Challenge Overview
Project Overview
TopCoder is implementing a Web-based Arena by using Web Socket protocol, AngularJS Framework (http://angularjs.org, http://docs.angularjs.org/guide) and Bootstrap 3 (http://getbootstrap.com/getting-started).
The frontend application is using AngularJS Framework (http://angularjs.org, http://docs.angularjs.org/guide) and Bootstrap 3 (http://getbootstrap.com/getting-started), and using web socket protocol to exchange data with backend web socket listener.
The backend web socket listener is ready for exchanging messages over web socket protocol.
Competition Task Overview
We are in the process of implementing and improving the web arena, the code can be found at appirio-tech/arena-web, by default it is using dev branch, if it is not, please switch to dev branch for your development.
For this challenge, we'd like to implement the recovery/retry logic from connection losts.
How to simulate connection lost
- Logged into the arena;
- Turned off wi-fi for 30+ seconds;
- Went back into the arena;
- I immediately got a popup with a message: "The connection to the server has been lost. Please log off and log in again." But the message showed for only a few seconds (2 or 3) and disappeared automatically.
What To Improve
First, we'd like to make sure the message doesn't disappear, and the user has to click OK to dismiss it.
Second, the message could provide more information about why the problem happened and what the user should do; let's change the message like "The communication with the competition server has been interrupted! Please verify your network connection, copy your work, and refresh this page."
Finally, instead of logging out and back in, we'd like to do some recovery logic.
1. Once the message is dismissed, we'd like to re-establish the web socket connection, if the web socket connection is re-established, an dialog will be displayed to reconnect, User have to click the Reconnect button to relogin.
2. Since the sso cookie is still valid, we can do relogin, during the login, please show the process using the preloading image with some text, no other action can be done during this action.
2. After successfully login, we'd like to navigate to the current page, so proper requests should be sent after login.
Configuration
Please make the domain related information configurable as others, see dev-local.sh. So we can easily switch for different environments.
Where to setup the Arena Web
You are expected to have your own environment to setup web arena, Linux environment is perferred.
for backend, an Arena VM will be allocated to each competitor, to setup SRM contests datas.
Winner Responsibility
Winner will be responsible to create a pull request in final fix phase for final review, and be responsible to update the pull request to auto merge.
Arena VM
Before asking your own VM, you need to have a public key on your profile before asking for the VM.
You can find more details on how to generate a key http://apps.topcoder.com/wiki/display/projects/Generate+SSH+Key and how to connect using it http://apps.topcoder.com/wiki/display/projects/Connect+Using+SSH+Key.
To use the Arena VM, please follow http://apps.topcoder.com/wiki/display/docs/Competition+Engine+VM+Setup
Specific HTML/CSS/JavaScript Requirements:
HTML/CSS Requirements:
- Your HTML code must be valid HTML5 and follow best practices
- Validate your code - reviewers may accept minor validation errors, but please comment your reason for any validation errors. Use the validators listed in the scorecard.
- Use CSS to space out objects, not clear/transparent images (GIFs or PNGs) and use proper structural CSS to layout your page. Only use table tags for tables of data/information and not for page layout.
- No inline CSS styles - all styles must be placed in an external style-sheet.
- Use semantically correct tags - use H tags for headers, etc. Use strong and em tags instead of bold and italic tags.
- Element and Attribute names should be in lowercase and use a "-" or camel naming to separate multiple-word classes (i.e.. "main-content", or "mainContent)
- Label all CSS, JavaScript, or HTML hacks with explanations so others will understand.
- Your code must render properly in all browsers listed in the scorecard in both Mac and PC environments.
JavaScript Requirements:
- jQuery
- AngularJS
- All custom javascript (written by the competitors) must pass jslint checks
Browsers Requirements:
- IE10
- IE11
- Latest Safari
- Latest Firefox
- Latest Chrome
Final Submission Guidelines
Submission Deliverables
Below is an overview of the deliverables:
- please only include changed files (removed, new and changed) with git commit hash.
- A complete and detailed deployment document explaining how to deploy the application including configuration information.
Final Submission
For each member, the final submission should be uploaded to the Online Review Tool.
PROTOTYPE GOALS:
- We need clean documentation of the code. Please create detailed comments for the different HTML5, CSS3 and JavaScript code.
- Please note, we are expecting the HTML5 prototype to work on mobiles.
- Use CSS3 Media Queries to load different styles for each page and don't build different page for different device/layout.
- Remember, all pages should link where possible. Please help us show correct page flow.
- Please use Bootstrap 3 for css.
- Please use AngularJS framework for data binding.
- Please use angular-ui components:
1- ui-bootstrap
2- ui-router (for app structure as a state machine)
3- ui-ace or ui-codemirror (for the code editor)
4- other ui components as needed (date, calendar)
TECHNOLOGY GUIDELINES:
1. HTML5
- Provide comments on the page elements to give clear explanation of code usage. The goal is to help future developers understand the code.
- Please use clean INDENTATION for all HTML code so future developers can follow the code.
- All HTML code naming should not have any conflicts
- Make sure all HTML files pass Validation without Error/Warning.
2. CSS3
- Provide comments on the CSS code, we need CSS comments to give clear explanation of the code usage. The goal is to help future developers understand the code.
- Please use clean INDENTATION for all CSS so future developers can follow the code.
- All CSS naming should not have any conflicts
- Make sure all CSS files pass validation without Error/Warning.
3. JAVASCRIPT
- Provide comments on the JavaScript code to give clear explanation of the code usage. The goal is to help future developers understand the code and know what needs to be developer further.
- Please use clean INDENTATION for all JavaScript code so future developers can follow the code.
4. ANGULAR JS
- Angular models are plain old JavaScript objects. Use JSON objects for data binding with view.
- Data-binding is an automatic way of updating the view whenever the model changes, as well as updating the model whenever the view changes.
- Controllers are the behavior behind the DOM elements. AngularJS lets you express the behavior in a clean readable form.
- Use AngularJS Framework (http://angularjs.org, http://docs.angularjs.org/guide) to populate JSON data.
5. IMAGES
- For mobile development, images should be properly compressed while still having good visual quality.
- If possible, using background color properties, instead of repetition usage of background based image.
- Use sprites technique for the image slicing. Page reference