Refresh snode pool at least once a day

Changes from cfb7ff529

app/src/main/java/org/thoughtcrime/securesms/loki/api/ClosedGroupPoller.kt

@@ -29,7 +29,7 @@ class ClosedGroupPoller private constructor(private val context: Context, privat
 
     // region Settings
     companion object {
-        private val pollInterval: Long = 2 * 1000
+        private val pollInterval: Long = 4 * 1000
 
         public lateinit var shared: ClosedGroupPoller
 

app/src/main/java/org/thoughtcrime/securesms/loki/database/LokiAPIDatabase.kt

@@ -9,6 +9,8 @@ import org.thoughtcrime.securesms.loki.utilities.*
 import org.session.libsignal.service.loki.api.Snode
 import org.session.libsignal.service.loki.database.LokiAPIDatabaseProtocol
 import org.session.libsignal.service.loki.protocol.shelved.multidevice.DeviceLink
+import org.thoughtcrime.securesms.util.TextSecurePreferences
+import java.util.*
 
 class LokiAPIDatabase(context: Context, helper: SQLCipherOpenHelper) : Database(context, helper), LokiAPIDatabaseProtocol {
 
@@ -375,6 +377,16 @@ class LokiAPIDatabase(context: Context, helper: SQLCipherOpenHelper) : Database(
         return database.delete(openGroupProfilePictureTable, "$publicChatID = ?", arrayOf(index)) > 0
     }
 
+    override fun getLastSnodePoolRefreshDate(): Date? {
+        val time = TextSecurePreferences.getLastSnodePoolRefreshDate(context)
+        if (time <= 0) { return null }
+        return Date(time)
+    }
+
+    override fun setLastSnodePoolRefreshDate(date: Date) {
+        TextSecurePreferences.setLastSnodePoolRefreshDate(context, date)
+    }
+
     // region Deprecated
     override fun getDeviceLinks(publicKey: String): Set<DeviceLink> {
         return setOf()

app/src/main/java/org/thoughtcrime/securesms/util/TextSecurePreferences.java

@@ -23,6 +23,7 @@ import java.io.IOException;
 import java.security.SecureRandom;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.Date;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
@@ -1237,6 +1238,14 @@ public class TextSecurePreferences {
   public static void setHasSeenLightThemeIntroSheet(Context context) {
     setBooleanPreference(context, "has_seen_light_theme_intro_sheet", true);
   }
+
+  public static long getLastSnodePoolRefreshDate(Context context) {
+    return getLongPreference(context, "last_snode_pool_refresh_date", 0);
+  }
+
+  public static void setLastSnodePoolRefreshDate(Context context, Date date) {
+    setLongPreference(context, "last_snode_pool_refresh_date", date.getTime());
+  }
   // endregion
 
   // region Backup related

libsignal/src/main/java/org/session/libsignal/service/loki/api/SwarmAPI.kt

@@ -11,6 +11,7 @@ import org.session.libsignal.service.loki.database.LokiAPIDatabaseProtocol
 import org.session.libsignal.service.loki.utilities.getRandomElement
 import org.session.libsignal.service.loki.utilities.prettifiedDescription
 import java.security.SecureRandom
+import java.util.*
 
 class SwarmAPI private constructor(private val database: LokiAPIDatabaseProtocol) {
     internal var snodeFailureCount: MutableMap<Snode, Int> = mutableMapOf()
@@ -46,7 +47,12 @@ class SwarmAPI private constructor(private val database: LokiAPIDatabaseProtocol
     // region Swarm API
     internal fun getRandomSnode(): Promise<Snode, Exception> {
         val snodePool = this.snodePool
-        if (snodePool.count() < minimumSnodePoolCount) {
+        val lastRefreshDate = database.getLastSnodePoolRefreshDate()
+        val now = Date()
+        val needsRefresh = (snodePool.count() < minimumSnodePoolCount) || lastRefreshDate == null  || (now.time - lastRefreshDate.time) > 24 * 60 * 60 * 1000
+        if (needsRefresh) {
+            database.setLastSnodePoolRefreshDate(now)
+
             val target = seedNodePool.random()
             val url = "$target/json_rpc"
             Log.d("Loki", "Populating snode pool using: $target.")

libsignal/src/main/java/org/session/libsignal/service/loki/database/LokiAPIDatabaseProtocol.kt

@@ -2,6 +2,7 @@ package org.session.libsignal.service.loki.database
 
 import org.session.libsignal.service.loki.api.Snode
 import org.session.libsignal.service.loki.protocol.shelved.multidevice.DeviceLink
+import java.util.*
 
 interface LokiAPIDatabaseProtocol {
 
@@ -31,6 +32,9 @@ interface LokiAPIDatabaseProtocol {
     fun setOpenGroupPublicKey(server: String, newValue: String)
     fun setOpenGroupProfilePictureURL(group: Long, server: String, newValue: String)
     fun getOpenGroupProfilePictureURL(group: Long, server: String): String?
+    fun getLastSnodePoolRefreshDate(): Date?
+    fun setLastSnodePoolRefreshDate(newValue: Date)
+
 
     // region Deprecated
     fun getDeviceLinks(publicKey: String): Set<DeviceLink>