refactor: split out SearchBarDropdown (#4744)

refactor: split out SearchBarDropdown.tsx

src/components/NavBar/SearchBarDropdown.tsx

+import { Trans } from '@lingui/macro'
+import { NftVariant, useNftFlag } from 'featureFlags/flags/nft'
+import { Box } from 'nft/components/Box'
+import { Column, Row } from 'nft/components/Flex'
+import { subheadSmall } from 'nft/css/common.css'
+import { useSearchHistory } from 'nft/hooks'
+import { fetchTrendingCollections } from 'nft/queries'
+import { fetchTrendingTokens } from 'nft/queries/genie/TrendingTokensFetcher'
+import { FungibleToken, GenieCollection, TimePeriod, TrendingCollection } from 'nft/types'
+import { formatEthPrice } from 'nft/utils/currency'
+import { ReactNode, useEffect, useMemo, useState } from 'react'
+import { useQuery } from 'react-query'
+import { useLocation } from 'react-router-dom'
+
+import { ClockIcon, TrendingArrow } from '../../nft/components/icons'
+import * as styles from './SearchBar.css'
+import { CollectionRow, SkeletonRow, TokenRow } from './SuggestionRow'
+
+function isCollection(suggestion: GenieCollection | FungibleToken | TrendingCollection) {
+  return (suggestion as FungibleToken).decimals === undefined
+}
+
+interface SearchBarDropdownSectionProps {
+  toggleOpen: () => void
+  suggestions: (GenieCollection | FungibleToken)[]
+  header: JSX.Element
+  headerIcon?: JSX.Element
+  hoveredIndex: number | undefined
+  startingIndex: number
+  setHoveredIndex: (index: number | undefined) => void
+  isLoading?: boolean
+}
+
+export const SearchBarDropdownSection = ({
+  toggleOpen,
+  suggestions,
+  header,
+  headerIcon = undefined,
+  hoveredIndex,
+  startingIndex,
+  setHoveredIndex,
+  isLoading,
+}: SearchBarDropdownSectionProps) => {
+  return (
+    <Column gap="12">
+      <Row paddingX="16" paddingY="4" gap="8" color="grey300" className={subheadSmall} style={{ lineHeight: '20px' }}>
+        {headerIcon ? headerIcon : null}
+        <Box>{header}</Box>
+      </Row>
+      <Column gap="12">
+        {suggestions.map((suggestion, index) =>
+          isLoading ? (
+            <SkeletonRow key={index} />
+          ) : isCollection(suggestion) ? (
+            <CollectionRow
+              key={suggestion.address}
+              collection={suggestion as GenieCollection}
+              isHovered={hoveredIndex === index + startingIndex}
+              setHoveredIndex={setHoveredIndex}
+              toggleOpen={toggleOpen}
+              index={index + startingIndex}
+            />
+          ) : (
+            <TokenRow
+              key={suggestion.address}
+              token={suggestion as FungibleToken}
+              isHovered={hoveredIndex === index + startingIndex}
+              setHoveredIndex={setHoveredIndex}
+              toggleOpen={toggleOpen}
+              index={index + startingIndex}
+            />
+          )
+        )}
+      </Column>
+    </Column>
+  )
+}
+
+interface SearchBarDropdownProps {
+  toggleOpen: () => void
+  tokens: FungibleToken[]
+  collections: GenieCollection[]
+  hasInput: boolean
+  isLoading: boolean
+}
+
+export const SearchBarDropdown = ({ toggleOpen, tokens, collections, hasInput, isLoading }: SearchBarDropdownProps) => {
+  const [hoveredIndex, setHoveredIndex] = useState<number | undefined>(0)
+  const searchHistory = useSearchHistory((state: { history: (FungibleToken | GenieCollection)[] }) => state.history)
+  const shortenedHistory = useMemo(() => searchHistory.slice(0, 2), [searchHistory])
+  const { pathname } = useLocation()
+  const isNFTPage = pathname.includes('/nfts')
+  const isTokenPage = pathname.includes('/tokens')
+  const phase1Flag = useNftFlag()
+  const [resultsState, setResultsState] = useState<ReactNode>()
+
+  const tokenSearchResults =
+    tokens.length > 0 ? (
+      <SearchBarDropdownSection
+        hoveredIndex={hoveredIndex}
+        startingIndex={isNFTPage ? collections.length : 0}
+        setHoveredIndex={setHoveredIndex}
+        toggleOpen={toggleOpen}
+        suggestions={tokens}
+        header={<Trans>Tokens</Trans>}
+      />
+    ) : (
+      <Box className={styles.notFoundContainer}>
+        <Trans>No tokens found.</Trans>
+      </Box>
+    )
+
+  const collectionSearchResults =
+    phase1Flag === NftVariant.Enabled ? (
+      collections.length > 0 ? (
+        <SearchBarDropdownSection
+          hoveredIndex={hoveredIndex}
+          startingIndex={isNFTPage ? 0 : tokens.length}
+          setHoveredIndex={setHoveredIndex}
+          toggleOpen={toggleOpen}
+          suggestions={collections}
+          header={<Trans>NFT Collections</Trans>}
+        />
+      ) : (
+        <Box className={styles.notFoundContainer}>No NFT collections found.</Box>
+      )
+    ) : null
+
+  const { data: trendingCollectionResults, isLoading: trendingCollectionsAreLoading } = useQuery(
+    ['trendingCollections', 'eth', 'twenty_four_hours'],
+    () => fetchTrendingCollections({ volumeType: 'eth', timePeriod: 'ONE_DAY' as TimePeriod, size: 3 })
+  )
+
+  const trendingCollections = useMemo(
+    () =>
+      trendingCollectionResults
+        ? trendingCollectionResults
+            .map((collection) => ({
+              ...collection,
+              collectionAddress: collection.address,
+              floorPrice: formatEthPrice(collection.floor?.toString()),
+              stats: {
+                total_supply: collection.totalSupply,
+                one_day_change: collection.floorChange,
+              },
+            }))
+            .slice(0, isNFTPage ? 3 : 2)
+        : [...Array<GenieCollection>(isNFTPage ? 3 : 2)],
+    [isNFTPage, trendingCollectionResults]
+  )
+
+  const { data: trendingTokenResults, isLoading: trendingTokensAreLoading } = useQuery(
+    ['trendingTokens'],
+    () => fetchTrendingTokens(4),
+    {
+      refetchOnWindowFocus: false,
+      refetchOnMount: false,
+      refetchOnReconnect: false,
+    }
+  )
+
+  const trendingTokensLength = phase1Flag === NftVariant.Enabled ? (isTokenPage ? 3 : 2) : 4
+
+  const trendingTokens = useMemo(
+    () =>
+      trendingTokenResults
+        ? trendingTokenResults.slice(0, trendingTokensLength)
+        : [...Array<FungibleToken>(trendingTokensLength)],
+    [trendingTokenResults, trendingTokensLength]
+  )
+
+  const totalSuggestions = hasInput
+    ? tokens.length + collections.length
+    : Math.min(shortenedHistory.length, 2) +
+      (isNFTPage || !isTokenPage ? trendingCollections?.length ?? 0 : 0) +
+      (isTokenPage || !isNFTPage ? trendingTokens?.length ?? 0 : 0)
+
+  // Navigate search results via arrow keys
+  useEffect(() => {
+    const keyDownHandler = (event: KeyboardEvent) => {
+      if (event.key === 'ArrowUp') {
+        event.preventDefault()
+        if (!hoveredIndex) {
+          setHoveredIndex(totalSuggestions - 1)
+        } else {
+          setHoveredIndex(hoveredIndex - 1)
+        }
+      } else if (event.key === 'ArrowDown') {
+        event.preventDefault()
+        if (hoveredIndex && hoveredIndex === totalSuggestions - 1) {
+          setHoveredIndex(0)
+        } else {
+          setHoveredIndex((hoveredIndex ?? -1) + 1)
+        }
+      }
+    }
+
+    document.addEventListener('keydown', keyDownHandler)
+
+    return () => {
+      document.removeEventListener('keydown', keyDownHandler)
+    }
+  }, [toggleOpen, hoveredIndex, totalSuggestions])
+
+  useEffect(() => {
+    if (!isLoading) {
+      const currentState = () =>
+        hasInput ? (
+          // Empty or Up to 8 combined tokens and nfts
+          <Column gap="20">
+            {isNFTPage ? (
+              <>
+                {collectionSearchResults}
+                {tokenSearchResults}
+              </>
+            ) : (
+              <>
+                {tokenSearchResults}
+                {collectionSearchResults}
+              </>
+            )}
+          </Column>
+        ) : (
+          // Recent Searches, Trending Tokens, Trending Collections
+          <Column gap="20">
+            {shortenedHistory.length > 0 && (
+              <SearchBarDropdownSection
+                hoveredIndex={hoveredIndex}
+                startingIndex={0}
+                setHoveredIndex={setHoveredIndex}
+                toggleOpen={toggleOpen}
+                suggestions={shortenedHistory}
+                header={<Trans>Recent searches</Trans>}
+                headerIcon={<ClockIcon />}
+              />
+            )}
+            {!isNFTPage && (
+              <SearchBarDropdownSection
+                hoveredIndex={hoveredIndex}
+                startingIndex={shortenedHistory.length}
+                setHoveredIndex={setHoveredIndex}
+                toggleOpen={toggleOpen}
+                suggestions={trendingTokens}
+                header={<Trans>Popular tokens</Trans>}
+                headerIcon={<TrendingArrow />}
+                isLoading={trendingTokensAreLoading}
+              />
+            )}
+            {!isTokenPage && phase1Flag === NftVariant.Enabled && (
+              <SearchBarDropdownSection
+                hoveredIndex={hoveredIndex}
+                startingIndex={shortenedHistory.length + (isNFTPage ? 0 : trendingTokens?.length ?? 0)}
+                setHoveredIndex={setHoveredIndex}
+                toggleOpen={toggleOpen}
+                suggestions={trendingCollections as unknown as GenieCollection[]}
+                header={<Trans>Popular NFT collections</Trans>}
+                headerIcon={<TrendingArrow />}
+                isLoading={trendingCollectionsAreLoading}
+              />
+            )}
+          </Column>
+        )
+
+      setResultsState(currentState)
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [
+    isLoading,
+    tokens,
+    collections,
+    trendingCollections,
+    trendingCollectionsAreLoading,
+    trendingTokens,
+    trendingTokensAreLoading,
+    hoveredIndex,
+    phase1Flag,
+    toggleOpen,
+    shortenedHistory,
+    hasInput,
+    isNFTPage,
+    isTokenPage,
+  ])
+
+  return (
+    <Box className={styles.searchBarDropdown}>
+      <Box opacity={isLoading ? '0.3' : '1'} transition="125">
+        {resultsState}
+      </Box>
+    </Box>
+  )
+}