discord-kagebot/src/main/kotlin/moe/kageru/kagebot/command/MessageRedirect.kt

package moe.kageru.kagebot.command

import moe.kageru.kagebot.Log
import moe.kageru.kagebot.MessageUtil
import moe.kageru.kagebot.Util
import moe.kageru.kagebot.Util.applyIf
import moe.kageru.kagebot.Util.asOption
import moe.kageru.kagebot.config.Config
import moe.kageru.kagebot.config.LocalizationSpec
import moe.kageru.kagebot.extensions.unwrap
import org.javacord.api.entity.channel.TextChannel
import org.javacord.api.event.message.MessageCreateEvent

class MessageRedirect(target: String, private val anonymous: Boolean = false) {
  private val targetChannel: TextChannel = Util.findChannel(target).unwrap()

  fun execute(message: MessageCreateEvent, command: Command) {
    val embed = MessageUtil.withEmbed {
      val redirectedText = message.readableMessageContent
        .applyIf(command.matchType == MatchType.PREFIX) { content ->
          content.removePrefix(command.trigger).trim()
        }
      addField(Config.localization[LocalizationSpec.redirectedMessage], redirectedText)
      Log.info("Redirected message: $redirectedText")
    }
    // No inlined if/else because the types are different.
    // Passing the full message author will also include the avatar in the embed.
    embed.apply {
      if (anonymous) {
        setAuthor("Anonymous")
      } else {
        setAuthor(message.messageAuthor)
      }
    }

    if (MessageUtil.sendEmbed(targetChannel, embed).asOption().isEmpty()) {
      Log.warn("Could not redirect message to channel $targetChannel")
    }
  }
}