mirror of
https://github.com/aaronpo97/the-biergarten-app.git
synced 2026-05-31 17:53:59 +00:00
Aaron Po
6a66619c70
* Update class diagrams * Implement BoundedChannel and multithreaded logging infra * Integrate logging channel system * Update string concatenations to use std::format * Add pretty print log
110 lines
2.9 KiB
C++
110 lines
2.9 KiB
C++
#ifndef BIERGARTEN_PIPELINE_INCLUDES_JSON_HANDLING_PRETTY_PRINT_H_
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#define BIERGARTEN_PIPELINE_INCLUDES_JSON_HANDLING_PRETTY_PRINT_H_
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/**
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* @file json_handling/pretty_print.h
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* @brief Pretty-printing utilities for JSON values.
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*
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* Provides formatting capability for boost::json::value with indentation and
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* readable output. Adapted from Boost JSON library examples.
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*/
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#include <boost/json.hpp>
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#include <ostream>
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#include <string>
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/**
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* @brief Pretty-prints a JSON value to an output stream with indentation.
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*
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* Recursively formats JSON objects and arrays with consistent 4-space
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* indentation. Adapted from:
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* https://raw.githubusercontent.com/boostorg/json/refs/heads/develop/example/pretty.cpp
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*
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* @param outstream Output stream to write formatted JSON.
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* @param json_val JSON value to format.
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* @param indent Optional indentation string (managed internally on first call).
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*/
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inline void PrettyPrint(std::ostream& outstream,
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boost::json::value const& json_val,
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std::string* indent = nullptr) {
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std::string str;
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if (indent == nullptr) {
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indent = &str;
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}
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switch (json_val.kind()) {
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case boost::json::kind::object: {
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outstream << "{\n";
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indent->append(4, ' ');
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auto const& obj = json_val.get_object();
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if (!obj.empty()) {
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const auto* iter = obj.begin();
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for (;;) {
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outstream << *indent << boost::json::serialize(iter->key()) << " : ";
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PrettyPrint(outstream, iter->value(), indent);
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iter = std::next(iter);
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if (iter == obj.end()) {
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break;
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}
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outstream << ",\n";
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}
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}
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outstream << "\n";
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indent->resize(indent->size() - 4);
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outstream << *indent << "}";
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break;
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}
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case boost::json::kind::array: {
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outstream << "[\n";
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indent->append(4, ' ');
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auto const& arr = json_val.get_array();
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if (!arr.empty()) {
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const auto* iter = arr.begin();
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for (;;) {
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outstream << *indent;
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PrettyPrint(outstream, *iter, indent);
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iter = std::next(iter);
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if (iter == arr.end()) {
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break;
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}
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outstream << ",\n";
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}
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}
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outstream << "\n";
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indent->resize(indent->size() - 4);
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outstream << *indent << "]";
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break;
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}
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case boost::json::kind::string: {
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outstream << serialize(json_val.get_string());
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break;
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}
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case boost::json::kind::uint64:
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case boost::json::kind::int64:
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case boost::json::kind::double_:
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outstream << json_val;
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break;
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case boost::json::kind::bool_:
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if (json_val.get_bool()) {
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outstream << "true";
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} else {
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outstream << "false";
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}
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break;
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case boost::json::kind::null:
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outstream << "null";
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break;
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}
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if (indent->empty()) {
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outstream << "\n";
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}
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}
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#endif
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