c++ additional code to function that add new user to db

Library.cpp #include "User.h" #include "Book.h" #include "Library.h" #include #include #include #include

using namespace std;

int Library::readBooks(string bFileName) { int chklinesize; string lines; string words[200]; ifstream fileBooks; fileBooks.open(bFileName, ios::in);

if (fileBooks.is_open()) { while (getline(fileBooks, lines)) { //Get the length of the lines chklinesize = lines.length(); //lines = lines.substr(0, chklinesize - 1); lines = lines.substr(0, chklinesize);

Split(lines, ',', words, 5);

//Update the author and title data members for a Book oject Book b(words[1], words[0]); cout << words[1] << " by " << words[0] << endl;

books[numBooks] = b;

//Update the total number of books in the system (from all the files read so far) numBooks++; } return numBooks; } else { return -1; } }

int Library::readRatings(string rFileName) { string lines; string words[200]; int ratings[200];

ifstream fileRate; fileRate.open(rFileName);

while (getline(fileRate, lines)) { Split(lines, ',', words, 5); string username = words[0];

cout << username << "..." << endl;

int numRatings = Split(words[1], ' ', words, 200); for (int i = 0; i < numRatings - 1; i++) { ratings[i] = stoi(words[i]); //cout << ratings[i] << endl; }

User u(username, ratings, numRatings - 1); users[numUsers] = u; numUsers++;

} return numUsers; }

int Library::Split(string bookline, char delimiter, string words[], int max) { int wordCount = 0; int num = 0; int listSize; char ch; ch = delimiter; string temp;

temp = ""; listSize = bookline.length();

if (listSize == 0) return 0; else { //for (int i = 0; i < listSize; i++) for (int i = 0; i < listSize; i++) { if (bookline[i] != ch) { temp = temp + bookline[i]; } else { words[wordCount] = temp; temp = ""; wordCount += 1; }

}

words[wordCount] = temp; //

}

return wordCount; }

Library::Library() {

numBooks = 0; numUsers = 0;

}

void Library::viewRatings(string viewUser) { int vindex = 0; int count = 0; vindex = Library::getIndexId(viewUser); for (int i = 0; i < 86; i++) { cout << books[i].getTitle() << " " << endl; } int j = 0; j = numBooks; for (int i = 0; i < numBooks; i++) { if (users[vindex].getRatingAt(i) > 0) { if (count == 0) { cout << "Here are the books that you have rated:" << endl; } //if () cout << "Title : " << books[i].getTitle() << endl; cout << "Rating : " << users[vindex].getRatingAt(i) << endl; cout << "------------------------------" << endl; count++; } } if (count == 0) { cout << "You have not rated any books as of yet: " << endl; } }

void Library::printAllBooks() { if (numBooks == -1) { cout << "No books are stored" << endl; cout << endl; } else { for (int i = 0; i < numBooks; ++i) {

cout << books[i].getTitle() << " by " << books[i].getAuthor() << endl; } cout << endl; } }

int Library::getIndexId(string findName) { int i = 0; while ((i < numUsers) && (users[i].getUsername() != findName)) { if (users[i].getUsername() != findName) i++; } if (users[i].getUsername() == findName) {

return i; } else { return -1; } }

int Library::getCountReadBooks(string reader) {

int index = 0; int userBooksRead = 0; int rateValue = 0;

if ((numUsers == -1) || (numBooks == -1)) { cout << reader << " does not exist in our database" << endl;

return -1; }

index = Library::getIndexId(reader);

if (index == -1) { cout << reader << " does not exist in the database" << endl;

return -1; } else { for (int i = 0; i < numBooks; ++i) { rateValue = users[index].getRatingAt(i); if (rateValue != 0) { userBooksRead++; } } }

return userBooksRead; }

int Library::getBookIndexId(string findBook) { int i = 0;

while ((i < numBooks) && (books[i].getTitle() != findBook)) { cout << books[i].getTitle() << endl; i = i++; } if (books[i].getTitle() == findBook) { //return i + 1; return i; } else { return -1; } } double Library::calcAvgRating(string book ) { int index = 0; int i = 0; int j = 0; double bookMean = 0; int reviewCnt = 0;

if ((numUsers == 0) || (numBooks == 0)) { cout << book << " does not exists in the database" << endl; return -1; } else { index = getBookIndexId(book); if (index == -1) { cout << book << " does not exists in the database" << endl; return 0; } else { //find the number of books read/reviwed by a specific user for (int i = 0; i < numUsers; ++i) { if (users[i].getRatingAt(index) > 0) { bookMean = bookMean + users[i].getRatingAt(index); reviewCnt++; } } return bookMean / reviewCnt; } } }

Library.h

#include #include #include

using namespace std;

#ifndef Library_H //Library header #define Library_H //define the Library header

class Library {

private:

//Declare the number of books in the database (library) int numBooks = 0;

//Declare the number of users in the database (library) int numUsers = 0;

//Declare the number of books read; number is constant at 200 static const int sizeBook = 200;

//Declare the number of users; number is constant at 200 static const int sizeUser = 200;

//Declare an array of Book objects Book books[sizeBook];

//Declare an array of User objects User users[sizeUser];

public:

//The default constructor will set numBooks and Numbers to zero Library();

//Define readBooks to take in a string (the name of the file to be read) and //populates the books array. Returns the total number of books in the books array as integer

int readBooks(string bFile);

//Define readRatings to take in a string (the name of the file to be read) and //populates the users array. Returns the total number of users in the user array as integer

int readRatings(string rFile);

//The printAllBooks function prints all the stored in the books array and return nothing

void printAllBooks();

//The getCountReadBooks function will take in a string (username) and return the number //of books read by that user as an integer

int getCountReadBooks(string allbooks);

//The calAvgRating function takes a string (title of a book) and returns the average rating of the specified //book as a double

double calcAvgRating(string avgBook);

//The addUser function takes a string (username) and returns True if the username is sucessfully added to the database //otherwise return fales

bool addUser(string newUser);

//The checkOutBook function takes in two strings and an integer for the username, title of the book, //and a new rating, respectively (in this order). Returns true if the //rating is successfully updated. Otherwise, return false

bool checkOutBook(string userChkName, string titleChk, int newRate);

//The viewRatings function takes a string (username) and prints all the books //a user has provided for ratings

void viewRatings(string chkView);

//The getRecommendations function takes a string (username) and prints the first 5 book //recommendations from the most similar (other) user

void getRecommendations(string recUser);

int Split(string chkList, char delimiter, string chkWords[], int chkMax);

int getIndexId(string name);

int getBookIndexId(string book); }; //End of class

#endif //Library