open show on app launch setting when set

The launchNewSearchOrQuery seemed to be the best place to add check if we should launch the show on app setting. It does a lot of checking based on what's passed into the intent as far as I can see.

If there is no specialised launch happening then we check the show on app launch setting

1. If LastOpenedTab is set, we do nothing
2. If NewTabPage is set then we open a new tab
3. If SpecificPage is set we compare the url to the current selected tab, if it's not the same we open a new tab otherwise we do nothing

I had to expose selectedTab from the TabsDao so I could the tab in a synchronous fashion to check. I would have made the tabsDao.selectedTab() suspending but that would have meant changes elsewhere.

app/src/main/java/com/duckduckgo/app/browser/BrowserActivity.kt

@@ -364,6 +364,8 @@ open class BrowserActivity : DuckDuckGoActivity() {
                 return
             }
         }
+
+        viewModel.handleShowOnAppLaunchOption()
     }
 
     private fun configureObservers() {

app/src/main/java/com/duckduckgo/app/browser/BrowserViewModel.kt

@@ -20,11 +20,16 @@ import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
 import com.duckduckgo.anvil.annotations.ContributesRemoteFeature
 import com.duckduckgo.anvil.annotations.ContributesViewModel
 import com.duckduckgo.app.browser.defaultbrowsing.DefaultBrowserDetector
 import com.duckduckgo.app.browser.omnibar.OmnibarEntryConverter
 import com.duckduckgo.app.fire.DataClearer
+import com.duckduckgo.app.generalsettings.showonapplaunch.model.ShowOnAppLaunchOption.LastOpenedTab
+import com.duckduckgo.app.generalsettings.showonapplaunch.model.ShowOnAppLaunchOption.NewTabPage
+import com.duckduckgo.app.generalsettings.showonapplaunch.model.ShowOnAppLaunchOption.SpecificPage
+import com.duckduckgo.app.generalsettings.showonapplaunch.store.ShowOnAppLaunchOptionDataStore
 import com.duckduckgo.app.global.ApplicationClearDataState
 import com.duckduckgo.app.global.rating.AppEnjoymentPromptEmitter
 import com.duckduckgo.app.global.rating.AppEnjoymentPromptOptions
@@ -55,6 +60,7 @@ import com.duckduckgo.feature.toggles.api.Toggle
 import javax.inject.Inject
 import kotlin.coroutines.CoroutineContext
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 import timber.log.Timber
 
@@ -69,6 +75,7 @@ class BrowserViewModel @Inject constructor(
     private val dispatchers: DispatcherProvider,
     private val pixel: Pixel,
     private val skipUrlConversionOnNewTabFeature: SkipUrlConversionOnNewTabFeature,
+    private val showOnAppLaunchOptionDataStore: ShowOnAppLaunchOptionDataStore,
 ) : ViewModel(),
     CoroutineScope {
 
@@ -284,6 +291,21 @@ class BrowserViewModel @Inject constructor(
     fun onBookmarksActivityResult(url: String) {
         command.value = Command.OpenSavedSite(url)
     }
+
+    fun handleShowOnAppLaunchOption() {
+        viewModelScope.launch {
+            when (val option = showOnAppLaunchOptionDataStore.optionFlow.first()) {
+                LastOpenedTab -> Unit
+                NewTabPage -> onNewTabRequested()
+                is SpecificPage -> {
+                    val liveSelectedTabUrl = tabRepository.getSelectedTab()?.url
+                    if (liveSelectedTabUrl != option.url) {
+                        onOpenInNewTabRequested(option.url)
+                    }
+                }
+            }
+        }
+    }
 }
 
 /**

app/src/main/java/com/duckduckgo/app/tabs/model/TabDataRepository.kt

@@ -298,6 +298,9 @@ class TabDataRepository @Inject constructor(
         siteData.clear()
     }
 
+    override suspend fun getSelectedTab(): TabEntity? =
+        withContext(dispatchers.io()) { tabsDao.selectedTab() }
+
     override suspend fun select(tabId: String) {
         databaseExecutor().scheduleDirect {
             val selection = TabSelectionEntity(tabId = tabId)

browser-api/src/main/java/com/duckduckgo/app/tabs/model/TabRepository.kt

@@ -93,6 +93,8 @@ interface TabRepository {
 
     suspend fun deleteAll()
 
+    suspend fun getSelectedTab(): TabEntity?
+
     suspend fun select(tabId: String)
 
     fun updateTabPreviewImage(