JsonService.cpp File Reference

Implementation of JsonService for loading, saving, and manipulating persistent JSON data. More...

#include "framework_config.h"
#include "DebugTrace.h"
#include "storage/JsonService.h"
#include <cstdio>
#include <cstdint>
#include <vector>

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Functions
nlohmann::json	mergeDefaults (const nlohmann::json &target, const nlohmann::json &defaults)

Detailed Description

Author

Ian Archbell

Part of the PicoFramework application framework. Uses a StorageManager to load and store JSON documents on persistent storage. Supports fallback merge with default data and aliases for ease of use.

Version

0.1

Date

2025-03-31

License:\n MIT License

Copyright

Copyright (c) 2025, Ian Archbell

Definition in file JsonService.cpp.

Function Documentation

mergeDefaults()

nlohmann::json mergeDefaults	(	const nlohmann::json &	target,
		const nlohmann::json &	defaults
	)

Merge a default JSON structure into a target, preserving existing keys.

Merge a default JSON structure into a target, preserving existing keys.

Definition at line 26 of file JsonService.cpp.

{
    nlohmann::json result = target;
 
    for (auto it = defaults.begin(); it != defaults.end(); ++it)
    {
        const std::string &key = it.key();
 
        if (!result.contains(key))
        {
            result[key] = it.value();
        }
        else if (result[key].is_object() && it.value().is_object())
        {
            result[key] = mergeDefaults(result[key], it.value());
        }
    }
 
    return result;
}

References mergeDefaults().

Referenced by mergeDefaults().

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