104 lines
3.1 KiB
JavaScript
104 lines
3.1 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview Rule to flag when a function has too many parameters
|
||
|
|
* @author Ilya Volodin
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Requirements
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
const lodash = require("lodash");
|
||
|
|
|
||
|
|
const astUtils = require("./utils/ast-utils");
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Rule Definition
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
meta: {
|
||
|
|
type: "suggestion",
|
||
|
|
|
||
|
|
docs: {
|
||
|
|
description: "enforce a maximum number of parameters in function definitions",
|
||
|
|
category: "Stylistic Issues",
|
||
|
|
recommended: false,
|
||
|
|
url: "https://eslint.org/docs/rules/max-params"
|
||
|
|
},
|
||
|
|
|
||
|
|
schema: [
|
||
|
|
{
|
||
|
|
oneOf: [
|
||
|
|
{
|
||
|
|
type: "integer",
|
||
|
|
minimum: 0
|
||
|
|
},
|
||
|
|
{
|
||
|
|
type: "object",
|
||
|
|
properties: {
|
||
|
|
maximum: {
|
||
|
|
type: "integer",
|
||
|
|
minimum: 0
|
||
|
|
},
|
||
|
|
max: {
|
||
|
|
type: "integer",
|
||
|
|
minimum: 0
|
||
|
|
}
|
||
|
|
},
|
||
|
|
additionalProperties: false
|
||
|
|
}
|
||
|
|
]
|
||
|
|
}
|
||
|
|
],
|
||
|
|
messages: {
|
||
|
|
exceed: "{{name}} has too many parameters ({{count}}). Maximum allowed is {{max}}."
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
create(context) {
|
||
|
|
const sourceCode = context.getSourceCode();
|
||
|
|
const option = context.options[0];
|
||
|
|
let numParams = 3;
|
||
|
|
|
||
|
|
if (
|
||
|
|
typeof option === "object" &&
|
||
|
|
(Object.prototype.hasOwnProperty.call(option, "maximum") || Object.prototype.hasOwnProperty.call(option, "max"))
|
||
|
|
) {
|
||
|
|
numParams = option.maximum || option.max;
|
||
|
|
}
|
||
|
|
if (typeof option === "number") {
|
||
|
|
numParams = option;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks a function to see if it has too many parameters.
|
||
|
|
* @param {ASTNode} node The node to check.
|
||
|
|
* @returns {void}
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function checkFunction(node) {
|
||
|
|
if (node.params.length > numParams) {
|
||
|
|
context.report({
|
||
|
|
loc: astUtils.getFunctionHeadLoc(node, sourceCode),
|
||
|
|
node,
|
||
|
|
messageId: "exceed",
|
||
|
|
data: {
|
||
|
|
name: lodash.upperFirst(astUtils.getFunctionNameWithKind(node)),
|
||
|
|
count: node.params.length,
|
||
|
|
max: numParams
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
FunctionDeclaration: checkFunction,
|
||
|
|
ArrowFunctionExpression: checkFunction,
|
||
|
|
FunctionExpression: checkFunction
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
};
|