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https://github.com/aaronpo97/the-biergarten-app.git
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Replace stored-procedure repositories with Dapper-based repositories
Removes the USP_* stored procedures for Auth, Location, and Brewery data access in favour of services built with Dapper. Adds a new Features.Locations slice and optimistic concurrency support for the Brewery slice.
This commit is contained in:
Aaron Po
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using Features.Locations.Repository;
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using Microsoft.Extensions.DependencyInjection;
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namespace Features.Locations.DependencyInjection;
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public static class FeaturesLocationsServiceCollectionExtensions
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{
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public static IServiceCollection AddFeaturesLocations(this IServiceCollection services)
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{
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services.AddScoped<ILocationRepository, LocationRepository>();
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return services;
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}
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}
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13
web/backend/Features/Features.Locations/Dtos/CityLocation.cs
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13
web/backend/Features/Features.Locations/Dtos/CityLocation.cs
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namespace Features.Locations.Dtos;
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/// <summary>
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/// Describes a city's location for resolution by <c>ILocationRepository</c>, including the
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/// state/province and country it belongs to.
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/// </summary>
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public sealed record CityLocation(
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string CityName,
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string StateProvinceName,
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string StateProvinceIsoCode,
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string CountryName,
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string CountryIsoCode
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);
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net10.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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<RootNamespace>Features.Locations</RootNamespace>
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</PropertyGroup>
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<ItemGroup>
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<FrameworkReference Include="Microsoft.AspNetCore.App" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\..\Domain\Domain.Entities\Domain.Entities.csproj" />
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<ProjectReference Include="..\..\Domain\Domain.Exceptions\Domain.Exceptions.csproj" />
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<ProjectReference Include="..\..\Infrastructure\Infrastructure.Sql\Infrastructure.Sql.csproj" />
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<ProjectReference Include="..\..\Shared\Shared.Contracts\Shared.Contracts.csproj" />
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<ProjectReference Include="..\..\Shared\Shared.Application\Shared.Application.csproj" />
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</ItemGroup>
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</Project>
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@@ -0,0 +1,16 @@
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using Features.Locations.Dtos;
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namespace Features.Locations.Repository;
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/// <summary>
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/// Resolves the Country/StateProvince/City location hierarchy shared by features that attach a
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/// location to a record (e.g. brewery posts, and eventually user accounts).
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/// </summary>
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public interface ILocationRepository
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{
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/// <summary>
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/// Resolves <paramref name="location" /> to a City ID, creating the Country, StateProvince,
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/// and/or City rows if any part of the chain doesn't exist yet.
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/// </summary>
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Task<Guid> GetOrCreateCityIdAsync(CityLocation location);
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}
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@@ -0,0 +1,158 @@
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using System.Data.Common;
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using Dapper;
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using Domain.Entities;
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using Domain.Exceptions;
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using Features.Locations.Dtos;
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using Infrastructure.Sql;
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namespace Features.Locations.Repository;
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/// <summary>
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/// Dapper-based implementation of <see cref="ILocationRepository" />.
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/// </summary>
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public class LocationRepository(ISqlConnectionFactory connectionFactory)
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: Repository<City>(connectionFactory),
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ILocationRepository
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{
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/// <inheritdoc />
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/// <remarks>
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/// Not fully race-safe under concurrent callers for the same new city (neither was the stored
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/// procedure this replaces, since <c>City</c> has no unique constraint on name+state): a
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/// concurrent duplicate insert can succeed rather than being rejected. Country/StateProvince
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/// creation guards against this the same way the original stored procedures did, via an
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/// existence pre-check immediately before the insert.
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/// </remarks>
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public async Task<Guid> GetOrCreateCityIdAsync(CityLocation location)
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{
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await EnsureCountryExistsAsync(location.CountryName, location.CountryIsoCode);
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await EnsureStateProvinceExistsAsync(
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location.StateProvinceName,
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location.StateProvinceIsoCode,
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location.CountryIsoCode
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);
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Guid? cityId = await GetCityIdAsync(location.CityName, location.StateProvinceIsoCode);
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if (cityId is not null)
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return cityId.Value;
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Guid stateProvinceId =
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await GetStateProvinceIdAsync(location.StateProvinceIsoCode)
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?? throw new NotFoundException(
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$"State/province '{location.StateProvinceIsoCode}' not found."
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);
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await using DbConnection connection = await CreateConnection();
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bool cityExists =
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await connection.ExecuteScalarAsync<int?>(
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"SELECT 1 FROM dbo.City WHERE CityName = @CityName AND StateProvinceID = @StateProvinceId",
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new { location.CityName, StateProvinceId = stateProvinceId }
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) is not null;
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if (!cityExists)
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await connection.ExecuteAsync(
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"INSERT INTO dbo.City (StateProvinceID, CityName) VALUES (@StateProvinceId, @CityName)",
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new { StateProvinceId = stateProvinceId, location.CityName }
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);
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return await GetCityIdAsync(location.CityName, location.StateProvinceIsoCode)
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?? throw new InvalidOperationException(
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$"City '{location.CityName}' was not found after creation."
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);
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}
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private async Task EnsureCountryExistsAsync(string countryName, string isoCode)
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{
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if (await GetCountryIdAsync(isoCode) is not null)
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return;
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await using DbConnection connection = await CreateConnection();
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bool exists =
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await connection.ExecuteScalarAsync<int?>(
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"SELECT 1 FROM dbo.Country WHERE ISO3166_1 = @ISO3166_1",
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new { ISO3166_1 = isoCode }
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) is not null;
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if (!exists)
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// A concurrent caller may create this country between the check above and here; that
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// race is tolerated (the resulting duplicate row, if any, is out of scope for this method).
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await connection.ExecuteAsync(
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"INSERT INTO dbo.Country (CountryName, ISO3166_1) VALUES (@CountryName, @ISO3166_1)",
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new { CountryName = countryName, ISO3166_1 = isoCode }
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);
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}
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/// <summary>
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/// Ensures a StateProvince row exists for <paramref name="isoCode" />.
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/// </summary>
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/// <exception cref="NotFoundException">
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/// Thrown when no Country exists for <paramref name="countryIsoCode" />. Not expected in normal
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/// operation, since callers ensure the Country exists first — retained as a defensive translation
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/// in case of a race between concurrent callers.
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/// </exception>
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private async Task EnsureStateProvinceExistsAsync(
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string stateProvinceName,
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string isoCode,
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string countryIsoCode
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)
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{
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if (await GetStateProvinceIdAsync(isoCode) is not null)
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return;
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Guid countryId =
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await GetCountryIdAsync(countryIsoCode)
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?? throw new NotFoundException($"Country '{countryIsoCode}' not found.");
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await using DbConnection connection = await CreateConnection();
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bool exists =
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await connection.ExecuteScalarAsync<int?>(
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"SELECT 1 FROM dbo.StateProvince WHERE ISO3166_2 = @ISO3166_2",
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new { ISO3166_2 = isoCode }
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) is not null;
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if (!exists)
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await connection.ExecuteAsync(
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"INSERT INTO dbo.StateProvince (StateProvinceName, ISO3166_2, CountryID) VALUES (@StateProvinceName, @ISO3166_2, @CountryId)",
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new
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{
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StateProvinceName = stateProvinceName,
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ISO3166_2 = isoCode,
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CountryId = countryId,
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}
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);
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}
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private async Task<Guid?> GetCountryIdAsync(string isoCode)
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{
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await using DbConnection connection = await CreateConnection();
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return await connection.ExecuteScalarAsync<Guid?>(
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"SELECT CountryID FROM dbo.Country WHERE ISO3166_1 = @ISO3166_1",
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new { ISO3166_1 = isoCode }
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);
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}
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private async Task<Guid?> GetStateProvinceIdAsync(string isoCode)
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{
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await using DbConnection connection = await CreateConnection();
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return await connection.ExecuteScalarAsync<Guid?>(
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"SELECT StateProvinceID FROM dbo.StateProvince WHERE ISO3166_2 = @ISO3166_2",
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new { ISO3166_2 = isoCode }
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);
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}
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private async Task<Guid?> GetCityIdAsync(string cityName, string stateProvinceIsoCode)
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{
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await using DbConnection connection = await CreateConnection();
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return await connection.ExecuteScalarAsync<Guid?>(
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"""
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SELECT c.CityID
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FROM dbo.City c
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INNER JOIN dbo.StateProvince sp ON sp.StateProvinceID = c.StateProvinceID
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WHERE c.CityName = @CityName AND sp.ISO3166_2 = @StateProvinceCode
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""",
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new { CityName = cityName, StateProvinceCode = stateProvinceIsoCode }
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);
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}
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}
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