mvom/dataTransformers/NumberDataTransformer.js

Multivalue Object Mapper

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _errors = require("../errors");
/**
 * Number Data Transformer
 * @throws {@link InvalidParameterError} An invalid parameter was passed to the function
 */
class NumberDataTransformer {
  /** Number of implied decimals in database storage */

  constructor(dbDecimals = 0) {
    if (!Number.isInteger(dbDecimals) || dbDecimals < 0) {
      throw new _errors.InvalidParameterError({
        parameterName: 'definition.dbDecimals'
      });
    }
    this.dbDecimals = dbDecimals;
  }

  /**
   * Transform mv style internally formatted numeric data (nnnnn) to externally formatted numeric data (nnn.nn)
   * @throws {@link TransformDataError} Database value could not be transformed to external format
   */

  transformFromDb(value) {
    if (value == null) {
      return null;
    }
    const castValue = Number(value);
    if (!Number.isFinite(castValue)) {
      throw new _errors.TransformDataError({
        transformClass: this.constructor.name,
        transformValue: value
      });
    }
    return Number((Math.round(castValue) / 10 ** this.dbDecimals).toFixed(this.dbDecimals));
  }

  /** Transform externally formatted numeric data (nnn.nn) to mv style internally formatted numeric data */

  transformToDb(value) {
    return value == null ? null : (Number(value) * 10 ** this.dbDecimals).toFixed(0);
  }

  /** Transform query constants to u2 formatted string number */
  transformToQuery(value) {
    return String(value);
  }
}
var _default = exports.default = NumberDataTransformer;