@atlaskit/eslint-plugin-design-system/dist/cjs/rules/utils/create-no-exported-rule/check-if-supported-export.js

The essential plugin for use with the Atlassian Design System.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.checkIfSupportedExport = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _contextCompat = require("@atlaskit/eslint-utils/context-compat");
var _isStyledComponent = require("./is-styled-component");
function _createForOfIteratorHelper(r, e) { var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (!t) { if (Array.isArray(r) || (t = _unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) { t && (r = t); var _n = 0, F = function F() {}; return { s: F, n: function n() { return _n >= r.length ? { done: !0 } : { done: !1, value: r[_n++] }; }, e: function e(r) { throw r; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var o, a = !0, u = !1; return { s: function s() { t = t.call(r); }, n: function n() { var r = t.next(); return a = r.done, r; }, e: function e(r) { u = !0, o = r; }, f: function f() { try { a || null == t.return || t.return(); } finally { if (u) throw o; } } }; }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { (0, _defineProperty2.default)(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
var getStack = function getStack(context, node) {
  var _getSourceCode = (0, _contextCompat.getSourceCode)(context),
    scopeManager = _getSourceCode.scopeManager;
  var stack = {
    nodes: [],
    root: node
  };
  var scope;
  for (var current = node; current.type !== 'Program'; current = current.parent) {
    if (!scope) {
      var currentScope = scopeManager.acquire(current);
      if (currentScope) {
        scope = currentScope;
      }
    }
    switch (current.type) {
      case 'ExportDefaultDeclaration':
      case 'ExportNamedDeclaration':
        stack.root = current;
        break;
      case 'VariableDeclarator':
        stack.root = current;
        break;
      case 'ExportSpecifier':
      case 'ObjectExpression':
      case 'VariableDeclaration':
        break;
      default:
        stack.nodes.unshift(current);
    }
  }
  return _objectSpread(_objectSpread({}, stack), {}, {
    scope: scope !== null && scope !== void 0 ? scope : (0, _contextCompat.getScope)(context, node)
  });
};
var matches = function matches(defs, refs) {
  // When there are no defs, the definition is inlined. This must be a match as we know the refs contain the initial
  // definition.
  if (!defs.length) {
    return true;
  }

  // When there are no refs, the reference refers to the entire definition and therefore must be a match.
  if (!refs.length) {
    return true;
  }

  // When both the references and definitions exist, they should match in length
  if (defs.length !== refs.length) {
    return false;
  }
  return defs.every(function (def, i) {
    var ref = refs[i];
    if (def.type === 'Property') {
      // There is a match between the def and the ref when both names match:
      //
      // const fooDef = { bar: '' };
      // const barRef = fooDef.bar
      //
      // There is no match when the ref property does not match the definition key name:
      //
      // const barRef = fooDef.notFound
      return def.key.type === 'Identifier' && ref.type === 'MemberExpression' && ref.property.type === 'Identifier' && ref.property.name === def.key.name;
    }

    // Anything here is either unsupported or should not match...
    return false;
  });
};
var _checkIfSupportedExport = exports.checkIfSupportedExport = function checkIfSupportedExport(context, node, importSources) {
  var _resolved$references;
  var scope = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : (0, _contextCompat.getScope)(context, node);
  // Ignore any expression defined outside of the global or module scope as we have no way of statically analysing them
  if (scope.type !== 'global' && scope.type !== 'module') {
    return {
      isExport: false
    };
  }
  var _getStack = getStack(context, node.parent),
    root = _getStack.root,
    nodes = _getStack.nodes;
  // Exporting a component with a css reference should be allowed
  if ((0, _isStyledComponent.isStyledComponent)(nodes, context, importSources)) {
    return {
      isExport: false
    };
  }
  if (root.type === 'ExportDefaultDeclaration' || root.type === 'ExportNamedDeclaration') {
    return {
      isExport: true,
      node: root
    };
  }
  if (root.type !== 'VariableDeclarator') {
    return {
      isExport: false
    };
  }

  // Find the reference to the variable declarator
  var reference = scope.references.find(function (_ref) {
    var identifier = _ref.identifier;
    return identifier === root.id;
  });
  if (!reference) {
    return {
      isExport: false
    };
  }

  // Iterate through all of the references to the resolved variable declarator node
  var resolved = reference.resolved;
  var _iterator = _createForOfIteratorHelper((_resolved$references = resolved === null || resolved === void 0 ? void 0 : resolved.references) !== null && _resolved$references !== void 0 ? _resolved$references : []),
    _step;
  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      var identifier = _step.value.identifier;
      // Skip references to the root, since it has already been processed above
      if (identifier === root.id) {
        continue;
      }
      var _getStack2 = getStack(context, identifier.parent),
        refs = _getStack2.nodes,
        nextScope = _getStack2.scope;

      // Only validate the resolved reference if it accesses the definition node
      if (matches(nodes, refs.reverse())) {
        // Now validate the identifier reference as a definition
        var validity = _checkIfSupportedExport(context, identifier, importSources, nextScope);
        if (validity.isExport) {
          return validity;
        }
      }
    }
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }
  return {
    isExport: false
  };
};