de.gematik.refv.Plugin Maven / Gradle / Ivy

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/*
Copyright (c) 2022-2024 gematik GmbH

Licensed under the Apache License, Version 2.0 (the License);
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an 'AS IS' BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package de.gematik.refv;

import lombok.NonNull;
import lombok.SneakyThrows;
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;
import org.yaml.snakeyaml.Yaml;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.zip.ZipFile;

public class Plugin {
    private static final String CONFIG_FILE = "config.yaml";
    private final ZipFile zipFile;

    private Plugin(ZipFile zipFile) {
        this.zipFile = zipFile;
    }

    @SneakyThrows
    public String getId() {
        try(InputStream packagesConfigFile = getResource(CONFIG_FILE)) {
            Yaml yaml = new Yaml();
            Map document = yaml.load(packagesConfigFile);
            return document.get("id").toString();
        } finally {
            zipFile.close();
        }
    }

    public static Plugin createFromZipFile(@NonNull ZipFile zipFile) {
        return new Plugin(zipFile);
    }

    @SneakyThrows
    public InputStream getResource(@NonNull String path) {
        try (InputStream is = new FileInputStream(zipFile.getName());
             ZipArchiveInputStream zipInputStream = new ZipArchiveInputStream(is)) {
            ZipArchiveEntry entry;
            while ((entry = zipInputStream.getNextEntry()) != null) {
                if (entry.getName().contains(path)) {
                    return createEntryInputStream(zipInputStream);
                }
            }
        } finally {
            zipFile.close();
        }
        return null;
    }

    private InputStream createEntryInputStream(@NonNull ZipArchiveInputStream zipInputStream) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int bytesRead;
        while ((bytesRead = zipInputStream.read(buffer)) != -1) {
            baos.write(buffer, 0, bytesRead);
        }
        return new ByteArrayInputStream(baos.toByteArray());
    }
}