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package nl.pdok.catalogus;

import nl.pdok.catalogus.model.CatalogusEntry;

import java.io.File;
import java.io.IOException;

import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Created with IntelliJ IDEA.
 * User: nijhur
 * Date: 4-11-14
 * Time: 10:08
 * To change this template use File | Settings | File Templates.
 */
public class Catalogus {
    final static Logger logger = LoggerFactory.getLogger(Catalogus.class);

    private static String COMMONLOCATION = "pdok_common";
    private static String CONFIGURATION_FILE = "configuration.json";
    private static String SEPARATOR = File.separator;
    private static String SLD_FOLDER = "slds";
    private static String SLD_EXT = ".sld";
    
    private String catalogRoot;

    public Catalogus(String catalogRoot) {
    	this.catalogRoot = catalogRoot;
    }

    public CatalogusEntry getCatalogus(String serviceName){
        CatalogusEntry catalogus = null;
        ObjectMapper mapper = new ObjectMapper();
        try {
            File configFile = new File(catalogRoot + SEPARATOR + "datasets" + SEPARATOR + serviceName + SEPARATOR + CONFIGURATION_FILE);
            if (configFile.exists() ) {
                catalogus = mapper.readValue(configFile, CatalogusEntry.class);
            } else {
                logger.error("Config file does not exist in catalog: " + serviceName);
            }
        } catch (JsonMappingException e1) {
            logger.error("Error mapping catalog file: " + e1.getMessage());
            catalogus = null;
        } catch (JsonParseException e1) {
            logger.error("Error parsing catalog file: " + e1.getMessage());
            catalogus = null;
        } catch (IOException e1) {
            logger.error("Error reading catalog file: " + e1.getMessage());
            catalogus = null;
        }

        return catalogus;
    }


    public File getLocalStyle(String serviceName, String styleName){
        return getFile(catalogRoot + SEPARATOR + "datasets" + SEPARATOR + serviceName + SEPARATOR + SLD_FOLDER + SEPARATOR + styleName + SLD_EXT);
    }

    public File getCommonStyle(String styleName){
        return getFile(catalogRoot + SEPARATOR + COMMONLOCATION + SEPARATOR + SLD_FOLDER + SEPARATOR + styleName + SLD_EXT);
    }

    private File getFile(String location){
        File file = new File(location);
        return file.exists()?file:null;
    }
}