87 lines
2.6 KiB
JavaScript
Executable file
87 lines
2.6 KiB
JavaScript
Executable file
#!/usr/bin/env node
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const { fetchNewEvents } = require('./api');
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const { collectHooks, runHook } = require('./hooks');
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require('dotenv').config();
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const state = {
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seenIds: null,
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mostRecentEventForFolder: null,
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promisesForHooks: new Map(),
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};
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const getMostRecentEvents = (events, monitoredFolders) => {
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const mostRecentEventForFolder = events
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.filter(x => x.data && x.data.folder)
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.filter(x => monitoredFolders.has(x.data.folder))
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.reduce(
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(acc, x) => {
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const date = new Date(x.time);
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const existingDate = acc[x.data.folder];
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acc[x.data.folder] =
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existingDate && existingDate > date ? existingDate : date;
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return acc;
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},
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state.mostRecentEventForFolder
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? { ...state.mostRecentEventForFolder }
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: {}
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);
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state.mostRecentEventForFolder = mostRecentEventForFolder;
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return mostRecentEventForFolder;
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};
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const convertRecentEventDatesToDelta = () => {
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const now = new Date().getTime();
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return Object.entries(state.mostRecentEventForFolder)
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.map(([folder, date]) => [folder, now - date.getTime()])
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.reduce((acc, [path, delta]) => {
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acc[path] = delta;
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return acc;
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}, {});
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};
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const poll = async () => {
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const { events, seenIds } = await fetchNewEvents(state.seenIds);
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const hooks = await collectHooks();
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const monitoredFolders = new Set(hooks.map(x => x.folder));
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const deltaForFolders =
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getMostRecentEvents(events, monitoredFolders) &&
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convertRecentEventDatesToDelta();
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hooks
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.filter(x => deltaForFolders[x.folder])
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.forEach(hook => {
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const timeToWait = hook.time - deltaForFolders[hook.folder];
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console.log(`scheduled hook "${hook.path}" to run in ${timeToWait}ms`);
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if (timeToWait < 0) {
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const existingPromise = state.promisesForHooks[hook.path];
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if (existingPromise) {
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console.log(
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`hook "${hook.path}" was skipped because it is already running`
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);
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} else {
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delete state.mostRecentEventForFolder[hook.folder];
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console.log(`running hook "${hook.path}"`);
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const promise = runHook(hook);
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state.promisesForHooks[hook.path] = promise;
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promise
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.then(() => {
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console.log(`successfully ran hook "${hook.path}"`);
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})
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.catch(error => {
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console.error(`failed to run hook "${hook.path}": ${error}`);
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})
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.finally(() => {
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delete state.promisesForHooks[hook.path];
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});
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}
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}
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});
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state.seenIds = seenIds;
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};
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setInterval(poll, 30000);
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poll();
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