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import * as React from "react";
import { View } from "react-native";
import { Image } from "expo-image";
import { Text } from "@/components/ui/Text";
import { useAssetUrl } from "@/lib/hooks";
import { cn } from "@/lib/utils";
interface AvatarProps {
image?: string | null;
name?: string | null;
size?: number;
className?: string;
fallbackClassName?: string;
}
const AVATAR_COLORS = [
"#f87171", // red-400
"#fb923c", // orange-400
"#fbbf24", // amber-400
"#a3e635", // lime-400
"#34d399", // emerald-400
"#22d3ee", // cyan-400
"#60a5fa", // blue-400
"#818cf8", // indigo-400
"#a78bfa", // violet-400
"#e879f9", // fuchsia-400
];
function nameToColor(name: string | null | undefined): string {
if (!name) return AVATAR_COLORS[0];
let hash = 0;
for (let i = 0; i < name.length; i++) {
hash = name.charCodeAt(i) + ((hash << 5) - hash);
}
return AVATAR_COLORS[Math.abs(hash) % AVATAR_COLORS.length];
}
function isExternalUrl(url: string) {
return url.startsWith("http://") || url.startsWith("https://");
}
export function Avatar({
image,
name,
size = 40,
className,
fallbackClassName,
}: AvatarProps) {
const [imageError, setImageError] = React.useState(false);
const assetUrl = useAssetUrl(image ?? "");
const imageUrl = React.useMemo(() => {
if (!image) return null;
return isExternalUrl(image)
? {
uri: image,
}
: assetUrl;
}, [image]);
React.useEffect(() => {
setImageError(false);
}, [image]);
const initials = React.useMemo(() => {
if (!name) return "U";
return name.charAt(0).toUpperCase();
}, [name]);
const showFallback = !imageUrl || imageError;
const avatarColor = nameToColor(name);
return (
<View
className={cn("overflow-hidden", className)}
style={{
width: size,
height: size,
borderRadius: size / 2,
backgroundColor: showFallback ? avatarColor : undefined,
}}
>
{showFallback ? (
<View
className={cn(
"flex h-full w-full items-center justify-center",
fallbackClassName,
)}
style={{ backgroundColor: avatarColor }}
>
<Text
className="text-white"
style={{
fontSize: size * 0.4,
lineHeight: size * 0.4,
textAlign: "center",
}}
>
{initials}
</Text>
</View>
) : (
<Image
source={imageUrl}
style={{ width: "100%", height: "100%" }}
contentFit="cover"
onError={() => setImageError(true)}
/>
)}
</View>
);
}
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