wafrn / packages / backend / utils / processExternalCustomCss.ts

import { Media } from "../models/index.js";
import { completeEnvironment } from "./backendOptions.js";
import { logger } from "./logger.js";

const regex = /url\((.*?)\)/gm

export default async function processExternalCustomCss(userId: string, unprocessed: string): Promise<string> {
  let m;
  let processedCSS = unprocessed.replaceAll('[external-css-override]', '')
  while ((m = regex.exec(unprocessed)) !== null) {
    if (m.index === regex.lastIndex) {
      regex.lastIndex++;
    }

    if (m[1]) {
      const linkMatch = m[1].replace(/['"]/gm, '')
      try {
        const extMedia = await Media.findOrCreate({
          where: {
            url: linkMatch,
          },
          defaults: {
            NSFW: false,
            userId: userId,
            description: "",
            ipUpload: "MEDIA_FROM_CUSTOM_CSS_FROM_ANOTHER_INSTANCE",
            external: true
          }
        })
        processedCSS = processedCSS.replaceAll(linkMatch,
          new URL('/api/v2/cache/media/' + extMedia[0].id, completeEnvironment.externalCacheurl).href
        )
      } catch {
        logger.error({ link: linkMatch }, "cannot media this")
      }
    }
  }
  return processedCSS
}