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bede92404b
Co-authored-by: userquin <userquin@gmail.com>
64 lines
1.8 KiB
TypeScript
64 lines
1.8 KiB
TypeScript
/// <reference lib="WebWorker" />
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declare const self: ServiceWorkerGlobalScope
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const clientResolves: { [key: string]: Function } = {}
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self.addEventListener('message', (event) => {
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if (event.data.action !== 'ready-to-receive')
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return
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const id: string | undefined = (event.source as any)?.id ?? undefined
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if (id && clientResolves[id] !== undefined)
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clientResolves[id]()
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})
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export const onShareTarget = (event: FetchEvent) => {
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if (!event.request.url.endsWith('/web-share-target') || event.request.method !== 'POST')
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return
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event.waitUntil(handleSharedTarget(event))
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}
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async function handleSharedTarget(event: FetchEvent) {
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event.respondWith(Response.redirect('/home?share-target=true'))
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await waitForClientToGetReady(event.resultingClientId)
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const [client, formData] = await getClientAndFormData(event)
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if (client === undefined)
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return
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await sendShareTargetMessage(client, formData)
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}
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async function sendShareTargetMessage(client: Client, data: FormData) {
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const sharedData: { text?: string; files?: File[] } = {}
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const text = data.get('text')
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if (text !== null)
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sharedData.text = text.toString()
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const files: File[] = []
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for (const [name, file] of data.entries()) {
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if (name === 'files' && file instanceof File)
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files.push(file)
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}
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if (files.length !== 0)
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sharedData.files = files
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client.postMessage({ data: sharedData, action: 'compose-with-shared-data' })
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}
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function waitForClientToGetReady(clientId: string) {
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return new Promise<void>((resolve) => {
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clientResolves[clientId] = resolve
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})
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}
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function getClientAndFormData(event: FetchEvent): Promise<[client: Client | undefined, formData: FormData]> {
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return Promise.all([
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self.clients.get(event.resultingClientId),
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event.request.formData(),
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])
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}
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