Tear out old contract tracking stuff per James

web/components/feed/feed-items.tsx

@@ -1,5 +1,5 @@
 // From https://tailwindui.com/components/application-ui/lists/feeds
-import React, { useCallback } from 'react'
+import React from 'react'
 import {
   BanIcon,
   CheckIcon,
@@ -22,9 +22,8 @@ import { UserLink } from '../user-page'
 import BetRow from '../bet-row'
 import { Avatar } from '../avatar'
 import { ActivityItem } from './activity-items'
-import { pushSeenContract } from 'web/lib/firebase/seen-contracts'
 import { useUser } from 'web/hooks/use-user'
-import { trackClick, trackView } from 'web/lib/firebase/tracking'
+import { trackClick } from 'web/lib/firebase/tracking'
 import { DAY_MS } from 'common/util/time'
 import NewContractBadge from '../new-contract-badge'
 import { RelativeTimestamp } from '../relative-timestamp'
@@ -39,7 +38,6 @@ import { FeedLiquidity } from './feed-liquidity'
 import { SignUpPrompt } from '../sign-up-prompt'
 import { User } from 'common/user'
 import { PlayMoneyDisclaimer } from '../play-money-disclaimer'
-import { VisibilityObserver } from '../visibility-observer'
 
 export function FeedItems(props: {
   contract: Contract
@@ -51,19 +49,8 @@ export function FeedItems(props: {
   const { contract, items, className, betRowClassName, user } = props
   const { outcomeType } = contract
 
-  const onVisibilityUpdated = useCallback(
-    (visible) => {
-      if (visible && user) {
-        pushSeenContract(contract.id)
-        trackView(user.id, contract.id)
-      }
-    },
-    [contract.id, user]
-  )
-
   return (
     <div className={clsx('flow-root', className)}>
-      <VisibilityObserver onVisibilityUpdated={onVisibilityUpdated} />
       <div className={clsx(tradingAllowed(contract) ? '' : '-mb-6')}>
         {items.map((item, activityItemIdx) => (
           <div key={item.id} className={'relative pb-4'}>

web/lib/firebase/seen-contracts.ts

@@ -1,22 +0,0 @@
-import { mapValues } from 'lodash'
-
-const key = 'feed-seen-contracts'
-
-export const pushSeenContract = (contractId: string) => {
-  const newSeenContracts = {
-    ...getSeenContracts(),
-    [contractId]: Date.now(),
-  }
-  setSeenContracts(newSeenContracts)
-}
-
-export const setSeenContracts = (timestampsById: { [k: string]: number }) => {
-  localStorage.setItem(key, JSON.stringify(timestampsById))
-}
-
-export const getSeenContracts = () => {
-  return mapValues(
-    JSON.parse(localStorage.getItem(key) ?? '{}'),
-    (time) => +time
-  )
-}