feat: support for asynchronous follow-up count calculation (#300)

This is required if async messaging is used. The request is already gone if response gets processed.

Workflow:

* Keep old followup_count
* Add expected_followup_count
* If: DNPM:DIP accepts the request - copy to to followup_count
* Else: keep old followup_count

This prevents from saving unaccepted follow-up counts.

3 files changed, 11 insertions, 2 deletions

diff --git a/src/main/kotlin/dev/dnpm/etl/processor/monitoring/Request.kt b/src/main/kotlin/dev/dnpm/etl/processor/monitoring/Request.kt
index 67f450f..d62a503 100644
--- a/src/main/kotlin/dev/dnpm/etl/processor/monitoring/Request.kt
+++ b/src/main/kotlin/dev/dnpm/etl/processor/monitoring/Request.kt
@@ -54,6 +54,7 @@ data class Request(
     @Embedded.Nullable var report: Report? = null,
     @Column("submission_accepted") var submissionAccepted: Boolean = false,
     @Column("followup_count") var followupCount: Int = 0,
+    @Column("expected_followup_count") var expectedFollowupCount: Int = 0,
 ) {
   constructor(
       uuid: RequestId,
diff --git a/src/main/kotlin/dev/dnpm/etl/processor/services/RequestProcessor.kt b/src/main/kotlin/dev/dnpm/etl/processor/services/RequestProcessor.kt
index 00e6b73..e545644 100644
--- a/src/main/kotlin/dev/dnpm/etl/processor/services/RequestProcessor.kt
+++ b/src/main/kotlin/dev/dnpm/etl/processor/services/RequestProcessor.kt
@@ -113,6 +113,10 @@ class RequestProcessor(
                 }
             }
 
+        val maxFollowUpCount = this.requestService.allRequestsByPatientPseudonym(request.patientPseudonym())
+            .maxByOrNull { it.followupCount }
+            ?.followupCount ?: -1
+
         if (
             appConfigProperties.postInitialSubmissionBlock &&
             hasSuccessfulInitialSubmission(request.patientPseudonym()) &&
@@ -128,7 +132,8 @@ class RequestProcessor(
                     submissionType = submissionType,
                     status = RequestStatus.BLOCKED_INITIAL,
                     tan = Tan(request.content.metadata?.transferTan.orEmpty()),
-                    followupCount = request.content.followUps?.size ?: 0,
+                    followupCount = maxFollowUpCount,
+                    expectedFollowupCount = request.content.followUps?.size ?: 0,
                 )
             )
             // Exit - no further processing
@@ -166,7 +171,8 @@ class RequestProcessor(
                 submissionType = submissionType,
                 status = RequestStatus.UNKNOWN,
                 tan = Tan(request.content.metadata?.transferTan.orEmpty()),
-                followupCount = request.content.followUps?.size ?: 0,
+                followupCount = maxFollowUpCount,
+                expectedFollowupCount = request.content.followUps?.size ?: 0,
             )
         )
 
diff --git a/src/main/kotlin/dev/dnpm/etl/processor/services/ResponseProcessor.kt b/src/main/kotlin/dev/dnpm/etl/processor/services/ResponseProcessor.kt
index 947ec17..2818e00 100644
--- a/src/main/kotlin/dev/dnpm/etl/processor/services/ResponseProcessor.kt
+++ b/src/main/kotlin/dev/dnpm/etl/processor/services/ResponseProcessor.kt
@@ -53,10 +53,12 @@ class ResponseProcessor(
                       Report(
                           "Keine Probleme erkannt",
                       )
+                  it.followupCount = it.expectedFollowupCount
                 }
 
                 RequestStatus.WARNING -> {
                   it.report = Report("Warnungen über mangelhafte Daten", event.body.orElse(""))
+                  it.followupCount = it.expectedFollowupCount
                 }
 
                 RequestStatus.ERROR -> {