feat(bot): add start and howgoodami commands (WIP)

backend/src/bot/handlers/commands/howgoodami.ts

@@ -0,0 +1,30 @@
+import { handler } from '~/bot/handlers'
+import filters from '~/bot/filters'
+
+export default handler((composer) => {
+  composer
+    .command('howgoodami')
+    .filter(filters.pm)
+    .use(async (ctx) => {
+      const messageId = ctx.message.message_id
+
+      await ctx.reply(ctx.t['HowGoodAmI.Thinking'])
+
+      ctx.domain.getStudentBetterThanPercent(ctx.user)
+        .then((percent) => {
+          ctx.api.sendMessage(
+            ctx.chat.id,
+            ctx.t['HowGoodAmI.Answer'](percent),
+            { reply_parameters: { message_id: messageId } },
+          )
+        })
+        .catch((err) => {
+          ctx.logger.error(err)
+          ctx.api.sendMessage(
+            ctx.chat.id,
+            ctx.t['HowGoodAmI.Failed'],
+            { reply_parameters: { message_id: messageId } },
+          )
+        })
+    })
+})

backend/src/bot/handlers/commands/index.ts

@@ -0,0 +1,7 @@
+import start from './start'
+import howgoodami from './howgoodami'
+
+export default {
+  start,
+  howgoodami,
+}

backend/src/bot/handlers/commands/start.ts

@@ -0,0 +1,11 @@
+import { handler } from '~/bot/handlers'
+import filters from '~/bot/filters'
+
+export default handler((composer) => {
+  composer
+    .command('start')
+    .filter(filters.pm)
+    .use(async (ctx) => {
+      await ctx.reply(ctx.t.Welcome)
+    })
+})

backend/src/bot/handlers/index.ts

@@ -0,0 +1,10 @@
+import { Composer } from 'grammy'
+import type { Ctx } from '~/bot/context'
+
+export function handler(registerFn: (composer: Composer<Ctx>) => void): Composer<Ctx> {
+  const composer = new Composer<Ctx>()
+  registerFn(composer)
+  return composer
+}
+
+export { default } from './root'

backend/src/bot/handlers/root.ts

@@ -0,0 +1,7 @@
+import commands from './commands'
+import { handler } from '.'
+
+export default handler((composer) => {
+  composer.use(commands.start)
+  composer.use(commands.howgoodami)
+})

backend/src/bot/index.ts

@@ -1,5 +1,6 @@
 import { Bot } from 'grammy'
 import plugins from './plugins'
+import handlers from './handlers'
 import type { Ctx } from './context'
 import type { Logger } from '~/lib/logging'
 import type { Domain } from '~/domain'
@@ -21,33 +22,7 @@ export function createBot({
   plugins.domain.install(bot, { domain })
   plugins.translations.install(bot)
 
-  bot.command('start', async (ctx) => {
-    ctx.reply(`${ctx.t.Welcome}\n\n${JSON.stringify(ctx.user)}`)
-  })
-
-  bot.command('howgoodami', async (ctx) => {
-    await ctx.api.sendMessage(
-      ctx.chat.id,
-      ctx.t['HowGoodAmI.Thinking'],
-    )
-
-    ctx.domain.getStudentBetterThanPercent(ctx.user!)
-      .then((percent) => {
-        ctx.api.sendMessage(
-          ctx.chat.id,
-          ctx.t['HowGoodAmI.Answer'](percent),
-          { reply_parameters: { message_id: ctx.update.message!.message_id } },
-        )
-      })
-      .catch((err) => {
-        ctx.logger.error(err)
-        ctx.api.sendMessage(
-          ctx.chat.id,
-          ctx.t['HowGoodAmI.Failed'],
-          { reply_parameters: { message_id: ctx.update.message!.message_id } },
-        )
-      })
-  })
+  bot.use(handlers)
 
   return bot
 }