Add query for email verification link (#6984)

* Add query for email verification link

* PR comments

util/Seeder/Queries/UserEmailVerificationQuery.cs

@@ -0,0 +1,54 @@
+using System.Globalization;
+using System.Net;
+using Bit.Core.Auth.Models.Business.Tokenables;
+using Bit.Core.Repositories;
+using Bit.Core.Tokens;
+
+namespace Bit.Seeder.Queries;
+
+public class UserEmailVerificationQuery(IUserRepository userRepository,
+    IDataProtectorTokenFactory<RegistrationEmailVerificationTokenable> dataProtectorTokenizer) : IQuery<UserEmailVerificationQuery.Request, UserEmailVerificationQuery.Response>
+{
+    public class Request
+    {
+        public string? Name { get; set; } = null;
+        public required string Email { get; set; }
+        public string? FromMarketing { get; set; } = null;
+        public bool ReceiveMarketingEmails { get; set; } = false;
+    }
+
+    public class Response
+    {
+        public required string Url { get; set; }
+        public required bool EmailVerified { get; set; }
+    }
+
+    public async Task<Response> Execute(Request request)
+    {
+        var user = await userRepository.GetByEmailAsync(request.Email);
+
+        var token = generateToken(request.Email, request.Name, request.ReceiveMarketingEmails);
+
+        return new()
+        {
+            Url = Url(token, request.Email, request.FromMarketing),
+            EmailVerified = user?.EmailVerified ?? false
+        };
+    }
+
+    private string Url(string token, string email, string? fromMarketing = null)
+    {
+        return string.Format(CultureInfo.InvariantCulture, "/redirect-connector.html#finish-signup?token={0}&email={1}&fromEmail=true{2}",
+            WebUtility.UrlEncode(token),
+            WebUtility.UrlEncode(email),
+            !string.IsNullOrEmpty(fromMarketing) ? $"&fromMarketing={fromMarketing}" : string.Empty);
+    }
+
+    private string generateToken(string email, string? name, bool receiveMarketingEmails)
+    {
+
+        return dataProtectorTokenizer.Protect(
+            new RegistrationEmailVerificationTokenable(email, name, receiveMarketingEmails)
+        );
+    }
+}