refactor the whole damn thing

src/Store/StateStore.js

@@ -0,0 +1,30 @@
+import ID from '../Util/ID'
+
+export default class StateStore {
+  constructor (y) {
+    this.y = y
+    this.state = new Map()
+    this.currentClock = 0
+  }
+  getNextID (len) {
+    let id = new ID(this.y.userID, this.currentClock)
+    this.currentClock += len
+    return id
+  }
+  updateRemoteState (struct) {
+    let user = struct._id.user
+    let userState = this.state.get(user)
+    while (struct !== null && struct._id.clock === userState) {
+      userState += struct._length
+      struct = this.y.os.get(new ID(user, userState))
+    }
+    this.state.set(user, userState)
+  }
+  getState (user) {
+    let state = this.state.get(user)
+    if (state == null) {
+      return 0
+    }
+    return state
+  }
+}