56 lines
1.6 KiB
JavaScript
56 lines
1.6 KiB
JavaScript
/**
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* @fileoverview Require providing a second parameter to get*Pref
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* methods instead of using a try/catch block.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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"use strict";
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module.exports = {
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meta: {
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docs: {
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url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/rules/use-default-preference-values.html",
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},
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messages: {
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provideDefaultValue:
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"provide a default value instead of using a try/catch block",
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},
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schema: [],
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type: "suggestion",
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},
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create(context) {
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return {
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TryStatement(node) {
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let types = ["Bool", "Char", "Float", "Int"];
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let methods = types.map(type => "get" + type + "Pref");
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if (
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node.block.type != "BlockStatement" ||
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node.block.body.length != 1
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) {
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return;
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}
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let firstStm = node.block.body[0];
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if (
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firstStm.type != "ExpressionStatement" ||
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firstStm.expression.type != "AssignmentExpression" ||
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firstStm.expression.right.type != "CallExpression" ||
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firstStm.expression.right.callee.type != "MemberExpression" ||
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firstStm.expression.right.callee.property.type != "Identifier" ||
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!methods.includes(firstStm.expression.right.callee.property.name)
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) {
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return;
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}
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context.report({
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node,
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messageId: "provideDefaultValue",
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});
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},
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};
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},
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};
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