Added Whatsapp convenience function (phone cleanup) + tests

Author: codebude

QRCoder/PayloadGenerator.cs

@@ -354,7 +354,8 @@ public WhatsAppMessage(string message)
 
             public override string ToString()
             {
-                return ($"https://wa.me/{this.number}?text={Uri.EscapeDataString(message)}");
+                var cleanedPhone = Regex.Replace(this.number, @"^[0+]+|[ ()-]", string.Empty);
+                return ($"https://wa.me/{cleanedPhone}?text={Uri.EscapeDataString(message)}");
             }
         }
 

QRCoderTests/PayloadGeneratorTests.cs

@@ -2923,13 +2923,13 @@ public void contactdata_generator_can_generate_payload_full_vcard4_reverse()
         [Category("PayloadGenerator/WhatsAppMessage")]
         public void whatsapp_generator_can_generate_payload_simple()
         {
-            var number = "01601234567";
+            var number = "491601234567";
             var msg = "This is a sample message with Umlauts: Ä,ö, ü and ß.";
             var generator = new PayloadGenerator.WhatsAppMessage(number, msg);
 
             generator
                 .ToString()
-                .ShouldBe("whatsapp://send?phone=01601234567&text=This%20is%20a%20sample%20message%20with%20Umlauts%3A%20%C3%84%2C%C3%B6%2C%20%C3%BC%20and%20%C3%9F.");
+                .ShouldBe("https://wa.me/491601234567?text=This%20is%20a%20sample%20message%20with%20Umlauts%3A%20%C3%84%2C%C3%B6%2C%20%C3%BC%20and%20%C3%9F.");
         }
 
         [Fact]
@@ -2941,7 +2941,7 @@ public void whatsapp_should_add_unused_params()
 
             generator
                 .ToString()
-                .ShouldBe("whatsapp://send?phone=&text=This%20is%20a%20sample%20message%20with%20Umlauts%3A%20%C3%84%2C%C3%B6%2C%20%C3%BC%20and%20%C3%9F.");
+                .ShouldBe("https://wa.me/?text=This%20is%20a%20sample%20message%20with%20Umlauts%3A%20%C3%84%2C%C3%B6%2C%20%C3%BC%20and%20%C3%9F.");
         }
 
         [Fact]