Merge pull request 'Redacted Product.Price mapping on filter' (#50) from midrandshop into master

Reviewed-on: #50

LiteCharms.Features.MidrandBooks.Seed/CategorySeederService.cs

@@ -0,0 +1,133 @@
+using LiteCharms.Features.MidrandBooks.Categories;
+using LiteCharms.Features.MidrandBooks.Products;
+
+namespace LiteCharms.Features.MidrandBooks.Seed;
+
+public class CategorySeederService(CategoryService categoryService, ProductService productService, IFeatureManager features,
+    ILogger<CategorySeederService> logger) : BackgroundService
+{
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        if (!await features.IsEnabledAsync("CategorySeederService")) return;
+
+        logger.LogInformation("Category and Product-Tag Mapping Seeding started (15-char limit applied)");
+
+        // Initialize Bogus to ensure repeatable distribution matrix pathing
+        var faker = new Faker();
+        Randomizer.Seed = new Random(101);
+
+        // 1. Curate Broad Book Categories (IsMain = true, Max 20, Max 15 chars)
+        var broadMainCategories = new[]
+        {
+            "Fiction", "Non-Fiction", "Youth & Kids", "Academic",
+            "Biographies", "Business", "Sci-Fi & Fantasy",
+            "Thrillers", "Self-Help", "History",
+            "Spirituality", "Arts & Photo", "Technology",
+            "Cookbooks", "Travel & Maps", "Poetry & Drama", "Graphic Novels"
+        };
+
+        // 2. Curate Niche Subcategories/Tags (IsMain = false, Max 15 chars)
+        var specializedSubCategories = new[]
+        {
+            "Cyberpunk", "Space Opera", "Historical Fix", "Cozy Mystery", "True Crime",
+            "Agile Project", "Software Eng", "AI & ML", "Cloud Comput",
+            "SA History", "African Lit", "Apartheid Era", "Mandela Legacy",
+            "Finance", "Investments", "Startup", "Leadership",
+            "CBT Therapy", "Mindfulness", "Yoga & Health",
+            "Baking Basics", "African Food", "Vegan Recipes",
+            "Ancient World", "WWII History", "Geopolitics",
+            "Writing Guides", "Criticism", "Classic Poetry",
+            "Early Learning", "Teen Romance", "Survival",
+            "Urban Fantasy", "Dark Fantasy", "Psych Thriller", "Hard Sci-Fi",
+            "Data Science", "DevOps", "Cybersecurity",
+            "Economics", "Real Estate", "Governance",
+            "Essays", "Memoirs", "Art History",
+            "Architecture", "Photography", "Travel Writing",
+            "Gaming Culture", "Philosophy", "Ethics",
+            "DIY Home", "SA Gardening", "Parenting"
+        };
+
+        // 3. Seed Main Categories into the System
+        logger.LogInformation("Seeding broad main categories...");
+        foreach (var mainCat in broadMainCategories)
+        {
+            if (stoppingToken.IsCancellationRequested) return;
+
+            // Defensive truncation fallback just in case strings get modified later
+            string safeName = mainCat.Length > 15 ? mainCat.Substring(0, 15) : mainCat;
+
+            var result = await categoryService.CreateCategoryAsync(safeName, isMain: true, stoppingToken);
+            if (result.IsFailed && !result.Errors[0].Message.Contains("already exists", StringComparison.OrdinalIgnoreCase))
+            {
+                logger.LogWarning("Notice while adding main category '{Name}': {Msg}", safeName, result.Errors[0].Message);
+            }
+        }
+
+        // 4. Seed Subcategories into the System
+        logger.LogInformation("Seeding boundless specialized niche tags...");
+        foreach (var subCat in specializedSubCategories)
+        {
+            if (stoppingToken.IsCancellationRequested) return;
+
+            string safeName = subCat.Length > 15 ? subCat.Substring(0, 15) : subCat;
+
+            var result = await categoryService.CreateCategoryAsync(safeName, isMain: false, stoppingToken);
+            if (result.IsFailed && !result.Errors[0].Message.Contains("already exists", StringComparison.OrdinalIgnoreCase))
+            {
+                logger.LogWarning("Notice while adding subcategory '{Name}': {Msg}", safeName, result.Errors[0].Message);
+            }
+        }
+
+        // 5. Query back all enabled categories to extract active IDs for junction mapping
+        var fetchMainResult = await categoryService.GetCategoriesAsync(isMain: true, stoppingToken);
+        var fetchSubResult = await categoryService.GetCategoriesAsync(isMain: false, stoppingToken);
+
+        if (fetchMainResult.IsFailed || fetchSubResult.IsFailed)
+        {
+            logger.LogError("Aborting junction seeding: Could not retrieve categories from data store.");
+            return;
+        }
+
+        var mainCategoryIds = fetchMainResult.Value.Select(c => c.Id).ToArray();
+        var subCategoryIds = fetchSubResult.Value.Select(c => c.Id).ToArray();
+
+        // 6. Map Categories to your Product Collection (Product IDs 0 - 21)
+        logger.LogInformation("Beginning Product-Category mapping assignments for Product IDs 0 through 21...");
+
+        for (long productId = 0; productId <= 21; productId++)
+        {
+            if (stoppingToken.IsCancellationRequested) break;
+
+            // Every book belongs to 1 or 2 main categories
+            int mainCategoriesToAssign = faker.Random.Number(1, 2);
+            var chosenMainIds = faker.PickRandom(mainCategoryIds, mainCategoriesToAssign).Distinct();
+
+            foreach (var mainId in chosenMainIds)
+            {
+                var linkResult = await productService.AddProductCategoryAsync(productId, mainId, stoppingToken);
+                if (linkResult.IsFailed)
+                {
+                    if (!linkResult.Errors[0].Message.Contains("exist", StringComparison.OrdinalIgnoreCase))
+                    {
+                        logger.LogDebug("Junction note for Product {PId} and Main Category {CId}: {Msg}", productId, mainId, linkResult.Errors[0].Message);
+                    }
+                }
+            }
+
+            // Every book gets 1 to 4 granular subgenre tags
+            int subCategoriesToAssign = faker.Random.Number(1, 4);
+            var chosenSubIds = faker.PickRandom(subCategoryIds, subCategoriesToAssign).Distinct();
+
+            foreach (var subId in chosenSubIds)
+            {
+                var linkResult = await productService.AddProductCategoryAsync(productId, subId, stoppingToken);
+                if (linkResult.IsFailed && !linkResult.Errors[0].Message.Contains("exist", StringComparison.OrdinalIgnoreCase))
+                {
+                    logger.LogDebug("Junction note for Product {PId} and Sub Category {CId}: {Msg}", productId, subId, linkResult.Errors[0].Message);
+                }
+            }
+        }
+
+        logger.LogInformation("Category and Product-Tag Mapping Seeding completed successfully.");
+    }
+}

LiteCharms.Features.MidrandBooks.Seed/Program.cs

@@ -16,6 +16,7 @@ builder.Services
     .AddLogging()
     .AddShopServices()    
     .AddHostedService<ProductsSeederService>()
+    .AddHostedService<CategorySeederService>()
     .AddHostedService<CustomerSeederService>()
     .AddMidrandShopDatabase(builder.Configuration);
 

LiteCharms.Features.MidrandBooks.Seed/appsettings.json

@@ -1,5 +1,6 @@
 {
   "FeatureManagement": {
+    "CategorySeederService": true,
     "CustomerSeederService": false,
     "ProductsSeederService": false
   },

LiteCharms.Features.MidrandBooks/AuthorBooks/BooksService.cs

@@ -95,7 +95,7 @@ public sealed class BooksService(IDbContextFactory<MidrandBooksDbContext> contex
                 .AsNoTracking()
                 .Include(b => b.Author)
                 .Include(b => b.Product)
-                    .ThenInclude(b => b.Prices)
+                    .ThenInclude(b => b!.Prices)
                 .OrderByDescending(b => b.CreatedAt)
                 .Where(b => b.AuthorId == authorId)
                 .ToListAsync(cancellationToken);

LiteCharms.Features.MidrandBooks/Authors/AuthorService.cs

@@ -8,6 +8,29 @@ namespace LiteCharms.Features.MidrandBooks.Authors;
 
 public sealed class AuthorService(IDbContextFactory<MidrandBooksDbContext> contextFactory) : IService
 {
+    public async ValueTask<Result<Author>> GetAuthorByProductIdAsync(long productId, CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var author = await context.Books
+                .AsNoTracking()
+                .Include(i => i.Author)
+                .Where(b => b.ProductId == productId)                
+                .FirstOrDefaultAsync(cancellationToken);
+
+            if (author is null)
+                return Result.Fail<Author>(new Error($"No author association discovered for Product ID {productId}"));
+
+            return Result.Ok(author.Author!.ToModel());
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail<Author>(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+
     public async ValueTask<Result> UpdateAuthorStatusAsync(long authorId, bool isEnabled, CancellationToken cancellationToken = default)
     {
         try

LiteCharms.Features.MidrandBooks/Products/ProductService.cs

@@ -304,7 +304,9 @@ public sealed class ProductService(IDbContextFactory<MidrandBooksDbContext> cont
         {
             await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
 
-            var product = await context.Products.AsNoTracking().FirstOrDefaultAsync(p => p.Id == productId, cancellationToken);
+            var product = await context.Products
+                .Include(i => i.Price)
+                .AsNoTracking().FirstOrDefaultAsync(p => p.Id == productId, cancellationToken);
 
             return product is null
                 ? Result.Fail<Product>(new Error($"Product with ID {productId} not found."))