/**
* @brief updateField changes the value of a given field on the whole database.
* @param newData new information to be inserted.
* @param pFile the database to be used
* @param pRow
* @param pColumn
*/
bool writefile::updateField(string newData, string pFile , int pRow , int pColumn){
int currSeek = file.tellg();
int sizeToColumn;
int cSize;
bool bowl = true;
//Relative route + the name of the file
if ( !(file.is_open()) ){
string fileH = pFile;
string standardDir = createNewFile(fileH.c_str());
file.open(standardDir.c_str());
}
if ( !(file.is_open()) ){
cout << "NED " + pFile << endl;
bowl = false;
}
placeSeekOn(&pRow , &pColumn, &sizeToColumn, &cSize);
fillString(&newData,cSize);
if (file.is_open()){
file << newData;
}
file.seekg(currSeek);
if (file.is_open()){
file.close();
}
return bowl;
}
/**
* @brief readField returns the data readed on field of the database.
* @param pFile is the name of the file to be readed from.
* @param pRow is the row of the desired data.
* @param Column is the column of the desired data.
* @return
*/
string readfile::readField(string pFile , int pRow , int pColumn){
int currSeek =file.tellg();
int sizeToColumn;
int cSize;
//Relative route + the name of the file
if ( !(file.is_open()) ){
string standardDir = createNewFile(&pFile);
file.open(standardDir.c_str());
}
if ( !(file.is_open()) ){
return "NED " + pFile;
}
placeSeekOn(&pRow , &pColumn, &sizeToColumn, &cSize);
//build the stringto return
string stringToReturn = "";
for (int i = 0 ; i < cSize ; i++){
char currChar = file.get();
if (currChar != '*'){
stringToReturn.push_back(currChar);
}else{
break;
}
}
file.seekg(currSeek);
if (stringToReturn == "") stringToReturn = "404";
return stringToReturn;
}
/**
* @brief updateColumn From pCname of pFile, replace pToCompare with newData
* @param newData
* @param pToCompare
* @param pFile
* @param pCName
*/
bool writefile::updateColumn(string newData,string pToCompare, string pFile, string pCName){
int currSeek = file.tellg();
int sizeToColumn;
int cSize;
string standardDir;
bool bowl = true;
//Relative route + the name of the file
if ( !(file.is_open()) ){
string fileH = pFile;
standardDir = createNewFile(fileH.c_str());
file.open(standardDir.c_str());
}
if ( !(file.is_open()) ){
cout << "NED " + pFile << endl;
bowl = false;
}
int Column = getColumnNumber(&standardDir , &pCName );
int regQty = getRegisterQuantity();
string currentData = K->EMPTY_STRING;
for (int rowCounter = K->ONE_BYTE ; rowCounter <= regQty ; rowCounter++){
//Move the seek to the column and register.
placeSeekOn( &rowCounter , &Column, &sizeToColumn, &cSize);
//Build the string of the old data
for (int i = 0 ; i < cSize ; i++){
char temp = file.get();
if (temp == '*'){
break;
}else{
currentData.push_back(temp);
}
}
//Compare data.
if (currentData == pToCompare){
updateField(newData, pFile , rowCounter , Column);
}else{
currentData = K->EMPTY_STRING;
}
}
file.seekg(currSeek);
if (file.is_open()){
file.close();
}
return bowl;
}
bool writefile::deleteRegister(string pFile, string pCName, string newData){
int currSeek = file.tellg();
int Column;
int cSize;
string standardDir;
bool bowl = true;
//Relative route + the name of the file
if ( !(file.is_open()) ){
standardDir = createNewFile(pFile.c_str());
file.open(standardDir.c_str());
}
if ( !(file.is_open()) ){
cout << "NED " + pFile << endl;
return false;
}
Column = getColumnNumber(&standardDir , &pCName );
cSize = getRegisterSize();
int regQty = getRegisterQuantity();
string voidField = K->EMPTY_STRING;
int sizeToColumn = sizeUntilColumn(Column);
fillString(&voidField,cSize);
cout << voidField.length() <<endl;
for (int rowCounter = K->ONE_BYTE ; rowCounter <= regQty ; rowCounter++){
//Compare data.
if (readField(pFile , rowCounter , Column) == newData){
placeSeekOn(&rowCounter , &Column, &sizeToColumn, &cSize);
if (file.is_open()){
file << voidField;
} else {
bowl = false;
}
}
}
file.seekg(currSeek);
if (file.is_open()){
file.close();
}
return bowl;
}
