Implement basic say command

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

@@ -0,0 +1,36 @@
+package wtf.beatrice.hidekobot.commands.slash;
+
+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.OptionMapping;
+import org.jetbrains.annotations.NotNull;
+
+public class SayCommand
+{
+
+    public void runSlashCommand(@NotNull SlashCommandInteractionEvent event)
+    {
+        MessageChannel channel = event.getChannel();
+
+        // get the text to send
+        OptionMapping textOption = event.getOption("text");
+        String messageContent = "";
+        if(textOption != null)
+        {
+             messageContent = textOption.getAsString();
+        }
+
+        if(textOption == null || messageContent.isEmpty())
+        {
+            event.reply("Hey, you have to tell me what to say!")
+                    .setEphemeral(true)
+                    .queue();
+            return;
+        }
+
+        channel.sendMessage(messageContent).queue();
+        event.reply("Message sent!")
+                .setEphemeral(true)
+                .queue();
+    }
+}