Kavita/API/Entities/MangaFile.cs

using System;
using System.IO;
using API.Entities.Enums;
using API.Entities.Interfaces;

namespace API.Entities;

/// <summary>
/// Represents a wrapper to the underlying file. This provides information around file, like number of pages, format, etc.
/// </summary>
public class MangaFile : IEntityDate
{
    public int Id { get; set; }
    /// <summary>
    /// Absolute path to the archive file
    /// </summary>
    public string FilePath { get; set; }
    /// <summary>
    /// Number of pages for the given file
    /// </summary>
    public int Pages { get; set; }
    public MangaFormat Format { get; set; }
    /// <inheritdoc cref="IEntityDate.Created"/>
    public DateTime Created { get; set; }

    /// <summary>
    /// Last time underlying file was modified
    /// </summary>
    /// <remarks>This gets updated anytime the file is scanned</remarks>
    public DateTime LastModified { get; set; }
    /// <summary>
    /// Last time file analysis ran on this file
    /// </summary>
    public DateTime LastFileAnalysis { get; set; }


    // Relationship Mapping
    public Chapter Chapter { get; set; }
    public int ChapterId { get; set; }


    /// <summary>
    /// Updates the Last Modified time of the underlying file to the LastWriteTime
    /// </summary>
    public void UpdateLastModified()
    {
        LastModified = File.GetLastWriteTime(FilePath);
    }
}