Added MemoryCache class and implemented principal/ACL cache in the security service

1 files changed, 33 insertions, 0 deletions

diff --git a/Util/Extensions.cs b/Util/Extensions.cs
new file mode 100644
index 0000000..bbf9a12
--- /dev/null
+++ b/Util/Extensions.cs
@@ -0,0 +1,33 @@
+namespace HyperBooru.Util;
+
+public static class Extensions {
+    public static readonly string[] MagnitudeOrders = new[] {
+        "K", "M", "G", "T", "P", "E", "Z", "Y", "R", "Q"
+    };
+
+    public static DateTime? TryParseDateTimeUtc(this string s) {
+        bool success = DateTime.TryParse(s, out var dateTime);
+        return success ? DateTime.SpecifyKind(dateTime, DateTimeKind.Utc) : null;
+    }
+
+    public static string ToBytesSI(this long x) {
+        var exp = (int) Math.Log10(x);
+        var suffix = MagnitudeOrders.ElementAtOrDefault(exp / 3 - 1);
+        if(suffix is null)
+            return x.ToString();
+        double n = x / Math.Pow(10, exp / 3 * 3);
+        return $"{Math.Round(n, 2 - (exp % 3))} {suffix}B";
+    }
+
+    public static string ToStringHumanReadable(this TimeSpan t) {
+        if(t.TotalMilliseconds < 1000)
+            return string.Format("{0:0}ms", t.TotalMilliseconds);
+        if(t.TotalSeconds < 60)
+            return string.Format("{0:0.00}s", t.TotalSeconds);
+        if(t.TotalMinutes < 60)
+            return string.Format("{0:0}m{0:0}s", t.TotalMinutes, t.Seconds);
+        if(t.TotalHours < 24)
+            return string.Format("{0:0}h{0:0}m", t.TotalHours, t.Minutes);
+        return string.Format("{0:0.00}d", t.TotalDays);
+    }
+}