mirror of
https://github.com/joelwmale/webhook-action.git
synced 2024-12-05 05:34:29 +01:00
126 lines
3.8 KiB
JavaScript
126 lines
3.8 KiB
JavaScript
|
/**
|
||
|
* @fileoverview Rule to enforce that all class methods use 'this'.
|
||
|
* @author Patrick Williams
|
||
|
*/
|
||
|
|
||
|
"use strict";
|
||
|
|
||
|
//------------------------------------------------------------------------------
|
||
|
// Requirements
|
||
|
//------------------------------------------------------------------------------
|
||
|
|
||
|
const astUtils = require("./utils/ast-utils");
|
||
|
|
||
|
//------------------------------------------------------------------------------
|
||
|
// Rule Definition
|
||
|
//------------------------------------------------------------------------------
|
||
|
|
||
|
module.exports = {
|
||
|
meta: {
|
||
|
type: "suggestion",
|
||
|
|
||
|
docs: {
|
||
|
description: "enforce that class methods utilize `this`",
|
||
|
category: "Best Practices",
|
||
|
recommended: false,
|
||
|
url: "https://eslint.org/docs/rules/class-methods-use-this"
|
||
|
},
|
||
|
|
||
|
schema: [{
|
||
|
type: "object",
|
||
|
properties: {
|
||
|
exceptMethods: {
|
||
|
type: "array",
|
||
|
items: {
|
||
|
type: "string"
|
||
|
}
|
||
|
}
|
||
|
},
|
||
|
additionalProperties: false
|
||
|
}],
|
||
|
|
||
|
messages: {
|
||
|
missingThis: "Expected 'this' to be used by class {{name}}."
|
||
|
}
|
||
|
},
|
||
|
create(context) {
|
||
|
const config = Object.assign({}, context.options[0]);
|
||
|
const exceptMethods = new Set(config.exceptMethods || []);
|
||
|
|
||
|
const stack = [];
|
||
|
|
||
|
/**
|
||
|
* Initializes the current context to false and pushes it onto the stack.
|
||
|
* These booleans represent whether 'this' has been used in the context.
|
||
|
* @returns {void}
|
||
|
* @private
|
||
|
*/
|
||
|
function enterFunction() {
|
||
|
stack.push(false);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Check if the node is an instance method
|
||
|
* @param {ASTNode} node node to check
|
||
|
* @returns {boolean} True if its an instance method
|
||
|
* @private
|
||
|
*/
|
||
|
function isInstanceMethod(node) {
|
||
|
return !node.static && node.kind !== "constructor" && node.type === "MethodDefinition";
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Check if the node is an instance method not excluded by config
|
||
|
* @param {ASTNode} node node to check
|
||
|
* @returns {boolean} True if it is an instance method, and not excluded by config
|
||
|
* @private
|
||
|
*/
|
||
|
function isIncludedInstanceMethod(node) {
|
||
|
return isInstanceMethod(node) &&
|
||
|
(node.computed || !exceptMethods.has(node.key.name));
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Checks if we are leaving a function that is a method, and reports if 'this' has not been used.
|
||
|
* Static methods and the constructor are exempt.
|
||
|
* Then pops the context off the stack.
|
||
|
* @param {ASTNode} node A function node that was entered.
|
||
|
* @returns {void}
|
||
|
* @private
|
||
|
*/
|
||
|
function exitFunction(node) {
|
||
|
const methodUsesThis = stack.pop();
|
||
|
|
||
|
if (isIncludedInstanceMethod(node.parent) && !methodUsesThis) {
|
||
|
context.report({
|
||
|
node,
|
||
|
messageId: "missingThis",
|
||
|
data: {
|
||
|
name: astUtils.getFunctionNameWithKind(node)
|
||
|
}
|
||
|
});
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Mark the current context as having used 'this'.
|
||
|
* @returns {void}
|
||
|
* @private
|
||
|
*/
|
||
|
function markThisUsed() {
|
||
|
if (stack.length) {
|
||
|
stack[stack.length - 1] = true;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return {
|
||
|
FunctionDeclaration: enterFunction,
|
||
|
"FunctionDeclaration:exit": exitFunction,
|
||
|
FunctionExpression: enterFunction,
|
||
|
"FunctionExpression:exit": exitFunction,
|
||
|
ThisExpression: markThisUsed,
|
||
|
Super: markThisUsed
|
||
|
};
|
||
|
}
|
||
|
};
|