Added new API check if user with email exists or not

Marco.Pms.Services/Controllers/UserController.cs

@@ -6,8 +6,11 @@ using Marco.Pms.Model.Utilities;
 using Marco.Pms.Model.ViewModels.Employee;
 using Marco.Pms.Services.Service.ServiceInterfaces;
 using MarcoBMS.Services.Helpers;
+using MarcoBMS.Services.Service;
 using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
+using System.Net.Mail;
 
 namespace MarcoBMS.Services.Controllers
 {
@@ -18,14 +21,17 @@ namespace MarcoBMS.Services.Controllers
     public class UserController : ControllerBase
     {
         private readonly UserHelper _userHelper;
+        private readonly UserManager<ApplicationUser> _userManager;
         private readonly EmployeeHelper _employeeHelper;
-
+        private readonly ILoggingService _logger;
         private readonly IProjectServices _projectServices;
         private readonly RolesHelper _rolesHelper;
 
-        public UserController(EmployeeHelper employeeHelper, IProjectServices projectServices, UserHelper userHelper, RolesHelper rolesHelper)
+        public UserController(EmployeeHelper employeeHelper, UserManager<ApplicationUser> userManager, ILoggingService logger, IProjectServices projectServices, UserHelper userHelper, RolesHelper rolesHelper)
         {
+            _userManager = userManager;
             _userHelper = userHelper;
+            _logger = logger;
             _employeeHelper = employeeHelper;
             _projectServices = projectServices;
             _rolesHelper = rolesHelper;
@@ -81,5 +87,44 @@ namespace MarcoBMS.Services.Controllers
 
             return Ok(ApiResponse<object>.SuccessResponse(profile, "Success", 200));
         }
+
+        [HttpGet("email/{email}")]
+        public async Task<IActionResult> GetUserByEmail(string email)
+        {
+            var isvalid = IsValidEmail(email);
+            if (!isvalid)
+            {
+                _logger.LogWarning("User provided invalid email address");
+                return BadRequest(ApiResponse<object>.ErrorResponse("Invalid email", "Invalid email", 400));
+            }
+            var user = await _userManager.FindByEmailAsync(email);
+
+            if (user == null)
+            {
+                _logger.LogInfo("User with email {Email} not found in ASP.NET users table", email);
+                return Ok(ApiResponse<object>.SuccessResponse(true, "User not exists", 200));
+            }
+            else
+            {
+                _logger.LogInfo("User with email {Email} founded in ASP.NET users table", email);
+                return Ok(ApiResponse<object>.SuccessResponse(false, "User exists", 200));
+            }
+
+        }
+
+        private static bool IsValidEmail(string email)
+        {
+            if (string.IsNullOrWhiteSpace(email))
+                return false;
+            try
+            {
+                var addr = new MailAddress(email);
+                return addr.Address == email.Trim();
+            }
+            catch
+            {
+                return false;
+            }
+        }
     }
 }