gistfile1.js

var CameraShare = function (cameraId, username, target) {
    
    this.cameraId = cameraId;
    this.fromName = username;
    this.target = target;

    this.branchUrl = function(cb) {
        
        branchUrl = "http://www.google.com/"
        cb(branchUrl);
    };
}

CameraShare.prototype.toString = function(cb) {
    
    var self = this;
    this.branchUrl(function(url) {
        
        cb("Hello target, " + self.fromName + "wants to share" + self.cameraId + " with you using this link: "+url);
    });
};

exports.shareCameraIdFromUsernameToTargets = function(cameraId, username, targets) {
    
    console.log("targets", targets);
    for (var i = 0; i < targets.length; i++) {
        var cameraShare = new CameraShare(cameraId, username, targets[i])
        console.log(cameraShare.toString());
    }
};