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 ->
-            SearchResult(
-                topics = topics.map { it.asExternalModel() },
-                newsResources = newsResources.map { it.asExternalModel() },
-            )
+            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 ->
-            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
@@ -46,16 +47,18 @@ class GetFollowableTopicsUseCase @Inject constructor(
         userDataRepository.userData,
         topicsRepository.getTopics(),
     ) { userData, topics ->
-        val followedTopics = topics
-            .map { topic ->
-                FollowableTopic(
-                    topic = topic,
-                    isFollowed = topic.id in userData.followedTopics,
-                )
+        trace("GetFollowableTopicsUseCase.invoke") {
+            val followedTopics = topics
+                .map { topic ->
+                    FollowableTopic(
+                        topic = topic,
+                        isFollowed = topic.id in userData.followedTopics,
+                    )
+                }
+            when (sortBy) {
+                NAME -> followedTopics.sortedBy { it.topic.name }
+                else -> followedTopics
             }
-        when (sortBy) {
-            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
@@ -52,18 +53,20 @@ private fun Flow<SearchResult>.mapToUserSearchResult(
     defaultDispatcher: CoroutineDispatcher,
 ): Flow<UserSearchResult> =
     combine(userDataStream) { searchResult, userData ->
-        UserSearchResult(
-            topics = searchResult.topics.map { topic ->
-                FollowableTopic(
-                    topic = topic,
-                    isFollowed = topic.id in userData.followedTopics,
-                )
-            },
-            newsResources = searchResult.newsResources.map { news ->
-                UserNewsResource(
-                    newsResource = news,
-                    userData = userData,
-                )
-            },
-        )
+        trace("Flow<SearchResult>.mapToUserSearchResult") {
+            UserSearchResult(
+                topics = searchResult.topics.map { topic ->
+                    FollowableTopic(
+                        topic = topic,
+                        isFollowed = topic.id in userData.followedTopics,
+                    )
+                },
+                newsResources = searchResult.newsResources.map { news ->
+                    UserNewsResource(
+                        newsResource = news,
+                        userData = userData,
+                    )
+                },
+            )
+        }
     }.flowOn(defaultDispatcher)