Elo Now

This is a simple implementation of the Elo rating system in Go. One api endpoint is exposed to calculate the new ratings of two players after a match.

Usage

To run the server, execute the following command:

go run ./cmd/main.go 

The server will be running on port 8080.

To calculate the new ratings of two players after a match, make a GET request to the /elo/rating endpoint.

GET /elo/rating?rating1=1200&rating2=1200&outcome=1

The query parameters are as follows:

• rating1: The rating of player 1
• rating2: The rating of player 2
• outcome: The outcome of the match. 1 if player 1 won, 0 if player 2 won, 0.5 if it was a draw.

The response will be a JSON object with the new ratings of the two players.

{
    "data": [
        {
            "prevRating": 1200,
            "diff": 16,
            "newRating": 1216
        },
        {
            "prevRating": 1200,
            "diff": -16,
            "newRating": 1184
        }
    ]
}