refactor the whole damn thing

src/MessageHandler/syncStep1.js

@@ -0,0 +1,53 @@
+import BinaryEncoder from './Util/Binary/Encoder.js'
+
+export function stringifySyncStep1 (decoder, strBuilder) {
+  let auth = decoder.readVarString()
+  let protocolVersion = decoder.readVarUint()
+  strBuilder.push(`
+  - auth: "${auth}"
+  - protocolVersion: ${protocolVersion}
+`)
+  // write SS
+  strBuilder.push('  == SS: \n')
+  let len = decoder.readUint32()
+  for (let i = 0; i < len; i++) {
+    let user = decoder.readVarUint()
+    let clock = decoder.readVarUint()
+    strBuilder.push(`     ${user}: ${clock}\n`)
+  }
+}
+
+export function sendSyncStep1 (y, syncUser) {
+  let encoder = new BinaryEncoder()
+  encoder.writeVarString(y.room)
+  encoder.writeVarString('sync step 1')
+  encoder.writeVarString(y.connector.authInfo || '')
+  encoder.writeVarUint(y.connector.protocolVersion)
+  y.ss.writeStateSet(encoder)
+  y.connector.send(syncUser, encoder.createBuffer())
+}
+
+export function readSyncStep1 (decoder, encoder, y, senderConn, sender) {
+  let protocolVersion = decoder.readVarUint()
+  // check protocol version
+  if (protocolVersion !== y.connector.protocolVersion) {
+    console.warn(
+      `You tried to sync with a yjs instance that has a different protocol version
+      (You: ${protocolVersion}, Client: ${protocolVersion}).
+      The sync was stopped. You need to upgrade your dependencies (especially Yjs & the Connector)!
+      `)
+    y.destroy()
+  }
+
+  // send sync step 2
+  encoder.writeVarString('sync step 2')
+  encoder.writeVarString(y.connector.authInfo || '')
+  writeDeleteSet(encoder)
+  // reads ss and writes os
+  writeOperations(encoder, decoder)
+  y.connector.send(senderConn.uid, encoder.createBuffer())
+  senderConn.receivedSyncStep2 = true
+  if (y.connector.role === 'slave') {
+    sendSyncStep1(y, sender)
+  }
+}