Weighing: Fix scale L320 for Baden

Elwig/App.xaml.cs

@@ -183,6 +183,9 @@ namespace Elwig {
         }
 
         private async void Application_Exit(object sender, ExitEventArgs evt) {
+            foreach (var s in EventScales) {
+                s.Dispose();
+            }
             await Pdf.Cleanup();
         }
 

Elwig/Helpers/Extensions.cs

@@ -23,7 +23,7 @@ namespace Elwig.Helpers {
         }
 
         public static string? ReadUntil(this StreamReader reader, char delimiter) {
-            return ReadUntil(reader, new char[] { delimiter });
+            return ReadUntil(reader, [ delimiter ]);
         }
 
         public static string? ReadUntil(this StreamReader reader, char[] delimiter) {
@@ -45,7 +45,7 @@ namespace Elwig.Helpers {
         }
 
         public static Task<string?> ReadUntilAsync(this StreamReader reader, char delimiter) {
-            return ReadUntilAsync(reader, new char[] { delimiter });
+            return ReadUntilAsync(reader, [ delimiter ]);
         }
 
         public static async Task<string?> ReadUntilAsync(this StreamReader reader, char[] delimiter) {

Elwig/Helpers/Weighing/AveryEventScale.cs

@@ -58,11 +58,19 @@ namespace Elwig.Helpers.Weighing {
         }
 
         protected async Task<WeighingResult?> Receive() {
-            var line = await Reader.ReadUntilAsync("\r\n");
+            var line = "";
+            while (line.Length < 33) {
+                var ch = Reader.Read();
+                if (ch == -1) {
+                    return null;
+                } else if (line.Length > 0 || ch == ' ') {
+                    line += char.ToString((char)ch);
+                }
+            }
             if (LogPath != null) await File.AppendAllTextAsync(LogPath, line);
             if (line == null || line == "") {
                 return null;
-            } else if (line.Length != 35 || line[0] != ' ' || line[9] != ' ' || line[15] != ' ' || line[20] != ' ' || line[32] != ' ') {
+            } else if (line.Length != 33 || line[0] != ' ' || line[9] != ' ' || line[15] != ' ' || line[20] != ' ' || line[32] != ' ') {
                 throw new IOException($"Invalid event from scale: '{line}'");
             }
 

Tests/WeighingTests/ScaleHandlers.cs

@@ -171,11 +171,11 @@ namespace Tests.WeighingTests {
             Thread.Sleep(100);
 
             if (invalid) {
-                return ("abcd\r\n", false);
+                return ("abcd", false);
             }
 
             bool incr = true;
-            return ($" {new DateTime(2020, 9, 28, 9, 8, 0):dd.MM.yy HH:mm} {identNr,4} {weight,9}{(unit ? "lb" : "kg")} \r\n", incr);
+            return ($" {new DateTime(2020, 9, 28, 9, 8, 0):dd.MM.yy HH:mm} {identNr,4} {weight,9}{(unit ? "lb" : "kg")} ", incr);
         }
     }
 }