@stormzx/sqlbuilder/dist/fragments/limit.js

A simple sql builder.

"use strict";

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

var _lodash = _interopRequireDefault(require("lodash"));

var _fragment = _interopRequireDefault(require("./fragment"));

var _utils = require("../utils");

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

const NATURAL_NUMBER_PATTERN = /^\d+$/;

class LimitFragment extends _fragment.default {
  #rows = null;
  #offset = 0;

  get priority() {
    return 800;
  }

  get sql() {
    return `limit ${this.#offset}, ${this.#rows}`;
  }

  get countSql() {
    return '';
  }

  limit(offset, rows) {
    if (_lodash.default.isObject(offset)) {
      let pagination = offset;
      let page = pagination.page ?? 1;
      let size = (pagination.size || pagination.pageSize) ?? 10;

      if (!NATURAL_NUMBER_PATTERN.test(page) || !NATURAL_NUMBER_PATTERN.test(size)) {
        throw new Error('Invalid page or size');
      }

      return this.limit((page - 1) * size, size);
    }

    if (rows == undefined) {
      rows = offset;
      offset = 0;
    }

    if (!NATURAL_NUMBER_PATTERN.test(offset) || !NATURAL_NUMBER_PATTERN.test(rows)) {
      throw new Error('offset and rows must be natural number');
    }

    this.#rows = parseInt(rows);
    this.#offset = parseInt(offset);
    return this;
  }

}

exports.default = LimitFragment;