Sync phone contacts and enable chat deletion

server/QMax.Api/Controllers/ContactsController.cs

@@ -21,8 +21,62 @@ public sealed class ContactsController(IMaxBridgeClient maxBridge) : ControllerB
                 contact.DisplayName,
                 contact.AvatarUrl,
                 contact.PhoneNumber,
-                contact.Status))
+                contact.Status,
+                contact.IsSavedContact))
             .OrderBy(contact => contact.DisplayName, StringComparer.CurrentCultureIgnoreCase)
             .ToArray();
     }
+
+    [HttpPost("import")]
+    public async Task<ActionResult<IReadOnlyList<ContactDto>>> ImportContacts(
+        ImportPhoneContactsRequest request,
+        CancellationToken cancellationToken)
+    {
+        var contacts = request.Contacts
+            .Where(contact => !string.IsNullOrWhiteSpace(contact.PhoneNumber))
+            .Take(5000)
+            .Select(contact => new MaxPhoneContact(
+                contact.PhoneNumber.Trim(),
+                string.IsNullOrWhiteSpace(contact.FirstName) ? contact.PhoneNumber.Trim() : contact.FirstName.Trim(),
+                contact.LastName?.Trim()))
+            .ToArray();
+        if (contacts.Length == 0)
+        {
+            return BadRequest("contacts with phone numbers are required.");
+        }
+
+        var imported = await maxBridge.ImportContactsAsync(contacts, cancellationToken);
+        return imported.Select(ToDto).ToArray();
+    }
+
+    [HttpPost("add")]
+    public async Task<ActionResult<ContactDto>> AddContact(ContactUserRequest request, CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(request.UserId))
+        {
+            return BadRequest("userId is required.");
+        }
+        var contact = await maxBridge.AddContactAsync(request.UserId.Trim(), cancellationToken);
+        return contact is null ? BadRequest("MAX did not add the contact.") : ToDto(contact);
+    }
+
+    [HttpPost("remove")]
+    public async Task<IActionResult> RemoveContact(ContactUserRequest request, CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(request.UserId))
+        {
+            return BadRequest("userId is required.");
+        }
+        var result = await maxBridge.RemoveContactAsync(request.UserId.Trim(), cancellationToken);
+        return result.Success ? NoContent() : BadRequest(result.Error ?? "MAX did not remove the contact.");
+    }
+
+    private static ContactDto ToDto(MaxContact contact) => new(
+        contact.UserId,
+        contact.ExternalChatId,
+        contact.DisplayName,
+        contact.AvatarUrl,
+        contact.PhoneNumber,
+        contact.Status,
+        contact.IsSavedContact);
 }