Refactor: Revert to hard deletes for messages. Remove IsDeleted flag and update repository and configurations accordingly.

Govor.Data/Repositories/GroupRepository.cs

@@ -1,6 +1,56 @@
+using Govor.Core.Models;
+using Govor.Core.Repositories.Groups;
+using Microsoft.EntityFrameworkCore;
+using System.Threading.Tasks;
+using System;
+using System.Linq; // Required for AnyAsync
+
 namespace Govor.Data.Repositories;
 
-public class GroupRepository
+public class GroupRepository : IGroupsRepository
 {
-    
+    private readonly GovorDbContext _context;
+
+    public GroupRepository(GovorDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<bool> ExistsAsync(Guid groupId)
+    {
+        return await _context.ChatGroups.AnyAsync(g => g.Id == groupId);
+    }
+
+    public async Task<bool> IsUserMemberOfGroupAsync(Guid userId, Guid groupId)
+    {
+        // Assuming ChatGroup has a navigation property 'Members' or a 'GroupMemberships' table
+        // Adjust based on your actual data model for group membership
+        var group = await _context.ChatGroups
+            .Include(g => g.Memberships) // Assuming GroupMembership links User and Group
+            .FirstOrDefaultAsync(g => g.Id == groupId);
+
+        if (group == null)
+        {
+            return false; // Group doesn't exist
+        }
+        // Check if any membership for this group includes the user
+        return group.Memberships.Any(m => m.UserId == userId);
+    }
+
+    // Implement other IGroupsReader methods if any were defined beyond ExistsAsync and IsUserMemberOfGroupAsync
+    // For example:
+    // public async Task<ChatGroup?> GetByIdAsync(Guid groupId)
+    // {
+    //     return await _context.ChatGroups.FindAsync(groupId);
+    // }
+
+    // public async Task<List<User>> GetGroupMembersAsync(Guid groupId)
+    // {
+    //     var group = await _context.ChatGroups
+    //         .Include(g => g.Memberships)
+    //         .ThenInclude(gm => gm.User)
+    //         .FirstOrDefaultAsync(g => g.Id == groupId);
+    //     if (group == null) return new List<User>();
+    //     return group.Memberships.Select(gm => gm.User).ToList();
+    // }
 }