heavily WIP

examples/client_chat/client_chat.js

@@ -17,7 +17,8 @@ const client = mc.createClient({
   host,
   port,
   username,
-  auth: username === 'offline' ? 'offline' : 'microsoft'
+  auth: username === 'offline' ? 'offline' : 'microsoft',
+  version: '1.19.2'
 })
 
 // Boilerplate

src/client/chat.js

@@ -1,8 +1,12 @@
 const states = require('../states')
+const CHAT_PREVIEW_MODES = require('./chatPreviewModes')
 
 module.exports = (client, options) => {
   const mcData = require('minecraft-data')(client.version)
   const players = {} // 1.19+
+  client.previewId = 0
+  client.lastPreviewTime = 0
+  client.msgAwaitingChatPreview = null
 
   function onChat (packet, isMessageFromServer = false) {
     let message = packet.message ?? packet.unsignedChatContent ?? packet.signedChatContent
@@ -27,23 +31,99 @@ module.exports = (client, options) => {
     }
   })
 
-  const EMPTY_BUFFER = Buffer.from([])
-
   client.on('state', function (newState) {
     if (newState === states.PLAY) {
-      client.chat = (message) => {
+      client.chat = message => sendChatMessage(mcData, client, message)
-        if (mcData.supportFeature('signedChat')) {
-          const timestamp = BigInt(Date.now())
-          client.write('chat_message', {
-            message,
-            timestamp,
-            salt: 0,
-            signature: client.profileKeys != null ? EMPTY_BUFFER : client.signMessage(message, timestamp)
-          })
-        } else {
-          client.write('chat', { message })
-        }
-      }
     }
   })
 }
+
+const EMPTY_BUFFER = Buffer.from([])
+
+async function sendChatMessage (mcData, client, message) {
+  if (mcData.supportFeature('signedChat')) {
+    const timestamp = BigInt(Date.now())
+    if (client.chatPreviewMode === CHAT_PREVIEW_MODES.OFF) {
+      console.log("server doesn't preview chat")
+      clearPreview(client)
+    } else {
+      if (message.startsWith('/')) {
+        // TODO: Implement
+        throw new Error('commands are unimplemented')
+      } else {
+        const normalizedMsg = trimAndRemoveRepeatedSpaces(message)
+        if (normalizedMsg.length !== 0 && client.lastPreviewedMsg !== normalizedMsg) {
+          client.lastPreviewedMsg = normalizedMsg
+          await requestChatPreview(client, message)
+        } else {
+          clearPreview(client)
+        }
+        // await preview reply
+      }
+    }
+    return
+    client.write('chat_message', {
+      message,
+      timestamp,
+      salt: 0,
+      signature: client.profileKeys != null ? EMPTY_BUFFER : client.signMessage(message, timestamp)
+    })
+  } else {
+    client.write('chat', { message })
+  }
+}
+
+const { once } = require('events')
+
+async function requestChatPreview (client, msg) {
+  if (maybeTryPreviewMessage(client, msg)) {
+    console.log('did request')
+    client.msgAwaitingChatPreview = msg
+    const [data] = await once(client, 'chat_preview')
+    console.log('requested preview')
+    console.log(data)
+  } else {
+    console.log('didnt')
+  }
+}
+
+function randomIntFromInterval (min, max) { // min and max included
+  return Math.floor(Math.random() * (max - min + 1) + min)
+}
+
+// returns whether we previewed the message
+function maybeTryPreviewMessage (client, msg) {
+  if (client.msgAwaitingChatPreview === msg) {
+    return true
+  }
+
+  const nowMs = Date.now()
+
+  if (nowMs >= client.lastPreviewTime + 100 &&
+    (client.msgAwaitingChatPreview === null || nowMs >= client.lastPreviewTime + 1000)) {
+    client.lastPreviewTime = nowMs
+    client.previewId += randomIntFromInterval(1, 100)
+    console.log('sent request:', {
+      query: client.previewId,
+      message: msg
+    })
+    client.write('chat_preview', {
+      query: client.previewId,
+      message: msg
+    })
+    return true
+  }
+  return false
+}
+
+function trimAndRemoveRepeatedSpaces (str) {
+  return str.trim().replace(/\s+/g, ' ')
+}
+
+function clearPreview (client) {
+  client.lastPreviewedMsg = null
+  client.msgAwaitingChatPreview = null
+  client.lastPreviewResponse = null
+  // client.currentPreviewRequest = null
+  client.lastPreviewTime = 0
+}

src/client/chatPreviewModes.js

@@ -0,0 +1,5 @@
+module.exports = {
+  OFF: 0,
+  LIVE: 1,
+  CONFIRM: 2
+}

src/client/chat_activity_bring_to_mineflayer.js

@@ -0,0 +1,24 @@
+const CHAT_PREVIEW_MODES = require('./chatPreviewModes')
+const ping = require('../ping')
+
+module.exports = (client, options) => {
+  options.chatPreviewMode ??= CHAT_PREVIEW_MODES.LIVE // default in minecraft
+
+  const mcData = require('minecraft-data')(client.version)
+  client.useChatPreview = false
+  client.chatPreviewMode = CHAT_PREVIEW_MODES.OFF
+
+  // autoversion ping called too late
+  ping(options).then((reponse) => {
+    if (mcData.version['==']('1.19.2') && reponse.previewsChat && client.chatPreviewSetting !== CHAT_PREVIEW_MODES.OFF) {
+      console.log('enabling chat preview')
+      client.useChatPreview = true // default state before receiving packet
+      client.chatPreviewMode = options.chatPreviewMode
+    }
+  }).catch(() => { })
+
+  client.on('should_display_chat_preview', ({ should_display_chat_preview: shouldDisplayChatPreview }) => {
+    client.useChatPreview = shouldDisplayChatPreview
+    client.chatPreviewMode = client.useChatPreview ? options.chatPreviewMode : CHAT_PREVIEW_MODES.OFF
+  })
+}

src/client/setProtocol.js

@@ -30,9 +30,10 @@ module.exports = function (client, options) {
           ? {
               timestamp: BigInt(client.profileKeys.expiresOn.getTime()), // should probably be called "expireTime"
               publicKey: client.profileKeys.publicDER,
-              signature: client.profileKeys.signature
+              signature: client.profileKeys.signatureV2 ?? client.profileKeys.signature
             }
-          : null
+          : null,
+        uuid: client.uuid
       })
     }
   }

src/createClient.js

@@ -15,6 +15,7 @@ const autoVersion = require('./client/autoVersion')
 const pluginChannels = require('./client/pluginChannels')
 const versionChecking = require('./client/versionChecking')
 const chat = require('./client/chat')
+const chat_activity = require('./client/chat_activity_bring_to_mineflayer')
 
 module.exports = createClient
 
@@ -62,6 +63,7 @@ function createClient (options) {
   pluginChannels(client, options)
   versionChecking(client, options)
   chat(client, options)
+  chat_activity(client, options)
 
   return client
 }