TelegramBotAPI-examples/HelloBot/src/main/kotlin/HelloBot.kt

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import dev.inmo.tgbotapi.extensions.api.chat.get.getChat
import dev.inmo.tgbotapi.extensions.api.chat.get.getChatAdministrators
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import dev.inmo.tgbotapi.extensions.api.send.reply
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import dev.inmo.tgbotapi.extensions.api.send.sendTextMessage
import dev.inmo.tgbotapi.extensions.api.telegramBot
import dev.inmo.tgbotapi.extensions.utils.formatting.linkMarkdownV2
import dev.inmo.tgbotapi.extensions.utils.formatting.textMentionMarkdownV2
import dev.inmo.tgbotapi.extensions.utils.safely
import dev.inmo.tgbotapi.extensions.utils.updates.retrieving.startGettingFlowsUpdatesByLongPolling
import dev.inmo.tgbotapi.types.ParseMode.MarkdownV2
import dev.inmo.tgbotapi.types.User
import dev.inmo.tgbotapi.types.chat.abstracts.*
import dev.inmo.tgbotapi.types.toChatId
import dev.inmo.tgbotapi.utils.extensions.escapeMarkdownV2Common
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import kotlinx.coroutines.*
import kotlinx.coroutines.flow.launchIn
import kotlinx.coroutines.flow.onEach
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/**
* The main purpose of this bot is just to answer "Oh, hi, " and add user mention here
*/
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suspend fun main(vararg args: String) {
val botToken = args.first()
val bot = telegramBot(botToken)
val scope = CoroutineScope(Dispatchers.Default)
bot.startGettingFlowsUpdatesByLongPolling(scope = scope) {
messageFlow.onEach {
safely {
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val message = it.data
val chat = message.chat
val answerText = "Oh, hi, " + when (chat) {
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is PrivateChat -> "${chat.firstName} ${chat.lastName}".textMentionMarkdownV2(chat.id)
is User -> "${chat.firstName} ${chat.lastName}".textMentionMarkdownV2(chat.id)
is SupergroupChat -> (chat.username ?.username ?: bot.getChat(chat).inviteLink) ?.let {
chat.title.linkMarkdownV2(it)
} ?: chat.title
is GroupChat -> bot.getChat(chat).inviteLink ?.let {
chat.title.linkMarkdownV2(it)
} ?: chat.title
else -> "Unknown :(".escapeMarkdownV2Common()
}
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bot.reply(
message,
answerText,
MarkdownV2
)
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}
}.launchIn(scope)
channelPostFlow.onEach {
safely {
val chat = it.data.chat
val message = "Hi everybody in this channel \"${(chat as ChannelChat).title}\""
bot.sendTextMessage(chat, message, MarkdownV2)
}
}.launchIn(scope)
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}
scope.coroutineContext[Job]!!.join()
}