From 1636786af89426ca545ed4baf873190b68bb06df Mon Sep 17 00:00:00 2001
From: Charles Bachmeier <charles@bachmeier.io>
Date: Wed, 17 Aug 2022 11:24:56 -0700
Subject: [PATCH] feat: add the phase0 chain switcher (#4376)

* feat: add phase0 chain switcher

* update styles

* add chain switcher files

* remove unneeded eslint disable

* add Celo and remove unneeded null check

* remove old comment

* fix mobile routing

Co-authored-by: Charles Bachmeier <charlie@genie.xyz>
---
 src/components/NavBar/ChainSwitcher.css.ts |  49 ++++++++++
 src/components/NavBar/ChainSwitcher.tsx    | 108 +++++++++++++++++++++
 src/components/NavBar/MobileSidebar.tsx    |   2 +-
 src/components/NavBar/Navbar.tsx           |   5 +-
 4 files changed, 161 insertions(+), 3 deletions(-)
 create mode 100644 src/components/NavBar/ChainSwitcher.css.ts
 create mode 100644 src/components/NavBar/ChainSwitcher.tsx

diff --git a/src/components/NavBar/ChainSwitcher.css.ts b/src/components/NavBar/ChainSwitcher.css.ts
new file mode 100644
index 0000000000..0deb2c5da9
--- /dev/null
+++ b/src/components/NavBar/ChainSwitcher.css.ts
@@ -0,0 +1,49 @@
+import { style } from '@vanilla-extract/css'
+
+import { sprinkles } from '../../nft/css/sprinkles.css'
+
+export const ChainSwitcher = style([
+  sprinkles({
+    background: 'lightGrayContainer',
+    borderRadius: '8',
+    paddingY: '8',
+    paddingX: '12',
+    cursor: 'pointer',
+    border: 'none',
+  }),
+])
+
+export const ChainSwitcherRow = style([
+  sprinkles({
+    border: 'none',
+    color: 'blackBlue',
+    justifyContent: 'space-between',
+    paddingX: '16',
+    paddingY: '12',
+    cursor: 'pointer',
+  }),
+  {
+    lineHeight: '24px',
+    width: '308px',
+  },
+])
+
+export const Image = style([
+  sprinkles({
+    width: '28',
+    height: '28',
+  }),
+])
+
+export const Icon = style([
+  Image,
+  sprinkles({
+    marginRight: '12',
+  }),
+])
+
+export const Indicator = style([
+  sprinkles({
+    marginLeft: '8',
+  }),
+])
diff --git a/src/components/NavBar/ChainSwitcher.tsx b/src/components/NavBar/ChainSwitcher.tsx
new file mode 100644
index 0000000000..487e0413a1
--- /dev/null
+++ b/src/components/NavBar/ChainSwitcher.tsx
@@ -0,0 +1,108 @@
+import { useWeb3React } from '@web3-react/core'
+import { getChainInfo } from 'constants/chainInfo'
+import { SupportedChainId } from 'constants/chains'
+import { useOnClickOutside } from 'hooks/useOnClickOutside'
+import useSelectChain from 'hooks/useSelectChain'
+import useSyncChainQuery from 'hooks/useSyncChainQuery'
+import { Box } from 'nft/components/Box'
+import { Column, Row } from 'nft/components/Flex'
+import { NewChevronDownIcon, NewChevronUpIcon } from 'nft/components/icons'
+import { CheckMarkIcon } from 'nft/components/icons'
+import { subhead } from 'nft/css/common.css'
+import { ReactNode, useReducer, useRef } from 'react'
+import { isChainAllowed } from 'utils/switchChain'
+
+import * as styles from './ChainSwitcher.css'
+import { NavDropdown } from './NavDropdown'
+
+const ChainRow = ({
+  targetChain,
+  onSelectChain,
+}: {
+  targetChain: SupportedChainId
+  onSelectChain: (targetChain: number) => void
+}) => {
+  const { chainId } = useWeb3React()
+  const active = chainId === targetChain
+  const { label, logoUrl } = getChainInfo(targetChain)
+
+  return (
+    <Row
+      as="button"
+      background={active ? 'lightGrayContainer' : 'none'}
+      className={`${styles.ChainSwitcherRow} ${subhead}`}
+      onClick={() => onSelectChain(targetChain)}
+    >
+      <ChainDetails>
+        <img src={logoUrl} alt={label} className={styles.Icon} />
+        {label}
+      </ChainDetails>
+      {active && <CheckMarkIcon width={20} height={20} />}
+    </Row>
+  )
+}
+
+const ChainDetails = ({ children }: { children: ReactNode }) => <Row>{children}</Row>
+
+const NETWORK_SELECTOR_CHAINS = [
+  SupportedChainId.MAINNET,
+  SupportedChainId.POLYGON,
+  SupportedChainId.OPTIMISM,
+  SupportedChainId.ARBITRUM_ONE,
+  SupportedChainId.CELO,
+]
+
+interface ChainSwitcherProps {
+  isMobile?: boolean
+}
+
+export const ChainSwitcher = ({ isMobile }: ChainSwitcherProps) => {
+  const { chainId, connector } = useWeb3React()
+  const [isOpen, toggleOpen] = useReducer((s) => !s, false)
+
+  const ref = useRef<HTMLDivElement>(null)
+  useOnClickOutside(ref, isOpen ? toggleOpen : undefined)
+
+  const info = chainId ? getChainInfo(chainId) : undefined
+
+  const selectChain = useSelectChain()
+  useSyncChainQuery()
+
+  if (!chainId || !info) {
+    return null
+  }
+
+  return (
+    <Box position="relative" ref={ref}>
+      <Row as="button" gap="8" className={styles.ChainSwitcher} onClick={toggleOpen}>
+        <img src={info.logoUrl} alt={info.label} className={styles.Image} />
+        <Box as="span" className={subhead} color="explicitWhite" style={{ lineHeight: '20px' }}>
+          {info.label}
+        </Box>
+        {isOpen ? (
+          <NewChevronUpIcon width={16} height={16} color="darkGray" />
+        ) : (
+          <NewChevronDownIcon width={16} height={16} color="darkGray" />
+        )}
+      </Row>
+      {isOpen && (
+        <NavDropdown top={60} leftAligned={isMobile}>
+          <Column gap="4">
+            {NETWORK_SELECTOR_CHAINS.map((chainId: SupportedChainId) =>
+              isChainAllowed(connector, chainId) ? (
+                <ChainRow
+                  onSelectChain={async (targetChainId: SupportedChainId) => {
+                    await selectChain(targetChainId)
+                    toggleOpen()
+                  }}
+                  targetChain={chainId}
+                  key={chainId}
+                />
+              ) : null
+            )}
+          </Column>
+        </NavDropdown>
+      )}
+    </Box>
+  )
+}
diff --git a/src/components/NavBar/MobileSidebar.tsx b/src/components/NavBar/MobileSidebar.tsx
index 79ec4ac6d5..3f91df8b9e 100644
--- a/src/components/NavBar/MobileSidebar.tsx
+++ b/src/components/NavBar/MobileSidebar.tsx
@@ -159,7 +159,7 @@ export const MobileSideBar = () => {
                 <NavLinkRow href="/swap" close={toggleOpen} isActive={pathname.startsWith('/swap')}>
                   Swap
                 </NavLinkRow>
-                <NavLinkRow href="/explore" close={toggleOpen} isActive={pathname.startsWith('/explore')}>
+                <NavLinkRow href="/tokens" close={toggleOpen} isActive={pathname.startsWith('/tokens')}>
                   Tokens
                 </NavLinkRow>
                 <NavLinkRow href="/pool" id={'pool-nav-link'} isActive={isPoolActive} close={toggleOpen}>
diff --git a/src/components/NavBar/Navbar.tsx b/src/components/NavBar/Navbar.tsx
index 45755bbf3e..e4ddcd02e2 100644
--- a/src/components/NavBar/Navbar.tsx
+++ b/src/components/NavBar/Navbar.tsx
@@ -7,6 +7,7 @@ import { Box } from '../../nft/components/Box'
 import { Row } from '../../nft/components/Flex'
 import { UniIcon, UniIconMobile } from '../../nft/components/icons'
 import { breakpoints } from '../../nft/css/sprinkles.css'
+import { ChainSwitcher } from './ChainSwitcher'
 import { MenuDropdown } from './MenuDropdown'
 import { MobileSideBar } from './MobileSidebar'
 import * as styles from './Navbar.css'
@@ -40,7 +41,7 @@ const MobileNavbar = () => {
             <Box as="a" href="#/swap" className={styles.logoContainer}>
               <UniIconMobile width="44" height="44" className={styles.logo} />
             </Box>
-            {/* TODO add ChainSwitcher */}
+            <ChainSwitcher isMobile={true} />
           </Box>
           <Box className={styles.rightSideMobileContainer}>
             <Row gap="16">
@@ -95,7 +96,7 @@ const Navbar = () => {
         <Box className={styles.rightSideContainer}>
           <Row gap="12">
             <MenuDropdown />
-            {/* TODO add ChainSwitcher */}
+            <ChainSwitcher />
             <Web3Status />
           </Row>
         </Box>