Deploy v11.2.6 (hot fix for #54)

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "yjs",
-  "version": "11.2.2",
+  "version": "11.2.6",
   "homepage": "y-js.org",
   "authors": [
     "Kevin Jahns <kevin.jahns@rwth-aachen.de>"

y.es6

@@ -67,6 +67,16 @@ module.exports = function (Y/* :any */) {
       this.whenSyncedListeners = []
       return this.y.db.stopGarbageCollector()
     }
+    repair () {
+      console.info('Repairing the state of Yjs. This can happen if messages get lost, and Yjs detects that something is wrong. If this happens often, please report an issue here: https://github.com/y-js/yjs/issues')
+      for (var name in this.connections) {
+        this.connections[name].isSynced = false
+      }
+      this.isSynced = false
+      this.currentSyncTarget = null
+      this.broadcastedHB = false
+      this.findNextSyncTarget()
+    }
     setUserId (userId) {
       if (this.userId == null) {
         this.userId = userId
@@ -696,6 +706,41 @@ module.exports = function (Y /* :any */) {
       if (this.gcTimeout > 0) {
         garbageCollect()
       }
+      this.repairCheckInterval = !opts.repairCheckInterval ? 6000 : opts.repairCheckInterval
+      this.opsReceivedTimestamp = new Date()
+      this.startRepairCheck()
+    }
+    startRepairCheck () {
+      var os = this
+      if (this.repairCheckInterval > 0) {
+        this.repairCheckIntervalHandler = setInterval(function repairOnMissingOperations () {
+          /*
+            Case 1. No ops have been received in a while (new Date() - os.opsReceivedTimestamp > os.repairCheckInterval)
+              - 1.1 os.listenersById is empty. Then the state was correct the whole time. -> Nothing to do (nor to update)
+              - 1.2 os.listenersById is not empty.
+                      * Then the state was incorrect for at least {os.repairCheckInterval} seconds.
+                      * -> Remove everything in os.listenersById and sync again (connector.repair())
+            Case 2. An op has been received in the last {os.repairCheckInterval } seconds.
+                    It is not yet necessary to check for faulty behavior. Everything can still resolve itself. Wait for more messages.
+                    If nothing was received for a while and os.listenersById is still not emty, we are in case 1.2
+                    -> Do nothing
+
+            Baseline here is: we really only have to catch case 1.2..
+          */
+          if (
+            new Date() - os.opsReceivedTimestamp > os.repairCheckInterval &&
+            Object.keys(os.listenersById).length > 0 // os.listenersById is not empty
+          ) {
+            // haven't received operations for over {os.repairCheckInterval} seconds, resend state vector
+            os.listenersById = {}
+            os.opsReceivedTimestamp = new Date() // update so you don't send repair several times in a row
+            os.y.connector.repair()
+          }
+        }, this.repairCheckInterval)
+      }
+    }
+    stopRepairCheck () {
+      clearInterval(this.repairCheckIntervalHandler)
     }
     queueGarbageCollector (id) {
       if (this.y.isConnected()) {
@@ -791,6 +836,7 @@ module.exports = function (Y /* :any */) {
     * destroy () {
       clearInterval(this.gcInterval)
       this.gcInterval = null
+      this.stopRepairCheck()
       for (var key in this.initializedTypes) {
         var type = this.initializedTypes[key]
         if (type._destroy != null) {
@@ -830,12 +876,14 @@ module.exports = function (Y /* :any */) {
     /*
       Apply a list of operations.
 
+      * we save a timestamp, because we received new operations that could resolve ops in this.listenersById (see this.startRepairCheck)
       * get a transaction
       * check whether all Struct.*.requiredOps are in the OS
       * check if it is an expected op (otherwise wait for it)
       * check if was deleted, apply a delete operation after op was applied
     */
     apply (ops) {
+      this.opsReceivedTimestamp = new Date()
       for (var i = 0; i < ops.length; i++) {
         var o = ops[i]
         if (o.id == null || o.id[0] !== this.y.connector.userId) {
@@ -954,13 +1002,12 @@ module.exports = function (Y /* :any */) {
           var opid = op.id
           var isGarbageCollected = yield* this.isGarbageCollected(opid)
           if (!isGarbageCollected) {
+            // TODO: reduce number of get / put calls for op ..
             yield* Y.Struct[op.struct].execute.call(this, op)
             yield* this.addOperation(op)
             yield* this.store.operationAdded(this, op)
-            if (!Y.utils.compareIds(opid, op.id)) {
-              // operationAdded changed op
-              op = yield* this.getOperation(opid)
-            }
+            // operationAdded can change op..
+            op = yield* this.getOperation(opid)
             // if insertion, try to combine with left
             yield* this.tryCombineWithLeft(op)
           }
@@ -1024,6 +1071,7 @@ module.exports = function (Y /* :any */) {
           // Delete if DS says this is actually deleted
           var len = op.content != null ? op.content.length : 1
           var startId = op.id // You must not use op.id in the following loop, because op will change when deleted
+            // TODO: !! console.log('TODO: change this before commiting')
           for (let i = 0; i < len; i++) {
             var id = [startId[0], startId[1] + i]
             var opIsDeleted = yield* transaction.isDeleted(id)
@@ -2505,6 +2553,7 @@ module.exports = function (Y/* :any */) {
           if (firstMissing != null) {
             // update startPos
             startPos = firstMissing.id[1]
+            startSS[user] = startPos
           }
         }
         yield* this.os.iterate(this, [user, startPos], [user, Number.MAX_VALUE], function * (op) {