Link encounter with task (#93)

* Link encounter with task

* Update FhirCarePlanGenerator.kt

* Code refactor

* Bug fix: call asReference on encounterReference

* Update QuestionnaireViewModel.kt

* removed taskID

---------

Co-authored-by: Comfort Mwalija <calmwalija@gmail.com>

Author: BuchiNy

android/engine/src/main/java/org/smartregister/fhircore/engine/task/FhirCarePlanGenerator.kt

@@ -29,11 +29,13 @@ import org.hl7.fhir.r4.model.IdType
 import org.hl7.fhir.r4.model.Parameters
 import org.hl7.fhir.r4.model.PlanDefinition
 import org.hl7.fhir.r4.model.Resource
+import org.hl7.fhir.r4.model.ResourceType
 import org.hl7.fhir.r4.model.StructureMap
 import org.hl7.fhir.r4.model.Task
 import org.hl7.fhir.r4.utils.FHIRPathEngine
 import org.hl7.fhir.r4.utils.StructureMapUtilities
 import org.smartregister.fhircore.engine.data.local.DefaultRepository
+import org.smartregister.fhircore.engine.util.extension.asReference
 import org.smartregister.fhircore.engine.util.extension.encodeResourceToString
 import org.smartregister.fhircore.engine.util.extension.getCarePlanId
 import org.smartregister.fhircore.engine.util.extension.taskStatusToCarePlanActivityStatus
@@ -133,12 +135,17 @@ constructor(val fhirEngine: FhirEngine, val transformSupportServices: TransformS
       }
   }
 
-  suspend fun completeTask(id: String, encounterStatus: EncounterStatus?) {
+  suspend fun completeTask(
+    id: String,
+    encounterStatus: EncounterStatus?,
+    encounterReference: String,
+  ) {
     val resourcesToUpdate = mutableListOf<Resource>()
     val task =
       fhirEngine.get<Task>(id).apply {
         this.status = encounterStatusToTaskStatus(encounterStatus)
         this.lastModified = Date()
+        this.encounter = encounterReference.asReference(ResourceType.Encounter)
       }
     resourcesToUpdate.add(task)
     val carePlanId = task.getCarePlanId()

android/engine/src/main/java/org/smartregister/fhircore/engine/ui/questionnaire/QuestionnaireViewModel.kt

@@ -459,12 +459,12 @@ constructor(
 
   private suspend fun updateCarePlanAndTask(extras: List<Resource>, backReference: String?) {
     if (backReference != null && backReference != "notify") {
-      extras.forEach {
-        if (it is Encounter) {
-          fhirCarePlanGenerator.completeTask(
-            backReference.asReference(ResourceType.Task).extractId(),
-            it.status,
-          )
+      extras.forEach { resource ->
+        if (resource is Encounter) {
+          val taskReference = backReference.asReference(ResourceType.Task).extractId()
+          val encounterStatus = resource.status
+          val encounterReference = resource.logicalId.removePrefix("#")
+          fhirCarePlanGenerator.completeTask(taskReference, encounterStatus, encounterReference)
         }
       }
     }