@graffy/common/decorate/decorate.js

Common libraries that used by various Graffy modules.

"use strict";

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

exports.__esModule = true;
exports.descend = descend;
exports["default"] = decorate;

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

var _getIterator2 = _interopRequireDefault(require("@babel/runtime-corejs3/core-js/get-iterator"));

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

var _getIteratorMethod2 = _interopRequireDefault(require("@babel/runtime-corejs3/core-js/get-iterator-method"));

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

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

var _defineProperty = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/object/define-property"));

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

var _symbol = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/symbol"));

var _node = require("../node");

var _pageInfo = _interopRequireDefault(require("./pageInfo"));

function _createForOfIteratorHelperLoose(o) { var _context2; var i = 0; if (typeof _symbol["default"] === "undefined" || (0, _getIteratorMethod2["default"])(o) == null) { if ((0, _isArray["default"])(o) || (o = _unsupportedIterableToArray(o))) return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } i = (0, _getIterator2["default"])(o); return (0, _bind["default"])(_context2 = i.next).call(_context2, i); }

function _unsupportedIterableToArray(o, minLen) { var _context; if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = (0, _slice["default"])(_context = Object.prototype.toString.call(o)).call(_context, 8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return (0, _from["default"])(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

var LINK_PLACEHOLDER = (0, _symbol["default"])();

function descend(tree, path) {
  var node = tree;

  for (var _iterator = _createForOfIteratorHelperLoose(path), _step; !(_step = _iterator()).done;) {
    var key = _step.value;
    if (!node) return;
    if (!(key in node)) return undefined;
    node = node[key];
  }

  return node;
}

function decorate(graph, links) {
  if (links === void 0) {
    links = [];
  }

  var result = graph && decorateChildren(graph, links);
  var link;

  while (link = links.shift()) {
    var _link = link,
        from = _link[0],
        key = _link[1],
        path = _link[2];
    var node = descend(result, path);

    if (node === LINK_PLACEHOLDER) {
      // Try this link again later. This is to resolve multi-hop links.
      // TODO: Cycle detection.
      links.push(link);
    } else {
      // if (typeof node === 'undefined' || node === null) {
      //   console.warn('Decorate: Link', path, 'is', node);
      // }
      from[key] = node;
    }
  }

  return result;
}

function decorateChildren(graph, links) {
  var isPage = (0, _some["default"])(graph).call(graph, function (node) {
    return (0, _node.isRange)(node) && node.key !== node.end;
  });

  if (isPage) {
    return decoratePage(graph, links);
  } else {
    return decorateBranch(graph, links);
  }
}

function decoratePage(graph, links) {
  var result = [];

  for (var _iterator2 = _createForOfIteratorHelperLoose(graph), _step2; !(_step2 = _iterator2()).done;) {
    var node = _step2.value;
    if ((0, _node.isRange)(node)) continue;

    if ((0, _node.isLink)(node)) {
      links.push([result, result.length, node.path]);
      result.push(LINK_PLACEHOLDER); // Placeholder that will read replaced.

      continue;
    }

    if ((0, _node.isBranch)(node)) {
      result.push(decorateChildren(node.children, links));
      continue;
    }

    result.push(node.value);
  }

  (0, _defineProperty["default"])(result, 'pageInfo', {
    value: (0, _pageInfo["default"])(graph)
  }); // result.pageInfo = pageInfo(graph);

  return result;
}

function decorateBranch(graph, links) {
  var result = {};

  for (var _iterator3 = _createForOfIteratorHelperLoose(graph), _step3; !(_step3 = _iterator3()).done;) {
    var node = _step3.value;
    var key = node.key;

    if ((0, _node.isRange)(node)) {
      result[key] = null;
      continue;
    }

    if ((0, _node.isLink)(node)) {
      links.push([result, key, node.path]);
      result[key] = LINK_PLACEHOLDER;
      continue;
    }

    if ((0, _node.isBranch)(node)) {
      result[key] = decorateChildren(node.children, links);
      continue;
    }

    if (node.value !== null) result[key] = node.value;
  }

  return result;
}