"use strict";
/**
 * @license
 * Copyright 2018 Palantir Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var ts = require("typescript");
var Lint = require("../index");
var Rule = /** @class */ (function (_super) {
    tslib_1.__extends(Rule, _super);
    function Rule() {
        return _super !== null && _super.apply(this, arguments) || this;
    }
    Rule.prototype.applyWithProgram = function (sourceFile, program) {
        return this.applyWithFunction(sourceFile, walk, undefined, program.getTypeChecker());
    };
    /* tslint:disable:object-literal-sort-keys */
    Rule.metadata = {
        ruleName: "no-for-in-array",
        description: "Disallows iterating over an array with a for-in loop.",
        descriptionDetails: Lint.Utils.dedent(templateObject_1 || (templateObject_1 = tslib_1.__makeTemplateObject(["\n            A for-in loop (`for (var k in o)`) iterates over the properties of an Object.\n\n            While it is legal to use for-in loops with array types, it is not common.\n            for-in will iterate over the indices of the array as strings, omitting any \"holes\" in\n            the array.\n\n            More common is to use for-of, which iterates over the values of an array.\n            If you want to iterate over the indices, alternatives include:\n\n            array.forEach((value, index) => { ... });\n            for (const [index, value] of array.entries()) { ... }\n            for (let i = 0; i < array.length; i++) { ... }\n            "], ["\n            A for-in loop (\\`for (var k in o)\\`) iterates over the properties of an Object.\n\n            While it is legal to use for-in loops with array types, it is not common.\n            for-in will iterate over the indices of the array as strings, omitting any \"holes\" in\n            the array.\n\n            More common is to use for-of, which iterates over the values of an array.\n            If you want to iterate over the indices, alternatives include:\n\n            array.forEach((value, index) => { ... });\n            for (const [index, value] of array.entries()) { ... }\n            for (let i = 0; i < array.length; i++) { ... }\n            "]))),
        optionsDescription: "Not configurable.",
        options: null,
        optionExamples: [true],
        requiresTypeInfo: true,
        type: "functionality",
        typescriptOnly: false,
    };
    /* tslint:enable:object-literal-sort-keys */
    Rule.FAILURE_STRING = "for-in loops over arrays are forbidden. Use for-of or array.forEach instead.";
    return Rule;
}(Lint.Rules.TypedRule));
exports.Rule = Rule;
function walk(ctx, checker) {
    return ts.forEachChild(ctx.sourceFile, function cb(node) {
        if (node.kind === ts.SyntaxKind.ForInStatement) {
            var type = checker.getTypeAtLocation(node.expression);
            if ((type.symbol !== undefined && type.symbol.name === "Array") ||
                // tslint:disable-next-line:no-bitwise
                (type.flags & ts.TypeFlags.StringLike) !== 0) {
                ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
            }
        }
        return ts.forEachChild(node, cb);
    });
}
var templateObject_1;