tiku-backend.net/Tiku.Domain/Learning/LearningEntities.cs

using System.Text.Json;
using Tiku.Domain.Common;

namespace Tiku.Domain.Learning;

public sealed class PracticeSession : TenantEntity
{
    public Guid UserId { get; set; }
    public Guid? BlueprintId { get; set; }
    public Guid? CollectionId { get; set; }
    public Guid? EntryId { get; set; }
    public Guid? ContentNodeId { get; set; }
    public string Mode { get; set; } = "chapter";
    public string? TargetType { get; set; }
    public Guid? TargetId { get; set; }
    public DateTimeOffset StartedAt { get; set; } = DateTimeOffset.UtcNow;
    public DateTimeOffset? FinishedAt { get; set; }
    public JsonElement QuestionIds { get; set; } = JsonDefaults.Array();
    public int QuestionCount { get; set; }
    public int? DurationMinutes { get; set; }
    public decimal? TotalScore { get; set; }
    public DateTimeOffset? ExpiresAt { get; set; }
    public JsonElement Metadata { get; set; } = JsonDefaults.Object();
}

public sealed class AnswerRecord : TenantEntity
{
    public Guid UserId { get; set; }
    public Guid? QuestionId { get; set; }
    public Guid? QuestionVersionId { get; set; }
    public Guid? PracticeSessionId { get; set; }
    public string? LegacyId { get; set; }
    public string? LegacyQuestionId { get; set; }
    public string? LegacyCategoryId { get; set; }
    public JsonElement SelectedOptions { get; set; } = JsonDefaults.Array();
    public string? AnswerText { get; set; }
    public bool? IsCorrect { get; set; }
    public DateTimeOffset AnsweredAt { get; set; } = DateTimeOffset.UtcNow;
    public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;
}

public sealed class FavoriteQuestion
{
    public Guid TenantId { get; set; }
    public Guid UserId { get; set; }
    public Guid QuestionId { get; set; }
    public string Source { get; set; } = "imported";
    public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;
}

public sealed class WrongQuestion
{
    public Guid TenantId { get; set; }
    public Guid UserId { get; set; }
    public Guid QuestionId { get; set; }
    public int WrongCount { get; set; } = 1;
    public DateTimeOffset LastWrongAt { get; set; } = DateTimeOffset.UtcNow;
    public DateTimeOffset? ResolvedAt { get; set; }
}

public sealed class RecentPractice : AuditableTenantEntity
{
    public Guid? UserId { get; set; }
    public string? LegacyId { get; set; }
    public string? PracticeType { get; set; }
    public string? TargetLegacyId { get; set; }
    public string? TargetName { get; set; }
    public int Progress { get; set; }
    public string? Color { get; set; }
    public DateTimeOffset? LastAccessAt { get; set; }
    public DateTimeOffset? LastPracticeAt { get; set; }
    public JsonElement Metadata { get; set; } = JsonDefaults.Object();
}