/*
 * eXist Open Source Native XML Database
 * Copyright (C) 2013 The eXist Project
 * http://exist-db.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *  
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *  
 *  $Id$
 */
package org.exist.util.serializer.json;

import java.io.IOException;
import java.io.Writer;

public class JSONValue extends JSONNode {
	
    public final static String NAME_VALUE = "#text";

    private String content = null;

    public JSONValue(final String content) {
        this(content, true);
    }

    public JSONValue(final String content, final boolean escape) {
        super(Type.VALUE_TYPE, NAME_VALUE);
        
        if(escape) {
            this.content =  escape(content);
        } else {
            this.content = content;
        }
    }

    public JSONValue() {
        super(Type.VALUE_TYPE, NAME_VALUE);
    }

    public void addContent(final String str) {
        if(content == null){
            content = str;
        } else {
            content += str;
        }
    }

    @Override
    public void serialize(final Writer writer, final boolean isRoot) throws IOException {
        if(getNextOfSame() != null) {
            writer.write('[');
            JSONNode next = this;
            while(next != null) {
                next.serializeContent(writer);
                next = next.getNextOfSame();
                if(next != null) {
                    writer.write(',');
                }
                if(isIndent()) {
                    writer.write(' ');
                }
            }
            writer.write(']');
        } else {
            serializeContent(writer);
        }		
    }

    @Override
    public void serializeContent(final Writer writer) throws IOException {
        if(getSerializationDataType() != SerializationDataType.AS_LITERAL) {
            writer.write('"');
        }
        
        writer.write(content);
        
        if(getSerializationDataType() != SerializationDataType.AS_LITERAL) {
            writer.write('"');
        }
    }

    protected static String escape(final String str) {
        final StringBuilder builder = new StringBuilder();
        for(int i = 0; i < str.length(); i++) {
            final char ch = str.charAt(i);
            switch (ch) {
                case '\n':
                    builder.append("\\n");
                    break;
                case '\r':
                    break;
                case '\t':
                    builder.append("\\t");
                    break;
                case '"':
                    builder.append("\\\"");
                    break;
                case '\\':
                    builder.append("\\\\");
                    break;
                default:
                    builder.append(ch);
                    break;
            }
        }
        return builder.toString();
    }
}