
return false;
}
$fileClass = File::get_class_for_file_extension(
pathinfo($_FILES[$this->name]['name'], PATHINFO_EXTENSION)
);
if($this->relationAutoSetting) {
// assume that the file is connected via a has-one
$hasOnes = $record->hasOne($this->name);
// try to create a file matching the relation
$file = (is_string($hasOnes)) ? Object::create($hasOnes) : new $fileClass();
} else if($record instanceof File) {
$file = $record;
} else {
$file = new $fileClass();
}
$this->upload->loadIntoFile($_FILES[$this->name], $file, $this->getFolderName());
if($this->upload->isError()) {
return false;
}
if($this->relationAutoSetting) {
if(!$hasOnes) {
return false;
}
$file = $this->upload->getFile();
$record->{$this->name . 'ID'} = $file->ID;
}
return $this;
}
public function Value() {
return isset($_FILES[$this->getName()]) ? $_FILES[$this->getName()] : null;
}
/**
* Get custom validator for this field
*
* @param Upload_Validator $validator
*/
public function getValidator() {
return $this->upload->getValidator();
}
/**
* Set custom validator for this field
*
* @param Upload_Validator $validator
* @return FileField Self reference
*/
public function setValidator($validator) {
$this->upload->setValidator($validator);
return $this;
}
/**
* Sets the upload folder name
*
* @param string $folderName
* @return FileField Self reference
*/
public function setFolderName($folderName) {
$this->folderName = $folderName;
return $this;
}
/**
* Gets the upload folder name
*
* @return string
*/
public function getFolderName() {
return ($this->folderName !== false) ? $this->folderName : Config::inst()->get('Upload', 'uploads_folder');
}
public function validate($validator) {
if(!isset($_FILES[$this->name])) return true;
$tmpFile = $_FILES[$this->name];
$valid = $this->upload->validate($tmpFile);
if(!$valid) {
$errors = $this->upload->getErrors();
if($errors) foreach($errors as $error) {
$validator->validationError($this->name, $error, "validation", false);
}
return false;
}
return true;
}
/**
* Retrieves the Upload handler
*
* @return Upload
*/
public function getUpload() {
return $this->upload;
}
/**
* Sets the upload handler
*
* @param Upload $upload
* @return FileField Self reference
*/
public function setUpload(Upload $upload) {
$this->upload = $upload;
return $this;
}
/**
* Limit allowed file extensions. Empty by default, allowing all extensions.
* To allow files without an extension, use an empty string.
* See {@link File::$allowed_extensions} to get a good standard set of
* extensions that are typically not harmful in a webserver context.
* See {@link setAllowedMaxFileSize()} to limit file size by extension.
*
* @param array $rules List of extensions
* @return $this
*/
public function setAllowedExtensions($rules) {
$this->getValidator()->setAllowedExtensions($rules);
return $this;
}
/**
* Limit allowed file extensions by specifying categories of file types.
* These may be 'image', 'audio', 'mov', 'zip', 'flash', or 'doc'
* See {@link File::$allowed_extensions} for details of allowed extensions
* for each of these categories
*
* @param string $category Category name
* @param string,... $categories Additional category names
* @return $this
*/
public function setAllowedFileCategories($category) {
$extensions = array();
$knownCategories = File::config()->app_categories;
// Parse arguments
$categories = func_get_args();
if(func_num_args() === 1 && is_array(reset($categories))) {
$categories = reset($categories);
}
// Merge all categories into list of extensions
foreach(array_filter($categories) as $category) {
if(isset($knownCategories[$category])) {
$extensions = array_merge($extensions, $knownCategories[$category]);
} else {
user_error("Unknown file category: $category", E_USER_ERROR);
}
}
return $this->setAllowedExtensions($extensions);
}
/**
* Returns list of extensions allowed by this field, or an empty array
* if there is no restriction
*
* @return array
*/
public function getAllowedExtensions() {
return $this->getValidator()->getAllowedExtensions();
}
}
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