Architecture refactor (#63)

DiscordChatExporter.Core/Internal/Extensions.cs

@@ -1,22 +1,23 @@
-using System.IO;
-using System.Reflection;
-using System.Resources;
+using System;
+using System.Drawing;
+using Tyrrrz.Extensions;
 
 namespace DiscordChatExporter.Core.Internal
 {
     internal static class Extensions
     {
-        public static string GetManifestResourceString(this Assembly assembly, string resourceName)
+        public static string ToSnowflake(this DateTime dateTime)
         {
-            var stream = assembly.GetManifestResourceStream(resourceName);
-            if (stream == null)
-                throw new MissingManifestResourceException($"Could not find resource [{resourceName}].");
-
-            using (stream)
-            using (var reader = new StreamReader(stream))
-            {
-                return reader.ReadToEnd();
-            }
+            const long epoch = 62135596800000;
+            var unixTime = dateTime.ToUniversalTime().Ticks / TimeSpan.TicksPerMillisecond - epoch;
+            var value = ((ulong) unixTime - 1420070400000UL) << 22;
+            return value.ToString();
         }
+
+        public static string Base64Encode(this string str) => str.GetBytes().ToBase64();
+
+        public static string Base64Decode(this string str) => str.FromBase64().GetString();
+
+        public static Color ResetAlpha(this Color color) => Color.FromArgb(1, color);
     }
 }