@ombori/epc-ean/src/epc/sgcn/sgcn96.js

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

import Utils from '../utils/utils';
import { Epc } from '../epc';
import { Type } from '../type';
import { Partition } from '../partition';

export class Sgcn96 extends Epc {
  constructor(hexEpc) {
    super(Sgcn96.TOTAL_BITS);
    if (hexEpc) {
      super.setFromHexString(hexEpc);
    } else {
      super.set(Sgcn96.EPC_HEADER, Epc.EPC_HEADER_OFFSET, Epc.EPC_HEADER_END);
    }
  }

  clone() {
    return new Sgcn96().setFromBitArray(this);
  }

  getType() {
    return Type.Sgcn96;
  }

  fromTagURI(uri) {
    const value = uri.split(':');
    try {
      if (value[3] === this.TAG_URI) {
        const data = value[4].split('.');
        const result = new Sgcn96();
        result.setFilter(parseInt(data[0]));
        result.setPartition(12 - data[1].length);
        result.setCompanyPrefix(parseInt(data[1]));
        result.setCouponReference(parseInt(data[2]));
        result.setSerial(parseInt(data[3]));
        return result;
      }
    } catch (e) {
      // console.log(e)
    }
    throw new Error(`${uri} is not a known EPC tag URI scheme`);
  }

  toTagURI() {
    // F.C.C.S (Filter, Company, Coupon, Serial)
    let partition = Sgcn96.PARTITIONS[this.getPartition()];
    return Sgcn96.TAG_URI_TEMPLATE(
      this.getFilter(),
      this.getSegmentString(partition.a),
      this.getSegmentString(partition.b),
      this.getSerial(),
    );
  }

  toIdURI() {
    // C.C.S (Company, Coupon, Serial)
    let partition = Sgcn96.PARTITIONS[this.getPartition()];
    return Sgcn96.PID_URI_TEMPLATE(
      this.getSegmentString(partition.a),
      this.getSegmentString(partition.b),
      this.getSerial(),
    );
  }

  toBarcode() {
    return this.getSgcn();
  }

  getTotalBits() {
    return Sgcn96.TOTAL_BITS;
  }

  getHeader() {
    return Sgcn96.EPC_HEADER;
  }

  getPartition() {
    return super.get(Sgcn96.PARTITION_OFFSET, Sgcn96.PARTITION_END);
  }

  setPartition(value) {
    if (value < 0 || value >= Sgcn96.PARTITIONS.length) {
      throw new Error(
        `Value '${value}' out of range (min: 0, max: ${Sgcn96.PARTITIONS.length - 1})`,
      );
    }
    super.set(value, Sgcn96.PARTITION_OFFSET, Sgcn96.PARTITION_END);
    return this;
  }

  getSgcn() {
    let partition = Sgcn96.PARTITIONS[this.getPartition()];
    let companyPrefix = super.getSegmentString(partition.a);
    let coupon = super.getSegmentString(partition.b);
    let result = companyPrefix + coupon;
    return result + Utils.computeCheckDigit(result) + this.getSerial();
  }

  setSgcn(sgcn) {
    let partition = Sgcn96.PARTITIONS[this.getPartition()];
    super.setSegment(sgcn.substring(0, partition.a.digits), partition.a);
    let tmp = partition.a.digits + partition.b.digits;
    super.setSegment(sgcn.substring(partition.a.digits, tmp), partition.b);
    this.setSerial(sgcn.substring(tmp + 1, sgcn.length));
    return this;
  }

  getCompanyPrefix() {
    return super.getSegment(Sgcn96.PARTITIONS[this.getPartition()].a);
  }

  setCompanyPrefix(value) {
    super.setSegment(value, Sgcn96.PARTITIONS[this.getPartition()].a);
    return this;
  }

  getCouponReference() {
    return super.getSegment(Sgcn96.PARTITIONS[this.getPartition()].b);
  }

  setCouponReference(value) {
    super.setSegment(value, Sgcn96.PARTITIONS[this.getPartition()].b);
    return this;
  }

  getSerial() {
    return super.get(Sgcn96.SERIAL_OFFSET, Sgcn96.SERIAL_END).toString().substring(1);
  }

  setSerial(value) {
    if (value > Sgcn96.MAX_SERIAL)
      throw new Error(
        `Value '${value}' out of range (min: 0, max: ${Sgcn96.MAX_SERIAL})`,
      );
    super.set(Number('1' + value), Sgcn96.SERIAL_OFFSET, Sgcn96.SERIAL_END);
    return this;
  }
}

Sgcn96.EPC_HEADER = 0x3f;

Sgcn96.TOTAL_BITS = 96;
Sgcn96.PARTITION_OFFSET = 11;
Sgcn96.PARTITION_END = 14;
Sgcn96.SERIAL_OFFSET = 55;
Sgcn96.SERIAL_END = Sgcn96.TOTAL_BITS;
Sgcn96.SERIAL_BITS = 41;
Sgcn96.MAX_SERIAL = Utils.getMaxValue(Sgcn96.SERIAL_BITS);

Sgcn96.TAG_URI = 'sgcn-96';

Sgcn96.TAG_URI_TEMPLATE = (filter, company, coupon, serial) => {
  return `urn:epc:tag:${this.TAG_URI}:${filter}.${company}.${coupon}.${serial}`;
}; // F.C.C.S (Filter, Company, Coupon, Serial)
Sgcn96.PID_URI_TEMPLATE = (company, coupon, serial) => {
  return `urn:epc:id:sgcn:${company}.${coupon}.${serial}`;
}; // C.C.S   (Company, Coupon, Serial)

// Partition table columns: Company prefix, Item Reference
Sgcn96.PARTITIONS = [
  new Partition(Sgcn96.PARTITION_END, 40, 12, 1, 0), // 0 40 12 01 0
  new Partition(Sgcn96.PARTITION_END, 37, 11, 4, 1), // 1 37 11 04 1
  new Partition(Sgcn96.PARTITION_END, 34, 10, 7, 2), // 2 34 10 07 2
  new Partition(Sgcn96.PARTITION_END, 30, 9, 11, 3), // 3 30 09 11 3
  new Partition(Sgcn96.PARTITION_END, 27, 8, 14, 4), // 4 27 08 14 4
  new Partition(Sgcn96.PARTITION_END, 24, 7, 17, 5), // 5 24 07 17 5
  new Partition(Sgcn96.PARTITION_END, 20, 6, 21, 6),
]; // 6 20 06 21 6