setup-bot-handlers

Agent Building

Sets up bot handlers using DSL or annotations. Use when configuring command handlers, input handlers, common handlers, update handlers, or fallback handlers for the telegram-bot library.

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Setup Bot Handlers

Two Approaches

DSL: bot.setFunctionality { ... } — define handlers inline
Annotations: @CommandHandler, @InputHandler, etc. — KSP generates activities; use with bot.handleUpdates() (loads handlers via META-INF)

DSL Handlers

Inside bot.setFunctionality { }:

Handler	Purpose
`onCommand("/start") { }`	Commands (e.g. /start)
`onInput("id") { }`	Single-step input; route via `bot.inputListener[user] = "id"`
`inputChain("id") { }.andThen { }`	Multi-step input chain
`common("text") { }` or `common(Regex("...")) { }`	Text/regex match (lower priority than commands)
`onUpdate(UpdateType.X) { }`	All updates of given type
`whenNotHandled { }`	Fallback for unprocessed updates

Typed Update Handlers

Use typed wrappers for ActivityCtx<XxxUpdate>:

onMessage { } — MessageUpdate
onCallbackQuery { } — CallbackQueryUpdate
onInlineQuery { } — InlineQueryUpdate
onEditedMessage { }, onChannelPost { }, onChatMember { }, etc.

Input Listener

Route the next user message to an input handler or chain:

bot.inputListener[user] = "conversation"
// or
bot.inputListener.set(user) { "conversation-2step" }

Annotation Handlers

Annotation	Purpose
`@CommandHandler(["/start"])`	Command handler
`@CommandHandler.CallbackQuery(["/data"])`	Callback query with optional `autoAnswer`
`@InputHandler(["id"])`	Input handler
`@CommonHandler.Text(["value"])` or `@CommonHandler.Regex("...")`	Text/regex match
`@UpdateHandler([UpdateType.MESSAGE, ...])`	Update type handler
`@UnprocessedHandler`	Fallback

Guards

Add pre-processing checks:

DSL: guard = UserPresentGuard::class (or DefaultGuard::class)
Annotation: @Guard(UserPresentGuard::class) or @Guard(guard = UserPresentGuard::class)

Supported by: CommandHandler, CommandHandler.CallbackQuery, InputHandler.

Rate Limits

DSL: rateLimits = RateLimits.NOT_LIMITED or custom
Annotation: @RateLimits(period = 60_000, rate = 5) — 5 requests per 60 seconds
Default: no limit

Supported by: CommandHandler, CallbackQuery, InputHandler, CommonHandler.

ArgParser

Custom argument parsing for commands and callback data:

Annotation: @ArgParser(argParser = CustomArgParser::class)
Supported by: CommandHandler, CallbackQuery, CommonHandler
Default: DefaultArgParser

Annotation Reference

Annotation	Parameters	Default
`@CommandHandler`	`value` (commands), `scope` (UpdateType[])	scope: MESSAGE
`@CommandHandler.CallbackQuery`	`value` (callback data prefixes), `autoAnswer` (bool)	autoAnswer: false
`@InputHandler`	`value` (input identifiers)	—
`@CommonHandler.Text`	`value`, `filters`, `priority`, `scope`	filters: [], priority: 0, scope: MESSAGE
`@CommonHandler.Regex`	`value` (pattern), `options`, `filters`, `priority`, `scope`	options: [], filters: [], priority: 0, scope: MESSAGE
`@UpdateHandler`	`type` (UpdateType[])	—
`@UnprocessedHandler`	—	—
`@Guard`	`guard` (KClass)	DefaultGuard
`@ArgParser`	`argParser` (KClass)	DefaultArgParser
`@RateLimits`	`period` (ms), `rate` (requests)	0, 0