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package liquibase.dbdoc;

import liquibase.GlobalConfiguration;
import liquibase.resource.ResourceAccessor;
import liquibase.util.StreamUtil;

import java.io.*;

public class ChangeLogWriter {
    protected File outputDir;
    private ResourceAccessor resourceAccessor;
    
    public ChangeLogWriter(ResourceAccessor resourceAccessor, File rootOutputDir) {
        this.outputDir = new File(rootOutputDir, "changelogs");
        this.resourceAccessor = resourceAccessor;
    }
    
    public void writeChangeLog(String changeLog, String physicalFilePath) throws IOException {
        String changeLogOutFile = changeLog.replace(":", "_");
        File xmlFile = new File(outputDir, changeLogOutFile.toLowerCase() + ".html");
        xmlFile.getParentFile().mkdirs();
        
        BufferedWriter changeLogStream = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(xmlFile,
        false), GlobalConfiguration.OUTPUT_FILE_ENCODING.getCurrentValue()));
        try (InputStream stylesheet = resourceAccessor.openStream(null, physicalFilePath)) {
            if (stylesheet == null) {
                throw new IOException("Can not find " + changeLog);
            }
            changeLogStream.write("\n");
            changeLogStream.write(StreamUtil.readStreamAsString(stylesheet).replace("<", "<").replace(">", ">"));
            changeLogStream.write("\n");
        } finally {
            changeLogStream.close();
        }
    }
}