feat: добавил изменение промта для админа

backend/UniVerse.Infrastructure/Services/ReviewPromptService.cs

@@ -0,0 +1,70 @@
+using Microsoft.EntityFrameworkCore;
+using UniVerse.Application.DTOs.Reviews;
+using UniVerse.Application.Interfaces;
+using UniVerse.Application.Prompts;
+using UniVerse.Domain.Entities;
+using UniVerse.Domain.Exceptions;
+using UniVerse.Infrastructure.Data;
+
+namespace UniVerse.Infrastructure.Services;
+
+public class ReviewPromptService : IReviewPromptService
+{
+    private readonly AppDbContext _db;
+
+    public ReviewPromptService(AppDbContext db)
+    {
+        _db = db;
+    }
+
+    public async Task<ReviewPromptDto> GetAsync()
+    {
+        var setting = await _db.ReviewPromptSettings
+            .AsNoTracking()
+            .FirstOrDefaultAsync(s => s.Id == ReviewPromptSetting.SingletonId);
+
+        return setting is null
+            ? new ReviewPromptDto(ReviewPromptTemplate.Default, null)
+            : new ReviewPromptDto(setting.Prompt, setting.UpdatedAt);
+    }
+
+    public async Task<ReviewPromptDto> UpdateAsync(UpdateReviewPromptRequest request)
+    {
+        ValidatePrompt(request.Prompt);
+
+        var now = DateTime.UtcNow;
+        var setting = await _db.ReviewPromptSettings
+            .FirstOrDefaultAsync(s => s.Id == ReviewPromptSetting.SingletonId);
+
+        if (setting is null)
+        {
+            setting = new ReviewPromptSetting
+            {
+                Id = ReviewPromptSetting.SingletonId,
+                Prompt = request.Prompt,
+                CreatedAt = now,
+                UpdatedAt = now
+            };
+            _db.ReviewPromptSettings.Add(setting);
+        }
+        else
+        {
+            setting.Prompt = request.Prompt;
+            setting.UpdatedAt = now;
+        }
+
+        await _db.SaveChangesAsync();
+
+        return new ReviewPromptDto(setting.Prompt, setting.UpdatedAt);
+    }
+
+    private static void ValidatePrompt(string prompt)
+    {
+        if (string.IsNullOrWhiteSpace(prompt))
+            throw new BadRequestException("Prompt must not be empty.");
+
+        if (!ReviewPromptTemplate.HasRequiredPlaceholders(prompt))
+            throw new BadRequestException(
+                $"Prompt must contain {ReviewPromptTemplate.LectureContextPlaceholder} and {ReviewPromptTemplate.ReviewTextPlaceholder} placeholders.");
+    }
+}