Refactor FilterProvider for reuse

app/src/main/java/com/todoroo/astrid/timers/TimerFilterExposer.java

@@ -1,49 +0,0 @@
-/*
- * Copyright (c) 2012 Todoroo Inc
- *
- * See the file "LICENSE" for the full license governing this code.
- */
-
-package com.todoroo.astrid.timers;
-
-import android.content.Context;
-import com.todoroo.andlib.sql.Criterion;
-import com.todoroo.andlib.sql.QueryTemplate;
-import com.todoroo.astrid.api.Filter;
-import com.todoroo.astrid.dao.TaskDao;
-import com.todoroo.astrid.data.Task;
-import javax.inject.Inject;
-import org.jetbrains.annotations.Nullable;
-import org.tasks.R;
-import org.tasks.injection.ForApplication;
-
-/**
- * Exposes "working on" filter to the NavigationDrawerFragment
- *
- * @author Tim Su <tim@todoroo.com>
- */
-public final class TimerFilterExposer {
-
-  private final TaskDao taskDao;
-  private final Context context;
-
-  @Inject
-  public TimerFilterExposer(@ForApplication Context context, TaskDao taskDao) {
-    this.context = context;
-    this.taskDao = taskDao;
-  }
-
-  static Filter createFilter(Context context) {
-    Filter filter =
-        new Filter(
-            context.getString(R.string.TFE_workingOn),
-            new QueryTemplate()
-                .where(Criterion.and(Task.TIMER_START.gt(0), Task.DELETION_DATE.eq(0))));
-    filter.icon = R.drawable.ic_outline_timer_24px;
-    return filter;
-  }
-
-  public @Nullable Filter getFilters() {
-    return taskDao.activeTimers() == 0 ? null : createFilter(context);
-  }
-}

app/src/main/java/com/todoroo/astrid/timers/TimerPlugin.java

@@ -13,6 +13,8 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.res.Resources;
 import androidx.core.app.NotificationCompat;
+import com.todoroo.andlib.sql.Criterion;
+import com.todoroo.andlib.sql.QueryTemplate;
 import com.todoroo.andlib.utility.DateUtilities;
 import com.todoroo.astrid.api.Filter;
 import com.todoroo.astrid.dao.TaskDao;
@@ -86,7 +88,7 @@ public class TimerPlugin {
     if (count == 0) {
       notificationManager.cancel(Constants.NOTIFICATION_TIMER);
     } else {
-      Filter filter = TimerFilterExposer.createFilter(context);
+      Filter filter = createFilter(context);
       Intent notifyIntent = TaskIntents.getTaskListIntent(context, filter);
       notifyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
       PendingIntent pendingIntent =
@@ -109,4 +111,14 @@ public class TimerPlugin {
       notificationManager.notify(Constants.NOTIFICATION_TIMER, builder, false, false, false);
     }
   }
+
+  public static Filter createFilter(Context context) {
+    Filter filter =
+        new Filter(
+            context.getString(R.string.TFE_workingOn),
+            new QueryTemplate()
+                .where(Criterion.and(Task.TIMER_START.gt(0), Task.DELETION_DATE.eq(0))));
+    filter.icon = R.drawable.ic_outline_timer_24px;
+    return filter;
+  }
 }

app/src/main/java/org/tasks/activities/FilterSelectionActivity.java

@@ -120,7 +120,7 @@ public class FilterSelectionActivity extends InjectingAppCompatActivity {
 
   private void refresh() {
     disposables.add(
-        Single.fromCallable(() -> filterProvider.getItems(false))
+        Single.fromCallable(() -> filterProvider.getFilterPickerItems())
             .subscribeOn(Schedulers.io())
             .observeOn(AndroidSchedulers.mainThread())
             .subscribe(items -> filterAdapter.setData(items, selected)));

app/src/main/java/org/tasks/data/LocationDao.kt

@@ -4,6 +4,7 @@ import androidx.lifecycle.LiveData
 import androidx.room.*
 import io.reactivex.Single
 import org.tasks.filters.LocationFilters
+import org.tasks.time.DateTimeUtils.currentTimeMillis
 
 @Dao
 interface LocationDao {
@@ -107,5 +108,5 @@ interface LocationDao {
             + " LEFT JOIN tasks ON geofences.task = tasks._id AND tasks.completed = 0 AND tasks.deleted = 0 AND tasks.hideUntil < :now"
             + " GROUP BY places.uid"
             + " ORDER BY name COLLATE NOCASE ASC")
-    fun getPlaceFilters(now: Long): List<LocationFilters>
+    fun getPlaceFilters(now: Long = currentTimeMillis()): List<LocationFilters>
 }

app/src/main/java/org/tasks/data/TagDataDao.kt

@@ -8,6 +8,7 @@ import com.todoroo.astrid.helper.UUIDHelper
 import org.tasks.db.DbUtils
 import org.tasks.filters.AlphanumComparator
 import org.tasks.filters.TagFilters
+import org.tasks.time.DateTimeUtils.currentTimeMillis
 import java.util.*
 import kotlin.collections.HashSet
 
@@ -146,5 +147,5 @@ abstract class TagDataDao {
             + " LEFT JOIN tasks ON tags.task = tasks._id AND tasks.deleted = 0 AND tasks.completed = 0 AND tasks.hideUntil < :now"
             + " WHERE tagdata.name IS NOT NULL AND tagdata.name != ''"
             + " GROUP BY tagdata.remoteId")
-    abstract fun getTagFilters(now: Long): List<TagFilters>
+    abstract fun getTagFilters(now: Long = currentTimeMillis()): List<TagFilters>
 }

app/src/main/java/org/tasks/filters/FilterProvider.kt

@@ -3,15 +3,13 @@ package org.tasks.filters
 import android.content.Context
 import android.content.Intent
 import com.todoroo.andlib.utility.AndroidUtilities
-import com.todoroo.andlib.utility.DateUtilities
 import com.todoroo.astrid.api.CustomFilter
-import com.todoroo.astrid.api.Filter
 import com.todoroo.astrid.api.FilterListItem
 import com.todoroo.astrid.core.BuiltInFilterExposer
-import com.todoroo.astrid.timers.TimerFilterExposer
+import com.todoroo.astrid.dao.TaskDao
+import com.todoroo.astrid.timers.TimerPlugin
 import org.tasks.BuildConfig
 import org.tasks.R
-import org.tasks.Strings
 import org.tasks.activities.GoogleTaskListSettingsActivity
 import org.tasks.activities.TagSettingsActivity
 import org.tasks.billing.Inventory
@@ -25,14 +23,13 @@ import org.tasks.preferences.HelpAndFeedback
 import org.tasks.preferences.MainPreferences
 import org.tasks.preferences.Preferences
 import org.tasks.ui.NavigationDrawerFragment
-import java.util.*
 import javax.inject.Inject
 
 class FilterProvider @Inject constructor(
         @param:ForApplication private val context: Context,
         private val inventory: Inventory,
         private val builtInFilterExposer: BuiltInFilterExposer,
-        private val timerFilterExposer: TimerFilterExposer,
+        private val taskDao: TaskDao,
         private val filterDao: FilterDao,
         private val tagDataDao: TagDataDao,
         private val googleTaskListDao: GoogleTaskListDao,
@@ -43,255 +40,203 @@ class FilterProvider @Inject constructor(
     val listPickerItems: List<FilterListItem>
         get() {
             AndroidUtilities.assertNotMainThread()
-            val items: MutableList<FilterListItem> = ArrayList()
+            return googleTaskFilters(false).plus(caldavFilters(false))
-            for ((account, value) in googleTaskFilters) {
-                items.addAll(
-                        getSubmenu(
-                                account.account,
-                                !Strings.isNullOrEmpty(account.error),
-                                value,
-                                true,
-                                account.isCollapsed,
-                                SubheaderType.GOOGLE_TASKS,
-                                account.id))
-            }
-            for ((account, value) in caldavFilters) {
-                items.addAll(
-                        getSubmenu(
-                                account.name,
-                                !Strings.isNullOrEmpty(account.error),
-                                value,
-                                true,
-                                account.isCollapsed,
-                                SubheaderType.CALDAV,
-                                account.id))
-            }
-            return items
         }
 
-    private fun addFilters(items: MutableList<FilterListItem>, navigationDrawer: Boolean) {
+    val navDrawerItems: List<FilterListItem>
-        if (!preferences.getBoolean(R.string.p_filters_enabled, true)) {
+        get() {
-            return
+            AndroidUtilities.assertNotMainThread()
-        }
+            return arrayListOf(builtInFilterExposer.myTasksFilter)
-        items.addAll(getSubmenu(R.string.filters, R.string.p_collapse_filters) { filters })
+                    .plus(getAllFilters(true))
-        if (navigationDrawer && !preferences.getBoolean(R.string.p_collapse_filters, false)) {
+                    .plus(navDrawerFooter)
-            items.add(
-                    NavigationDrawerAction(
-                            context.getString(R.string.add_filter),
-                            R.drawable.ic_outline_add_24px,
-                            NavigationDrawerFragment.REQUEST_NEW_FILTER))
         }
-    }
 
-    private fun addTags(items: MutableList<FilterListItem>, navigationDrawer: Boolean) {
+    val filterPickerItems: List<FilterListItem>
-        if (!preferences.getBoolean(R.string.p_tags_enabled, true)) {
+        get() {
-            return
+            AndroidUtilities.assertNotMainThread()
-        }
+            return arrayListOf(builtInFilterExposer.myTasksFilter)
-        val collapsed = preferences.getBoolean(R.string.p_collapse_tags, false)
+                    .plus(getAllFilters(false))
-        var filters = if (collapsed) emptyList() else tagDataDao.getTagFilters(DateUtilities.now())
-        if (preferences.getBoolean(R.string.p_tags_hide_unused, false)) {
-            filters = filters.filter { it.count > 0 }
-        }
-        val tags = filters.map(TagFilters::toTagFilter).sortedWith(AlphanumComparator.FILTER)
-        items.addAll(
-                getSubmenu(
-                        context.getString(R.string.tags),
-                        false,
-                        tags,
-                        false,
-                        collapsed,
-                        SubheaderType.PREFERENCE,
-                        R.string.p_collapse_tags.toLong()))
-        if (navigationDrawer && !collapsed) {
-            items.add(
-                    NavigationDrawerAction(
-                            context.getString(R.string.new_tag),
-                            R.drawable.ic_outline_add_24px,
-                            Intent(context, TagSettingsActivity::class.java),
-                            NavigationDrawerFragment.REQUEST_NEW_LIST))
-        }
-    }
-
-    private fun addPlaces(items: MutableList<FilterListItem>, navigationDrawer: Boolean) {
-        if (!preferences.getBoolean(R.string.p_places_enabled, true)) {
-            return
-        }
-        val collapsed = preferences.getBoolean(R.string.p_collapse_locations, false)
-        var filters = if (collapsed) emptyList() else locationDao.getPlaceFilters(DateUtilities.now())
-        if (preferences.getBoolean(R.string.p_places_hide_unused, false)) {
-            filters = filters.filter { it.count > 0 }
-        }
-        items.addAll(
-                getSubmenu(
-                        context.getString(R.string.places),
-                        false,
-                        filters.map(LocationFilters::toLocationFilter),
-                        false,
-                        collapsed,
-                        SubheaderType.PREFERENCE,
-                        R.string.p_collapse_locations.toLong()))
-        if (navigationDrawer && !collapsed) {
-            items.add(
-                    NavigationDrawerAction(
-                            context.getString(R.string.add_place),
-                            R.drawable.ic_outline_add_24px,
-                            Intent(context, LocationPickerActivity::class.java),
-                            NavigationDrawerFragment.REQUEST_NEW_PLACE))
         }
-    }
 
-    fun getItems(navigationDrawer: Boolean): List<FilterListItem> {
+    private fun addFilters(showCreate: Boolean): List<FilterListItem> =
-        AndroidUtilities.assertNotMainThread()
+            if (!preferences.getBoolean(R.string.p_filters_enabled, true)) {
-        val items: MutableList<FilterListItem> = ArrayList()
+                emptyList()
-        items.add(builtInFilterExposer.myTasksFilter)
+            } else {
-        addFilters(items, navigationDrawer)
+                val collapsed = preferences.getBoolean(R.string.p_collapse_filters, false)
-        addTags(items, navigationDrawer)
+                listOf(
-        addPlaces(items, navigationDrawer)
+                        NavigationDrawerSubheader(
-        for ((account, value) in googleTaskFilters) {
+                                context.getString(R.string.filters),
-            items.addAll(
+                                false,
-                    getSubmenu(
+                                collapsed,
-                            account.account,
+                                SubheaderType.PREFERENCE,
-                            !Strings.isNullOrEmpty(account.error),
+                                R.string.p_collapse_filters.toLong()))
-                            value,
+                        .apply { if (collapsed) return this }
-                            !navigationDrawer,
+                        .plus(builtInFilterExposer.filters)
-                            account.isCollapsed,
+                        .plusIf(taskDao.activeTimers() > 0) { TimerPlugin.createFilter(context) }
-                            SubheaderType.GOOGLE_TASKS,
+                        .plus(filterDao.getFilters().map(::CustomFilter).sortedWith(AlphanumComparator.FILTER))
-                            account.id))
+                        .plusIf(showCreate) {
-            if (navigationDrawer && !account.isCollapsed) {
+                            NavigationDrawerAction(
-                items.add(
+                                    context.getString(R.string.add_filter),
-                        NavigationDrawerAction(
+                                    R.drawable.ic_outline_add_24px,
-                                context.getString(R.string.new_list),
+                                    NavigationDrawerFragment.REQUEST_NEW_FILTER)
-                                R.drawable.ic_outline_add_24px,
+                        }
-                                Intent(context, GoogleTaskListSettingsActivity::class.java)
-                                        .putExtra(GoogleTaskListSettingsActivity.EXTRA_ACCOUNT, account),
-                                NavigationDrawerFragment.REQUEST_NEW_LIST))
-            }
-        }
-        for ((account, value) in caldavFilters) {
-            if (account.accountType == TYPE_LOCAL && !preferences.getBoolean(R.string.p_lists_enabled, true)) {
-                continue
             }
-            items.addAll(
-                    getSubmenu(
-                            account.name,
-                            !Strings.isNullOrEmpty(account.error),
-                            value,
-                            !navigationDrawer,
-                            account.isCollapsed,
-                            SubheaderType.CALDAV,
-                            account.id))
-            if (navigationDrawer && !account.isCollapsed) {
-                items.add(
-                        NavigationDrawerAction(
-                                context.getString(R.string.new_list),
-                                R.drawable.ic_outline_add_24px,
-                                Intent(context, account.listSettingsClass())
-                                        .putExtra(BaseCaldavCalendarSettingsActivity.EXTRA_CALDAV_ACCOUNT, account),
-                                NavigationDrawerFragment.REQUEST_NEW_LIST))
-            }
-        }
-        if (navigationDrawer) {
-            items.add(NavigationDrawerSeparator())
-            @Suppress("ConstantConditionIf")
-            if (BuildConfig.FLAVOR == "generic") {
-                items.add(
-                        NavigationDrawerAction(
-                                context.getString(R.string.TLA_menu_donate),
-                                R.drawable.ic_outline_attach_money_24px,
-                                NavigationDrawerFragment.REQUEST_DONATE))
-            } else if (!inventory.hasPro()) {
-                items.add(
-                        NavigationDrawerAction(
-                                context.getString(R.string.name_your_price),
-                                R.drawable.ic_outline_attach_money_24px,
-                                NavigationDrawerFragment.REQUEST_PURCHASE))
-            }
-            items.add(
-                    NavigationDrawerAction(
-                            context.getString(R.string.TLA_menu_settings),
-                            R.drawable.ic_outline_settings_24px,
-                            Intent(context, MainPreferences::class.java),
-                            NavigationDrawerFragment.REQUEST_SETTINGS))
-            items.add(
-                    NavigationDrawerAction(
-                            context.getString(R.string.help_and_feedback),
-                            R.drawable.ic_outline_help_outline_24px,
-                            Intent(context, HelpAndFeedback::class.java),
-                            0))
-        }
-        return items
-    }
 
-    private val filters: List<Filter>
+    private fun addTags(showCreate: Boolean): List<FilterListItem> =
-        get() {
+            if (!preferences.getBoolean(R.string.p_tags_enabled, true)) {
-            val filters = ArrayList(builtInFilterExposer.filters)
+                emptyList()
-            val filter = timerFilterExposer.filters
+            } else {
-            if (filter != null) {
+                val collapsed = preferences.getBoolean(R.string.p_collapse_tags, false)
-                filters.add(filter)
+                listOf(
+                        NavigationDrawerSubheader(
+                                context.getString(R.string.tags),
+                                false,
+                                collapsed,
+                                SubheaderType.PREFERENCE,
+                                R.string.p_collapse_tags.toLong()))
+                        .apply { if (collapsed) return this }
+                        .plus(tagDataDao.getTagFilters()
+                                    .filterIf(preferences.getBoolean(R.string.p_tags_hide_unused, false)) {
+                                        it.count > 0
+                                    }
+                                    .map(TagFilters::toTagFilter)
+                                    .sortedWith(AlphanumComparator.FILTER))
+                        .plusIf(showCreate) {
+                            NavigationDrawerAction(
+                                    context.getString(R.string.new_tag),
+                                    R.drawable.ic_outline_add_24px,
+                                    Intent(context, TagSettingsActivity::class.java),
+                                    NavigationDrawerFragment.REQUEST_NEW_LIST)
+                        }
             }
-            filters.addAll(filterDao.getFilters()
-                    .map(::CustomFilter)
-                    .sortedWith(AlphanumComparator.FILTER))
-            return filters
-        }
 
-    private val googleTaskFilters: Set<Map.Entry<GoogleTaskAccount, List<Filter>>>
+    private fun addPlaces(showCreate: Boolean): List<FilterListItem> =
-        get() {
+            if (!preferences.getBoolean(R.string.p_places_enabled, true)) {
-            val accounts = googleTaskListDao.getAccounts()
+                emptyList()
-            val filters = LinkedHashMap<GoogleTaskAccount, List<Filter>>()
+            } else {
-            for (account in accounts) {
+                val collapsed = preferences.getBoolean(R.string.p_collapse_locations, false)
-                filters[account] = if (account.isCollapsed) {
+                listOf(
-                    emptyList()
+                        NavigationDrawerSubheader(
-                } else {
+                                context.getString(R.string.places),
-                    googleTaskListDao
+                                false,
-                            .getGoogleTaskFilters(account.account!!)
+                                collapsed,
-                            .map(GoogleTaskFilters::toGtasksFilter)
+                                SubheaderType.PREFERENCE,
-                            .sortedWith(AlphanumComparator.FILTER)
+                                R.string.p_collapse_locations.toLong()))
-                }
+                        .apply { if (collapsed) return this }
+                        .plus(locationDao.getPlaceFilters()
+                                    .filterIf(preferences.getBoolean(R.string.p_places_hide_unused, false)) {
+                                        it.count > 0
+                                    }
+                                    .map(LocationFilters::toLocationFilter)
+                                    .sortedWith(AlphanumComparator.FILTER))
+                        .plusIf(showCreate) {
+                            NavigationDrawerAction(
+                                    context.getString(R.string.add_place),
+                                    R.drawable.ic_outline_add_24px,
+                                    Intent(context, LocationPickerActivity::class.java),
+                                    NavigationDrawerFragment.REQUEST_NEW_PLACE)
+                        }
             }
-            return filters.entries
-        }
 
-    private val caldavFilters: Set<Map.Entry<CaldavAccount, List<Filter>>>
+    private fun getAllFilters(showCreate: Boolean): List<FilterListItem> =
-        get() {
+            addFilters(showCreate)
-            val accounts = caldavDao.getAccounts().ifEmpty {
+                    .plus(addTags(showCreate))
-                listOf(caldavDao.setupLocalAccount(context))
+                    .plus(addPlaces(showCreate))
-            }
+                    .plus(googleTaskFilters(showCreate))
-            val filters = LinkedHashMap<CaldavAccount, List<Filter>>()
+                    .plus(caldavFilters(showCreate))
-            for (account in accounts) {
+
-                if (account.accountType == TYPE_LOCAL) {
+    private val navDrawerFooter: List<FilterListItem>
-                    account.name = context.getString(R.string.lists)
+        get() = listOf(NavigationDrawerSeparator())
+                .plusIf(BuildConfig.FLAVOR == "generic") {
+                    NavigationDrawerAction(
+                            context.getString(R.string.TLA_menu_donate),
+                            R.drawable.ic_outline_attach_money_24px,
+                            NavigationDrawerFragment.REQUEST_DONATE)
                 }
-                filters[account] = if (account.isCollapsed) {
+                .plusIf(!inventory.hasPro()) {
-                    emptyList()
+                    NavigationDrawerAction(
-                } else {
+                            context.getString(R.string.name_your_price),
-                    caldavDao
+                            R.drawable.ic_outline_attach_money_24px,
-                            .getCaldavFilters(account.uuid!!)
+                            NavigationDrawerFragment.REQUEST_PURCHASE)
-                            .map(CaldavFilters::toCaldavFilter)
-                            .sortedWith(AlphanumComparator.FILTER)
                 }
-            }
+                .plus(NavigationDrawerAction(
-            return filters.entries
+                        context.getString(R.string.TLA_menu_settings),
-        }
+                        R.drawable.ic_outline_settings_24px,
+                        Intent(context, MainPreferences::class.java),
+                        NavigationDrawerFragment.REQUEST_SETTINGS))
+                .plus(NavigationDrawerAction(
+                        context.getString(R.string.help_and_feedback),
+                        R.drawable.ic_outline_help_outline_24px,
+                        Intent(context, HelpAndFeedback::class.java),
+                        0))
 
-    private fun getSubmenu(title: Int, prefId: Int, getFilters: () -> List<Filter>): List<FilterListItem> {
+    private fun googleTaskFilters(showCreate: Boolean = true): List<FilterListItem> =
-        val collapsed = preferences.getBoolean(prefId, false)
+            googleTaskListDao
-        val subheader = NavigationDrawerSubheader(context.getString(title), false, collapsed, SubheaderType.PREFERENCE, prefId.toLong())
+                    .getAccounts()
-        return listOf(subheader).plus(if (collapsed) emptyList() else getFilters.invoke())
+                    .flatMap {
-    }
+                        listOf(
+                                NavigationDrawerSubheader(
+                                        it.account,
+                                        it.error?.isNotBlank() ?: false,
+                                        it.isCollapsed,
+                                        SubheaderType.GOOGLE_TASKS,
+                                        it.id))
+                                .plusAllIf(!it.isCollapsed) {
+                                    googleTaskListDao
+                                            .getGoogleTaskFilters(it.account!!)
+                                            .map(GoogleTaskFilters::toGtasksFilter)
+                                            .sortedWith(AlphanumComparator.FILTER)
+                                }
+                                .plusIf(showCreate && !it.isCollapsed) {
+                                    NavigationDrawerAction(
+                                            context.getString(R.string.new_list),
+                                            R.drawable.ic_outline_add_24px,
+                                            Intent(context, GoogleTaskListSettingsActivity::class.java)
+                                                    .putExtra(GoogleTaskListSettingsActivity.EXTRA_ACCOUNT, it),
+                                            NavigationDrawerFragment.REQUEST_NEW_LIST)
+                                }
+                    }
 
-    private fun getSubmenu(
+    private fun caldavFilters(showCreate: Boolean = true): List<FilterListItem> =
-            title: String?,
+            caldavDao.getAccounts()
-            error: Boolean,
+                    .ifEmpty { listOf(caldavDao.setupLocalAccount(context)) }
-            filters: List<Filter>,
+                    .filter { it.accountType != TYPE_LOCAL || preferences.getBoolean(R.string.p_lists_enabled, true) }
-            hideIfEmpty: Boolean,
+                    .flatMap {
-            collapsed: Boolean,
+                        listOf(
-            type: SubheaderType,
+                                NavigationDrawerSubheader(
-            id: Long): List<FilterListItem> {
+                                        if (it.accountType == TYPE_LOCAL) {
-        return if (hideIfEmpty && filters.isEmpty() && !collapsed) {
+                                            context.getString(R.string.lists)
-            listOf()
+                                        } else {
-        } else {
+                                            it.name
-            listOf(NavigationDrawerSubheader(title, error, collapsed, type, id)).plus(filters)
+                                        },
-        }
+                                        it.error?.isNotBlank() ?: false,
+                                        it.isCollapsed,
+                                        SubheaderType.CALDAV,
+                                        it.id))
+                                .plusAllIf(!it.isCollapsed) {
+                                    caldavDao
+                                            .getCaldavFilters(it.uuid!!)
+                                            .map(CaldavFilters::toCaldavFilter)
+                                            .sortedWith(AlphanumComparator.FILTER)
+                                }
+                                .plusIf(showCreate && !it.isCollapsed) {
+                                    NavigationDrawerAction(
+                                            context.getString(R.string.new_list),
+                                            R.drawable.ic_outline_add_24px,
+                                            Intent(context, it.listSettingsClass())
+                                                    .putExtra(BaseCaldavCalendarSettingsActivity.EXTRA_CALDAV_ACCOUNT, it),
+                                            NavigationDrawerFragment.REQUEST_NEW_LIST)
+                                }
+                    }
+
+    companion object {
+        private fun <T> Collection<T>.plusAllIf(predicate: Boolean, item: () -> Iterable<T>): List<T> =
+                plus(if (predicate) item.invoke() else emptyList())
+
+        private fun <T> Collection<T>.plusIf(predicate: Boolean, item: () -> T): List<T> =
+                if (predicate) plus(item.invoke()) else this.toList()
+
+        private fun <T> Iterable<T>.filterIf(predicate: Boolean, predicate2: (T) -> Boolean): List<T> =
+                if (predicate) filter(predicate2) else this.toList()
     }
 }

app/src/main/java/org/tasks/ui/NavigationDrawerFragment.kt

@@ -152,7 +152,7 @@ class NavigationDrawerFragment : InjectingFragment() {
     }
 
     private fun updateFilters() =
-            Single.fromCallable { filterProvider.getItems(true) }
+            Single.fromCallable { filterProvider.navDrawerItems }
                 .map { items: List<FilterListItem> -> refreshFilterCount(items) }
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())