page-parser-tree/js/createTransformer/index.js

Library to find elements in a dynamic web page

"use strict";

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = createTransformer;

var _transducers = _interopRequireDefault(require("transducers.js"));

var _transduce = _interopRequireDefault(require("live-set/transduce"));

var _filter = _interopRequireDefault(require("live-set/filter"));

var _merge = _interopRequireDefault(require("live-set/merge"));

var _createCssFn = _interopRequireDefault(require("./createCssFn"));

var _watchMutations = _interopRequireDefault(require("./watchMutations"));

var _watchFilteredChildren = _interopRequireDefault(require("./watchFilteredChildren"));

function createTransformer(scheduler, selectors) {
  var transformers = selectors.map(function (item) {
    if (typeof item === 'string') {
      var condFn = (0, _createCssFn["default"])(item);
      return function (liveSet) {
        return (0, _watchFilteredChildren["default"])(liveSet, condFn);
      };
    } else if (item.$or) {
      var _transformers = item.$or.map(function (s) {
        return createTransformer(scheduler, s);
      });

      return function (liveSet) {
        return (0, _merge["default"])(_transformers.map(function (transformer) {
          return transformer(liveSet);
        }));
      };
    } else if (item.$watch) {
      var _item$$watch = item.$watch,
          attributeFilter = _item$$watch.attributeFilter,
          cond = _item$$watch.cond;

      var _condFn = typeof cond === 'function' ? cond : (0, _createCssFn["default"])(cond);

      return function (liveSet) {
        return (0, _watchMutations["default"])(liveSet, attributeFilter, _condFn);
      };
    } else if (item.$log) {
      var $log = item.$log;

      var filterFn = function filterFn(value) {
        console.log($log, value.el); //eslint-disable-line no-console

        return true;
      };

      return function (liveSet) {
        return (0, _filter["default"])(liveSet, filterFn);
      };
    } else if (item.$filter) {
      var $filter = item.$filter;

      var _filterFn = function _filterFn(_ref) {
        var el = _ref.el;
        return $filter(el);
      };

      return function (liveSet) {
        return (0, _filter["default"])(liveSet, _filterFn);
      };
    } else if (item.$map) {
      var $map = item.$map;

      var transducer = _transducers["default"].compose(_transducers["default"].map(function (ec) {
        return {
          el: $map(ec.el),
          parents: ec.parents
        };
      }), _transducers["default"].filter(function (ec) {
        return ec.el != null;
      }));

      return function (liveSet) {
        return (0, _transduce["default"])(liveSet, transducer);
      };
    }

    throw new Error("Invalid selector item: ".concat(JSON.stringify(item)));
  });
  return transformers.reduce(function (combined, transformer) {
    return function (liveSet) {
      return transformer(combined(liveSet));
    };
  }, function (x) {
    return x;
  });
}

module.exports = exports.default;
module.exports.default = exports.default;
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