tedious/lib/data-types/ntext.js

A TDS driver, for connecting to MS SQLServer databases.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
const NULL_LENGTH = Buffer.from([0xFF, 0xFF, 0xFF, 0xFF]);
const NO_COLLATION = Buffer.from([0x00, 0x00, 0x00, 0x00, 0x00]);
const NText = {
  id: 0x63,
  type: 'NTEXT',
  name: 'NText',
  hasTableName: true,
  declaration: function () {
    return 'ntext';
  },
  resolveLength: function (parameter) {
    const value = parameter.value; // Temporary solution. Remove 'any' later.

    if (value != null) {
      return value.length;
    } else {
      return -1;
    }
  },
  writeTypeInfo(buffer, parameter) {
    buffer.writeUInt8(this.id);
    buffer.writeInt32LE(parameter.length);
    if (parameter.collation) {
      buffer.writeBuffer(parameter.collation.toBuffer().subarray(0, 5));
    } else {
      buffer.writeBuffer(NO_COLLATION);
    }
  },
  writeValue(buffer, parameter) {
    if (parameter.value == null) {
      buffer.writeBuffer(NULL_LENGTH);
      return;
    }
    const value = String(parameter.value);
    buffer.writeInt32LE(value.length * 2);
    buffer.writeString(value, 'ucs2');
  },
  validate: function (value) {
    if (value == null) {
      return null;
    }
    if (typeof value !== 'string') {
      throw new TypeError('Invalid string.');
    }
    return value;
  }
};
var _default = exports.default = NText;
module.exports = NText;
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