git » sdk » commit 4f7eae9

diff --git a/xmpp/ChatMessage.hx b/xmpp/ChatMessage.hx
index 3764c58..46d0b71 100644
--- a/xmpp/ChatMessage.hx
+++ b/xmpp/ChatMessage.hx
@@ -4,6 +4,7 @@ import haxe.Exception;
 using Lambda;
 
 import xmpp.JID;
+import xmpp.Identicon;
 
 enum MessageDirection {
 	MessageReceived;
@@ -216,6 +217,10 @@ class ChatMessage {
 		return direction == MessageReceived;
 	}
 
+	public function threadIcon() {
+		return threadId == null ? null : Identicon.svg(threadId);
+	}
+
 	public function asStanza(?type: String):Stanza {
 		var attrs: haxe.DynamicAccess<String> = { type: type ?? "chat" };
 		if (from != null) attrs.set("from", from.asString());
diff --git a/xmpp/Identicon.hx b/xmpp/Identicon.hx
new file mode 100644
index 0000000..df596bf
--- /dev/null
+++ b/xmpp/Identicon.hx
@@ -0,0 +1,31 @@
+package xmpp;
+
+import xmpp.Color;
+import haxe.crypto.Sha1;
+import haxe.io.Bytes;
+import haxe.io.BytesInput;
+
+@:expose
+class Identicon {
+	public static function svg(source: String) {
+		final sha = Sha1.make(Bytes.ofString(source));
+		final input = new BytesInput(sha);
+		input.bigEndian = true;
+		final hash = input.readInt32();
+		var uri = 'data:image/svg+xml,<svg%20xmlns="http://www.w3.org/2000/svg"%20version="1.1"%20width="5"%20height="5"%20viewBox="0%200%205%205">';
+		uri += "<style>rect{fill:%23" + Color.forString(source).substr(1) + ";}</style>";
+		var i = 0;
+		for (x in 0...3) {
+			for (y in 0...5) {
+				final value = hash >> (i++);
+				if (value % 2 == 0) {
+					uri += "<rect%20width=\"1\"%20height=\"1\"%20x=\"" + x + "\"%20y=\"" + y + "\"/>";
+					if (x != 2) {
+						uri += "<rect%20width=\"1\"%20height=\"1\"%20x=\"" + (4 - x) + "\"%20y=\"" + y + "\"/>";
+					}
+				}
+			}
+		}
+		return uri + "</svg>";
+	}
+}