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joplin/packages/app-mobile/components/plugins/utils/useOnDevPluginsUpdated.ts

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import useAsyncEffect from '@joplin/lib/hooks/useAsyncEffect';
import shim from '@joplin/lib/shim';
import time from '@joplin/lib/time';
import { basename, join } from 'path';
import { useRef } from 'react';
type OnDevPluginChange = (id: string)=> void;
const useOnDevPluginsUpdated = (onDevPluginChange: OnDevPluginChange, devPluginPath: string, pluginSupportEnabled: boolean) => {
const onDevPluginChangeRef = useRef(onDevPluginChange);
onDevPluginChangeRef.current = onDevPluginChange;
const isFirstUpdateRef = useRef(true);
useAsyncEffect(async (event) => {
if (!devPluginPath || !pluginSupportEnabled) return;
const itemToLastModTime = new Map<string, number>();
// publishPath should point to the publish/ subfolder of a plugin's development
// directory.
const checkPluginChange = async (pluginPublishPath: string) => {
const dirStats = await shim.fsDriver().readDirStats(pluginPublishPath);
let hasChange = false;
let changedPluginId = '';
for (const item of dirStats) {
if (item.path.endsWith('.jpl')) {
const lastModTime = itemToLastModTime.get(item.path);
const modTime = item.mtime.getTime();
if (lastModTime === undefined || lastModTime < modTime) {
itemToLastModTime.set(item.path, modTime);
hasChange = true;
changedPluginId = basename(item.path, '.jpl');
break;
}
}
}
if (hasChange) {
if (isFirstUpdateRef.current) {
// Avoid sending an event the first time the hook is called. The first iteration
// collects initial timestamp information. In that case, hasChange
// will always be true, even with no plugin reload.
isFirstUpdateRef.current = false;
} else {
onDevPluginChangeRef.current(changedPluginId);
}
}
};
while (!event.cancelled) {
const publishFolder = join(devPluginPath, 'publish');
await checkPluginChange(publishFolder);
const pollingIntervalSeconds = 5;
await time.sleep(pollingIntervalSeconds);
}
}, [devPluginPath, pluginSupportEnabled]);
};
export default useOnDevPluginsUpdated;