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Hoppy; Next Generation Bartending

, 4 Sep 2013 CPOL
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Modernising Bar Point-of-Sale & Online Presence

Please note

This article is an entry in our AppInnovation Contest. Articles in this sub-section are not required to be full articles so care should be taken when voting.


Over the last couple of years, I’ve become engrossed in the craft beer scene that’s becoming popular across the globe. Particularly in North America, the UK and Northern Europe.  The scene is booming with exciting new bars and flavour-forward beers.

After having visited a plethora of these bars and given the fact I can’t help but think about the technology, I’ve realised that there are a number of things that could be done better.  After meeting my partner, who actually works in one of these bars, I’ve become certain of this fact.

The two things that are most lacking, in my opinion, are the lack of an easy to use, feature rich point-of-sale application for bartenders and the lack of a real-time feed between the bar and its customers.  Beer nerds love to be able to survey a bar before heading there, to discover whether there is anything rare or interesting on offer. 

Hoppy seeks to remedy the above by providing a point-of-sale application for Windows 8 tablets (to be used on the floor), a web service to receive and track sales information and tap changes and a website to display what’s currently on tap.


I’ve been working as a Software Developer for the last five years, recently becoming a Technical Lead with my employer, focusing on designing and building elegant, networked geospatial applications.  In this time, I’ve learned a great deal about WPF, the .NET framework, ASP.NET and web services.  This has given me the skillset required to tackle large, multi-faceted solutions.

I’ve been heavily involved in the craft beer movement for the last couple of years and have participated in technical support with an Edinburgh craft beer bar, sorely becoming aware of the poor quality of the available point of sale software designed for bars.  I also spent about five years working in retail, so I’m familiar with standard point of sale solutions.

Components and Technologies Overview 

As briefly mentioned in the introduction, the application will be split into three main components.


  • Point of sale application which runs on Windows 8 tablets.
  • Includes an administration mode which allows for cellar personnel to enter stock, perform reporting and swap taps.
  • Would like to support authentication via thumbprint reader, though this will mostly depend on whether there's an free/open-source API available. 
  • Technologies: C#, .NET 4.5, Reactive Extensions, WPF, MVVM, JSON & SQLite. 

Hoppy Server 

  • Point of sale server. Runs in Azure and will be provided as a hosted solution for end users.  This will also be released as a standalone web service.
  • Technologies: C#, .NET 4.5, Azure, MVC 4, Web API, IIS 7.5, JSON, Entity Framework & SQLServer 2012.  

Hoppy Taps 

  • Taps website. An ASP.NET MVC4 website which will display taps for a given bar.  Runs in Azure and will be provided as a hosted solution for end users. This will also be released as a standalone website.
  • Technologies: C#, .NET 4.5, Azure, MVC 4, IIS 7.5, JSON, HTML5/CSS3/JS, Bootstrap, Knockout, and jQuery.

User Interface  

Click any of the images to view a larger size. 

Main Taps Display

Sign In


Password / Thumbprint Authentication 


Wine List


Soda List


Spirits List 


Sample Instance of Hoppy Taps  



As described in the introduction, the application will be split into three main components. Hoppy (which runs on the tablet), Hoppy Server (which runs as a web service and is hosted in the cloud) and Hoppy Taps (a website hosted in the cloud).  A visual representation of these components and their sub-components is shown below.



This application is being built using a standard Model-View-View Model (MVVM) approach.  Model classes have been created to represent transactions, stock items, tap updates and accounts.  I’m using a REST client to pull these from Hoppy Server, which will push updates via Reactive Extensions (Rx) onto the ViewModel, and in turn, update the View, which in this case is a WPF Page.  Any changes or transactions made on the tablet will be pushed via the REST client to Hoppy Server and stored locally in the SQLite cache. 

Hoppy Server

Hoppy Server is an MVC 4 / Web API application which handles received transactions, stock changes, tap changes and balance updates for accounts, essentially providing synchronisation support for a multiple tablet environment.  Model data will be stored via Entity Framework in a local SQLServer 2012 instance.  There will also be a public API available where current taps can be queried; this will be used by Hoppy Taps. 

Database Schema

The current working database schema is shown below, the majority of tables have a one-to-one mapping to a Web API controller, which has been populated with CRUD methods. 


Click the schema above to see a larger size. 

Hoppy Taps   

Hoppy Taps is an MVC 4 website which queries Hoppy Server using JQuery AJAX, stores the results in a View Model and binds these to the page using Knockout.  This is a fairly simple application with one only page and is designed to be integrated into a bar’s existing website.

Status and Further Work 


At time of writing, each component has been mocked up using sample data view models and is currently being fleshed out with code.  I expect that in a couple of weeks, most parts of the application will be functioning, with the remainder of the functionality and polish being added a few weeks later.
Code snippets & design diagrams will continue to be posted as the project grows.  


  • Hoppy - 10% 
  • Current work is on designing each page and its respective ViewModel.
  • Next: Integration with Hoppy Server.  

  • Hoppy Server - 50% 
  • Current work is on fleshing out scaffolded Web API controllers.
  • Next: Investigate any synchronisation issues. 

  • Hoppy Taps - 75% 
  • Currently working on polishing the user interface and adding additional UI elements (such as tap name, tap type (cask/keg), quantity remaining and when the beverage went on tap).
  • Next: Packaging up the website for download. 

Further Work & Ideas 

I want this application to be a market-leading bar point-of-sale system. As such, I have some ambitious ideas in the works for after this version of the product is completed. These are as follows. 

  • Automatically posting tap changes to Twitter, i.e. ON: <Beer Name>, OFF: <Beer Name>
  • Publishing a bottle list automatically for those interested in rare bottled beverages.
  • Publishing food items, snacks, and other non-alcoholic products.
  • A customer mode of the software which can be ran on a tablet that faces the customer; this could be used to recommend beverages based on favourites, find out more information about a beer including its rating on beer rating websites (Untappd, Beer Advocate, Rate Beer, etc). 
  • Web-based reporting facilities to display sales history, profits, efficiency/waste, customer spending habits & popular products. 
  • Barcode reader support for easy addition of stock by cellar management staff. 

Contest Details   

  • Platform: Windows 8 Tablet (as a full-screen, touch-aware desktop application; not Metro/Modern UI). 
  • Category: Retail
  • Languages: C#, JavaScript, HTML 5, and CSS3  


  • 4 September 2013 - I've spent some time working through some of the remaining page design. I've updated the article screenshots to reflect the pages as they exist at the moment. I've also decided that I'd like to include support for a thumbprint reader, and I'll be investigating whether this is feasible with the scope of this competition. 
  • 21 August 2013 - Initial version.  


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Joe Brock
Technical Lead Sigma Seven Ltd
United Kingdom United Kingdom
I've been designing and developing software at Sigma Seven Ltd for the last five years, specializing in networked geospatial solutions. I've been lead developer on a number of high-profile enterprise solutions and am currently working on developing new products and improving core components of our existing products. My current role within the organisation is Technical Lead.
I hold an MSc in Software Engineering and have a huge amount of passion for C#, WPF, web services and anything that looks particularly complex and nerdy.
I also love to blog about beer and collect copious quantities of movies and television series, without actually bothering to watch most of them.
I entered the 2012 AppInnovation contest last year and passed the first round, winning an Intel SDE Ultrabook. My application, Transport Tracker, was subsequently published in the Intel AppUp store.

Comments and Discussions

QuestionHow's app development going? Will you be submitting on time? PinstaffKevin Priddle22-Oct-13 9:26 
AnswerRe: How's app development going? Will you be submitting on time? PinstaffKevin Priddle22-Oct-13 9:54 
GeneralMy vote of 5 Pinmemberzvorak26-Aug-13 5:45 
AdminThanks for your submission! PinstaffKevin Priddle22-Aug-13 5:54 
GeneralMy vote of 5 PinprofessionalAbhishek Nandy21-Aug-13 18:34 
GeneralMy vote of 5 [modified] PinmemberMember 1022396621-Aug-13 12:47 

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