Implement /nag command

commands/calendar/nag/nag.ts

@@ -35,6 +35,26 @@ async function execute(interaction: ChatInputCommandInteraction) {
     await interaction.reply("Nag can't have a blank `text`, try again.");
     return;
   }
+  // Check if we already have an existing nag. In theory, this should be supported entirely, however
+  // I want to keep things simple for now.
+  const existingNags = await Nag.findAll({
+    where: { userId: interaction.user.id },
+    order: [["createdAt", "ASC"]],
+  });
+  if (existingNags && existingNags.length > 0) {
+    // TODO: Hmm... For now, I guess we can just update the database.
+    for (const nag of existingNags) {
+      nag.text = text;
+      nag.failText = interaction.options.getString("failText") ?? undefined;
+      await nag.save();
+      break;
+    }
+    await interaction.reply(
+      `I'll check every day at 9AM if you've completed '${text}'. If not, I'll nag you! Use /checkin to prevent a shameful callout, and /unnag to cancel.`,
+    );
+    return;
+  }
+  // Otherwise, we need to create a new nag.
   const nag = await Nag.create({
     userId: interaction.user.id,
     guildId: interaction.guild?.id,