76 lines
1.9 KiB
JavaScript
76 lines
1.9 KiB
JavaScript
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/**
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* @fileoverview Require component props to be typed as read-only.
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* @author Luke Zapart
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*/
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'use strict';
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const Components = require('../util/Components');
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const docsUrl = require('../util/docsUrl');
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function isFlowPropertyType(node) {
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return node.type === 'ObjectTypeProperty';
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}
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function isCovariant(node) {
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return node.variance && node.variance.kind === 'plus';
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}
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// ------------------------------------------------------------------------------
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// Rule Definition
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// ------------------------------------------------------------------------------
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module.exports = {
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meta: {
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docs: {
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description: 'Require read-only props.',
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category: 'Stylistic Issues',
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recommended: false,
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url: docsUrl('prefer-read-only-props')
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},
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fixable: 'code',
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schema: []
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},
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create: Components.detect((context, components) => ({
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'Program:exit'() {
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const list = components.list();
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Object.keys(list).forEach((key) => {
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const component = list[key];
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if (!component.declaredPropTypes) {
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return;
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}
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Object.keys(component.declaredPropTypes).forEach((propName) => {
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const prop = component.declaredPropTypes[propName];
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if (!isFlowPropertyType(prop.node)) {
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return;
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}
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if (!isCovariant(prop.node)) {
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context.report({
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node: prop.node,
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message: 'Prop \'{{propName}}\' should be read-only.',
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data: {
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propName
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},
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fix: (fixer) => {
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if (!prop.node.variance) {
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// Insert covariance
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return fixer.insertTextBefore(prop.node, '+');
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}
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// Replace contravariance with covariance
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return fixer.replaceText(prop.node.variance, '+');
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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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};
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