checkbox for auto downloading all files when connected to wifi

src/main/java/eu/siacs/conversations/services/AbstractConnectionManager.java

@@ -1,6 +1,10 @@
 package eu.siacs.conversations.services;
 
 import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkInfo;
 import android.os.PowerManager;
 import android.os.SystemClock;
 import android.util.Log;
@@ -121,6 +125,33 @@ public class AbstractConnectionManager {
 
     public long getAutoAcceptFileSize() {
         final long autoAcceptFileSize = this.mXmppConnectionService.getLongPreference("auto_accept_file_size", R.integer.auto_accept_filesize);
+        final boolean acceptAllOnWifi = this.mXmppConnectionService.getBooleanPreference("accept_all_files_if_wifi", R.bool.accept_all_files_if_wifi);
+
+        if (acceptAllOnWifi) {
+            boolean connectedToUnmeteredWifi = false;
+            ConnectivityManager manager = (ConnectivityManager) mXmppConnectionService.getApplication().getSystemService(Context.CONNECTIVITY_SERVICE);
+
+            NetworkCapabilities capabilities = null;
+            NetworkInfo networkInfo = null;
+            Network network = manager.getActiveNetwork();
+            if (network != null) {
+                capabilities = manager.getNetworkCapabilities(network);
+                networkInfo = manager.getNetworkInfo(network);
+            } else {
+                networkInfo = manager.getActiveNetworkInfo();
+            }
+
+            if (capabilities != null) {
+                connectedToUnmeteredWifi = capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);
+            } else if (networkInfo != null) {
+                connectedToUnmeteredWifi = networkInfo.getType() == ConnectivityManager.TYPE_WIFI && !manager.isActiveNetworkMetered();
+            }
+
+            if (connectedToUnmeteredWifi) {
+                return Long.MAX_VALUE;
+            }
+        }
+
         return autoAcceptFileSize <= 0 ? -1 : autoAcceptFileSize;
     }
 

src/main/res/values/defaults.xml

@@ -43,6 +43,7 @@
     <string name="omemo_setting_default">default_off</string>
     <string name="default_font_size">small</string>
     <bool name="use_share_location_plugin">false</bool>
+    <bool name="accept_all_files_if_wifi">false</bool>
     <bool name="start_searching">false</bool>
     <string name="video_compression">360</string>
     <string name="default_channel_discovery">JABBER_NETWORK</string>

src/main/res/values/strings.xml

@@ -114,6 +114,8 @@
     <string name="pref_general">General</string>
     <string name="pref_accept_files">Accept files</string>
     <string name="pref_accept_files_summary">Automatically accept files smaller than…</string>
+    <string name="pref_accept_all_files_if_wifi">Accept all files</string>
+    <string name="pref_accept_all_files_if_wifi_summary">Automatically accept all files when connected to Wi-Fi</string>
     <string name="pref_attachments">Attachments</string>
     <string name="pref_notification_settings">Notification</string>
     <string name="pref_vibrate">Vibrate</string>

src/main/res/xml/preferences.xml

@@ -164,6 +164,11 @@
             android:key="auto_accept_file_size"
             android:summary="@string/pref_accept_files_summary"
             android:title="@string/pref_accept_files" />
+        <CheckBoxPreference
+            android:defaultValue="@bool/use_share_location_plugin"
+            android:key="accept_all_files_if_wifi"
+            android:summary="@string/pref_accept_all_files_if_wifi_summary"
+            android:title="@string/pref_accept_all_files_if_wifi" />
     </PreferenceCategory>
     <PreferenceCategory android:title="@string/pref_ui_options">
         <CheckBoxPreference