Issue: rules engine can't retrieve the right version of the lifecycle shared state

[yangyansong-adbe]

When the rules engine evaluates the rule to check if the incoming event is a lifecycle response event and the lifecycle shared state contains install event key, it failed to find the right version of the lifecycle shared state. Let's see what happened inside the Eventhub:

Event Flow
E1 E2 E3 E4 ... En

Event Handling
E1: lifecycle start event => create lifecycle shared state version 1 (with install event data)
..
E4: registering lifecycle extension => create lifecycle shared state version 4 (without install event data)
..
En: response event for E1
..

Then, the rules engine gets lifecycle shared state V4 which doesn't have install event data and will not trigger expected consequence events.

Json Rule

{
      "condition": {
        "type": "group",
        "definition": {
          "logic": "and",
          "conditions": [
            {
              "type": "group",
              "definition": {
                "logic": "or",
                "conditions": [
                  {
                    "type": "group",
                    "definition": {
                      "logic": "and",
                      "conditions": [
                        {
                          "type": "matcher",
                          "definition": {
                            "key": "~type",
                            "matcher": "eq",
                            "values": [
                              "com.adobe.eventType.lifecycle"
                            ]
                          }
                        },
                        {
                          "type": "matcher",
                          "definition": {
                            "key": "~source",
                            "matcher": "eq",
                            "values": [
                              "com.adobe.eventSource.responseContent"
                            ]
                          }
                        },
                        {
                          "type": "matcher",
                          "definition": {
                            "key": "lifecyclecontextdata.launchevent",
                            "matcher": "ex",
                            "values": []
                          }
                        }
                      ]
                    }
                  }
                ]
              }
            },
            {
              "type": "group",
              "definition": {
                "logic": "and",
                "conditions": [
                  {
                    "type": "matcher",
                    "definition": {
                      "key": "~state.com.adobe.module.lifecycle/lifecyclecontextdata.installevent",
                      "matcher": "ex",
                      "values": []
                    }
                  }
                ]
              }
            }
          ]
        }
      },
      "consequences": [
        {
          "id": "RC9a96ebad279642d49f59c6fbe2154d5e",
          "type": "url",
          "detail": {
            "url": "http://www.adobex.com"
          }
        }
      ]
    }

Console Log

Shared state is created for com.adobe.module.lifecycle with data Optional(["lifecyclecontextdata": ["devicename": x86_64, "resolution": 1242x2688, "launchevent": LaunchEvent, "appid": AEPSampleApp 1.0 (1), "hourofday": 15, "dayofweek": 5, "locale": en-US, "runmode": Application, "osversion": iOS]]) and version 4
...

Shared state is created for com.adobe.module.lifecycle with data Optional(["lifecyclecontextdata": ["osversion": iOS, "monthlyenguserevent": MonthlyEngUserEvent, "dailyenguserevent": DailyEngUserEvent, "resolution": 1242x2688, "locale": en-US, "dayofweek": 5, "hourofday": 15, "installevent": InstallEvent, "installdate": 9/10/2020, "launchevent": LaunchEvent, "launches": 1, "runmode": Application, "devicename": x86_64, "appid": AEPSampleApp 1.0 (1)]]) and version 1

[shalehaha]

The cause of this behavior:

Lifecycle set the initial shared state in the OnRegister method using code createSharedState(data: sharedStateData as [String: Any], event: nil). When event is nil, eventhub uses the latest event number. So if eventhub have already received events before the lifecycle createSharedState call, this createSharedState will use a event number larger than 0.

[nporter-adbe]

To solve this we are going to modify the behavior when event is nil when setting shared state. Currently, when nil is used it is versioned at the latest, instead, we will version at 0 when event is nil.