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package ru.curs.celesta.plugin.maven;

public final class CaseUtils {
    private CaseUtils() {

    }

    public static String capitalize(String text) {
        if (text == null || text.isEmpty()) {
            return text;
        }
        char[] buffer = text.toCharArray();
        buffer[0] = Character.toUpperCase(buffer[0]);
        return String.valueOf(buffer);
    }

    public static String snakeToCamel(String snakeText) {
        if (snakeText == null) {
            return null;
        }
        int state = 0;
        StringBuilder result = new StringBuilder();
        for (int i = 0; i < snakeText.length(); i++) {
            char c = snakeText.charAt(i);
            switch (state) {
                case 0:
                    result.append(c);
                    state = 1;
                    break;
                case 1:
                    result.append(c);
                    if (c != '_') {
                        state = 2;
                    }
                    break;
                case 2:
                    if (c == '_') {
                        state = 3;
                    } else {
                        result.append(c);
                    }
                    break;
                case 3:
                    if (c != '_') {
                        result.append(Character.toUpperCase(c));
                        state = 2;
                    }
                    break;
                default:
                    break;
            }
        }
        return result.toString();
    }

}