Add API

API/Schema/Chapter.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using System.Xml.Linq;
+using API.Schema.Jobs;
+using Microsoft.EntityFrameworkCore;
+
+namespace API.Schema;
+
+[PrimaryKey("ChapterId")]
+public class Chapter : IComparable<Chapter>
+{
+    [MaxLength(64)]
+    public string ChapterId { get; init; } = TokenGen.CreateToken(typeof(Chapter), 64);
+    public float? VolumeNumber { get; private set; }
+    public float ChapterNumber { get; private set; }
+    public string Url { get; internal set; }
+    public string? Title { get; private set; }
+    public string ArchiveFileName { get; private set; }
+    public bool Downloaded { get; internal set; } = false;
+    
+    [MaxLength(64)]
+    public string ParentMangaId { get; init; }
+    [ForeignKey("ParentMangaId")]
+    public virtual Manga ParentManga { get; init; }
+
+    public Chapter(string parentMangaId, string url, float chapterNumber,
+        float? volumeNumber = null, string? title = null)
+    {
+        this.ParentMangaId = parentMangaId;
+        this.Url = url;
+        this.ChapterNumber = chapterNumber;
+        this.VolumeNumber = volumeNumber;
+        this.Title = title;
+        this.ArchiveFileName = BuildArchiveFileName();
+    }
+
+    public Chapter(Manga parentManga, string url, float chapterNumber,
+        float? volumeNumber = null, string? title = null) : this(parentManga.MangaId, url, chapterNumber, volumeNumber, title)
+    {
+    }
+
+    public MoveFileOrFolderJob? UpdateChapterNumber(float chapterNumber)
+    {
+        this.ChapterNumber = chapterNumber;
+        return UpdateArchiveFileName();
+    }
+
+    public MoveFileOrFolderJob? UpdateVolumeNumber(float? volumeNumber)
+    {
+        this.VolumeNumber = volumeNumber;
+        return UpdateArchiveFileName();
+    }
+
+    public MoveFileOrFolderJob? UpdateTitle(string? title)
+    {
+        this.Title = title;
+        return UpdateArchiveFileName();
+    }
+
+    private string BuildArchiveFileName()
+    {
+        return $"{this.ParentManga.Name} - Vol.{this.VolumeNumber ?? 0} Ch.{this.ChapterNumber}{(this.Title is null ? "" : $" - {this.Title}")}.cbz";
+    }
+
+    private MoveFileOrFolderJob? UpdateArchiveFileName()
+    {
+        string oldPath = GetArchiveFilePath();
+        this.ArchiveFileName = BuildArchiveFileName();
+        if (Downloaded)
+        {
+            return new MoveFileOrFolderJob(oldPath, GetArchiveFilePath());
+        }
+        return null;
+    }
+    
+    /// <summary>
+    /// Creates full file path of chapter-archive
+    /// </summary>
+    /// <returns>Filepath</returns>
+    internal string GetArchiveFilePath()
+    {
+        return Path.Join(TrangaSettings.downloadLocation, ParentManga.FolderName, ArchiveFileName);
+    }
+
+    public bool IsDownloaded()
+    {
+        string path = GetArchiveFilePath();
+        return File.Exists(path);
+    }
+
+    public int CompareTo(Chapter? other)
+    {
+        if(other is not { } otherChapter)
+            throw new ArgumentException($"{other} can not be compared to {this}");
+        return this.VolumeNumber?.CompareTo(otherChapter.VolumeNumber) switch
+        {
+            <0 => -1,
+            >0 => 1,
+            _ => this.ChapterNumber.CompareTo(otherChapter.ChapterNumber)
+        };
+    }
+    
+    internal string GetComicInfoXmlString()
+    {
+        XElement comicInfo = new XElement("ComicInfo",
+            new XElement("Tags", string.Join(',', ParentManga.Tags.Select(tag => tag.Tag))),
+            new XElement("LanguageISO", ParentManga.OriginalLanguage),
+            new XElement("Title", this.Title),
+            new XElement("Writer", string.Join(',', ParentManga.Authors.Select(author => author.AuthorName))),
+            new XElement("Volume", this.VolumeNumber),
+            new XElement("Number", this.ChapterNumber)
+        );
+        return comicInfo.ToString();
+    }
+}