96 lines
2.6 KiB
C#
96 lines
2.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using AudibleApi.Common;
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using AudibleUtilities;
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using DataLayer;
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namespace DtoImporterService
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{
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public class CategoryImporter : ItemsImporterBase
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{
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public CategoryImporter(LibationContext context) : base(context) { }
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public override IEnumerable<Exception> Validate(IEnumerable<ImportItem> importItems) => new CategoryValidator().Validate(importItems.Select(i => i.DtoItem));
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protected override int DoImport(IEnumerable<ImportItem> importItems)
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{
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// get distinct
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var categoryIds = importItems
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.Select(i => i.DtoItem)
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.GetCategoriesDistinct()
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.Select(c => c.CategoryId).ToList();
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// load db existing => .Local
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loadLocal_categories(categoryIds);
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// upsert
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var categoryPairs = importItems
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.Select(i => i.DtoItem)
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.GetCategoryPairsDistinct()
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.ToList();
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var qtyNew = upsertCategories(categoryPairs);
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return qtyNew;
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}
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private void loadLocal_categories(List<string> categoryIds)
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{
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var localIds = DbContext.Categories.Local.Select(c => c.AudibleCategoryId).ToList();
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var remainingCategoryIds = categoryIds
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.Distinct()
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.Except(localIds)
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.ToList();
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// load existing => local
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// remember to include default/empty/missing
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var emptyName = Contributor.GetEmpty().Name;
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if (remainingCategoryIds.Any())
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DbContext.Categories.Where(c => remainingCategoryIds.Contains(c.AudibleCategoryId) || c.Name == emptyName).ToList();
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}
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// only use after loading contributors => local
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private int upsertCategories(List<Ladder[]> categoryPairs)
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{
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var qtyNew = 0;
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foreach (var pair in categoryPairs)
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{
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for (var i = 0; i < pair.Length; i++)
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{
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// CATEGORY HACK: not yet supported: depth beyond 0 and 1
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if (i > 1)
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break;
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var id = pair[i].CategoryId;
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var name = pair[i].CategoryName;
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Category parentCategory = null;
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if (i == 1)
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// should be "Single()" but user is getting a strange error
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parentCategory = DbContext.Categories.Local.FirstOrDefault(c => c.AudibleCategoryId == pair[0].CategoryId);
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// should be "SingleOrDefault()" but user is getting a strange error
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var category = DbContext.Categories.Local.FirstOrDefault(c => c.AudibleCategoryId == id);
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if (category is null)
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{
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try
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{
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category = DbContext.Categories.Add(new Category(new AudibleCategoryId(id), name)).Entity;
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}
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catch (Exception ex)
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{
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Serilog.Log.Logger.Error(ex, "Error adding category. {@DebugInfo}", new { id, name });
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throw;
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}
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qtyNew++;
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}
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category.UpdateParentCategory(parentCategory);
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}
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}
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return qtyNew;
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}
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}
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}
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