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useBridgeAdaptivity.ts
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useBridgeAdaptivity.ts
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import * as React from 'react';
import vkBridge from '@vkontakte/vk-bridge';
import { useIsomorphicLayoutEffect } from '../lib/useIsomorphicLayoutEffect';
export interface BridgeAdaptivity {
type: '' | 'force_mobile' | 'force_mobile_compact' | 'adaptive';
viewportWidth: number;
viewportHeight: number;
}
interface BridgeEvent {
detail: {
type: string;
data: {
[index: string]: any;
};
};
}
let initialState: BridgeAdaptivity = {
type: '',
viewportWidth: 0,
viewportHeight: 0,
};
function resolveAdaptivity(e: BridgeEvent): BridgeAdaptivity | null {
const { type, data } = e.detail;
if (type !== 'VKWebAppUpdateConfig' || !data) {
return null;
}
const { adaptivity, viewport_width: viewportWidth, viewport_height: viewportHeight } = data;
const bridgeAdaptivity: BridgeAdaptivity = {
type: '',
viewportWidth: isFinite(viewportWidth) ? +viewportWidth : 0,
viewportHeight: isFinite(viewportHeight) ? +viewportHeight : 0,
};
switch (adaptivity) {
case 'force_mobile':
case 'force_mobile_compact':
case 'adaptive':
bridgeAdaptivity.type = adaptivity;
}
return bridgeAdaptivity;
}
vkBridge.subscribe((e: BridgeEvent) => {
const bridgeAdaptivity = resolveAdaptivity(e);
if (bridgeAdaptivity) {
initialState = bridgeAdaptivity;
}
});
export function useBridgeAdaptivity(): BridgeAdaptivity {
const [bridgeAdaptivity, setBridgeAdaptivity] = React.useState<BridgeAdaptivity>(initialState);
useIsomorphicLayoutEffect(() => {
function bridgeListener(e: BridgeEvent) {
const newBridgeAdaptivity = resolveAdaptivity(e);
if (newBridgeAdaptivity) {
setBridgeAdaptivity(newBridgeAdaptivity);
}
}
vkBridge.subscribe(bridgeListener);
return () => {
vkBridge.unsubscribe(bridgeListener);
};
}, []);
return bridgeAdaptivity;
}