Listen for contract updates in folds feed

web/hooks/use-contracts.ts

@@ -5,6 +5,7 @@ import {
   listenForContracts,
   listenForHotContracts,
 } from '../lib/firebase/contracts'
+import { listenForTaggedContracts } from '../lib/firebase/folds'
 
 export const useContracts = () => {
   const [contracts, setContracts] = useState<Contract[] | undefined>()
@@ -16,6 +17,21 @@ export const useContracts = () => {
   return contracts
 }
 
+export const useTaggedContracts = (tags: string[] | undefined) => {
+  const [contracts, setContracts] = useState<Contract[] | undefined>(
+    tags && tags.length === 0 ? [] : undefined
+  )
+  const tagsKey = tags?.map((tag) => tag.toLowerCase()).join(',') ?? ''
+
+  useEffect(() => {
+    if (!tags || tags.length === 0) return
+    return listenForTaggedContracts(tags, setContracts)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [tagsKey])
+
+  return contracts
+}
+
 export const useHotContracts = () => {
   const [hotContracts, setHotContracts] = useState<Contract[] | undefined>()
 

web/lib/firebase/folds.ts

@@ -45,6 +45,17 @@ export async function getFoldBySlug(slug: string) {
   return folds.length === 0 ? null : folds[0]
 }
 
+function contractsByTagsQuery(tags: string[]) {
+  return query(
+    contractCollection,
+    where(
+      'lowercaseTags',
+      'array-contains-any',
+      tags.map((tag) => tag.toLowerCase())
+    )
+  )
+}
+
 export async function getFoldContracts(fold: Fold) {
   const {
     tags,
@@ -56,18 +67,7 @@ export async function getFoldContracts(fold: Fold) {
 
   const [tagsContracts, includedContracts] = await Promise.all([
     // TODO: if tags.length > 10, execute multiple parallel queries
-    tags.length > 0
-      ? getValues<Contract>(
-          query(
-            contractCollection,
-            where(
-              'lowercaseTags',
-              'array-contains-any',
-              tags.map((tag) => tag.toLowerCase())
-            )
-          )
-        )
-      : [],
+    tags.length > 0 ? getValues<Contract>(contractsByTagsQuery(tags)) : [],
 
     // TODO: if contractIds.length > 10, execute multiple parallel queries
     contractIds.length > 0
@@ -97,6 +97,13 @@ export async function getFoldContracts(fold: Fold) {
   return [...approvedContracts, ...includedContracts]
 }
 
+export function listenForTaggedContracts(
+  tags: string[],
+  setContracts: (contracts: Contract[]) => void
+) {
+  return listenForValues<Contract>(contractsByTagsQuery(tags), setContracts)
+}
+
 export function listenForFold(
   foldId: string,
   setFold: (fold: Fold | null) => void

web/lib/firebase/init.ts

@@ -2,8 +2,8 @@ import { getFirestore } from '@firebase/firestore'
 import { initializeApp, getApps, getApp } from 'firebase/app'
 
 // TODO: Reenable this when we have a way to set the Firebase db in dev
-// export const isProd = process.env.NODE_ENV === 'production'
-export const isProd = true
+export const isProd = process.env.NODE_ENV === 'production'
+// export const isProd = true
 
 const firebaseConfig = isProd
   ? {

web/pages/fold/[...slugs]/index.tsx

@@ -34,6 +34,7 @@ import Custom404 from '../../404'
 import { FollowFoldButton } from '../../../components/follow-fold-button'
 import FeedCreate from '../../../components/feed-create'
 import { SEO } from '../../../components/SEO'
+import { useTaggedContracts } from '../../../hooks/use-contracts'
 
 export async function getStaticProps(props: { params: { slugs: string[] } }) {
   const { slugs } = props.params
@@ -133,8 +134,6 @@ export default function FoldPage(props: {
 }) {
   const {
     curator,
-    contracts,
-    activeContracts,
     activeContractBets,
     activeContractComments,
     topTraders,
@@ -157,6 +156,16 @@ export default function FoldPage(props: {
   const user = useUser()
   const isCurator = user && fold && user.id === fold.curatorId
 
+  const taggedContracts = useTaggedContracts(fold?.tags) ?? props.contracts
+  const contractsMap = _.fromPairs(
+    taggedContracts.map((contract) => [contract.id, contract])
+  )
+
+  const contracts = props.contracts.map((contract) => contractsMap[contract.id])
+  const activeContracts = props.activeContracts.map(
+    (contract) => contractsMap[contract.id]
+  )
+
   if (fold === null || !foldSubpages.includes(page) || slugs[2]) {
     return <Custom404 />
   }