56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
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'use strict';
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const {matches, methodCallSelector, arrayPrototypeMethodSelector} = require('./selectors/index.js');
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const {appendArgument} = require('./fix/index.js');
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const MESSAGE_ID = 'require-array-join-separator';
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const messages = {
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[MESSAGE_ID]: 'Missing the separator argument.',
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};
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const selector = matches([
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// `foo.join()`
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methodCallSelector({
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method: 'join',
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argumentsLength: 0,
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includeOptionalMember: true,
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}),
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// `[].join.call(foo)` and `Array.prototype.join.call(foo)`
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[
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methodCallSelector({method: 'call', argumentsLength: 1}),
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arrayPrototypeMethodSelector({path: 'callee.object', method: 'join'}),
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].join(''),
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]);
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/** @param {import('eslint').Rule.RuleContext} context */
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const create = context => {
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const sourceCode = context.getSourceCode();
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return {
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[selector](node) {
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const [penultimateToken, lastToken] = sourceCode.getLastTokens(node, 2);
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const isPrototypeMethod = node.arguments.length === 1;
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return {
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loc: {
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start: penultimateToken.loc[isPrototypeMethod ? 'end' : 'start'],
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end: lastToken.loc.end,
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},
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messageId: MESSAGE_ID,
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/** @param {import('eslint').Rule.RuleFixer} fixer */
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fix: fixer => appendArgument(fixer, node, '\',\'', sourceCode),
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};
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},
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};
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};
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/** @type {import('eslint').Rule.RuleModule} */
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module.exports = {
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create,
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meta: {
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type: 'suggestion',
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docs: {
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description: 'Enforce using the separator argument with `Array#join()`.',
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},
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fixable: 'code',
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messages,
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},
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};
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