95 lines
2.8 KiB
C#
95 lines
2.8 KiB
C#
using System;
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using System.ComponentModel.DataAnnotations;
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using System.ComponentModel.DataAnnotations.Schema;
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using Jellyfin.Data.Interfaces;
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namespace Jellyfin.Data.Entities.Libraries
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{
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/// <summary>
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/// An entity representing a collection item.
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/// </summary>
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public class CollectionItem : IHasConcurrencyToken
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="CollectionItem"/> class.
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/// </summary>
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/// <param name="collection">The collection.</param>
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/// <param name="previous">The previous item.</param>
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/// <param name="next">The next item.</param>
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public CollectionItem(Collection collection, CollectionItem previous, CollectionItem next)
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{
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if (collection == null)
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{
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throw new ArgumentNullException(nameof(collection));
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}
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collection.Items.Add(this);
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if (next != null)
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{
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Next = next;
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next.Previous = this;
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}
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if (previous != null)
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{
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Previous = previous;
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previous.Next = this;
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}
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="CollectionItem"/> class.
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/// </summary>
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/// <remarks>
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/// Default constructor. Protected due to required properties, but present because EF needs it.
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/// </remarks>
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protected CollectionItem()
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{
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}
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/// <summary>
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/// Gets or sets the id.
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/// </summary>
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/// <remarks>
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/// Identity, Indexed, Required.
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/// </remarks>
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[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
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public int Id { get; set; }
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/// <inheritdoc />
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[ConcurrencyCheck]
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public uint RowVersion { get; set; }
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/// <summary>
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/// Gets or sets the library item.
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/// </summary>
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/// <remarks>
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/// Required.
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/// </remarks>
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public virtual LibraryItem LibraryItem { get; set; }
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/// <summary>
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/// Gets or sets the next item in the collection.
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/// </summary>
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/// <remarks>
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/// TODO check if this properly updated Dependant and has the proper principal relationship.
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/// </remarks>
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public virtual CollectionItem Next { get; set; }
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/// <summary>
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/// Gets or sets the previous item in the collection.
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/// </summary>
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/// <remarks>
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/// TODO check if this properly updated Dependant and has the proper principal relationship.
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/// </remarks>
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public virtual CollectionItem Previous { get; set; }
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/// <inheritdoc />
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public void OnSavingChanges()
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{
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RowVersion++;
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}
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}
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}
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