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using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using SCMS.Database.Models;
using SCMS.Domain.Common;
using SCMS.Domain.Features.Users.Models;
using SCMS.Domain.Security;
using SCMS.Shared;
namespace SCMS.Domain.Features.Users
{
public class UserService : IUserService
{
private readonly AppDbContext _context;
private readonly PasswordHashingService _passwords;
private readonly IPermissionService _permissionService;
public UserService(
AppDbContext context,
PasswordHashingService passwords,
IPermissionService permissionService)
{
_context = context;
_passwords = passwords;
_permissionService = permissionService;
}
public async Task<PagedResult<GetUsersResponse>> GetUsersAsync(
GetUsersRequest request,
CancellationToken cancellationToken = default)
{
request ??= new GetUsersRequest();
if (request.PageNumber <= 0) request.PageNumber = 1;
if (request.PageSize <= 0) request.PageSize = 10;
var query = _context.TblUsers
.AsNoTracking()
.Include(u => u.TblUserRoles)
.Where(u => u.DeleteFlag != true);
if (!string.IsNullOrWhiteSpace(request.Role))
{
var normRole = request.Role.Trim().ToLowerInvariant();
query = query.Where(u => u.TblUserRoles.Any(r => r.Role.ToLower() == normRole));
}
var totalCount = await query.CountAsync(cancellationToken);
var usersList = await query
.OrderBy(u => u.UserId)
.Skip((request.PageNumber - 1) * request.PageSize)
.Take(request.PageSize)
.ToListAsync(cancellationToken);
var users = usersList.Select(u => new GetUsersResponse
{
UserId = u.UserId,
Name = u.Name,
Email = u.Email,
MobileNo = u.MobileNo,
Roles = u.TblUserRoles.Select(r => r.Role).Distinct().ToList(),
CreatedAt = u.CreatedAt
}).ToList();
var pagination = new Pagination(request.PageNumber, request.PageSize, totalCount);
return PagedResult<GetUsersResponse>.Success(users, pagination);
}
public async Task<PagedResult<SearchUsersResponse>> SearchUsersAsync(
SearchUsersRequest request,
CancellationToken cancellationToken = default)
{
request ??= new SearchUsersRequest();
if (request.PageNumber <= 0) request.PageNumber = 1;
if (request.PageSize <= 0) request.PageSize = 10;
var query = _context.TblUsers
.AsNoTracking()
.Include(u => u.TblUserRoles)
.Where(u => u.DeleteFlag != true);
if (!string.IsNullOrWhiteSpace(request.Role))
{
var normRole = request.Role.Trim().ToLowerInvariant();
query = query.Where(u => u.TblUserRoles.Any(r => r.Role.ToLower() == normRole));
}
if (!string.IsNullOrWhiteSpace(request.Query))
{
var term = request.Query.Trim().ToLower();
query = query.Where(u =>
u.Name.ToLower().Contains(term) ||
(u.Email != null && u.Email.ToLower().Contains(term)) ||
(u.MobileNo != null && u.MobileNo.Contains(term)));
}
var totalCount = await query.CountAsync(cancellationToken);
var usersList = await query
.OrderBy(u => u.UserId)
.Skip((request.PageNumber - 1) * request.PageSize)
.Take(request.PageSize)
.ToListAsync(cancellationToken);
var users = usersList.Select(u => new SearchUsersResponse
{
UserId = u.UserId,
Name = u.Name,
Email = u.Email,
MobileNo = u.MobileNo,
Roles = u.TblUserRoles.Select(r => r.Role).Distinct().ToList(),
CreatedAt = u.CreatedAt
}).ToList();
var pagination = new Pagination(request.PageNumber, request.PageSize, totalCount);
return PagedResult<SearchUsersResponse>.Success(users, pagination);
}
public async Task<Result<GetUserByIdResponse>> GetUserByIdAsync(int userId, CancellationToken cancellationToken = default)
{
var user = await _context.TblUsers
.AsNoTracking()
.Include(u => u.TblUserRoles)
.FirstOrDefaultAsync(u => u.UserId == userId && u.DeleteFlag != true, cancellationToken);
if (user == null)
{
return Result<GetUserByIdResponse>.Failure("User not found.");
}
var response = new GetUserByIdResponse
{
UserId = user.UserId,
Name = user.Name,
Email = user.Email,
MobileNo = user.MobileNo,
Roles = user.TblUserRoles.Select(r => r.Role).Distinct().ToList(),
CreatedAt = user.CreatedAt
};
return Result<GetUserByIdResponse>.Success(response);
}
public async Task<Result<CreateStaffUserResponse>> CreateStaffUserAsync(
CreateStaffUserRequest request,
CancellationToken cancellationToken = default)
{
if (string.IsNullOrWhiteSpace(request.Name))
{
return Result<CreateStaffUserResponse>.Failure("Name is required.");
}
string? email = null;
if (!string.IsNullOrWhiteSpace(request.Email))
{
if (!ValidationHelper.IsValidEmail(request.Email, out var normEmail))
{
return Result<CreateStaffUserResponse>.Failure("A valid email address is required.");
}
email = normEmail;
}
string? mobile = null;
if (!string.IsNullOrWhiteSpace(request.MobileNo))
{
if (!ValidationHelper.IsValidMyanmarMobile(request.MobileNo, out var normMobile))
{
return Result<CreateStaffUserResponse>.Failure("Invalid mobile number. Please provide a valid Myanmar mobile number (e.g. 09xxxxxxxxx or +959xxxxxxxxx).");
}
mobile = normMobile;
}
if (string.IsNullOrWhiteSpace(email) && string.IsNullOrWhiteSpace(mobile))
{
return Result<CreateStaffUserResponse>.Failure("Either an email address or mobile number is required.");
}
if (string.IsNullOrWhiteSpace(request.Password) || request.Password.Length < 8)
{
return Result<CreateStaffUserResponse>.Failure("Password must be at least 8 characters.");
}
var cleanRoles = request.Roles
.Where(r => !string.IsNullOrWhiteSpace(r))
.Select(r => r.Trim())
.Distinct(StringComparer.OrdinalIgnoreCase)
.ToList();
if (cleanRoles.Count == 0)
{
return Result<CreateStaffUserResponse>.Failure("At least one valid role must be assigned.");
}
var exists = await _context.TblUsers.AnyAsync(u =>
u.DeleteFlag != true &&
((email != null && u.Email == email) || (mobile != null && u.MobileNo == mobile)),
cancellationToken);
if (exists)
{
return Result<CreateStaffUserResponse>.Failure("An account with that email or mobile number already exists.");
}
var now = DateTime.UtcNow;
var user = new TblUser
{
Name = request.Name.Trim(),
Email = email,
MobileNo = mobile,
PasswordHash = _passwords.HashPassword(request.Password),
CreatedAt = now,
UpdatedAt = now,
DeleteFlag = false
};
foreach (var role in cleanRoles)
{
var userRole = new TblUserRole
{
Role = role
};
// Copy permissions from any existing template / peer user role of the same role name
var existingRolePermissions = await _context.TblRolePermissions
.AsNoTracking()
.Where(rp => _context.TblUserRoles.Any(ur => ur.Id == rp.RoleId && ur.Role.ToLower() == role.ToLower()))
.Select(rp => rp.PermissionId)
.Distinct()
.ToListAsync(cancellationToken);
foreach (var permId in existingRolePermissions)
{
userRole.TblRolePermissions.Add(new TblRolePermission
{
PermissionId = permId
});
}
user.TblUserRoles.Add(userRole);
}
_context.TblUsers.Add(user);
await _context.SaveChangesAsync(cancellationToken);
var response = new CreateStaffUserResponse
{
UserId = user.UserId,
Name = user.Name,
Email = user.Email,
MobileNo = user.MobileNo,
Roles = cleanRoles,
CreatedAt = user.CreatedAt
};
_permissionService.InvalidateUserPermissions(user.UserId);
return Result<CreateStaffUserResponse>.Success(response, "User created successfully.");
}
public async Task<Result<UpdateUserRolesResponse>> UpdateUserRolesAsync(
int userId,
UpdateUserRolesRequest request,
CancellationToken cancellationToken = default)
{
var user = await _context.TblUsers
.Include(u => u.TblUserRoles)
.ThenInclude(ur => ur.TblRolePermissions)
.FirstOrDefaultAsync(u => u.UserId == userId && u.DeleteFlag != true, cancellationToken);
if (user == null)
{
return Result<UpdateUserRolesResponse>.Failure("User not found.");
}
var cleanRoles = request.Roles
.Where(r => !string.IsNullOrWhiteSpace(r))
.Select(r => r.Trim())
.Distinct(StringComparer.OrdinalIgnoreCase)
.ToList();
if (cleanRoles.Count == 0)
{
return Result<UpdateUserRolesResponse>.Failure("At least one valid role must be specified.");
}
// Remove old roles and their permissions
_context.TblRolePermissions.RemoveRange(user.TblUserRoles.SelectMany(ur => ur.TblRolePermissions));
_context.TblUserRoles.RemoveRange(user.TblUserRoles);
foreach (var role in cleanRoles)
{
var userRole = new TblUserRole
{
UserId = user.UserId,
Role = role
};
var existingRolePermissions = await _context.TblRolePermissions
.AsNoTracking()
.Where(rp => _context.TblUserRoles.Any(ur => ur.Id == rp.RoleId && ur.Role.ToLower() == role.ToLower()))
.Select(rp => rp.PermissionId)
.Distinct()
.ToListAsync(cancellationToken);
foreach (var permId in existingRolePermissions)
{
userRole.TblRolePermissions.Add(new TblRolePermission
{
PermissionId = permId
});
}
_context.TblUserRoles.Add(userRole);
}
user.UpdatedAt = DateTime.UtcNow;
await _context.SaveChangesAsync(cancellationToken);
_permissionService.InvalidateUserPermissions(user.UserId);
var response = new UpdateUserRolesResponse
{
UserId = user.UserId,
Name = user.Name,
Email = user.Email,
MobileNo = user.MobileNo,
Roles = cleanRoles,
CreatedAt = user.CreatedAt
};
return Result<UpdateUserRolesResponse>.Success(response, "User roles updated successfully.");
}
public async Task<Result> DeleteUserAsync(int userId, CancellationToken cancellationToken = default)
{
var user = await _context.TblUsers
.Include(u => u.TblUserRoles)
.FirstOrDefaultAsync(u => u.UserId == userId && u.DeleteFlag != true, cancellationToken);
if (user == null)
{
return Result.Failure("User not found.");
}
if (user.TblUserRoles.Any(r => string.Equals(r.Role, "owner", StringComparison.OrdinalIgnoreCase)))
{
return Result.Failure("The Owner account cannot be deleted.");
}
// Check if user has active appointments
var activeAppointments = await _context.TblAppointments
.CountAsync(a => a.Patient.UserId == userId && a.Status != "completed" && a.Status != "cancelled", cancellationToken);
if (activeAppointments > 0)
{
return Result.Failure($"Cannot delete user account '{user.Name}' because they have {activeAppointments} active or upcoming appointment(s). Please complete or cancel those appointments first.");
}
user.DeleteFlag = true;
user.UpdatedAt = DateTime.UtcNow;
// Invalidate user tokens
var tokens = await _context.TblUserTokens
.Where(t => t.UserId == userId && !t.Revoked)
.ToListAsync(cancellationToken);
foreach (var token in tokens)
{
token.Revoked = true;
}
await _context.SaveChangesAsync(cancellationToken);
_permissionService.InvalidateUserPermissions(userId);
return Result.Success("User deleted successfully.");
}
}
}
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