@steemit/steem-js/lib/auth/serializer/src/object_id.js

JavaScript library for the Steem blockchain

"use strict";

var Long = require('bytebuffer').Long;
var v = require('./validation');
var DB_MAX_INSTANCE_ID = Long.fromNumber(Math.pow(2, 48) - 1);
class ObjectId {
  constructor(space, type, instance) {
    this.space = space;
    this.type = type;
    this.instance = instance;
    var instance_string = this.instance.toString();
    var object_id = `${this.space}.${this.type}.${instance_string}`;
    if (!v.is_digits(instance_string)) {
      throw new `Invalid object id ${object_id}`();
    }
  }
  static fromString(value) {
    if (value.space !== undefined && value.type !== undefined && value.instance !== undefined) {
      return value;
    }
    var params = v.require_match(/^([0-9]+)\.([0-9]+)\.([0-9]+)$/, v.required(value, "object_id"), "object_id");
    return new ObjectId(parseInt(params[1]), parseInt(params[2]), Long.fromString(params[3]));
  }
  static fromLong(long) {
    var space = long.shiftRight(56).toInt();
    var type = long.shiftRight(48).toInt() & 0x00ff;
    var instance = long.and(DB_MAX_INSTANCE_ID);
    return new ObjectId(space, type, instance);
  }
  static fromByteBuffer(b) {
    return ObjectId.fromLong(b.readUint64());
  }
  toLong() {
    return Long.fromNumber(this.space).shiftLeft(56).or(Long.fromNumber(this.type).shiftLeft(48).or(this.instance));
  }
  appendByteBuffer(b) {
    return b.writeUint64(this.toLong());
  }
  toString() {
    return `${this.space}.${this.type}.${this.instance.toString()}`;
  }
}
module.exports = ObjectId;