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package lv.ctco.cukesrest.internal.helpers;

public class Strings {

    public static boolean containsIgnoreCase(CharSequence str, CharSequence searchStr) {
        if(str != null && searchStr != null) {
            int len = searchStr.length();
            int max = str.length() - len;

            for(int i = 0; i <= max; ++i) {
                if(regionMatches(str, true, i, searchStr, 0, len)) {
                    return true;
                }
            }

            return false;
        } else {
            return false;
        }
    }

    static boolean regionMatches(CharSequence cs, boolean ignoreCase, int thisStart, CharSequence substring, int start, int length) {
        if(cs instanceof String && substring instanceof String) {
            return ((String)cs).regionMatches(ignoreCase, thisStart, (String)substring, start, length);
        } else {
            int index1 = thisStart;
            int index2 = start;
            int tmpLen = length;

            while(tmpLen-- > 0) {
                char c1 = cs.charAt(index1++);
                char c2 = substring.charAt(index2++);
                if(c1 != c2) {
                    if(!ignoreCase) {
                        return false;
                    }

                    if(Character.toUpperCase(c1) != Character.toUpperCase(c2) && Character.toLowerCase(c1) != Character.toLowerCase(c2)) {
                        return false;
                    }
                }
            }

            return true;
        }
    }

    public static boolean isEmpty(CharSequence cs) {
        return cs == null || cs.length() == 0;
    }

    public static String escapeRegex(String regex) {
        return regex.replace("{", "\\{").replace("}", "\\}");
    }
}