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Viewing file:     RowDataPacket.js (3.99 KB)      -rw-r--r--

var Types                        = require('../constants/types');
var Charsets                     = require('../constants/charsets');
var Field                        = require('./Field');
var IEEE_754_BINARY_64_PRECISION = Math.pow(2, 53);

module.exports = RowDataPacket;
function RowDataPacket() {
}

Object.defineProperty(RowDataPacket.prototype, 'parse', {
  configurable : true,
  enumerable   : false,
  value        : parse
});

Object.defineProperty(RowDataPacket.prototype, '_typeCast', {
  configurable : true,
  enumerable   : false,
  value        : typeCast
});

function parse(parser, fieldPackets, typeCast, nestTables, connection) {
  var self = this;
  var next = function () {
    return self._typeCast(fieldPacket, parser, connection.config.timezone, connection.config.supportBigNumbers, connection.config.bigNumberStrings, connection.config.dateStrings);
  };

  for (var i = 0; i < fieldPackets.length; i++) {
    var fieldPacket = fieldPackets[i];
    var value;

    if (typeof typeCast === 'function') {
      value = typeCast.apply(connection, [ new Field({ packet: fieldPacket, parser: parser }), next ]);
    } else {
      value = (typeCast)
        ? this._typeCast(fieldPacket, parser, connection.config.timezone, connection.config.supportBigNumbers, connection.config.bigNumberStrings, connection.config.dateStrings)
        : ( (fieldPacket.charsetNr === Charsets.BINARY)
          ? parser.parseLengthCodedBuffer()
          : parser.parseLengthCodedString() );
    }

    if (typeof nestTables === 'string' && nestTables.length) {
      this[fieldPacket.table + nestTables + fieldPacket.name] = value;
    } else if (nestTables) {
      this[fieldPacket.table] = this[fieldPacket.table] || {};
      this[fieldPacket.table][fieldPacket.name] = value;
    } else {
      this[fieldPacket.name] = value;
    }
  }
}

function typeCast(field, parser, timeZone, supportBigNumbers, bigNumberStrings, dateStrings) {
  var numberString;

  switch (field.type) {
    case Types.TIMESTAMP:
    case Types.TIMESTAMP2:
    case Types.DATE:
    case Types.DATETIME:
    case Types.DATETIME2:
    case Types.NEWDATE:
      var dateString = parser.parseLengthCodedString();

      if (typeMatch(field.type, dateStrings)) {
        return dateString;
      }

      if (dateString === null) {
        return null;
      }

      var originalString = dateString;
      if (field.type === Types.DATE) {
        dateString += ' 00:00:00';
      }

      if (timeZone !== 'local') {
        dateString += ' ' + timeZone;
      }

      var dt = new Date(dateString);
      if (isNaN(dt.getTime())) {
        return originalString;
      }

      return dt;
    case Types.TINY:
    case Types.SHORT:
    case Types.LONG:
    case Types.INT24:
    case Types.YEAR:
    case Types.FLOAT:
    case Types.DOUBLE:
      numberString = parser.parseLengthCodedString();
      return (numberString === null || (field.zeroFill && numberString[0] === '0'))
        ? numberString : Number(numberString);
    case Types.NEWDECIMAL:
    case Types.LONGLONG:
      numberString = parser.parseLengthCodedString();
      return (numberString === null || (field.zeroFill && numberString[0] === '0'))
        ? numberString
        : ((supportBigNumbers && (bigNumberStrings || (Number(numberString) >= IEEE_754_BINARY_64_PRECISION) || Number(numberString) <= -IEEE_754_BINARY_64_PRECISION))
          ? numberString
          : Number(numberString));
    case Types.BIT:
      return parser.parseLengthCodedBuffer();
    case Types.STRING:
    case Types.VAR_STRING:
    case Types.TINY_BLOB:
    case Types.MEDIUM_BLOB:
    case Types.LONG_BLOB:
    case Types.BLOB:
      return (field.charsetNr === Charsets.BINARY)
        ? parser.parseLengthCodedBuffer()
        : parser.parseLengthCodedString();
    case Types.GEOMETRY:
      return parser.parseGeometryValue();
    default:
      return parser.parseLengthCodedString();
  }
}

function typeMatch(type, list) {
  if (Array.isArray(list)) {
    return list.indexOf(Types[type]) !== -1;
  } else {
    return Boolean(list);
  }
}