"use strict";
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/**
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* @license
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* Copyright 2017 Palantir Technologies, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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var tslib_1 = require("tslib");
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var tsutils_1 = require("tsutils");
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var ts = require("typescript");
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var Lint = require("../index");
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var utils_1 = require("../utils");
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var Rule = /** @class */ (function (_super) {
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tslib_1.__extends(Rule, _super);
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function Rule() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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Rule.prototype.apply = function (sourceFile) {
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return this.applyWithWalker(new NewlineBeforeReturnWalker(sourceFile, this.ruleName, undefined));
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};
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/* tslint:disable:object-literal-sort-keys */
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Rule.metadata = {
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ruleName: "newline-before-return",
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description: "Enforces blank line before return when not the only line in the block.",
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rationale: "Helps maintain a readable style in your codebase.",
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hasFix: true,
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optionsDescription: "Not configurable.",
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options: {},
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optionExamples: [true],
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type: "formatting",
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typescriptOnly: false,
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};
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/* tslint:enable:object-literal-sort-keys */
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Rule.FAILURE_STRING = "Missing blank line before return";
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return Rule;
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}(Lint.Rules.AbstractRule));
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exports.Rule = Rule;
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var NewlineBeforeReturnWalker = /** @class */ (function (_super) {
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tslib_1.__extends(NewlineBeforeReturnWalker, _super);
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function NewlineBeforeReturnWalker() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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NewlineBeforeReturnWalker.prototype.walk = function (sourceFile) {
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var _this = this;
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var cb = function (node) {
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if (node.kind === ts.SyntaxKind.ReturnStatement) {
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_this.visitReturnStatement(node);
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}
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return ts.forEachChild(node, cb);
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};
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return ts.forEachChild(sourceFile, cb);
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};
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NewlineBeforeReturnWalker.prototype.visitReturnStatement = function (node) {
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var prev = tsutils_1.getPreviousStatement(node);
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if (prev === undefined) {
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// return is not within a block (e.g. the only child of an IfStatement) or the first statement of the block
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// no need to check for preceding newline
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return;
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}
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var start = node.getStart(this.sourceFile);
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var line = ts.getLineAndCharacterOfPosition(this.sourceFile, start).line;
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var comments = ts.getLeadingCommentRanges(this.sourceFile.text, node.pos);
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if (comments !== undefined) {
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// check for blank lines between comments
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for (var i = comments.length - 1; i >= 0; --i) {
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var endLine = ts.getLineAndCharacterOfPosition(this.sourceFile, comments[i].end)
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.line;
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if (endLine < line - 1) {
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return;
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}
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start = comments[i].pos;
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line = ts.getLineAndCharacterOfPosition(this.sourceFile, start).line;
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}
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}
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var prevLine = ts.getLineAndCharacterOfPosition(this.sourceFile, prev.end).line;
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if (prevLine >= line - 1) {
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var fixer = Lint.Replacement.replaceFromTo(line === prevLine ? node.pos : node.pos + 1, start, line === prevLine
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? utils_1.newLineWithIndentation(prev, this.sourceFile, 2)
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: utils_1.newLineWithIndentation(prev, this.sourceFile));
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// Previous statement is on the same or previous line
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this.addFailure(start, start, Rule.FAILURE_STRING, fixer);
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}
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};
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return NewlineBeforeReturnWalker;
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}(Lint.AbstractWalker));
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