Added a dialog for refreshing sources and configuring whether they should auto-refresh

app/src/main/java/com/frostnerd/smokescreen/dialog/HostSourceRefreshDialog.kt

+package com.frostnerd.smokescreen.dialog
+
+import android.content.Context
+import android.content.DialogInterface
+import androidx.appcompat.app.AlertDialog
+import com.frostnerd.smokescreen.R
+import com.frostnerd.smokescreen.getPreferences
+import kotlinx.android.synthetic.main.dialog_host_source_refresh.view.*
+
+/*
+ * Copyright (C) 2019 Daniel Wolf (Ch4t4r)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ * You can contact the developer at daniel.wolf@frostnerd.com.
+ */
+class HostSourceRefreshDialog(context:Context,
+                              runRefresh:() -> Unit):AlertDialog(context, context.getPreferences().theme.dialogStyle) {
+
+    init {
+        setTitle(R.string.dialog_hostsourcerefresh_title)
+        val view = layoutInflater.inflate(R.layout.dialog_host_source_refresh, null, false)
+        setView(view)
+        view.refreshNow.setOnClickListener {
+            runRefresh()
+        }
+        view.automaticRefresh.setOnCheckedChangeListener { _, isChecked ->
+            view.refreshWifiOnly.isEnabled = isChecked
+        }
+        view.automaticRefresh.isChecked = context.getPreferences().automaticHostRefresh
+        view.refreshWifiOnly.isChecked = context.getPreferences().automaticHostRefreshWifiOnly
+        setButton(DialogInterface.BUTTON_NEUTRAL, context.getString(R.string.all_close)) { dialog, _ ->
+            dialog.dismiss()
+        }
+        setButton(DialogInterface.BUTTON_POSITIVE, context.getString(android.R.string.ok)) { dialog, _ ->
+            dialog.dismiss()
+            context.getPreferences().automaticHostRefresh = view.automaticRefresh.isChecked
+            context.getPreferences().automaticHostRefreshWifiOnly = view.refreshWifiOnly.isChecked
+        }
+    }
+
+}
\ No newline at end of file

app/src/main/java/com/frostnerd/smokescreen/util/preferences/AppSettings.kt

@@ -243,6 +243,9 @@ class AppSettingsSharedPreferences(context: Context) : AppSettings, SimpleTypedP
 
     var vpnServiceState:VpnServiceState by enumPref("vpn_service_state", VpnServiceState.STOPPED)
     var ignoreServiceKilled:Boolean by booleanPref("ignore_service_killed", false)
+
+    var automaticHostRefresh:Boolean by booleanPref("automatic_host_refresh", false)
+    var automaticHostRefreshWifiOnly:Boolean by booleanPref("automatic_host_refresh_wifi_only", true)
 }
 
 fun AppSettings.Companion.fromSharedPreferences(context: Context): AppSettingsSharedPreferences {

app/src/main/res/layout/dialog_host_source_refresh.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:layout_width="match_parent"
+              android:paddingLeft="@dimen/dialog_horizontal_margin"
+              android:paddingRight="@dimen/dialog_horizontal_margin"
+              android:paddingTop="@dimen/dialog_vertical_margin"
+              android:paddingBottom="@dimen/dialog_vertical_margin"
+              android:layout_height="match_parent">
+
+    <CheckBox
+            android:layout_width="wrap_content"
+            android:text="@string/dialog_hostsourcerefresh_automatic_refresh"
+            android:textColor="?android:attr/textColor"
+            android:id="@+id/automaticRefresh"
+            android:layout_height="wrap_content"/>
+
+    <CheckBox
+            android:layout_width="wrap_content"
+            android:text="@string/dialog_hostsourcerefresh_wifi_only"
+            android:textColor="?android:attr/textColor"
+            android:id="@+id/refreshWifiOnly"
+            android:layout_height="wrap_content"/>
+
+    <Button
+            android:layout_width="match_parent"
+            android:background="@drawable/main_roundbuttons"
+            android:id="@+id/refreshNow"
+            android:text="@string/dialog_hostsourcerefresh_refresh_now"
+            style="@style/Base.Widget.AppCompat.Button.Borderless.Colored"
+            android:layout_height="wrap_content"/>
+
+</LinearLayout>
\ No newline at end of file

app/src/main/res/values/strings-dialog.xml

@@ -157,4 +157,10 @@
 
     <string name="dialog_overlaydetected_title">System-wide overlay detected</string>
     <string name="dialog_overlaydetected_message">There seems to be a system-wide overlay (e.g. a chat bubble, color- or nightfilter) active. Most device don\'t allow you to enable a VPN in this case.\n\nIf you can\'t click OK in the next dialog please disable the overlay.</string>
+
+    <string name="dialog_hostsourcerefresh_title">Refresh host sources</string>
+    <string name="dialog_hostsourcerefresh_automatic_refresh">Refresh host sources</string>
+    <string name="dialog_hostsourcerefresh_wifi_only">Refresh on WIFI only</string>
+    <string name="dialog_hostsourcerefresh_refresh_now">Refresh now</string>
+
 </resources>