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/*
 *  Copyright (C) 2019 Alpha Jiang. All rights reserved.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package io.github.alphajiang.hyena.utils;

import java.util.ArrayList;
import java.util.List;

public class StringUtils {
    public static String upperCase(final String str) {
        if (str == null) {
            return null;
        }
        return str.toUpperCase();
    }

    public static boolean equals(final String cs1, final String cs2) {
        if (cs1 == cs2) {
            return true;
        }
        if (cs1 == null || cs2 == null) {
            return false;
        }
        if (cs1.length() != cs2.length()) {
            return false;
        }
        return cs1.equals(cs2);
    }

    public static boolean isBlank(final String cs) {
        int strLen;
        if (cs == null || (strLen = cs.length()) == 0) {
            return true;
        }
        for (int i = 0; i < strLen; i++) {
            if (!Character.isWhitespace(cs.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    public static boolean isNotBlank(final String cs) {
        return !isBlank(cs);
    }


    /**
     * 将逗号分割的字符串转换为long型数组
     *
     * @param in
     * @return
     */
    public static List parseLongIds(String in) {
        if (in == null) {
            return new ArrayList<>();
        }
        List result = new ArrayList<>();
        for (String t : in.split(",")) {
            if (isBlank(t)) {
                continue;

            }
            try {
                long v = Long.valueOf(t);
                result.add(v);
            } catch (Exception e) {
                // ignore
            }
        }
        return result;
    }

    public static List parseIntegerIds(String in) {
        if (in == null) {
            return new ArrayList<>();
        }
        List result = new ArrayList<>();
        for (String t : in.split(",")) {
            if (isBlank(t)) {
                continue;

            }
            try {
                int v = Integer.valueOf(t);
                result.add(v);
            } catch (Exception e) {
                // ignore
            }
        }
        return result;
    }

    public static List splitStringList(String in) {
        if (in == null) {
            return new ArrayList<>();
        }
        List result = new ArrayList<>();
        for (String t : in.split(",")) {
            if (isBlank(t)) {
                continue;

            }
            result.add(t);

        }
        return result;
    }

}