package pt.ist.renderers.servlets.json;

import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class JsonObject {

    private Map<String, String> properties;

    public static final String OID_KEY = "oid";
    public static final String DESCRIPTION_KEY = "description";

    public JsonObject() {
	properties = new HashMap<String, String>();
    }

    public JsonObject(String oid, String description) {
	this();
	addAttribute(OID_KEY, oid);
	addAttribute(DESCRIPTION_KEY, description);
    }

    public void addAttribute(String key, String value) {
	properties.put(key, escape(value));
    }

    private String escape(String value) {
	return value.replaceAll("\"", "\\\\\"");
    }

    public String getJsonString() {
	StringBuilder builder = new StringBuilder("{");
	Iterator<String> iterator = properties.keySet().iterator();
	while (iterator.hasNext()) {
	    String key = iterator.next();
	    builder.append("\"").append(key).append("\"").append(": \"").append(properties.get(key)).append("\"");
	    if (iterator.hasNext()) {
		builder.append(",");
	    }
	}
	builder.append("}");
	return builder.toString();
    }

    public static String getJsonArrayString(List<JsonObject> jsonObjects) {
	StringBuilder builder = new StringBuilder("[");
	Iterator<JsonObject> iterator = jsonObjects.iterator();
	while (iterator.hasNext()) {
	    builder.append(iterator.next().getJsonString());
	    if (iterator.hasNext()) {
		builder.append(",");
	    }
	}
	builder.append("]");
	return builder.toString();

    }
}