Compute stats in Firebase instead of Vercel (#584)

* Add stats updating cloud function

* Read stats from database on client instead of computing them

* Improve logging for stats updater

* Tidying up

common/stats.ts

@@ -0,0 +1,23 @@
+export type Stats = {
+  startDate: number
+  dailyActiveUsers: number[]
+  weeklyActiveUsers: number[]
+  monthlyActiveUsers: number[]
+  dailyBetCounts: number[]
+  dailyContractCounts: number[]
+  dailyCommentCounts: number[]
+  dailySignups: number[]
+  weekOnWeekRetention: number[]
+  monthlyRetention: number[]
+  weeklyActivationRate: number[]
+  topTenthActions: {
+    daily: number[]
+    weekly: number[]
+    monthly: number[]
+  }
+  manaBet: {
+    daily: number[]
+    weekly: number[]
+    monthly: number[]
+  }
+}

firestore.rules

@@ -12,6 +12,10 @@ service cloud.firestore {
              || request.auth.uid == 'IPTOzEqrpkWmEzh6hwvAyY9PqFb2' // Manifold
     }
 
+    match /stats/stats {
+      allow read;
+    }
+
     match /users/{userId} {
       allow read;
       allow update: if resource.data.id == request.auth.uid

functions/src/index.ts

@@ -15,6 +15,7 @@ export * from './on-create-comment'
 export * from './on-view'
 export * from './unsubscribe'
 export * from './update-metrics'
+export * from './update-stats'
 export * from './backup-db'
 export * from './change-user-info'
 export * from './market-close-notifications'

functions/src/scripts/update-stats.ts

@@ -0,0 +1,15 @@
+import { initAdmin } from './script-init'
+initAdmin()
+
+import { log, logMemory } from '../utils'
+import { updateStatsCore } from '../update-stats'
+
+async function updateStats() {
+  logMemory()
+  log('Updating stats...')
+  await updateStatsCore()
+}
+
+if (require.main === module) {
+  updateStats().then(() => process.exit())
+}

functions/src/update-stats.ts

@@ -0,0 +1,316 @@
+import * as functions from 'firebase-functions'
+import * as admin from 'firebase-admin'
+import { concat, countBy, sortBy, range, zip, uniq, sum, sumBy } from 'lodash'
+import { getValues, log, logMemory } from './utils'
+import { Bet } from '../../common/bet'
+import { Contract } from '../../common/contract'
+import { Comment } from '../../common/comment'
+import { User } from '../../common/user'
+import { DAY_MS } from '../../common/util/time'
+import { average } from '../../common/util/math'
+
+const firestore = admin.firestore()
+
+const numberOfDays = 90
+
+const getBetsQuery = (startTime: number, endTime: number) =>
+  firestore
+    .collectionGroup('bets')
+    .where('createdTime', '>=', startTime)
+    .where('createdTime', '<', endTime)
+    .orderBy('createdTime', 'asc')
+
+export async function getDailyBets(startTime: number, numberOfDays: number) {
+  const query = getBetsQuery(startTime, startTime + DAY_MS * numberOfDays)
+  const bets = await getValues<Bet>(query)
+
+  const betsByDay = range(0, numberOfDays).map(() => [] as Bet[])
+  for (const bet of bets) {
+    const dayIndex = Math.floor((bet.createdTime - startTime) / DAY_MS)
+    betsByDay[dayIndex].push(bet)
+  }
+
+  return betsByDay
+}
+
+const getCommentsQuery = (startTime: number, endTime: number) =>
+  firestore
+    .collectionGroup('comments')
+    .where('createdTime', '>=', startTime)
+    .where('createdTime', '<', endTime)
+    .orderBy('createdTime', 'asc')
+
+export async function getDailyComments(
+  startTime: number,
+  numberOfDays: number
+) {
+  const query = getCommentsQuery(startTime, startTime + DAY_MS * numberOfDays)
+  const comments = await getValues<Comment>(query)
+
+  const commentsByDay = range(0, numberOfDays).map(() => [] as Comment[])
+  for (const comment of comments) {
+    const dayIndex = Math.floor((comment.createdTime - startTime) / DAY_MS)
+    commentsByDay[dayIndex].push(comment)
+  }
+
+  return commentsByDay
+}
+
+const getContractsQuery = (startTime: number, endTime: number) =>
+  firestore
+    .collection('contracts')
+    .where('createdTime', '>=', startTime)
+    .where('createdTime', '<', endTime)
+    .orderBy('createdTime', 'asc')
+
+export async function getDailyContracts(
+  startTime: number,
+  numberOfDays: number
+) {
+  const query = getContractsQuery(startTime, startTime + DAY_MS * numberOfDays)
+  const contracts = await getValues<Contract>(query)
+
+  const contractsByDay = range(0, numberOfDays).map(() => [] as Contract[])
+  for (const contract of contracts) {
+    const dayIndex = Math.floor((contract.createdTime - startTime) / DAY_MS)
+    contractsByDay[dayIndex].push(contract)
+  }
+
+  return contractsByDay
+}
+
+const getUsersQuery = (startTime: number, endTime: number) =>
+  firestore
+    .collection('users')
+    .where('createdTime', '>=', startTime)
+    .where('createdTime', '<', endTime)
+    .orderBy('createdTime', 'asc')
+
+export async function getDailyNewUsers(
+  startTime: number,
+  numberOfDays: number
+) {
+  const query = getUsersQuery(startTime, startTime + DAY_MS * numberOfDays)
+  const users = await getValues<User>(query)
+
+  const usersByDay = range(0, numberOfDays).map(() => [] as User[])
+  for (const user of users) {
+    const dayIndex = Math.floor((user.createdTime - startTime) / DAY_MS)
+    usersByDay[dayIndex].push(user)
+  }
+
+  return usersByDay
+}
+
+export const updateStatsCore = async () => {
+  const today = Date.now()
+  const startDate = today - numberOfDays * DAY_MS
+
+  log('Fetching data for stats update...')
+  const [dailyBets, dailyContracts, dailyComments, dailyNewUsers] =
+    await Promise.all([
+      getDailyBets(startDate.valueOf(), numberOfDays),
+      getDailyContracts(startDate.valueOf(), numberOfDays),
+      getDailyComments(startDate.valueOf(), numberOfDays),
+      getDailyNewUsers(startDate.valueOf(), numberOfDays),
+    ])
+  logMemory()
+
+  const dailyBetCounts = dailyBets.map((bets) => bets.length)
+  const dailyContractCounts = dailyContracts.map(
+    (contracts) => contracts.length
+  )
+  const dailyCommentCounts = dailyComments.map((comments) => comments.length)
+
+  const dailyUserIds = zip(dailyContracts, dailyBets, dailyComments).map(
+    ([contracts, bets, comments]) => {
+      const creatorIds = (contracts ?? []).map((c) => c.creatorId)
+      const betUserIds = (bets ?? []).map((bet) => bet.userId)
+      const commentUserIds = (comments ?? []).map((comment) => comment.userId)
+      return uniq([...creatorIds, ...betUserIds, ...commentUserIds])
+    }
+  )
+  log(
+    `Fetched ${sum(dailyBetCounts)} bets, ${sum(
+      dailyContractCounts
+    )} contracts, ${sum(dailyComments)} comments, from ${sum(
+      dailyNewUsers
+    )} unique users.`
+  )
+
+  const dailyActiveUsers = dailyUserIds.map((userIds) => userIds.length)
+
+  const weeklyActiveUsers = dailyUserIds.map((_, i) => {
+    const start = Math.max(0, i - 6)
+    const end = i
+    const uniques = new Set<string>()
+    for (let j = start; j <= end; j++)
+      dailyUserIds[j].forEach((userId) => uniques.add(userId))
+    return uniques.size
+  })
+
+  const monthlyActiveUsers = dailyUserIds.map((_, i) => {
+    const start = Math.max(0, i - 29)
+    const end = i
+    const uniques = new Set<string>()
+    for (let j = start; j <= end; j++)
+      dailyUserIds[j].forEach((userId) => uniques.add(userId))
+    return uniques.size
+  })
+
+  const weekOnWeekRetention = dailyUserIds.map((_userId, i) => {
+    const twoWeeksAgo = {
+      start: Math.max(0, i - 13),
+      end: Math.max(0, i - 7),
+    }
+    const lastWeek = {
+      start: Math.max(0, i - 6),
+      end: i,
+    }
+
+    const activeTwoWeeksAgo = new Set<string>()
+    for (let j = twoWeeksAgo.start; j <= twoWeeksAgo.end; j++) {
+      dailyUserIds[j].forEach((userId) => activeTwoWeeksAgo.add(userId))
+    }
+    const activeLastWeek = new Set<string>()
+    for (let j = lastWeek.start; j <= lastWeek.end; j++) {
+      dailyUserIds[j].forEach((userId) => activeLastWeek.add(userId))
+    }
+    const retainedCount = sumBy(Array.from(activeTwoWeeksAgo), (userId) =>
+      activeLastWeek.has(userId) ? 1 : 0
+    )
+    const retainedFrac = retainedCount / activeTwoWeeksAgo.size
+    return Math.round(retainedFrac * 100 * 100) / 100
+  })
+
+  const monthlyRetention = dailyUserIds.map((_userId, i) => {
+    const twoMonthsAgo = {
+      start: Math.max(0, i - 60),
+      end: Math.max(0, i - 30),
+    }
+    const lastMonth = {
+      start: Math.max(0, i - 30),
+      end: i,
+    }
+
+    const activeTwoMonthsAgo = new Set<string>()
+    for (let j = twoMonthsAgo.start; j <= twoMonthsAgo.end; j++) {
+      dailyUserIds[j].forEach((userId) => activeTwoMonthsAgo.add(userId))
+    }
+    const activeLastMonth = new Set<string>()
+    for (let j = lastMonth.start; j <= lastMonth.end; j++) {
+      dailyUserIds[j].forEach((userId) => activeLastMonth.add(userId))
+    }
+    const retainedCount = sumBy(Array.from(activeTwoMonthsAgo), (userId) =>
+      activeLastMonth.has(userId) ? 1 : 0
+    )
+    const retainedFrac = retainedCount / activeTwoMonthsAgo.size
+    return Math.round(retainedFrac * 100 * 100) / 100
+  })
+
+  const firstBetDict: { [userId: string]: number } = {}
+  for (let i = 0; i < dailyBets.length; i++) {
+    const bets = dailyBets[i]
+    for (const bet of bets) {
+      if (bet.userId in firstBetDict) continue
+      firstBetDict[bet.userId] = i
+    }
+  }
+  const weeklyActivationRate = dailyNewUsers.map((_, i) => {
+    const start = Math.max(0, i - 6)
+    const end = i
+    let activatedCount = 0
+    let newUsers = 0
+    for (let j = start; j <= end; j++) {
+      const userIds = dailyNewUsers[j].map((user) => user.id)
+      newUsers += userIds.length
+      for (const userId of userIds) {
+        const dayIndex = firstBetDict[userId]
+        if (dayIndex !== undefined && dayIndex <= end) {
+          activatedCount++
+        }
+      }
+    }
+    const frac = activatedCount / (newUsers || 1)
+    return Math.round(frac * 100 * 100) / 100
+  })
+  const dailySignups = dailyNewUsers.map((users) => users.length)
+
+  const dailyTopTenthActions = zip(
+    dailyContracts,
+    dailyBets,
+    dailyComments
+  ).map(([contracts, bets, comments]) => {
+    const userIds = concat(
+      contracts?.map((c) => c.creatorId) ?? [],
+      bets?.map((b) => b.userId) ?? [],
+      comments?.map((c) => c.userId) ?? []
+    )
+    const counts = Object.values(countBy(userIds))
+    const sortedCounts = sortBy(counts, (count) => count).reverse()
+    if (sortedCounts.length === 0) return 0
+    const tenthPercentile = sortedCounts[Math.floor(sortedCounts.length * 0.1)]
+    return tenthPercentile
+  })
+  const weeklyTopTenthActions = dailyTopTenthActions.map((_, i) => {
+    const start = Math.max(0, i - 6)
+    const end = i
+    return average(dailyTopTenthActions.slice(start, end))
+  })
+  const monthlyTopTenthActions = dailyTopTenthActions.map((_, i) => {
+    const start = Math.max(0, i - 29)
+    const end = i
+    return average(dailyTopTenthActions.slice(start, end))
+  })
+
+  // Total mana divided by 100.
+  const dailyManaBet = dailyBets.map((bets) => {
+    return Math.round(sumBy(bets, (bet) => bet.amount) / 100)
+  })
+  const weeklyManaBet = dailyManaBet.map((_, i) => {
+    const start = Math.max(0, i - 6)
+    const end = i
+    const total = sum(dailyManaBet.slice(start, end))
+    if (end - start < 7) return (total * 7) / (end - start)
+    return total
+  })
+  const monthlyManaBet = dailyManaBet.map((_, i) => {
+    const start = Math.max(0, i - 29)
+    const end = i
+    const total = sum(dailyManaBet.slice(start, end))
+    const range = end - start + 1
+    if (range < 30) return (total * 30) / range
+    return total
+  })
+
+  const statsData = {
+    startDate: startDate.valueOf(),
+    dailyActiveUsers,
+    weeklyActiveUsers,
+    monthlyActiveUsers,
+    dailyBetCounts,
+    dailyContractCounts,
+    dailyCommentCounts,
+    dailySignups,
+    weekOnWeekRetention,
+    weeklyActivationRate,
+    monthlyRetention,
+    topTenthActions: {
+      daily: dailyTopTenthActions,
+      weekly: weeklyTopTenthActions,
+      monthly: monthlyTopTenthActions,
+    },
+    manaBet: {
+      daily: dailyManaBet,
+      weekly: weeklyManaBet,
+      monthly: monthlyManaBet,
+    },
+  }
+  log('Computed stats: ', statsData)
+  await firestore.doc('stats/stats').set(statsData)
+}
+
+export const updateStats = functions
+  .runWith({ memory: '1GB', timeoutSeconds: 540 })
+  .pubsub.schedule('every 60 minutes')
+  .onRun(updateStatsCore)

web/lib/firebase/bets.ts

@@ -5,7 +5,7 @@ import {
   where,
   orderBy,
 } from 'firebase/firestore'
-import { range, uniq } from 'lodash'
+import { uniq } from 'lodash'
 
 import { db } from './init'
 import { Bet } from 'common/bet'
@@ -136,24 +136,3 @@ export function withoutAnteBets(contract: Contract, bets?: Bet[]) {
 
   return bets?.filter((bet) => !bet.isAnte) ?? []
 }
-
-const getBetsQuery = (startTime: number, endTime: number) =>
-  query(
-    collectionGroup(db, 'bets'),
-    where('createdTime', '>=', startTime),
-    where('createdTime', '<', endTime),
-    orderBy('createdTime', 'asc')
-  )
-
-export async function getDailyBets(startTime: number, numberOfDays: number) {
-  const query = getBetsQuery(startTime, startTime + DAY_IN_MS * numberOfDays)
-  const bets = await getValues<Bet>(query)
-
-  const betsByDay = range(0, numberOfDays).map(() => [] as Bet[])
-  for (const bet of bets) {
-    const dayIndex = Math.floor((bet.createdTime - startTime) / DAY_IN_MS)
-    betsByDay[dayIndex].push(bet)
-  }
-
-  return betsByDay
-}

web/lib/firebase/comments.ts

@@ -7,7 +7,6 @@ import {
   setDoc,
   where,
 } from 'firebase/firestore'
-import { range } from 'lodash'
 
 import { getValues, listenForValues } from './utils'
 import { db } from './init'
@@ -136,33 +135,6 @@ export function listenForRecentComments(
   return listenForValues<Comment>(recentCommentsQuery, setComments)
 }
 
-const getCommentsQuery = (startTime: number, endTime: number) =>
-  query(
-    collectionGroup(db, 'comments'),
-    where('createdTime', '>=', startTime),
-    where('createdTime', '<', endTime),
-    orderBy('createdTime', 'asc')
-  )
-
-export async function getDailyComments(
-  startTime: number,
-  numberOfDays: number
-) {
-  const query = getCommentsQuery(
-    startTime,
-    startTime + DAY_IN_MS * numberOfDays
-  )
-  const comments = await getValues<Comment>(query)
-
-  const commentsByDay = range(0, numberOfDays).map(() => [] as Comment[])
-  for (const comment of comments) {
-    const dayIndex = Math.floor((comment.createdTime - startTime) / DAY_IN_MS)
-    commentsByDay[dayIndex].push(comment)
-  }
-
-  return commentsByDay
-}
-
 const getUsersCommentsQuery = (userId: string) =>
   query(
     collectionGroup(db, 'comments'),

web/lib/firebase/contracts.ts

@@ -14,7 +14,7 @@ import {
   limit,
   startAfter,
 } from 'firebase/firestore'
-import { range, sortBy, sum } from 'lodash'
+import { sortBy, sum } from 'lodash'
 
 import { app } from './init'
 import { getValues, listenForValue, listenForValues } from './utils'
@@ -303,35 +303,6 @@ export async function getClosingSoonContracts() {
   )
 }
 
-const getContractsQuery = (startTime: number, endTime: number) =>
-  query(
-    collection(db, 'contracts'),
-    where('createdTime', '>=', startTime),
-    where('createdTime', '<', endTime),
-    orderBy('createdTime', 'asc')
-  )
-
-const DAY_IN_MS = 24 * 60 * 60 * 1000
-
-export async function getDailyContracts(
-  startTime: number,
-  numberOfDays: number
-) {
-  const query = getContractsQuery(
-    startTime,
-    startTime + DAY_IN_MS * numberOfDays
-  )
-  const contracts = await getValues<Contract>(query)
-
-  const contractsByDay = range(0, numberOfDays).map(() => [] as Contract[])
-  for (const contract of contracts) {
-    const dayIndex = Math.floor((contract.createdTime - startTime) / DAY_IN_MS)
-    contractsByDay[dayIndex].push(contract)
-  }
-
-  return contractsByDay
-}
-
 export async function getRecentBetsAndComments(contract: Contract) {
   const contractDoc = doc(db, 'contracts', contract.id)
 

web/lib/firebase/stats.ts

@@ -0,0 +1,15 @@
+import {
+  CollectionReference,
+  doc,
+  collection,
+  getDoc,
+} from 'firebase/firestore'
+import { db } from 'web/lib/firebase/init'
+import { Stats } from 'common/stats'
+
+const statsCollection = collection(db, 'stats') as CollectionReference<Stats>
+const statsDoc = doc(statsCollection, 'stats')
+
+export const getStats = async () => {
+  return (await getDoc(statsDoc)).data()
+}

web/lib/firebase/users.ts

@@ -21,13 +21,12 @@ import {
   GoogleAuthProvider,
   signInWithPopup,
 } from 'firebase/auth'
-import { range, throttle, zip } from 'lodash'
+import { throttle, zip } from 'lodash'
 
 import { app } from './init'
 import { PortfolioMetrics, PrivateUser, User } from 'common/user'
 import { createUser } from './fn-call'
 import { getValue, getValues, listenForValue, listenForValues } from './utils'
-import { DAY_MS } from 'common/util/time'
 import { feed } from 'common/feed'
 import { CATEGORY_LIST } from 'common/categories'
 import { safeLocalStorage } from '../util/local'
@@ -214,30 +213,6 @@ export function getUsers() {
   return getValues<User>(collection(db, 'users'))
 }
 
-const getUsersQuery = (startTime: number, endTime: number) =>
-  query(
-    collection(db, 'users'),
-    where('createdTime', '>=', startTime),
-    where('createdTime', '<', endTime),
-    orderBy('createdTime', 'asc')
-  )
-
-export async function getDailyNewUsers(
-  startTime: number,
-  numberOfDays: number
-) {
-  const query = getUsersQuery(startTime, startTime + DAY_MS * numberOfDays)
-  const users = await getValues<User>(query)
-
-  const usersByDay = range(0, numberOfDays).map(() => [] as User[])
-  for (const user of users) {
-    const dayIndex = Math.floor((user.createdTime - startTime) / DAY_MS)
-    usersByDay[dayIndex].push(user)
-  }
-
-  return usersByDay
-}
-
 export async function getUserFeed(userId: string) {
   const feedDoc = doc(db, 'private-users', userId, 'cache', 'feed')
   const userFeed = await getValue<{

web/pages/embed/analytics.tsx

@@ -1,18 +1,21 @@
+import { useState, useEffect } from 'react'
 import { Col } from 'web/components/layout/col'
 import { Spacer } from 'web/components/layout/spacer'
-import { fromPropz } from 'web/hooks/use-propz'
-import Analytics, {
-  CustomAnalytics,
-  FirebaseAnalytics,
-  getStaticPropz,
-} from '../stats'
+import { CustomAnalytics, FirebaseAnalytics } from '../stats'
+import { getStats } from 'web/lib/firebase/stats'
+import { Stats } from 'common/stats'
 
-export const getStaticProps = fromPropz(getStaticPropz)
-
-export default function AnalyticsEmbed(props: Parameters<typeof Analytics>[0]) {
+export default function AnalyticsEmbed() {
+  const [stats, setStats] = useState<Stats | undefined>(undefined)
+  useEffect(() => {
+    getStats().then(setStats)
+  }, [])
+  if (stats == null) {
+    return <></>
+  }
   return (
     <Col className="w-full bg-white px-2">
-      <CustomAnalytics {...props} />
+      <CustomAnalytics {...stats} />
       <Spacer h={8} />
       <FirebaseAnalytics />
     </Col>

web/pages/stats.tsx

@@ -1,5 +1,5 @@
 import dayjs from 'dayjs'
-import { zip, uniq, sumBy, concat, countBy, sortBy, sum } from 'lodash'
+import { useEffect, useState } from 'react'
 import {
   DailyCountChart,
   DailyPercentChart,
@@ -9,265 +9,18 @@ import { Spacer } from 'web/components/layout/spacer'
 import { Tabs } from 'web/components/layout/tabs'
 import { Page } from 'web/components/page'
 import { Title } from 'web/components/title'
-import { fromPropz, usePropz } from 'web/hooks/use-propz'
-import { getDailyBets } from 'web/lib/firebase/bets'
-import { getDailyComments } from 'web/lib/firebase/comments'
-import { getDailyContracts } from 'web/lib/firebase/contracts'
-import { getDailyNewUsers } from 'web/lib/firebase/users'
 import { SiteLink } from 'web/components/site-link'
 import { Linkify } from 'web/components/linkify'
-import { average } from 'common/util/math'
+import { getStats } from 'web/lib/firebase/stats'
+import { Stats } from 'common/stats'
 
-export const getStaticProps = fromPropz(getStaticPropz)
-export async function getStaticPropz() {
-  const numberOfDays = 90
-  const today = dayjs(dayjs().format('YYYY-MM-DD'))
-    // Convert from UTC midnight to PT midnight.
-    .add(7, 'hours')
-
-  const startDate = today.subtract(numberOfDays, 'day')
-
-  const [dailyBets, dailyContracts, dailyComments, dailyNewUsers] =
-    await Promise.all([
-      getDailyBets(startDate.valueOf(), numberOfDays),
-      getDailyContracts(startDate.valueOf(), numberOfDays),
-      getDailyComments(startDate.valueOf(), numberOfDays),
-      getDailyNewUsers(startDate.valueOf(), numberOfDays),
-    ])
-
-  const dailyBetCounts = dailyBets.map((bets) => bets.length)
-  const dailyContractCounts = dailyContracts.map(
-    (contracts) => contracts.length
-  )
-  const dailyCommentCounts = dailyComments.map((comments) => comments.length)
-
-  const dailyUserIds = zip(dailyContracts, dailyBets, dailyComments).map(
-    ([contracts, bets, comments]) => {
-      const creatorIds = (contracts ?? []).map((c) => c.creatorId)
-      const betUserIds = (bets ?? []).map((bet) => bet.userId)
-      const commentUserIds = (comments ?? []).map((comment) => comment.userId)
-      return uniq([...creatorIds, ...betUserIds, ...commentUserIds])
-    }
-  )
-
-  const dailyActiveUsers = dailyUserIds.map((userIds) => userIds.length)
-
-  const weeklyActiveUsers = dailyUserIds.map((_, i) => {
-    const start = Math.max(0, i - 6)
-    const end = i
-    const uniques = new Set<string>()
-    for (let j = start; j <= end; j++)
-      dailyUserIds[j].forEach((userId) => uniques.add(userId))
-    return uniques.size
-  })
-
-  const monthlyActiveUsers = dailyUserIds.map((_, i) => {
-    const start = Math.max(0, i - 29)
-    const end = i
-    const uniques = new Set<string>()
-    for (let j = start; j <= end; j++)
-      dailyUserIds[j].forEach((userId) => uniques.add(userId))
-    return uniques.size
-  })
-
-  const weekOnWeekRetention = dailyUserIds.map((_userId, i) => {
-    const twoWeeksAgo = {
-      start: Math.max(0, i - 13),
-      end: Math.max(0, i - 7),
-    }
-    const lastWeek = {
-      start: Math.max(0, i - 6),
-      end: i,
-    }
-
-    const activeTwoWeeksAgo = new Set<string>()
-    for (let j = twoWeeksAgo.start; j <= twoWeeksAgo.end; j++) {
-      dailyUserIds[j].forEach((userId) => activeTwoWeeksAgo.add(userId))
-    }
-    const activeLastWeek = new Set<string>()
-    for (let j = lastWeek.start; j <= lastWeek.end; j++) {
-      dailyUserIds[j].forEach((userId) => activeLastWeek.add(userId))
-    }
-    const retainedCount = sumBy(Array.from(activeTwoWeeksAgo), (userId) =>
-      activeLastWeek.has(userId) ? 1 : 0
-    )
-    const retainedFrac = retainedCount / activeTwoWeeksAgo.size
-    return Math.round(retainedFrac * 100 * 100) / 100
-  })
-
-  const monthlyRetention = dailyUserIds.map((_userId, i) => {
-    const twoMonthsAgo = {
-      start: Math.max(0, i - 60),
-      end: Math.max(0, i - 30),
-    }
-    const lastMonth = {
-      start: Math.max(0, i - 30),
-      end: i,
-    }
-
-    const activeTwoMonthsAgo = new Set<string>()
-    for (let j = twoMonthsAgo.start; j <= twoMonthsAgo.end; j++) {
-      dailyUserIds[j].forEach((userId) => activeTwoMonthsAgo.add(userId))
-    }
-    const activeLastMonth = new Set<string>()
-    for (let j = lastMonth.start; j <= lastMonth.end; j++) {
-      dailyUserIds[j].forEach((userId) => activeLastMonth.add(userId))
-    }
-    const retainedCount = sumBy(Array.from(activeTwoMonthsAgo), (userId) =>
-      activeLastMonth.has(userId) ? 1 : 0
-    )
-    const retainedFrac = retainedCount / activeTwoMonthsAgo.size
-    return Math.round(retainedFrac * 100 * 100) / 100
-  })
-
-  const firstBetDict: { [userId: string]: number } = {}
-  for (let i = 0; i < dailyBets.length; i++) {
-    const bets = dailyBets[i]
-    for (const bet of bets) {
-      if (bet.userId in firstBetDict) continue
-      firstBetDict[bet.userId] = i
-    }
-  }
-  const weeklyActivationRate = dailyNewUsers.map((_, i) => {
-    const start = Math.max(0, i - 6)
-    const end = i
-    let activatedCount = 0
-    let newUsers = 0
-    for (let j = start; j <= end; j++) {
-      const userIds = dailyNewUsers[j].map((user) => user.id)
-      newUsers += userIds.length
-      for (const userId of userIds) {
-        const dayIndex = firstBetDict[userId]
-        if (dayIndex !== undefined && dayIndex <= end) {
-          activatedCount++
-        }
-      }
-    }
-    const frac = activatedCount / (newUsers || 1)
-    return Math.round(frac * 100 * 100) / 100
-  })
-  const dailySignups = dailyNewUsers.map((users) => users.length)
-
-  const dailyTopTenthActions = zip(
-    dailyContracts,
-    dailyBets,
-    dailyComments
-  ).map(([contracts, bets, comments]) => {
-    const userIds = concat(
-      contracts?.map((c) => c.creatorId) ?? [],
-      bets?.map((b) => b.userId) ?? [],
-      comments?.map((c) => c.userId) ?? []
-    )
-    const counts = Object.values(countBy(userIds))
-    const sortedCounts = sortBy(counts, (count) => count).reverse()
-    if (sortedCounts.length === 0) return 0
-    const tenthPercentile = sortedCounts[Math.floor(sortedCounts.length * 0.1)]
-    return tenthPercentile
-  })
-  const weeklyTopTenthActions = dailyTopTenthActions.map((_, i) => {
-    const start = Math.max(0, i - 6)
-    const end = i
-    return average(dailyTopTenthActions.slice(start, end))
-  })
-  const monthlyTopTenthActions = dailyTopTenthActions.map((_, i) => {
-    const start = Math.max(0, i - 29)
-    const end = i
-    return average(dailyTopTenthActions.slice(start, end))
-  })
-
-  // Total mana divided by 100.
-  const dailyManaBet = dailyBets.map((bets) => {
-    return Math.round(sumBy(bets, (bet) => bet.amount) / 100)
-  })
-  const weeklyManaBet = dailyManaBet.map((_, i) => {
-    const start = Math.max(0, i - 6)
-    const end = i
-    const total = sum(dailyManaBet.slice(start, end))
-    if (end - start < 7) return (total * 7) / (end - start)
-    return total
-  })
-  const monthlyManaBet = dailyManaBet.map((_, i) => {
-    const start = Math.max(0, i - 29)
-    const end = i
-    const total = sum(dailyManaBet.slice(start, end))
-    const range = end - start + 1
-    if (range < 30) return (total * 30) / range
-    return total
-  })
-
-  return {
-    props: {
-      startDate: startDate.valueOf(),
-      dailyActiveUsers,
-      weeklyActiveUsers,
-      monthlyActiveUsers,
-      dailyBetCounts,
-      dailyContractCounts,
-      dailyCommentCounts,
-      dailySignups,
-      weekOnWeekRetention,
-      weeklyActivationRate,
-      monthlyRetention,
-      topTenthActions: {
-        daily: dailyTopTenthActions,
-        weekly: weeklyTopTenthActions,
-        monthly: monthlyTopTenthActions,
-      },
-      manaBet: {
-        daily: dailyManaBet,
-        weekly: weeklyManaBet,
-        monthly: monthlyManaBet,
-      },
-    },
-    revalidate: 60 * 60, // Regenerate after an hour
-  }
-}
-
-export default function Analytics(props: {
-  startDate: number
-  dailyActiveUsers: number[]
-  weeklyActiveUsers: number[]
-  monthlyActiveUsers: number[]
-  dailyBetCounts: number[]
-  dailyContractCounts: number[]
-  dailyCommentCounts: number[]
-  dailySignups: number[]
-  weekOnWeekRetention: number[]
-  monthlyRetention: number[]
-  weeklyActivationRate: number[]
-  topTenthActions: {
-    daily: number[]
-    weekly: number[]
-    monthly: number[]
-  }
-  manaBet: {
-    daily: number[]
-    weekly: number[]
-    monthly: number[]
-  }
-}) {
-  props = usePropz(props, getStaticPropz) ?? {
-    startDate: 0,
-    dailyActiveUsers: [],
-    weeklyActiveUsers: [],
-    monthlyActiveUsers: [],
-    dailyBetCounts: [],
-    dailyContractCounts: [],
-    dailyCommentCounts: [],
-    dailySignups: [],
-    weekOnWeekRetention: [],
-    monthlyRetention: [],
-    weeklyActivationRate: [],
-    topTenthActions: {
-      daily: [],
-      weekly: [],
-      monthly: [],
-    },
-    manaBet: {
-      daily: [],
-      weekly: [],
-      monthly: [],
-    },
+export default function Analytics() {
+  const [stats, setStats] = useState<Stats | undefined>(undefined)
+  useEffect(() => {
+    getStats().then(setStats)
+  }, [])
+  if (stats == null) {
+    return <></>
   }
   return (
     <Page>
@@ -275,7 +28,7 @@ export default function Analytics(props: {
         tabs={[
           {
             title: 'Activity',
-            content: <CustomAnalytics {...props} />,
+            content: <CustomAnalytics {...stats} />,
           },
           {
             title: 'Market Stats',