mirror of
https://github.com/n8n-io/n8n.git
synced 2024-12-25 04:34:06 -08:00
539 lines
14 KiB
JavaScript
539 lines
14 KiB
JavaScript
'use strict';
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const path = require('path');
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/**
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* This file contains any locally defined ESLint rules. They are picked up by
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* eslint-plugin-n8n-local-rules and exposed as 'n8n-local-rules/<rule-name>'.
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*/
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module.exports = {
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/**
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* A rule to detect calls to JSON.parse() that are not wrapped inside try/catch blocks.
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*
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* Valid:
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* ```js
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* try { JSON.parse(foo) } catch(err) { baz() }
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* ```
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*
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* Invalid:
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* ```js
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* JSON.parse(foo)
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* ```
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*
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* The pattern where an object is cloned with JSON.parse(JSON.stringify()) is allowed
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* (abundant in the n8n codebase):
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*
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* Valid:
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* ```js
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* JSON.parse(JSON.stringify(foo))
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* ```
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*/
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'no-uncaught-json-parse': {
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meta: {
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type: 'problem',
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docs: {
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description:
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'Calls to `JSON.parse()` must be replaced with `jsonParse()` from `n8n-workflow` or surrounded with a try/catch block.',
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recommended: 'error',
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},
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schema: [],
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messages: {
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noUncaughtJsonParse:
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'Use `jsonParse()` from `n8n-workflow` or surround the `JSON.parse()` call with a try/catch block.',
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},
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},
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defaultOptions: [],
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create(context) {
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return {
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CallExpression(node) {
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if (!isJsonParseCall(node)) {
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return;
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}
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if (isJsonStringifyCall(node)) {
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return;
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}
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if (context.getAncestors().find((node) => node.type === 'TryStatement') !== undefined) {
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return;
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}
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// Found a JSON.parse() call not wrapped into a try/catch, so report it
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context.report({
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messageId: 'noUncaughtJsonParse',
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node,
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});
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},
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};
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},
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},
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'no-json-parse-json-stringify': {
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meta: {
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type: 'problem',
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docs: {
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description:
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'Calls to `JSON.parse(JSON.stringify(arg))` must be replaced with `deepCopy(arg)` from `n8n-workflow`.',
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recommended: 'error',
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},
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messages: {
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noJsonParseJsonStringify: 'Replace with `deepCopy({{ argText }})`',
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},
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fixable: 'code',
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},
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create(context) {
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return {
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CallExpression(node) {
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if (isJsonParseCall(node) && isJsonStringifyCall(node)) {
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const [callExpression] = node.arguments;
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const { arguments: args } = callExpression;
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if (!Array.isArray(args) || args.length !== 1) return;
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const [arg] = args;
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if (!arg) return;
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const argText = context.getSourceCode().getText(arg);
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context.report({
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messageId: 'noJsonParseJsonStringify',
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node,
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data: { argText },
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fix: (fixer) => fixer.replaceText(node, `deepCopy(${argText})`),
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});
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}
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},
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};
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},
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},
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'no-unneeded-backticks': {
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meta: {
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type: 'problem',
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docs: {
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description:
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'Template literal backticks may only be used for string interpolation or multiline strings.',
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recommended: 'error',
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},
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messages: {
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noUneededBackticks: 'Use single or double quotes, not backticks',
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},
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fixable: 'code',
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},
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create(context) {
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return {
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TemplateLiteral(node) {
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if (node.expressions.length > 0) return;
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if (node.quasis.every((q) => q.loc.start.line !== q.loc.end.line)) return;
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node.quasis.forEach((q) => {
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const escaped = q.value.raw.replace(/(?<!\\)'/g, "\\'");
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context.report({
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messageId: 'noUneededBackticks',
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node,
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fix: (fixer) => fixer.replaceText(q, `'${escaped}'`),
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});
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});
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},
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};
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},
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},
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'no-unused-param-in-catch-clause': {
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meta: {
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type: 'problem',
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docs: {
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description: 'Unused param in catch clause must be omitted.',
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recommended: 'error',
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},
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messages: {
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removeUnusedParam: 'Remove unused param in catch clause',
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},
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fixable: 'code',
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},
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create(context) {
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return {
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CatchClause(node) {
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if (node.param?.name?.startsWith('_')) {
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const start = node.range[0] + 'catch '.length;
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const end = node.param.range[1] + '()'.length;
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context.report({
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messageId: 'removeUnusedParam',
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node,
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fix: (fixer) => fixer.removeRange([start, end]),
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});
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}
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},
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};
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},
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},
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'no-skipped-tests': {
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meta: {
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type: 'problem',
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docs: {
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description: 'Tests must not be skipped.',
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recommended: 'error',
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},
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messages: {
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removeSkip: 'Remove `.skip()` call',
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removeOnly: 'Remove `.only()` call',
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removeXPrefix: 'Remove `x` prefix',
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},
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fixable: 'code',
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},
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create(context) {
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const TESTING_FUNCTIONS = new Set(['test', 'it', 'describe']);
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const SKIPPING_METHODS = new Set(['skip', 'only']);
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const PREFIXED_TESTING_FUNCTIONS = new Set(['xtest', 'xit', 'xdescribe']);
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const toMessageId = (s) => 'remove' + s.charAt(0).toUpperCase() + s.slice(1);
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return {
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MemberExpression(node) {
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if (
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node.object.type === 'Identifier' &&
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TESTING_FUNCTIONS.has(node.object.name) &&
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node.property.type === 'Identifier' &&
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SKIPPING_METHODS.has(node.property.name)
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) {
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context.report({
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messageId: toMessageId(node.property.name),
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node,
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fix: (fixer) => {
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const [start, end] = node.property.range;
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return fixer.removeRange([start - '.'.length, end]);
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},
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});
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}
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},
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CallExpression(node) {
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if (
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node.callee.type === 'Identifier' &&
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PREFIXED_TESTING_FUNCTIONS.has(node.callee.name)
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) {
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context.report({
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messageId: 'removeXPrefix',
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node,
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fix: (fixer) => fixer.replaceText(node.callee, 'test'),
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});
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}
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},
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};
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},
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},
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'no-interpolation-in-regular-string': {
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meta: {
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type: 'problem',
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docs: {
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description:
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'String interpolation `${...}` requires backticks, not single or double quotes.',
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recommended: 'error',
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},
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messages: {
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useBackticks: 'Use backticks to interpolate',
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},
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fixable: 'code',
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},
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create(context) {
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return {
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Literal(node) {
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if (typeof node.value !== 'string') return;
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if (/\$\{/.test(node.value)) {
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context.report({
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messageId: 'useBackticks',
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node,
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fix: (fixer) => fixer.replaceText(node, `\`${node.value}\``),
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});
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}
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},
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};
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},
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},
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'dangerously-use-html-string-missing': {
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meta: {
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type: 'error',
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docs: {
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description:
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'Calls to the `showToast` and `showMessage` methods must include `dangerouslyUseHTMLString: true` when at least one of the values in `title` or `message` contains HTML.',
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recommended: 'error',
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/**
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* @note This rule does not yet cover cases where the result of calling
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* `this.$locale.someMethod()` is assigned to a variable that is then
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* assigned to `title or `message`, e.g. `message: errorMessage`.
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*/
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},
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},
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create(context) {
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const cwd = context.getCwd();
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const locale = 'src/plugins/i18n/locales/en.json';
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const LOCALE_NAMESPACE = '$locale';
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const LOCALE_FILEPATH = cwd.endsWith('editor-ui')
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? path.join(cwd, locale)
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: path.join(cwd, 'packages/editor-ui', locale);
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let LOCALE_MAP;
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try {
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LOCALE_MAP = JSON.parse(require('fs').readFileSync(LOCALE_FILEPATH));
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} catch {
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console.log(
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'[dangerously-use-html-string-missing] Failed to load locale map, skipping rule...',
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);
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return {};
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}
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const METHODS_POSSIBLY_REQUIRING_HTML = new Set(['showToast', 'showMessage']);
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const PROPERTIES_POSSIBLY_CONTAINING_HTML = new Set(['title', 'message']);
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const USE_HTML_PROPERTY = 'dangerouslyUseHTMLString';
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const isMethodPossiblyRequiringRawHtml = (node) =>
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node.callee.type === 'MemberExpression' &&
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node.callee.object.type === 'ThisExpression' &&
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node.callee.property.type === 'Identifier' &&
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METHODS_POSSIBLY_REQUIRING_HTML.has(node.callee.property.name) &&
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node.arguments.length === 1 &&
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node.arguments.at(0).type === 'ObjectExpression';
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const isPropertyWithLocaleStringAsValue = (property) =>
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property.key.type === 'Identifier' &&
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PROPERTIES_POSSIBLY_CONTAINING_HTML.has(property.key.name) &&
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property.value.type === 'CallExpression' &&
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property.value.callee.type === 'MemberExpression' &&
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property.value.callee.object.type === 'MemberExpression' &&
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property.value.callee.object.property.type === 'Identifier' &&
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property.value.callee.object.property.name === LOCALE_NAMESPACE &&
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property.value.arguments.length >= 1 &&
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property.value.arguments.at(0).type === 'Literal' &&
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typeof property.value.arguments.at(0).value === 'string';
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const containsHtml = (str) => {
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let insideTag = false;
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for (let char of str) {
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if (char === '<') {
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insideTag = true;
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} else if (char === '>') {
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if (insideTag) return true;
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insideTag = false;
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}
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}
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return false;
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};
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return {
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CallExpression(node) {
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if (!isMethodPossiblyRequiringRawHtml(node)) return;
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const arg = node.arguments.at(0);
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const hasArgWitHtml = arg.properties
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.reduce(
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(acc, p) =>
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isPropertyWithLocaleStringAsValue(p)
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? [...acc, p.value.arguments.at(0).value]
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: acc,
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[],
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)
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.some((i) => containsHtml(LOCALE_MAP[i]));
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if (!hasArgWitHtml) return;
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const hasRawHtmlPropertyAsTrue = arg.properties.some(
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(p) =>
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p.key.type === 'Identifier' &&
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p.key.name === USE_HTML_PROPERTY &&
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p.value.type === 'Literal' &&
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p.value.value === true,
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);
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if (hasRawHtmlPropertyAsTrue) return;
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const methodName = node.callee.property.name;
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context.report({
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node,
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message: `Set \`${USE_HTML_PROPERTY}: true\` in the argument to \`${methodName}\`. At least one of the values in \`title\` or \`message\` contains HTML.`,
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});
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},
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};
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},
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},
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'no-plain-errors': {
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meta: {
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type: 'problem',
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docs: {
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description:
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'Only `ApplicationError` (from the `workflow` package) or its child classes must be thrown. This ensures the error will be normalized when reported to Sentry, if applicable.',
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recommended: 'error',
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},
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messages: {
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useApplicationError:
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'Throw an `ApplicationError` (from the `workflow` package) or its child classes.',
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},
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fixable: 'code',
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},
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create(context) {
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return {
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ThrowStatement(node) {
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if (!node.argument) return;
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const isNewError =
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node.argument.type === 'NewExpression' && node.argument.callee.name === 'Error';
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const isNewlessError =
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node.argument.type === 'CallExpression' && node.argument.callee.name === 'Error';
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if (isNewError || isNewlessError) {
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return context.report({
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messageId: 'useApplicationError',
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node,
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fix: (fixer) =>
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fixer.replaceText(
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node,
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`throw new ApplicationError(${node.argument.arguments
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.map((arg) => arg.raw)
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.join(', ')})`,
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),
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});
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}
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},
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};
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},
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},
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'no-dynamic-import-template': {
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meta: {
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type: 'error',
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docs: {
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description:
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'Disallow non-relative imports in template string argument to `await import()`, because `tsc-alias` as of 1.8.7 is unable to resolve aliased paths in this scenario.',
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recommended: true,
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},
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},
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create: function (context) {
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return {
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'AwaitExpression > ImportExpression TemplateLiteral'(node) {
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const templateValue = node.quasis[0].value.cooked;
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if (!templateValue?.startsWith('@/')) return;
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context.report({
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node,
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message:
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'Use relative imports in template string argument to `await import()`, because `tsc-alias` as of 1.8.7 is unable to resolve aliased paths in this scenario.',
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});
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},
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};
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},
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},
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'misplaced-n8n-typeorm-import': {
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meta: {
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type: 'error',
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docs: {
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description:
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'Ensure `@n8n/typeorm` is imported only from within the `packages/cli/src/databases` directory.',
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recommended: 'error',
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},
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messages: {
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moveImport: 'Move this import to `packages/cli/src/databases/**/*.ts`.',
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},
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},
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create(context) {
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return {
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ImportDeclaration(node) {
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if (
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node.source.value === '@n8n/typeorm' &&
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!context.getFilename().includes('packages/cli/src/databases/')
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) {
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context.report({ node, messageId: 'moveImport' });
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}
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},
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};
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},
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},
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'no-type-unsafe-event-emitter': {
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meta: {
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type: 'problem',
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docs: {
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description: 'Disallow extending from `EventEmitter`, which is not type-safe.',
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recommended: 'error',
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},
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messages: {
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noExtendsEventEmitter: 'Extend from the type-safe `TypedEmitter` class instead.',
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},
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},
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create(context) {
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return {
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ClassDeclaration(node) {
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if (
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node.superClass &&
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node.superClass.type === 'Identifier' &&
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node.superClass.name === 'EventEmitter' &&
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node.id.name !== 'TypedEmitter'
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) {
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context.report({
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node: node.superClass,
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messageId: 'noExtendsEventEmitter',
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});
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}
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},
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};
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},
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},
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'no-untyped-config-class-field': {
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meta: {
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type: 'problem',
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docs: {
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description: 'Enforce explicit typing of config class fields',
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recommended: 'error',
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},
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messages: {
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noUntypedConfigClassField:
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'Class field must have an explicit type annotation, e.g. `field: type = value`. See: https://github.com/n8n-io/n8n/pull/10433',
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},
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},
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create(context) {
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return {
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PropertyDefinition(node) {
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if (!node.typeAnnotation) {
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context.report({ node: node.key, messageId: 'noUntypedConfigClassField' });
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}
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},
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};
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},
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},
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};
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|
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const isJsonParseCall = (node) =>
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node.callee.type === 'MemberExpression' &&
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node.callee.object.type === 'Identifier' &&
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node.callee.object.name === 'JSON' &&
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node.callee.property.type === 'Identifier' &&
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node.callee.property.name === 'parse';
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const isJsonStringifyCall = (node) => {
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const parseArg = node.arguments?.[0];
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return (
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parseArg !== undefined &&
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parseArg.type === 'CallExpression' &&
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parseArg.callee.type === 'MemberExpression' &&
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parseArg.callee.object.type === 'Identifier' &&
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parseArg.callee.object.name === 'JSON' &&
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parseArg.callee.property.type === 'Identifier' &&
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parseArg.callee.property.name === 'stringify'
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);
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};
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