BetterLyrics/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Entities/LyricsCacheItem.cs

using BetterLyrics.WinUI3.Enums;
using CommunityToolkit.Mvvm.ComponentModel;
using Microsoft.EntityFrameworkCore;
using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Text.Json.Serialization;

namespace BetterLyrics.WinUI3.Models
{
    [Table("LyricsCache")]
    // 建立联合索引，确保同一个 Provider 下，同一个 Hash 只有一条记录
    [Index(nameof(CacheKey), nameof(Provider), IsUnique = false)]
    public partial class LyricsCacheItem : ObservableObject, ICloneable
    {
        [Key][DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; }

        [MaxLength(64)][Required] public string CacheKey { get; set; }

        public LyricsSearchProvider Provider { get; set; }
        [ObservableProperty] public partial TranslationSearchProvider? TranslationProvider { get; set; }
        [ObservableProperty] public partial TransliterationSearchProvider? TransliterationProvider { get; set; }

        public string? Raw { get; set; }

        /// <summary>
        /// 翻译也可能位于 <see cref="Raw"/>
        /// </summary>
        public string? Translation { get; set; }

        /// <summary>
        /// 音译也可能位于 <see cref="Raw"/>
        /// </summary>
        public string? Transliteration { get; set; }

        [MaxLength(255)]
        public string? Title { get; set; }
        [MaxLength(255)]
        public string? Artist { get; set; }
        [MaxLength(255)]
        public string? Album { get; set; }
        public double? Duration { get; set; }
        [ObservableProperty] public partial int MatchPercentage { get; set; } = -1;
        [ObservableProperty] public partial string Reference { get; set; } = "about:blank";

        [NotMapped][JsonIgnore] public bool IsFound => !string.IsNullOrEmpty(Raw);

        [NotMapped][JsonIgnore] public LyricsSearchProvider? ProviderIfFound => IsFound ? Provider : null;

        public object Clone()
        {
            return new LyricsCacheItem()
            {
                Provider = this.Provider,
                TranslationProvider = this.TranslationProvider,
                TransliterationProvider = this.TransliterationProvider,

                Raw = this.Raw,
                Translation = this.Translation,
                Transliteration = this.Transliteration,

                Title = this.Title,
                Artist = this.Artist,
                Album = this.Album,
                Duration = this.Duration,

                MatchPercentage = this.MatchPercentage,
                Reference = this.Reference
            };
        }

        public void CopyFromSongInfo(SongInfo songInfo)
        {
            Title = songInfo.Title;
            Artist = songInfo.Artist;
            Album = songInfo.Album;
        }
    }
}