/**
* Save a new media file and attach it to a specific model. The newFiles
* attribute of the model must be set tp an instance of UploadedFile.
*
* Example:
* $model = new SomeModel();
* $model->newFiles = UploadedFile::getInstances($model, 'newFiles');
* if($model->newFiles)
* {
* $this->saveMediafiles($model);
* }
*
* @param model the model to attach the file(s) to. The newFiles attribute of
* the model must be set, otherwise nothing happens
* @param saveAsPng if true, images will be saved as png (this is the
* default)
* @return whether saving succeeded or not
*/
public function saveMediafiles($model, $saveAsPng = TRUE)
{
if (!$model->newFiles) {
return FALSE;
}
// We need this in the converter below.
$pngType = Mediafiletype::findOne(['mimetype' => 'image/png']);
$mediafiles = [];
// First validate the new files. If the new files are not valid,
// abort.
foreach ($model->newFiles as $newFile) {
$mediafileType = Mediafiletype::findOne(['mimetype' => $newFile->type]);
// Mime type detection does not always work flawlessly. If no mime
// type is supplied, check if we recognize the file extension.
if (!$mediafileType) {
$mediafileType = Mediafiletype::findOne(['extension' => $newFile->extension]);
}
if (!$mediafileType) {
throw new HttpException(500, 'Unknown media file type: ' . $newFile->type);
}
$mediafile = new Mediafile();
$mediafile->mediafiletypeid = $mediafileType->id;
$mediafile->title = $newFile;
$mediafile->file = $newFile;
if (!$mediafile->validate()) {
return FALSE;
}
$mediafiles[] = $mediafile;
}
// If we're still here, all media files were ok. Save them.
foreach ($mediafiles as $mediafile) {
// Create the directory if it does not exist yet.
$directory = preg_replace('/\\/[^\\/]+$/', '', $mediafile->filePath);
if (!file_exists($directory)) {
$success = @mkdir($directory, 0755, true);
if (!$success) {
Yii::error("Unable to create directory {$directory}");
throw new HttpException(500, "Unable to create directory for file upload.");
}
}
// Convert all images to PNG if requested and save the data to disk.
if (preg_match('/^image\\//', $mediafile->file->type) && $saveAsPng) {
$converter = new ImageToPngConverter();
$converter->setPath($mediafile->file->tempName);
$converter->setType($mediafile->file->type);
$converter->convert();
$fileHandle = @fopen($mediafile->filePath, 'w');
if (!$fileHandle) {
throw new Exception("Unable to save file data to " . $this->filePath);
}
if (false === fwrite($fileHandle, $converter->getPngData())) {
throw new Exception("Unable to write file data to " . $this->filePath);
}
$mediafile->mediafiletypeid = $pngType->primaryKey;
} else {
if (!copy($mediafile->file->tempName, $mediafile->filePath)) {
Yii::error("Unable to write to file " . $mediafile->getFilePath);
throw new HttpException(500, "Unable to copy uploaded file to destination.");
}
}
@chmod($mediafile->filePath, 0755);
$mediafile->save();
$model->addMediafile($mediafile);
}
unset($model->newFiles);
return TRUE;
}
