ntfy/web/src/components/hooks.js

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import { useNavigate, useParams } from "react-router-dom";
import { useEffect, useState } from "react";
import subscriptionManager from "../app/SubscriptionManager";
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import { disallowedTopic, expandSecureUrl, topicUrl } from "../app/utils";
import notifier from "../app/Notifier";
import routes from "./routes";
import connectionManager from "../app/ConnectionManager";
import poller from "../app/Poller";
import pruner from "../app/Pruner";
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import session from "../app/Session";
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import accountApi from "../app/AccountApi";
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import { UnauthorizedError } from "../app/errors";
/**
* Wire connectionManager and subscriptionManager so that subscriptions are updated when the connection
* state changes. Conversely, when the subscription changes, the connection is refreshed (which may lead
* to the connection being re-established).
*/
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export const useConnectionListeners = (account, subscriptions, users) => {
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const navigate = useNavigate();
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// Register listeners for incoming messages, and connection state changes
useEffect(
() => {
const handleMessage = async (subscriptionId, message) => {
const subscription = await subscriptionManager.get(subscriptionId);
if (subscription.internal) {
await handleInternalMessage(message);
} else {
await handleNotification(subscriptionId, message);
}
};
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const handleInternalMessage = async (message) => {
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console.log(`[ConnectionListener] Received message on sync topic`, message.message);
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try {
const data = JSON.parse(message.message);
if (data.event === "sync") {
console.log(`[ConnectionListener] Triggering account sync`);
await accountApi.sync();
} else {
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console.log(`[ConnectionListener] Unknown message type. Doing nothing.`);
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}
} catch (e) {
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console.log(`[ConnectionListener] Error parsing sync topic message`, e);
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}
};
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const handleNotification = async (subscriptionId, notification) => {
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const added = await subscriptionManager.addNotification(subscriptionId, notification);
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if (added) {
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const defaultClickAction = (subscription) => navigate(routes.forSubscription(subscription));
await notifier.notify(subscriptionId, notification, defaultClickAction);
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}
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};
connectionManager.registerStateListener(subscriptionManager.updateState);
connectionManager.registerMessageListener(handleMessage);
return () => {
connectionManager.resetStateListener();
connectionManager.resetMessageListener();
};
},
// We have to disable dep checking for "navigate". This is fine, it never changes.
// eslint-disable-next-line
[]
);
// Sync topic listener: For accounts with sync_topic, subscribe to an internal topic
useEffect(() => {
if (!account || !account.sync_topic) {
return;
}
subscriptionManager.add(config.base_url, account.sync_topic, true); // Dangle!
}, [account]);
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// When subscriptions or users change, refresh the connections
useEffect(() => {
connectionManager.refresh(subscriptions, users); // Dangle
}, [subscriptions, users]);
};
/**
* Automatically adds a subscription if we navigate to a page that has not been subscribed to.
* This will only be run once after the initial page load.
*/
export const useAutoSubscribe = (subscriptions, selected) => {
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const [hasRun, setHasRun] = useState(false);
const params = useParams();
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useEffect(() => {
const loaded = subscriptions !== null && subscriptions !== undefined;
if (!loaded || hasRun) {
return;
}
setHasRun(true);
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const eligible = params.topic && !selected && !disallowedTopic(params.topic);
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if (eligible) {
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const baseUrl = params.baseUrl ? expandSecureUrl(params.baseUrl) : config.base_url;
console.log(`[Hooks] Auto-subscribing to ${topicUrl(baseUrl, params.topic)}`);
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(async () => {
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const subscription = await subscriptionManager.add(baseUrl, params.topic);
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if (session.exists()) {
try {
await accountApi.addSubscription(baseUrl, params.topic);
} catch (e) {
console.log(`[Hooks] Auto-subscribing failed`, e);
if (e instanceof UnauthorizedError) {
session.resetAndRedirect(routes.login);
}
}
}
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poller.pollInBackground(subscription); // Dangle!
})();
}
}, [params, subscriptions, selected, hasRun]);
};
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/**
* Start the poller and the pruner. This is done in a side effect as opposed to just in Pruner.js
* and Poller.js, because side effect imports are not a thing in JS, and "Optimize imports" cleans
* up "unused" imports. See https://github.com/binwiederhier/ntfy/issues/186.
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*/
export const useBackgroundProcesses = () => {
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useEffect(() => {
poller.startWorker();
pruner.startWorker();
accountApi.startWorker();
}, []);
};
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export const useAccountListener = (setAccount) => {
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useEffect(() => {
accountApi.registerListener(setAccount);
accountApi.sync(); // Dangle
return () => {
accountApi.resetListener();
};
}, []);
};