Added: first and last environment path

Models/TileModel.cs

@@ -20,11 +20,81 @@ namespace AppLauncher.Models
 
         public override string ToString() => this.Title ?? string.Empty;
 
-        public string CleanProcessFilename => (string.IsNullOrWhiteSpace(this.ProcessFilename) ? string.Empty : Environment.ExpandEnvironmentVariables(this.ProcessFilename));
+        public string CleanProcessFilename => (string.IsNullOrWhiteSpace(this.ProcessFilename) ? string.Empty : resolvePath(this.ProcessFilename));
 
-        public string CleanProcessArgument => (string.IsNullOrWhiteSpace(this.ProcessArgument) ? string.Empty : Environment.ExpandEnvironmentVariables(this.ProcessArgument));
+        public string CleanProcessArgument => (string.IsNullOrWhiteSpace(this.ProcessArgument) ? string.Empty : resolvePath(this.ProcessArgument));
 
-        public string CleanProcessWorkingDirectory => (string.IsNullOrWhiteSpace(this.ProcessWorkingDirectory) ? string.Empty : Environment.ExpandEnvironmentVariables(this.ProcessWorkingDirectory));
+        public string CleanProcessWorkingDirectory => (string.IsNullOrWhiteSpace(this.ProcessWorkingDirectory) ? string.Empty : resolvePath(this.ProcessWorkingDirectory));
+
+        protected string resolvePath(string value)
+        {
+            string rv = Environment.ExpandEnvironmentVariables(value);
+
+            rv = resolveFirstPath(rv);
+            rv = resolveLastPath(rv);
+
+            return rv;
+        }
+
+        protected string resolveFirstPath(string value)
+        {
+            const string last = "%FIRST%";
+            if (!value.Contains(last))
+            {
+                return value;
+            }
+
+            string head = value.Substring(0, value.IndexOf(last));
+            string tail = value.Substring(value.IndexOf(last) + last.Length);
+
+            string[] dirList = new string[0];
+
+            try
+            {
+                dirList = System.IO.Directory.GetDirectories(head, "*", System.IO.SearchOption.TopDirectoryOnly);
+            }
+            catch
+            {
+                // do nothing
+            }
+
+            if (dirList.Length <= 0)
+            {
+                return value;
+            }
+
+            return dirList[0] + tail;
+        }
+
+        protected string resolveLastPath(string value)
+        {
+            const string last = "%LAST%";
+            if (!value.Contains(last))
+            {
+                return value;
+            }
+
+            string head = value.Substring(0, value.IndexOf(last));
+            string tail = value.Substring(value.IndexOf(last) + last.Length);
+
+            string[] dirList = new string[0];
+
+            try
+            {
+                dirList = System.IO.Directory.GetDirectories(head, "*", System.IO.SearchOption.TopDirectoryOnly);
+            }
+            catch
+            {
+                // do nothing
+            }
+
+            if (dirList.Length <= 0)
+            {
+                return value;
+            }
+
+            return dirList[(dirList.Length - 1)] + tail;
+        }
 
     }
 }