refactor: ♻️ 2.0 (#3)

src/backend/NSExt/Extensions/StreamExtensions.cs

@@ -0,0 +1,32 @@
+namespace NSExt.Extensions;
+
+/// <summary>
+///     StreamExtensions
+/// </summary>
+public static class StreamExtensions
+{
+    /// <summary>
+    ///     FirstByteIndex
+    /// </summary>
+    public static long FirstByteIndex(this Stream me, byte[] findBytes)
+    {
+        int data;
+        while ((data = me.ReadByte()) != -1) {
+            if (findBytes.Contains((byte)data)) {
+                return me.Position;
+            }
+        }
+
+        return -1;
+    }
+
+    /// <summary>
+    ///     IsTextStream
+    /// </summary>
+    public static bool IsTextStream(this Stream me)
+    {
+        #pragma warning disable IDE0300
+        return me.FirstByteIndex(new byte[] { 0x00, 0xff }) < 0;
+        #pragma warning restore IDE0300
+    }
+}