91 lines
2.8 KiB
JavaScript
91 lines
2.8 KiB
JavaScript
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/**
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* @typedef {import('estree-jsx').AssignmentProperty} AssignmentProperty
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* @typedef {import('estree-jsx').ExportSpecifier} ExportSpecifier
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* @typedef {import('estree-jsx').Expression} Expression
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* @typedef {import('estree-jsx').Identifier} Identifier
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* @typedef {import('estree-jsx').ImportDefaultSpecifier} ImportDefaultSpecifier
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* @typedef {import('estree-jsx').ImportNamespaceSpecifier} ImportNamespaceSpecifier
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* @typedef {import('estree-jsx').ImportSpecifier} ImportSpecifier
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* @typedef {import('estree-jsx').VariableDeclarator} VariableDeclarator
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*/
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import {create} from './estree-util-create.js'
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/**
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* @param {Array<ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier | ExportSpecifier>} specifiers
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* @param {Expression} init
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* @returns {Array<VariableDeclarator>}
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*/
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export function specifiersToDeclarations(specifiers, init) {
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let index = -1
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/** @type {Array<VariableDeclarator>} */
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const declarations = []
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/** @type {Array<ImportSpecifier | ImportDefaultSpecifier | ExportSpecifier>} */
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const otherSpecifiers = []
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// Can only be one according to JS syntax.
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/** @type {ImportNamespaceSpecifier | undefined} */
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let importNamespaceSpecifier
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while (++index < specifiers.length) {
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const specifier = specifiers[index]
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if (specifier.type === 'ImportNamespaceSpecifier') {
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importNamespaceSpecifier = specifier
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} else {
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otherSpecifiers.push(specifier)
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}
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}
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if (importNamespaceSpecifier) {
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/** @type {VariableDeclarator} */
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const declarator = {
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type: 'VariableDeclarator',
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id: importNamespaceSpecifier.local,
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init
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}
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create(importNamespaceSpecifier, declarator)
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declarations.push(declarator)
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}
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declarations.push({
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type: 'VariableDeclarator',
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id: {
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type: 'ObjectPattern',
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properties: otherSpecifiers.map((specifier) => {
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/** @type {Identifier} */
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let key =
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specifier.type === 'ImportSpecifier'
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? specifier.imported
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: specifier.type === 'ExportSpecifier'
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? specifier.exported
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: {type: 'Identifier', name: 'default'}
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let value = specifier.local
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// Switch them around if we’re exporting.
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if (specifier.type === 'ExportSpecifier') {
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value = key
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key = specifier.local
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}
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/** @type {AssignmentProperty} */
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const property = {
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type: 'Property',
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kind: 'init',
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shorthand: key.name === value.name,
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method: false,
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computed: false,
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key,
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value
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}
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create(specifier, property)
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return property
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})
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},
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init: importNamespaceSpecifier
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? {type: 'Identifier', name: importNamespaceSpecifier.local.name}
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: init
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})
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return declarations
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}
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