91 lines
2.3 KiB
TypeScript
91 lines
2.3 KiB
TypeScript
import * as functions from 'firebase-functions'
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import * as admin from 'firebase-admin'
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import { chargeUser, getUser } from './utils'
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import { Contract } from '../../common/contract'
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import { slugify } from '../../common/util/slugify'
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import { randomString } from '../../common/util/random-string'
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import { getNewContract } from '../../common/new-contract'
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export const createContract = functions
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.runWith({ minInstances: 1 })
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.https.onCall(
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async (
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data: {
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question: string
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description: string
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initialProb: number
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ante?: number
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closeTime?: number
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},
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context
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) => {
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const userId = context?.auth?.uid
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if (!userId) return { status: 'error', message: 'Not authorized' }
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const creator = await getUser(userId)
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if (!creator) return { status: 'error', message: 'User not found' }
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const { question, description, initialProb, ante, closeTime } = data
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if (!question || !initialProb)
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return { status: 'error', message: 'Missing contract attributes' }
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if (
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ante !== undefined &&
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(ante < 0 || ante > creator.balance || isNaN(ante) || !isFinite(ante))
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)
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return { status: 'error', message: 'Invalid ante' }
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console.log(
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'creating contract for',
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creator.username,
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'on',
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question,
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'ante:',
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ante || 0
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)
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const slug = await getSlug(question)
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const contractRef = firestore.collection('contracts').doc()
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const contract = getNewContract(
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contractRef.id,
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slug,
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creator,
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question,
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description,
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initialProb,
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ante,
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closeTime
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)
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if (ante) await chargeUser(creator.id, ante)
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await contractRef.create(contract)
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return { status: 'success', contract }
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}
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)
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const getSlug = async (question: string) => {
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const proposedSlug = slugify(question)
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const preexistingContract = await getContractFromSlug(proposedSlug)
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return preexistingContract
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? proposedSlug + '-' + randomString()
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: proposedSlug
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}
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const firestore = admin.firestore()
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export async function getContractFromSlug(slug: string) {
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const snap = await firestore
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.collection('contracts')
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.where('slug', '==', slug)
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.get()
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return snap.empty ? undefined : (snap.docs[0].data() as Contract)
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}
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