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File ingestion from remote URLs.

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package org.molgenis.file.ingest.execution;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UncheckedIOException;
import java.net.URL;
import org.molgenis.data.file.FileStore;
import org.springframework.stereotype.Component;

/** Downloads a file from a URL to the {@link FileStore} */
@Component
public class FileStoreDownloadImpl implements FileStoreDownload {
  private final FileStore fileStore;

  public FileStoreDownloadImpl(FileStore fileStore) {
    this.fileStore = fileStore;
  }

  @Override
  public File downloadFile(String url, String folderName, String fileName) {
    try {
      File folder = new File(fileStore.getStorageDir(), folderName);
      folder.mkdir();

      try (InputStream in = new URL(url).openStream()) {
        String filename = folderName + '/' + fileName;
        return fileStore.store(in, filename);
      }
    } catch (IOException e) {
      throw new UncheckedIOException(e);
    }
  }
}