feat(#706): add phenoconversion FAQ item

app/lib/common/models/drug/drug.dart

@@ -110,14 +110,25 @@ extension CriticalDrugs on List<Drug> {
   }
 }
 
-List<String> getDrugsWithBrandNames(List<String>? drugNames) {
-  return drugNames?.map(getDrugWithBrandNames).toList() ?? [];
+List<String> getDrugsWithBrandNames(
+  List<String>? drugNames,
+  { bool capitalize = false }
+) {
+  return drugNames?.map(
+    (drugName) => _getDrugWithBrandNames(drugName, capitalize: capitalize)
+  ).toList() ?? [];
 }
 
-String getDrugWithBrandNames(String drugName) {
-  final drug = CachedDrugs.instance.drugs!.firstWhere(
+String _getDrugWithBrandNames(
+  String drugName,
+  { required bool capitalize }
+) {
+  final drug = CachedDrugs.instance.drugs!.firstOrNullWhere(
     (drug) => drug.name == drugName
   );
-  if (drug.annotations.brandNames.isEmpty) return drugName;
-  return '$drugName (${drug.annotations.brandNames.join(', ')})';
+  final displayedDrugName = capitalize ? drugName.capitalize() : drugName;
+  if (drug == null || drug.annotations.brandNames.isEmpty) {
+    return displayedDrugName;
+  }
+  return '$displayedDrugName (${drug.annotations.brandNames.join(', ')})';
 }

app/lib/common/widgets/module.dart

@@ -29,3 +29,4 @@ export 'scroll_list.dart';
 export 'subheader_divider.dart';
 export 'tutorial/show_app_tour.dart';
 export 'tutorial/show_drug_selection_intro.dart';
+export 'unordered_list.dart';

app/lib/common/widgets/unordered_list.dart

@@ -0,0 +1,36 @@
+import '../module.dart';
+
+// Based on https://stackoverflow.com/a/62341566
+
+class UnorderedList extends StatelessWidget {
+  const UnorderedList(this.texts);
+  final List<String> texts;
+
+  @override
+  Widget build(BuildContext context) {
+    final widgetList = <Widget>[];
+    for (final text in texts) {
+      widgetList.add(UnorderedListItem(text));
+      widgetList.add(SizedBox(height: 5));
+    }
+    return Column(children: widgetList);
+  }
+}
+
+class UnorderedListItem extends StatelessWidget {
+  const UnorderedListItem(this.text);
+  final String text;
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: <Widget>[
+        Text('• '),
+        Expanded(
+          child: Text(text),
+        ),
+      ],
+    );
+  }
+}

app/lib/faq/pages/content.dart

@@ -33,6 +33,31 @@ class FaqWidgetAnswerQuestion extends FaqQuestion {
   });
 }
 
+Column _getPhenoconversionString(
+  Map<String, Map<String, dynamic>> modulators,
+  String Function(String) getDescriptionPerGene,
+) {
+  return Column(
+    crossAxisAlignment: CrossAxisAlignment.start,
+    children: [
+      ...modulators.keys.flatMap(
+      (geneName) => [
+        Text(
+          getDescriptionPerGene(geneName),
+          style: TextStyle(fontStyle: FontStyle.italic),
+        ),
+        SizedBox(height: PharMeTheme.smallSpace * 0.5),
+        UnorderedList(
+          getDrugsWithBrandNames(
+            modulators[geneName]!.keys.toList(),
+            capitalize: true,
+          ),
+        ),
+      ]),
+    ],
+  );
+}
+
 final faqContent = <FaqSection>[
   FaqSection(
     title: (context) => context.l10n.faq_section_title_pgx,
@@ -63,6 +88,25 @@ final faqContent = <FaqSection>[
         question: context.l10n.faq_question_which_medications,
         answer: context.l10n.faq_answer_which_medications,
       ),
+      (context) => FaqWidgetAnswerQuestion(
+        question: context.l10n.faq_question_phenoconversion,
+        answer: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(context.l10n.faq_answer_phenoconversion),
+            SizedBox(height: PharMeTheme.smallSpace * 0.5),
+            _getPhenoconversionString(
+              strongDrugInhibitors,
+              context.l10n.faq_strong_inhibitors,
+            ),
+            SizedBox(height: PharMeTheme.smallSpace * 0.5),
+            _getPhenoconversionString(
+              moderateDrugInhibitors,
+              context.l10n.faq_moderate_inhibitors,
+            ),
+          ],
+        ),
+      ),
       (context) => FaqTextAnswerQuestion(
         question: context.l10n.faq_question_family,
         answer: context.l10n.faq_answer_family,

app/lib/l10n/app_en.arb

@@ -371,6 +371,10 @@
   "faq_answer_genetics_info": "To learn more about genetics, we recommend MedlinePlus, a service of the National Library of Medicine:",
   "faq_question_which_medications": "Which medications have known gene interactions?",
   "faq_answer_which_medications": "Examples of medication classes with known gene interactions include anti-clotting medications (like clopidogrel and warfarin), antidepressants (like sertraline, citalopram, and paroxetine), anti-cholesterol medications (like simvastatin and atorvastatin), acid reducers (like pantoprazole and omeprazole), pain killers (like codeine, tramadol, and ibuprofen), antifungals (like voriconazole), medications that suppress the immune system (like tacrolimus), and anti-cancer medications (like fluorouracil and irinotecan).\n\nSearch a medication in the Medications tab to find out whether it has known gene interactions according to CPIC® and FDA guidelines.",
+  "faq_question_phenoconversion": "Why do my results change when I take certain medications?",
+  "faq_answer_phenoconversion": "Certain medications can change your phenotype that descries how your body responds to medications. Typically, medications either inhibit or induce the activity of a gene. In PharMe, the following interactions are included:",
+  "faq_strong_inhibitors": "Strong {geneName} inhibitors:",
+  "faq_moderate_inhibitors": "Moderate {geneName} inhibitors:",
   "faq_question_family": "Will my results affect my family members?",
   "faq_answer_family": "Yes, since this is a genetic test, it is possible that your results were passed down to you and your siblings from your parents and you will also pass them down to your children.",
   "faq_question_share": "Who can I share my results with?",