86 lines
2.4 KiB
TypeScript
86 lines
2.4 KiB
TypeScript
import { createContext, useContext, useEffect } from 'react'
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import { NextPage, usePagination } from 'hooks/usePagination'
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import { useAuthentication } from 'tools/authentication'
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import { MessageWithMember } from 'models/Message'
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import { GuildsChannelsPath } from 'components/Application'
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import { handleSocketData, SocketData } from 'tools/handleSocketData'
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export interface Messages {
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messages: MessageWithMember[]
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hasMore: boolean
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nextPage: NextPage
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}
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const defaultMessagesContext = {} as any
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const MessagesContext = createContext<Messages>(defaultMessagesContext)
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export interface MessagesProviderProps {
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path: GuildsChannelsPath
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}
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export const MessagesProvider: React.FC<MessagesProviderProps> = (props) => {
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const { path, children } = props
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const { authentication } = useAuthentication()
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const {
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items: messages,
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hasMore,
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nextPage,
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resetPagination,
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setItems
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} = usePagination<MessageWithMember>({
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api: authentication.api,
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url: `/channels/${path.channelId}/messages`,
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inverse: true
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})
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useEffect(() => {
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authentication.socket.on(
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'messages',
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(data: SocketData<MessageWithMember>) => {
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if (data.item.channelId === path.channelId) {
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const messagesDiv = window.document.getElementById(
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'messages'
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) as HTMLDivElement
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const isAtBottom =
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messagesDiv.scrollHeight - messagesDiv.scrollTop <=
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messagesDiv.clientHeight
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handleSocketData({ data, setItems })
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if (data.action === 'create' && isAtBottom) {
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messagesDiv.scrollTo(0, messagesDiv.scrollHeight)
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}
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}
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}
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)
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return () => {
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authentication.socket.off('messages')
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}
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}, [authentication.socket, setItems, path])
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useEffect(() => {
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resetPagination()
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nextPage(undefined, () => {
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const messagesDiv = window.document.getElementById(
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'messages'
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) as HTMLDivElement
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messagesDiv.scrollTo(0, messagesDiv.scrollHeight)
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})
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}, [nextPage, resetPagination])
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return (
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<MessagesContext.Provider value={{ messages, hasMore, nextPage }}>
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{children}
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</MessagesContext.Provider>
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)
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}
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export const useMessages = (): Messages => {
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const messages = useContext(MessagesContext)
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if (messages === defaultMessagesContext) {
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throw new Error('useMessages must be used within a MessagesProvider')
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}
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return messages
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}
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