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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| import * as parser from '@babel/parser'; | ||
| import traverse from '@babel/traverse'; | ||
| import { CodeLocation } from '@component-controls/specification'; | ||
| import { sourceLocation } from './utils'; | ||
|
|
||
| interface ExportType { | ||
| path: any; | ||
| node: any; | ||
| name: string; | ||
| exportedAs?: string; | ||
| loc: CodeLocation; | ||
| type: 'function' | 'indentifier'; | ||
| } | ||
|
|
||
| export interface NamedExportTypes { | ||
| [key: string]: ExportType; | ||
| } | ||
| export interface ExportTypes { | ||
| default?: ExportType; | ||
| named: NamedExportTypes; | ||
| } | ||
| export const traverseExports = (results: ExportTypes) => { | ||
| const globals: NamedExportTypes = {}; | ||
| const localExports: NamedExportTypes = {}; | ||
|
|
||
| const extractArrowFunction = ( | ||
| path: any, | ||
| declaration: any, | ||
| ): ExportType | undefined => { | ||
| if ( | ||
| declaration.init && | ||
| declaration.init.type === 'ArrowFunctionExpression' | ||
| ) { | ||
| const name = declaration.id.name; | ||
| const exportType: ExportType = { | ||
| loc: sourceLocation(declaration.init.body.loc), | ||
| name, | ||
| path, | ||
| node: path.node, | ||
| type: 'function', | ||
| }; | ||
| return exportType; | ||
| } | ||
| return undefined; | ||
| }; | ||
| return { | ||
| ExportDefaultDeclaration: (path: any) => { | ||
| results.default = { | ||
| name: 'default', | ||
| path, | ||
| node: path.node.declaration, | ||
| loc: sourceLocation(path.node.loc), | ||
| type: 'indentifier', | ||
| }; | ||
| }, | ||
| AssignmentExpression: (path: any) => { | ||
| const node = path.node; | ||
| if ( | ||
| node.left.type === 'MemberExpression' && | ||
| node.left.property.type === 'Identifier' && | ||
| node.left.property.name === 'story' && | ||
| node.right.type === 'ObjectExpression' | ||
| ) { | ||
| const name = node.left.object.name; | ||
| globals[name] = { | ||
| loc: sourceLocation(node.loc), | ||
| path, | ||
| node: node.right, | ||
| name, | ||
| type: 'indentifier', | ||
| }; | ||
|
|
||
| const parsed = results.named[name]; | ||
|
|
||
| if (parsed) { | ||
| parsed.name = name; | ||
| } | ||
| } | ||
| }, | ||
| VariableDeclaration: (path: any) => { | ||
| const { declarations } = path.node; | ||
| if (Array.isArray(declarations) && declarations.length > 0) { | ||
| const declaration = declarations[0]; | ||
| if (declaration) { | ||
| const name = declaration.id.name; | ||
| //check if it was a named export | ||
| if (!results.named[name]) { | ||
| const namedExport = extractArrowFunction(path, declaration); | ||
| if (namedExport && namedExport.name) { | ||
| localExports[namedExport.name] = namedExport; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| ExportSpecifier: (path: any) => { | ||
| const { node } = path; | ||
| const localName = node.local.name; | ||
| const exportedName = node.exported.name; | ||
| const namedExport = localExports[localName]; | ||
| if (namedExport) { | ||
| const global = globals[localName]; | ||
| if (global) { | ||
| namedExport.name = global.name; | ||
| namedExport.path = global.path; | ||
| namedExport.node = global.node; | ||
| namedExport.loc = global.loc; | ||
| } | ||
| results.named[exportedName] = namedExport; | ||
| } | ||
| }, | ||
| ExportNamedDeclaration: (path: any) => { | ||
| const { declaration } = path.node; | ||
| if (declaration) { | ||
| const { declarations } = declaration; | ||
|
|
||
| if (Array.isArray(declarations)) { | ||
| declarations.forEach(declaration => { | ||
| const namedExport = extractArrowFunction(path, declaration); | ||
| if (namedExport) { | ||
| const name = namedExport.name || ''; | ||
| const global = globals[name]; | ||
| if (global) { | ||
| namedExport.name = global.name; | ||
| namedExport.path = global.path; | ||
| namedExport.node = global.node; | ||
| namedExport.loc = global.loc; | ||
| } | ||
| results.named[name] = namedExport; | ||
| } | ||
| }); | ||
| } | ||
| } | ||
| }, | ||
| }; | ||
| }; | ||
|
|
||
| const cleanExportType = (exportType?: ExportType) => { | ||
| return exportType | ||
| ? { | ||
| name: exportType.name, | ||
| exportedAs: exportType.exportedAs, | ||
| loc: exportType.loc, | ||
| } | ||
| : undefined; | ||
| }; | ||
| export const extractExports = ( | ||
| source: string, | ||
| parserOptions?: parser.ParserOptions, | ||
| ) => { | ||
| const results: ExportTypes = { | ||
| named: {}, | ||
| }; | ||
| const ast = parser.parse(source, parserOptions); | ||
|
|
||
| traverse(ast, traverseExports(results)); | ||
| return { | ||
| default: cleanExportType(results.default), | ||
| named: Object.keys(results.named).map(key => | ||
| cleanExportType(results.named[key]), | ||
| ), | ||
| }; | ||
| }; |
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