publishDigitized.cc

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// gstreamer
#include "gstreamerJSONFactory.h"
#include "gstreamerConventions.h"
 
// c++
#include <sstream>
 
// Implementation summary:
// Append digitized detector content to the current JSON event object.
// This implementation keeps the JSON valid without performing in-place string editing.
 
bool GstreamerJsonFactory::publishEventDigitizedDataImpl(const std::string&                        detectorName,
                                                         const std::vector<const GDigitizedData*>& digitizedData) {
    if (!is_building_event) {
        log->error(
            gstreamer::ERR_PUBLISH_ERROR,
            "publishEventDigitizedDataImpl called without an active event in GstreamerJsonFactory");
        return false;
    }
 
    // Build this detector's digitized array into a standalone entry and buffer it.
    // endEventImpl emits all buffered entries together as the "digitized_by_detector"
    // object, which keeps the JSON valid regardless of how true-info and digitized
    // publish calls interleave across detectors.
    if (digitizedData.empty()) return true;
 
    std::ostringstream entry;
    entry << "\"" << jsonEscape(detectorName) << "\": [";
 
    bool wrote_first_hit = false;
    for (const auto* hit : digitizedData) {
        if (!hit) continue;
 
        if (wrote_first_hit) entry << ", ";
        wrote_first_hit = true;
 
        entry << "{";
 
        auto addr = getIdentityString(hit->getIdentity());
 
        entry << "\"address\": \"" << jsonEscape(addr) << "\"";
 
        entry << ", \"vars\": {";
 
        bool wrote_first_var = false;
 
        // Integer observables:
        // the argument 0 means "do not include SRO variables".
        for (const auto& [name, value] : hit->getIntObservablesMap(0)) {
            if (wrote_first_var) entry << ", ";
            wrote_first_var = true;
            entry << "\"" << jsonEscape(name) << "\": " << value;
        }
 
        // Floating-point observables.
        for (const auto& [name, value] : hit->getDblObservablesMap(0)) {
            if (wrote_first_var) entry << ", ";
            wrote_first_var = true;
            entry << "\"" << jsonEscape(name) << "\": " << value;
        }
 
        entry << "}";
        entry << "}";
    }
 
    entry << "]";
 
    current_event_digitized_entries.push_back(entry.str());
 
    return true;
}