fix(internal): ensure continuous history on app startup

app/src/main/java/org/nsh07/pomodoro/data/StatDao.kt

@@ -44,4 +44,7 @@ interface StatDao {
 
     @Query("SELECT EXISTS (SELECT * FROM stat WHERE date = :date)")
     suspend fun statExists(date: String): Boolean
+
+    @Query("SELECT date FROM stat ORDER BY date DESC LIMIT 1")
+    suspend fun getLastDate(): String?
 }

app/src/main/java/org/nsh07/pomodoro/data/StatRepository.kt

@@ -20,6 +20,8 @@ import java.time.LocalTime
  * ViewModel
  */
 interface StatRepository {
+    suspend fun insertStat(stat: Stat)
+
     suspend fun addFocusTime(focusTime: Long)
 
     suspend fun addBreakTime(breakTime: Long)
@@ -29,6 +31,8 @@ interface StatRepository {
     fun getLastWeekStatsSummary(): Flow<List<StatSummary>>
 
     fun getAverageFocusTimes(): Flow<StatFocusTime?>
+
+    suspend fun getLastDate(): String?
 }
 
 /**
@@ -38,6 +42,8 @@ class AppStatRepository(
     private val statDao: StatDao,
     private val ioDispatcher: CoroutineDispatcher = Dispatchers.IO
 ) : StatRepository {
+    override suspend fun insertStat(stat: Stat) = statDao.insertStat(stat)
+
     override suspend fun addFocusTime(focusTime: Long) = withContext(ioDispatcher) {
         val currentDate = LocalDate.now().toString()
         val currentTime = LocalTime.now().toSecondOfDay()
@@ -99,4 +105,6 @@ class AppStatRepository(
         statDao.getLastWeekStatsSummary()
 
     override fun getAverageFocusTimes(): Flow<StatFocusTime?> = statDao.getAvgFocusTimes()
+
+    override suspend fun getLastDate(): String? = statDao.getLastDate()
 }

app/src/main/java/org/nsh07/pomodoro/ui/timerScreen/viewModel/TimerViewModel.kt

@@ -25,9 +25,11 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import org.nsh07.pomodoro.TomatoApplication
 import org.nsh07.pomodoro.data.PreferenceRepository
+import org.nsh07.pomodoro.data.Stat
 import org.nsh07.pomodoro.data.StatRepository
 import org.nsh07.pomodoro.data.TimerRepository
 import org.nsh07.pomodoro.utils.millisecondsToStr
+import java.time.LocalDate
 
 @OptIn(FlowPreview::class)
 class TimerViewModel(
@@ -83,6 +85,15 @@ class TimerViewModel(
 
             resetTimer()
 
+            var lastDate = LocalDate.parse(statRepository.getLastDate())
+            val today = LocalDate.now()
+
+            // Fills dates between today and lastDate with 0s to ensure continuous history
+            while (lastDate.until(today).days > 0) {
+                lastDate = lastDate.plusDays(1)
+                statRepository.insertStat(Stat(lastDate.toString(), 0, 0, 0, 0, 0))
+            }
+
             delay(1500)
 
             _timerState.update { currentState ->