Identicons

.gitignore

@@ -1,3 +1,4 @@
+ArcaneLibs.UsageTest/identicons/ 
 ## Ignore Visual Studio temporary files, build results, and
 ## files generated by popular Visual Studio add-ons.
 ##

ArcaneLibs.UsageTest/Program.cs

@@ -1,5 +1,6 @@
 // See https://aka.ms/new-console-template for more information
 
+using System.Diagnostics;
 using System.Drawing;
 using ArcaneLibs;
 using ArcaneLibs.Collections;
@@ -48,23 +49,72 @@
 Console.WriteLine(Util.GetCommandOutputSync("bash", "-c asdf"));
 Console.WriteLine(Util.GetCommandOutputSync("bash", "-c ls"));
 
-var arc = new RandomClass {
-    Id = 1,
-    Name = "asdf",
-    DateCreated = DateTime.Now,
-    SubClassInst = new RandomClass.SubClass {
-        Description = "asdf"
-    }
-};
-var brc = new RandomClass {
-    Id = 2,
-    Name = "asdf",
-    DateCreated = DateTime.Now,
-    SubClassInst = new RandomClass.SubClass {
-        Description = "asdf"
-    }
-};
+// var arc = new RandomClass {
+//     Id = 1,
+//     Name = "asdf",
+//     DateCreated = DateTime.Now,
+//     SubClassInst = new RandomClass.SubClass {
+//         Description = "asdf"
+//     }
+// };
+// var brc = new RandomClass {
+//     Id = 2,
+//     Name = "asdf",
+//     DateCreated = DateTime.Now,
+//     SubClassInst = new RandomClass.SubClass {
+//         Description = "asdf"
+//     }
+// };
+//
+// var differences = arc.FindDifferencesDeep(brc);
+// Console.WriteLine(differences.left.ToJson());
+// Console.WriteLine(differences.right.ToJson());
 
-var differences = arc.FindDifferencesDeep(brc);
-Console.WriteLine(differences.left.ToJson());
-Console.WriteLine(differences.right.ToJson());
+// identicon test
+Directory.CreateDirectory("identicons");
+
+// for (int i = 0; i < 100; i++) {
+//     var ident = new SvgIdenticonGenerator();
+//     var sw = Stopwatch.StartNew();
+//     var count = 0;
+//     while (sw.ElapsedMilliseconds < 10) {
+//         count++;
+//         var hash = Guid.NewGuid().ToString("N");
+//         var svg = ident.Generate(hash);
+//         // File.WriteAllText($"identicons/{hash}.svg", svg);
+//     }
+//
+//     Console.WriteLine($"Generated {count} identicons in {sw.Elapsed}");
+//     await Task.Delay(1000);
+// }
+
+// ident.Generate("asdf");
+
+List<string> values = [
+    "Zoey",
+    "Willow",
+    "Whiskers",
+    "Zoe",
+    "Sam",
+    "Salem",
+    "Snickers",
+    "Snowball",
+    "Angel",
+    "Simon",
+    "Charlie",
+    "Daisy",
+    "Sasha",
+    "Samantha",
+    "Sammy",
+    "Dusty",
+    "Sassy",
+    "Annie",
+    "Felix",
+    "Pepper"
+];
+
+var ident2 = new SvgIdenticonGenerator();
+foreach (var value in values) {
+    var svg = ident2.Generate(value);
+    File.WriteAllText($"identicons/{values.IndexOf(value)} - {value}.svg", svg);
+}

ArcaneLibs/Extensions/StringExtensions.cs

@@ -1,6 +1,7 @@
 using System.Diagnostics.CodeAnalysis;
 using System.Text;
 using System.Text.RegularExpressions;
+using System.Web;
 
 namespace ArcaneLibs.Extensions;
 
@@ -69,4 +70,7 @@ public static string[] ParseArguments(this string text) =>
             .SelectMany(element => element).ToArray();
 
     public static IEnumerable<byte> AsBytes(this string str) => Encoding.UTF8.GetBytes(str);
+
+    public static string UrlEncode(this string str) => HttpUtility.UrlEncode(str);
+    public static string UrlDecode(this string str) => HttpUtility.UrlDecode(str);
 }

ArcaneLibs/SvgIdenticonGenerator.cs

@@ -0,0 +1,51 @@
+using System.Security.Cryptography;
+using ArcaneLibs.Extensions;
+
+namespace ArcaneLibs;
+
+public class SvgIdenticonGenerator {
+    // based on https://github.com/stewartlord/identicon.js/blob/master/identicon.js
+
+    public string BackgroundColor { get; set; } = "#FEFEFEFF";
+    public float Saturation { get; set; } = 0.7f;
+    public float Brightness { get; set; } = 0.5f;
+    public string? ForegroundColor { get; set; }
+
+
+    public string Generate(string identity) {
+        var hash = SHA1.HashData(identity.AsBytes().ToArray());
+
+
+        var hashArray = new byte[hash.Length];
+        for (var i = 0; i < hash.Length; i++) {
+            hashArray[i] = hash[i];
+        }
+
+        var hashInt = BitConverter.ToInt32(hashArray, 0);
+        var hashIntAbs = Math.Abs(hashInt);
+        var color = ForegroundColor ?? $"#{(hashIntAbs % 0xFFFFFF):X6}";
+
+        var svg = "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"5\" height=\"5\" viewBox=\"0 0 5 5\">";
+        svg += $"<rect x=\"0\" y=\"0\" width=\"5\" height=\"5\" fill=\"{BackgroundColor}\" />";
+        for (var i = 0; i < 25; i++) {
+            if ((hashIntAbs & (1 << i)) != 0) {
+                var x = i % 3; // Only use the first 3 columns
+                var y = (int)Math.Floor(i / 5f);
+                svg += $"<rect x=\"{x}\" y=\"{y}\" width=\"1\" height=\"1\" fill=\"{color}\" />";
+                svg += $"<rect x=\"{4 - x}\" y=\"{y}\" width=\"1\" height=\"1\" fill=\"{color}\" />"; // Mirror the square to the other half
+            }
+        }
+
+        svg += "</svg>";
+        return svg;
+    }
+
+    public string GenerateAsBase64(string identity) {
+        return Convert.ToBase64String(Generate(identity).AsBytes().ToArray());
+    }
+
+    public string GenerateAsDataUri(string identity) {
+        return $"data:image/svg+xml;base64,{GenerateAsBase64(identity)}";
+    }
+
+}