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/*
 * Copyright 2016 Goldman Sachs.
 *
 * 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 com.gs.dmn;

import org.apache.commons.lang3.StringUtils;

public class NameUtils {
    public static boolean isSimpleNameStart(int codePoint) {
        return Character.isJavaIdentifierStart(codePoint);
    }

    public static boolean isSimpleNamePart(int codePoint) {
        return Character.isJavaIdentifierPart(codePoint);
    }

    public static boolean isSimpleName(String name) {
        if (!isSimpleNameStart(name.codePointAt(0))) {
            return false;
        }
        for (int cp : name.codePoints().toArray()) {
            if (!(isSimpleNamePart(cp))) {
                return false;
            }
        }
        return true;
    }

    public static boolean isQuotedName(String name) {
        return
                !StringUtils.isBlank(name) &&
                name.startsWith("'") &&
                name.endsWith("'");
    }

    public static String removeSingleQuotes(String name) {
        if (isQuotedName(name)) {
            name = name.replaceAll("''", "'");
            name = name.substring(1, name.length() - 1);
        }
        return name;
    }
}