Implement gRPC search service

Dockerfile

@@ -7,7 +7,8 @@ RUN dotnet publish -c Release -o out
 
 FROM mcr.microsoft.com/dotnet/aspnet:6.0
 EXPOSE 5000
+EXPOSE 43000
 WORKDIR /app
 COPY  --from=build /app/out .
 ENV ASPNETCORE_ENVIRONMENT Production
-ENTRYPOINT [ "dotnet", "RhSolutions.Api.dll", "--urls=http://0.0.0.0:5000" ]
+ENTRYPOINT [ "dotnet", "RhSolutions.Api.dll" ]

RhSolutions.Api/Program.cs

@@ -4,7 +4,7 @@ using RhSolutions.Api.Services;
 using RhSolutions.Api.Middleware;
 using RhSolutions.QueryModifiers;
 
-var builder = WebApplication.CreateBuilder(args);
+var builder = WebApplication.CreateBuilder();
 
 string dbHost = builder.Configuration["DB_HOST"],
 	dbPort = builder.Configuration["DB_PORT"],
@@ -23,17 +23,18 @@ builder.Services.AddDbContext<RhSolutionsContext>(opts =>
 		opts.EnableSensitiveDataLogging(true);
 	}
 });
+
 builder.Services.AddScoped<IPricelistParser, ClosedXMLParser>()
 	.AddScoped<IProductTypePredicter, ProductTypePredicter>()
-	.AddSingleton<ProductQueryModifierFactory>();
+	.AddSingleton<ProductQueryModifierFactory>()
+	.AddGrpc();
+
 builder.Services.AddControllers();
 
 var app = builder.Build();
 
 app.MapControllers();
+app.MapGrpcService<SearchService>();
 app.UseMiddleware<QueryModifier>();
 
-var context = app.Services.CreateScope().ServiceProvider
-	.GetRequiredService<RhSolutionsContext>();
-	
 app.Run();

RhSolutions.Api/Properties/launchSettings.json

@@ -4,7 +4,7 @@
     "anonymousAuthentication": true,
     "launchBrowser": false,
     "iisExpress": {
-      "applicationUrl": "http://localhost:5000",
+      "applicationUrl": "http://localhost:5000;http://localhost:43000",
       "sslPort": 0
     }
   },
@@ -13,7 +13,7 @@
       "commandName": "Project",
       "dotnetRunMessages": true,
       "launchBrowser": false,
-      "applicationUrl": "http://localhost:5000",
+      "applicationUrl": "http://localhost:5000;http://localhost:43000",
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
       }

RhSolutions.Api/Protos/product.proto

@@ -0,0 +1,15 @@
+syntax = "proto3";
+
+service ProductSearch {
+  rpc GetProduct (ProductRequest) returns (ProductReply);
+}
+
+message ProductRequest {
+  string query = 1;
+}
+
+message ProductReply {
+  string id = 1;
+  string name = 2;
+  double price = 3;
+}

RhSolutions.Api/RhSolutions.Api.csproj

@@ -9,6 +9,11 @@
 
   <ItemGroup>
     <PackageReference Include="ClosedXML" Version="0.100.0" />
+    <PackageReference Include="Grpc.AspnetCore" Version="2.58.0" />
+    <PackageReference Include="Grpc.Tools" Version="2.59.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
@@ -29,4 +34,9 @@
     </None>
   </ItemGroup>
 
+  <ItemGroup>
+    <Protobuf Include="Protos\product.proto" GrpcServices="Server" />
+  </ItemGroup>
+
+
 </Project>

RhSolutions.Api/Services/SearchService.cs

@@ -0,0 +1,48 @@
+using Grpc.Core;
+using RhSolutions.Models;
+using Microsoft.EntityFrameworkCore;
+using RhSolutions.QueryModifiers;
+
+namespace RhSolutions.Api.Services;
+
+public class SearchService : ProductSearch.ProductSearchBase
+{
+	private RhSolutionsContext _dbContext;
+	private IProductTypePredicter _typePredicter;
+	private ProductQueryModifierFactory _productQueryModifierFactory;
+
+	public SearchService(RhSolutionsContext dbContext, IProductTypePredicter typePredicter, ProductQueryModifierFactory productQueryModifierFactory)
+	{
+		_dbContext = dbContext;
+		_typePredicter = typePredicter;
+		_productQueryModifierFactory = productQueryModifierFactory;
+	}
+	public override async Task<ProductReply?> GetProduct(ProductRequest request, ServerCallContext context)
+	{
+		var productType = _typePredicter.GetPredictedProductType(request.Query);
+		var modifier = _productQueryModifierFactory.GetModifier(productType!);
+		string query = request.Query;
+		if (modifier.TryQueryModify(query, out var modified))
+		{
+			query = modified;
+		}
+		var product = await _dbContext.Products
+				.Where(p => EF.Functions.ToTsVector(
+					"russian", string.Join(' ', new[] { p.Name, string.Join(' ', p.ProductLines) }))
+					.Matches(EF.Functions.WebSearchToTsQuery("russian", query)))
+				.OrderByDescending(p => p.IsOnWarehouse)
+				.FirstOrDefaultAsync();
+
+		if (product != null)
+		{
+			return new ProductReply()
+			{
+				Id = product.Id,
+				Name = product.Name,
+				Price = (double)product.Price
+			};
+		}
+		return null;
+	}
+}
+

RhSolutions.Api/appsettings.json

@@ -6,5 +6,17 @@
       "Microsoft.EntityFrameworkCore": "Information"
     }
   },
-     "AllowedHosts": "*"
+  "AllowedHosts": "*",
+  "Kestrel": {
+    "Endpoints": {
+      "Http": {
+        "Url": "http://0.0.0.0:5000",
+        "Protocols": "Http1AndHttp2"
+      },
+      "gRPC": {
+        "Url": "http://0.0.0.0:43000",
+        "Protocols": "Http2"
       }
+    }
+  }
+}