refactored chat handling into chat view component

src/services/chat_service/chat_service.js

@@ -1,39 +1,5 @@
 import { maxBy, minBy, orderBy, sortBy, uniqueId } from 'lodash'
 
-const empty = (chatId) => {
-  return {
-    idIndex: {},
-    idempotencyKeyIndex: {},
-    messages: [],
-    newMessageCount: 0,
-    lastSeenMessageId: '0',
-    chatId,
-    minId: undefined,
-    maxId: undefined,
-  }
-}
-
-const clear = (storage) => {
-  const failedMessageIds = []
-
-  for (const message of storage.messages) {
-    if (message.error) {
-      failedMessageIds.push(message.id)
-    } else {
-      delete storage.idIndex[message.id]
-      delete storage.idempotencyKeyIndex[message.idempotency_key]
-    }
-  }
-
-  storage.messages = storage.messages.filter((m) =>
-    failedMessageIds.includes(m.id),
-  )
-  storage.newMessageCount = 0
-  storage.lastSeenMessageId = '0'
-  storage.minId = undefined
-  storage.maxId = undefined
-}
-
 const deleteMessage = (storage, messageId) => {
   if (!storage) {
     return
@@ -52,22 +18,6 @@ const deleteMessage = (storage, messageId) => {
   }
 }
 
-const cullOlderMessages = (storage) => {
-  const maxIndex = storage.messages.length
-  const minIndex = maxIndex - 50
-  if (maxIndex <= 50) return
-
-  storage.messages = sortBy(storage.messages, ['id'])
-  storage.minId = storage.messages[minIndex].id
-  for (const message of storage.messages) {
-    if (message.id < storage.minId) {
-      delete storage.idIndex[message.id]
-      delete storage.idempotencyKeyIndex[message.idempotency_key]
-    }
-  }
-  storage.messages = storage.messages.slice(minIndex, maxIndex)
-}
-
 const handleMessageError = (storage, fakeId, isRetry) => {
   if (!storage) {
     return
@@ -93,63 +43,6 @@ const handleMessageError = (storage, fakeId, isRetry) => {
   }
 }
 
-const add = (storage, { messages: newMessages, updateMaxId = true }) => {
-  if (!storage) {
-    return
-  }
-  for (let i = 0; i < newMessages.length; i++) {
-    const message = newMessages[i]
-
-    // sanity check
-    if (message.chat_id !== storage.chatId) {
-      return
-    }
-
-    if (message.fakeId) {
-      const fakeMessage = storage.idIndex[message.fakeId]
-      if (fakeMessage) {
-        // In case the same id exists (chat update before POST response)
-        // make sure to remove the older duplicate message.
-        if (storage.idIndex[message.id]) {
-          delete storage.idIndex[message.id]
-          storage.messages = storage.messages.filter(
-            (msg) => msg.id !== message.id,
-          )
-        }
-        Object.assign(fakeMessage, message, { error: false })
-        delete fakeMessage.fakeId
-        storage.idIndex[fakeMessage.id] = fakeMessage
-        delete storage.idIndex[message.fakeId]
-
-        return
-      }
-    }
-
-    if (!storage.minId || (!message.pending && message.id < storage.minId)) {
-      storage.minId = message.id
-    }
-
-    if (!storage.maxId || message.id > storage.maxId) {
-      if (updateMaxId) {
-        storage.maxId = message.id
-      }
-    }
-
-    if (!storage.idIndex[message.id] && !isConfirmation(storage, message)) {
-      if (storage.lastSeenMessageId < message.id) {
-        storage.newMessageCount++
-      }
-      storage.idIndex[message.id] = message
-      storage.messages.push(storage.idIndex[message.id])
-      storage.idempotencyKeyIndex[message.idempotency_key] = true
-    }
-  }
-}
-
-const isConfirmation = (storage, message) => {
-  if (!message.idempotency_key) return
-  return storage.idempotencyKeyIndex[message.idempotency_key]
-}
 
 const resetNewMessageCount = (storage) => {
   if (!storage) {
@@ -160,12 +53,8 @@ const resetNewMessageCount = (storage) => {
 }
 
 const ChatService = {
-  add,
-  empty,
   deleteMessage,
-  cullOlderMessages,
   resetNewMessageCount,
-  clear,
   handleMessageError,
 }