79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
/*
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* Copyright (c) 2015, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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/**
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* @flow
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*/
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"use strict";
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var isExportsOrModuleAssignment =
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require('../utils/isExportsOrModuleAssignment');
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var isReactCreateClassCall = require('../utils/isReactCreateClassCall');
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var resolveToValue = require('../utils/resolveToValue');
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var ERROR_MULTIPLE_DEFINITIONS =
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'Multiple exported component definitions found.';
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function ignore() {
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return false;
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}
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/**
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* Given an AST, this function tries to find the object expression that is
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* passed to `React.createClass`, by resolving all references properly.
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*/
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function findExportedReactCreateClass(
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ast: ASTNode,
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recast: Object
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): ?NodePath {
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var types = recast.types.namedTypes;
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var definition;
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recast.visit(ast, {
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visitFunctionDeclaration: ignore,
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visitFunctionExpression: ignore,
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visitIfStatement: ignore,
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visitWithStatement: ignore,
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visitSwitchStatement: ignore,
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visitCatchCause: ignore,
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visitWhileStatement: ignore,
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visitDoWhileStatement: ignore,
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visitForStatement: ignore,
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visitForInStatement: ignore,
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visitAssignmentExpression: function(path) {
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// Ignore anything that is not `exports.X = ...;` or
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// `module.exports = ...;`
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if (!isExportsOrModuleAssignment(path)) {
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return false;
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}
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// Resolve the value of the right hand side. It should resolve to a call
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// expression, something like React.createClass
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path = resolveToValue(path.get('right'));
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if (!isReactCreateClassCall(path)) {
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return false;
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}
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if (definition) {
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// If a file exports multiple components, ... complain!
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throw new Error(ERROR_MULTIPLE_DEFINITIONS);
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}
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// We found React.createClass. Lets get cracking!
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var resolvedPath = resolveToValue(path.get('arguments', 0));
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if (types.ObjectExpression.check(resolvedPath.node)) {
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definition = resolvedPath;
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}
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return false;
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}
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});
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return definition;
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}
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module.exports = findExportedReactCreateClass;
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