switch create-zip task to class type to simplify encapsulation

build/smapi.targets

@@ -1,6 +1,6 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <!--*********************************************
-  ** Define build tasks used below
+  ** Define build tasks
   **********************************************-->
   <!--######
   ## create a release zip file for a mod (CodeTaskFactory only available on Windows?)
@@ -15,11 +15,37 @@
       <Reference Include="System.IO" />
       <Reference Include="System.IO.Compression" />
       <Reference Include="System.Web.Extensions"/>
-      <Using Namespace="System.IO" />
+      <Code Type="Class" Language="cs">
-      <Using Namespace="System.IO.Compression" />
-      <Using Namespace="System.Web.Script.Serialization"/>
-      <Code Type="Fragment" Language="cs">
         <![CDATA[
+        using System;
+        using System.Collections.Generic;
+        using System.IO;
+        using System.IO.Compression;
+        using System.Web.Script.Serialization;
+        using Microsoft.Build.Framework;
+        using Microsoft.Build.Utilities;
+
+        /// <summary>A build task which packs mod files into a conventional release zip.</summary>
+        public class CreateModReleaseZip : Task, ITask
+        {
+           /*********
+           ** Accessors
+           *********/
+           /// <summary>The mod files to pack.</summary>
+           public ITaskItem[] Files { get; set; }
+
+           /// <summary>The name of the mod.</param>
+           public string ModName { get; set; }
+
+           /// <summary>The absolute or relative path to the folder which should contain the generated zip file.</summary>
+           public string OutputFolderPath { get; set; }
+
+
+           /*********
+           ** Public methods
+           *********/
+           public override bool Execute()
+           {
               try
               {
                  // create output path if needed
@@ -79,6 +105,8 @@
                  Log.LogErrorFromException(ex);
                  return false;
               }
+           }
+        }
         ]]>
       </Code>
     </Task>