MattrixwvReactComponents/lib/component/loading/block/PulsingBlocks.tsx

import type { LoadingBlocksProps } from "$/types/LoadingTypes";
import { usePrefersReducedMotion } from "$/util/AccessibilityUtil";
import { useId } from "react";


export default function PulsingBlocks({
	size,
	width,
	height,
	className,
	animationDuration = 600,
	color,
	stroke,
	fill,
	ariaLabel = "Loading"
}: Readonly<LoadingBlocksProps>){
	//https://github.com/n3r4zzurr0/svg-spinners/blob/main/svg-smil/blocks-scale.svg
	const id = useId();
	const reducedMotion = usePrefersReducedMotion();
	const dur = reducedMotion ? animationDuration / 100 : animationDuration / 1000;


	return (
		<svg
			width={size ?? width}
			height={size ?? height}
			role="status"
			aria-live="polite"
			aria-label={ariaLabel}
			viewBox="0 0 24 24"
			xmlns="http://www.w3.org/2000/svg"
		>
			<rect
				x="1.5"
				y="1.5"
				rx="1"
				width="9"
				height="9"
				className={className}
				stroke={color ?? stroke}
				fill={color ?? fill}
			>
				<animate
					id={`rectangle1_${id}`}
					begin={`0;rectangle4_${id}.end+${dur / 4}s`}
					attributeName="x"
					dur={dur}
					values="1.5;.5;1.5"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`0;rectangle4_${id}.end+${dur / 4}s`}
					attributeName="y"
					dur={dur}
					values="1.5;.5;1.5"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`0;rectangle4_${id}.end+${dur / 4}s`}
					attributeName="width"
					dur={dur}
					values="9;11;9"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`0;rectangle4_${id}.end+${dur / 4}s`}
					attributeName="height"
					dur={dur}
					values="9;11;9"
					keyTimes="0;.2;1"
				/>
			</rect>
			<rect
				x="13.5"
				y="1.5"
				rx="1"
				width="9"
				height="9"
				className={className}
				stroke={color ?? stroke}
				fill={color ?? fill}
			>
				<animate
					begin={`rectangle1_${id}.begin+${dur / 4}s`}
					attributeName="x"
					dur={dur}
					values="13.5;12.5;13.5"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur / 4}s`}
					attributeName="y"
					dur={dur}
					values="1.5;.5;1.5"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur / 4}s`}
					attributeName="width"
					dur={dur}
					values="9;11;9"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur / 4}s`}
					attributeName="height"
					dur={dur}
					values="9;11;9"
					keyTimes="0;.2;1"
				/>
			</rect>
			<rect
				x="13.5"
				y="13.5"
				rx="1"
				width="9"
				height="9"
				className={className}
				stroke={color ?? stroke}
				fill={color ?? fill}
			>
				<animate
					begin={`rectangle1_${id}.begin+${dur / 2}s`}
					attributeName="x"
					dur={dur}
					values="13.5;12.5;13.5"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur / 2}s`}
					attributeName="y"
					dur={dur}
					values="13.5;12.5;13.5"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur / 2}s`}
					attributeName="width"
					dur={dur}
					values="9;11;9"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur / 2}s`}
					attributeName="height"
					dur={dur}
					values="9;11;9"
					keyTimes="0;.2;1"
				/>
			</rect>
			<rect
				x="1.5"
				y="13.5"
				rx="1"
				width="9"
				height="9"
				className={className}
				stroke={color ?? stroke}
				fill={color ?? fill}
			>
				<animate
					id={`rectangle4_${id}`}
					begin={`rectangle1_${id}.begin+${dur * 3 / 4}s`}
					attributeName="x"
					dur={dur}
					values="1.5;.5;1.5"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur * 3 / 4}s`}
					attributeName="y"
					dur={dur}
					values="13.5;12.5;13.5"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur * 3 / 4}s`}
					attributeName="width"
					dur={dur}
					values="9;11;9"
					keyTimes="0;.2;1"
				/>
				<animate
					begin={`rectangle1_${id}.begin+${dur * 3 / 4}s`}
					attributeName="height"
					dur={dur}
					values="9;11;9"
					keyTimes="0;.2;1"
				/>
			</rect>
		</svg>
	);
}