Implement automatic dns option

app/src/main/java/ru/karasevm/privatednstoggle/DnsTileService.kt

@@ -44,8 +44,22 @@ class DnsTileService : TileService() {
         val dnsMode = Settings.Global.getString(contentResolver, "private_dns_mode")
         val dnsProvider = Settings.Global.getString(contentResolver, "private_dns_specifier")
 
+        val sharedPrefs = this.getSharedPreferences("app_prefs", 0)
+        val autoEnabled = sharedPrefs.getBoolean("auto_enabled", false)
+
+
         if (dnsMode.equals(DNS_MODE_OFF, ignoreCase = true)) {
 //            refreshTile(qsTile, Tile.STATE_INACTIVE, getString(R.string.dns_off), R.drawable.ic_off_black_24dp)
+            if (autoEnabled) {
+                changeTileState(
+                    qsTile,
+                    Tile.STATE_ACTIVE,
+                    getString(R.string.dns_auto),
+                    R.drawable.ic_auto_black_24dp,
+                    DNS_MODE_AUTO,
+                    dnsProvider
+                )
+            } else {
                 changeTileState(
                     qsTile,
                     Tile.STATE_ACTIVE,
@@ -54,6 +68,9 @@ class DnsTileService : TileService() {
                     DNS_MODE_PRIVATE,
                     getNextAddress(dnsProvider)
                 )
+
+            }
+
         } else if (dnsMode == null || dnsMode.equals(DNS_MODE_AUTO, ignoreCase = true)) {
             changeTileState(
                 qsTile,
@@ -101,13 +118,20 @@ class DnsTileService : TileService() {
                 getString(R.string.dns_off),
                 R.drawable.ic_off_black_24dp
             )
-        } else if (dnsMode == null || dnsMode.equals(DNS_MODE_AUTO, ignoreCase = true)) {
+        } else if (dnsMode == null) {
             refreshTile(
                 qsTile,
                 Tile.STATE_INACTIVE,
                 getString(R.string.dns_unknown),
                 R.drawable.ic_unknown_black_24dp
             )
+        } else if (dnsMode.equals(DNS_MODE_AUTO, ignoreCase = true)) {
+            refreshTile(
+                qsTile,
+                Tile.STATE_ACTIVE,
+                getString(R.string.dns_auto),
+                R.drawable.ic_auto_black_24dp
+            )
         } else if (dnsMode.equals(DNS_MODE_PRIVATE, ignoreCase = true)) {
             val dnsProvider = Settings.Global.getString(contentResolver, "private_dns_specifier")
             if (dnsProvider != null) {

app/src/main/java/ru/karasevm/privatednstoggle/MainActivity.kt

@@ -56,7 +56,11 @@ class MainActivity : AppCompatActivity(), AddServerDialogFragment.NoticeDialogLi
     }
 
     override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+
+        val curVal = sharedPrefs.getBoolean("auto_enabled", false)
         menuInflater.inflate(R.menu.menu_main, menu)
+        menu?.findItem(R.id.enable_auto)?.setChecked(curVal)
+
         return true
     }
 
@@ -104,6 +108,16 @@ class MainActivity : AppCompatActivity(), AddServerDialogFragment.NoticeDialogLi
             true
         }
 
+        R.id.enable_auto -> {
+            if (!item.isChecked){
+                Toast.makeText(this, R.string.auto_mode_clarification, Toast.LENGTH_LONG).show()
+            }
+            sharedPrefs.edit().putBoolean("auto_enabled", !item.isChecked).apply()
+            item.setChecked(!item.isChecked)
+
+            true
+        }
+
         else -> {
             // If we got here, the user's action was not recognized.
             // Invoke the superclass to handle it.

app/src/main/res/drawable/ic_auto_black_24dp.xml

@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:pathData="M13.925,14.369L10.121,14.369L9.267,16.738L8.032,16.738L11.499,7.659h1.048l3.473,9.079h-1.228zM10.483,13.383h3.087L12.023,9.137Z"
+      android:strokeWidth="1.06419"
+      android:fillColor="#000000"/>
+  <path
+      android:pathData="m12,6c2.62,0 4.88,1.86 5.39,4.43l0.3,1.5 1.53,0.11c1.56,0.1 2.78,1.41 2.78,2.96 0,1.65 -1.35,3 -3,3H6C3.79,18 2,16.21 2,14 2,11.95 3.53,10.24 5.56,10.03L6.63,9.92 7.13,8.97C8.08,7.14 9.94,6 12,6M12,4C9.11,4 6.6,5.64 5.35,8.04 2.34,8.36 0,10.91 0,14c0,3.31 2.69,6 6,6h13c2.76,0 5,-2.24 5,-5 0,-2.64 -2.05,-4.78 -4.65,-4.96C18.67,6.59 15.64,4 12,4Z"
+      android:fillColor="#000000"/>
+</vector>

app/src/main/res/menu/menu_main.xml

@@ -5,6 +5,11 @@
         android:icon="@drawable/ic_baseline_add_24"
         android:title="@string/menu_add"
         app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/enable_auto"
+        android:checkable="true"
+        android:title="@string/menu_auto_enabled"
+        app:showAsAction="never" />
     <item android:id="@+id/privacy_policy"
         android:title="@string/menu_privacy_policy"
         app:showAsAction="never" />

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

@@ -6,9 +6,10 @@
     <string name="dns_auto">Auto</string>
     <string name="dns_unknown">Unknown</string>
     <string name="add_server">Add Server</string>
-    <string name="add">Add</string>
     <string name="menu_add">Add</string>
     <string name="menu_privacy_policy">Privacy Policy</string>
+    <string name="menu_auto_enabled">Enable auto</string>
+    <string name="auto_mode_clarification">Automatic (opportunistic) DNS mode will now be available in the tile</string>
     <string name="cancel">Cancel</string>
     <string name="delete_question">Delete server?</string>
     <string name="delete">Delete</string>