org.ng200.openolympus.services.ContestService.java Source code

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Here is the source code for org.ng200.openolympus.services.ContestService.java

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/**
 * The MIT License
 * Copyright (c) 2014 Nick Guletskii
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.ng200.openolympus.services;

import java.time.Instant;
import java.util.Date;
import java.util.Optional;
import java.util.stream.Collectors;

import org.ng200.openolympus.model.Contest;
import org.ng200.openolympus.model.Solution;
import org.ng200.openolympus.model.Task;
import org.ng200.openolympus.model.User;
import org.ng200.openolympus.repositories.ContestParticipationRepository;
import org.ng200.openolympus.repositories.ContestRepository;
import org.ng200.openolympus.repositories.ContestTimeExtensionRepository;
import org.ng200.openolympus.repositories.SolutionRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class ContestService {

    @Autowired
    private ContestRepository contestRepository;
    @Autowired
    private ContestParticipationRepository contestParticipationRepository;
    @Autowired
    private ContestTimeExtensionRepository contestTimeExtensionRepository;

    @Autowired
    private SolutionRepository solutionRepository;

    @Transactional
    public void delete(Contest contest) {
        contest = this.contestRepository.findOne(contest.getId());
        contest.getTasks().clear();
        contest = this.contestRepository.save(contest);
        this.contestParticipationRepository.delete(this.contestParticipationRepository.findByContest(contest));
        this.contestTimeExtensionRepository.delete(this.contestTimeExtensionRepository.findByContest(contest));
        this.contestRepository.delete(contest);
    }

    public Instant getContestEndIncludingAllTimeExtensions(final Contest contest) {
        return contest.getStartTime().toInstant().plusMillis(contest.getDuration())
                .plusMillis(this.contestTimeExtensionRepository.findByContest(contest).stream()
                        .collect(Collectors.groupingBy(timeExtension -> timeExtension.getContest())).values()
                        .stream()
                        .map(group -> group.stream().map(timeExtension -> timeExtension.getDuration())
                                .reduce((l, r) -> l + r))
                        .max((l, r) -> l.orElse(0l).compareTo(r.orElse(0l))).orElse(Optional.of(0l)).orElse(0l));
    }

    public Solution getLastSolutionInContestByUserForTask(final Contest contest, final User user, final Task task) {
        return this.solutionRepository
                .findByTaskAndUserAndTimeAddedBetweenOrderByTimeAddedDesc(task, user, contest.getStartTime(),
                        Date.from(contest.getStartTime().toInstant()
                                .plusMillis(contest.getDuration() + this.getTimeExtensions(contest, user))))
                .stream().findFirst().orElse(null);
    }

    public Contest getRunningContest() {
        return this.intersects(Date.from(Instant.now()), Date.from(Instant.now()));
    }

    public long getTimeExtensions(final Contest contest, final User user) {
        return this.contestTimeExtensionRepository.findByUserAndContest(user, contest).stream()
                .map((timeExtension) -> timeExtension.getDuration()).reduce((x, y) -> (x + y)).orElse(0l);
    }

    public boolean hasContestStarted(final Contest contest) {
        if (contest == null) {
            return false;
        }
        return !contest.getStartTime().toInstant().isAfter(Instant.now());
    }

    public Contest intersects(final Date startDate, final Date endDate) {
        return this.contestRepository.findIntersects(startDate, endDate);
    }

    public boolean isContestInProgressForUser(final Contest contest, final User user) {
        if (Instant.now().isBefore(contest.getStartTime().toInstant())) {
            return false;
        }
        return !contest.getStartTime().toInstant()
                .plusMillis(contest.getDuration() + this.getTimeExtensions(contest, user)).isAfter(Instant.now());
    }

    public boolean isContestOverIncludingAllTimeExtensions(final Contest contest) {
        return this.getContestEndIncludingAllTimeExtensions(contest).isBefore(Instant.now());
    }

    public boolean isUserInContest(final User user, final Contest contest) {
        return this.contestParticipationRepository.findOneByContestAndUser(contest, user) != null;
    }
}