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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library 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 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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.
 */

package com.liferay.util;

import com.liferay.petra.string.CharPool;
import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.util.StringBundler;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.UnicodeFormatter;

import java.net.URLDecoder;
import java.net.URLEncoder;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author Brian Wing Shun Chan
 * @author Shuyang Zhou
 */
public class JS {

	public static String decodeURIComponent(String s) {

		// Get rid of all unicode

		Matcher matcher = _pattern.matcher(s);

		s = matcher.replaceAll(StringPool.BLANK);

		// Adjust for JavaScript specific annoyances

		s = StringUtil.replace(s, '+', "%2B");
		s = StringUtil.replace(s, "%20", "+");

		// Decode URL

		try {
			s = URLDecoder.decode(s, StringPool.UTF8);
		}
		catch (Exception e) {
		}

		return s;
	}

	public static String encodeURIComponent(String s) {

		// Encode URL

		try {
			s = URLEncoder.encode(s, StringPool.UTF8);
		}
		catch (Exception e) {
		}

		// Adjust for JavaScript specific annoyances

		s = StringUtil.replace(s, '+', "%20");
		s = StringUtil.replace(s, "%2B", "+");

		return s;
	}

	/**
	 * @deprecated As of Bunyan (6.0.x), replaced by {@link #encodeURIComponent}
	 */
	@Deprecated
	public static String escape(String s) {
		return encodeURIComponent(s);
	}

	public static String getSafeName(String name) {
		if (name == null) {
			return null;
		}

		StringBuilder sb = null;

		int index = 0;

		for (int i = 0; i < name.length(); i++) {
			char c = name.charAt(i);

			if ((c == CharPool.DASH) || (c == CharPool.PERIOD) ||
				(c == CharPool.SPACE)) {

				if (sb == null) {
					sb = new StringBuilder(name.length() - 1);

					sb.append(name, index, i);
				}
			}
			else if (sb != null) {
				sb.append(c);
			}
		}

		if (sb == null) {
			return name;
		}

		return sb.toString();
	}

	public static String toScript(String[] array) {
		StringBundler sb = new StringBundler(array.length * 4 + 2);

		sb.append(StringPool.OPEN_BRACKET);

		for (int i = 0; i < array.length; i++) {
			sb.append(StringPool.APOSTROPHE);
			sb.append(UnicodeFormatter.toString(array[i]));
			sb.append(StringPool.APOSTROPHE);

			if ((i + 1) < array.length) {
				sb.append(StringPool.COMMA);
			}
		}

		sb.append(StringPool.CLOSE_BRACKET);

		return sb.toString();
	}

	/**
	 * @deprecated As of Bunyan (6.0.x), replaced by {@link #decodeURIComponent}
	 */
	@Deprecated
	public static String unescape(String s) {
		return decodeURIComponent(s);
	}

	private static final Pattern _pattern = Pattern.compile("%u[0-9a-fA-F]{4}");

}