Added support for hostname based module addition

include/util/hosts_check.hpp

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <json/value.h>
+#include <string>
+
+namespace waybar::util {
+bool valid_host(const Json::Value& config);
+}  // namespace waybar::util

meson.build

@@ -181,6 +181,7 @@ src_files = files(
     'src/util/prepare_for_sleep.cpp',
     'src/util/ustring_clen.cpp',
     'src/util/sanitize_str.cpp',
+    'src/util/hosts_check.cpp',
     'src/util/rewrite_string.cpp',
     'src/util/gtk_icon.cpp',
     'src/util/icon_loader.cpp',

src/bar.cpp

@@ -10,6 +10,7 @@
 #include "group.hpp"
 #include "util/enum.hpp"
 #include "util/kill_signal.hpp"
+#include "util/hosts_check.hpp"
 
 #ifdef HAVE_SWAY
 #include "modules/sway/bar.hpp"
@@ -531,6 +532,19 @@ void waybar::Bar::getModules(const Factory& factory, const std::string& pos,
     for (const auto& name : module_list) {
       try {
         auto ref = name.asString();
+        const Json::Value* module_config = nullptr;
+        if (config.isMember(ref)) {
+          module_config = &config[ref];
+        } else {
+          auto hash_pos = ref.find('#');
+          if (hash_pos != std::string::npos) {
+            std::string ref_base = ref.substr(0, hash_pos);
+            if (config.isMember(ref_base)) {
+              module_config = &config[ref_base];
+            }
+          }
+        }
+        if (module_config && !waybar::util::valid_host(*module_config)) continue;
         AModule* module;
 
         if (ref.compare(0, 6, "group/") == 0 && ref.size() > 6) {

src/util/hosts_check.cpp

@@ -0,0 +1,19 @@
+#include <glibmm/miscutils.h>
+
+#include "util/hosts_check.hpp"
+
+namespace waybar::util {
+// replaces ``<>&"'`` with their encoded counterparts
+bool valid_host(const Json::Value& config) {
+  if (config.isMember("hosts") && config["hosts"].isArray()) {
+    auto hostname = Glib::get_host_name();
+    for (const auto& host : config["hosts"]) {
+      if (host.asString() == hostname) {
+        return true;
+      }
+    }
+    return false;
+  }
+  return true;
+}
+}  // namespace waybar::util