WALRIsBot

Inspiration

We wanted a more communal and social way to share and test code solutions among friends. We felt sites such as leetcode don’t have the intimate experience of comparing solutions with a friend.

What it does

It takes your code and a specified language as input, runs it in Google Cloud, and sends back any output and error messages. It also measures the time the program takes to run.

How we built it

Splitting up into teams, one team built the initial Discord bot and the other implemented a way to run the code and return output. Then we incrementally and iteratively added our desired features.

Challenges we ran into

We initially wanted to run the backend on AWS, but its read-only capabilities prevented us from being able to run code there. We also ran into some issues with Google App Engine because we needed local file access and it did not have that. We switched over to Google Compute Engine and everything is working great now!

Accomplishments that we're proud of

We’re proud that we support using multiple languages, reporting errors, and deploying on Google Cloud. On Google App Engine we ran into issues with not being able to handle recursion but now that we are using Google Compute Engine recursion is no problem for us!

We are also happy with how many edge cases we covered like infinite loops, larger outputs, and empty string outputs.

What we learned

We learned more about how to develop software as a team, and also how to manage a larger project, in terms of modular design and task delegation. Through working with both AWS and Google Cloud, we also gained valuable experience in cloud computing.

What's next for WALRIsBot

MORE LANGUAGES, slack integration, displaying code challenges, with user submissions We would like to add support for more languages as well as create a similar bot for Slack and keep track of space efficiency. Additionally, in the future, we may want to store problems created by users into a central hub which is open to the public.

Come check it out on our discord channel https://discord.gg/AA2ppGD

Built With

Submitted to

Hack'20

Created by

I initially worked with AWS integration, but upon realizing its limitations, we switched over to Google Cloud. From there, I worked on the cloud end, as well as on the Java implementation and stress testing.

William Siauw
I worked the bot in Python by supporting the bot creation and output formatting. Furthermore, I heavily tested the bot, discovering any issues along the way.

Private user
I worked to initially develop and test a Discord bot, which we later turned into the WALRIsBot. I also helped with the deployment of our bot onto Google Cloud. I also stress-tested the bot, checking for edge cases and creating fixes as needed.

Atharva Deodhar
I initially worked on trying to get AWS Lambda working so we could run our code in AWS but we ran into some blocks so we switched to running everything off of Google Compute Engine, which was way easier to setup and run.

At this point I helped Imran setup the VM in the google portal, and then I setup the linux environment our bot runs in.

This involved installing packages, dependencies as well as setting up other connections.

I also designed the Python code that runs the code you give our bot and set up ways to time it and catch errors.

I also helped Rachel format our output correctly.

I also formed and and led the team. I helped with making decisions, directing workflow, and general logistic operations.

Luke Kelly
I worked on getting the bot to send and receive messages as well as run the code.

Imran Majeed