UNPKG

11.4 kBJavaScriptView Raw
1'use strict';
2
3var _ExportMap = require('../ExportMap');
4
5var _ExportMap2 = _interopRequireDefault(_ExportMap);
6
7var _importDeclaration = require('../importDeclaration');
8
9var _importDeclaration2 = _interopRequireDefault(_importDeclaration);
10
11var _docsUrl = require('../docsUrl');
12
13var _docsUrl2 = _interopRequireDefault(_docsUrl);
14
15function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
16
17//------------------------------------------------------------------------------
18// Rule Definition
19//------------------------------------------------------------------------------
20
21module.exports = {
22 meta: {
23 docs: {
24 url: (0, _docsUrl2.default)('no-named-as-default-member')
25 }
26 },
27
28 create: function (context) {
29
30 const fileImports = new Map();
31 const allPropertyLookups = new Map();
32
33 function handleImportDefault(node) {
34 const declaration = (0, _importDeclaration2.default)(context);
35 const exportMap = _ExportMap2.default.get(declaration.source.value, context);
36 if (exportMap == null) return;
37
38 if (exportMap.errors.length) {
39 exportMap.reportErrors(context, declaration);
40 return;
41 }
42
43 fileImports.set(node.local.name, {
44 exportMap,
45 sourcePath: declaration.source.value
46 });
47 }
48
49 function storePropertyLookup(objectName, propName, node) {
50 const lookups = allPropertyLookups.get(objectName) || [];
51 lookups.push({ node, propName });
52 allPropertyLookups.set(objectName, lookups);
53 }
54
55 function handlePropLookup(node) {
56 const objectName = node.object.name;
57 const propName = node.property.name;
58 storePropertyLookup(objectName, propName, node);
59 }
60
61 function handleDestructuringAssignment(node) {
62 const isDestructure = node.id.type === 'ObjectPattern' && node.init != null && node.init.type === 'Identifier';
63 if (!isDestructure) return;
64
65 const objectName = node.init.name;
66 for (const _ref of node.id.properties) {
67 const key = _ref.key;
68
69 if (key == null) continue; // true for rest properties
70 storePropertyLookup(objectName, key.name, key);
71 }
72 }
73
74 function handleProgramExit() {
75 allPropertyLookups.forEach((lookups, objectName) => {
76 const fileImport = fileImports.get(objectName);
77 if (fileImport == null) return;
78
79 for (const _ref2 of lookups) {
80 const propName = _ref2.propName;
81 const node = _ref2.node;
82
83 // the default import can have a "default" property
84 if (propName === 'default') continue;
85 if (!fileImport.exportMap.namespace.has(propName)) continue;
86
87 context.report({
88 node,
89 message: `Caution: \`${objectName}\` also has a named export ` + `\`${propName}\`. Check if you meant to write ` + `\`import {${propName}} from '${fileImport.sourcePath}'\` ` + 'instead.'
90 });
91 }
92 });
93 }
94
95 return {
96 'ImportDefaultSpecifier': handleImportDefault,
97 'MemberExpression': handlePropLookup,
98 'VariableDeclarator': handleDestructuringAssignment,
99 'Program:exit': handleProgramExit
100 };
101 }
102}; /**
103 * @fileoverview Rule to warn about potentially confused use of name exports
104 * @author Desmond Brand
105 * @copyright 2016 Desmond Brand. All rights reserved.
106 * See LICENSE in root directory for full license.
107 */
108//# 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