fix: cache with duplicated data

components/Application/Channels/Channel.tsx

@@ -1,3 +1,4 @@
+import { memo } from 'react'
 import classNames from 'clsx'
 import Link from 'next/link'
 import { useRouter } from 'next/router'
@@ -14,7 +15,7 @@ export interface ChannelProps {
   selected?: boolean
 }
 
-export const Channel: React.FC<ChannelProps> = (props) => {
+const ChannelMemo: React.FC<ChannelProps> = (props) => {
   const { channel, path, selected = false } = props
   const router = useRouter()
 
@@ -53,3 +54,5 @@ export const Channel: React.FC<ChannelProps> = (props) => {
     </Link>
   )
 }
+
+export const Channel = memo(ChannelMemo)

components/Application/Guilds/Guild.tsx

@@ -1,3 +1,4 @@
+import { memo } from 'react'
 import Image from 'next/image'
 
 import { GuildWithDefaultChannelId } from '../../../models/Guild'
@@ -8,7 +9,7 @@ export interface GuildProps {
   selected?: boolean
 }
 
-export const Guild: React.FC<GuildProps> = (props) => {
+const GuildMemo: React.FC<GuildProps> = (props) => {
   const { guild, selected } = props
 
   return (
@@ -34,3 +35,5 @@ export const Guild: React.FC<GuildProps> = (props) => {
     </IconLink>
   )
 }
+
+export const Guild = memo(GuildMemo)

components/Application/Members/Member.tsx

@@ -1,3 +1,4 @@
+import { memo } from 'react'
 import Image from 'next/image'
 import Link from 'next/link'
 
@@ -8,7 +9,7 @@ export interface MemberProps {
   member: MemberWithPublicUser
 }
 
-export const Member: React.FC<MemberProps> = (props) => {
+const MemberMemo: React.FC<MemberProps> = (props) => {
   const { member } = props
 
   return (
@@ -45,3 +46,5 @@ export const Member: React.FC<MemberProps> = (props) => {
     </Link>
   )
 }
+
+export const Member = memo(MemberMemo)

contexts/Channels.tsx

@@ -1,4 +1,4 @@
-import { createContext, useContext, useEffect } from 'react'
+import { createContext, useContext, useEffect, useMemo } from 'react'
 import { useRouter } from 'next/router'
 
 import { NextPage, usePagination } from '../hooks/usePagination'
@@ -28,7 +28,9 @@ export const ChannelsProvider: React.FC<
   const router = useRouter()
   const { authentication } = useAuthentication()
 
-  const cacheKey: CacheKey = `${path.guildId}-${CHANNELS_CACHE_KEY}`
+  const cacheKey = useMemo<CacheKey>(() => {
+    return `${path.guildId}-${CHANNELS_CACHE_KEY}`
+  }, [path.guildId])
 
   const {
     items: channels,
@@ -75,7 +77,7 @@ export const ChannelsProvider: React.FC<
 export const useChannels = (): Channels => {
   const channels = useContext(ChannelsContext)
   if (channels === defaultChannelsContext) {
-    throw new Error('useChannels must be used within ChannelsProvider')
+    throw new Error('`useChannels` must be used within `ChannelsProvider`')
   }
   return channels
 }

contexts/GuildMember.tsx

@@ -11,9 +11,7 @@ export interface GuildMember {
   member: Member
 }
 
-export interface GuildMemberResult extends GuildMember {
-  setGuildMember: React.Dispatch<React.SetStateAction<GuildMember>>
-}
+export interface GuildMemberResult extends GuildMember {}
 
 export interface GuildMemberProps {
   guildMember: GuildMember
@@ -79,8 +77,7 @@ export const GuildMemberProvider: React.FC<
   return (
     <GuildMemberContext.Provider
       value={{
-        ...guildMember,
-        setGuildMember
+        ...guildMember
       }}
     >
       {children}
@@ -91,7 +88,9 @@ export const GuildMemberProvider: React.FC<
 export const useGuildMember = (): GuildMemberResult => {
   const guildMember = useContext(GuildMemberContext)
   if (guildMember === defaultGuildMemberContext) {
-    throw new Error('useGuildMember must be used within GuildMemberProvider')
+    throw new Error(
+      '`useGuildMember` must be used within `GuildMemberProvider`'
+    )
   }
   return guildMember
 }

contexts/Guilds.tsx

@@ -62,7 +62,7 @@ export const GuildsProvider: React.FC<React.PropsWithChildren<{}>> = (
 export const useGuilds = (): Guilds => {
   const guilds = useContext(GuildsContext)
   if (guilds === defaultGuildsContext) {
-    throw new Error('useGuilds must be used within GuildsProvider')
+    throw new Error('`useGuilds` must be used within `GuildsProvider`')
   }
   return guilds
 }

contexts/Members.tsx

@@ -1,4 +1,4 @@
-import { createContext, useContext, useEffect } from 'react'
+import { createContext, useContext, useEffect, useMemo } from 'react'
 
 import { NextPage, usePagination } from '../hooks/usePagination'
 import { useAuthentication } from '../tools/authentication'
@@ -28,7 +28,9 @@ export const MembersProviders: React.FC<
 
   const { authentication } = useAuthentication()
 
-  const cacheKey: CacheKey = `${path.guildId}-${MEMBERS_CACHE_KEY}`
+  const cacheKey = useMemo<CacheKey>(() => {
+    return `${path.guildId}-${MEMBERS_CACHE_KEY}`
+  }, [path.guildId])
 
   const {
     items: members,
@@ -89,7 +91,7 @@ export const MembersProviders: React.FC<
 export const useMembers = (): Members => {
   const members = useContext(MembersContext)
   if (members === defaultMembersContext) {
-    throw new Error('useMembers must be used within MembersProvider')
+    throw new Error('`useMembers` must be used within `MembersProvider`')
   }
   return members
 }

contexts/Messages.tsx

@@ -1,4 +1,4 @@
-import { createContext, useContext, useEffect } from 'react'
+import { createContext, useContext, useEffect, useMemo } from 'react'
 
 import { NextPage, usePagination } from '../hooks/usePagination'
 import { useAuthentication } from '../tools/authentication'
@@ -26,7 +26,9 @@ export const MessagesProvider: React.FC<
   const { path, children } = props
   const { authentication, user } = useAuthentication()
 
-  const cacheKey: CacheKey = `${path.channelId}-${MESSAGES_CACHE_KEY}`
+  const cacheKey = useMemo<CacheKey>(() => {
+    return `${path.channelId}-${MESSAGES_CACHE_KEY}`
+  }, [path.channelId])
 
   const {
     items: messages,
@@ -88,7 +90,7 @@ export const MessagesProvider: React.FC<
 export const useMessages = (): Messages => {
   const messages = useContext(MessagesContext)
   if (messages === defaultMessagesContext) {
-    throw new Error('useMessages must be used within a MessagesProvider')
+    throw new Error('`useMessages` must be used within a `MessagesProvider`')
   }
   return messages
 }

cypress/e2e/pages/application/[guildId]/[channelId]/index.cy.ts

@@ -241,8 +241,8 @@ describe('Pages > /application/[guildId]/[channelId]', () => {
     cy.visit('/application/abc/abc', {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 
   it("should redirect the user to `/404` if `guildId` doesn't exist", () => {
@@ -253,8 +253,8 @@ describe('Pages > /application/[guildId]/[channelId]', () => {
     cy.visit(`/application/123/${channelExample.id}`, {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 
   it("should redirect the user to `/404` if `channelId` doesn't exist", () => {
@@ -263,8 +263,8 @@ describe('Pages > /application/[guildId]/[channelId]', () => {
       getGuildMemberWithGuildIdHandler
     ]).setCookie('refreshToken', 'refresh-token')
     cy.visit(`/application/${guildExample.id}/123`, { failOnStatusCode: false })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 })
 

cypress/e2e/pages/application/[guildId]/[channelId]/settings.cy.ts

@@ -92,8 +92,8 @@ describe('Pages > /application/[guildId]/[channelId]/settings', () => {
     cy.visit(`/application/${guildExample.id}/${channelExample.id}/settings`, {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 
   it('should redirect the user to `/404` if `guildId` or `channelId` are not numbers', () => {
@@ -104,8 +104,8 @@ describe('Pages > /application/[guildId]/[channelId]/settings', () => {
     cy.visit('/application/abc/abc/settings', {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 
   it("should redirect the user to `/404` if `guildId` doesn't exist", () => {
@@ -116,8 +116,8 @@ describe('Pages > /application/[guildId]/[channelId]/settings', () => {
     cy.visit(`/application/123/${channelExample.id}/settings`, {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 
   it("should redirect the user to `/404` if `channelId` doesn't exist", () => {
@@ -128,8 +128,8 @@ describe('Pages > /application/[guildId]/[channelId]/settings', () => {
     cy.visit(`/application/${guildExample.id}/123/settings`, {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 })
 

cypress/e2e/pages/application/[guildId]/channels/create.cy.ts

@@ -56,8 +56,8 @@ describe('Pages > /application/[guildId]/channels/create', () => {
     cy.visit('/application/abc/channels/create', {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 
   it("should redirect the user to `/404` if `guildId` doesn't exist", () => {
@@ -68,8 +68,8 @@ describe('Pages > /application/[guildId]/channels/create', () => {
     cy.visit(`/application/123/channels/create`, {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 })
 

cypress/e2e/pages/application/[guildId]/settings.cy.ts

@@ -86,8 +86,8 @@ describe('Pages > /application/[guildId]/settings', () => {
     cy.visit('/application/abc/settings', {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 
   it("should redirect the user to `/404` if `guildId` doesn't exist", () => {
@@ -98,8 +98,8 @@ describe('Pages > /application/[guildId]/settings', () => {
     cy.visit(`/application/123/settings`, {
       failOnStatusCode: false
     })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 })
 

cypress/e2e/pages/application/users/[userId]/index.cy.ts

@@ -29,8 +29,8 @@ describe('Pages > /application/users/[userId]', () => {
       'refresh-token'
     )
     cy.visit(`/application/users/123`, { failOnStatusCode: false })
-      .location('pathname')
-      .should('eq', '/404')
+      .get('[data-cy=status-code]')
+      .contains('404')
   })
 })
 

hooks/usePagination.ts

@@ -45,15 +45,6 @@ export const usePagination = <T extends PaginationItem>(
   const fetchState = useRef<FetchState>('idle')
   const afterId = useRef<number | null>(null)
 
-  const updateAfterId = (newItems: T[]): void => {
-    if (!inverse) {
-      afterId.current =
-        newItems.length > 0 ? newItems[newItems.length - 1].id : null
-    } else {
-      afterId.current = newItems.length > 0 ? newItems[0].id : null
-    }
-  }
-
   const nextPageAsync: NextPageAsync = useCallback(
     async (query) => {
       if (fetchState.current !== 'idle') {
@@ -68,21 +59,33 @@ export const usePagination = <T extends PaginationItem>(
       const { data: newItems } = await api.get<T[]>(
         `${url}?${searchParameters.toString()}`
       )
-      updateAfterId(newItems)
+      if (!inverse) {
+        afterId.current =
+          newItems.length > 0 ? newItems[newItems.length - 1].id : null
+      } else {
+        afterId.current = newItems.length > 0 ? newItems[0].id : null
+      }
       setItems((oldItems) => {
         const updatedItems = inverse
           ? [...newItems, ...oldItems]
           : [...oldItems, ...newItems]
+        const unique = updatedItems.reduce<T[]>((accumulator, item) => {
+          const isExisting = accumulator.some(
+            (itemSome) => itemSome.id === item.id
+          )
+          if (!isExisting) {
+            accumulator.push(item)
+          }
+          return accumulator
+        }, [])
         if (cacheKey != null) {
-          savePaginationCache(cacheKey, updatedItems)
+          savePaginationCache(cacheKey, unique)
         }
-        return updatedItems
+        return unique
       })
       setHasMore(newItems.length > 0)
       fetchState.current = 'idle'
     },
-
-    // eslint-disable-next-line react-hooks/exhaustive-deps -- We don't want infinite loops with updateAfterId
     [api, url, inverse, cacheKey]
   )
 
@@ -106,13 +109,18 @@ export const usePagination = <T extends PaginationItem>(
       afterId.current = null
       setItems([])
     } else {
+      fetchState.current = 'loading'
       const newItems = getPaginationCache<T>(cacheKey)
       setItems(newItems)
-      updateAfterId(newItems)
+      if (!inverse) {
+        afterId.current =
+          newItems.length > 0 ? newItems[newItems.length - 1].id : null
+      } else {
+        afterId.current = newItems.length > 0 ? newItems[0].id : null
+      }
+      fetchState.current = 'idle'
     }
-
-    // eslint-disable-next-line react-hooks/exhaustive-deps -- We don't want infinite loops with updateAfterId
-  }, [cacheKey])
+  }, [cacheKey, inverse])
 
   return { items, hasMore, nextPage, resetPagination, setItems }
 }

pages/application/[guildId]/[channelId]/index.tsx

@@ -68,10 +68,7 @@ export const getServerSideProps = authenticationFromServerSide({
     const guildId = Number(context?.params?.guildId)
     if (isNaN(channelId) || isNaN(guildId)) {
       return {
-        redirect: {
-          destination: '/404',
-          permanent: false
-        }
+        notFound: true
       }
     }
     const { data: guildMember } = await api.get(`/guilds/${guildId}`)

pages/application/[guildId]/[channelId]/settings.tsx

@@ -63,10 +63,7 @@ export const getServerSideProps = authenticationFromServerSide({
     const guildId = Number(context?.params?.guildId)
     if (isNaN(channelId) || isNaN(guildId)) {
       return {
-        redirect: {
-          destination: '/404',
-          permanent: false
-        }
+        notFound: true
       }
     }
     const { data: guildMember } = await api.get<GuildMember>(
@@ -74,10 +71,7 @@ export const getServerSideProps = authenticationFromServerSide({
     )
     if (!guildMember.member.isOwner) {
       return {
-        redirect: {
-          destination: '/404',
-          permanent: false
-        }
+        notFound: true
       }
     }
     const { data: selectedChannelData } = await api.get(

pages/application/[guildId]/channels/create.tsx

@@ -49,10 +49,7 @@ export const getServerSideProps = authenticationFromServerSide({
     const guildId = Number(context?.params?.guildId)
     if (isNaN(guildId)) {
       return {
-        redirect: {
-          destination: '/404',
-          permanent: false
-        }
+        notFound: true
       }
     }
     const { data: guildMember } = await api.get(`/guilds/${guildId}`)

pages/application/[guildId]/settings.tsx

@@ -43,10 +43,7 @@ export const getServerSideProps = authenticationFromServerSide({
     const guildId = Number(context?.params?.guildId)
     if (isNaN(guildId)) {
       return {
-        redirect: {
-          destination: '/404',
-          permanent: false
-        }
+        notFound: true
       }
     }
     const { data: guildMember } = await api.get<GuildMember>(

pages/application/users/[userId]/index.tsx

@@ -38,10 +38,7 @@ export const getServerSideProps = authenticationFromServerSide({
     const userId = Number(context?.params?.userId)
     if (isNaN(userId)) {
       return {
-        redirect: {
-          destination: '/404',
-          permanent: false
-        }
+        notFound: true
       }
     }
     const { data } = await api.get(`/users/${userId}`)

tools/authentication/Authentication.ts

@@ -16,7 +16,7 @@ export class Authentication {
   constructor(tokens: Tokens, disableSocketIO: boolean = false) {
     this.tokens = tokens
     this.accessTokenAge = Date.now()
-    if (disableSocketIO || typeof window === 'undefined') {
+    if (typeof window === 'undefined' || disableSocketIO) {
       this.socket = undefined
     } else {
       this.socket = io(API_URL, {

tools/authentication/AuthenticationContext.tsx

@@ -25,8 +25,7 @@ export const AuthenticationProvider: React.FC<
   const [user, setUser] = useState<UserCurrent>(props.authentication.user)
 
   const authentication = useMemo(() => {
-    const disableSocketIO = typeof window === 'undefined'
-    return new Authentication(props.authentication.tokens, disableSocketIO)
+    return new Authentication(props.authentication.tokens)
 
     // eslint-disable-next-line react-hooks/exhaustive-deps -- We only want to run this memo once
   }, [])

tools/authentication/authenticationFromServerSide.ts

@@ -54,10 +54,13 @@ export const authenticationFromServerSide = (
           }
         }
       } else {
-        let data = {}
+        let data: any = {}
         if (fetchData != null) {
           data = await fetchData(context, api)
         }
+        if (data.notFound != null) {
+          return data
+        }
         return { props: data }
       }
     } else {
@@ -71,7 +74,7 @@ export const authenticationFromServerSide = (
       } else {
         try {
           let data: any = {}
-          const authentication = new Authentication(tokens, true)
+          const authentication = new Authentication(tokens)
           const { data: currentUser } = await authentication.api.get<
             unknown,
             AxiosResponse<UserCurrent>
@@ -79,7 +82,7 @@ export const authenticationFromServerSide = (
           if (fetchData != null) {
             data = await fetchData(context, authentication.api)
           }
-          if (data.redirect != null) {
+          if (data.notFound != null) {
             return data
           }
           return {
@@ -87,10 +90,7 @@ export const authenticationFromServerSide = (
           }
         } catch {
           return {
-            redirect: {
-              destination: '/404',
-              permanent: false
-            }
+            notFound: true
           }
         }
       }