Integrate digi event building into cbmreco

Event building (comprising digi trigger, digi event building and event selection) is added to cbmreco. For this, a Subchain Eventbuild was introduced. It covers the functionality of CbmTaskTriggerDigi and CbmTaskBuildEvents in the cbmreco_fairrun task-based framework.

Configuration is through the same YAML file that is also used in cbmreco_fairrun (class MainConfig). This is for the time being side-by-side with RecoParams. We have to integrate that more coherently in the future.

Monitoring data are not yet picked up from the Reco class.

algo/base/MainConfig.cxx

+/* Copyright (C) 2023 GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
+   SPDX-License-Identifier: GPL-3.0-only
+   Authors: Volker Friese [committer] */
+
+#include "MainConfig.h"
+
+#include <fstream>
+
+#include <yaml-cpp/yaml.h>
+
+namespace cbm::algo
+{
+
+  // -----   Load configuration from YAML file   --------------------------------
+  void MainConfig::LoadYaml(const std::string& filename)
+  {
+    YAML::Node config = YAML::LoadFile(filename);
+
+    // --- Digi trigger
+    fTriggerDet       = ToCbmModuleIdCaseInsensitive(config["trigger"]["detector"].as<std::string>());
+    fTriggerWin       = config["trigger"]["window"].as<double>();
+    fTriggerThreshold = config["trigger"]["threshold"].as<size_t>();
+    fTriggerDeadTime  = config["trigger"]["deadtime"].as<double>();
+
+    // --- Event builder: (detector -> (tMin, tMax))
+    if (auto eventbuilder = config["eventbuilder"]) {
+      if (auto windows = eventbuilder["windows"]) {
+        for (YAML::const_iterator it = windows.begin(); it != windows.end(); ++it) {
+          auto det              = ToCbmModuleIdCaseInsensitive(it->first.as<std::string>());
+          auto lower            = it->second[0].as<double>();
+          auto upper            = it->second[1].as<double>();
+          fEvtbuildWindows[det] = std::make_pair(lower, upper);
+        }
+      }
+    }
+
+    // --- Event selector parameters
+    fSelectMinStationsSts = config["selector"]["minStationsSts"].as<size_t>();
+    fSelectMinStationsTof = config["selector"]["minStationsTof"].as<size_t>();
+    fSelectMinDigisBmon   = config["selector"]["minDigisBmon"].as<size_t>();
+
+    // --- Branch persistence in output file
+    fStoreTimeslice = config["store"]["timeslice"].as<bool>();
+    fStoreTrigger   = config["store"]["triggers"].as<bool>();
+    fStoreEvents    = config["store"]["events"].as<bool>();
+
+    // --- QA publishing
+    fHttpServerRefreshRate = config["qa"]["refreshrate"].as<int32_t>(fHttpServerRefreshRate);
+  }
+  // ----------------------------------------------------------------------------
+
+
+  // -----   Save configuration to YAML file   ----------------------------------
+  void MainConfig::SaveYaml(const std::string& filename)
+  {
+    YAML::Node config;
+
+    // --- Digi trigger
+    config["trigger"]["detector"]  = ToString(fTriggerDet);
+    config["trigger"]["window"]    = fTriggerWin;
+    config["trigger"]["threshold"] = fTriggerThreshold;
+    config["trigger"]["deadtime"]  = fTriggerDeadTime;
+
+    // --- Event builder: (detector -> (tMin, tMax))
+    for (const auto& [key, value] : fEvtbuildWindows) {
+      auto det = ToString(key);
+      config["eventbuilder"]["windows"][det].push_back(value.first);
+      config["eventbuilder"]["windows"][det].push_back(value.second);
+    };
+
+    // --- Event selector
+    config["selector"]["minStationsSts"] = fSelectMinStationsSts;
+    config["selector"]["minStationsTof"] = fSelectMinStationsTof;
+    config["selector"]["minDigisBmon"]   = fSelectMinDigisBmon;
+
+
+    // --- Branch persistence in output file
+    config["store"]["timeslice"] = fStoreTimeslice;
+    config["store"]["triggers"]  = fStoreTrigger;
+    config["store"]["events"]    = fStoreEvents;
+    // --- QA publishing
+    config["qa"]["refreshrate"] = fHttpServerRefreshRate;
+    // ---
+    std::ofstream fout(filename);
+    fout << config;
+  }
+  // ----------------------------------------------------------------------------
+
+} /* namespace cbm::algo */