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Viewing file:     renamer.js (3.44 KB)      -rw-r--r--

"use strict";

exports.__esModule = true;

var _classCallCheck2 = require("babel-runtime/helpers/classCallCheck");

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _binding = require("../binding");

var _binding2 = _interopRequireDefault(_binding);

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

var t = _interopRequireWildcard(_babelTypes);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

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

var renameVisitor = {
  ReferencedIdentifier: function ReferencedIdentifier(_ref, state) {
    var node = _ref.node;

    if (node.name === state.oldName) {
      node.name = state.newName;
    }
  },
  Scope: function Scope(path, state) {
    if (!path.scope.bindingIdentifierEquals(state.oldName, state.binding.identifier)) {
      path.skip();
    }
  },
  "AssignmentExpression|Declaration": function AssignmentExpressionDeclaration(path, state) {
    var ids = path.getOuterBindingIdentifiers();

    for (var name in ids) {
      if (name === state.oldName) ids[name].name = state.newName;
    }
  }
};

var Renamer = function () {
  function Renamer(binding, oldName, newName) {
    (0, _classCallCheck3.default)(this, Renamer);

    this.newName = newName;
    this.oldName = oldName;
    this.binding = binding;
  }

  Renamer.prototype.maybeConvertFromExportDeclaration = function maybeConvertFromExportDeclaration(parentDeclar) {
    var exportDeclar = parentDeclar.parentPath.isExportDeclaration() && parentDeclar.parentPath;
    if (!exportDeclar) return;

    var isDefault = exportDeclar.isExportDefaultDeclaration();

    if (isDefault && (parentDeclar.isFunctionDeclaration() || parentDeclar.isClassDeclaration()) && !parentDeclar.node.id) {
      parentDeclar.node.id = parentDeclar.scope.generateUidIdentifier("default");
    }

    var bindingIdentifiers = parentDeclar.getOuterBindingIdentifiers();
    var specifiers = [];

    for (var name in bindingIdentifiers) {
      var localName = name === this.oldName ? this.newName : name;
      var exportedName = isDefault ? "default" : name;
      specifiers.push(t.exportSpecifier(t.identifier(localName), t.identifier(exportedName)));
    }

    if (specifiers.length) {
      var aliasDeclar = t.exportNamedDeclaration(null, specifiers);

      if (parentDeclar.isFunctionDeclaration()) {
        aliasDeclar._blockHoist = 3;
      }

      exportDeclar.insertAfter(aliasDeclar);
      exportDeclar.replaceWith(parentDeclar.node);
    }
  };

  Renamer.prototype.rename = function rename(block) {
    var binding = this.binding,
        oldName = this.oldName,
        newName = this.newName;
    var scope = binding.scope,
        path = binding.path;


    var parentDeclar = path.find(function (path) {
      return path.isDeclaration() || path.isFunctionExpression();
    });
    if (parentDeclar) {
      this.maybeConvertFromExportDeclaration(parentDeclar);
    }

    scope.traverse(block || scope.block, renameVisitor, this);

    if (!block) {
      scope.removeOwnBinding(oldName);
      scope.bindings[newName] = binding;
      this.binding.identifier.name = newName;
    }

    if (binding.type === "hoisted") {}
  };

  return Renamer;
}();

exports.default = Renamer;
module.exports = exports["default"];