SpaceCache/app.js

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const config = require("./config.json");
const spaces = require("./spaces.json");
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const { setInterval } = require("node:timers/promises");
const fetch = require("node-fetch");
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const NodeCache = require("node-cache");
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const jp = require('jsonpath');
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const cache = new NodeCache({ stdTTL: config.checkperiod * 3 });
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(async function () {
for await (const time of setInterval(config.checkperiod * 10)) {
console.log("Checking for spaces...");
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for (const space of spaces) {
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console.log(`Checking ${space.id}...`);
let o = await checkSpace(space);
console.log(`Space ${space.id} is ${o ? "open" : "closed"}`);
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}
}
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})();
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async function checkSpace(space) {
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const response = await fetch(space.endpoint);
const data = await response.json();
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let open;
if (!space.path) {
try { open = data.state.open; }
catch { console.error(`The space ${space.id} is not using the SpaceAPI standard. Please specify a path.`); }
} else {
try { open = (jp.query(data, space.path) == (space.expected ? space.expected : true)); }
catch { console.error(`The space ${space.id} has an invalid JSONPath to the target value. Please use https://jsonpath.com/ to evaluate the path.`); }
}
return open;
}