Retain four months of selectable daily consumption

app/src/main/java/com/evsuite/abrp/ConsumptionTracker.java

@@ -55,6 +55,7 @@ final class ConsumptionTracker {
                 SharedPreferences.Editor daily = prefs.edit();
                 save(daily, dayKey, add(load(dayKey), km, kwh, hours, dsoc));
                 daily.commit();
+                pruneOldDays();
                 tripA = add(tripA, km, kwh, hours, dsoc);
                 tripB = add(tripB, km, kwh, hours, dsoc);
                 persist();
@@ -95,6 +96,28 @@ final class ConsumptionTracker {
         return result;
     }
 
+    synchronized Totals totalsForDay(LocalDate date) {
+        if (date == null || date.isAfter(LocalDate.now()) || date.isBefore(LocalDate.now().minusMonths(4)))
+            return zero();
+        return load("day_" + date);
+    }
+
+    private void pruneOldDays() {
+        LocalDate oldest = LocalDate.now().minusMonths(4);
+        SharedPreferences.Editor editor = null;
+        for (String key : prefs.getAll().keySet()) {
+            if (!key.startsWith("day_") || key.length() < 14) continue;
+            try {
+                LocalDate date = LocalDate.parse(key.substring(4, 14));
+                if (date.isBefore(oldest)) {
+                    if (editor == null) editor = prefs.edit();
+                    editor.remove(key);
+                }
+            } catch (RuntimeException ignored) { }
+        }
+        if (editor != null) editor.commit();
+    }
+
     /** Preserve anything gathered by 2.2.24 by treating its just-created counter as today. */
     private void migrateCalendarCounters() {
         if (prefs.getBoolean("rolling_days_migrated", false)) return;
@@ -103,6 +126,7 @@ final class ConsumptionTracker {
         if (old.km != 0 || old.kwh != 0 || old.hours != 0 || old.soc != 0)
             save(e, "day_" + LocalDate.now(), old);
         e.putBoolean("rolling_days_migrated", true).commit();
+        pruneOldDays();
     }
 
     private Totals load(String key) { return new Totals(bits(key,"km"), bits(key,"kwh"), bits(key,"h"), bits(key,"soc")); }

app/src/main/java/com/evsuite/abrp/MainActivity.java

@@ -110,8 +110,10 @@ public class MainActivity extends AppCompatActivity {
     private ConsumptionTracker consumptionTracker;
     private ConsumptionTracker.Period consumptionPeriod = ConsumptionTracker.Period.LIFETIME;
     private TextView consumptionDistance, consumptionEnergy, consumptionAverage,
-            consumptionSpeed, consumptionTime, consumptionSoc;
+            consumptionSpeed, consumptionTime, consumptionSoc, consumptionDailyHistory;
     private Button consumptionReset;
+    private MaterialButton consumptionDateButton;
+    private java.time.LocalDate selectedConsumptionDate = java.time.LocalDate.now();
     private TextView chargeStatus, chargeSoc, chargeVoltage, chargeCurrent, chargePower,
             chargeEnergy, chargeDuration, chargeCurveTable;
     private ChargingGraphView chargeGraph;
@@ -828,6 +830,10 @@ public class MainActivity extends AppCompatActivity {
         consumptionSpeed = consumptionPane.findViewById(R.id.consumption_speed);
         consumptionTime = consumptionPane.findViewById(R.id.consumption_time);
         consumptionSoc = consumptionPane.findViewById(R.id.consumption_soc);
+        consumptionDailyHistory = consumptionPane.findViewById(R.id.consumption_daily_history);
+        consumptionDateButton = consumptionPane.findViewById(R.id.consumption_date_button);
+        consumptionDateButton.setText(selectedConsumptionDate.toString());
+        consumptionDateButton.setOnClickListener(v -> showConsumptionDatePicker());
         consumptionReset = consumptionPane.findViewById(R.id.consumption_reset);
         bindPeriodButton(R.id.consumption_lifetime, ConsumptionTracker.Period.LIFETIME);
         bindPeriodButton(R.id.consumption_week, ConsumptionTracker.Period.WEEK);
@@ -923,6 +929,32 @@ public class MainActivity extends AppCompatActivity {
         consumptionTime.setText(String.format(java.util.Locale.getDefault(), "%d sa %02d dk",
                 minutes / 60, minutes % 60));
         consumptionSoc.setText(String.format(java.util.Locale.getDefault(), "%.1f %%", t.soc));
+        ConsumptionTracker.Totals day = consumptionTracker.totalsForDay(selectedConsumptionDate);
+        if (day.km == 0 && day.kwh == 0 && day.hours == 0 && day.soc == 0) {
+            consumptionDailyHistory.setText("Bu tarih için kayıt yok");
+        } else {
+            String average = day.km < 0.1 ? "—" : String.format(java.util.Locale.getDefault(),
+                    "%.1f kWh/100 km", day.kwh * 100d / day.km);
+            long dayMinutes = Math.round(day.hours * 60d);
+            consumptionDailyHistory.setText(String.format(java.util.Locale.getDefault(),
+                    "Mesafe       %.1f km\nEnerji       %.2f kWh\nOrtalama     %s\nSüre         %d sa %02d dk\nSOC farkı    %.1f %%",
+                    day.km, day.kwh, average, dayMinutes / 60, dayMinutes % 60, day.soc));
+        }
+    }
+
+    private void showConsumptionDatePicker() {
+        java.time.LocalDate selected = selectedConsumptionDate;
+        android.app.DatePickerDialog dialog = new android.app.DatePickerDialog(this,
+                (view, year, month, day) -> {
+                    selectedConsumptionDate = java.time.LocalDate.of(year, month + 1, day);
+                    consumptionDateButton.setText(selectedConsumptionDate.toString());
+                    refreshConsumption();
+                }, selected.getYear(), selected.getMonthValue() - 1, selected.getDayOfMonth());
+        java.time.ZoneId zone = java.time.ZoneId.systemDefault();
+        dialog.getDatePicker().setMaxDate(System.currentTimeMillis());
+        dialog.getDatePicker().setMinDate(java.time.LocalDate.now().minusMonths(4)
+                .atStartOfDay(zone).toInstant().toEpochMilli());
+        dialog.show();
     }
 
     /**