loop-events

Loop EventEmit

multiple asynchronous event for eventemit

Installation

 npm install loop-events

Usage

multiple asynchronous event complete :

var LoopEvent = require("loop-events"),
    https = require("https");

var urlEvent = new LoopEvent();
var urls = ["https://github.com/", "https://github.com/", "https://github.com/"];

urlEvent.setChildCount(urls.length);
urlEvent.on("allDone", function () {
    console.log("allDone");
});
urls.forEach(function (url) {
    https.request(url, function () {
        urlEvent.emit("childDone");
    }).end();
});

more complex (recursion folder complete event):

var LoopEvent = require("loop-events"),
    fs = require("fs"),
    path = require("path");

var root = path.resolve(__dirname, "..");
var event = new LoopEvent();
function loopdir(folder, parent) {
    fs.readdir(folder, function (err, files) {
        if (files.length == 0) {
            parent.emit("childAllDone")
            return;
        }
        parent.setChildCount(files.length);
        files.forEach(function (file) {
            var curLoopEvents = new LoopEvent(parent);
            var absPath = path.join(folder, file);
            fs.stat(absPath, function (err, stas) {
                if (stas.isDirectory()) {
                    loopdir(absPath, curLoopEvents);
                } else {
                    curLoopEvents.emit("childAllDone", absPath);
                }
            })
        })
    })
}

event.on("allDone", function () {
    console.log("allDone");
});
loopdir(root, event);