FormTrick.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2022 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.marker;
 
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
import org.turro.elephant.context.ElephantContext;
 
public class FormTrick {
 
  public static String createTrick(int seconds) {
    return URLEncoder.encode(ElephantContext.encrypt(Instant.now().plus(Duration.of(seconds, ChronoUnit.SECONDS)).toString()), StandardCharsets.UTF_8);
  }
  
  public static boolean checkTrick(String value) {
    return Instant.parse(URLDecoder.decode(ElephantContext.decrypt(value), StandardCharsets.UTF_8)).isAfter(Instant.now());
  }
  
}