WIP liking markets with tip

common/like.ts

@@ -0,0 +1,7 @@
+export type Like = {
+  id: string
+  userId: string
+  contractId: string
+  createdTime: number
+  tipTxnId?: string
+}

common/notification.ts

@@ -40,6 +40,8 @@ export type notification_source_types =
   | 'challenge'
   | 'betting_streak_bonus'
   | 'loan'
+  | 'like'
+  | 'tip_and_like'
 
 export type notification_source_update_types =
   | 'created'
@@ -71,3 +73,5 @@ export type notification_reason_types =
   | 'betting_streak_incremented'
   | 'loan_income'
   | 'you_follow_contract'
+  | 'liked_your_contract'
+  | 'liked_and_tipped_your_contract'

firestore.rules

@@ -62,6 +62,11 @@ service cloud.firestore {
       allow write: if request.auth.uid == userId;
     }
 
+    match /users/{userId}/likes/{likeId} {
+      allow read;
+      allow write: if request.auth.uid == userId;
+    }
+
     match /{somePath=**}/follows/{followUserId} {
       allow read;
     }

functions/src/create-notification.ts

@@ -18,6 +18,7 @@ import { TipTxn } from '../../common/txn'
 import { Group, GROUP_CHAT_SLUG } from '../../common/group'
 import { Challenge } from '../../common/challenge'
 import { richTextToString } from '../../common/util/parse'
+import { Like } from '../../common/like'
 const firestore = admin.firestore()
 
 type user_to_reason_texts = {
@@ -689,3 +690,36 @@ export const createBettingStreakBonusNotification = async (
   }
   return await notificationRef.set(removeUndefinedProps(notification))
 }
+
+export const createLikeNotification = async (
+  fromUser: User,
+  toUser: User,
+  like: Like,
+  idempotencyKey: string,
+  contract: Contract,
+  tip?: TipTxn
+) => {
+  const notificationRef = firestore
+    .collection(`/users/${toUser.id}/notifications`)
+    .doc(idempotencyKey)
+  const notification: Notification = {
+    id: idempotencyKey,
+    userId: toUser.id,
+    reason: tip ? 'liked_and_tipped_your_contract' : 'liked_your_contract',
+    createdTime: Date.now(),
+    isSeen: false,
+    sourceId: like.id,
+    sourceType: tip ? 'tip_and_like' : 'like',
+    sourceUpdateType: 'created',
+    sourceUserName: fromUser.name,
+    sourceUserUsername: fromUser.username,
+    sourceUserAvatarUrl: fromUser.avatarUrl,
+    sourceText: tip?.amount.toString(),
+    sourceContractCreatorUsername: contract.creatorUsername,
+    sourceContractTitle: contract.question,
+    sourceContractSlug: contract.slug,
+    sourceSlug: contract.slug,
+    sourceTitle: contract.question,
+  }
+  return await notificationRef.set(removeUndefinedProps(notification))
+}

functions/src/index.ts

@@ -31,6 +31,7 @@ export * from './weekly-markets-emails'
 export * from './reset-betting-streaks'
 export * from './reset-weekly-emails-flag'
 export * from './on-update-contract-follow'
+export * from './on-create-like'
 
 // v2
 export * from './health'

functions/src/on-create-like.ts

@@ -0,0 +1,53 @@
+import * as functions from 'firebase-functions'
+import * as admin from 'firebase-admin'
+import { Like } from '../../common/like'
+import { getContract, getUser, log } from './utils'
+import { createLikeNotification } from './create-notification'
+import { TipTxn } from '../../common/txn'
+
+const firestore = admin.firestore()
+
+export const onCreateLike = functions.firestore
+  .document('users/{userId}/likes/{likeId}')
+  .onCreate(async (change, context) => {
+    const like = change.data() as Like
+    const { eventId } = context
+    await handleCreateLike(like, eventId)
+  })
+
+const handleCreateLike = async (like: Like, eventId: string) => {
+  const contract = await getContract(like.contractId)
+  if (!contract) {
+    log('Could not find contract')
+    return
+  }
+  const contractCreator = await getUser(contract.creatorId)
+  if (!contractCreator) {
+    log('Could not find contract creator')
+    return
+  }
+  const liker = await getUser(like.userId)
+  if (!liker) {
+    log('Could not find liker')
+    return
+  }
+  let tipTxnData = undefined
+
+  if (like.tipTxnId) {
+    const tipTxn = await firestore.collection('txns').doc(like.tipTxnId).get()
+    if (!tipTxn.exists) {
+      log('Could not find tip txn')
+      return
+    }
+    tipTxnData = tipTxn.data() as TipTxn
+  }
+
+  await createLikeNotification(
+    liker,
+    contractCreator,
+    like,
+    eventId,
+    contract,
+    tipTxnData
+  )
+}

web/components/contract/contract-overview.tsx

@@ -21,6 +21,7 @@ import { ContractDescription } from './contract-description'
 import { ContractDetails } from './contract-details'
 import { NumericGraph } from './numeric-graph'
 import { ShareRow } from './share-row'
+import { LikeMarketButton } from 'web/components/contract/like-market-button'
 
 export const ContractOverview = (props: {
   contract: Contract
@@ -43,6 +44,9 @@ export const ContractOverview = (props: {
           <div className="text-2xl text-indigo-700 md:text-3xl">
             <Linkify text={question} />
           </div>
+          {(outcomeType === 'FREE_RESPONSE' ||
+            outcomeType === 'MULTIPLE_CHOICE') &&
+            !resolution && <LikeMarketButton contract={contract} user={user} />}
           <Row className={'hidden gap-3 xl:flex'}>
             {isBinary && (
               <BinaryResolutionOrChance
@@ -71,21 +75,36 @@ export const ContractOverview = (props: {
         {isBinary ? (
           <Row className="items-center justify-between gap-4 xl:hidden">
             <BinaryResolutionOrChance contract={contract} />
-            {tradingAllowed(contract) && (
-              <Col>
-                <BetButton contract={contract as CPMMBinaryContract} />
-                {!user && (
-                  <div className="mt-1 text-sm text-gray-500">
-                    (with play money!)
-                  </div>
-                )}
-              </Col>
-            )}
+            <Row className={'items-center justify-center'}>
+              <LikeMarketButton contract={contract} user={user} />
+              {tradingAllowed(contract) && (
+                <Col>
+                  <BetButton contract={contract as CPMMBinaryContract} />
+                  {!user && (
+                    <div className="mt-1 text-center text-sm text-gray-500">
+                      (with play money!)
+                    </div>
+                  )}
+                </Col>
+              )}
+            </Row>
           </Row>
         ) : isPseudoNumeric ? (
           <Row className="items-center justify-between gap-4 xl:hidden">
             <PseudoNumericResolutionOrExpectation contract={contract} />
-            {tradingAllowed(contract) && <BetButton contract={contract} />}
+            <Row className={'items-center justify-center'}>
+              <LikeMarketButton contract={contract} user={user} />
+              {tradingAllowed(contract) && (
+                <Col>
+                  <BetButton contract={contract} />
+                  {!user && (
+                    <div className="mt-1 text-center text-sm text-gray-500">
+                      (with play money!)
+                    </div>
+                  )}
+                </Col>
+              )}
+            </Row>
           </Row>
         ) : (
           (outcomeType === 'FREE_RESPONSE' ||

web/components/contract/like-market-button.tsx

@@ -0,0 +1,92 @@
+import { HeartIcon } from '@heroicons/react/outline'
+import { Button } from 'web/components/button'
+import React from 'react'
+import { Contract } from 'common/contract'
+import { User } from 'common/user'
+import { collection, deleteDoc, doc, setDoc } from 'firebase/firestore'
+import { removeUndefinedProps } from 'common/util/object'
+import { track } from '@amplitude/analytics-browser'
+import { db } from 'web/lib/firebase/init'
+import { Like } from 'common/like'
+import { useUserLikes } from 'web/hooks/use-likes'
+import { transact } from 'web/lib/firebase/api'
+import toast from 'react-hot-toast'
+import { formatMoney } from 'common/util/format'
+
+function getLikesCollection(userId: string) {
+  return collection(db, 'users', userId, 'likes')
+}
+const LIKE_TIP_AMOUNT = 5
+
+export function LikeMarketButton(props: {
+  contract: Contract
+  user: User | null | undefined
+}) {
+  const { contract, user } = props
+
+  const likes = useUserLikes(user?.id)
+  const likedContractIds = likes?.map((l) => l.contractId)
+  if (!user) return <div />
+
+  const onLike = async () => {
+    if (likedContractIds?.includes(contract.id)) {
+      const ref = doc(
+        getLikesCollection(user.id),
+        likes?.find((l) => l.contractId === contract.id)?.id
+      )
+      await deleteDoc(ref)
+      toast(`You removed this market from your likes`)
+
+      return
+    }
+    if (user.balance < LIKE_TIP_AMOUNT) {
+      toast('You do not have enough M$ to like this market!')
+      return
+    }
+    let result: any = {}
+    if (LIKE_TIP_AMOUNT > 0) {
+      result = await transact({
+        amount: LIKE_TIP_AMOUNT,
+        fromId: user.id,
+        fromType: 'USER',
+        toId: contract.creatorId,
+        toType: 'USER',
+        token: 'M$',
+        category: 'TIP',
+        data: { contractId: contract.id },
+        description: `${user.name} liked contract ${contract.id} for M$ ${LIKE_TIP_AMOUNT} to ${contract.creatorId} `,
+      })
+      console.log('result', result)
+    }
+    // create new like in db under users collection
+    const ref = doc(getLikesCollection(user.id))
+    // contract slug and question are set via trigger
+    const like = removeUndefinedProps({
+      id: ref.id,
+      userId: user.id,
+      createdTime: Date.now(),
+      contractId: contract.id,
+      tipTxnId: result.txn.id,
+    } as Like)
+    track('like', {
+      contractId: contract.id,
+    })
+    await setDoc(ref, like)
+    toast(`You tipped ${contract.creatorName} ${formatMoney(LIKE_TIP_AMOUNT)}!`)
+  }
+
+  return (
+    <Button
+      size={'md'}
+      className={'mb-1'}
+      color={'gray-white'}
+      onClick={onLike}
+    >
+      {likedContractIds?.includes(contract.id) ? (
+        <HeartIcon className="h-6 w-6 fill-red-500 text-red-500" />
+      ) : (
+        <HeartIcon className="h-6 w-6 text-gray-500" />
+      )}
+    </Button>
+  )
+}

web/hooks/use-likes.ts

@@ -0,0 +1,13 @@
+import { useEffect, useState } from 'react'
+import { listenForLikes } from 'web/lib/firebase/users'
+import { Like } from 'common/like'
+
+export const useUserLikes = (userId: string | undefined) => {
+  const [contractIds, setContractIds] = useState<Like[] | undefined>()
+
+  useEffect(() => {
+    if (userId) return listenForLikes(userId, setContractIds)
+  }, [userId])
+
+  return contractIds
+}

web/hooks/use-notifications.ts

@@ -67,7 +67,13 @@ export function groupNotifications(notifications: Notification[]) {
   const notificationGroupsByDay = groupBy(notifications, (notification) =>
     new Date(notification.createdTime).toDateString()
   )
-  const incomeSourceTypes = ['bonus', 'tip', 'loan', 'betting_streak_bonus']
+  const incomeSourceTypes = [
+    'bonus',
+    'tip',
+    'loan',
+    'betting_streak_bonus',
+    'tip_and_like',
+  ]
 
   Object.keys(notificationGroupsByDay).forEach((day) => {
     const notificationsGroupedByDay = notificationGroupsByDay[day]

web/lib/firebase/users.ts

@@ -27,6 +27,7 @@ import utc from 'dayjs/plugin/utc'
 dayjs.extend(utc)
 
 import { track } from '@amplitude/analytics-browser'
+import { Like } from 'common/like'
 
 export const users = coll<User>('users')
 export const privateUsers = coll<PrivateUser>('private-users')
@@ -310,3 +311,11 @@ export function listenForReferrals(
     }
   )
 }
+
+export function listenForLikes(
+  userId: string,
+  setLikes: (likes: Like[]) => void
+) {
+  const likes = collection(users, userId, 'likes')
+  return listenForValues<Like>(likes, (docs) => setLikes(docs))
+}

web/pages/notifications.tsx

@@ -401,6 +401,10 @@ function IncomeNotificationItem(props: {
       reasonText = 'for your'
     } else if (sourceType === 'loan' && sourceText) {
       reasonText = `of your invested bets returned as a`
+      // TODO: support just 'like' notification without a tip
+      // TODO: show who tip-liked your market
+    } else if (sourceType === 'tip_and_like' && sourceText) {
+      reasonText = `in likes on`
     }
 
     const streakInDays =