Added IDescribable to Pattern and implemented it

Author: Vogel612

Rubberduck.RegexAssistant/Pattern.cs

@@ -1,18 +1,24 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using Rubberduck.RegexAssistant.i18n;
+using System;
 
 namespace Rubberduck.RegexAssistant
 {
-    class Pattern
+    public class Pattern : IDescribable
     {
         IRegularExpression RootExpression;
         MatcherFlags Flags;
 
         private readonly bool _hasStartAnchor;
         private readonly bool _hasEndAnchor;
+        private readonly string _description;
+
+        public string Description
+        {
+            get
+            {
+                return _description;
+            }
+        }
 
         public Pattern(string expression, bool ignoreCase, bool global)
         {
@@ -25,8 +31,23 @@ public Pattern(string expression, bool ignoreCase, bool global)
             int start = _hasStartAnchor ? 1 : 0;
             int end = (_hasEndAnchor ? 1 : 0) + start + 1;
             RootExpression = RegularExpression.Parse(expression.Substring(start, expression.Length - end));
+            _description = AssembleDescription();
         }
 
+        private string AssembleDescription()
+        {
+            string result = string.Empty;
+            if (_hasStartAnchor)
+            {
+                result += Flags.HasFlag(MatcherFlags.Global) ? AssistantResources.PatternDescription_AnchorStart_GlobalEnabled : AssistantResources.PatternDescription_AnchorStart;
+            }
+            result += RootExpression.Description;
+            if (_hasEndAnchor)
+            {
+                result += Flags.HasFlag(MatcherFlags.Global) ? AssistantResources.PatternDescription_AnchorEnd_GlobalEnabled : AssistantResources.PatternDescription_AnchorEnd;
+            }
+            return result;
+        }
     }
 
     [Flags]

Rubberduck.RegexAssistant/i18n/AssistantResources.Designer.cs

@@ -189,6 +189,18 @@
   <data name="ExpressionDescription_AlternativesExpression" xml:space="preserve">
     <value>Matches one of the following alternatives {0}.</value>
   </data>
+  <data name="PatternDescription_AnchorEnd" xml:space="preserve">
+    <value>$ ensures all characters of the string are consumed</value>
+  </data>
+  <data name="PatternDescription_AnchorEnd_GlobalEnabled" xml:space="preserve">
+    <value>$ ensures that the line ended or all characters of the input have been consumed</value>
+  </data>
+  <data name="PatternDescription_AnchorStart" xml:space="preserve">
+    <value>^ ensures we are at the beginning of the string that's to be matched</value>
+  </data>
+  <data name="PatternDescription_AnchorStart_GlobalEnabled" xml:space="preserve">
+    <value>^ ensures that the matcher starts at the beginning of a line</value>
+  </data>
   <data name="Quantifer_Plus" xml:space="preserve">
     <value>at least once</value>
   </data>