@cycxllin/cmpt315-a2/participants.js

Fulfills CMPT 315 Assignment 2, MacEwan University Winter 2024.

/*
Takes array of matches and returns an array of all the player names
Parameters: array of matches where each match is a dictionary containing the
    following key: values
        winner: string
        loser: string
        loser-points: number
Returns: array consisting of all player names
 */

function participants(matches){
    if (Array.isArray(matches)){
        let players = [];

        matches.forEach(match => {
            let winner = match.winner;
            let loser = match.loser;

            if (winner != undefined && !players.includes(winner)){
                players.push(winner)
            }
            if (loser != undefined && !players.includes(loser)){
                players.push(loser)
            }
        });

        return players;
    } else {
        console.error("Error: Parameter passed is not an array");
        return -1;
    }
}

module.exports = participants;