32 lines
1.0 KiB
JavaScript
32 lines
1.0 KiB
JavaScript
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import * as React from 'react';
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const AUTO_INTERVAL = 200;
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const STEP_BUCKETS = [[30, 0.05], [70, 0.03], [96, 0.01]];
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export default function usePercent(spinning, percent) {
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const [mockPercent, setMockPercent] = React.useState(0);
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const mockIntervalRef = React.useRef(null);
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const isAuto = percent === 'auto';
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React.useEffect(() => {
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if (isAuto && spinning) {
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setMockPercent(0);
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mockIntervalRef.current = setInterval(() => {
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setMockPercent(prev => {
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const restPTG = 100 - prev;
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for (let i = 0; i < STEP_BUCKETS.length; i += 1) {
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const [limit, stepPtg] = STEP_BUCKETS[i];
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if (prev <= limit) {
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return prev + restPTG * stepPtg;
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}
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}
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return prev;
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});
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}, AUTO_INTERVAL);
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}
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return () => {
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if (mockIntervalRef.current) {
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clearInterval(mockIntervalRef.current);
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mockIntervalRef.current = null;
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}
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};
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}, [isAuto, spinning]);
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return isAuto ? mockPercent : percent;
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}
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