@ombori/epc-ean/src/epc/cpi/cpi96.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 Cpi96 extends Epc {
  constructor(hexEpc) {
    super(Cpi96.TOTAL_BITS);
    if (hexEpc) {
      super.setFromHexString(hexEpc);
    } else {
      super.set(Cpi96.EPC_HEADER, Epc.EPC_HEADER_OFFSET, Epc.EPC_HEADER_END);
    }
  }

  clone() {
    return new Cpi96().setFromBitArray(this);
  }

  getType() {
    return Type.GPI96;
  }

  fromTagURI(uri) {
    const value = uri.split(':');
    try {
      if (value[3] === this.TAG_URI) {
        const data = value[4].split('.');
        const result = new Cpi96();
        result.setFilter(parseInt(data[0]));
        result.setPartition(12 - data[1].length);
        result.setCompanyPrefix(parseInt(data[1]));
        result.setPartReference(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.P.S (Filter, Company, Part, Serial)
    let partition = Cpi96.PARTITIONS[this.getPartition()];
    return Cpi96.TAG_URI_TEMPLATE(
      this.getFilter(),
      this.getSegmentString(partition.a),
      this.getSegment(partition.b),
      this.getSerial(),
    );
  }

  toIdURI() {
    // C.P.S (Company, Part, Serial)
    let partition = Cpi96.PARTITIONS[this.getPartition()];
    return Cpi96.PID_URI_TEMPLATE(
      this.getSegmentString(partition.a),
      this.getSegment(partition.b),
      this.getSerial(),
    );
  }

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

  getTotalBits() {
    return Cpi96.TOTAL_BITS;
  }

  getHeader() {
    return Cpi96.EPC_HEADER;
  }

  getPartition() {
    return super.get(Cpi96.PARTITION_OFFSET, Cpi96.PARTITION_END);
  }

  setPartition(value) {
    if (value < 0 || value >= Cpi96.PARTITIONS.length) {
      throw new Error(
        `Value '${value}' out of range (min: 0, max: ${Cpi96.PARTITIONS.length - 1})`,
      );
    }
    super.set(value, Cpi96.PARTITION_OFFSET, Cpi96.PARTITION_END);
    return this;
  }

  getCpi() {
    let partition = Cpi96.PARTITIONS[this.getPartition()];
    let companyPrefix = super.getSegmentString(partition.a);
    let asset = super.getSegment(partition.b);
    return companyPrefix + asset;
  }

  setCpi(cpi) {
    // ean
    let partition = Cpi96.PARTITIONS[this.getPartition()];
    super.setSegment(cpi.substring(0, partition.a.digits), partition.a);
    let tmp = partition.a.digits + partition.b.digits;
    super.setSegment(cpi.substring(partition.a.digits, tmp), partition.b);
    return this;
  }

  getCompanyPrefix() {
    return super.getSegment(Cpi96.PARTITIONS[this.getPartition()].a);
  }

  setCompanyPrefix(value) {
    super.setSegment(value, Cpi96.PARTITIONS[this.getPartition()].a);
    return this;
  }

  getPartReference() {
    return super.getSegment(Cpi96.PARTITIONS[this.getPartition()].b);
  }

  setPartReference(value) {
    super.setSegment(value, Cpi96.PARTITIONS[this.getPartition()].b);
    return this;
  }

  getSerial() {
    return super.get(Cpi96.SERIAL_OFFSET, Cpi96.SERIAL_END);
  }

  setSerial(value) {
    if (value > Cpi96.MAX_SERIAL)
      throw new Error(`Value '${value}' out of range (min: 0, max: ${Cpi96.MAX_SERIAL})`);
    super.set(value, Cpi96.SERIAL_OFFSET, Cpi96.SERIAL_END);
    return this;
  }
}

Cpi96.EPC_HEADER = 0x3c;

Cpi96.TOTAL_BITS = 96;
Cpi96.PARTITION_OFFSET = 11;
Cpi96.PARTITION_END = 14;
Cpi96.SERIAL_OFFSET = 65;
Cpi96.SERIAL_END = Cpi96.TOTAL_BITS;
Cpi96.SERIAL_BITS = 31;
Cpi96.MAX_SERIAL = Utils.getMaxValue(Cpi96.SERIAL_BITS);

Cpi96.TAG_URI = 'cpi-96';

Cpi96.TAG_URI_TEMPLATE = (filter, company, part, serial) => {
  return `urn:epc:tag:${this.TAG_URI}:${filter}.${company}.${part}.${serial}`;
}; // F.C.P.S (Filter, Company, Part, Serial)
Cpi96.PID_URI_TEMPLATE = (company, part, serial) => {
  return `urn:epc:id:cpi:${company}.${part}.${serial}`;
}; // C.P.S   (Company, Part, Serial)

// Partition table columns: Company prefix, Item Reference
Cpi96.PARTITIONS = [
  new Partition(Cpi96.PARTITION_END, 40, 12, 11, 3), // 0 40 12 11 3
  new Partition(Cpi96.PARTITION_END, 37, 11, 14, 4), // 1 37 11 14 4
  new Partition(Cpi96.PARTITION_END, 34, 10, 17, 5), // 2 34 10 17 5
  new Partition(Cpi96.PARTITION_END, 30, 9, 21, 6), // 3 30 09 21 6
  new Partition(Cpi96.PARTITION_END, 27, 8, 24, 7), // 4 27 08 24 7
  new Partition(Cpi96.PARTITION_END, 24, 7, 27, 8), // 5 24 07 27 8
  new Partition(Cpi96.PARTITION_END, 20, 6, 31, 9),
]; // 6 20 06 31 9