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Code Issues Releases Wiki Activity

Optimistic message sending for chat

This commit is contained in:
eugenijm 2020-10-29 13:33:06 +03:00
parent 148789767a
commit e798e9a417
13 changed files with 206 additions and 44 deletions
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76
src/components/chat/chat.js
View File

@ -12,6 +12,7 @@ import {
faChevronDown,
faChevronLeft
} from '@fortawesome/free-solid-svg-icons'
import { buildFakeMessage } from '../../services/chat_utils/chat_utils.js'
library.add(
faChevronDown,
@ -22,6 +23,7 @@ const BOTTOMED_OUT_OFFSET = 10
const JUMP_TO_BOTTOM_BUTTON_VISIBILITY_OFFSET = 150
const SAFE_RESIZE_TIME_OFFSET = 100
const MARK_AS_READ_DELAY = 1500
const MAX_RETRIES = 10
const Chat = {
components: {
@ -35,7 +37,8 @@ const Chat = {
hoveredMessageChainId: undefined,
lastScrollPosition: {},
scrollableContainerHeight: '100%',
errorLoadingChat: false
errorLoadingChat: false,
messageRetriers: {}
}
},
created () {
@ -219,7 +222,10 @@ const Chat = {
if (!(this.currentChatMessageService && this.currentChatMessageService.maxId)) { return }
if (document.hidden) { return }
const lastReadId = this.currentChatMessageService.maxId
this.$store.dispatch('readChat', { id: this.currentChat.id, lastReadId })
this.$store.dispatch('readChat', {
id: this.currentChat.id,
lastReadId
})
},
bottomedOut (offset) {
return isBottomedOut(this.$refs.scrollable, offset)
@ -309,42 +315,74 @@ const Chat = {
})
this.fetchChat({ isFirstFetch: true })
},
sendMessage ({ status, media }) {
handleAttachmentPosting () {
this.$nextTick(() => {
this.handleResize()
// When the posting form size changes because of a media attachment, we need an extra resize
// to account for the potential delay in the DOM update.
setTimeout(() => {
this.updateScrollableContainerHeight()
}, SAFE_RESIZE_TIME_OFFSET)
this.scrollDown({ forceRead: true })
})
},
sendMessage ({ status, media, idempotencyKey }) {
const params = {
id: this.currentChat.id,
content: status
content: status,
idempotencyKey
}
if (media[0]) {
params.mediaId = media[0].id
}
return this.backendInteractor.sendChatMessage(params)
const fakeMessage = buildFakeMessage({
attachments: media,
chatId: this.currentChat.id,
content: status,
userId: this.currentUser.id,
idempotencyKey
})
this.$store.dispatch('addChatMessages', {
chatId: this.currentChat.id,
messages: [fakeMessage]
}).then(() => {
this.handleAttachmentPosting()
})
return this.doSendMessage({ params, fakeMessage, retriesLeft: MAX_RETRIES })
},
doSendMessage ({ params, fakeMessage, retriesLeft = MAX_RETRIES }) {
if (retriesLeft <= 0) return
this.backendInteractor.sendChatMessage(params)
.then(data => {
this.$store.dispatch('addChatMessages', {
chatId: this.currentChat.id,
messages: [data],
updateMaxId: false
}).then(() => {
this.$nextTick(() => {
this.handleResize()
// When the posting form size changes because of a media attachment, we need an extra resize
// to account for the potential delay in the DOM update.
setTimeout(() => {
this.updateScrollableContainerHeight()
}, SAFE_RESIZE_TIME_OFFSET)
this.scrollDown({ forceRead: true })
})
updateMaxId: false,
messages: [{ ...data, fakeId: fakeMessage.id }]
})
return data
})
.catch(error => {
console.error('Error sending message', error)
return {
error: this.$t('chats.error_sending_message')
this.$store.dispatch('handleMessageError', {
chatId: this.currentChat.id,
fakeId: fakeMessage.id,
isRetry: retriesLeft !== MAX_RETRIES
})
if ((error.statusCode >= 500 && error.statusCode < 600) || error.message === 'Failed to fetch') {
this.messageRetriers[fakeMessage.id] = setTimeout(() => {
this.doSendMessage({ params, fakeMessage, retriesLeft: retriesLeft - 1 })
}, 1000 * (2 ** (MAX_RETRIES - retriesLeft)))
}
return {}
})
return Promise.resolve(fakeMessage)
},
goBack () {
this.$router.push({ name: 'chats', params: { username: this.currentUser.screen_name } })

1
src/components/chat/chat.vue
View File

@ -80,6 +80,7 @@
:disable-sensitivity-checkbox="true"
:disable-submit="errorLoadingChat || !currentChat"
:disable-preview="true"
:optimistic-posting="true"
:post-handler="sendMessage"
:submit-on-enter="!mobileLayout"
:preserve-focus="!mobileLayout"

13
src/components/chat_message/chat_message.scss
View File

@ -101,6 +101,19 @@
}
}
.pending {
.status-content.media-body, .created-at {
color: var(--faint);
}
}
.error {
.status-content.media-body, .created-at {
color: $fallback--cRed;
color: var(--badgeNotification, $fallback--cRed);
}
}
.incoming {
a {
color: var(--chatMessageIncomingLink, $fallback--link);

2
src/components/chat_message/chat_message.vue
View File

@ -32,7 +32,7 @@
>
<div
class="media status"
:class="{ 'without-attachment': !hasAttachment }"
:class="{ 'without-attachment': !hasAttachment, 'pending': chatViewItem.data.pending, 'error': chatViewItem.data.error }"
style="position: relative"
@mouseenter="hovered = true"
@mouseleave="hovered = false"

7
src/components/post_status_form/post_status_form.js
View File

@ -75,7 +75,8 @@ const PostStatusForm = {
'autoFocus',
'fileLimit',
'submitOnEnter',
'emojiPickerPlacement'
'emojiPickerPlacement',
'optimisticPosting'
],
components: {
MediaUpload,
@ -272,7 +273,7 @@ const PostStatusForm = {
if (this.preview) this.previewStatus()
},
async postStatus (event, newStatus, opts = {}) {
if (this.posting) { return }
if (this.posting && !this.optimisticPosting) { return }
if (this.disableSubmit) { return }
if (this.emojiInputShown) { return }
if (this.submitOnEnter) {
@ -280,6 +281,8 @@ const PostStatusForm = {
event.preventDefault()
}
if (this.optimisticPosting && (this.emptyStatus || this.isOverLengthLimit)) { return }
if (this.emptyStatus) {
this.error = this.$t('post_status.empty_status_error')
return

4
src/components/post_status_form/post_status_form.vue
View File

@ -124,7 +124,7 @@
v-model="newStatus.spoilerText"
type="text"
:placeholder="$t('post_status.content_warning')"
:disabled="posting"
:disabled="posting && !optimisticPosting"
size="1"
class="form-post-subject"
>
@ -150,7 +150,7 @@
:placeholder="placeholder || $t('post_status.default')"
rows="1"
cols="1"
:disabled="posting"
:disabled="posting && !optimisticPosting"
class="form-post-body"
:class="{ 'scrollable-form': !!maxHeight }"
@keydown.exact.enter="submitOnEnter && postStatus($event, newStatus)"

18
src/modules/api.js
View File

@ -75,12 +75,18 @@ const api = {
} else if (message.event === 'delete') {
dispatch('deleteStatusById', message.id)
} else if (message.event === 'pleroma:chat_update') {
dispatch('addChatMessages', {
chatId: message.chatUpdate.id,
messages: [message.chatUpdate.lastMessage]
})
dispatch('updateChat', { chat: message.chatUpdate })
maybeShowChatNotification(store, message.chatUpdate)
// The setTimeout wrapper is a temporary band-aid to avoid duplicates for the user's own messages when doing optimistic sending.
// The cause of the duplicates is the WS event arriving earlier than the HTTP response.
// This setTimeout wrapper can be removed once the commit `8e41baff` is in the stable Pleroma release.
// (`8e41baff` adds the idempotency key to the chat message entity, which PleromaFE uses when it's available, and it makes this artificial delay unnecessary).
setTimeout(() => {
dispatch('addChatMessages', {
chatId: message.chatUpdate.id,
messages: [message.chatUpdate.lastMessage]
})
dispatch('updateChat', { chat: message.chatUpdate })
maybeShowChatNotification(store, message.chatUpdate)
}, 100)
}
}
)

22
src/modules/chats.js
View File

@ -16,7 +16,8 @@ const defaultState = {
openedChats: {},
openedChatMessageServices: {},
fetcher: undefined,
currentChatId: null
currentChatId: null,
lastReadMessageId: null
}
const getChatById = (state, id) => {
@ -92,9 +93,14 @@ const chats = {
commit('setCurrentChatFetcher', { fetcher: undefined })
},
readChat ({ rootState, commit, dispatch }, { id, lastReadId }) {
const isNewMessage = rootState.chats.lastReadMessageId !== lastReadId
dispatch('resetChatNewMessageCount')
commit('readChat', { id })
rootState.api.backendInteractor.readChat({ id, lastReadId })
commit('readChat', { id, lastReadId })
if (isNewMessage) {
rootState.api.backendInteractor.readChat({ id, lastReadId })
}
},
deleteChatMessage ({ rootState, commit }, value) {
rootState.api.backendInteractor.deleteChatMessage(value)
@ -106,6 +112,9 @@ const chats = {
},
clearOpenedChats ({ rootState, commit, dispatch, rootGetters }) {
commit('clearOpenedChats', { commit })
},
handleMessageError ({ commit }, value) {
commit('handleMessageError', { commit, ...value })
}
},
mutations: {
@ -208,11 +217,16 @@ const chats = {
}
}
},
readChat (state, { id }) {
readChat (state, { id, lastReadId }) {
state.lastReadMessageId = lastReadId
const chat = getChatById(state, id)
if (chat) {
chat.unread = 0
}
},
handleMessageError (state, { chatId, fakeId, isRetry }) {
const chatMessageService = state.openedChatMessageServices[chatId]
chatService.handleMessageError(chatMessageService, fakeId, isRetry)
}
}
}

17
src/services/api/api.service.js
View File

@ -129,7 +129,11 @@ const promisedRequest = ({ method, url, params, payload, credentials, headers =
return reject(new StatusCodeError(response.status, json, { url, options }, response))
}
return resolve(json)
}))
})
.catch((error) => {
return reject(new StatusCodeError(response.status, error, { url, options }, response))
})
)
})
}
@ -1210,7 +1214,7 @@ const chatMessages = ({ id, credentials, maxId, sinceId, limit = 20 }) => {
})
}
const sendChatMessage = ({ id, content, mediaId = null, credentials }) => {
const sendChatMessage = ({ id, content, mediaId = null, idempotencyKey, credentials }) => {
const payload = {
'content': content
}
@ -1219,11 +1223,18 @@ const sendChatMessage = ({ id, content, mediaId = null, credentials }) => {
payload['media_id'] = mediaId
}
const headers = {}
if (idempotencyKey) {
headers['idempotency-key'] = idempotencyKey
}
return promisedRequest({
url: PLEROMA_CHAT_MESSAGES_URL(id),
method: 'POST',
payload: payload,
credentials
credentials,
headers
})
}

63
src/services/chat_service/chat_service.js
View File

@ -3,6 +3,7 @@ import _ from 'lodash'
const empty = (chatId) => {
return {
idIndex: {},
idempotencyKeyIndex: {},
messages: [],
newMessageCount: 0,
lastSeenTimestamp: 0,
@ -13,8 +14,18 @@ const empty = (chatId) => {
}
const clear = (storage) => {
storage.idIndex = {}
storage.messages.splice(0, storage.messages.length)
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.id]
}
}
storage.messages = storage.messages.filter(m => failedMessageIds.includes(m.id))
storage.newMessageCount = 0
storage.lastSeenTimestamp = 0
storage.minId = undefined
@ -37,6 +48,25 @@ const deleteMessage = (storage, messageId) => {
}
}
const handleMessageError = (storage, fakeId, isRetry) => {
if (!storage) { return }
const fakeMessage = storage.idIndex[fakeId]
if (fakeMessage) {
fakeMessage.error = true
fakeMessage.pending = false
if (!isRetry) {
// Ensure the failed message doesn't stay at the bottom of the list.
const lastPersistedMessage = _.orderBy(storage.messages, ['pending', 'id'], ['asc', 'desc'])[0]
if (lastPersistedMessage) {
const oldId = fakeMessage.id
fakeMessage.id = `${lastPersistedMessage.id}-${new Date().getTime()}`
storage.idIndex[fakeMessage.id] = fakeMessage
delete storage.idIndex[oldId]
}
}
}
}
const add = (storage, { messages: newMessages, updateMaxId = true }) => {
if (!storage) { return }
for (let i = 0; i < newMessages.length; i++) {
@ -45,7 +75,19 @@ const add = (storage, { messages: newMessages, updateMaxId = true }) => {
// sanity check
if (message.chat_id !== storage.chatId) { return }
if (!storage.minId || message.id < storage.minId) {
if (message.fakeId) {
const fakeMessage = storage.idIndex[message.fakeId]
if (fakeMessage) {
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
}
@ -55,16 +97,22 @@ const add = (storage, { messages: newMessages, updateMaxId = true }) => {
}
}
if (!storage.idIndex[message.id]) {
if (!storage.idIndex[message.id] && !isConfirmation(storage, message)) {
if (storage.lastSeenTimestamp < message.created_at) {
storage.newMessageCount++
}
storage.messages.push(message)
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) { return }
storage.newMessageCount = 0
@ -76,7 +124,7 @@ const getView = (storage) => {
if (!storage) { return [] }
const result = []
const messages = _.sortBy(storage.messages, ['id', 'desc'])
const messages = _.orderBy(storage.messages, ['pending', 'id'], ['asc', 'asc'])
const firstMessage = messages[0]
let previousMessage = messages[messages.length - 1]
let currentMessageChainId
@ -148,7 +196,8 @@ const ChatService = {
getView,
deleteMessage,
resetNewMessageCount,
clear
clear,
handleMessageError
}
export default ChatService

21
src/services/chat_utils/chat_utils.js
View File

@ -18,3 +18,24 @@ export const maybeShowChatNotification = (store, chat) => {
showDesktopNotification(store.rootState, opts)
}
export const buildFakeMessage = ({ content, chatId, attachments, userId, idempotencyKey }) => {
const fakeMessage = {
content,
chat_id: chatId,
created_at: new Date(),
id: `${new Date().getTime()}`,
attachments: attachments,
account_id: userId,
idempotency_key: idempotencyKey,
emojis: [],
pending: true,
isNormalized: true
}
if (attachments[0]) {
fakeMessage.attachment = attachments[0]
}
return fakeMessage
}

3
src/services/entity_normalizer/entity_normalizer.service.js
View File

@ -429,6 +429,9 @@ export const parseChatMessage = (message) => {
} else {
output.attachments = []
}
output.pending = !!message.pending
output.error = false
output.idempotency_key = message.idempotency_key
output.isNormalized = true
return output
}

3
test/unit/specs/services/chat_service/chat_service.spec.js
View File

@ -2,17 +2,20 @@ import chatService from '../../../../../src/services/chat_service/chat_service.j
const message1 = {
id: '9wLkdcmQXD21Oy8lEX',
idempotency_key: '1',
created_at: (new Date('2020-06-22T18:45:53.000Z'))
}
const message2 = {
id: '9wLkdp6ihaOVdNj8Wu',
idempotency_key: '2',
account_id: '9vmRb29zLQReckr5ay',
created_at: (new Date('2020-06-22T18:45:56.000Z'))
}
const message3 = {
id: '9wLke9zL4Dy4OZR2RM',
idempotency_key: '3',
account_id: '9vmRb29zLQReckr5ay',
created_at: (new Date('2020-07-22T18:45:59.000Z'))
}