Have Plugins be able to update TR Config

CMakeLists.txt

@@ -273,6 +273,7 @@ list(APPEND trunk_recorder_sources
   trunk-recorder/sources/iq_file_source.cc
   trunk-recorder/csv_helper.cc
   trunk-recorder/config.cc
+  trunk-recorder/config_service.cc
   trunk-recorder/setup_systems.cc
   trunk-recorder/monitor_systems.cc
   trunk-recorder/talkgroup.cc

trunk-recorder/config.cc

@@ -117,6 +117,9 @@ bool load_config(string config_file, Config &config, gr::top_block_sptr &tb, std
               << "byte position of error: " << e.byte << std::endl;
   }
 
+  // Store the raw parsed JSON so we can track which keys were explicitly set
+  config.loaded_json = data;
+
   try {
     // const std::string json_filename = "config.json";
 
@@ -246,11 +249,13 @@ bool load_config(string config_file, Config &config, gr::top_block_sptr &tb, std
 
     BOOST_LOG_TRIVIAL(info) << "\n-------------------------------------\nSYSTEMS\n-------------------------------------\n";
 
+    int sys_json_index = 0;
     for (json element : data["systems"]) {
       bool system_enabled = element.value("enabled", true);
       if (system_enabled) {
         // each system should have a unique index value;
         System *system = System::make(sys_count++);
+        system->set_config_index(sys_json_index);
 
         std::stringstream default_script;
         unsigned long sys_id;
@@ -460,9 +465,11 @@ bool load_config(string config_file, Config &config, gr::top_block_sptr &tb, std
         systems.push_back(system);
         BOOST_LOG_TRIVIAL(info);
       }
+      sys_json_index++;
     }
 
     BOOST_LOG_TRIVIAL(info) << "\n\n-------------------------------------\nSOURCES\n-------------------------------------\n";
+    int source_json_index = 0;
     for (json element : data["sources"]) {
 
       bool source_enabled = element.value("enabled", true);
@@ -651,10 +658,12 @@ bool load_config(string config_file, Config &config, gr::top_block_sptr &tb, std
           source->create_debug_recorder(tb, source_count);
         }
 
+        source->set_config_index(source_json_index);
         sources.push_back(source);
         source_count++;
         BOOST_LOG_TRIVIAL(info) << "\n-------------------------------------\n\n";
       }
+      source_json_index++;
     }
 
     BOOST_LOG_TRIVIAL(info) << "\n\n-------------------------------------\nPLUGINS\n-------------------------------------\n";
@@ -679,3 +688,38 @@ bool load_config(string config_file, Config &config, gr::top_block_sptr &tb, std
   BOOST_LOG_TRIVIAL(info) << "\n\n";
   return true;
 }
+
+bool save_config(const Config &config) {
+  if (config.config_file.empty()) {
+    BOOST_LOG_TRIVIAL(error) << "save_config: No config file path set";
+    return false;
+  }
+
+  try {
+    // Create a backup of the current config file with a timestamp
+    if (boost::filesystem::exists(config.config_file)) {
+      auto now = std::chrono::system_clock::now();
+      auto time_t_now = std::chrono::system_clock::to_time_t(now);
+      std::tm tm_now;
+      localtime_r(&time_t_now, &tm_now);
+      char time_buf[32];
+      std::strftime(time_buf, sizeof(time_buf), "%Y%m%d_%H%M%S", &tm_now);
+
+      std::string backup_file = config.config_file + "." + time_buf + ".bak";
+      boost::filesystem::copy_file(config.config_file, backup_file);
+      BOOST_LOG_TRIVIAL(info) << "Configuration backup saved to: " << backup_file;
+    }
+
+    std::ofstream f(config.config_file);
+    if (!f.is_open()) {
+      BOOST_LOG_TRIVIAL(error) << "save_config: Could not open file for writing: " << config.config_file;
+      return false;
+    }
+    f << config.loaded_json.dump(4) << std::endl;
+    BOOST_LOG_TRIVIAL(info) << "Configuration saved to: " << config.config_file;
+    return true;
+  } catch (const std::exception &e) {
+    BOOST_LOG_TRIVIAL(error) << "save_config: Failed to save config: " << e.what();
+    return false;
+  }
+}

trunk-recorder/config.h

@@ -34,5 +34,6 @@
 #include <json.hpp>
 
 bool load_config(std::string config_file, Config &config, gr::top_block_sptr &tb, std::vector<Source *> &sources, std::vector<System *> &systems);
+bool save_config(const Config &config);
 
 #endif