OutputConfigurationParser - Introduce main Parser class

Author: Zainullin Damir

include/ipfixprobe/outputPlugin/outputFieldConfigurationParser.hpp

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+/**
+ * @file
+ * @brief Declaration of OutputFieldConfigurationParser.
+ * @author Damir Zainullin <[email protected]>
+ *
+ * @copyright Copyright (c) 2025 CESNET, z.s.p.o.
+ */
+
+#pragma once
+
+#include "../processPlugin/fieldDescriptor.hpp"
+
+#include <vector>
+
+namespace ipxp {
+
+class OutputFieldParser {
+public:
+	static std::vector<const process::FieldDescriptor*> getOutputFields(
+		const std::vector<process::FieldDescriptor>& availableFields,
+		std::string_view configurationFilePath);
+};
+
+}; // namespace ipxp

src/core/outputFieldConfigurationParser/outputFieldConfigurationParser.cpp

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+/**
+ * @file
+ * @brief Implementation of OutputFieldConfigurationParser.
+ * @author Damir Zainullin <[email protected]>
+ *
+ * @copyright Copyright (c) 2025 CESNET, z.s.p.o.
+ */
+
+#include "fieldMap.hpp"
+#include "outputAction.hpp"
+
+#include <fstream>
+#include <regex>
+
+#include <outputFieldConfigurationParser.hpp>
+
+namespace ipxp {
+
+std::vector<const process::FieldDescriptor*> OutputFieldParser::getOutputFields(
+	const std::vector<process::FieldDescriptor>& availableFields,
+	std::string_view configurationFilePath)
+{
+	std::ifstream configurationFile(configurationFilePath.data());
+	if (!configurationFile.is_open()) {
+		throw std::invalid_argument(
+			"Could not open configuration file: " + std::string(configurationFilePath));
+	}
+
+	const std::string configurationContent(
+		(std::istreambuf_iterator<char>(configurationFile)),
+		std::istreambuf_iterator<char>());
+
+	return FieldMap(availableFields).applyActions(parseActions(configurationContent));
+}
+
+} // namespace ipxp