Add trace.

Change-Id: Iac1e30f357149fc4c6076d688088f6a54fce73da

core/data/src/main/kotlin/com/google/samples/apps/nowinandroid/core/data/repository/DefaultSearchContentsRepository.kt

@@ -16,6 +16,7 @@
 
 package com.google.samples.apps.nowinandroid.core.data.repository
 
+import androidx.tracing.trace
 import com.google.samples.apps.nowinandroid.core.database.dao.NewsResourceDao
 import com.google.samples.apps.nowinandroid.core.database.dao.NewsResourceFtsDao
 import com.google.samples.apps.nowinandroid.core.database.dao.TopicDao
@@ -78,10 +79,12 @@ internal class DefaultSearchContentsRepository @Inject constructor(
             .distinctUntilChanged()
             .flatMapLatest(topicDao::getTopicEntities)
         return combine(newsResourcesFlow, topicsFlow) { newsResources, topics ->
+            trace("DefaultSearchContentsRepository.searchContents") {
                 SearchResult(
                     topics = topics.map { it.asExternalModel() },
                     newsResources = newsResources.map { it.asExternalModel() },
                 )
+            }
         }.flowOn(defaultDispatcher)
     }
 
@@ -90,6 +93,8 @@ internal class DefaultSearchContentsRepository @Inject constructor(
             newsResourceFtsDao.getCount(),
             topicFtsDao.getCount(),
         ) { newsResourceCount, topicsCount ->
+            trace("DefaultSearchContentsRepository.getSearchContentsCount") {
                 newsResourceCount + topicsCount
+            }
         }.flowOn(defaultDispatcher)
 }

core/domain/src/main/kotlin/com/google/samples/apps/nowinandroid/core/domain/GetFollowableTopicsUseCase.kt

@@ -16,6 +16,7 @@
 
 package com.google.samples.apps.nowinandroid.core.domain
 
+import androidx.tracing.trace
 import com.google.samples.apps.nowinandroid.core.data.repository.TopicsRepository
 import com.google.samples.apps.nowinandroid.core.data.repository.UserDataRepository
 import com.google.samples.apps.nowinandroid.core.domain.TopicSortField.NAME
@@ -46,6 +47,7 @@ class GetFollowableTopicsUseCase @Inject constructor(
         userDataRepository.userData,
         topicsRepository.getTopics(),
     ) { userData, topics ->
+        trace("GetFollowableTopicsUseCase.invoke") {
             val followedTopics = topics
                 .map { topic ->
                     FollowableTopic(
@@ -57,6 +59,7 @@ class GetFollowableTopicsUseCase @Inject constructor(
                 NAME -> followedTopics.sortedBy { it.topic.name }
                 else -> followedTopics
             }
+        }
     }.flowOn(defaultDispatcher)
 }
 

core/domain/src/main/kotlin/com/google/samples/apps/nowinandroid/core/domain/GetSearchContentsUseCase.kt

@@ -16,6 +16,7 @@
 
 package com.google.samples.apps.nowinandroid.core.domain
 
+import androidx.tracing.trace
 import com.google.samples.apps.nowinandroid.core.data.repository.SearchContentsRepository
 import com.google.samples.apps.nowinandroid.core.data.repository.UserDataRepository
 import com.google.samples.apps.nowinandroid.core.model.data.FollowableTopic
@@ -52,6 +53,7 @@ private fun Flow<SearchResult>.mapToUserSearchResult(
     defaultDispatcher: CoroutineDispatcher,
 ): Flow<UserSearchResult> =
     combine(userDataStream) { searchResult, userData ->
+        trace("Flow<SearchResult>.mapToUserSearchResult") {
             UserSearchResult(
                 topics = searchResult.topics.map { topic ->
                     FollowableTopic(
@@ -66,4 +68,5 @@ private fun Flow<SearchResult>.mapToUserSearchResult(
                     )
                 },
             )
+        }
     }.flowOn(defaultDispatcher)