Search user by username with send message test. (#356)

* Search user by username with send message test.

TLSharp.Core/TelegramClient.cs

@@ -337,6 +337,23 @@ namespace TLSharp.Core
             await _sender.SendPingAsync();
         }
 
+        /// <summary>
+        /// Serch user or chat. API: contacts.search#11f812d8 q:string limit:int = contacts.Found;
+        /// </summary>
+        /// <param name="q">User or chat name</param>
+        /// <param name="limit">Max result count</param>
+        /// <returns></returns>
+        public async Task<TLFound> SearchUserAsync(string q, int limit = 10)
+        {
+            var r = new TeleSharp.TL.Contacts.TLRequestSearch
+            {
+                q = q,
+                limit = limit
+            };
+
+            return await SendRequestAsync<TLFound>(r);
+        }
+
         private void OnUserAuthenticated(TLUser TLUser)
         {
             _session.TLUser = TLUser;

TLSharp.Tests.NUnit/Test.cs

@@ -75,5 +75,11 @@ namespace TLSharp.Tests
         {
             await base.FloodExceptionShouldNotCauseCannotReadPackageLengthError();
         }
+
+        [Test]
+        public override async Task SendMessageByUserNameTest()
+        {
+            await base.SendMessageByUserNameTest();
+        }
     }
 }

TLSharp.Tests.VS/TLSharpTestsVs.cs

@@ -73,5 +73,11 @@ namespace TLSharp.Tests
         {
             await base.FloodExceptionShouldNotCauseCannotReadPackageLengthError();
         }
+
+        [TestMethod]
+        public override async Task SendMessageByUserNameTest()
+        {
+            await base.SendMessageByUserNameTest();
+        }
     }
 }

TLSharp.Tests/TLSharpTests.cs

@@ -323,6 +323,7 @@ namespace TLSharp.Tests
             var result = await client.IsPhoneRegisteredAsync(NumberToAuthenticate);
             Assert.IsTrue(result);
         }
+
         public virtual async Task FloodExceptionShouldNotCauseCannotReadPackageLengthError()
         {
             for (int i = 0; i < 50; i++)
@@ -338,5 +339,42 @@ namespace TLSharp.Tests
                 }
             }
         }
+
+        public virtual async Task SendMessageByUserNameTest()
+        {
+            UserNameToSendMessage = ConfigurationManager.AppSettings[nameof(UserNameToSendMessage)];
+            if (string.IsNullOrWhiteSpace(UserNameToSendMessage))
+                throw new Exception($"Please fill the '{nameof(UserNameToSendMessage)}' setting in app.config file first");
+
+            var client = NewClient();
+
+            await client.ConnectAsync();
+
+            var result = await client.SearchUserAsync(UserNameToSendMessage);
+
+            var user = result.users.lists
+                .Where(x => x.GetType() == typeof(TLUser))
+                .OfType<TLUser>()
+                .FirstOrDefault(x => x.username == UserNameToSendMessage.TrimStart('@'));
+
+            if (user == null)
+            {
+                var contacts = await client.GetContactsAsync();
+
+                user = contacts.users.lists
+                    .Where(x => x.GetType() == typeof(TLUser))
+                    .OfType<TLUser>()
+                    .FirstOrDefault(x => x.username == UserNameToSendMessage.TrimStart('@'));
+            }
+
+            if (user == null)
+            {
+                throw new System.Exception("Username was not found: " + UserNameToSendMessage);
+            }
+
+            await client.SendTypingAsync(new TLInputPeerUser() { user_id = user.id });
+            Thread.Sleep(3000);
+            await client.SendMessageAsync(new TLInputPeerUser() { user_id = user.id }, "TEST");
+        }
     }
 }