manifold/functions/src/on-update-contract.ts

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import * as functions from 'firebase-functions'
import { getUser, getValues } from './utils'
import {
createBadgeAwardedNotification,
createCommentOrAnswerOrUpdatedContractNotification,
} from './create-notification'
import { Contract } from '../../common/contract'
import { Bet } from '../../common/bet'
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import * as admin from 'firebase-admin'
import { ContractComment } from '../../common/comment'
import { scoreCommentorsAndBettors } from '../../common/scoring'
import {
MINIMUM_UNIQUE_BETTORS_FOR_PROVEN_CORRECT_BADGE,
ProvenCorrectBadge,
} from '../../common/badge'
import { GroupContractDoc } from '../../common/group'
export const onUpdateContract = functions.firestore
.document('contracts/{contractId}')
.onUpdate(async (change, context) => {
const contract = change.after.data() as Contract
const previousContract = change.before.data() as Contract
const { eventId } = context
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const { closeTime, question } = contract
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if (!previousContract.isResolved && contract.isResolved) {
// No need to notify users of resolution, that's handled in resolve-market
return await handleResolvedContract(contract)
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} else if (previousContract.groupSlugs !== contract.groupSlugs) {
await handleContractGroupUpdated(previousContract, contract)
} else if (
previousContract.closeTime !== closeTime ||
previousContract.question !== question
) {
await handleUpdatedCloseTime(previousContract, contract, eventId)
}
})
async function handleResolvedContract(contract: Contract) {
if (
(contract.uniqueBettorCount ?? 0) <
MINIMUM_UNIQUE_BETTORS_FOR_PROVEN_CORRECT_BADGE ||
contract.resolution === 'CANCEL'
)
return
// get all bets on this contract
const bets = await getValues<Bet>(
firestore.collection(`contracts/${contract.id}/bets`)
)
// get comments on this contract
const comments = await getValues<ContractComment>(
firestore.collection(`contracts/${contract.id}/comments`)
)
const { topCommentId, profitById, commentsById, betsById, topCommentBetId } =
scoreCommentorsAndBettors(contract, bets, comments)
if (topCommentBetId && profitById[topCommentBetId] > 0) {
// award proven correct badge to user
const comment = commentsById[topCommentId]
const bet = betsById[topCommentBetId]
const user = await getUser(comment.userId)
if (!user) return
const newProvenCorrectBadge = {
createdTime: Date.now(),
type: 'PROVEN_CORRECT',
name: 'Proven Correct',
data: {
contractSlug: contract.slug,
contractCreatorUsername: contract.creatorUsername,
commentId: comment.id,
betAmount: bet.amount,
contractTitle: contract.question,
},
} as ProvenCorrectBadge
// update user
await firestore
.collection('users')
.doc(user.id)
.update({
achievements: {
...user.achievements,
provenCorrect: {
badges: [
...(user.achievements?.provenCorrect?.badges ?? []),
newProvenCorrectBadge,
],
},
},
})
await createBadgeAwardedNotification(user, newProvenCorrectBadge)
}
}
async function handleUpdatedCloseTime(
previousContract: Contract,
contract: Contract,
eventId: string
) {
const contractUpdater = await getUser(contract.creatorId)
if (!contractUpdater) throw new Error('Could not find contract updater')
let sourceText = ''
if (previousContract.closeTime !== contract.closeTime && contract.closeTime) {
sourceText = contract.closeTime.toString()
} else if (previousContract.question !== contract.question) {
sourceText = contract.question
}
await createCommentOrAnswerOrUpdatedContractNotification(
contract.id,
'contract',
'updated',
contractUpdater,
eventId,
sourceText,
contract
)
}
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async function handleContractGroupUpdated(
previousContract: Contract,
contract: Contract
) {
const prevLength = previousContract.groupSlugs?.length ?? 0
const newLength = contract.groupSlugs?.length ?? 0
if (prevLength < newLength) {
// Contract was added to a new group
const groupId = contract.groupLinks?.find(
(link) =>
!previousContract.groupLinks
?.map((l) => l.groupId)
.includes(link.groupId)
)?.groupId
if (!groupId) throw new Error('Could not find new group id')
await firestore
.collection(`groups/${groupId}/groupContracts`)
.doc(contract.id)
.set({
contractId: contract.id,
createdTime: Date.now(),
} as GroupContractDoc)
}
if (prevLength > newLength) {
// Contract was removed from a group
const groupId = previousContract.groupLinks?.find(
(link) =>
!contract.groupLinks?.map((l) => l.groupId).includes(link.groupId)
)?.groupId
if (!groupId) throw new Error('Could not find old group id')
await firestore
.collection(`groups/${groupId}/groupContracts`)
.doc(contract.id)
.delete()
}
}
const firestore = admin.firestore()