Imap flow.

2026-04-19 20:13:09 +02:00
parent 496c7735f7
commit 3bd0b69429
16 changed files with 277 additions and 24 deletions
@@ -0,0 +1,64 @@
+using System;
+using System.Net.Mail;
+
+namespace Wino.Core.Domain.Validation;
+
+public static class MailAccountAddressValidator
+{
+    public static bool IsValid(string address)
+    {
+        if (string.IsNullOrWhiteSpace(address))
+            return false;
+
+        var trimmedAddress = address.Trim();
+
+        if (trimmedAddress.Contains('\r') || trimmedAddress.Contains('\n'))
+            return false;
+
+        try
+        {
+            var parsedAddress = new MailAddress(trimmedAddress);
+            return parsedAddress.Address.Equals(trimmedAddress, StringComparison.OrdinalIgnoreCase);
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    public static bool TryGetDomain(string address, out string domain)
+    {
+        domain = string.Empty;
+
+        if (!IsValid(address))
+            return false;
+
+        var trimmedAddress = address.Trim();
+        var separatorIndex = trimmedAddress.LastIndexOf('@');
+
+        if (separatorIndex <= 0 || separatorIndex >= trimmedAddress.Length - 1)
+            return false;
+
+        domain = trimmedAddress[(separatorIndex + 1)..];
+        return !string.IsNullOrWhiteSpace(domain);
+    }
+
+    public static bool IsImplicitlyResolvableHost(string host)
+    {
+        if (string.IsNullOrWhiteSpace(host))
+            return false;
+
+        var normalizedHost = host.Trim().TrimEnd('.');
+        if (string.IsNullOrWhiteSpace(normalizedHost))
+            return false;
+
+        if (normalizedHost.Equals("localhost", StringComparison.OrdinalIgnoreCase))
+            return true;
+
+        var hostType = Uri.CheckHostName(normalizedHost);
+        if (hostType is UriHostNameType.IPv4 or UriHostNameType.IPv6)
+            return true;
+
+        return normalizedHost.IndexOf('.') < 0;
+    }
+}