Maybe that's good so people can't just create multiple account with fake emails

Although links are being filtered according to the user input, the links are all over the place instead of going up to the list. That means, links are only getting hidden at the list, and not really "deleted"

Some of the API requests are running very slow: sometimes it takes up to 10 seconds to retrieve data from Codeforces.
We need to take a look at this and see if we can speed up things.

The top menu bar is not being shown at some places, for example at the Compare page (/result)

On /profile page

Treat errors such as 404 and API Calls failures

Client gets rails error when registering a new user with existing username

When comparing 2 users, there is an error if there is some space at the beginning or the end of the handle.

It happens both on /result and /profile pages

When the handle is too large, it doesn't fit the container in the result page.

Create links at the /profile page to easly load the /result page showing the comparison between the current user and their friends

Double check with user if they really want to delete the link before actually doing it

When results screen starts big and is resized, graph disappears.

• Same thing goes for adding items. Maybe it's good to create an option to add items when the user settles the handle. This should be discussed.
• Implement a way to add many items (separated by commas) at the same time.

Typing Codeforces handles mixing uppercase and lowercase that differ from the original handle lead to possible bugs:
-> The handle shown at the profile page isn't the original. Needs to be.
-> Trying to remove the handle as it is originally isn't possible. Should be (as it should mixing uppercase/lowercase)

Also, when adding problems, the current form only accepts the letter index as uppercase. It should also accept lowercase letters. For example, 939A is accepted but 393a isn't.

Add a tooltip to compare/delete icon beside each friend.

Everything the user inserts doesn't receive links at the moment. Gotta do that.

When there is no internet connection and you compare 2 handles, it goes "Please provide 2 valid Codeforces handles!".

Remove buttons, add instructions

Make graph bigger. There is enough space not being used.

On the /result page, whenever an user hits the update info button there should pop up a box containing a simple loading screen. The way it is right now doesn't let the user know whether something is happening or not.

Removing them by writing their name is doable, but a bit unpleasant. Maybe a delete button next to each item would be nice.

There's a white strip on the right of the results page.

There is a white empty gap between logo and results at /result page...

Rating difference should appear around the rating graph on top

Devise views seem to be bad... error messages are not well formated, for example

At the /profile page, the application must talk to the Codeforces API when the user adds a problem/contest to notice (or not) if the problem/contest being added has already been solved. Make sure if the user still wants to add it in case it's been solved.

The same thing should be done when loading the page and there are links in the database already.

If one tries to add a Gym contest to "contests" on /profile page it will work. However the CF link to that contest isn't working.

Also, if you try to add a Gym problem to "problems" on /profile page it will say the problem doesn't exist.

The idea is to make daily API calls for the last 100 users who had their names searched on the website and store the responses on our database.

Also, there should be an "Update now" button on both /result and /profile page in case the user wants their handle informations to be updated instantly. If this button is pressed we make the API calls anyway and warn the user this may take a while (the upper bound seems to be around 15-20 seconds)

That way we can reduce the loading time of /result and /profile pages.

Add "Log in with Google/Facebook"

Graph does not resize on screen resize.

Labels are not shown on small and medium graphs

At the /profile page, force the user to insert their CF handle, otherwise things won't work

Vertically center the 2 search bars and change the bars to bootstrap style

"Problems by tag" chart shouldn't display so many different tags. Maybe 5 tags or so and then add another label for "Other"

Improve "Please provide 2 valid Codeforces handles!" warning. Right now, it's an entire page (with only plain text) just for a warning.

Unrated codeforces rounds are being counted as normal rated rounds. That means if an user who is supposed to be unrated participated only in unrated rounds, the application gives him rated colors, max up/down rating values, etc.

Ran into error when comparing some competitors, such as scott_wu and tourist.

The design is a bit messed up...

• Every row shouldn't be scrollable and their size must be proportional (NOT FIXED!!!!) to the viewer screen size (maybe use vh/vw on CSS to do that?).
• The last row ("Results") has to center elements.
• Instead of buttons to show/hide content, make a scrowable list for everything that has a lot of links to be shown. Also, make a search bar to easly filter problems/contests by their names/numbers.

Modify all buttons at /result pages. Instead, make scrollable lists of problems/contests with a search box above them to easly filter problems/contests.

On /result page, fix this javascript error (can be seen opening the console): Uncaught Error: Google Charts loader.js can only be loaded once.

This might be helpful: https://stackoverflow.com/questions/18840178/redraw-google-chart-after-every-ajax-call

Show an error on failed login.

On /result page, when you zoom in and then zoom out, the first user row doesn't get resized properly

While the second user is fine