twreporter-react/node_modules_node_5/babel-helper-explode-class/lib/index.js

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"use strict";

var _getIterator = require("babel-runtime/core-js/get-iterator")["default"];

var _interopRequireDefault = require("babel-runtime/helpers/interop-require-default")["default"];

var _interopRequireWildcard = require("babel-runtime/helpers/interop-require-wildcard")["default"];

exports.__esModule = true;

var _babelHelperBindifyDecorators = require("babel-helper-bindify-decorators");

var _babelHelperBindifyDecorators2 = _interopRequireDefault(_babelHelperBindifyDecorators);

var _babelTypes = require("babel-types");

var t = _interopRequireWildcard(_babelTypes);

/*:: import type { NodePath } from "babel-traverse"*/
exports["default"] = function (classPath) {
  classPath.assertClass();

  var memoisedExpressions = [];

  function maybeMemoise(path) {
    if (!path.node || path.isPure()) return;

    var uid = classPath.scope.generateDeclaredUidIdentifier();
    memoisedExpressions.push(t.assignmentExpression("=", uid, path.node));
    path.replaceWith(uid);
  }

  function memoiseDecorators(paths /*: Array<NodePath>*/) {
    if (!Array.isArray(paths) || !paths.length) return;

    // ensure correct evaluation order of decorators
    paths = paths.reverse();

    // bind decorators if they're member expressions
    _babelHelperBindifyDecorators2["default"](paths);

    for (var _iterator = paths, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _getIterator(_iterator);;) {
      var _ref;

      if (_isArray) {
        if (_i >= _iterator.length) break;
        _ref = _iterator[_i++];
      } else {
        _i = _iterator.next();
        if (_i.done) break;
        _ref = _i.value;
      }

      var path = _ref;

      maybeMemoise(path);
    }
  }

  maybeMemoise(classPath.get("superClass"));
  memoiseDecorators(classPath.get("decorators"), true);

  var methods /*: Array<NodePath>*/ = classPath.get("body.body");
  for (var _iterator2 = methods, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _getIterator(_iterator2);;) {
    var _ref2;

    if (_isArray2) {
      if (_i2 >= _iterator2.length) break;
      _ref2 = _iterator2[_i2++];
    } else {
      _i2 = _iterator2.next();
      if (_i2.done) break;
      _ref2 = _i2.value;
    }

    var methodPath = _ref2;

    if (methodPath.is("computed")) {
      maybeMemoise(methodPath.get("key"));
    }

    if (methodPath.has("decorators")) {
      memoiseDecorators(classPath.get("decorators"));
    }
  }

  if (memoisedExpressions) {
    classPath.insertBefore(memoisedExpressions.map(function (expr) {
      return t.expressionStatement(expr);
    }));
  }
};

module.exports = exports["default"];