AI-on-the-edge-device/code/components/jomjol_helper/Helper.cpp

#include "defines.h"

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

#include "Helper.h"
#include <sys/types.h>
#include <sys/stat.h>

#include <iomanip>
#include <sstream>
#include <fstream>
#include <iostream>
#include <math.h>
#include <dirent.h>
#include <string.h>
#include <esp_log.h>
#include <esp_mac.h>
#include <esp_timer.h>

#include "ClassLogFile.h"

#include <esp_vfs_fat.h>

#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 0))
#include <esp_private/sdmmc_common.h>
#else
#include <../sdmmc_common.h>
#endif

static const char *TAG = "HELPER";

using namespace std;

unsigned int systemStatus = 0;
bool all_pw_were_encrypted = false;

sdmmc_cid_t sd_card_cid;
sdmmc_csd_t sd_card_csd;
bool is_sd_card_mmc;

#if CONFIG_SOC_TEMP_SENSOR_SUPPORTED
// The ESP32-S2/C3/S3/C2 has a built-in temperature sensor.
// The temperature sensor module contains an 8-bit Sigma-Delta ADC and a temperature offset DAC.
// https://github.com/espressif/esp-idf/blob/master/examples/peripherals/temperature_sensor/
temperature_sensor_handle_t temp_handle = NULL;
temperature_sensor_config_t temp_sensor = {
	.range_min = -10,
	.range_max = 80,
	.clk_src = TEMPERATURE_SENSOR_CLK_SRC_DEFAULT,
};

void init_tempsensor(void)
{
	ESP_ERROR_CHECK(temperature_sensor_install(&temp_sensor, &temp_handle));

	xTaskCreate(
		[](void *pvParameters)
		{
			while (1)
			{
				// Get converted sensor data
				float tsens_out;

				// Enable temperature sensor
				ESP_ERROR_CHECK(temperature_sensor_enable(temp_handle));
				ESP_ERROR_CHECK(temperature_sensor_get_celsius(temp_handle, &tsens_out));
				temp_sens_value = tsens_out;
				// Disable the temperature sensor if it is not needed and save the power
				ESP_ERROR_CHECK(temperature_sensor_disable(temp_handle));

				vTaskDelay(pdMS_TO_TICKS(5000));
			}
		},
		"tempsensor_task", 2048, NULL, 5, NULL);
}

float read_tempsensor(void)
{
	return temp_sens_value;
}
#elif CONFIG_IDF_TARGET_ESP32
extern "C" uint8_t temprature_sens_read(void);
float read_tempsensor(void)
{
	// convert Fahrenheit to Celsius (F-32) * (5/9) = degree Celsius
	temp_sens_value = (temprature_sens_read() - 32) / 1.8;
	return temp_sens_value;
}
#endif

void string_to_ip4(const char *ip, int &a, int &b, int &c, int &d)
{
	std::string zw = std::string(ip);
	std::stringstream s(zw);
	char ch; // to temporarily store the '.'
	s >> a >> ch >> b >> ch >> c >> ch >> d;
}

std::string bssid_to_string(const char *c)
{
	char cBssid[25];
	sprintf(cBssid, "%02x:%02x:%02x:%02x:%02x:%02x", c[0], c[1], c[2], c[3], c[4], c[5]);
	return std::string(cBssid);
}

string to_upper(string in)
{
	for (int i = 0; i < in.length(); ++i)
	{
		in[i] = toupper(in[i]);
	}

	return in;
}

string to_lower(string in)
{
	for (int i = 0; i < in.length(); ++i)
	{
		in[i] = tolower(in[i]);
	}

	return in;
}

std::vector<std::string> split_string(const std::string &str)
{
	std::vector<std::string> tokens;

	std::stringstream ss(str);
	std::string token;

	while (std::getline(ss, token, '\n'))
	{
		tokens.push_back(token);
	}

	return tokens;
}

std::vector<std::string> split_line(std::string input, std::string _delimiter)
{
	std::vector<std::string> Output;

	// wenn input nicht leer ist
	if (input.length() > 1)
	{
		if ((to_upper(input).find("PASSWORD") != std::string::npos) || (input.find("SSID") != std::string::npos) || (to_upper(input).find("TOKEN") != std::string::npos) || (to_upper(input).find("APIKEY") != std::string::npos) ||
			(input.find("**##**") != std::string::npos))
		{
			size_t pos1 = input.find(_delimiter);
			size_t pos2 = input.find(" ");

			// wenn _delimiter im string gefunden wird
			if (pos1 != std::string::npos)
			{
				Output.push_back(trim_string_left_right(input.substr(0, pos1), ""));

				// wenn der string einen Wert enthält
				if ((input.size() - 1) > pos1)
				{
					// überprüfe die erste Stelle
					std::string value = input.substr(pos1, std::string::npos);
					value.erase(0, 1);
					value = trim_string_left_right(value, "");

					if ((value.substr(0, 1) == "\"") && (value.substr(value.size() - 1, std::string::npos) == "\""))
					{
						value = value.substr(1, value.size() - 2);
					}

					std::string is_pw_encrypted = value.substr(0, 6);

					if (is_pw_encrypted == "**##**")
					{
						Output.push_back(encrypt_decrypt_string(value.substr(6, std::string::npos)));
					}
					else
					{
						Output.push_back(value.substr(0, std::string::npos));
					}
				}
				else
				{
					Output.push_back("");
				}
			}
			// wenn Leerzeichen im string gefunden wird
			else if (pos2 != std::string::npos)
			{
				Output.push_back(trim_string_left_right(input.substr(0, pos2), ""));

				// wenn der string einen Wert enthält
				if ((input.size() - 1) > pos2)
				{
					// überprüfe die erste Stelle
					std::string value = input.substr(pos2, std::string::npos);
					value.erase(0, 1);
					value = trim_string_left_right(value, "");

					if ((value.substr(0, 1) == "\"") && (value.substr(value.size() - 1, std::string::npos) == "\""))
					{
						value = value.substr(1, value.size() - 2);
					}

					std::string is_pw_encrypted = value.substr(0, 6);

					if (is_pw_encrypted == "**##**")
					{
						Output.push_back(encrypt_decrypt_string(value.substr(6, std::string::npos)));
					}
					else
					{
						Output.push_back(value.substr(0, std::string::npos));
					}
				}
				else
				{
					Output.push_back("");
				}
			}
			else
			{
				Output.push_back(input);
			}
		}
		else
		{
			// Legacy Mode
			std::string token;
			size_t pos1 = std::string::npos;

			if (find_delimiter_pos(input, _delimiter) != std::string::npos)
			{
				pos1 = find_delimiter_pos(input, _delimiter);
			}
			else
			{
				pos1 = find_delimiter_pos(input, " ");
			}

			if (pos1 != std::string::npos)
			{
				Output.push_back(trim_string_left_right(input.substr(0, pos1), " "));

				if ((input.size() - 1) > pos1)
				{
					// überprüfe die erste Stelle
					std::string value = input.substr(pos1, std::string::npos);
					value.erase(0, 1);
					value = trim_string_left_right(value, " ");

					if (find_delimiter_pos(value, _delimiter) != std::string::npos)
					{
						pos1 = find_delimiter_pos(value, _delimiter);
					}
					else
					{
						pos1 = find_delimiter_pos(value, " ");
					}

					if ((value.substr(0, 1) == "\"") && (value.substr(value.size() - 1, std::string::npos) == "\""))
					{
						value = value.substr(1, value.size() - 2);
					}

					while (pos1 != std::string::npos)
					{
						token = value.substr(0, pos1);
						token = trim_string_left_right(token, " ");
						if ((token.substr(0, 1) == "\"") && (token.substr(token.size() - 1, std::string::npos) == "\""))
						{
							token = token.substr(1, token.size() - 2);
						}
						Output.push_back(token);

						value.erase(0, pos1 + 1);
						value = trim_string_left_right(value, " ");

						if (find_delimiter_pos(value, _delimiter) != std::string::npos)
						{
							pos1 = find_delimiter_pos(value, _delimiter);
						}
						else
						{
							pos1 = find_delimiter_pos(value, " ");
						}
					}

					if ((value.substr(0, 1) == "\"") && (value.substr(value.size() - 1, std::string::npos) == "\""))
					{
						value = value.substr(1, value.size() - 2);
					}
					Output.push_back(value);
				}
				else
				{
					Output.push_back("");
				}
			}
			else
			{
				Output.push_back(input);
			}
		}
	}
	else
	{
		Output.push_back(input);
	}

	return Output;
}

// Encrypt/Decrypt a string
std::string encrypt_decrypt_string(std::string toEncrypt)
{
	char key[3] = {'K', 'C', 'Q'}; // Any chars will work, in an array of any size
	std::string output = toEncrypt;

	for (int i = 0; i < toEncrypt.size(); i++)
	{
		output[i] = toEncrypt[i] ^ key[i % (sizeof(key) / sizeof(char))];
	}

	return output;
}

// Checks whether a password is decrypted
std::string encrypt_pw_string(std::string toEncrypt)
{
	std::string string_result = "";

	if (is_in_string(toEncrypt, (std::string)STRING_ENCRYPTED_LABEL))
	{
		string_result = toEncrypt;
		all_pw_were_encrypted = true;
	}
	else
	{
		string_result = (std::string)STRING_ENCRYPTED_LABEL + encrypt_decrypt_string(toEncrypt);
		all_pw_were_encrypted = false;
	}

	return string_result;
}

std::string decrypt_pw_string(std::string toDecrypt)
{
	std::string string_result = "";

	if (is_in_string(toDecrypt, (std::string)STRING_ENCRYPTED_LABEL))
	{
		replace_string(toDecrypt, (std::string)STRING_ENCRYPTED_LABEL, "", false);
		string_result = encrypt_decrypt_string(toDecrypt);
		all_pw_were_encrypted = true;
	}
	else
	{
		string_result = toDecrypt;
		all_pw_were_encrypted = false;
	}

	return string_result;
}

// Checks if all passwords on the SD are encrypted and if they are not encrypted, it encrypts them.
esp_err_t encrypt_decrypt_pw_on_sd(bool _encrypt, std::string filename)
{
	std::string _filename = format_filename(filename);
	FILE *pFile = fopen(_filename.c_str(), "r");

	if (pFile == NULL)
	{
		LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "EncryptDecryptConfigPwOnSD: Unable to open file config.ini (read)");
		fclose(pFile);
		return ESP_FAIL;
	}

	ESP_LOGD(TAG, "EncryptDecryptConfigPwOnSD: config.ini opened");

	std::string line = "";
	char temp_line[256];

	if (fgets(temp_line, sizeof(temp_line), pFile) == NULL)
	{
		line = "";
		LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "EncryptDecryptConfigPwOnSD: File opened, but empty or content not readable");
		fclose(pFile);
		return ESP_FAIL;
	}
	else
	{
		line = std::string(temp_line);
	}

	all_pw_were_encrypted = false;

	std::vector<std::string> splitted;
	std::vector<std::string> temp_file;

	if (_encrypt)
	{
		while ((line.size() > 0) || !(feof(pFile)))
		{
			splitted = split_line(line);
			std::string _param = to_upper(splitted[0]);

			if (splitted.size() > 1)
			{
				if (filename == CONFIG_FILE)
				{
					if (_param == "PASSWORD")
					{
						line = "password = " + encrypt_pw_string(splitted[1]) + "\n";
					}
					else if (_param == "TOKEN")
					{
						line = "Token = " + encrypt_pw_string(splitted[1]) + "\n";
					}
					else if (_param == "APIKEY")
					{
						line = "apikey = " + encrypt_pw_string(splitted[1]) + "\n";
					}
				}
				else if ((filename == WLAN_CONFIG_FILE) || (filename == NETWORK_CONFIG_FILE))
				{
					if (_param == "PASSWORD")
					{
						line = "password = \"" + encrypt_pw_string(splitted[1]) + "\"\n";
					}
					else if (_param == "HTTP_PASSWORD")
					{
						line = "http_password = \"" + encrypt_pw_string(splitted[1]) + "\"\n";
					}
				}
			}

			temp_file.push_back(line);

			if (fgets(temp_line, sizeof(temp_line), pFile) == NULL)
			{
				line = "";
			}
			else
			{
				line = std::string(temp_line);
			}
		}
	}
	else
	{
		while ((line.size() > 0) || !(feof(pFile)))
		{
			splitted = split_line(line);
			std::string _param = to_upper(splitted[0]);

			if (splitted.size() > 1)
			{
				if (filename == CONFIG_FILE)
				{
					if (_param == "PASSWORD")
					{
						line = "password = " + decrypt_pw_string(splitted[1]) + "\n";
					}
					else if (_param == "TOKEN")
					{
						line = "Token = " + decrypt_pw_string(splitted[1]) + "\n";
					}
					else if (_param == "APIKEY")
					{
						line = "apikey = " + decrypt_pw_string(splitted[1]) + "\n";
					}
				}
				else if ((filename == WLAN_CONFIG_FILE) || (filename == NETWORK_CONFIG_FILE))
				{
					if (_param == "PASSWORD")
					{
						line = "password = \"" + decrypt_pw_string(splitted[1]) + "\"\n";
					}
					else if (_param == "HTTP_PASSWORD")
					{
						line = "http_password = \"" + decrypt_pw_string(splitted[1]) + "\"\n";
					}
				}
			}

			temp_file.push_back(line);

			if (fgets(temp_line, sizeof(temp_line), pFile) == NULL)
			{
				line = "";
			}
			else
			{
				line = std::string(temp_line);
			}
		}
	}

	fclose(pFile);

	// Only write to the SD if not all passwords are encrypted
	if ((all_pw_were_encrypted == false && _encrypt == true) || (all_pw_were_encrypted == true && _encrypt == false))
	{
		pFile = fopen(_filename.c_str(), "w+");

		if (pFile == NULL)
		{
			LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "EncryptDecryptConfigPwOnSD: Unable to open file config.ini (write)");
			fclose(pFile);
			return ESP_FAIL;
		}

		for (int i = 0; i < temp_file.size(); ++i)
		{
			fputs(temp_file[i].c_str(), pFile);
		}

		fclose(pFile);
	}

	ESP_LOGD(TAG, "EncryptDecryptConfigPwOnSD done");

	return ESP_OK;
}

string get_heapinfo()
{
	string espInfoResultStr = "";
	char aMsgBuf[80];

	size_t aFreeHeapSize = heap_caps_get_free_size(MALLOC_CAP_8BIT);

	size_t aFreeSPIHeapSize = heap_caps_get_free_size(MALLOC_CAP_8BIT | MALLOC_CAP_SPIRAM);
	size_t aFreeInternalHeapSize = heap_caps_get_free_size(MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL);

	size_t aHeapLargestFreeBlockSize = heap_caps_get_largest_free_block(MALLOC_CAP_8BIT | MALLOC_CAP_SPIRAM);
	size_t aHeapIntLargestFreeBlockSize = heap_caps_get_largest_free_block(MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL);

	size_t aMinFreeHeapSize = heap_caps_get_minimum_free_size(MALLOC_CAP_8BIT | MALLOC_CAP_SPIRAM);
	size_t aMinFreeInternalHeapSize = heap_caps_get_minimum_free_size(MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL);

	sprintf(aMsgBuf, "Heap Total: %ld", (long)aFreeHeapSize);
	espInfoResultStr += string(aMsgBuf);

	sprintf(aMsgBuf, " | SPI Free: %ld", (long)aFreeSPIHeapSize);
	espInfoResultStr += string(aMsgBuf);
	sprintf(aMsgBuf, " | SPI Large Block:  %ld", (long)aHeapLargestFreeBlockSize);
	espInfoResultStr += string(aMsgBuf);
	sprintf(aMsgBuf, " | SPI Min Free: %ld", (long)aMinFreeHeapSize);
	espInfoResultStr += string(aMsgBuf);

	sprintf(aMsgBuf, " | Int Free: %ld", (long)(aFreeInternalHeapSize));
	espInfoResultStr += string(aMsgBuf);
	sprintf(aMsgBuf, " | Int Large Block:  %ld", (long)aHeapIntLargestFreeBlockSize);
	espInfoResultStr += string(aMsgBuf);
	sprintf(aMsgBuf, " | Int Min Free: %ld", (long)(aMinFreeInternalHeapSize));
	espInfoResultStr += string(aMsgBuf);

	return espInfoResultStr;
}

size_t get_heapsize()
{
	return heap_caps_get_free_size(MALLOC_CAP_8BIT);
}

size_t get_internal_heapsize()
{
	return heap_caps_get_free_size(MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL);
}

///////////////////////////////////////////////////////////////////////////////////////////////

/* Source: https://git.kernel.org/pub/scm/utils/mmc/mmc-utils.git/tree/lsmmc.c */
/* SD Card Manufacturer Database */
struct SDCard_Manufacturer_database
{
	string type;
	int id;
	string manufacturer;
};

/* Source: https://git.kernel.org/pub/scm/utils/mmc/mmc-utils.git/tree/lsmmc.c */
/* SD Card Manufacturer Database */
struct SDCard_Manufacturer_database sd_database[] = {
	{
		.type = "sd",
		.id = 0x01,
		.manufacturer = "Panasonic",
	},
	{
		.type = "sd",
		.id = 0x02,
		.manufacturer = "Toshiba/Kingston/Viking",
	},
	{
		.type = "sd",
		.id = 0x03,
		.manufacturer = "SanDisk",
	},
	{
		.type = "sd",
		.id = 0x05,
		.manufacturer = "Lenovo",
	},
	{
		.type = "sd",
		.id = 0x08,
		.manufacturer = "Silicon Power",
	},
	{
		.type = "sd",
		.id = 0x09,
		.manufacturer = "ATP",
	},
	{
		.type = "sd",
		.id = 0x18,
		.manufacturer = "Infineon",
	},
	{
		.type = "sd",
		.id = 0x1b,
		.manufacturer = "Transcend/Samsung",
	},
	{
		.type = "sd",
		.id = 0x1c,
		.manufacturer = "Transcend",
	},
	{
		.type = "sd",
		.id = 0x1d,
		.manufacturer = "Corsair/AData",
	},
	{
		.type = "sd",
		.id = 0x1e,
		.manufacturer = "Transcend",
	},
	{
		.type = "sd",
		.id = 0x1f,
		.manufacturer = "Kingston",
	},
	{
		.type = "sd",
		.id = 0x27,
		.manufacturer = "Delkin/Phison",
	},
	{
		.type = "sd",
		.id = 0x28,
		.manufacturer = "Lexar",
	},
	{
		.type = "sd",
		.id = 0x30,
		.manufacturer = "SanDisk",
	},
	{
		.type = "sd",
		.id = 0x31,
		.manufacturer = "Silicon Power",
	},
	{
		.type = "sd",
		.id = 0x33,
		.manufacturer = "STMicroelectronics",
	},
	{
		.type = "sd",
		.id = 0x41,
		.manufacturer = "Kingston",
	},
	{
		.type = "sd",
		.id = 0x6f,
		.manufacturer = "STMicroelectronics",
	},
	{
		.type = "sd",
		.id = 0x74,
		.manufacturer = "Transcend",
	},
	{
		.type = "sd",
		.id = 0x76,
		.manufacturer = "Patriot",
	},
	{
		.type = "sd",
		.id = 0x82,
		.manufacturer = "Gobe/Sony",
	},
	{
		.type = "sd",
		.id = 0x89,
		.manufacturer = "Netac",
	},
	{
		.type = "sd",
		.id = 0x9f,
		.manufacturer = "Kingston/Kodak/Silicon Power",
	},
	{
		.type = "sd",
		.id = 0xad,
		.manufacturer = "Amazon Basics/Lexar/OV",
	},
	{
		.type = "sd",
		.id = 0xdf,
		.manufacturer = "Lenovo",
	},
	{
		.type = "sd",
		.id = 0xfe,
		.manufacturer = "Bekit/Cloudisk/HP/Reletech",
	},
};

struct SDCard_Manufacturer_database mmc_database[] = {
	{
		.type = "mmc",
		.id = 0x00,
		.manufacturer = "SanDisk",
	},
	{
		.type = "mmc",
		.id = 0x02,
		.manufacturer = "Kingston/SanDisk",
	},
	{
		.type = "mmc",
		.id = 0x03,
		.manufacturer = "Toshiba",
	},
	{
		.type = "mmc",
		.id = 0x05,
		.manufacturer = "Unknown",
	},
	{
		.type = "mmc",
		.id = 0x06,
		.manufacturer = "Unknown",
	},
	{
		.type = "mmc",
		.id = 0x11,
		.manufacturer = "Toshiba",
	},
	{
		.type = "mmc",
		.id = 0x13,
		.manufacturer = "Micron",
	},
	{
		.type = "mmc",
		.id = 0x15,
		.manufacturer = "Samsung/SanDisk/LG",
	},
	{
		.type = "mmc",
		.id = 0x37,
		.manufacturer = "KingMax",
	},
	{
		.type = "mmc",
		.id = 0x44,
		.manufacturer = "ATP",
	},
	{
		.type = "mmc",
		.id = 0x45,
		.manufacturer = "SanDisk Corporation",
	},
	{
		.type = "mmc",
		.id = 0x2c,
		.manufacturer = "Kingston",
	},
	{
		.type = "mmc",
		.id = 0x70,
		.manufacturer = "Kingston",
	},
	{
		.type = "mmc",
		.id = 0xfe,
		.manufacturer = "Micron",
	},
};

/* Parse SD Card Manufacturer Database */
string sd_card_parse_manufacturer_ids(int id)
{
	if (is_sd_card_mmc)
	{
		unsigned int id_cnt = sizeof(mmc_database) / sizeof(struct SDCard_Manufacturer_database);
		string ret_val = "";

		for (int i = 0; i < id_cnt; i++)
		{
			if (mmc_database[i].id == id)
			{
				return mmc_database[i].manufacturer;
			}
			else
			{
				ret_val = "ID unknown (not in DB)";
			}
		}

		return ret_val;
	}

	else
	{
		unsigned int id_cnt = sizeof(sd_database) / sizeof(struct SDCard_Manufacturer_database);
		string ret_val = "";

		for (int i = 0; i < id_cnt; i++)
		{
			if (sd_database[i].id == id)
			{
				return sd_database[i].manufacturer;
			}
			else
			{
				ret_val = "ID unknown (not in DB)";
			}
		}

		return ret_val;
	}
}

string get_sd_card_partition_size()
{
	FATFS *fs;
	uint32_t fre_clust, tot_sect;

	/* Get volume information and free clusters of drive 0 */
	f_getfree("0:", (DWORD *)&fre_clust, &fs);
	tot_sect = ((fs->n_fatent - 2) * fs->csize) / 1024 / (1024 / sd_card_csd.sector_size); // corrected by SD Card sector size (usually 512 bytes) and convert to MB

	return std::to_string(tot_sect);
}

string get_sd_card_free_partition_space()
{
	FATFS *fs;
	uint32_t fre_clust, fre_sect;

	/* Get volume information and free clusters of drive 0 */
	f_getfree("0:", (DWORD *)&fre_clust, &fs);
	fre_sect = (fre_clust * fs->csize) / 1024 / (1024 / sd_card_csd.sector_size); // corrected by SD Card sector size (usually 512 bytes) and convert to MB

	return std::to_string(fre_sect);
}

string get_sd_card_partition_allocation_size()
{
	FATFS *fs;
	uint32_t fre_clust, allocation_size;

	/* Get volume information and free clusters of drive 0 */
	f_getfree("0:", (DWORD *)&fre_clust, &fs);
	allocation_size = fs->ssize;

	return std::to_string(allocation_size);
}

void save_sd_card_info(sdmmc_card_t *card)
{
	sd_card_cid = card->cid;
	sd_card_csd = card->csd;
	is_sd_card_mmc = card->is_mmc;
}

string get_sd_card_manufacturer()
{
	string SDCardManufacturer = sd_card_parse_manufacturer_ids(sd_card_cid.mfg_id);
	return (SDCardManufacturer + " (ID: " + std::to_string(sd_card_cid.mfg_id) + ")");
}

string get_sd_card_name()
{
	char *SDCardName = sd_card_cid.name;
	return std::string(SDCardName);
}

string get_sd_card_capacity()
{
	int SDCardCapacity = sd_card_csd.capacity / (1024 / sd_card_csd.sector_size) / 1024; // total sectors * sector size  --> Byte to MB (1024*1024)
	return std::to_string(SDCardCapacity);
}

string get_sd_card_sector_size()
{
	int SDCardSectorSize = sd_card_csd.sector_size;
	return std::to_string(SDCardSectorSize);
}

///////////////////////////////////////////////////////////////////////////////////////////////

void mem_copy_gen(uint8_t *_source, uint8_t *_target, int _size)
{
	for (int i = 0; i < _size; ++i)
	{
		*(_target + i) = *(_source + i);
	}
}

std::string format_filename(std::string input)
{
#ifdef ISWINDOWS_TRUE
	input.erase(0, 1);
	std::string os = "/";
	std::string ns = "\\";
	find_replace(input, os, ns);
#endif
	return input;
}

std::size_t file_size(const std::string &file_name)
{
	std::ifstream file(file_name.c_str(), std::ios::in | std::ios::binary);

	if (!file)
	{
		return 0;
	}

	file.seekg(0, std::ios::end);
	return static_cast<std::size_t>(file.tellg());
}

void find_replace(std::string &line, std::string &oldString, std::string &newString)
{
	const size_t oldSize = oldString.length();

	// do nothing if line is shorter than the string to find
	if (oldSize > line.length())
	{
		return;
	}

	const size_t newSize = newString.length();

	for (size_t pos = 0;; pos += newSize)
	{
		// Locate the substring to replace
		pos = line.find(oldString, pos);

		if (pos == std::string::npos)
		{
			return;
		}

		if (oldSize == newSize)
		{
			// if they're same size, use std::string::replace
			line.replace(pos, oldSize, newString);
		}
		else
		{
			// if not same size, replace by erasing and inserting
			line.erase(pos, oldSize);
			line.insert(pos, newString);
		}
	}
}

/**
 * Create a folder and its parent folders as needed
 */
bool make_dir(std::string path)
{
	std::string parent;

	LogFile.WriteToFile(ESP_LOG_DEBUG, TAG, "Creating folder " + path + "...");

	bool bSuccess = false;
	int nRC = ::mkdir(path.c_str(), 0775);

	if (nRC == -1)
	{
		switch (errno)
		{
		case ENOENT:
			// parent didn't exist, try to create it
			parent = path.substr(0, path.find_last_of('/'));
			LogFile.WriteToFile(ESP_LOG_DEBUG, TAG, "Need to create parent folder first: " + parent);

			if (make_dir(parent))
			{
				// Now, try to create again.
				bSuccess = 0 == ::mkdir(path.c_str(), 0775);
			}
			else
			{
				LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to create parent folder: " + parent);
				bSuccess = false;
			}
			break;

		case EEXIST:
			// Done!
			bSuccess = true;
			break;

		default:
			LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to create folder: " + path + " (errno: " + std::to_string(errno) + ")");
			bSuccess = false;
			break;
		}
	}
	else
	{
		bSuccess = true;
	}

	return bSuccess;
}

bool ctype_space(const char c, string adddelimiter)
{
	if (c == ' ' || c == '\t' || c == '\r' || c == '\n' || c == 11)
	{
		return true;
	}

	if (adddelimiter.find(c) != string::npos)
	{
		return true;
	}

	return false;
}

std::string trim_string_left_right(std::string istring, std::string adddelimiter)
{
	bool trimmed = false;

	if (ctype_space(istring[istring.length() - 1], adddelimiter))
	{
		istring.erase(istring.length() - 1);
		trimmed = true;
	}

	if (ctype_space(istring[0], adddelimiter))
	{
		istring.erase(0, 1);
		trimmed = true;
	}

	if ((trimmed == false) || (istring.size() == 0))
	{
		return istring;
	}
	else
	{
		return trim_string_left_right(istring, adddelimiter);
	}
}

std::string trim_string_left(std::string istring, std::string adddelimiter)
{
	bool trimmed = false;

	if (ctype_space(istring[0], adddelimiter))
	{
		istring.erase(0, 1);
		trimmed = true;
	}

	if ((trimmed == false) || (istring.size() == 0))
	{
		return istring;
	}
	else
	{
		return trim_string_left(istring, adddelimiter);
	}
}

std::string trim_string_right(std::string istring, std::string adddelimiter)
{
	bool trimmed = false;

	if (ctype_space(istring[istring.length() - 1], adddelimiter))
	{
		istring.erase(istring.length() - 1);
		trimmed = true;
	}

	if ((trimmed == false) || (istring.size() == 0))
	{
		return istring;
	}
	else
	{
		return trim_string_right(istring, adddelimiter);
	}
}

size_t find_delimiter_pos(string input, string delimiter)
{
	size_t pos = std::string::npos;
	string akt_del;

	for (int anz = 0; anz < delimiter.length(); ++anz)
	{
		akt_del = delimiter[anz];
		size_t zw = input.find(akt_del);

		if (zw != std::string::npos)
		{
			if ((pos != std::string::npos) && (zw < pos))
			{
				pos = zw;
			}
			else
			{
				pos = zw;
			}
		}
	}

	return pos;
}

bool rename_file(string from, string to)
{
	// ESP_LOGI(logTag, "Renaming File: %s", from.c_str());
	FILE *pFile = fopen(from.c_str(), "rb");

	// Sourcefile does not exist otherwise there is a mistake when renaming!
	if (!pFile)
	{
		ESP_LOGE(TAG, "RenameFile: File %s does not exist!", from.c_str());
		return false;
	}

	fclose(pFile);
	rename(from.c_str(), to.c_str());

	return true;
}

bool rename_folder(string from, string to)
{
	// ESP_LOGI(logTag, "Renaming Folder: %s", from.c_str());
	DIR *fpSourceFolder = opendir(from.c_str());

	// Sourcefolder does not exist otherwise there is a mistake when renaming!
	if (!fpSourceFolder)
	{
		ESP_LOGE(TAG, "RenameFolder: Folder %s does not exist!", from.c_str());
		return false;
	}

	closedir(fpSourceFolder);
	rename(from.c_str(), to.c_str());

	return true;
}

bool file_exists(string filename)
{
	FILE *pFile = fopen(filename.c_str(), "rb");

	// Sourcefile does not exist
	if (!pFile)
	{
		return false;
	}

	fclose(pFile);

	return true;
}

bool folder_exists(string foldername)
{
	DIR *fpSourceFolder = opendir(foldername.c_str());

	// Sourcefolder does not exist
	if (!fpSourceFolder)
	{
		return false;
	}

	closedir(fpSourceFolder);

	return true;
}

bool delete_file(string filename)
{
	// ESP_LOGI(logTag, "Deleting file: %s", filename.c_str());
	/* Delete file */
	FILE *pFile = fopen(filename.c_str(), "rb");

	// Sourcefile does not exist otherwise there is a mistake in copying!
	if (!pFile)
	{
		ESP_LOGD(TAG, "DeleteFile: File %s existiert nicht!", filename.c_str());
		return false;
	}

	fclose(pFile);
	unlink(filename.c_str());

	return true;
}

bool copy_file(string input, string output)
{
	input = format_filename(input);
	output = format_filename(output);

	if ((to_upper(input).compare(WLAN_CONFIG_FILE) == 0) || (to_upper(input).compare(NETWORK_CONFIG_FILE) == 0))
	{
		ESP_LOGD(TAG, "wlan.ini kann nicht kopiert werden!");
		return false;
	}

	FILE *fpSourceFile = fopen(input.c_str(), "rb");

	// Sourcefile existiert nicht sonst gibt es einen Fehler beim Kopierversuch!
	if (!fpSourceFile)
	{
		ESP_LOGD(TAG, "File %s existiert nicht!", input.c_str());
		return false;
	}

	FILE *fpTargetFile = fopen(output.c_str(), "wb");

	char temp_char[1024];

	// Read From The Source File - "Copy"
	while (fread(&temp_char, 1, 1, fpSourceFile) == 1)
	{
		// Write To The Target File - "Paste"
		fwrite(&temp_char, 1, 1, fpTargetFile);
	}

	// Close The Files
	fclose(fpSourceFile);
	fclose(fpTargetFile);

	ESP_LOGD(TAG, "File copied: %s to %s", input.c_str(), output.c_str());

	return true;
}

string get_file_full_filename(string filename)
{
	size_t lastpos = filename.find_last_of('/');

	if (lastpos == string::npos)
	{
		return "";
	}

	string zw = filename.substr(lastpos + 1, filename.size() - lastpos);

	return zw;
}

string get_directory(string filename)
{
	size_t lastpos = filename.find('/');

	if (lastpos == string::npos)
	{
		lastpos = filename.find('\\');
	}

	if (lastpos == string::npos)
	{
		return "";
	}

	string zw = filename.substr(0, lastpos - 1);
	return zw;
}

string get_file_type(string filename)
{
	size_t lastpos = filename.rfind(".", filename.length());
	size_t neu_pos;

	while ((neu_pos = filename.find(".", lastpos + 1)) > -1)
	{
		lastpos = neu_pos;
	}

	if (lastpos == string::npos)
	{
		return "";
	}

	string zw = filename.substr(lastpos + 1, filename.size() - lastpos);
	zw = to_upper(zw);

	return zw;
}

/* recursive mkdir */
int mkdir_r(const char *dir, const mode_t mode)
{
	char tmp[FILE_PATH_MAX];
	char *p = NULL;
	struct stat sb;
	size_t len;

	/* copy path */
	len = strnlen(dir, FILE_PATH_MAX);

	if (len == 0 || len == FILE_PATH_MAX)
	{
		return -1;
	}

	memcpy(tmp, dir, len);
	tmp[len] = '\0';

	/* remove trailing slash */
	if (tmp[len - 1] == '/')
	{
		tmp[len - 1] = '\0';
	}

	/* check if path exists and is a directory */
	if (stat(tmp, &sb) == 0)
	{
		if (S_ISDIR(sb.st_mode))
		{
			return 0;
		}
	}

	/* recursive mkdir */
	for (p = tmp + 1; *p; p++)
	{
		if (*p == '/')
		{
			*p = 0;

			/* test path */
			if (stat(tmp, &sb) != 0)
			{
				/* path does not exist - create directory */
				if (mkdir(tmp, mode) < 0)
				{
					return -1;
				}
			}
			else if (!S_ISDIR(sb.st_mode))
			{
				/* not a directory */
				return -1;
			}

			*p = '/';
		}
	}

	/* test path */
	if (stat(tmp, &sb) != 0)
	{
		/* path does not exist - create directory */
		if (mkdir(tmp, mode) < 0)
		{
			return -1;
		}
	}
	else if (!S_ISDIR(sb.st_mode))
	{
		/* not a directory */
		return -1;
	}

	return 0;
}

time_t add_days(time_t startTime, int days)
{
	struct tm *tm = localtime(&startTime);
	tm->tm_mday += days;
	return mktime(tm);
}

int remove_folder(const char *folderPath, const char *logTag)
{
	// ESP_LOGD(logTag, "Delete content in path %s", folderPath);

	DIR *dir = opendir(folderPath);

	if (!dir)
	{
		ESP_LOGE(logTag, "Failed to stat dir: %s", folderPath);
		return -1;
	}

	struct dirent *entry;
	int deleted = 0;

	while ((entry = readdir(dir)) != NULL)
	{
		std::string path = string(folderPath) + "/" + entry->d_name;

		if (entry->d_type == DT_REG)
		{
			// ESP_LOGD(logTag, "Delete file %s", path.c_str());
			if (unlink(path.c_str()) == 0)
			{
				deleted++;
			}
			else
			{
				ESP_LOGE(logTag, "can't delete file: %s", path.c_str());
			}
		}
		else if (entry->d_type == DT_DIR)
		{
			deleted += remove_folder(path.c_str(), logTag);
		}
	}

	closedir(dir);

	if (rmdir(folderPath) != 0)
	{
		ESP_LOGE(logTag, "can't delete folder: %s", folderPath);
	}

	ESP_LOGD(logTag, "%d files in folder %s deleted.", deleted, folderPath);

	return deleted;
}

std::string replace_string(std::string subject, const std::string &search, const std::string &replace)
{
	size_t pos = 0;

	while ((pos = subject.find(search, pos)) != std::string::npos)
	{
		subject.replace(pos, search.length(), replace);
		pos += replace.length();
	}

	return subject;
}

string round_output(double _in, int _anzNachkomma)
{
	std::stringstream stream;
	int temp_value = _in;

	if (_anzNachkomma > 0)
	{
		stream << std::fixed << std::setprecision(_anzNachkomma) << _in;
	}
	else
	{
		stream << temp_value;
	}

	return stream.str();
}

string get_mac(void)
{
	uint8_t macInt[6];
	char macFormated[6 * 2 + 5 + 1]; // AA:BB:CC:DD:EE:FF

	esp_read_mac(macInt, ESP_MAC_WIFI_STA);
	sprintf(macFormated, "%02X:%02X:%02X:%02X:%02X:%02X", macInt[0], macInt[1], macInt[2], macInt[3], macInt[4], macInt[5]);

	return macFormated;
}

void set_system_statusflag(SystemStatusFlag_t flag)
{
	systemStatus = systemStatus | flag; // set bit

	char buf[20];
	snprintf(buf, sizeof(buf), "0x%08X", get_system_status());
	LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "New System Status: " + std::string(buf));
}

void clear_system_statusflag(SystemStatusFlag_t flag)
{
	systemStatus = systemStatus | ~flag; // clear bit

	char buf[20];
	snprintf(buf, sizeof(buf), "0x%08X", get_system_status());
	LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "New System Status: " + std::string(buf));
}

int get_system_status(void)
{
	return systemStatus;
}

bool is_set_system_statusflag(SystemStatusFlag_t flag)
{
	// ESP_LOGE(TAG, "Flag (0x%08X) is set (0x%08X): %d", flag, systemStatus , ((systemStatus & flag) == flag));

	if ((systemStatus & flag) == flag)
	{
		return true;
	}
	else
	{
		return false;
	}
}

time_t get_uptime(void)
{
	return (uint32_t)(esp_timer_get_time() / 1000 / 1000); // in seconds
}

string get_reset_reason(void)
{
	std::string reasonText;

	switch (esp_reset_reason())
	{
	case ESP_RST_POWERON:
		reasonText = "Power-on event (or reset button)";
		break; //!< Reset due to power-on event
	case ESP_RST_EXT:
		reasonText = "External pin";
		break; //!< Reset by external pin (not applicable for ESP32)
	case ESP_RST_SW:
		reasonText = "Via esp_restart";
		break; //!< Software reset via esp_restart
	case ESP_RST_PANIC:
		reasonText = "Exception/panic";
		break; //!< Software reset due to exception/panic
	case ESP_RST_INT_WDT:
		reasonText = "Interrupt watchdog";
		break; //!< Reset (software or hardware) due to interrupt watchdog
	case ESP_RST_TASK_WDT:
		reasonText = "Task watchdog";
		break; //!< Reset due to task watchdog
	case ESP_RST_WDT:
		reasonText = "Other watchdogs";
		break; //!< Reset due to other watchdogs
	case ESP_RST_DEEPSLEEP:
		reasonText = "Exiting deep sleep mode";
		break; //!< Reset after exiting deep sleep mode
	case ESP_RST_BROWNOUT:
		reasonText = "Brownout";
		break; //!< Brownout reset (software or hardware)
	case ESP_RST_SDIO:
		reasonText = "SDIO";
		break; //!< Reset over SDIO

	case ESP_RST_UNKNOWN: //!< Reset reason can not be determined
	default:
		reasonText = "Unknown";
	}

	return reasonText;
}

/**
 * Returns the current uptime  formated ad xxf xxh xxm [xxs]
 */
std::string get_formated_uptime(bool compact)
{
	char buf[20];
#pragma GCC diagnostic ignored "-Wformat-truncation"

	int uptime = get_uptime(); // in seconds

	int days = int(floor(uptime / (3600 * 24)));
	int hours = int(floor((uptime - days * 3600 * 24) / (3600)));
	int minutes = int(floor((uptime - days * 3600 * 24 - hours * 3600) / (60)));
	int seconds = uptime - days * 3600 * 24 - hours * 3600 - minutes * 60;

	if (compact)
	{
		snprintf(buf, sizeof(buf), "%dd%02dh%02dm%02ds", days, hours, minutes, seconds);
	}
	else
	{
		snprintf(buf, sizeof(buf), "%3dd %02dh %02dm %02ds", days, hours, minutes, seconds);
	}

	return std::string(buf);
}

const char *get404(void)
{
	return "<pre>\n\n\n\n"
		   "        _\n"
		   "    .__(.)< ( oh oh! This page does not exist! )\n"
		   "    \\___)\n"
		   "\n\n"
		   "                You could try your <a href=index.html target=_parent>luck</a> here!</pre>\n"
		   "<script>document.cookie = \"page=overview.html\"</script>"; // Make sure we load the overview page
}

std::string url_decode(const std::string &value)
{
	std::string result;
	result.reserve(value.size());

	for (std::size_t i = 0; i < value.size(); ++i)
	{
		auto ch = value[i];

		if (ch == '%' && (i + 2) < value.size())
		{
			auto hex = value.substr(i + 1, 2);
			auto dec = static_cast<char>(std::strtol(hex.c_str(), nullptr, 16));
			result.push_back(dec);
			i += 2;
		}
		else if (ch == '+')
		{
			result.push_back(' ');
		}
		else
		{
			result.push_back(ch);
		}
	}

	return result;
}

bool replace_string(std::string &s, std::string const &toReplace, std::string const &replaceWith)
{
	return replace_string(s, toReplace, replaceWith, true);
}

bool replace_string(std::string &s, std::string const &toReplace, std::string const &replaceWith, bool logIt)
{
	std::size_t pos = s.find(toReplace);

	if (pos == std::string::npos)
	{
		// Not found
		return false;
	}

	std::string old = s;
	s.replace(pos, toReplace.length(), replaceWith);

	if (logIt)
	{
		LogFile.WriteToFile(ESP_LOG_INFO, TAG, "Migrated Configfile line '" + old + "' to '" + s + "'");
	}

	return true;
}

// from https://stackoverflow.com/a/14678800
void replace_all(std::string &s, const std::string &toReplace, const std::string &replaceWith)
{
	size_t pos = 0;

	while ((pos = s.find(toReplace, pos)) != std::string::npos)
	{
		s.replace(pos, toReplace.length(), replaceWith);
		pos += replaceWith.length();
	}
}

bool is_in_string(std::string &s, std::string const &toFind)
{
	std::size_t pos = s.find(toFind);

	if (pos == std::string::npos)
	{
		// Not found
		return false;
	}

	return true;
}

bool is_string_numeric(std::string &input)
{
	if (input.size() <= 0)
	{
		return false;
	}

	// Replace comma with a dot
	replace_string(input, ",", ".", false);

	int start = 0;
	int punkt_existiert_schon = 0;

	if (input[0] == '-')
	{
		start = 1;
	}

	for (int i = start; i < input.size(); i++)
	{
		if ((input[i] == '.') && (i > 0) && (punkt_existiert_schon == 0))
		{
			punkt_existiert_schon = 1;
			i++;
		}
		else if (!isdigit(input[i]))
		{
			return false;
		}
	}

	return true;
}

bool is_string_alphabetic(std::string &input)
{
	for (int i = 0; i < input.size(); i++)
	{
		if (!isalpha(input[i]))
		{
			return false;
		}
	}

	return true;
}

bool is_string_alphanumeric(std::string &input)
{
	for (int i = 0; i < input.size(); i++)
	{
		if (!isalnum(input[i]))
		{
			return false;
		}
	}

	return true;
}

bool alphanumeric_to_boolean(std::string &input)
{
	if (is_string_alphabetic(input))
	{
		return string_to_boolean(to_upper(input));
	}
	else if (is_string_numeric(input))
	{
		return numeric_str_to_boolean(input);
	}

	return false;
}

int clip_int(int input, int high, int low)
{
	if (input < low)
	{
		input = low;
	}
	else if (input > high)
	{
		input = high;
	}
	return input;
}

bool numeric_str_to_boolean(std::string input)
{
	return (std::stoi(input) != 0);
}

bool string_to_boolean(std::string input)
{
	return (input == "TRUE");
}