@ombori/epc-ean/src/epc/giai/giai202.js

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

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

export class Giai202 extends Epc {
  constructor(hexEpc) {
    super(Giai202.TOTAL_BITS);
    if (hexEpc) {
      super.setFromHexString(hexEpc);
    } else {
      super.set(Giai202.EPC_HEADER, Epc.EPC_HEADER_OFFSET, Epc.EPC_HEADER_END);
    }
  }

  clone() {
    return new Giai202().setFromBitArray(this);
  }

  getType() {
    return Type.GIAI202;
  }

  toTagURI() {
    // F.C.A (Filter, Company, Asset)
    let partition = Giai202.PARTITIONS[this.getPartition()];
    return Giai202.TAG_URI_TEMPLATE(
      this.getFilter(),
      this.getSegmentString(partition.a),
      this.getSegment(partition.b),
    );
  }

  toIdURI() {
    // C.A (Company, Asset)
    let partition = Giai202.PARTITIONS[this.getPartition()];
    return Giai202.PID_URI_TEMPLATE(
      this.getSegmentString(partition.a),
      this.getSegment(partition.b),
    );
  }

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

  getTotalBits() {
    return Giai202.TOTAL_BITS;
  }

  getHeader() {
    return Giai202.EPC_HEADER;
  }

  getPartition() {
    return super.get(Giai202.PARTITION_OFFSET, Giai202.PARTITION_END);
  }

  setPartition(value) {
    if (value < 0 || value >= Giai202.PARTITIONS.length) {
      throw new Error(
        `Value '${value}' out of range (min: 0, max: ${Giai202.PARTITIONS.length - 1})`,
      );
    }
    super.set(value, Giai202.PARTITION_OFFSET, Giai202.PARTITION_END);
    return this;
  }

  getGiai() {
    let partition = Giai202.PARTITIONS[this.getPartition()];
    let companyPrefix = super.getSegmentString(partition.a);
    let asset = super.getSegment(partition.b);
    return companyPrefix + asset;
  }

  setGiai(giai) {
    let partition = Giai202.PARTITIONS[this.getPartition()];
    super.setSegment(giai.substring(0, partition.a.digits), partition.a);
    let tmp = partition.a.digits + partition.b.digits;
    super.setSegment(giai.substring(partition.a.digits, tmp), partition.b);
    return this;
  }

  getCompanyPrefix() {
    return super.getSegment(Giai202.PARTITIONS[this.getPartition()].a);
  }

  setCompanyPrefix(value) {
    super.setSegment(value, Giai202.PARTITIONS[this.getPartition()].a);
    return this;
  }

  getAssetReference() {
    return super.getSegment(Giai202.PARTITIONS[this.getPartition()].b);
  }

  setAssetReference(value) {
    super.setSegment(value, Giai202.PARTITIONS[this.getPartition()].b);
    return this;
  }

  fromTagURI(uri) {
    const value = uri.split(':');
    try {
      if (value[3] === this.TAG_URI) {
        const data = value[4].split('.');
        const result = new Giai202();
        result.setFilter(parseInt(data[0]));
        result.setPartition(12 - data[1].length);
        result.setCompanyPrefix(parseInt(data[1]));
        result.setAssetReference(parseInt(data[2]));
        return result;
      }
    } catch (e) {
      // console.log(e)
    }
    throw new Error(`${uri} is not a known EPC tag URI scheme`);
  }
}

Giai202.EPC_HEADER = 0x38;

Giai202.TOTAL_BITS = 202;
Giai202.PARTITION_OFFSET = 11;
Giai202.PARTITION_END = 14;

Giai202.TAG_URI = 'giai-202';

Giai202.TAG_URI_TEMPLATE = (filter, company, asset) => {
  return `urn:epc:tag:${this.TAG_URI}:${filter}.${company}.${asset}`;
}; // F.C.A (Filter, Company, Asset)
Giai202.PID_URI_TEMPLATE = (company, asset) => {
  return `urn:epc:id:giai:${company}.${asset}`;
}; // C.A (Company, Asset)

// Partition table columns: Company prefix, Asset Type
Giai202.PARTITIONS = [
  new Partition(Giai202.PARTITION_END, 40, 12, 148, 18), // 0 40 12 148 18
  new Partition(Giai202.PARTITION_END, 37, 11, 151, 19), // 1 37 11 151 19
  new Partition(Giai202.PARTITION_END, 34, 10, 154, 20), // 2 34 10 154 20
  new Partition(Giai202.PARTITION_END, 30, 9, 158, 21), // 3 30 09 158 21
  new Partition(Giai202.PARTITION_END, 27, 8, 161, 22), // 4 27 08 161 22
  new Partition(Giai202.PARTITION_END, 24, 7, 164, 23), // 5 24 07 164 23
  new Partition(Giai202.PARTITION_END, 20, 6, 168, 24),
]; // 6 20 06 168 24