Make trivia support slash commands too

src/main/java/wtf/beatrice/hidekobot/commands/slash/TriviaCommand.java

@@ -0,0 +1,51 @@
+package wtf.beatrice.hidekobot.commands.slash;
+
+import net.dv8tion.jda.api.entities.channel.concrete.TextChannel;
+import net.dv8tion.jda.api.entities.channel.middleman.MessageChannel;
+import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
+import net.dv8tion.jda.api.interactions.commands.build.CommandData;
+import net.dv8tion.jda.api.interactions.commands.build.Commands;
+import org.jetbrains.annotations.NotNull;
+import wtf.beatrice.hidekobot.Cache;
+import wtf.beatrice.hidekobot.commands.base.Trivia;
+import wtf.beatrice.hidekobot.objects.MessageResponse;
+import wtf.beatrice.hidekobot.objects.commands.SlashCommandImpl;
+
+public class TriviaCommand extends SlashCommandImpl
+{
+    @Override
+    public CommandData getSlashCommandData()
+    {
+
+        return Commands.slash("trivia",
+                "Start a Trivia session and play with others!");
+    }
+
+    @Override
+    public void runSlashCommand(@NotNull SlashCommandInteractionEvent event)
+    {
+        MessageChannel channel = event.getChannel();
+
+        if(!(channel instanceof TextChannel))
+        {
+            event.reply(Trivia.getNoDMsError()).queue();
+            return;
+        }
+
+        if(Trivia.channelsRunningTrivia.contains(channel.getId()))
+        {
+            event.reply(Trivia.getTriviaAlreadyRunningError()).setEphemeral(true).queue();
+            return;
+        }
+
+        MessageResponse response = Trivia.generateMainScreen();
+
+        event.replyEmbeds(response.embed()).addActionRow(response.components()).queue(interaction ->
+        {
+            interaction.retrieveOriginal().queue(message -> {
+                Cache.getDatabaseSource().trackRanCommandReply(message, event.getUser());
+                Cache.getDatabaseSource().queueDisabling(message);
+            });
+        });
+    }
+}