mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-08-26 20:45:47 +02:00
278 lines
6.8 KiB
PHP
278 lines
6.8 KiB
PHP
<?php
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/**
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* Represents a file type which can be added to a form.
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* Automatically tries to save has_one-relations on the saved
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* record.
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*
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* Please set a validator on the form-object to get feedback
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* about imposed filesize/extension restrictions.
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*
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* See {@link UploadField} For a more full-featured field
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* (incl. ajax-friendly uploads, previews and relationship management).
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*
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* <b>Usage</p>
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*
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* If you want to implement a FileField into a form element, you need to pass it an array of source data.
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*
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* <code>
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* class ExampleForm_Controller extends Page_Controller {
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*
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* function Form() {
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* $fields = new FieldList(
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* new TextField('MyName'),
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* new FileField('MyFile')
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* );
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* $actions = new FieldList(
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* new FormAction('doUpload', 'Upload file')
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* );
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* $validator = new RequiredFields(array('MyName', 'MyFile'));
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*
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* return new Form($this, 'Form', $fields, $actions, $validator);
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* }
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*
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* function doUpload($data, $form) {
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* $file = $data['MyFile'];
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* $content = file_get_contents($file['tmp_name']);
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* // ... process content
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* }
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* }
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* </code>
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*
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* @package forms
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* @subpackage fields-files
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*/
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class FileField extends FormField {
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/**
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* Flag to automatically determine and save a has_one-relationship
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* on the saved record (e.g. a "Player" has_one "PlayerImage" would
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* trigger saving the ID of newly created file into "PlayerImageID"
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* on the record).
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*
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* @var boolean
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*/
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public $relationAutoSetting = true;
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/**
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* Upload object (needed for validation
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* and actually moving the temporary file
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* created by PHP).
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*
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* @var Upload
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*/
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protected $upload;
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/**
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* Partial filesystem path relative to /assets directory.
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* Defaults to Upload::$uploads_folder.
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*
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* @var string
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*/
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protected $folderName = false;
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/**
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* Create a new file field.
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*
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* @param string $name The internal field name, passed to forms.
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* @param string $title The field label.
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* @param int $value The value of the field.
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*/
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public function __construct($name, $title = null, $value = null) {
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$this->upload = Upload::create();
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parent::__construct($name, $title, $value);
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}
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public function Field($properties = array()) {
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$properties = array_merge($properties, array(
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'MaxFileSize' => $this->getValidator()->getAllowedMaxFileSize()
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));
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return parent::Field($properties);
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}
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public function getAttributes() {
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return array_merge(
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parent::getAttributes(),
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array('type' => 'file')
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);
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}
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public function saveInto(DataObjectInterface $record) {
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if(!isset($_FILES[$this->name])) {
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return false;
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}
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$fileClass = File::get_class_for_file_extension(
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pathinfo($_FILES[$this->name]['name'], PATHINFO_EXTENSION)
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);
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if($this->relationAutoSetting) {
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// assume that the file is connected via a has-one
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$hasOnes = $record->has_one($this->name);
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// try to create a file matching the relation
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$file = (is_string($hasOnes)) ? Object::create($hasOnes) : new $fileClass();
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} else if($record instanceof File) {
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$file = $record;
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} else {
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$file = new $fileClass();
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}
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$this->upload->loadIntoFile($_FILES[$this->name], $file, $this->getFolderName());
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if($this->upload->isError()) {
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return false;
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}
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if($this->relationAutoSetting) {
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if(!$hasOnes) {
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return false;
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}
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$file = $this->upload->getFile();
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$record->{$this->name . 'ID'} = $file->ID;
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}
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return $this;
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}
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public function Value() {
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return isset($_FILES[$this->getName()]) ? $_FILES[$this->getName()] : null;
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}
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/**
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* Get custom validator for this field
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*
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* @param Upload_Validator $validator
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*/
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public function getValidator() {
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return $this->upload->getValidator();
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}
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/**
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* Set custom validator for this field
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*
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* @param Upload_Validator $validator
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* @return FileField Self reference
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*/
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public function setValidator($validator) {
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$this->upload->setValidator($validator);
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return $this;
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}
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/**
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* Sets the upload folder name
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*
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* @param string $folderName
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* @return FileField Self reference
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*/
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public function setFolderName($folderName) {
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$this->folderName = $folderName;
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return $this;
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}
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/**
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* Gets the upload folder name
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*
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* @return string
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*/
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public function getFolderName() {
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return ($this->folderName !== false) ? $this->folderName : Config::inst()->get('Upload', 'uploads_folder');
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}
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public function validate(Validator $validator) {
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if(!isset($_FILES[$this->name])) return true;
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$tmpFile = $_FILES[$this->name];
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$valid = $this->upload->validate($tmpFile);
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if(!$valid) {
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$errors = $this->upload->getErrors();
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if($errors) foreach($errors as $error) {
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$validator->validationError($this->name, $error, "validation", false);
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}
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return false;
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}
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return true;
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}
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/**
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* Retrieves the Upload handler
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*
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* @return Upload
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*/
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public function getUpload() {
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return $this->upload;
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}
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/**
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* Sets the upload handler
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*
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* @param Upload $upload
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* @return FileField Self reference
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*/
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public function setUpload(Upload $upload) {
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$this->upload = $upload;
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return $this;
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}
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/**
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* Limit allowed file extensions. Empty by default, allowing all extensions.
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* To allow files without an extension, use an empty string.
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* See {@link File::$allowed_extensions} to get a good standard set of
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* extensions that are typically not harmful in a webserver context.
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* See {@link setAllowedMaxFileSize()} to limit file size by extension.
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*
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* @param array $rules List of extensions
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* @return $this
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*/
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public function setAllowedExtensions($rules) {
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$this->getValidator()->setAllowedExtensions($rules);
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return $this;
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}
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/**
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* Limit allowed file extensions by specifying categories of file types.
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* These may be 'image', 'audio', 'mov', 'zip', 'flash', or 'doc'
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* See {@link File::$allowed_extensions} for details of allowed extensions
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* for each of these categories
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*
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* @param string $category Category name
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* @param string,... $categories Additional category names
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* @return $this
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*/
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public function setAllowedFileCategories($category) {
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$extensions = array();
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$knownCategories = File::config()->app_categories;
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// Parse arguments
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$categories = func_get_args();
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if(func_num_args() === 1 && is_array(reset($categories))) {
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$categories = reset($categories);
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}
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// Merge all categories into list of extensions
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foreach(array_filter($categories) as $category) {
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if(isset($knownCategories[$category])) {
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$extensions = array_merge($extensions, $knownCategories[$category]);
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} else {
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user_error("Unknown file category: $category", E_USER_ERROR);
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}
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}
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return $this->setAllowedExtensions($extensions);
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}
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/**
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* Returns list of extensions allowed by this field, or an empty array
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* if there is no restriction
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*
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* @return array
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*/
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public function getAllowedExtensions() {
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return $this->getValidator()->getAllowedExtensions();
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}
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}
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