feat: Autoping availability warning

src/command/cmd_defs.c

@@ -1964,12 +1964,14 @@ static const struct cmd_t command_defs[] = {
               CMD_TAG_CONNECTION)
       CMD_SYN(
               "/autoping set <seconds>",
-              "/autoping timeout <seconds>")
+              "/autoping timeout <seconds>",
+              "/autoping warning enable|disable")
       CMD_DESC(
               "Set the interval between sending ping requests to the server to ensure the connection is kept alive.")
       CMD_ARGS(
               { "set <seconds>", "Number of seconds between sending pings, a value of 0 disables autoping." },
-              { "timeout <seconds>", "Seconds to wait for autoping responses, after which the connection is considered broken." })
+              { "timeout <seconds>", "Seconds to wait for autoping responses, after which the connection is considered broken." },
+              {"warning enable|disable", "Enable or disable autoping availability warning."})
     },
 
     { CMD_PREAMBLE("/ping",

src/command/cmd_funcs.c

@@ -6374,6 +6374,8 @@ cmd_autoping(ProfWin* window, const char* const command, gchar** args)
             cons_bad_cmd_usage(command);
         }
 
+    } else if (g_strcmp0(cmd, "warning") == 0) {
+        _cmd_set_boolean_preference(value, "Autoping availability warning", PREF_AUTOPING_WARNING);
     } else {
         cons_bad_cmd_usage(command);
     }

src/config/preferences.c

@@ -2290,6 +2290,7 @@ _get_group(preference_t pref)
     case PREF_TRAY:
     case PREF_TRAY_READ:
     case PREF_ADV_NOTIFY_DISCO_OR_VERSION:
+    case PREF_AUTOPING_WARNING:
         return PREF_GROUP_NOTIFICATIONS;
     case PREF_DBLOG:
     case PREF_CHLOG:
@@ -2646,6 +2647,8 @@ _get_key(preference_t pref)
         return "enabled";
     case PREF_SPELLCHECK_LANG:
         return "lang";
+    case PREF_AUTOPING_WARNING:
+        return "autoping.warning";
     default:
         return NULL;
     }
@@ -2699,6 +2702,7 @@ _get_default_boolean(preference_t pref)
     case PREF_MOOD:
     case PREF_STROPHE_SM_ENABLED:
     case PREF_STROPHE_SM_RESEND:
+    case PREF_AUTOPING_WARNING:
         return TRUE;
     case PREF_SPELLCHECK_ENABLE:
     case PREF_PGP_PUBKEY_AUTOIMPORT:

src/config/preferences.h

@@ -169,6 +169,7 @@ typedef enum {
     PREF_FORCE_ENCRYPTION_MODE,
     PREF_SPELLCHECK_ENABLE,
     PREF_SPELLCHECK_LANG,
+    PREF_AUTOPING_WARNING
 } preference_t;
 
 typedef struct prof_alias_t

src/ui/console.c

@@ -1703,6 +1703,11 @@ cons_notify_setting(void)
     else
         cons_show("Subscription requests (/notify sub) : OFF");
 
+    if (prefs_get_boolean(PREF_AUTOPING_WARNING))
+        cons_show("Autoping warning (/autoping warn)   : ON");
+    else
+        cons_show("Autoping warning (/autoping warn)   : OFF");
+
     gint remind_period = prefs_get_notify_remind();
     if (remind_period == 0) {
         cons_show("Reminder period (/notify remind)    : OFF");
@@ -2003,21 +2008,26 @@ cons_autoping_setting(void)
 {
     gint autoping_interval = prefs_get_autoping();
     if (autoping_interval == 0) {
-        cons_show("Autoping interval (/autoping)   : OFF");
+        cons_show("Autoping interval (/autoping)       : OFF");
     } else if (autoping_interval == 1) {
-        cons_show("Autoping interval (/autoping)   : 1 second");
+        cons_show("Autoping interval (/autoping)       : 1 second");
     } else {
-        cons_show("Autoping interval (/autoping)   : %d seconds", autoping_interval);
+        cons_show("Autoping interval (/autoping)       : %d seconds", autoping_interval);
     }
 
     gint autoping_timeout = prefs_get_autoping_timeout();
     if (autoping_timeout == 0) {
-        cons_show("Autoping timeout (/autoping)    : OFF");
+        cons_show("Autoping timeout (/autoping)        : OFF");
     } else if (autoping_timeout == 1) {
-        cons_show("Autoping timeout (/autoping)    : 1 second");
+        cons_show("Autoping timeout (/autoping)        : 1 second");
     } else {
-        cons_show("Autoping timeout (/autoping)    : %d seconds", autoping_timeout);
+        cons_show("Autoping timeout (/autoping)        : %d seconds", autoping_timeout);
     }
+
+    if (prefs_get_boolean(PREF_AUTOPING_WARNING))
+        cons_show("Autoping warning (/autoping warn)   : ON");
+    else
+        cons_show("Autoping warning (/autoping warn)   : OFF");
 }
 
 void

src/xmpp/iq.c

@@ -103,6 +103,7 @@ static void _ping_get_handler(xmpp_stanza_t* const stanza);
 static int _version_result_id_handler(xmpp_stanza_t* const stanza, void* const userdata);
 static int _disco_info_response_id_handler(xmpp_stanza_t* const stanza, void* const userdata);
 static int _disco_info_response_id_handler_onconnect(xmpp_stanza_t* const stanza, void* const userdata);
+static int _disco_autoping_warning_message(GHashTable* features);
 static int _http_upload_response_id_handler(xmpp_stanza_t* const stanza, void* const upload_ctx);
 static int _last_activity_response_id_handler(xmpp_stanza_t* const stanza, void* const userdata);
 static int _room_info_response_id_handler(xmpp_stanza_t* const stanza, void* const userdata);
@@ -2429,6 +2430,7 @@ _disco_info_response_id_handler_onconnect(xmpp_stanza_t* const stanza, void* con
             }
             child = xmpp_stanza_get_next(child);
         }
+        _disco_autoping_warning_message(features);
     }
 
     connection_features_received(from);
@@ -2436,6 +2438,22 @@ _disco_info_response_id_handler_onconnect(xmpp_stanza_t* const stanza, void* con
     return 0;
 }
 
+static int
+_disco_autoping_warning_message(GHashTable* features)
+{
+    gboolean server_supports_ping = g_hash_table_contains(features, "urn:xmpp:ping");
+    gboolean users_prefers_warning = prefs_get_boolean(PREF_AUTOPING_WARNING);
+    gboolean is_autoping_enabled = prefs_get_autoping() != 0;
+
+    if (!is_autoping_enabled && server_supports_ping && users_prefers_warning) {
+        cons_show("This server supports XEP-0199: XMPP Ping (better keepalive detection),\n"
+                  "but autoping feature is currently disabled in settings.\n"
+                  "Consider enabling it (e.g., `/autoping set 30`) for improved connection stability.\n"
+                  "Use `/autoping warn disable` to disable this message.");
+    }
+    return 0;
+}
+
 static int
 _http_upload_response_id_handler(xmpp_stanza_t* const stanza, void* const userdata)
 {