EncodedArg

Dalamud.Bootstrap/SqexArg/ArgumentContainer.cs

@@ -0,0 +1,40 @@
+using System;
+
+namespace Dalamud.Bootstrap.SqexArg
+{
+    internal sealed class ArgumentContainer
+    {
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="argument"></param>
+        /// <param name="container"></param>
+        /// <returns></returns>
+        public static bool Parse(string argument, out ArgumentContainer? container)
+        {
+            if (argument.Length < 17)
+            {
+                // does not contain: //**sqex003 + payload + checksum + **//
+                container = null;
+                return false;
+            }
+
+            if (!argument.StartsWith("//**sqex003") || !argument.EndsWith("**//"))
+            {
+                container = null;
+                return false;
+            }
+
+            var checksum = argument[^5];
+            var payload = argument[11..^5]
+                .Replace(; // encoded in url-safe variant of base64
+
+            // decode 
+
+            Convert.FromBase64String();
+            container = new ArgumentContainer(payload, checksum);
+
+            return true;
+        }
+    }
+}