import fs from 'node:fs/promises'

let mapSVGs: string[] | undefined

export async function getMapSVGs(): Promise<string[]> {
  if (mapSVGs === undefined) {
    const files = await fs.readdir('./public/images/maps/')

    const SVGs: string[] = []

    for (const file of files) {
      if (file.toLowerCase().endsWith('.svg')) {
        SVGs.push(file)
      }
    }

    mapSVGs = SVGs
  }

  return mapSVGs
}