remember which calendars should be checked at caldav sync

app/src/main/kotlin/com/simplemobiletools/calendar/dialogs/SelectCalendarsDialog.kt

@@ -2,8 +2,12 @@ package com.simplemobiletools.calendar.dialogs
 
 import android.app.Activity
 import android.support.v7.app.AlertDialog
+import android.support.v7.widget.SwitchCompat
+import android.text.TextUtils
 import android.view.ViewGroup
+import android.widget.RelativeLayout
 import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.extensions.config
 import com.simplemobiletools.calendar.extensions.getCalDAVCalendars
 import com.simplemobiletools.commons.extensions.setupDialogStuff
 import kotlinx.android.synthetic.main.calendar_item_account.view.*
@@ -16,6 +20,7 @@ class SelectCalendarsDialog(val activity: Activity, val callback: (calendars: In
     var view = (activity.layoutInflater.inflate(R.layout.dialog_select_calendars, null) as ViewGroup)
 
     init {
+        val ids = activity.config.caldavSyncedCalendarIDs.split(",") as ArrayList<String>
         val calendars = activity.getCalDAVCalendars()
         val sorted = calendars.sortedWith(compareBy({ it.accountName }, { it.displayName }))
         sorted.forEach {
@@ -24,7 +29,7 @@ class SelectCalendarsDialog(val activity: Activity, val callback: (calendars: In
                 addCalendarItem(false, it.accountName)
             }
 
-            addCalendarItem(true, it.displayName)
+            addCalendarItem(true, it.displayName, it.id, ids.contains(it.id.toString()))
         }
 
         dialog = AlertDialog.Builder(activity)
@@ -35,14 +40,18 @@ class SelectCalendarsDialog(val activity: Activity, val callback: (calendars: In
         }
     }
 
-    private fun addCalendarItem(isEvent: Boolean, text: String) {
+    private fun addCalendarItem(isEvent: Boolean, text: String, tag: Long = 0L, shouldCheck: Boolean = false) {
         val calendarItem = activity.layoutInflater.inflate(if (isEvent) R.layout.calendar_item_calendar else R.layout.calendar_item_account,
                 view.dialog_select_calendars_holder, false)
 
         if (isEvent) {
-            calendarItem.calendar_item_calendar_switch.text = text
-            calendarItem.setOnClickListener {
-                calendarItem.calendar_item_calendar_switch.toggle()
+            calendarItem.calendar_item_calendar_switch.apply {
+                this.tag = tag
+                this.text = text
+                isChecked = shouldCheck
+                calendarItem.setOnClickListener {
+                    toggle()
+                }
             }
         } else {
             calendarItem.calendar_item_account.text = text
@@ -52,6 +61,18 @@ class SelectCalendarsDialog(val activity: Activity, val callback: (calendars: In
     }
 
     private fun confirmSelection() {
+        val calendarIDs = ArrayList<Long>()
+        val childCnt = view.dialog_select_calendars_holder.childCount
+        for (i in 0..childCnt) {
+            val child = view.dialog_select_calendars_holder.getChildAt(i)
+            if (child is RelativeLayout) {
+                val check = child.getChildAt(0)
+                if (check is SwitchCompat && check.isChecked) {
+                    calendarIDs.add(check.tag as Long)
+                }
+            }
+        }
 
+        activity.config.caldavSyncedCalendarIDs = TextUtils.join(",", calendarIDs)
     }
 }

app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Config.kt

@@ -74,6 +74,10 @@ class Config(context: Context) : BaseConfig(context) {
         get() = prefs.getBoolean(CALDAV_SYNC, false)
         set(caldavSync) = prefs.edit().putBoolean(CALDAV_SYNC, caldavSync).apply()
 
+    var caldavSyncedCalendarIDs: String
+        get() = prefs.getString(CALDAV_SYNCED_CALENDAR_IDS, "")
+        set(calendarIDs) = prefs.edit().putString(CALDAV_SYNCED_CALENDAR_IDS, calendarIDs).apply()
+
     fun addDisplayEventType(type: String) {
         addDisplayEventTypes(HashSet<String>(Arrays.asList(type)))
     }

app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Constants.kt

@@ -42,6 +42,7 @@ val REMINDER_MINUTES = "reminder_minutes"
 val DISPLAY_EVENT_TYPES = "display_event_types"
 val FONT_SIZE = "font_size"
 val CALDAV_SYNC = "caldav_sync"
+val CALDAV_SYNCED_CALENDAR_IDS = "caldav_synced_calendar_ids"
 val SYNC_ACCOUNT_NAME = "sync_account_name"
 val SNOOZE_DELAY = "snooze_delay"
 val DISPLAY_PAST_EVENTS = "display_past_events"