Bot - Libraries #2 email validation as an external library

gistfile1.txt

https://github.com/Microsoft/BotBuilder-Samples/tree/master/Node/demo-ContosoFlowers

This is how you could package an email validation:

var EmailRegex = new RegExp(/[a-z0-9!#$%&'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+\/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/);

var lib = new builder.Library('validators');

lib.dialog('email',
    new builder.IntentDialog()
        .onBegin(function (session, args) {
            session.dialogData.retryPrompt = args.retryPrompt;
            session.send(args.prompt);
        }).matches(EmailRegex, function (session) {
            session.endDialogWithResult({ response: session.message.text });
        }).onDefault(function (session) {
            session.send(session.dialogData.retryPrompt);
        }));

// Export createLibrary() function
module.exports.createLibrary = function () {
    return lib.clone();
};
And this is how you can call the validator from your existing code:

// Waterfall Dialog
[
    function (session) {
        session.beginDialog('validators:email', {
            prompt: 'What\'s your email?',
            retryPrompt: 'Something is wrong with that email address. Please try again.'
        });
    },
    function (session, args, next) {
        var email  = args.response;
        // TODO: Save email address
        // ...
    }
]