Fetch Identifier according to patient type (#64)

* Fetch Id according to patient type

* Update SystemConstants.kt

Author: sevenreup

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

@@ -61,7 +61,7 @@ class QuestionnaireItemViewHolderFactoryMatchersProviderFactoryImpl(
                 it.value.asStringValue() in
                   listOf(
                     LocationPickerViewHolderFactory.WIDGET_TYPE,
-                    LocationPickerViewHolderFactory.WIDGET_TYPE_ALL
+                    LocationPickerViewHolderFactory.WIDGET_TYPE_ALL,
                   )
             }
         },

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

@@ -33,7 +33,7 @@ class CustomQuestItemDataProvider
 constructor(
   val sharedPreferencesHelper: SharedPreferencesHelper,
   val fhirEngine: FhirEngine,
-  val gson: Gson
+  val gson: Gson,
 ) {
 
   fun fetchCurrentFacilityLocationHierarchies(): List<LocationHierarchy> {

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

@@ -52,7 +52,7 @@ class LocationPickerViewHolderFactory(
           questionnaireViewItem.questionnaireItem
             .getExtensionByUrl(WIDGET_EXTENSION)
             .value
-            .asStringValue()
+            .asStringValue(),
         )
         locationPickerView.setOnLocationChanged { value ->
           context.lifecycleScope.launch {

android/engine/src/main/java/org/smartregister/fhircore/engine/util/SystemConstants.kt

@@ -33,6 +33,21 @@ object SystemConstants {
   const val QUESTIONNAIRE_REFERENCE_SYSTEM = "https://d-tree.org/fhir/procedure-code"
   const val LOCATION_TAG = "http://smartregister.org/fhir/location-tag"
   const val LOCATION_HIERARCHY_BINARY = "location-hierarchy"
+
+  fun getIdentifierSystemFromPatientType(patientType: String): String {
+    return when (patientType) {
+      "client-already-on-art",
+      "newly-diagnosed-client", -> {
+        "https://d-tree.org/fhir/patient-identifier-art"
+      }
+      "exposed-infant" -> {
+        "https://d-tree.org/fhir/patient-identifier-hcc"
+      }
+      else -> {
+        "https://d-tree.org/fhir/patient-identifier-hts"
+      }
+    }
+  }
 }
 
 object ReasonConstants {

android/engine/src/main/java/org/smartregister/fhircore/engine/util/extension/PatientExtension.kt

@@ -39,6 +39,7 @@ import org.smartregister.fhircore.engine.R
 import org.smartregister.fhircore.engine.data.domain.PregnancyStatus
 import org.smartregister.fhircore.engine.data.local.DefaultRepository
 import org.smartregister.fhircore.engine.domain.model.HealthStatus
+import org.smartregister.fhircore.engine.util.SystemConstants
 import timber.log.Timber
 
 private const val RISK = "risk"
@@ -304,14 +305,27 @@ fun Patient.extractSecondaryIdentifier(): String? {
   return null
 }
 
-fun Patient.extractOfficialIdentifier(): String? =
-  if (this.hasIdentifier()) {
-    this.identifier
-      .lastOrNull { it.use == Identifier.IdentifierUse.OFFICIAL && it.system != "WHO-HCID" }
-      ?.value
+fun Patient.extractOfficialIdentifier(): String? {
+  val patientType =
+    this.meta.tag
+      .firstOrNull { it.system == SystemConstants.PATIENT_TYPE_FILTER_TAG_VIA_META_CODINGS_SYSTEM }
+      ?.code
+  return if (this.hasIdentifier() && patientType != null) {
+    val actualId =
+      this.identifier.lastOrNull {
+        it.system == SystemConstants.getIdentifierSystemFromPatientType(patientType)
+      }
+    if (actualId != null) {
+      actualId.value
+    } else {
+      this.identifier
+        .lastOrNull { it.use == Identifier.IdentifierUse.OFFICIAL && it.system != "WHO-HCID" }
+        ?.value
+    }
   } else {
     null
   }
+}
 
 fun Coding.toHealthStatus(): HealthStatus {
   return try {