file-commons/src/utilities/File.ts

import NodeBlob from 'node-blob'
import isBrowser from './isBrowser'

interface NodeFileConfig {
  type: string
  lastModified?: number
}

class File extends NodeBlob {
  public readonly name: string
  public readonly lastModified: number
  constructor(blobParts: unknown[], name: string, config: Partial<NodeFileConfig>) {
    super(blobParts, config)
    this.name = name

    switch (typeof config.lastModified!) {
      case 'number':
        if (isNaN(config.lastModified as number)) {
          break
        }
        this.lastModified = Math.floor(config.lastModified as number)
        return
      case 'object':
        // force native Date objects only!
        if (((config.lastModified as unknown) as Record<string, unknown>).constructor.name !== 'Date') {
          break
        }
        const tryDate = new Date(config.lastModified!).getTime()
        if (isNaN(tryDate)) {
          break
        }
        this.lastModified = tryDate
        return
      default:
        break
    }
    this.lastModified = 0
  }
}

export default isBrowser() ? window.File : File