Added Builder to Questionnaire Fragment.

catalog/src/main/java/com/google/android/fhir/catalog/CustomQuestionnaireFragment.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021 Google LLC
+ * Copyright 2022 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,11 +16,12 @@
 
 package com.google.android.fhir.catalog
 
-import com.google.android.fhir.datacapture.QuestionnaireFragment
+import com.google.android.fhir.datacapture.QuestionnaireFragment.QuestionnaireItemViewHolderFactoryMatcher
 import com.google.android.fhir.datacapture.contrib.views.barcode.QuestionnaireItemBarCodeReaderViewHolderFactory
 
-class CustomQuestionnaireFragment : QuestionnaireFragment() {
- override fun getCustomQuestionnaireItemViewHolderFactoryMatchers():
+// TODO Remove this file and move this code to maybe a custom view in catalog app?
+class CustomQuestionnaireFragment /*: QuestionnaireFragment()*/ {
+ /*override*/ fun getCustomQuestionnaireItemViewHolderFactoryMatchers():
  List<QuestionnaireItemViewHolderFactoryMatcher> {
  return listOf(
  QuestionnaireItemViewHolderFactoryMatcher(CustomNumberPickerFactory) { questionnaireItem ->
@@ -30,9 +31,8 @@ class CustomQuestionnaireFragment : QuestionnaireFragment() {
  },
  QuestionnaireItemViewHolderFactoryMatcher(QuestionnaireItemBarCodeReaderViewHolderFactory) {
  questionnaireItem ->
- questionnaireItem.getExtensionByUrl(
- QuestionnaireItemBarCodeReaderViewHolderFactory.WIDGET_EXTENSION
- )
+ questionnaireItem
+ .getExtensionByUrl(QuestionnaireItemBarCodeReaderViewHolderFactory.WIDGET_EXTENSION)
  .let {
  if (it == null) false
  else it.value.toString() == QuestionnaireItemBarCodeReaderViewHolderFactory.WIDGET_TYPE

catalog/src/main/java/com/google/android/fhir/catalog/DemoQuestionnaireFragment.kt

@@ -26,11 +26,8 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
-import androidx.core.os.bundleOf
 import androidx.fragment.app.Fragment
-import androidx.fragment.app.add
 import androidx.fragment.app.commit
-import androidx.fragment.app.replace
 import androidx.fragment.app.setFragmentResultListener
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.lifecycleScope
@@ -146,14 +143,12 @@ class DemoQuestionnaireFragment : Fragment() {
  if (childFragmentManager.findFragmentByTag(QUESTIONNAIRE_FRAGMENT_TAG) == null) {
  childFragmentManager.commit {
  setReorderingAllowed(true)
- add<QuestionnaireFragment>(
+ add(
  R.id.container,
- tag = QUESTIONNAIRE_FRAGMENT_TAG,
- args =
- bundleOf(
- QuestionnaireFragment.EXTRA_QUESTIONNAIRE_JSON_STRING to
- viewModel.getQuestionnaireJson()
- )
+ QuestionnaireFragment.builder()
+ .setQuestionnaire(viewModel.getQuestionnaireJson())
+ .build(),
+ QUESTIONNAIRE_FRAGMENT_TAG
  )
  }
  }
@@ -179,13 +174,10 @@ class DemoQuestionnaireFragment : Fragment() {
  }
  childFragmentManager.commit {
  setReorderingAllowed(true)
- replace<QuestionnaireFragment>(
+ replace(
  R.id.container,
- tag = QUESTIONNAIRE_FRAGMENT_TAG,
- args =
- bundleOf(
- QuestionnaireFragment.EXTRA_QUESTIONNAIRE_JSON_STRING to questionnaireJsonString
- )
+ QuestionnaireFragment.builder().setQuestionnaire(questionnaireJsonString).build(),
+ QUESTIONNAIRE_FRAGMENT_TAG
  )
  }
  }

datacapture/src/main/java/com/google/android/fhir/datacapture/DataCaptureConfig.kt

@@ -18,6 +18,8 @@ package com.google.android.fhir.datacapture
 
 import android.app.Application
 import com.google.android.fhir.datacapture.DataCaptureConfig.Provider
+import com.google.android.fhir.datacapture.QuestionnaireFragment.QuestionnaireItemViewHolderFactoryMatcher
+import com.google.android.fhir.datacapture.QuestionnaireFragment.QuestionnaireItemViewHolderFactoryMatchersProvider
 import org.hl7.fhir.r4.context.SimpleWorkerContext
 import org.hl7.fhir.r4.model.Coding
 import org.hl7.fhir.r4.model.Resource
@@ -53,6 +55,15 @@ data class DataCaptureConfig(
  * https://build.fhir.org/ig/HL7/sdc/expressions.html#fhirquery for more details.
  */
  var xFhirQueryResolver: XFhirQueryResolver? = null,
+
+ /**
+ * A [QuestionnaireItemViewHolderFactoryMatchersProviderFactory] may be set by the client to
+ * provide [QuestionnaireItemViewHolderFactoryMatcher]s to add custom questionnaire components or
+ * override the behaviour of existing components in the sdc.
+ */
+ var questionnaireItemViewHolderFactoryMatchersProviderFactory:
+ QuestionnaireItemViewHolderFactoryMatchersProviderFactory? =
+ null
 ) {
 
  internal val simpleWorkerContext: SimpleWorkerContext by lazy {
@@ -93,3 +104,17 @@ interface ExternalAnswerValueSetResolver {
 fun interface XFhirQueryResolver {
  suspend fun resolve(xFhirQuery: String): List<Resource>
 }
+
+/**
+ * Factory to create [QuestionnaireItemViewHolderFactoryMatchersProvider] for the
+ * [QuestionnaireFragment] to provide [List] of [QuestionnaireItemViewHolderFactoryMatcher]. The
+ * developers may provide the factory to the library via [DataCaptureConfig] to add custom
+ * questionnaire components or override the behaviour of existing components in the sdc.
+ *
+ * See the
+ * [developer guide](https://github.com/google/android-fhir/wiki/SDCL:-Customize-how-a-Questionnaire-is-displayed#custom-questionnaire-components)
+ * for more information.
+ */
+fun interface QuestionnaireItemViewHolderFactoryMatchersProviderFactory {
+ fun get(provider: String): QuestionnaireItemViewHolderFactoryMatchersProvider
+}