S3_Cpp/Aufg3/Phonebook.cpp

#include <fstream>
#include <iostream>
#include <string>
#include <vector>

typedef struct contacts{
	std::string firstName;
	std::string lastName;
	int number;
} Kontaktdaten;


void addContact(Kontaktdaten* person, std::vector<Kontaktdaten*> *Telefonbuch) {
	Telefonbuch->push_back(person);
	// std::vector<Kontaktdaten *> buch = *Telefonbuch;
	// buch.push_back(person);
}

void deleteAllContacts(std::vector<Kontaktdaten*> *Telefonbuch) {
	for (Kontaktdaten* pointer: *Telefonbuch) {
		delete pointer;
	}
}

void printAllContacts(std::vector<Kontaktdaten*> *Telefonbuch) {
	for (Kontaktdaten * personpointer: *Telefonbuch) {
		Kontaktdaten person = *personpointer;
		std::cout << person.firstName << " " << person.lastName << " " << person.number << std::endl;
	}
}

void saveAllContacts(std::vector<Kontaktdaten*> *Telefonbuch, std::string *fileName) {
	std::ofstream outfile;
	outfile.open(*fileName);

	for (Kontaktdaten * personpointer: *Telefonbuch) {
		Kontaktdaten person = *personpointer;
		outfile << person.firstName << std::endl << person.lastName << std::endl << person.number << std::endl;
	}

	outfile.close();
}

int exponentiate(int base, int exponent) {
	int result = 1;
	while (exponent > 0) {
		result *= base;
		exponent--;
	}
	return result;
}

int intStringToInt(std::string input) {
	int result = 0;

	int size = input.length();
	for(int i = 0; i < size; i++) {
		int digit = input[size - 1 - i] - '0'; // -1 to consider 0-index	// -'0' to get ascii indicies right
		result += digit * exponentiate(10, i); // shift digit
	}

	return result;
}

void readContactsFromFile(std::vector<Kontaktdaten*> *Telefonbuch, std::string *fileName) {
	std::ifstream infile;
	infile.open(*fileName);

	if (!infile.is_open()) {
		std::cout << "File does not exist" << std::endl;
		return;
	}

	std::string line;
	int counter = 0;
	Kontaktdaten * personpointer = new Kontaktdaten;
	while (std::getline(infile, line)) {

		int attribute = counter % 3;
		counter++;

		switch (attribute) {
			case 0:
				personpointer->firstName = line;
				break;
			case 1:
				personpointer->lastName = line;
				break;
			case 2:
				personpointer->number = intStringToInt(line);
				addContact(personpointer, Telefonbuch);
				personpointer = new Kontaktdaten;
				break;
			default:
				std::cout << "This should never happen" << std::endl;
		}
	}

	infile.close();
}

void addFirstSetOfContacts(std::vector<contacts*> * Telefonbuch) {
	auto * Robin = new Kontaktdaten;
	auto * Saxo = new Kontaktdaten;
	auto * Jesus = new Kontaktdaten;

	Robin->number = 123456;
	Robin->firstName = "Robin";
	Robin->lastName = "Schnaiter";

	Saxo->number = 987654;
	Saxo->firstName = "Saxobastian";
	Saxo->lastName = "Brosch";

	Jesus->number = 666;
	Jesus->firstName = "Jesus";
	Jesus->lastName = "Nazarett";

	addContact(Robin, Telefonbuch);
	addContact(Saxo, Telefonbuch);
	addContact(Jesus, Telefonbuch);
}

void addSecondSetOfContacts(std::vector<contacts*> * Telefonbuch) {
	auto * Bruno = new Kontaktdaten;
	auto * Peter = new Kontaktdaten;
	auto * Ralf = new Kontaktdaten;

	Bruno->number = 462581;
	Bruno->firstName = "Bruno";
	Bruno->lastName = "Braunbär";

	Peter->number = 110;
	Peter->firstName = "Peter";
	Peter->lastName = "Polizei";

	Ralf->number = 9999;
	Ralf->firstName = "Ralf";
	Ralf->lastName = "Rotbart";

	addContact(Bruno, Telefonbuch);
	addContact(Peter, Telefonbuch);
	addContact(Ralf, Telefonbuch);
}
/*
Kontaktdaten * createContact(std::string firstName, std::string lastName, int number) {
	Kontaktdaten person = new Kontaktdaten;

	person.firstName = firstName;
	person.lastName = lastName;
	person.number = number;

	return & person;
}
*/

void Aufg3Main() {
	std::string fileName = "../Aufg3/IO-Files/phonebook.thorsten";
	std::vector<Kontaktdaten*> Telefonbuch;

	for (int i=0; i<1; i++) {
		readContactsFromFile(&Telefonbuch, &fileName);
		std::cout << "Done with reading " << i << std::endl;
	}

	/*
	*Robin->number = 123456;
	Robin->firstName = "Robin der Neue";
	Robin->lastName = "Schnaiter";

	Saxo->number = 987654;
	Saxo->firstName = "Saxobastian";
	Saxo->lastName = "Broschianer";

	Jesus->number = 6666666;
	Jesus->firstName = "Jesus";
	Jesus->lastName = "Nazarett";
	*/

	// addFirstSetOfContacts(&Telefonbuch);
	addSecondSetOfContacts(&Telefonbuch);

	// printAllContacts(&Telefonbuch);
	saveAllContacts(&Telefonbuch, &fileName);
	deleteAllContacts(&Telefonbuch);

	/*
	 *	 IDE beschwert sich bei Erstellen von * Robin über leaked Memory
	 *	 deleteAllContacts() sollte den Speicher befreien
	 *
	 *	 Zugriff auf *Robin nach delete Statement führt zu Fehler?
	 *	 -> IDE ist zu dumm?
	 */

	//
	// std::cout << Robin << std::endl;
	// auto test = *Robin;
	// std::cout << test.firstName << std::endl;
	}