* Maintain DataModel for User, Role, Function and UserRole

OrdersManagementDataModel/Services/RoleService.cs

@@ -0,0 +1,54 @@
+using AutoMapper;
+using Microsoft.EntityFrameworkCore;
+using OrdersManagementDataModel.Dtos;
+using OrdersManagementDataModel.Entities;
+
+namespace OrdersManagementDataModel.Services;
+
+public class RoleService(OrdersManagementDbContext context, IMapper mapper) : IRoleService
+{
+    public async Task<IEnumerable<RoleDto>> GetRoles()
+    {
+        IList<RoleDto> roles = await context.Roles.Select(x => mapper.Map<RoleDto>(x)).ToListAsync();
+
+        return roles;
+    }
+    
+    public async Task<RoleDto?> GetRoleById(Guid id)
+    {
+        RoleDto? role = await context.Roles.Where(x => x.RowPointer == id)
+            .Select(x => mapper.Map<RoleDto>(x)).FirstOrDefaultAsync();
+        
+        return role;
+    }
+    
+    public async Task<RoleDto?> GetRoleByName(string name)
+    {
+        RoleDto? role = await context.Roles.Where(x => x.Name == name)
+            .Select(x => mapper.Map<RoleDto>(x)).FirstOrDefaultAsync();
+        
+        return role;
+    }
+    
+    public async Task<int> AddRole(RoleDto roleDto)
+    {
+        Role role = new Role
+        {
+            Name = roleDto.Name,
+            RowPointer = Guid.NewGuid()
+        };
+        
+        context.Roles.Add(role);
+        return await context.SaveChangesAsync();
+    }
+    
+    public async Task<int> DeleteRole(Guid id)
+    {
+        Role? role = await context.Roles.Where(x => x.RowPointer == id).FirstOrDefaultAsync() ?? null;
+
+        if (role == null) return 0;
+
+        context.Roles.Remove(role);
+        return await context.SaveChangesAsync();
+    }
+}