SilverStripe UploadField file auto renaming - php

Question

I have made a form on the front end to upload some images. My idea is to automatically rename all files uploaded into unique id's.
I have looked at the SilverStripe API and I do not see anything about that. UploadField API
Is this possible?

Answer 1

Here is my solution bellow, in Silverstripe 3.X we must extend UploadField with another class. Then copy the ''saveTemporaryFile'' function into it.
Just before ''try'', just have to add :
$ext = array_reverse(explode('.',$tmpFile['name'])); // explode filename into array, reverse array, first array key will then be file extension
$tmpFile['name'] = hash_hmac('sha256', $tmpFile['name'], '12345') . '.' . $ext[0];
Results :
class RandomNameUploadField extends UploadField {
protected function saveTemporaryFile($tmpFile, &$error = null) {
// Determine container object
$error = null;
$fileObject = null;
if (empty($tmpFile)) {
$error = _t('UploadField.FIELDNOTSET', 'File information not found');
return null;
}
if($tmpFile['error']) {
$error = $tmpFile['error'];
return null;
}
// Search for relations that can hold the uploaded files, but don't fallback
// to default if there is no automatic relation
if ($relationClass = $this->getRelationAutosetClass(null)) {
// Create new object explicitly. Otherwise rely on Upload::load to choose the class.
$fileObject = Object::create($relationClass);
}
$ext = array_reverse(explode('.',$tmpFile['name'])); // explode filename into array, reverse array, first array key will then be file extension
$tmpFile['name'] = hash_hmac('sha256', $tmpFile['name'], '12345') . '.' . $ext[0];
// Get the uploaded file into a new file object.
try {
$this->upload->loadIntoFile($tmpFile, $fileObject, $this->getFolderName());
} catch (Exception $e) {
// we shouldn't get an error here, but just in case
$error = $e->getMessage();
return null;
}
// Check if upload field has an error
if ($this->upload->isError()) {
$error = implode(' ' . PHP_EOL, $this->upload->getErrors());
return null;
}
// return file
return $this->upload->getFile();
}
}
Thanks #3dgoo to give me a part of the solution!

Answer 2

I don't now about a API but with some code I was able to do that.
You have two possibilities.
First using database.
Second using only code:
$directory = '/teste/www/fotos/';
$files = glob($directory . '*.jpg');
if ( $files !== false )
{
$filecount = count( $files );
$newid = $filecount+1;
$new_name = "foto_".$newid;
$target_file = $directory."/".$new_name;
move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file);
}
else
{
$new_name = "foto_1";
$target_file = $directory."/".$new_name;
move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file);
}
My example is for jpeg but you can look for hall types.