@bazilio-san/af-stream/src/_misc/convert-db-value-2-siddhi.js

Data stream from database table

const moment = require('moment-timezone');

import * as sql from 'mssql';

const isDateType = (sqlType) => {
  switch (sqlType) {
    case sql.DateTime:
    case sql.DateTime2:
    case sql.Time:
    case sql.Date:
    case sql.SmallDateTime:
      return true;
  }
  return false;
};

const isIntType = (sqlType) => {
  switch (sqlType) {
    case sql.TinyInt:
    case sql.SmallInt:
    case sql.Int:
    case sql.BigInt:
      return true;
  }
  return false;
};

const isFloatType = (sqlType) => {
  switch (sqlType) {
    case sql.Decimal:
    case sql.Float:
    case sql.Money:
    case sql.Numeric:
    case sql.SmallMoney:
    case sql.Real:
      return true;
  }
  return false;
};

const convertFunctionForIntLong = (msSqlType) => {
  const _intConv = (v) => {
    if (v == null) {
      return null;
    }
    const val = Number(v);
    return Number.isNaN(val) ? null : val;
  };
  if (isIntType(msSqlType)) {
    return _intConv;
  }
  if (isFloatType(msSqlType)) {
    return (v) => {
      if (v == null) {
        return null;
      }
      const val = Number(v);
      return Number.isNaN(val) ? null : Math.round(val);
    };
  }
  if (isDateType(msSqlType)) {
    return (v) => {
      if (v == null) {
        return null;
      }
      if (v instanceof Date) {
        return +v;
      }
      if (typeof v === 'string') {
        const val = moment(v);
        return val.isValid() ? val.valueOf() : null;
      }
      const val = Number(v);
      return Number.isNaN(val) ? null : Math.round(val);
    };
  }
  return _intConv;
};

const getConvertFunctionDbValueToSiddhi = () => {
  return (v) => (v == null ? null : v);
};

module.exports = getConvertFunctionDbValueToSiddhi;