[KOE-150] Added escaping of special characters in signature names

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/Signatures/FeatureSignatures.cs

@@ -270,9 +270,9 @@ namespace Acacia.Features.Signatures
                     if (gab != null)    
                         ReplacePlaceholders(gab, name);
                 }
-            }
 
-            return name;
+                return signature.Name;
+            }
         }
 
         private string GetSignatureName(ISignatures signatures, ZPushAccount account, string name)

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Stubs/ISignature.cs

@@ -18,5 +18,7 @@ namespace Acacia.Stubs
         void SetContent(string content, ISignatureFormat format);
         void SetContentTemplate(string content, ISignatureFormat format);
         string GetContentTemplate(ISignatureFormat format);
+
+        string Name { get; }
     }
 }

src/AcaciaZPushPlugin/AcaciaZPushPlugin/Stubs/OutlookWrappers/SignatureWrapper.cs

@@ -32,6 +32,11 @@ namespace Acacia.Stubs.OutlookWrappers
             this._name = name;
         }
 
+        public string Name
+        {
+            get { return EscapeSignatureName(_name); }
+        }
+
         protected override void DoRelease()
         {
         }
@@ -50,7 +55,15 @@ namespace Acacia.Stubs.OutlookWrappers
 
         private static string GetPath(string name, string suffix)
         {
-            return Path.Combine(BasePath, name) + "." + suffix;
+            return Path.Combine(BasePath, EscapeSignatureName(name)) + "." + suffix;
+        }
+
+        private static string EscapeSignatureName(string name)
+        {
+            string invalidChars = System.Text.RegularExpressions.Regex.Escape(new string(Path.GetInvalidFileNameChars()));
+            string invalidRegStr = string.Format(@"([{0}]*\.+$)|([{0}]+)", invalidChars);
+
+            return System.Text.RegularExpressions.Regex.Replace(name, invalidRegStr, "_");
         }
 
         public void Delete()