add missing file

src/experiments/slots_parser_example.cpp

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2024 Transit Live Mapping Solutions
+ * All rights reserved.
+ *
+ * Authors:
+ *   Marenz Schmidl
+ */
+
+#include "borzoi/borzoi_packets.hpp"
+#include "nlohmann/borzoi_receive_tetra_slots.hpp" // IWYU pragma: keep
+#include <cstddef>
+#include <cstdlib>
+#include <cxxopts.hpp>
+#include <filesystem>
+#include <iostream>
+#include <nlohmann/json_fwd.hpp>
+#include <rapidcsv.h>
+#include <string>
+
+auto main(int argc, char** argv) -> int {
+    std::string datafile;
+
+    cxxopts::Options options("slots-parser-example", "Reads a csv file and extracts the contained slots.");
+
+    // clang-format off
+	options.add_options()
+		("h,help", "Print usage")
+		("datafile", "the path to the file containing historic slots data", cxxopts::value<std::string>(datafile)->default_value("datafile.csv"))
+		;
+    // clang-format on
+
+    try {
+        auto result = options.parse(argc, argv);
+
+        if (result.count("help")) {
+            std::cout << options.help() << std::endl;
+            return EXIT_SUCCESS;
+        }
+    } catch (std::exception& e) {
+        std::cout << "error parsing options: " << e.what() << std::endl;
+        return EXIT_FAILURE;
+    }
+
+    if (!std::filesystem::exists(datafile)) {
+        std::cout << "Datafile does not exists." << std::endl;
+        return EXIT_FAILURE;
+    }
+
+    /// The variable datafile contains the path to the csv file.
+    std::cout << "Parsing datafile: " << datafile << std::endl;
+
+    rapidcsv::Document doc(datafile);
+
+    std::cout << "Read " << doc.GetRowCount() << " rows." << std::endl;
+
+    auto column_names = doc.GetColumnNames();
+
+    for (std::size_t i = 0; i < doc.GetRowCount(); i++) {
+        auto row = doc.GetRow<std::string>(i);
+        auto json = nlohmann::json::object();
+
+        for (std::size_t i = 0; i < row.size(); i++) {
+            auto value = row.at(i);
+            auto column = column_names.at(i);
+            if (column == "first_slot_data" || (column == "second_slot_data" && !value.empty())) {
+                json[column] = nlohmann::json::parse(value);
+            } else {
+                json[column] = value;
+            }
+        }
+
+        std::cout << json << std::endl;
+        BorzoiReceiveTetraSlots packet = json;
+        std::cout << packet << std::endl;
+    }
+
+    return EXIT_SUCCESS;
+}