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67 lines
2.7 KiB
Markdown
67 lines
2.7 KiB
Markdown
# TelegramBotAPI Behaviour Builder Extensions
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[](https://maven-badges.herokuapp.com/maven-central/dev.inmo/tgbotapi.behaviour_builder)
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## What is it?
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This extension was created to make it more simple to build bot steps handling. Usually, you must use something like:
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```kotlin
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val bot = telegramBot(TOKEN)
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bot.startGettingFlowsUpdatesByLongPolling {
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messagesFlow.subscribeSafelyWithoutExceptions {
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// ...
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}
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// here I already tired to write this example 😫
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}
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```
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This library offer other way to do a lot of routine in more simple way:
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```kotlin
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telegramBotWithBehaviour(token) {
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onCommand("start".regex) {
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execute(SendTextMessage(it.chat.id, "This bot can ...")) // replaceable with reply(it, "This bot can ...") when you are using `tgbotapi.extensions.api`
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}
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}
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```
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## Triggers
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In terminology of this project the `Triggers` are things which have no initial message, may have own filter for incoming
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messages and filter messages for context which will be used in subcontext. Full syntax with `onText` as an example:
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```kotlin
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telegramBotWithBehaviour(TOKEN) {
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onText(
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includeFilterByChatInBehaviourSubContext = true, // if false - last lambda will receive all messages instead of filtered by chat messages
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additionalFilter = { message: TextMessage ->
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// here you may check incoming message for any requirements before it will be passed to the main lambda
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}
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) { message: TextMessage -> // this here is `BehaviourContext`
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// here put your actions and additional waiters
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}
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}
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```
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## Waiters
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Waiters targeted to get some content "here and now", they must be used inside some trigger main lambda:
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```kotlin
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telegramBotWithBehaviour(TOKEN) {
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onCommand("start") { message: TextMessage ->
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val userPhotos = waitPhoto(
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SendTextMessage(it.chat.id, "Ok, send me some photo, please"), // init request, can be any `Request` object
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{ update: Update -> // That is update which is NOT passed requirements. In current context we expect some photo, but received something else
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SendTextMessage(it.chat.id, "Excuse me, but I can accept only photos") // it could be null
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},
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2, // some count of photos
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includeMediaGroups = true, // if false, messages related to some media group will be skipped and recognized as incorrect
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) { message: CommonMessate<PhotoContent> -> // this method is optional and you can use it in case you want to add some additional requirements checks
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message.content // return null if message didn't passed requirements
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}
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}
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}
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```
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