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utilities.cpp
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utilities.cpp
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/*********************************************************************
* Author: Patrick Rice
* Date: 10/5/2017
* Description: The implementation of the Utilities class. Class is
* meant to provide functions that are common and useful.
*********************************************************************/
#include "utilities.hpp"
#include <sstream>
#include <iomanip>
using std::stringstream;
using std::cout;
using std::cin;
using std::endl;
using std::stoi;
using std::string;
using std::fstream;
/*********************************************************************
* Integer validation. Takes the entire line as a string,
* finds the integer in the string. Also checks if the input
* is a float with "." check. Takes in two parameters that
* define the range of the acceptable int.
*
* @param min is the minimum acceptable.
* @param max is the maximum acceptable.
*
* Sources cited:
* stringstream: https://stackoverflow.com/questions/16987461/extraction-of-integers-from-strings
*********************************************************************/
unsigned int getInt(unsigned int min, unsigned int max) {
bool validInput = false;
unsigned int validInt = 0;
string userInput;
do {
getline(cin, userInput);
stringstream ss(userInput);
if (ss >> validInt) {
//found an integer!
string decimal(".");
if (userInput.find(decimal) != string::npos) {
//found a decimal
cout << "The selection must be a whole number!"
<< endl;
} else {
//pass as a whole number and not a long string.
//now check if its in the range
if (validInt < min || validInt > max) {
cout << "The selection must be between "
<< min << " and "
<< max << endl;
cout << "You input: " << validInput << endl;
} else {
//it's all good!
validInput = true;
}
}
} else {
//did not find an integer!
cout << "Please enter a number!" << endl;
}
if (!validInput) {
//reprompt for an input!
cout << "Please enter a different selection: ";
}
} while (!validInput);
return validInt;
}
/*********************************************************************
* Double validation. Takes the entire line as a string,
* finds the double in the string. Takes in two parameters that
* define the range of the acceptable double.
*
* @param min is the minimum acceptable.
* @param max is the maximum acceptable.
*********************************************************************/
double getDouble(double min, double max) {
bool validInput = false;
double validDouble = 0;
string userInput;
do {
getline(cin, userInput);
stringstream ss(userInput);
if (ss >> validDouble) {
//found an Double!
if (userInput.size() > max || userInput.size() < min) {
//not in the range of acceptable inputs.
cout << "The selection must be between "
<< min + 1 << " and "
<< max << endl;
} else {
//pass as a whole number and not a long string.
//now check if its in the range
if (validDouble < min || validDouble > max) {
cout << "The selection must be between "
<< min << " and "
<< max << endl;
} else {
//it's all good!
validInput = true;
}
}
}
} while (!validInput);
return validDouble;
}
/*********************************************************************
* String validation. Takes the entire line as a string.
*
* @param min is the minimum length acceptable.
* @param max is the maximum length acceptable.
*********************************************************************/
string getString(unsigned int min, unsigned int max) {
bool validInput = false;
unsigned int containsInt = 0;
string userInput;
do {
getline(cin, userInput);
stringstream ss(userInput);
if (ss >> containsInt) {
cout << "The word cannot contain numbers!" << endl;
}
//found an integer!
string decimal(".");
string space(" ");
if (userInput.find(decimal) != string::npos) {
//found a decimal
cout << "The word cannot contain decimals!"
<< endl;
} else if (userInput.size() > max || userInput.size() < min) {
//not in the range of acceptable inputs.
cout << "The word must be between "
<< min + 1 << " and "
<< max << " letters long" << endl;
} else if (userInput.find(space) != string::npos) {
cout << "The word cannot contain a space!" << endl;
} else {
//it's all good!
validInput = true;
}
if (!validInput) {
//reprompt for an input!
cout << "Please enter a different selection: ";
}
} while (!validInput);
return userInput;
}
/*********************************************************************
* Takes a string and formats the output to have a border on the left
* and the right of the output.
*
* @input is the string to be formatted
* @width is the width of the box the string will be inside
********************************************************************/
void printBoxLine(string input, int width) {
//get string length
int stringLength = static_cast<int>(input.length());
//left border
string output = "| ";
output += input;
//fill empty space of the box
for (int i = 0; i < width - 2 - stringLength; ++i) {
output += " ";
}
//right border
output += "|\n";
cout << output;
}
/*********************************************************************
* Takes a string and formats the output to have the string in the
* center of the line with a "-" border around it.
*
* @input is the string to be formatted
* @width is the width of the box the string will be inside
********************************************************************/
void printCenterTitle(string input, int width) {
string output;
int stringLength = input.length();
bool stringEven = isEven(static_cast<int>(stringLength));
bool widthEven = isEven(width);
int stringHalf = stringLength / 2;
int widthHalf = width / 2;
//left border
output = "+";
// Number of dashes will depend on the number of characters
// in the string and the width of the box. There are four
// possible cases.
if (stringEven) {
if (widthEven) {
for (int i = 1; i < widthHalf - stringHalf; ++i) {
output += "-";
}
output += " " + input + " ";
for (int i = 1; i < widthHalf - stringHalf - 1; ++i) {
output += "-";
}
} else {
for (int i = 2; i < widthHalf - stringHalf; ++i) {
output += "-";
}
output += " " + input + " ";
for (int i = 2; i < widthHalf - stringHalf; ++i) {
output += "-";
}
}
} else {
if (widthEven) {
for (int i = 1; i < widthHalf - stringHalf; ++i) {
output += "-";
}
output += " " + input + " ";
for (int i = 1; i < widthHalf - stringHalf; ++i) {
output += "-";
}
} else {
for (int i = 2; i < widthHalf - stringHalf; ++i) {
output += "-";
}
output += " " + input + " ";
for (int i = 1; i < widthHalf - stringHalf; ++i) {
output += "-";
}
}
}
//right border
output += "+\n";
cout << output;
}
/*********************************************************************
* Takes a string and formats the output to have the string in the
* center of the line with a "=" border around it.
*
* @input is the string to be formatted
* @width is the width of the box the string will be inside
********************************************************************/
void printBoldCenterTitle(string input, int width) {
string output;
int stringLength = input.length();
bool stringEven = isEven(static_cast<int>(stringLength));
bool widthEven = isEven(width);
int stringHalf = stringLength / 2;
int widthHalf = width / 2;
//left border
output = "+";
// Number of dashes will depend on the number of characters
// in the string and the width of the box. There are four
// possible cases.
if (stringEven) {
if (widthEven) {
for (int i = 1; i < widthHalf - stringHalf; ++i) {
output += "=";
}
output += " " + input + " ";
for (int i = 1; i < widthHalf - stringHalf - 1; ++i) {
output += "=";
}
} else {
for (int i = 2; i < widthHalf - stringHalf; ++i) {
output += "=";
}
output += " " + input + " ";
for (int i = 2; i < widthHalf - stringHalf; ++i) {
output += "=";
}
}
} else {
if (widthEven) {
for (int i = 1; i < widthHalf - stringHalf; ++i) {
output += "=";
}
output += " " + input + " ";
for (int i = 1; i < widthHalf - stringHalf; ++i) {
output += "=";
}
} else {
for (int i = 2; i < widthHalf - stringHalf; ++i) {
output += "=";
}
output += " " + input + " ";
for (int i = 1; i < widthHalf - stringHalf; ++i) {
output += "=";
}
}
}
//right border
output += "+\n";
cout << output;
}
/*********************************************************************
* Prints a border with "-" dependent on the width given.
*
* @param width is the width of the border.
********************************************************************/
void printBorder(int width) {
string output;
output += "+";
for (int i = 1; i < width; ++i) {
output += "-";
}
output += "+\n";
cout << output;
}
/*********************************************************************
* Returns whether or not a given number is even or odd.
* @param number is the number to be evaluated.
********************************************************************/
bool isEven(int number) {
return number % 2 == 1;
}
/*********************************************************************
* Formats a statement with a string and a dollar amount. Prints
* the statement.
* @param prefix the left side of the statement.
* @param money is the dollar amount.
* @param width is the width of the box.
********************************************************************/
void printMoneyStatement(string prefix, double money, int width) {
// Conversion found here:
// https://stackoverflow.com/questions/29200635/convert-float-to-string-with-set-precision-number-of-decimal-digits
stringstream total;
stringstream dollarAmount;
dollarAmount << "$" << std::fixed << std::setprecision(2) << money;
printLeftAndRightAlignedStrings(prefix, dollarAmount.str(), width);
}
/*********************************************************************
* Formats a statement with a string and a value that displays two
* decimals. Prints the statement.
* @param prefix is the prefix of the statement
* @param value is the value on the right
* @param width is the width of the box
********************************************************************/
void printTwoDecimalStatement(string prefix, double value, int width) {
stringstream twoDecimalValue;
twoDecimalValue << std::fixed << std::setprecision(2) << value;
printLeftAndRightAlignedStrings(prefix, twoDecimalValue.str(), width);
}
/*********************************************************************
* Formats and returns a double as a two decimal string.
* @param double is the value to be formatted.
********************************************************************/
string formatTwoDecimalDouble(double value) {
stringstream twoDecimalValue;
twoDecimalValue << std::fixed << std::setprecision(2) << value;
return twoDecimalValue.str();
}
/*********************************************************************
* Prints one line with a left aligned string and a right aligned
* string.
*
* @param prefix is the left side of the statement.
* @param suffix is the right side of the statement
* @param width is the width of the box.
********************************************************************/
void printLeftAndRightAlignedStrings(string prefix, string suffix, int width) {
string total = prefix + suffix;
//get length of entire string
int stringLength = static_cast<int>(total.length());
//left border
string output = "| ";
output += prefix;
//fill empty space of the box
for (int i = 0; i < width - 3 - stringLength; ++i) {
output += " ";
}
output += suffix + " ";
//right border
output += "|\n";
cout << output;
}
/*********************************************************************
* Gets a string with multiple words in it.
********************************************************************/
string getMultiWordString() {
bool validInput = false;
string userInput;
do {
getline(cin, userInput);
stringstream ss(userInput);
if (ss.str().empty()) {
cout << "Field cannot be left blank!" << endl;
cout << "Please enter your selection: ";
} else {
validInput = true;
}
} while (!validInput);
return userInput;
}
/*********************************************************************
* Prompts the user to enter a multiline address.
********************************************************************/
string getAddress() {
bool validInput = false;
string userInput, address;
do {
cout << "Please enter Address line 1: ";
getline(cin, userInput);
stringstream ss(userInput);
cout << "Please enter Address line 2: ";
getline(cin, userInput);
stringstream ss2(userInput);
if (ss.str().empty() && ss2.str().empty()) {
cout << "Field cannot be left blank!";
} else {
validInput = true;
address += ss.str() + " " + ss2.str();
}
} while (!validInput);
return address;
}