feature: implement onboarding flow for first-time users

data/preferences/src/commonMain/kotlin/bzh/ajaury/chombev/preferences/data/InMemoryPreferencesRepository.kt

@@ -20,6 +20,9 @@ internal class InMemoryPreferencesRepository : PreferencesRepository {
     private val playbackState = MutableStateFlow(PlaybackPreferences())
     override val playbackPreferences: StateFlow<PlaybackPreferences> = playbackState.asStateFlow()
 
+    private val onboardingCompletedState = MutableStateFlow(false)
+    override val onboardingCompleted: StateFlow<Boolean> = onboardingCompletedState.asStateFlow()
+
     override suspend fun setShowTranscription(enabled: Boolean) {
         subtitleState.update { it.copy(showTranscription = enabled) }
     }
@@ -47,4 +50,8 @@ internal class InMemoryPreferencesRepository : PreferencesRepository {
     override suspend fun setAutoPause(enabled: Boolean) {
         playbackState.update { it.copy(autoPause = enabled) }
     }
+
+    override suspend fun setOnboardingCompleted() {
+        onboardingCompletedState.value = true
+    }
 }

data/preferences/src/commonMain/kotlin/bzh/ajaury/chombev/preferences/domain/PreferencesRepository.kt

@@ -10,6 +10,8 @@ interface PreferencesRepository {
 
     val playbackPreferences: Flow<PlaybackPreferences>
 
+    val onboardingCompleted: Flow<Boolean>
+
     suspend fun setShowTranscription(enabled: Boolean)
 
     suspend fun setShowTranslation(enabled: Boolean)
@@ -23,4 +25,6 @@ interface PreferencesRepository {
     suspend fun setBreakBetweenPhrases(duration: Duration)
 
     suspend fun setAutoPause(enabled: Boolean)
+
+    suspend fun setOnboardingCompleted()
 }

data/preferences/src/dataStoreMain/kotlin/bzh/ajaury/chombev/preferences/data/DataStorePreferencesRepository.kt

@@ -31,6 +31,10 @@ internal class DataStorePreferencesRepository(
         dataStore.data
             .map { it.toPlaybackPreferences() }
 
+    override val onboardingCompleted: Flow<Boolean> =
+        dataStore.data
+            .map { it[OnboardingCompletedKey] ?: false }
+
     override suspend fun setShowTranscription(enabled: Boolean) = edit { it[ShowTranscriptionKey] = enabled }
 
     override suspend fun setShowTranslation(enabled: Boolean) = edit { it[ShowTranslationKey] = enabled }
@@ -46,6 +50,8 @@ internal class DataStorePreferencesRepository(
 
     override suspend fun setAutoPause(enabled: Boolean) = edit { it[AutoPauseKey] = enabled }
 
+    override suspend fun setOnboardingCompleted() = edit { it[OnboardingCompletedKey] = true }
+
     private suspend fun edit(transform: (MutablePreferences) -> Unit) {
         dataStore.edit(transform)
     }
@@ -76,5 +82,6 @@ internal class DataStorePreferencesRepository(
         val PlaybackSpeedKey = floatPreferencesKey("playback_speed")
         val BreakBetweenPhrasesSecondsKey = intPreferencesKey("break_between_phrases_seconds")
         val AutoPauseKey = booleanPreferencesKey("auto_pause")
+        val OnboardingCompletedKey = booleanPreferencesKey("onboarding_completed")
     }
 }