add a helper function for scheduling all future events

app/src/main/kotlin/com/simplemobiletools/calendar/extensions/Context.kt

@@ -47,6 +47,13 @@ fun Context.updateListWidget() {
     }
 }
 
+fun Context.scheduleAllEvents() {
+    val events = dbHelper.getEventsAtReboot()
+    events.forEach {
+        scheduleNextEventReminder(it)
+    }
+}
+
 fun Context.scheduleNextEventReminder(event: Event) {
     if (event.getReminders().isEmpty())
         return

app/src/main/kotlin/com/simplemobiletools/calendar/receivers/BootCompletedReceiver.kt

@@ -3,17 +3,13 @@ package com.simplemobiletools.calendar.receivers
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import com.simplemobiletools.calendar.extensions.dbHelper
 import com.simplemobiletools.calendar.extensions.notifyRunningEvents
-import com.simplemobiletools.calendar.extensions.scheduleNextEventReminder
+import com.simplemobiletools.calendar.extensions.scheduleAllEvents
 
 class BootCompletedReceiver : BroadcastReceiver() {
 
     override fun onReceive(context: Context, arg1: Intent) {
-        val events = context.dbHelper.getEventsAtReboot()
-        for (event in events) {
-            context.scheduleNextEventReminder(event)
-        }
+        context.scheduleAllEvents()
         context.notifyRunningEvents()
     }
 }