Add help message

app.js

@@ -34,6 +34,10 @@ function handle_application_command(state, data, channel_id) {
         case "pet":
             return pet(state);
 
+        case "help":
+            return help(state);
+
+
         default:
             console.error(`unknown command: ${name}`);
             return res.status(400).json({ error: "unknown command" });

command_impls.js

@@ -35,3 +35,14 @@ export function unschedule_message(state, id) {
 export function pet(state) {
     return send(state, "[purring noises]");
 }
+
+export function help(state) {
+    return send(
+        state,
+        `Hi, I'm sily-bot!
+Here are the available commands and their descriptions:
+- \`/pet\`  You can pet sily-bot.
+- \`/schedule-message <message> <cron>\`  Schedule a message to be send later. Works like Linux cron jobs in the format second minute hour day month weekday. Put the number (or name of month or weekday) in each spot. If you want it to run every second, minute, etc. instead of once when it reaches the provided number, use a * instead of a number. For instance, to run a job every minute on January 4th, you might use 0 * * 4 January *. The bot replies with a UUID that can be used to cancel the cron job later.
+- \`/unschedule-message <id>\`  Stop sending a message with the given id.`,
+    );
+}

commands.js

@@ -1,30 +1,37 @@
-import 'dotenv/config';
+import "dotenv/config";
 
-import { REST, Routes } from 'discord.js';
+import { REST, Routes } from "discord.js";
 
 const commands = [
     {
-        name: 'pet',
-        description: 'pet sily bot',
+        name: "help",
+        description: "get help",
         type: 1,
         integration_types: [0],
         contexts: [0],
     },
     {
-        name: 'schedule_message',
-        description: 'Register a message to run as a cron job',
+        name: "pet",
+        description: "pet sily bot",
+        type: 1,
+        integration_types: [0],
+        contexts: [0],
+    },
+    {
+        name: "schedule_message",
+        description: "Register a message to run as a cron job",
         type: 1,
         options: [
             {
                 type: 3,
-                name: 'message',
-                description: 'the message to send',
+                name: "message",
+                description: "the message to send",
                 required: true,
             },
             {
                 type: 3,
-                name: 'crontab',
-                description: 'the schedule for the message',
+                name: "crontab",
+                description: "the schedule for the message",
                 required: true,
             },
         ],
@@ -32,14 +39,14 @@ const commands = [
         contexts: [0],
     },
     {
-        name: 'unschedule_message',
-        description: 'Stop sending a scheduled message',
+        name: "unschedule_message",
+        description: "Stop sending a scheduled message",
         type: 1,
         options: [
             {
                 type: 3,
-                name: 'id',
-                description: 'the id of the message to stop',
+                name: "id",
+                description: "the id of the message to stop",
                 required: true,
             },
         ],
@@ -48,14 +55,16 @@ const commands = [
     },
 ];
 
-const rest = new REST({ version: '10' }).setToken(process.env.DISCORD_TOKEN);
+const rest = new REST({ version: "10" }).setToken(process.env.DISCORD_TOKEN);
 
 try {
-    console.log('Started refreshing application commands.');
+    console.log("Started refreshing application commands.");
 
-    await rest.put(Routes.applicationCommands(process.env.APP_ID), { body: commands });
+    await rest.put(Routes.applicationCommands(process.env.APP_ID), {
+        body: commands,
+    });
 
-    console.log('Successfully reloaded application commands.');
+    console.log("Successfully reloaded application commands.");
 } catch (error) {
     console.error(error);
 }