Proyectos de Subversion LeadersLinked - Antes de SPA

import { useEffect, useState } from 'react'
import { axios } from '../utils'

const useMessages = (messagesUrl) => {
  const [oldMessages, setOldMessages] = useState([])
  const [messages, setMessages] = useState([])
  const [currentPage, setCurrentPage] = useState(1)
  const [pages, setPages] = useState(1)
  const [loading, setLoading] = useState(false)
  const [loadingOld, setLoadingOld] = useState(false)

  const getMessages = async () => {
    setLoading(true)
    axios
      .get(messagesUrl)
      .then(({ data: response }) => {
        const { data, success } = response

        if (!success) {
          return
        }

        const messageResponse = [...data.items]
        const updatedMessages = messageResponse.reduce(
          (acum, updatedMessage) => {
            if (
              messages.findIndex(
                (message) => message.id === updatedMessage.id
              ) === -1
            ) {
              acum = [...acum, updatedMessage]
            }
            return acum
          },
          []
        )

        if (updatedMessages.length > 0) {
          setMessages((prevMessages) => [...updatedMessages, ...prevMessages])
          setPages(data.pages)
        }
      })
      .finally(() => setLoading(false))
  }

  const loadOldMessages = () => {
    setLoadingOld(true)
    axios
      .get(`${messagesUrl}?page=${currentPage}`)
      .then(({ data: response }) => {
        const { data, success } = response
        if (success && data.page > 1) {
          setOldMessages([...oldMessages, ...data.items.slice()])
        }
      })
      .finally(() => setLoadingOld(false))
  }

  const onIntersection = (entities) => {
    const target = entities[0]

    if (!target.isIntersecting || currentPage >= pages) {
      return
    }

    setCurrentPage((prevState) => prevState + 1)
    loadOldMessages()
  }

  const reset = () => {
    setMessages([])
    setOldMessages([])
    setCurrentPage(1)
    setPages(1)
  }

  useEffect(() => {
    if (loading) return

    const messagesInterval = setTimeout(() => {
      getMessages()
    }, 2000)

    return () => {
      clearTimeout(messagesInterval)
    }
  }, [loading])

  return {
    messages: [...messages, ...oldMessages],
    loading: loadingOld,
    loadMore: onIntersection,
    reset,
  }
}

export default useMessages