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/*
 * SonarQube Java
 * Copyright (C) 2012-2018 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program 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 3 of the License, or (at your option) any later version.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.java.checks;

import org.sonar.check.Rule;
import org.sonar.java.RspecKey;
import org.sonar.plugins.java.api.JavaFileScanner;
import org.sonar.plugins.java.api.JavaFileScannerContext;

@Rule(key = "S00113")
@RspecKey("S113")
public class MissingNewLineAtEndOfFileCheck implements JavaFileScanner {


  @Override
  public void scanFile(JavaFileScannerContext context) {
    if (isEmptyOrNotEndingWithNewLine(context.getFileContent())) {
      context.addIssueOnFile(this, "Add a new line at the end of this file.");
    }
  }

  private static boolean isEmptyOrNotEndingWithNewLine(String content) {
    if (content.isEmpty()) {
      return true;
    }
    char lastChar = content.charAt(content.length() - 1);
    return lastChar != '\n' && lastChar != '\r';
  }
}