Origin.ts

import { URL } from 'url-ponyfill'

import type { GatewayNode } from './GatewayNode'
import { Tag } from './Tag'

import { Log } from './Log'
import { expectSubdomainRedirect } from './expectSubdomainRedirect'
import { checkViaImgSrc } from './checkViaImgSrc'
import { IMG_HASH } from './constants'

const log = new Log('Origin')

class Origin {
  tag: Tag
  constructor (public parent: GatewayNode) {
    this.tag = new Tag('div', 'Origin')
  }

  async check (): Promise<void> {
    // we are unable to check url after subdomain redirect because some gateways
    // may not have proper CORS in place. instead, we manually construct subdomain
    // URL and check if it loading known image works
    const gwUrl = new URL(this.parent.gateway)
    // const imgPathUrl = new URL(`${gwUrl.protocol}//${gwUrl.hostname}/ipfs/${IMG_HASH}?now=${now}&filename=1x1.png#x-ipfs-companion-no-redirect`)
    const imgSubdomainUrl = new URL(`${gwUrl.protocol}//${IMG_HASH}.ipfs.${gwUrl.hostname}/?now=${Date.now()}&filename=1x1.png#x-ipfs-companion-no-redirect`)
    const imgRedirectedPathUrl = new URL(`${gwUrl.protocol}//${gwUrl.hostname}/ipfs/${IMG_HASH}?now=${Date.now()}&filename=1x1.png#x-ipfs-companion-no-redirect`)
    await checkViaImgSrc(imgSubdomainUrl)
      .then(async () => await expectSubdomainRedirect(imgRedirectedPathUrl))
      .then(() => {
        this.tag.win(imgSubdomainUrl.toString())
        this.parent.tag.classList.add('origin')
        // this.parent.checked()
      })
      .catch((err) => this.onerror(err))
  }

  onerror (err: Error): void {
    log.error(err)
    this.tag.err()
    throw err
  }
}

export { Origin }