29 lines
1.1 KiB
C#
29 lines
1.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Dinah.Core.Collections.Generic;
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namespace DTOs
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{
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public static class LibraryApiV10Extensions
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{
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public static IEnumerable<Person> GetAuthorsDistinct(this IEnumerable<Item> items)
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=> items.SelectMany(i => i.Authors).DistinctBy(a => new { a.Name, a.Asin });
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public static IEnumerable<Person> GetNarratorsDistinct(this IEnumerable<Item> items)
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=> items.SelectMany(i => i.Narrators).DistinctBy(n => new { n.Name, n.Asin });
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public static IEnumerable<Series> GetSeriesDistinct(this IEnumerable<Item> items)
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=> items.SelectMany(i => i.Series).DistinctBy(s => new { s.SeriesName, s.SeriesId });
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public static IEnumerable<Ladder> GetParentCategoriesDistinct(this IEnumerable<Item> items)
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=> items.Select(l => l.ParentCategory).DistinctBy(l => new { l.CategoryName, l.CategoryId });
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public static IEnumerable<Ladder> GetChildCategoriesDistinct(this IEnumerable<Item> items)
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=> items
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.Select(l => l.ChildCategory)
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.Where(l => l != null)
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.DistinctBy(l => new { l.CategoryName, l.CategoryId });
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}
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}
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