Implement double carousel for /experimental/home

web/components/carousel.tsx

@@ -0,0 +1,60 @@
+import { ChevronLeftIcon, ChevronRightIcon } from '@heroicons/react/solid'
+import clsx from 'clsx'
+import { throttle } from 'lodash'
+import { ReactNode, useRef, useState, useEffect } from 'react'
+import { Row } from './layout/row'
+
+export function Carousel(props: { children: ReactNode; className?: string }) {
+  const { children, className } = props
+
+  const ref = useRef<HTMLDivElement>(null)
+
+  const th = (f: () => any) => throttle(f, 500, { trailing: false })
+  const scrollLeft = th(() =>
+    ref.current?.scrollBy({ left: -ref.current.clientWidth })
+  )
+  const scrollRight = th(() =>
+    ref.current?.scrollBy({ left: ref.current.clientWidth })
+  )
+
+  const [atFront, setAtFront] = useState(true)
+  const [atBack, setAtBack] = useState(false)
+  const onScroll = throttle(() => {
+    if (ref.current) {
+      const { scrollLeft, clientWidth, scrollWidth } = ref.current
+      setAtFront(scrollLeft < 80)
+      setAtBack(scrollWidth - (clientWidth + scrollLeft) < 80)
+    }
+  }, 500)
+
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  useEffect(onScroll, [])
+
+  return (
+    <div className={clsx('relative', className)}>
+      <Row
+        className="scrollbar-hide w-full gap-4 overflow-x-auto scroll-smooth"
+        ref={ref}
+        onScroll={onScroll}
+      >
+        {children}
+      </Row>
+      {!atFront && (
+        <div
+          className="absolute left-0 top-0 bottom-0 z-10 flex w-10 cursor-pointer items-center justify-center hover:bg-indigo-100/30"
+          onMouseDown={scrollLeft}
+        >
+          <ChevronLeftIcon className="h-7 w-7 rounded-full bg-indigo-50 text-indigo-700" />
+        </div>
+      )}
+      {!atBack && (
+        <div
+          className="absolute right-0 top-0 bottom-0 z-10 flex w-10 cursor-pointer items-center justify-center hover:bg-indigo-100/30"
+          onMouseDown={scrollRight}
+        >
+          <ChevronRightIcon className="h-7 w-7 rounded-full bg-indigo-50 text-indigo-700" />
+        </div>
+      )}
+    </div>
+  )
+}

web/components/contract-search.tsx

@@ -10,7 +10,7 @@ import {
 } from './contract/contracts-grid'
 import { ShowTime } from './contract/contract-details'
 import { Row } from './layout/row'
-import { useEffect, useLayoutEffect, useRef, useMemo } from 'react'
+import { useEffect, useLayoutEffect, useRef, useMemo, ReactNode } from 'react'
 import { ENV, IS_PRIVATE_MANIFOLD } from 'common/envs/constants'
 import { useFollows } from 'web/hooks/use-follows'
 import {
@@ -85,6 +85,7 @@ export function ContractSearch(props: {
   isWholePage?: boolean
   maxItems?: number
   noControls?: boolean
+  renderContracts?: (contracts: Contract[] | undefined) => ReactNode
 }) {
   const {
     user,
@@ -101,6 +102,7 @@ export function ContractSearch(props: {
     isWholePage,
     maxItems,
     noControls,
+    renderContracts,
   } = props
 
   const [state, setState] = usePersistentState(
@@ -203,14 +205,18 @@ export function ContractSearch(props: {
         onSearchParametersChanged={onSearchParametersChanged}
         noControls={noControls}
       />
-      <ContractsGrid
-        contracts={renderedContracts}
-        loadMore={noControls ? undefined : performQuery}
-        showTime={state.showTime ?? undefined}
-        onContractClick={onContractClick}
-        highlightOptions={highlightOptions}
-        cardHideOptions={cardHideOptions}
-      />
+      {renderContracts ? (
+        renderContracts(renderedContracts)
+      ) : (
+        <ContractsGrid
+          contracts={renderedContracts}
+          loadMore={noControls ? undefined : performQuery}
+          showTime={state.showTime ?? undefined}
+          onContractClick={onContractClick}
+          highlightOptions={highlightOptions}
+          cardHideOptions={cardHideOptions}
+        />
+      )}
     </Col>
   )
 }

web/pages/experimental/home.tsx

@@ -1,5 +1,5 @@
 import React from 'react'
-import { useRouter } from 'next/router'
+import Router from 'next/router'
 import { PlusSmIcon } from '@heroicons/react/solid'
 
 import { Page } from 'web/components/page'
@@ -17,7 +17,13 @@ import { Button } from 'web/components/button'
 import { Spacer } from 'web/components/layout/spacer'
 import { useMemberGroups } from 'web/hooks/use-group'
 import { Group } from 'common/group'
-import { Title } from 'web/components/title'
+import { Carousel } from 'web/components/carousel'
+import { LoadingIndicator } from 'web/components/loading-indicator'
+import { ContractCard } from 'web/components/contract/contract-card'
+import { range } from 'lodash'
+import { Subtitle } from 'web/components/subtitle'
+import { Contract } from 'common/contract'
+import { ShowTime } from 'web/components/contract/contract-details'
 
 export const getServerSideProps: GetServerSideProps = async (ctx) => {
   const creds = await authenticateOnServer(ctx)
@@ -28,7 +34,6 @@ export const getServerSideProps: GetServerSideProps = async (ctx) => {
 const Home = (props: { auth: { user: User } | null }) => {
   const user = props.auth ? props.auth.user : null
 
-  const router = useRouter()
   useTracking('view home')
 
   useSaveReferral()
@@ -39,7 +44,7 @@ const Home = (props: { auth: { user: User } | null }) => {
 
   return (
     <Page>
-      <Col className="mx-auto mb-8 w-full">
+      <Col className="mx-4 mt-4 gap-2 sm:mx-10 xl:w-[125%]">
         <SearchSection label="Trending" sort="score" user={user} />
         <SearchSection label="Newest" sort="newest" user={user} />
         <SearchSection label="Closing soon" sort="close-date" user={user} />
@@ -51,7 +56,7 @@ const Home = (props: { auth: { user: User } | null }) => {
         type="button"
         className="fixed bottom-[70px] right-3 inline-flex items-center rounded-full border border-transparent bg-indigo-600 p-3 text-white shadow-sm hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:ring-offset-2 lg:hidden"
         onClick={() => {
-          router.push('/create')
+          Router.push('/create')
           track('mobile create button')
         }}
       >
@@ -68,21 +73,25 @@ function SearchSection(props: {
 }) {
   const { label, user, sort } = props
 
-  const router = useRouter()
-
   return (
     <Col>
-      <Title className="mx-2 !text-gray-800 sm:mx-0" text={label} />
-      <Spacer h={2} />
-      <ContractSearch user={user} defaultSort={sort} maxItems={4} noControls />
-      <Button
-        className="self-end"
-        color="blue"
-        size="sm"
-        onClick={() => router.push(`/home?s=${sort}`)}
-      >
-        See more
-      </Button>
+      <Subtitle className="mx-2 !mt-2 !text-gray-800 sm:mx-0" text={label} />
+      <ContractSearch
+        user={user}
+        defaultSort={sort}
+        maxItems={12}
+        noControls
+        renderContracts={(contracts) =>
+          contracts ? (
+            <DoubleCarousel
+              contracts={contracts}
+              seeMoreUrl={`/home?s=${sort}`}
+            />
+          ) : (
+            <LoadingIndicator />
+          )
+        }
+      />
     </Col>
   )
 }
@@ -90,29 +99,74 @@ function SearchSection(props: {
 function GroupSection(props: { group: Group; user: User | null }) {
   const { group, user } = props
 
-  const router = useRouter()
-
   return (
     <Col className="">
-      <Title className="mx-2 !text-gray-800 sm:mx-0" text={group.name} />
+      <Subtitle className="mx-2 !text-gray-800 sm:mx-0" text={group.name} />
       <Spacer h={2} />
       <ContractSearch
         user={user}
         defaultSort={'score'}
         additionalFilter={{ groupSlug: group.slug }}
-        maxItems={4}
+        maxItems={12}
         noControls
+        renderContracts={(contracts) =>
+          contracts ? (
+            <DoubleCarousel
+              contracts={contracts}
+              seeMoreUrl={`/group/${group.slug}`}
+            />
+          ) : (
+            <LoadingIndicator />
+          )
+        }
       />
-      <Button
-        className="mr-2 self-end"
-        color="blue"
-        size="sm"
-        onClick={() => router.push(`/group/${group.slug}`)}
-      >
-        See more
-      </Button>
     </Col>
   )
 }
 
+function DoubleCarousel(props: {
+  contracts: Contract[]
+  seeMoreUrl?: string
+  showTime?: ShowTime
+}) {
+  const { contracts, seeMoreUrl, showTime } = props
+  return (
+    <Carousel className="-mx-4 mt-2 sm:-mx-10">
+      <div className="shrink-0 sm:w-6" />
+      {contracts &&
+        range(0, Math.floor(contracts.length / 2)).map((col) => {
+          const i = col * 2
+          return (
+            <Col>
+              <ContractCard
+                key={contracts[i].id}
+                contract={contracts[i]}
+                className="mb-2 max-h-[200px] w-96 shrink-0"
+                questionClass="line-clamp-3"
+                trackingPostfix=" tournament"
+                showTime={showTime}
+              />
+              <ContractCard
+                key={contracts[i + 1].id}
+                contract={contracts[i + 1]}
+                className="mb-2 max-h-[200px] w-96 shrink-0"
+                questionClass="line-clamp-3"
+                trackingPostfix=" tournament"
+                showTime={showTime}
+              />
+            </Col>
+          )
+        })}
+      <Button
+        className="self-center whitespace-nowrap"
+        color="blue"
+        size="sm"
+        onClick={() => seeMoreUrl && Router.push(seeMoreUrl)}
+      >
+        See more
+      </Button>
+    </Carousel>
+  )
+}
+
 export default Home

web/pages/tournaments/index.tsx

@@ -1,10 +1,5 @@
 import { ClockIcon } from '@heroicons/react/outline'
-import {
-  ChevronLeftIcon,
-  ChevronRightIcon,
-  UsersIcon,
-} from '@heroicons/react/solid'
-import clsx from 'clsx'
+import { UsersIcon } from '@heroicons/react/solid'
 import {
   BinaryContract,
   Contract,
@@ -15,10 +10,10 @@ import dayjs, { Dayjs } from 'dayjs'
 import customParseFormat from 'dayjs/plugin/customParseFormat'
 import timezone from 'dayjs/plugin/timezone'
 import utc from 'dayjs/plugin/utc'
-import { keyBy, mapValues, sortBy, throttle } from 'lodash'
+import { keyBy, mapValues, sortBy } from 'lodash'
 import Image, { ImageProps, StaticImageData } from 'next/image'
 import Link from 'next/link'
-import { ReactNode, useEffect, useRef, useState } from 'react'
+import { useState } from 'react'
 import { ContractCard } from 'web/components/contract/contract-card'
 import { DateTimeTooltip } from 'web/components/datetime-tooltip'
 import { Col } from 'web/components/layout/col'
@@ -33,6 +28,7 @@ import mpox_pic from './_cspi/Monkeypox_Cases.png'
 import race_pic from './_cspi/Supreme_Court_Ban_Race_in_College_Admissions.png'
 import { SiteLink } from 'web/components/site-link'
 import { getProbability } from 'common/calculate'
+import { Carousel } from 'web/components/carousel'
 
 dayjs.extend(utc)
 dayjs.extend(timezone)
@@ -254,58 +250,3 @@ const NaturalImage = (props: ImageProps) => {
     />
   )
 }
-
-function Carousel(props: { children: ReactNode; className?: string }) {
-  const { children, className } = props
-
-  const ref = useRef<HTMLDivElement>(null)
-
-  const th = (f: () => any) => throttle(f, 500, { trailing: false })
-  const scrollLeft = th(() =>
-    ref.current?.scrollBy({ left: -ref.current.clientWidth })
-  )
-  const scrollRight = th(() =>
-    ref.current?.scrollBy({ left: ref.current.clientWidth })
-  )
-
-  const [atFront, setAtFront] = useState(true)
-  const [atBack, setAtBack] = useState(false)
-  const onScroll = throttle(() => {
-    if (ref.current) {
-      const { scrollLeft, clientWidth, scrollWidth } = ref.current
-      setAtFront(scrollLeft < 80)
-      setAtBack(scrollWidth - (clientWidth + scrollLeft) < 80)
-    }
-  }, 500)
-
-  // eslint-disable-next-line react-hooks/exhaustive-deps
-  useEffect(onScroll, [])
-
-  return (
-    <div className={clsx('relative', className)}>
-      <Row
-        className="scrollbar-hide w-full gap-4 overflow-x-auto scroll-smooth"
-        ref={ref}
-        onScroll={onScroll}
-      >
-        {children}
-      </Row>
-      {!atFront && (
-        <div
-          className="absolute left-0 top-0 bottom-0 z-10 flex w-10 cursor-pointer items-center justify-center hover:bg-indigo-100/30"
-          onMouseDown={scrollLeft}
-        >
-          <ChevronLeftIcon className="h-7 w-7 rounded-full bg-indigo-50 text-indigo-700" />
-        </div>
-      )}
-      {!atBack && (
-        <div
-          className="absolute right-0 top-0 bottom-0 z-10 flex w-10 cursor-pointer items-center justify-center hover:bg-indigo-100/30"
-          onMouseDown={scrollRight}
-        >
-          <ChevronRightIcon className="h-7 w-7 rounded-full bg-indigo-50 text-indigo-700" />
-        </div>
-      )}
-    </div>
-  )
-}