no-set-state.js
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/**
* @fileoverview Prevent usage of setState
* @author Mark Dalgleish
*/
'use strict';
const Components = require('../util/Components');
const docsUrl = require('../util/docsUrl');
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: 'Prevent usage of setState',
category: 'Stylistic Issues',
recommended: false,
url: docsUrl('no-set-state')
},
schema: []
},
create: Components.detect((context, components, utils) => {
/**
* Checks if the component is valid
* @param {Object} component The component to process
* @returns {Boolean} True if the component is valid, false if not.
*/
function isValid(component) {
return Boolean(component && !component.useSetState);
}
/**
* Reports usages of setState for a given component
* @param {Object} component The component to process
*/
function reportSetStateUsages(component) {
let setStateUsage;
for (let i = 0, j = component.setStateUsages.length; i < j; i++) {
setStateUsage = component.setStateUsages[i];
context.report({
node: setStateUsage,
message: 'Do not use setState'
});
}
}
// --------------------------------------------------------------------------
// Public
// --------------------------------------------------------------------------
return {
CallExpression(node) {
const callee = node.callee;
if (
callee.type !== 'MemberExpression'
|| callee.object.type !== 'ThisExpression'
|| callee.property.name !== 'setState'
) {
return;
}
const component = components.get(utils.getParentComponent());
const setStateUsages = (component && component.setStateUsages) || [];
setStateUsages.push(callee);
components.set(node, {
useSetState: true,
setStateUsages
});
},
'Program:exit'() {
const list = components.list();
Object.keys(list).filter((component) => !isValid(list[component])).forEach((component) => {
reportSetStateUsages(list[component]);
});
}
};
})
};