blitzkit/src/core/discord/resolvePlayer.ts

import {
  ButtonInteraction,
  CacheType,
  ChatInputCommandInteraction,
} from 'discord.js';
import { CYCLIC_API } from '../../constants/cyclic.js';
import { BlitzServer } from '../../constants/servers.js';
import listAccountsPanServer, {
  usernamePatternWithoutPosition,
} from '../blitz/listAccountsPanServer.js';
import errorWithCause from '../node/errorWithCause.js';

export const serverAndIdPattern = /(com|eu|asia)\/[0-9]+/;

export interface ResolvedPlayer {
  server: BlitzServer;
  id: number;
}

export default async function resolvePlayer(
  interaction:
    | ChatInputCommandInteraction<CacheType>
    | ButtonInteraction<CacheType>,
) {
  if (interaction instanceof ChatInputCommandInteraction) {
    const commandUsername = interaction.options.getString('username');
    const displayName = interaction.guild?.members.cache
      .get(interaction.user.id)
      ?.displayName.match(usernamePatternWithoutPosition)?.[0];
    const username = commandUsername ?? displayName;

    if (username === undefined) {
      throw errorWithCause(
        'Username could not be inferred',
        "You didn't provide me a username in the command nor was I able to infer your Blitz username from your Discord nickname. Try providing a username manually in the command or using the `/verify` command to set your Discord nickname to your Blitz username.",
      );
    }

    if (serverAndIdPattern.test(username)) {
      const [server, accountId] = username.split('/');
      return {
        server: server as BlitzServer,
        id: Number(accountId),
      } satisfies ResolvedPlayer;
    } else {
      const accounts = await listAccountsPanServer(username);

      if (accounts[0]) {
        return {
          server: accounts[0].server,
          id: accounts[0].account_id,
        } satisfies ResolvedPlayer;
      } else {
        throw errorWithCause(
          'Could not find user',
          `I couldn't find user \`${username}\`. Try providing a valid username manually or using the \`/verify\` command to set your Discord nickname to your Blitz username.`,
        );
      }
    }
  } else {
    const url = new URL(`${CYCLIC_API}/${interaction.customId}`);
    return {
      id: parseInt(url.searchParams.get('id')!),
      server: url.searchParams.get('server') as BlitzServer,
    } satisfies ResolvedPlayer;
  }
}