Calendar trigger

app/src/main/java/com/jens/automation2/ActivityManageTriggerCalendar.java

@@ -12,6 +12,7 @@ import android.widget.CompoundButton;
 import android.widget.EditText;
 import android.widget.LinearLayout;
 import android.widget.Spinner;
+import android.widget.TextView;
 
 import androidx.annotation.Nullable;
 
@@ -30,6 +31,7 @@ public class ActivityManageTriggerCalendar extends Activity
     Button bSaveTriggerCalendar;
     List<CheckBox> checkboxesCalendars = new ArrayList<>();
     final static String separator = ",";
+    TextView tvMissingCalendarHint;
 
     private static String[] directions;
     ArrayAdapter<String> directionSpinnerAdapter;
@@ -51,6 +53,8 @@ public class ActivityManageTriggerCalendar extends Activity
         chkCalendarAvailabilityOutOfOffice = (CheckBox)findViewById(R.id.chkCalendarAvailabilityOutOfOffice);
         chkCalendarAvailabilityWorkingElsewhere = (CheckBox)findViewById(R.id.chkCalendarAvailabilityWorkingElsewhere);
 
+        tvMissingCalendarHint = (TextView) findViewById(R.id.tvMissingCalendarHint);
+
         llCalendarSelection = (LinearLayout)findViewById(R.id.llCalendarSelection);
 
         etCalendarTitle = (EditText)findViewById(R.id.etCalendarTitle);
@@ -207,6 +211,8 @@ public class ActivityManageTriggerCalendar extends Activity
                     chkCalendarAvailabilityWorkingElsewhere.setChecked(true);
             }
 
+            List<String> usedCalendarIDs = new ArrayList<>();
+            List<String> unusedCalendarIDs = new ArrayList<>();
             for(CheckBox checkbox : checkboxesCalendars)
             {
                 int id = ((CalendarReceiver.AndroidCalendar)checkbox.getTag()).calendarId;
@@ -214,11 +220,27 @@ public class ActivityManageTriggerCalendar extends Activity
                 {
                     if(calId.equals(String.valueOf(id)))
                     {
+                        usedCalendarIDs.add(String.valueOf(id));
                         checkbox.setChecked(true);
                         break;
                     }
                 }
             }
+            for(String calId : calendars)
+            {
+                if(!Miscellaneous.arraySearch((ArrayList<String>) usedCalendarIDs, calId, false, true))
+                    unusedCalendarIDs.add(calId);
+            }
+            if(unusedCalendarIDs.size() > 0)
+            {
+                /*
+                    A calendar has been configured that has been deleted since. We cannot resolve it.
+                    It will be removed with the next save, but we should inform this user
+                    of these circumstances.
+                 */
+
+                tvMissingCalendarHint.setText(String.format(getResources().getString(R.string.calendarsMissingHint), Miscellaneous.explode(", ", (ArrayList<String>) unusedCalendarIDs)));
+            }
         }
     }
 }