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

// #pragma warning(disable : 4996)

#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>

#ifdef __cplusplus
extern "C"
{
#endif
#include <dirent.h>
#ifdef __cplusplus
}
#endif

#include <string.h>
#include <esp_log.h>
#include <esp_mac.h>
#include <esp_timer.h>
#include "../../include/defines.h"

#include "ClassLogFile.h"

#include "esp_vfs_fat.h"
#include "../sdmmc_common.h"

static const char *TAG = "HELPER";

using namespace std;

unsigned int systemStatus = 0;

sdmmc_cid_t SDCardCid;
sdmmc_csd_t SDCardCsd;
bool SDCardIsMMC;

// #define DEBUG_DETAIL_ON

/////////////////////////////////////////////////////////////////////////////////////////////
string getESPHeapInfo()
{
	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 getESPHeapSize()
{
	return heap_caps_get_free_size(MALLOC_CAP_8BIT);
}

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

string getSDCardPartitionSize()
{
	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 / SDCardCsd.sector_size); // corrected by SD Card sector size (usually 512 bytes) and convert to MB

	// ESP_LOGD(TAG, "%d MB total drive space (Sector size [bytes]: %d)", (int)tot_sect, (int)fs->ssize);

	return std::to_string(tot_sect);
}

string getSDCardFreePartitionSpace()
{
	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 / SDCardCsd.sector_size); // corrected by SD Card sector size (usually 512 bytes) and convert to MB

	// ESP_LOGD(TAG, "%d MB free drive space (Sector size [bytes]: %d)", (int)fre_sect, (int)fs->ssize);

	return std::to_string(fre_sect);
}

string getSDCardPartitionAllocationSize()
{
	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;

	// ESP_LOGD(TAG, "SD Card Partition Allocation Size: %d bytes", allocation_size);

	return std::to_string(allocation_size);
}

void SaveSDCardInfo(sdmmc_card_t *card)
{
	SDCardCid = card->cid;
	SDCardCsd = card->csd;
	SDCardIsMMC = card->is_mmc;
}

string getSDCardManufacturer()
{
	string SDCardManufacturer = SDCardParseManufacturerIDs(SDCardCid.mfg_id);
	// ESP_LOGD(TAG, "SD Card Manufacturer: %s", SDCardManufacturer.c_str());

	return (SDCardManufacturer + " (ID: " + std::to_string(SDCardCid.mfg_id) + ")");
}

string getSDCardName()
{
	char *SDCardName = SDCardCid.name;
	// ESP_LOGD(TAG, "SD Card Name: %s", SDCardName);

	return std::string(SDCardName);
}

string getSDCardCapacity()
{
	int SDCardCapacity = SDCardCsd.capacity / (1024 / SDCardCsd.sector_size) / 1024; // total sectors * sector size  --> Byte to MB (1024*1024)
	// ESP_LOGD(TAG, "SD Card Capacity: %s", std::to_string(SDCardCapacity).c_str());

	return std::to_string(SDCardCapacity);
}

string getSDCardSectorSize()
{
	int SDCardSectorSize = SDCardCsd.sector_size;
	// ESP_LOGD(TAG, "SD Card Sector Size: %s bytes", std::to_string(SDCardSectorSize).c_str());

	return std::to_string(SDCardSectorSize);
}

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

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

std::string FormatFileName(std::string input)
{
#ifdef ISWINDOWS_TRUE
	input.erase(0, 1);
	std::string os = "/";
	std::string ns = "\\";
	FindReplace(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 FindReplace(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 MakeDir(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 (MakeDir(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;
}

string trim(string istring, 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(istring, adddelimiter);
	}
}

size_t findDelimiterPos(string input, string delimiter)
{
	size_t pos = std::string::npos;
	// size_t zw;
	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 RenameFile(string from, string to)
{
	//	ESP_LOGI(logTag, "Deleting file: %s", fn.c_str());
	/* Delete file */
	FILE *fpSourceFile = fopen(from.c_str(), "rb");

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

	fclose(fpSourceFile);

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

	return true;
}

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

	// Sourcefile existiert nicht sonst gibt es einen Fehler beim Kopierversuch!
	if (!fpSourceFile)
	{
		return false;
	}

	fclose(fpSourceFile);

	return true;
}

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

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

	fclose(fpSourceFile);

	unlink(fn.c_str());

	return true;
}

bool CopyFile(string input, string output)
{
	input = FormatFileName(input);
	output = FormatFileName(output);

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

	char cTemp;
	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");

	// Code Section

	// Read From The Source File - "Copy"
	while (fread(&cTemp, 1, 1, fpSourceFile) == 1)
	{
		// Write To The Target File - "Paste"
		fwrite(&cTemp, 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 getFileFullFileName(string filename)
{
	size_t lastpos = filename.find_last_of('/');

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

	//	ESP_LOGD(TAG, "Last position: %d", lastpos);

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

	return zw;
}

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

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

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

	//	ESP_LOGD(TAG, "Directory: %d", lastpos);

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

string getFileType(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 = toUpper(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;
}

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

	return in;
}

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

	return in;
}

// CPU Temp
extern "C" uint8_t temprature_sens_read();
float temperatureRead()
{
	return (temprature_sens_read() - 32) / 1.8;
}

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

int removeFolder(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 += removeFolder(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::vector<string> HelperZerlegeZeile(std::string input, std::string _delimiter = "")
{
	std::vector<string> Output;
	std::string delimiter = " =,";

	if (_delimiter.length() > 0)
	{
		delimiter = _delimiter;
	}

	return ZerlegeZeile(input, delimiter);
}

std::vector<string> ZerlegeZeile(std::string input, std::string delimiter)
{
	std::vector<string> Output;
	/* The input can have multiple formats:
	 *  - key = value
	 *  - key = value1 value2 value3 ...
	 *  - key value1 value2 value3 ...
	 *
	 * Examples:
	 *  - ImageSize = VGA
	 *  - IO0 = input disabled 10 false false
	 *  - main.dig1 28 144 55 100 false
	 *
	 * This causes issues eg. if a password key has a whitespace or equal sign in its value.
	 * As a workaround and to not break any legacy usage, we enforce to only use the
	 * equal sign, if the key is "password"
	 */
	if ((input.find("password") != string::npos) || (input.find("Token") != string::npos))
	{
		// Line contains a password, use the equal sign as the only delimiter and only split on first occurrence
		size_t pos = input.find("=");
		Output.push_back(trim(input.substr(0, pos), ""));
		Output.push_back(trim(input.substr(pos + 1, string::npos), ""));
	}
	else
	{
		// Legacy Mode
		input = trim(input, delimiter); // sonst werden delimiter am Ende (z.B. == im Token) gelöscht)
		size_t pos = findDelimiterPos(input, delimiter);
		std::string token;

		while (pos != std::string::npos)
		{
			token = input.substr(0, pos);
			token = trim(token, delimiter);
			Output.push_back(token);
			input.erase(0, pos + 1);
			input = trim(input, delimiter);
			pos = findDelimiterPos(input, delimiter);
		}

		Output.push_back(input);
	}

	return Output;
}

std::string ReplaceString(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;
}

/* 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 = 0x08,
		.manufacturer = "Silicon Power",
	},
	{
		.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 = "Unknown",
	},
};

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 SDCardParseManufacturerIDs(int id)
{
	if (SDCardIsMMC)
	{
		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 RundeOutput(double _in, int _anzNachkomma)
{
	std::stringstream stream;
	int _zw = _in;
	//    ESP_LOGD(TAG, "AnzNachkomma: %d", _anzNachkomma);

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

	return stream.str();
}

string getMac(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 setSystemStatusFlag(SystemStatusFlag_t flag)
{
	systemStatus = systemStatus | flag; // set bit

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

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

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

int getSystemStatus(void)
{
	return systemStatus;
}

bool isSetSystemStatusFlag(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 getUpTime(void)
{
	return (uint32_t)(esp_timer_get_time() / 1000 / 1000); // in seconds
}

string getResetReason(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 getFormatedUptime(bool compact)
{
	char buf[20];
#pragma GCC diagnostic ignored "-Wformat-truncation"

	int uptime = getUpTime(); // 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 UrlDecode(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 replaceString(std::string &s, std::string const &toReplace, std::string const &replaceWith)
{
	return replaceString(s, toReplace, replaceWith, true);
}

bool replaceString(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_ERROR, TAG, "Migrated Configfile line '" + old + "' to '" + s + "'");
	}

	return true;
}

bool isInString(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;
}

// from https://stackoverflow.com/a/14678800
void replaceAll(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 isStringNumeric(std::string &input)
{
	if (input.size() <= 0)
	{
		return false;
	}
    
	// Replace comma with a dot
	replaceString(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 isStringAlphabetic(std::string &input)
{
	for (int i = 0; i < input.size(); i++)
	{
		if (!isalpha(input[i]))
		{
			return false;
		}
	}

	return true;
}

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

	return true;
}

bool alphanumericToBoolean(std::string &input)
{
	if (isStringAlphabetic(input))
	{
		return stringToBoolean(toUpper(input));
	}
	else if (isStringNumeric(input))
	{
		return numericStrToBool(input);
	}

	return false;
}

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

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

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