/*-

* -\-\-

* github-api

* --

* Copyright (C) 2016 - 2020 Spotify AB

* --

* 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.spotify.github;

import static java.util.Objects.requireNonNull;

import java.time.Instant;

import java.util.Optional;

import javax.annotation.Nonnull;

/**

* Make sure we can represent a GitHub date, they are inconsistent at best. Sometimes the date is

* represented as a Long, sometimes represented as a String following: {@link

* java.time.format.DateTimeFormatter#ISO_INSTANT}

*/

public class GitHubInstant {

private Optional<Long> epochSeconds;

private Optional<Instant> instant;

private GitHubInstant(final Optional<Long> epoch, final Optional<Instant> inst) {

epochSeconds = epoch;

instant = inst;

}

/**

* Creates an instance of this class from a number.

*

* @param inst a Number

* @return GitHubDateWrapper

*/

public static GitHubInstant create(@Nonnull final Number inst) {

final Number number = requireNonNull(inst);

return new GitHubInstant(Optional.of(number.longValue()), Optional.empty());

}

/**

* Creates an instance of this class from an instant.

*

* @param inst an Instant

* @return GitHubDateWrapper

*/

public static GitHubInstant create(@Nonnull final Instant inst) {

final Instant instant = requireNonNull(inst);

return new GitHubInstant(Optional.empty(), Optional.of(instant));

}

/**

* Returns the Class type of the contained value.

*

* @return a Class.

*/

public Class<?> type() {

return epochSeconds.isPresent() ? epochSeconds.get().getClass() : instant.get().getClass();

}

/**

* Returns the contained value as a unix epoch contained in a Long

*

* @return epoch in seconds

*/

public Long epoch() {

return epochSeconds.orElseGet(() -> instant.get().getEpochSecond());

}

/**

* Rerturns the contained value as a unix epoch contained in an Instant

*

* @return an instant

*/

public Instant instant() {

return instant.orElseGet(() -> Instant.ofEpochSecond(epochSeconds.get()));

}

}