@graffy/common/build/query.js

Common libraries that used by various Graffy modules.

"use strict";

var _interopRequireDefault = require("@babel/runtime-corejs3/helpers/interopRequireDefault");

exports.__esModule = true;
exports.query = query;

var _keys = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/object/keys"));

var _sort = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/instance/sort"));

var _map = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/instance/map"));

var _extends2 = _interopRequireDefault(require("@babel/runtime-corejs3/helpers/extends"));

var _isArray = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/array/is-array"));

var _freeze = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/object/freeze"));

var _encode = require("../encode");

var _graph = require("../graph");

var FALLBACK_PAGE_SIZE = 4096;

function pageToRange(page) {
  var node = {};
  node.key = typeof page.after !== 'undefined' ? (0, _encode.key)(page.after) : '';
  node.end = typeof page.before !== 'undefined' ? (0, _encode.key)(page.before) : "\uFFFF";
  node.count = page.first || -page.last || FALLBACK_PAGE_SIZE;
  if (page.excludeAfter) node.key = (0, _graph.keyAfter)(node.key);
  if (page.excludeBefore) node.end = (0, _graph.keyBefore)(node.end);
  return node;
} // We freeze constructed queries to guard against bugs that might mutate them.
// TODO: Don't freeze in production builds, as a perf optimization.


var freeze = function freeze(obj) {
  return (0, _freeze["default"])(obj);
};

function makeQuery(value, version) {
  if ((0, _isArray["default"])(value)) {
    if (value.length === 1) value.unshift({});
    return freeze({
      children: freeze([freeze((0, _extends2["default"])({}, pageToRange(value[0]), {}, makeQuery(value[1], version)))]),
      version: version
    });
  } else if (typeof value === 'object' && value) {
    var _context, _context2;

    return freeze({
      version: version,
      children: freeze((0, _map["default"])(_context = (0, _sort["default"])(_context2 = (0, _keys["default"])(value)).call(_context2)).call(_context, function (key) {
        return freeze((0, _extends2["default"])({
          key: key
        }, makeQuery(value[key], version)));
      }))
    });
  } else {
    return freeze({
      version: version,
      value: typeof value === 'number' ? value : 1
    });
  }
}

function query(obj, version) {
  if (version === void 0) {
    version = 0;
  }

  return makeQuery(obj, version).children;
}