add architecture skeleton

GymLogAI.Persistence/Repositories/ExerciseRepository.cs

@@ -0,0 +1,27 @@
+using GymLogAI.Application.Interfaces;
+using GymLogAI.Core.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace GymLogAI.Persistence.Repositories;
+
+public sealed class ExerciseRepository(AppDbContext dbContext) : IExerciseRepository
+{
+    public async Task<Exercise?> GetByNameAsync(string name, CancellationToken cancellationToken)
+    {
+        return await dbContext.Exercises.SingleOrDefaultAsync(x => x.Name == name, cancellationToken);
+    }
+
+    public async Task<Exercise> AddAsync(Exercise exercise, CancellationToken cancellationToken)
+    {
+        dbContext.Exercises.Add(exercise);
+        await dbContext.SaveChangesAsync(cancellationToken);
+        return exercise;
+    }
+
+    public async Task<Exercise> UpdateAsync(Exercise exercise, CancellationToken cancellationToken)
+    {
+        dbContext.Exercises.Update(exercise);
+        await dbContext.SaveChangesAsync(cancellationToken);
+        return exercise;
+    }
+}