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CloudConvert is an online file converter API - more than 200 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats supported.

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package com.cloudconvert.processor.response.successful;

import com.cloudconvert.client.mapper.ObjectMapperProvider;
import com.cloudconvert.dto.result.Result;
import com.cloudconvert.processor.content.ContentPreProcessor;
import com.cloudconvert.processor.content.DataExtractingContentPreProcessor;
import com.cloudconvert.processor.content.DefaultContentPreProcessor;
import com.cloudconvert.processor.response.ResponseProcessor;
import com.cloudconvert.resource.AbstractResource;
import com.fasterxml.jackson.core.type.TypeReference;
import com.google.common.collect.ImmutableMap;
import org.apache.http.Header;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Map;
import java.util.stream.Collectors;

public class ContentResponseProcessor implements ResponseProcessor {

    private final ObjectMapperProvider objectMapperProvider;

    private final ContentPreProcessor defaultContentPreProcessor;
    private final Map, ContentPreProcessor> contentPreProcessors;

    public ContentResponseProcessor(final ObjectMapperProvider objectMapperProvider) {
        this.objectMapperProvider = objectMapperProvider;

        final ContentPreProcessor dataExtractionContentPreProcessor = new DataExtractingContentPreProcessor();

        this.defaultContentPreProcessor = new DefaultContentPreProcessor();
        this.contentPreProcessors = ImmutableMap., ContentPreProcessor>builder()
            .put(AbstractResource.TASK_RESPONSE_TYPE_REFERENCE, dataExtractionContentPreProcessor)
            .put(AbstractResource.JOB_RESPONSE_TYPE_REFERENCE, dataExtractionContentPreProcessor)
            .put(AbstractResource.USER_RESPONSE_TYPE_REFERENCE, dataExtractionContentPreProcessor)
            .put(AbstractResource.WEBHOOKS_RESPONSE_TYPE_REFERENCE, dataExtractionContentPreProcessor).build();
    }

    @Override
    public  Result process(
        final int status, final Header[] headers, final InputStream inputStream, final TypeReference typeReference
    ) throws IOException {
        final String string = contentPreProcessors.getOrDefault(typeReference, defaultContentPreProcessor).preProcess(inputStream);

        return Result.builder().status(status).headers(Arrays.stream(headers).collect(Collectors.toMap(Header::getName, Header::getValue, (v1, v2) -> v1 + ", " + v2)))
            .message("").body(objectMapperProvider.provide().readValue(string, typeReference)).build();
    }
}