#pragma once

// For:			check and load scanner configuration json
//
// Date:		2022-08-12
//
// FileName:	0239.hsc
//
// Location:	same parent path of scanner component, rel: ./settings
//
// Format:		0: short - 1.2, version of the file format
//
//				2: int - total length of the whole file, include this head
//
//				6: unsigned - checksum of content
//
//				10: BASE64 of the json content

#include <string>

#pragma pack(push)
#pragma pack(1)

typedef struct _scanner_setting_file_head
{
	unsigned char	ver_main;
	unsigned char	ver_sub;
	unsigned int	length;		// whole file length, include this head
	unsigned int	checksum;	// checksum of BASE64 content
    unsigned int    timestamp;  // time(NULL)
	char			base64_content[0];
}SSFILEH, *LPSSFILEH;

#pragma pack(pop)

class base64
{
    char	base64_ind_[128];
    char	base64_char_[80];
    char    padding_char_;

    bool is_valid_base64_table(const char* table);
    bool initialize_base64_table(const char* table);

public:
    base64();
    ~base64();

public:
    bool set_base64_table(const char* table = nullptr);
    std::string encode(const char* data, size_t bytes, unsigned int line_bytes = -1, bool need_padding = true);
    std::string decode(const char* data, size_t bytes);
};

// return 0 for success, otherwise error code
int load_scanner_setting(const char* file, std::string& jsn);
int save_scanner_setting(const char* file, const std::string& jsn);