43 lines
1.5 KiB
TypeScript
43 lines
1.5 KiB
TypeScript
import * as BackgroundFetch from 'expo-background-fetch'
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import * as TaskManager from 'expo-task-manager'
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import { Platform } from 'react-native'
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import { useEffect } from 'react'
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const BACKGROUND_FETCH_TASK = "background-fetch"
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const BACKGROUND_FETCH_INTERVAL = 20
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async function backgroundUpdate() {
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async () => {
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const now = Date.now()
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console.log(`Got background fetch call at date: ${new Date(now).toISOString()}`)
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// Be sure to return the successful result type!
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return BackgroundFetch.BackgroundFetchResult.NewData
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}
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}
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TaskManager.defineTask(BACKGROUND_FETCH_TASK, backgroundUpdate)
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export async function startBackgroundFetchService(): Promise<void | (() => void)> {
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if (Platform.OS === "web") {
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const interval = setInterval(backgroundUpdate, BACKGROUND_FETCH_INTERVAL)
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return () => clearInterval(interval)
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}
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if (await TaskManager.isTaskRegisteredAsync(BACKGROUND_FETCH_TASK))
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return async () => await BackgroundFetch.unregisterTaskAsync(BACKGROUND_FETCH_TASK)
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await BackgroundFetch.registerTaskAsync(BACKGROUND_FETCH_TASK, {
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minimumInterval: BACKGROUND_FETCH_INTERVAL,
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stopOnTerminate: false,
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startOnBoot: true,
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})
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return async () => await BackgroundFetch.unregisterTaskAsync(BACKGROUND_FETCH_TASK)
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}
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export const useStartBackgroundFetchServiceEffect = () => useEffect(() => {
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let cleanup: void | (() => void) = () => {}
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startBackgroundFetchService().then(result => cleanup = result)
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return cleanup
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}, [])
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