net.dv8tion.jda.api.events.guild.update.GuildUpdateBannerEvent Maven / Gradle / Ivy

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Java wrapper for the popular chat & VOIP service: Discord https://discord.com
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/*
 * Copyright 2015 Austin Keener, Michael Ritter, Florian Spieß, and the JDA contributors
 *
 * 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 net.dv8tion.jda.api.events.guild.update;

import net.dv8tion.jda.api.JDA;
import net.dv8tion.jda.api.entities.Guild;
import net.dv8tion.jda.api.utils.ImageProxy;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

/**
 * Indicates that the {@link net.dv8tion.jda.api.entities.Guild#getBannerId() banner} of a {@link net.dv8tion.jda.api.entities.Guild Guild} changed.
 *
 * Can be used to detect when the banner changes and retrieve the old one
 *
 * 
Identifier: {@code banner}
 */
public class GuildUpdateBannerEvent extends GenericGuildUpdateEvent
{
    public static final String IDENTIFIER = "banner";

    public GuildUpdateBannerEvent(@Nonnull JDA api, long responseNumber, @Nonnull Guild guild, @Nullable String previous)
    {
        super(api, responseNumber, guild, previous, guild.getBannerId(), IDENTIFIER);
    }

    /**
     * The new banner id
     *
     * @return The new banner id, or null if the banner was removed
     */
    @Nullable
    public String getNewBannerId()
    {
        return getNewValue();
    }

    /**
     * The new banner url
     *
     * @return The new banner url, or null if the banner was removed
     */
    @Nullable
    public String getNewBannerUrl()
    {
        return next == null ? null : String.format(Guild.BANNER_URL, guild.getId(), next, next.startsWith("a_") ? "gif" : "png");
    }

    /**
     * Returns an {@link ImageProxy} for this guild's new banner.
     *
     * @return Possibly-null {@link ImageProxy} of this guild's new banner
     *
     * @see    #getNewBannerUrl()
     */
    @Nullable
    public ImageProxy getNewBanner()
    {
        final String newBannerUrl = getNewBannerUrl();
        return newBannerUrl == null ? null : new ImageProxy(newBannerUrl);
    }

    /**
     * The old banner id
     *
     * @return The old banner id, or null if the banner didn't exist
     */
    @Nullable
    public String getOldBannerId()
    {
        return getOldValue();
    }

    /**
     * The old banner url
     *
     * @return The old banner url, or null if the banner didn't exist
     */
    @Nullable
    public String getOldBannerUrl()
    {
        return previous == null ? null : String.format(Guild.BANNER_URL, guild.getId(), previous, previous.startsWith("a_") ? "gif" : "png");
    }

    /**
     * Returns an {@link ImageProxy} for this guild's old banner.
     * 
     * Note: the old banner may not always be downloadable as it might have been removed from Discord.
     *
     * @return Possibly-null {@link ImageProxy} of this guild's old banner
     *
     * @see    #getOldBannerUrl()
     */
    @Nullable
    public ImageProxy getOldBanner()
    {
        final String oldBannerUrl = getOldBannerUrl();
        return oldBannerUrl == null ? null : new ImageProxy(oldBannerUrl);
    }
}