Added ability to ignore unknown senders

sbapp/main.py

@@ -1258,6 +1258,10 @@ class SidebandApp(MDApp):
                 self.sideband.config["propagation_by_default"] = self.root.ids.settings_lxmf_delivery_by_default.active
                 self.sideband.save_configuration()
 
+            def save_lxmf_ignore_unknown(sender=None, event=None):
+                self.sideband.config["lxmf_ignore_unknown"] = self.root.ids.settings_lxmf_ignore_unknown.active
+                self.sideband.save_configuration()
+
             def save_lxmf_sync_limit(sender=None, event=None):
                 self.sideband.config["lxmf_sync_limit"] = self.root.ids.settings_lxmf_sync_limit.active
                 self.sideband.save_configuration()
@@ -1333,6 +1337,9 @@ class SidebandApp(MDApp):
             self.root.ids.settings_lxmf_delivery_by_default.active = self.sideband.config["propagation_by_default"]
             self.root.ids.settings_lxmf_delivery_by_default.bind(active=save_lxmf_delivery_by_default)
 
+            self.root.ids.settings_lxmf_ignore_unknown.active = self.sideband.config["lxmf_ignore_unknown"]
+            self.root.ids.settings_lxmf_ignore_unknown.bind(active=save_lxmf_ignore_unknown)
+
             self.root.ids.settings_lxmf_periodic_sync.active = self.sideband.config["lxmf_periodic_sync"]
             self.root.ids.settings_lxmf_periodic_sync.bind(active=save_lxmf_periodic_sync)
             save_lxmf_periodic_sync(save=False)

sbapp/sideband/core.py

@@ -321,6 +321,8 @@ class SidebandCore():
             self.config["dark_ui"] = True
         if not "lxmf_periodic_sync" in self.config:
             self.config["lxmf_periodic_sync"] = False
+        if not "lxmf_ignore_unknown" in self.config:
+            self.config["lxmf_ignore_unknown"] = False
         if not "lxmf_sync_interval" in self.config:
             self.config["lxmf_sync_interval"] = 43200
         if not "notifications_on" in self.config:
@@ -2148,6 +2150,12 @@ class SidebandCore():
         RNS.log("LXMF delivery "+str(time_string)+". "+str(signature_string)+".")
 
         try:
+            if self.config["lxmf_ignore_unknown"] == True:
+                context_dest = message.source_hash
+                if self._db_conversation(context_dest) == None:
+                    RNS.log("Dropping message from unknown sender "+RNS.prettyhexrep(context_dest), RNS.LOG_DEBUG)
+                    return
+
             self.lxm_ingest(message)
         except Exception as e:
             RNS.log("Error while ingesting LXMF message "+RNS.prettyhexrep(message.hash)+" to database: "+str(e))

sbapp/ui/layouts.py

@@ -1111,6 +1111,22 @@ MDNavigationLayout:
                                     disabled: False
                                     active: False
 
+                            MDBoxLayout:
+                                orientation: "horizontal"
+                                size_hint_y: None
+                                padding: [0,0,dp(24),dp(0)]
+                                height: dp(48)
+                                
+                                MDLabel:
+                                    text: "Ignore unknown senders"
+                                    font_style: "H6"
+
+                                MDSwitch:
+                                    id: settings_lxmf_ignore_unknown
+                                    pos_hint: {"center_y": 0.3}
+                                    disabled: False
+                                    active: False
+
                             MDBoxLayout:
                                 orientation: "horizontal"
                                 size_hint_y: None