ean-epc/index.js

EPC Tag Data Standard encoding and decoding library, written in javascript

/*
 * EPC Tag Data Standard
 * 2021 Sergio S. - https://github.com/sergiss/epc-tds
 */

'use strict';

import Utils from './epc/utils/utils';
import { Sgtin96 } from './epc/sgtin/sgtin96';
import { Sgtin198 } from './epc/sgtin/sgtin198';
import { Sgln96 } from './epc/sgln/sgln96';
import { Sgln195 } from './epc/sgln/sgln195';
import { Sscc96 } from './epc/sscc/sscc96';
import { Grai96 } from './epc/grai/grai96';
import { Grai170 } from './epc/grai/grai170';
import { Gid96 } from './epc/gid/gid96';
import { Giai96 } from './epc/giai/giai96';
import { Giai202 } from './epc/giai/giai202';
import { Gsrn96 } from './epc/gsrn/gsrn96';
import { Cpi96 } from './epc/cpi/cpi96';
import { Gdti96 } from './epc/gdti/gdti96';
import { Gdti174 } from './epc/gdti/gdti174';
import { Sgcn96 } from './epc/sgcn/sgcn96';

function fromTagURI(uri) {
  const value = uri.split(':');
  switch (value[3]) {
    case Sgtin96.TAG_URI:
      return Sgtin96.fromTagURI(uri);
    case Sgtin198.TAG_URI:
      return Sgtin198.fromTagURI(uri);
    case Grai96.TAG_URI:
      return Grai96.fromTagURI(uri);
    case Grai170.TAG_URI:
      return Grai170.fromTagURI(uri);
    case Sscc96.TAG_URI:
      return Sscc96.fromTagURI(uri);
    case Sgln96.TAG_URI:
      return Sgln96.fromTagURI(uri);
    case Sgln195.TAG_URI:
      return Sgln195.fromTagURI(uri);
    case Gid96.TAG_URI:
      return Gid96.fromTagURI(uri);
    case Giai96.TAG_URI:
      return Giai96.fromTagURI(uri);
    case Giai202.TAG_URI:
      return Giai202.fromTagURI(uri);
    case Gsrn96.TAG_URI:
      return Gsrn96.fromTagURI(uri);
    case Cpi96.TAG_URI:
      return Cpi96.fromTagURI(uri);
    case Gdti96.TAG_URI:
      return Gdti96.fromTagURI(uri);
    case Gdti174.TAG_URI:
      return Gdti174.fromTagURI(uri);
    case Sgcn96.TAG_URI:
      return Sgcn96.fromTagURI(uri);
    default:
      throw new Error(`Unsupported Tag URI: '${uri}'`);
  }
}

function valueOf(hexEpc) {
  let header = Utils.hexToByte(hexEpc, 0); // first byte of EPC
  switch (header) {
    case Grai96.EPC_HEADER:
      return new Grai96(hexEpc);
    case Grai170.EPC_HEADER:
      return new Grai170(hexEpc);
    case Sscc96.EPC_HEADER:
      return new Sscc96(hexEpc);
    case Sgln96.EPC_HEADER:
      return new Sgln96(hexEpc);
    case Sgln195.EPC_HEADER:
      return new Sgln195(hexEpc);
    case Sgtin96.EPC_HEADER:
      return new Sgtin96(hexEpc);
    case Sgtin198.EPC_HEADER:
      return new Sgtin198(hexEpc);
    case Gid96.EPC_HEADER:
      return new Gid96(hexEpc);
    case Giai96.EPC_HEADER:
      return new Giai96(hexEpc);
    case Giai202.EPC_HEADER:
      return new Giai202(hexEpc);
    case Gsrn96.EPC_HEADER:
      return new Gsrn96(hexEpc);
    case Cpi96.EPC_HEADER:
      return new Cpi96(hexEpc);
    case Gdti96.EPC_HEADER:
      return new Gdti96(hexEpc);
    case Gdti174.EPC_HEADER:
      return new Gdti174(hexEpc);
    case Sgcn96.EPC_HEADER:
      return new Sgcn96(hexEpc);
    default:
      throw new Error(`Unsupported EPC: '${hexEpc}'`);
  }
}

export default {
  Sgtin96,
  Sgtin198,
  Sgln96,
  Sgln195,
  Sscc96,
  Grai96,
  Grai170,
  Gid96,
  Giai96,
  Giai202,
  Gsrn96,
  Cpi96,
  Gdti96,
  Gdti174,
  Sgcn96,
  Utils,
  valueOf,
  fromTagURI,
};