grabs user's phone number (works on el capitan)

grabnumber.cpp

#include <iostream>
#include <string>
#include <vector>
#include <stdlib.h>
#include <unistd.h>
#include <math.h> 
#include <cstdio>
#include <memory>
#include <stdexcept>
#include <fstream>
#include <cstdlib>

using namespace std;
string getPhoneNumber(string name, string username);
string exec(const char* cmd);
void removeExtraneousCharacters(string& s);
string keepOnlyPhone(string& p);
void formatNumber (string& n);

int main(int argc, char *argv[]) {
	string name = exec("osascript -e 'tell application \"System Events\"' -e 'return full name of current user' -e 'end tell'");
	//string name = "Ander";
	name.erase(remove(name.begin(), name.end(), '\n'), name.end());
	string username = exec("whoami");
	username.erase(remove(username.begin(), username.end(), '\n'), username.end());
	cout << getPhoneNumber(name,username) << endl;
}

string exec(const char* cmd) {
	char buffer[128];
	string result = "";
	shared_ptr<FILE> pipe(popen(cmd, "r"), pclose);
	if (!pipe) throw runtime_error("popen() failed!");
	while (!feof(pipe.get())) {
		if (fgets(buffer, 128, pipe.get()) != NULL)
			result += buffer;
	}
	return result;
}

string getPhoneNumber(string name, string username) {
	size_t space = name.find(" ");
	string firstName = "";
	string lastName = "";
	if (space != -1) {
		firstName = name.substr(0, space);
		lastName = name.substr(space);
	} else {
		firstName = name;
		lastName = "";
	}
	
	string cFile = exec(("cd && cd Library/Application\\ Support/AddressBook/Sources/ && grep -ril " + firstName + " * | xargs grep -ril " + lastName).c_str());
	//cout << "file = " << cFile << "endOfCFile" << endl;
	if (cFile.length() == 0) {
		return "No number found!";
	}
	
	vector <string> locations;
	int index = 0;
	while (index >= 0) {
		int newIndex = cFile.find("\n", index+1);
		string s = cFile.substr(index, newIndex-index);
		s.erase(remove(s.begin(), s.end(), '\n'), s.end());
		locations.push_back(s);
		index = newIndex;
	}
	
	int largest = 0;
	for (int i = 1; i < locations.size(); i++) {
		if (locations.at(i).length() > locations.at(largest).length()) {
			largest = i;
		}
	}
	cFile = locations.at(largest);
	//cout << "cFile = " << cFile << endl;
	/*for (int i = 0; i < locations.size(); i++) {
		cout << i << ": " << locations.at(i) << endl;
	}*/
	
	string location = "/Users/" + username + "/Library/Application Support/AddressBook/Sources/" + cFile;
	
	if (location == ("/Users/" + username + "/Library/Application Support/AddressBook/Sources/")) {
		return "no phone number";
	}
	
	//clog << "location: " << location << endl;
		
	ifstream path(location);
	string fileContents((istreambuf_iterator<char>(path)), istreambuf_iterator<char>());
	
	size_t mobile = fileContents.find("<Mobile>");
	size_t start = fileContents.find("(", mobile);
	
	int endIndex = mobile+14;
	cout << "endIndex: " << endIndex << endl;
	//cout << fileContents.at(endIndex+3) << " & " << fileContents.at(endIndex+4) << " & " << fileContents.at(endIndex+5) << endl;
	while (isdigit(fileContents.at(endIndex+3)) || isdigit(fileContents.at(endIndex+4)) || isdigit(fileContents.at(endIndex+5))) {
		endIndex++;
	}
	endIndex -= 3;
	//cout << "endIndex: " << endIndex << endl;
	
	//cout << "length = " << endIndex-mobile << endl;

	//string phoneNumber = fileContents.substr(mobile+14, endIndex-mobile-8);
	string phoneNumber = fileContents.substr(mobile+14, 100);
	removeExtraneousCharacters(phoneNumber);
	phoneNumber = keepOnlyPhone(phoneNumber);
	formatNumber(phoneNumber);
	return phoneNumber;
}

void removeExtraneousCharacters(string& s) {
	vector <int> indexToBeErased;
	for (int i = 0; i < s.length(); i++) {
		char chr = s.at(i);
		
		if (!isdigit(chr)) {
			//cout << chr << ":" << (int)chr << " is not a digit" << endl;
			//s.erase (s.begin()+i);
			indexToBeErased.push_back(i);
		} else {
			//cout << chr << ":" << (int)chr << " is a digit" << endl;
		}
	}
	for (int i = indexToBeErased.size() - 1; i >= 0; i--) {
		s.erase (s.begin()+indexToBeErased.at(i));
	}
}

string keepOnlyPhone(string& p) {
	int i = 0;
	vector <char> digits;
	while (digits.size() < 10) {
		char chr = p.at(i);
		if (chr == '1' && i == 0) {
			//do nothing because it's the country code for USA
		}
		else if (isdigit(chr)) {
			digits.push_back(chr);
		}
		i++;
	}
	
	//cout << digits.size() << " digits" << endl;
	string number = "";
	for (int i = 0; i < digits.size(); i++) {
		number += digits.at(i);
	}
	return number;
}

void formatNumber(string& n) {
	n.insert(0,1,'(');
	n.insert(4,1,')');
	n.insert(5,1, ' ');
	n.insert(9,1,'-');
}

Not meant for macOS as it seems the data for the contacts are encrypted