file-transformer-rda-json/core/src/main/java/eu/eudat/file/transformer/executor/RdaFileTransformer.java

package eu.eudat.file.transformer.executor;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import eu.eudat.file.transformer.interfaces.FileTransformerClient;
import eu.eudat.file.transformer.interfaces.FileTransformerConfiguration;
import eu.eudat.file.transformer.models.description.DescriptionFileTransformerModel;
import eu.eudat.file.transformer.models.dmp.DmpFileTransformerModel;
import eu.eudat.file.transformer.models.misc.FileEnvelope;
import eu.eudat.file.transformer.models.misc.FileFormat;
import eu.eudat.file.transformer.rda.Dataset;
import eu.eudat.file.transformer.rda.Dmp;
import eu.eudat.file.transformer.rda.RDAModel;
import eu.eudat.file.transformer.rda.mapper.DatasetRDAMapper;
import eu.eudat.file.transformer.rda.mapper.DmpRDAMapper;
import eu.eudat.file.transformer.utils.service.storage.FileStorageService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.management.InvalidApplicationException;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.List;

@Service
public class RdaFileTransformer implements FileTransformerClient {

    private final DmpRDAMapper dmpRDAMapper;
    private final DatasetRDAMapper descriptionRDAMapper;
    private final ObjectMapper mapper;
    private final FileStorageService fileStorageService;

    @Autowired
    public RdaFileTransformer(DmpRDAMapper dmpRDAMapper, DatasetRDAMapper descriptionRDAMapper, FileStorageService fileStorageService) {
        this.dmpRDAMapper = dmpRDAMapper;
        this.descriptionRDAMapper = descriptionRDAMapper;
        this.fileStorageService = fileStorageService;
        mapper = new ObjectMapper();
        mapper.registerModule(new JavaTimeModule());
        mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
    }
    @Override
    public FileEnvelope exportDmp(DmpFileTransformerModel dmpFileTransformerModel) throws InvalidApplicationException, IOException {
        Dmp dmp = this.dmpRDAMapper.toRDA(dmpFileTransformerModel);
        RDAModel rdaModel = new RDAModel();
        rdaModel.setDmp(dmp);
        String dmpJson = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(rdaModel);
        FileEnvelope result = new FileEnvelope();
        result.setFilename(dmpFileTransformerModel.getLabel() + ".json");
        result.setFile(this.fileStorageService.storeFile(dmpJson.getBytes(StandardCharsets.UTF_8)));
        return result;
    }

    @Override
    public FileEnvelope exportDescription(DescriptionFileTransformerModel descriptionFileTransformerModel, String format) throws InvalidApplicationException, IOException {
        Dataset dataset = this.descriptionRDAMapper.toRDA(descriptionFileTransformerModel, this.dmpRDAMapper.toRDA(descriptionFileTransformerModel.getDmp()));
        String dmpJson = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(dataset);
        FileEnvelope result = new FileEnvelope();
        result.setFilename(descriptionFileTransformerModel.getLabel() + ".json");
        result.setFile(this.fileStorageService.storeFile(dmpJson.getBytes(StandardCharsets.UTF_8)));
        return result;
    }

    @Override
    public DmpFileTransformerModel importDmp(FileEnvelope fileEnvelope) {
        /*try { //TODO
            String jsonString = String.valueOf(this.fileStorageService.readFile(fileEnvelope.getFile()));
            RDAModel rda = mapper.readValue(jsonString, RDAModel.class);
            DmpFileTransformerModel model = this.dmpRDAMapper.toEntity(rda.getDmp(), )
        } catch (JsonProcessingException e) {

        }*/
        return null;
    }

    @Override
    public DescriptionFileTransformerModel importDescription(FileEnvelope fileEnvelope) {
        return null;
    }

    @Override
    public FileTransformerConfiguration getConfiguration() {
        List<FileFormat> supportedFormats = List.of(new FileFormat("json", false, null));
        FileTransformerConfiguration configuration = new FileTransformerConfiguration();
        configuration.setFileTransformerId("json");
        configuration.setExportVariants(supportedFormats);
        configuration.setImportVariants(supportedFormats);
        return configuration;
    }
}