shoc-backend/SeaHaven.Services/Implementation/WorkOrderFieldLockService.cs

using Data.SeaHavenIndustries;
using Microsoft.EntityFrameworkCore;
using SeaHaven.Services.Interfaces;

namespace SeaHaven.Services.Implementation
{
    public class WorkOrderFieldLockService : IWorkOrderFieldLockService
    {
        private readonly ApplicationDbContext _context;

        public WorkOrderFieldLockService(ApplicationDbContext context)
        {
            _context = context;
        }

        public async Task<bool> IsLockedAsync(int workOrderId, string fieldName)
        {
            if (IsTracked(workOrderId, fieldName))
                return true;

            return await _context.WorkOrderFieldLocks
                .AnyAsync(l => l.WorkOrderId == workOrderId && l.FieldName == fieldName);
        }

        public async Task LockFieldAsync(int workOrderId, string fieldName, string? userId)
        {
            if (IsTracked(workOrderId, fieldName))
                return;

            if (await IsLockedAsync(workOrderId, fieldName))
                return;

            _context.WorkOrderFieldLocks.Add(new WorkOrderFieldLock
            {
                WorkOrderId = workOrderId,
                FieldName = fieldName,
                LockedAt = DateTime.UtcNow,
                LockedByUserId = userId
            });
        }

        private bool IsTracked(int workOrderId, string fieldName)
            => _context.WorkOrderFieldLocks.Local.Any(l =>
                l.WorkOrderId == workOrderId &&
                string.Equals(l.FieldName, fieldName, StringComparison.OrdinalIgnoreCase));
    }
}