tedious/lib/data-types/char.js

A TDS driver, for connecting to MS SQLServer databases.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _iconvLite = _interopRequireDefault(require("iconv-lite"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const NULL_LENGTH = Buffer.from([0xFF, 0xFF]);
const Char = {
  id: 0xAF,
  type: 'BIGCHAR',
  name: 'Char',
  maximumLength: 8000,
  declaration: function (parameter) {
    const value = parameter.value;
    let length;

    if (parameter.length) {
      length = parameter.length;
    } else if (value != null) {
      length = value.length || 1;
    } else if (value === null && !parameter.output) {
      length = 1;
    } else {
      length = this.maximumLength;
    }

    if (length < this.maximumLength) {
      return 'char(' + length + ')';
    } else {
      return 'char(' + this.maximumLength + ')';
    }
  },
  // ParameterData<any> is temporary solution. TODO: need to understand what type ParameterData<...> can be.
  resolveLength: function (parameter) {
    const value = parameter.value;

    if (parameter.length != null) {
      return parameter.length;
    } else if (value != null) {
      return value.length || 1;
    } else {
      return this.maximumLength;
    }
  },

  generateTypeInfo(parameter) {
    const buffer = Buffer.alloc(8);
    buffer.writeUInt8(this.id, 0);
    buffer.writeUInt16LE(parameter.length, 1);

    if (parameter.collation) {
      parameter.collation.toBuffer().copy(buffer, 3, 0, 5);
    }

    return buffer;
  },

  generateParameterLength(parameter, options) {
    const value = parameter.value;

    if (value == null) {
      return NULL_LENGTH;
    }

    const buffer = Buffer.alloc(2);
    buffer.writeUInt16LE(value.length, 0);
    return buffer;
  },

  *generateParameterData(parameter, options) {
    if (parameter.value == null) {
      return;
    }

    yield Buffer.from(parameter.value, 'ascii');
  },

  validate: function (value, collation) {
    if (value == null) {
      return null;
    }

    if (typeof value !== 'string') {
      throw new TypeError('Invalid string.');
    }

    if (!collation) {
      throw new Error('No collation was set by the server for the current connection.');
    }

    if (!collation.codepage) {
      throw new Error('The collation set by the server has no associated encoding.');
    }

    return _iconvLite.default.encode(value, collation.codepage);
  }
};
var _default = Char;
exports.default = _default;
module.exports = Char;
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