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- 'use strict';
- const {
- removeParentheses,
- removeMemberExpressionProperty,
- } = require('./fix/index.js');
- const MESSAGE_ID = 'no-await-expression-member';
- const messages = {
- [MESSAGE_ID]: 'Do not access a member directly from an await expression.',
- };
- /** @param {import('eslint').Rule.RuleContext} context */
- const create = context => {
- const sourceCode = context.getSourceCode();
- return {
- 'MemberExpression[object.type="AwaitExpression"]'(memberExpression) {
- const {property} = memberExpression;
- const problem = {
- node: property,
- messageId: MESSAGE_ID,
- };
- // `const foo = (await bar)[0]`
- if (
- memberExpression.computed
- && !memberExpression.optional
- && property.type === 'Literal'
- && (property.value === 0 || property.value === 1)
- && memberExpression.parent.type === 'VariableDeclarator'
- && memberExpression.parent.init === memberExpression
- && memberExpression.parent.id.type === 'Identifier'
- ) {
- problem.fix = function * (fixer) {
- const variable = memberExpression.parent.id;
- yield fixer.insertTextBefore(variable, property.value === 0 ? '[' : '[, ');
- yield fixer.insertTextAfter(variable, ']');
- yield removeMemberExpressionProperty(fixer, memberExpression, sourceCode);
- yield * removeParentheses(memberExpression.object, fixer, sourceCode);
- };
- return problem;
- }
- // `const foo = (await bar).foo`
- if (
- !memberExpression.computed
- && !memberExpression.optional
- && property.type === 'Identifier'
- && memberExpression.parent.type === 'VariableDeclarator'
- && memberExpression.parent.init === memberExpression
- && memberExpression.parent.id.type === 'Identifier'
- && memberExpression.parent.id.name === property.name
- ) {
- problem.fix = function * (fixer) {
- const variable = memberExpression.parent.id;
- yield fixer.insertTextBefore(variable, '{');
- yield fixer.insertTextAfter(variable, '}');
- yield removeMemberExpressionProperty(fixer, memberExpression, sourceCode);
- yield * removeParentheses(memberExpression.object, fixer, sourceCode);
- };
- return problem;
- }
- return problem;
- },
- };
- };
- /** @type {import('eslint').Rule.RuleModule} */
- module.exports = {
- create,
- meta: {
- type: 'suggestion',
- docs: {
- description: 'Forbid member access from await expression.',
- },
- fixable: 'code',
- schema: [],
- messages,
- },
- };
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