harmony/src/gateway/handlers/inviteCreate.ts

import { Gateway, GatewayEventHandler } from '../index.ts'
import { Guild } from '../../structures/guild.ts'
import { InviteCreatePayload } from '../../types/gateway.ts'
import { ChannelPayload, GuildPayload, InvitePayload } from '../../../mod.ts'
import getChannelByType from '../../utils/getChannelByType.ts'

export const inviteCreate: GatewayEventHandler = async (
  gateway: Gateway,
  d: InviteCreatePayload
) => {
  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
  const guild: Guild | undefined = await gateway.client.guilds.get(d.guild_id!)

  // Weird case, shouldn't happen
  if (guild === undefined) return

  /**
   * TODO(DjDeveloperr): Add _get method in BaseChildManager
   */
  const cachedChannel = await gateway.client.channels._get(d.channel_id)

  // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
  const cachedGuild: GuildPayload | undefined =
    d.guild_id === undefined
      ? undefined
      : await guild.client.guilds._get(d.guild_id)

  const dataConverted: InvitePayload = {
    code: d.code,
    guild: cachedGuild,
    // had to use `as ChannelPayload` because the _get method returned `ChannelPayload | undefined` which errored
    channel: cachedChannel as ChannelPayload,
    inviter: d.inviter,
    target_user: d.target_user,
    target_user_type: d.target_user_type,
  }

  // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
  await guild.invites.set(d.code, dataConverted)
  const invite = await guild.invites.get(d.code)
  gateway.client.emit('inviteCreate', invite)
}