Reimplement !vc parsing with Either

monads
kageru 3 years ago
parent 07c45d84d0
commit f742383f38
Signed by: kageru
GPG Key ID: 8282A2BEA4ADA3D2

@ -1,5 +1,9 @@
package moe.kageru.kagebot.features
import arrow.core.Either
import arrow.core.filterOrElse
import arrow.core.flatMap
import arrow.core.rightIfNotNull
import com.fasterxml.jackson.annotation.JsonProperty
import moe.kageru.kagebot.Log
import moe.kageru.kagebot.Util.asOption
@ -10,24 +14,22 @@ import org.javacord.api.DiscordApi
import org.javacord.api.entity.channel.ChannelCategory
import org.javacord.api.entity.channel.ServerVoiceChannel
import org.javacord.api.event.message.MessageCreateEvent
import java.util.concurrent.CompletionException
class TempVCFeature(@JsonProperty("category") category: String? = null) : EventFeature, MessageFeature {
private val category: ChannelCategory? = category?.let { Config.server.categoriesByName(it).first() }
override fun handle(message: MessageCreateEvent) {
if (" " !in message.readableMessageContent) {
message.channel.sendMessage("Invalid syntax, expected 2 arguments")
return
}
val (_, limit) = message.readableMessageContent.split(" ", limit = 2)
limit.toLongOrNull()?.let { parsedLimit ->
if (parsedLimit > 99) {
message.channel.sendMessage("You cant create a channel with that many users.")
}
createChannel(message, parsedLimit)
message.channel.sendMessage("Done")
} ?: message.channel.sendMessage("Invalid syntax, expected a number, got $limit")
override fun handle(message: MessageCreateEvent): Unit = with(message) {
Either.cond(' ' in readableMessageContent,
{ readableMessageContent.split(' ', limit = 2).last() },
{ "Invalid syntax, expected `<command> <userlimit>`" })
.flatMap { limit ->
limit.toIntOrNull().rightIfNotNull { "Invalid syntax, expected a number as limit, got $limit" }
}.filterOrElse({ it < 99 }, { "Error: cant create a channel with that many users." })
.fold({ err -> channel.sendMessage(err) },
{ limit ->
createChannel(message, limit)
channel.sendMessage("Done")
})
}
override fun register(api: DiscordApi) {
@ -44,22 +46,16 @@ class TempVCFeature(@JsonProperty("category") category: String? = null) : EventF
{ Dao.removeTemporaryVC(channel.idAsString) }
)
private fun createChannel(message: MessageCreateEvent, limit: Long) {
val creation = Config.server.createVoiceChannelBuilder().apply {
setUserlimit(limit.toInt())
private fun createChannel(message: MessageCreateEvent, limit: Int): Unit =
Config.server.createVoiceChannelBuilder().apply {
setUserlimit(limit)
setName(generateChannelName(message))
setAuditLogReason("Created temporary VC for user ${message.messageAuthor.discriminatedName}")
category?.let { setCategory(it) }
}.create()
try {
val channel = creation.join()
Dao.addTemporaryVC(channel.idAsString)
} catch (e: CompletionException) {
Log.warn("Attempted to create temporary VC without the necessary permissions")
}
}
setCategory(category)
}.create().asOption().fold(
{ Log.warn("Attempted to create temporary VC without the necessary permissions") },
{ channel -> Dao.addTemporaryVC(channel.idAsString) })
private fun generateChannelName(message: MessageCreateEvent): String {
return "${message.messageAuthor.name}s volatile corner"
}
}
private fun generateChannelName(message: MessageCreateEvent): String =
"${message.messageAuthor.name}s volatile corner"
}

@ -1,6 +1,5 @@
package moe.kageru.kagebot.features
import arrow.Kind
import arrow.core.*
import arrow.core.extensions.either.applicative.applicative
import arrow.core.extensions.either.monad.flatMap

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