feat(history): /history backend command and status-bar indicator

src/command/cmd_ac.c

@@ -1146,6 +1146,7 @@ cmd_ac_init(void)
 
     autocomplete_add(history_ac, "on");
     autocomplete_add(history_ac, "off");
+    autocomplete_add(history_ac, "backend");
     autocomplete_add(history_ac, "switch");
     autocomplete_add(history_ac, "verify");
     autocomplete_add(history_ac, "export");

src/command/cmd_defs.c

@@ -1882,6 +1882,7 @@ static const struct cmd_t command_defs[] = {
               CMD_TAG_CHAT)
       CMD_SYN(
               "/history on|off",
+              "/history backend",
               "/history switch sqlite|flatfile",
               "/history verify [<jid>]",
               "/history export [<jid>]",
@@ -1889,12 +1890,14 @@ static const struct cmd_t command_defs[] = {
       CMD_DESC(
               "Switch chat history on or off, /logging chat will automatically be enabled when this setting is on. "
               "When history is enabled, previous messages are shown in chat windows. "
+              "Use 'backend' to show the active database backend. "
               "Use 'switch' to change the active database backend at runtime without reconnecting. "
               "Use 'verify' to check integrity of stored message history. "
               "Use 'export' to copy messages from SQLite to flat-file format, or 'import' to copy from flat-file to SQLite. "
               "Both export and import merge with existing data (duplicates are skipped).")
       CMD_ARGS(
               { "on|off", "Enable or disable showing chat history." },
+              { "backend", "Show the name of the active database backend." },
               { "switch sqlite|flatfile", "Switch the active database backend at runtime." },
               { "verify [<jid>]", "Verify integrity of message history. Optionally specify a JID to check only one contact." },
               { "export [<jid>]", "Export SQLite history to flat-file format. Optionally specify a JID to export only one contact." },

src/command/cmd_funcs.c

@@ -6785,6 +6785,15 @@ cmd_history(ProfWin* window, const char* const command, gchar** args)
         return TRUE;
     }
 
+    if (g_strcmp0(args[0], "backend") == 0) {
+        if (active_db_backend && active_db_backend->name) {
+            cons_show("Active database backend: %s", active_db_backend->name);
+        } else {
+            cons_show("No database backend is currently active.");
+        }
+        return TRUE;
+    }
+
     if (g_strcmp0(args[0], "switch") == 0) {
         jabber_conn_status_t conn_status = connection_get_status();
         if (conn_status != JABBER_CONNECTED) {

src/ui/statusbar.c

@@ -52,6 +52,7 @@
 
 #include "config/theme.h"
 #include "config/preferences.h"
+#include "database.h"
 #include "ui/ui.h"
 #include "ui/statusbar.h"
 #include "ui/inputwin.h"
@@ -83,6 +84,7 @@ static WINDOW* statusbar_win;
 void _get_range_bounds(int* start, int* end, gboolean is_static);
 static int _status_bar_draw_time(int pos);
 static int _status_bar_draw_maintext(int pos);
+static int _status_bar_draw_dbbackend(int pos);
 static int _status_bar_draw_bracket(gboolean current, int pos, const char* ch);
 static int _status_bar_draw_extended_tabs(int pos, gboolean prefix, int start, int end, gboolean is_static);
 static int _status_bar_draw_tab(StatusBarTab* tab, int pos, int num, gboolean include_brackets);
@@ -313,6 +315,7 @@ status_bar_draw(void)
 
     pos = _status_bar_draw_time(pos);
     pos = _status_bar_draw_maintext(pos);
+    pos = _status_bar_draw_dbbackend(pos);
     if (max_tabs != 0)
         pos = _status_bar_draw_tabs(pos);
 
@@ -603,6 +606,17 @@ _status_bar_draw_maintext(int pos)
     return pos;
 }
 
+static int
+_status_bar_draw_dbbackend(int pos)
+{
+    if (!active_db_backend || !active_db_backend->name)
+        return pos;
+
+    auto_gchar gchar* label = g_strdup_printf(" [%s]", active_db_backend->name);
+    mvwprintw(statusbar_win, 0, pos, "%s", label);
+    return pos + utf8_display_len(label);
+}
+
 static void
 _destroy_tab(StatusBarTab* tab)
 {