no-extraneous-class.js
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"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const experimental_utils_1 = require("@typescript-eslint/experimental-utils");
const util = __importStar(require("../util"));
exports.default = util.createRule({
name: 'no-extraneous-class',
meta: {
type: 'suggestion',
docs: {
description: 'Forbids the use of classes as namespaces',
category: 'Best Practices',
recommended: false,
},
schema: [
{
type: 'object',
additionalProperties: false,
properties: {
allowConstructorOnly: {
type: 'boolean',
},
allowEmpty: {
type: 'boolean',
},
allowStaticOnly: {
type: 'boolean',
},
allowWithDecorator: {
type: 'boolean',
},
},
},
],
messages: {
empty: 'Unexpected empty class.',
onlyStatic: 'Unexpected class with only static properties.',
onlyConstructor: 'Unexpected class with only a constructor.',
},
},
defaultOptions: [
{
allowConstructorOnly: false,
allowEmpty: false,
allowStaticOnly: false,
allowWithDecorator: false,
},
],
create(context, [{ allowConstructorOnly, allowEmpty, allowStaticOnly, allowWithDecorator }]) {
const isAllowWithDecorator = (node) => {
return !!(allowWithDecorator &&
node &&
node.decorators &&
node.decorators.length);
};
return {
ClassBody(node) {
const parent = node.parent;
if (!parent || parent.superClass) {
return;
}
const reportNode = 'id' in parent && parent.id ? parent.id : parent;
if (node.body.length === 0) {
if (allowEmpty || isAllowWithDecorator(parent)) {
return;
}
context.report({
node: reportNode,
messageId: 'empty',
});
return;
}
let onlyStatic = true;
let onlyConstructor = true;
for (const prop of node.body) {
if ('kind' in prop && prop.kind === 'constructor') {
if (prop.value.params.some(param => param.type === experimental_utils_1.AST_NODE_TYPES.TSParameterProperty)) {
onlyConstructor = false;
onlyStatic = false;
}
}
else {
onlyConstructor = false;
if ('static' in prop && !prop.static) {
onlyStatic = false;
}
}
if (!(onlyStatic || onlyConstructor)) {
break;
}
}
if (onlyConstructor) {
if (!allowConstructorOnly) {
context.report({
node: reportNode,
messageId: 'onlyConstructor',
});
}
return;
}
if (onlyStatic && !allowStaticOnly) {
context.report({
node: reportNode,
messageId: 'onlyStatic',
});
}
},
};
},
});
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