import { Sequelize } from 'sequelize-typescript'

export function isSQLite (sequelize: Sequelize): boolean {
  return sequelize.options.dialect === 'sqlite'
}

export function getImageMimeType (imagePath: string): string | undefined {
  const fileExtension = /[^.]+$/.exec(imagePath)
  switch (fileExtension?.[0]) {
    case 'bmp':
      return 'image/bmp'
    case 'gif':
      return 'image/gif'
    case 'jpg':
    case 'jpeg':
      return 'image/jpeg'
    case 'png':
      return 'image/png'
    case 'tiff':
      return 'image/tiff'
    case 'svg':
      return 'image/svg+xml'
    default:
      return undefined
  }
}

// [Postgres] Handling NULL bytes
// https://github.com/sequelize/sequelize/issues/6485
export function stripNullByte (value: string): string {
  value = '' + value
  // eslint-disable-next-line no-control-regex
  return value ? value.replace(/\u0000/g, '') : value
}

export function processData (data, _default, process?) {
  if (data === undefined) return data
  else if (process) {
    if (data === null) {
      return _default
    } else {
      return process(data)
    }
  } else {
    if (data === null) {
      return _default
    } else {
      return data
    }
  }
}