feat: implement UserAvatar component with dynamic color assignment and memoization

apps/infoalloggi/src/components/user_avatar.tsx

@@ -1,6 +1,7 @@
+import React from "react";
+import { isColorDark } from "~/lib/color";
 import { cn, getHexColorFromString, getInitials } from "~/lib/utils";
 import type { UsersId } from "~/schemas/public/Users";
-import { Facehash, type FacehashProps } from "./facehash/facehash";
 
 const colorOptions = new Map<string, string>();
 
@@ -39,7 +40,8 @@ export const UserAvatarOld = ({
 	);
 };
 */
-export const UserAvatar = (
+/*
+export const UserAvatar2 = (
 	props: {
 		userId: UsersId;
 		username?: string;
@@ -59,7 +61,17 @@ export const UserAvatar = (
 		<Facehash
 			{...rest}
 			className={cn("size-20 rounded-full", rest.className)}
-			colors={[
+			colors={user_colors}
+			initialsCount={2}
+			intensity3d="none"
+			name={value}
+			showInitial={username !== undefined}
+			variant="solid"
+		/>
+	);
+};
+*/
+const user_colors = [
 	"#2D3436",
 	"#535C68",
 	"#636E72",
@@ -84,12 +96,54 @@ export const UserAvatar = (
 	"#A29BFE",
 	"#A55EEA",
 	"#6D214F",
-			]}
-			initialsCount={2}
-			intensity3d="none"
-			name={value}
-			showInitial={username !== undefined}
-			variant="solid"
-		/>
+];
+
+function stringHash(str: string): number {
+	let hash = 0;
+	for (let i = 0; i < str.length; i++) {
+		const char = str.charCodeAt(i);
+		hash = (hash << 5) - hash + char;
+		hash &= hash; // Convert to 32bit integer
+	}
+	return Math.abs(hash);
+}
+
+export const UserAvatar = (
+	props: {
+		userId: UsersId;
+		username?: string;
+	} & React.HTMLAttributes<HTMLDivElement>,
+) => {
+	const { userId, username, className, ...rest } = props;
+	const value = `${username && getInitials(username)}${userId}`;
+
+	const colorIndex = React.useMemo(() => {
+		const hash = stringHash(value);
+		const colorsLength = user_colors.length ?? 1;
+		const _colorIndex = hash % colorsLength;
+
+		return _colorIndex;
+	}, [value]);
+	const userColor = user_colors[colorIndex];
+	return (
+		<div
+			{...rest}
+			className={cn(
+				"@container flex size-20 items-center justify-center rounded-full",
+				className,
+			)}
+			style={{
+				backgroundColor: userColor,
+				color: userColor
+					? isColorDark(userColor, 180)
+						? "#FFFFFF"
+						: "#oklch(0.24 0 0)"
+					: "#oklch(0.24 0 0)",
+			}}
+		>
+			<span className="text-[40cqw] tracking-wide">
+				{username && getInitials(username)}
+			</span>
+		</div>
 	);
 };