18 lines
510 B
TypeScript
18 lines
510 B
TypeScript
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import * as functions from 'firebase-functions'
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import * as admin from 'firebase-admin'
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const firestore = admin.firestore()
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export const onFoldFollow = functions.firestore
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.document('folds/{foldId}/followers/{userId}')
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.onWrite(async (change, context) => {
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const { foldId } = context.params
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const snapshot = await firestore
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.collection(`folds/${foldId}/followers`)
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.get()
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const followCount = snapshot.size
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await firestore.doc(`folds/${foldId}`).update({ followCount })
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})
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