Make coinflip support both slash and message commands

src/main/java/wtf/beatrice/hidekobot/commands/message/CoinFlipCommand.java

@@ -0,0 +1,44 @@
+package wtf.beatrice.hidekobot.commands.message;
+
+import net.dv8tion.jda.api.Permission;
+import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
+import org.jetbrains.annotations.Nullable;
+import wtf.beatrice.hidekobot.commands.base.CoinFlip;
+import wtf.beatrice.hidekobot.objects.commands.MessageCommand;
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+
+public class CoinFlipCommand implements MessageCommand
+{
+
+    @Override
+    public LinkedList<String> getCommandLabels() {
+        return new LinkedList<>(Arrays.asList("coinflip", "flip", "flipcoin"));
+    }
+
+    @Nullable
+    @Override
+    public List<Permission> getPermissions() {
+        return null; // null because it can be used anywhere
+    }
+
+    @Override
+    public boolean passRawArgs() {
+        return false;
+    }
+
+    @Override
+    public void runCommand(MessageReceivedEvent event, String label, String[] args) {
+
+        // perform coin flip
+        event.getMessage().reply(CoinFlip.genRandom())
+                .addActionRow(CoinFlip.getReflipButton())
+                .queue((message) ->
+                {
+                    // set the command as expiring and restrict it to the user who ran it
+                    CoinFlip.trackAndRestrict(message, event.getAuthor());
+                }, (error) -> {});
+    }
+}