mmorales.photo/back/DataModels/RankingModel.cs

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace back.DataModels;

[Table("Rankings")]
public class RankingModel
{
    [Key]
    public string Id { get; set; } = Guid.NewGuid().ToString();

    private int totalVotes;
    private int upVotes;
    private int downVotes;

    public RankingModel(int totalVotes, int upVotes = 0, int downVotes = 0)
    {
        this.totalVotes = totalVotes;
        this.upVotes = upVotes;
        this.downVotes = downVotes;
    }

    public RankingModel()
    {
        totalVotes = 0;
        upVotes = 0;
        downVotes = 0;
    }

    public void DownVote()
    {
        downVotes++;
        totalVotes++;
    }

    public void UpVote()
    {
        upVotes++;
        totalVotes++;
    }

    public double Score
    {
        get
        {
            if (totalVotes == 0) return 0;
            return (double)(upVotes - downVotes) / totalVotes;
        }
    }
}