"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const path_1 = __importDefault(require("path"));
const chokidar_1 = __importDefault(require("chokidar"));
const parsers_1 = __importDefault(require("../parsers"));
/**
 Watch a folder and resolve promise once a file is modified

 @param {string} dir
 @param callback
 @return {Promise}
 */
function watch(dir, callback) {
    dir = path_1.default.resolve(dir);
    const toWatch = ["book.json", "book.js", "_layouts/**"];
    // Watch all parsable files
    parsers_1.default.extensions.forEach((ext) => {
        toWatch.push(`**/*${ext}`);
    });
    const watcher = chokidar_1.default.watch(toWatch, {
        cwd: dir,
        // prevent infinity loop
        // https://github.com/honkit/honkit/issues/269
        ignored: ["_book/**", "node_modules/**"],
        ignoreInitial: true
    });
    watcher.on("all", (e, filepath) => {
        callback(null, path_1.default.resolve(dir, filepath));
    });
    watcher.on("error", (err) => {
        callback(err);
    });
}
exports.default = watch;