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Netflix.cpp
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Netflix.cpp
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#include "Netflix.h"
Netflix::Netflix(){
users = new map<string, User*>;
movies = new map<string, Movie*>;
keywords = new map<string, Set<Movie*>*>;
actors = new map<string, Set<Movie*>*>;
movieRatings = new map<Movie*, Set<User*>*>;
}
/* constructor that initializes the data structures */
Netflix::Netflix(char* mainFileName){
users = new map<string, User*>;
movies = new map<string, Movie*>;
keywords = new map<string, Set<Movie*>*>;
actors = new map<string, Set<Movie*>*>;
movieRatings = new map<Movie*, Set<User*>*>;
loadFiles(mainFileName);
}
/* constructor that initializes the data structures and calls the load functions */
Netflix::~Netflix(){
delete users;
delete movies;
delete keywords;
delete actors;
delete movieRatings;
delete[] distance;
}
/* deletes all the dynamically allocated variables */
bool Netflix::loadFiles(const char* mainFileName){
ifstream mainFile;
mainFile.open(mainFileName);
if(mainFile.fail()){
cout << "Main file does not exist! Please enter valid filename." << endl;
return false;
}
getline(mainFile, userFileName);
getline(mainFile, movieFileName);
mainFile.close();
loadMovies(movieFileName.c_str());
loadUsers(userFileName.c_str());
distance = new double[users->size()];
/****************** creating similarity graph *******************/
similarities.resize(users->size(), vector<double>(users->size()));
//for(int i = 0; i < similarities.size())
int iCount = 0;
int jCount = 0;
for(map<string, User*>::iterator iIter = users->begin(); iIter != users->end(); iIter++){
jCount = 0;
for(map<string, User*>::iterator jIter = users->begin(); jIter != users->end(); jIter++){
similarities[iCount][jCount] = basicSimilarity(iIter->second, jIter->second);
// cout << similarities[iCount][jCount] << " |";
// cout << "similarities[" << iCount << "]" << "[" << jCount << "]" << endl;
jCount++;
}
iCount++;
}
return true;
}
/* takes in the command line argument and obtains two text file names
it returns true if successful and false if not */
bool Netflix::loadUsers(const char* userFileName){
ifstream userFile;
userFile.open(userFileName);
if(userFile.fail()){
cout << "User file does not exist! Please enter valid filename." << endl;
return false;
}
stringstream ss;
string line;
string command;
string tempID;
string tempName;
string tempCheckedOut;
Movie* checkedOut;
queue<Movie*> tempQueue;
map<Movie*, int> tempRatings;
bool hasMovie = false;
string tempAddress = "";
string tempCCNum = "";
string tempCCDate = "";
string tempCCCode = "";
double tempCharge = 0;
string chargeString = "";
string tempPassword = "";
string subLabel = "";
while(!userFile.eof()){
getline(userFile, line);
ss << line;
getline(ss, command, ' ');
if (command == "BEGIN") {
string subCommand;
string tempString;
ss >> tempString;
if(tempString == "QUEUE"){
getline(userFile, subCommand);
while(subCommand != "END QUEUE"){
subCommand = capitalize(subCommand);
try{
tempQueue.push((movies->find(subCommand))->second);
} catch(out_of_range & e){
cout << "Warning: Queued movie does not exist in movie file" << endl << endl;
}
getline(userFile, subCommand);
}
} else if (tempString == "RATINGS"){
getline(userFile, subCommand);
Movie* ratedMovie;
string ratedTitle;
string ratingString;
int rating;
while(subCommand != "END RATINGS"){
ss.ignore(10000, '\n');
ss.clear();
ss << subCommand;
getline(ss, ratingString, ' ');
getline(ss, ratedTitle);
ss.ignore(10000, '\n');
ss.clear();
ss << ratingString;
ss >> rating;
ratedTitle = capitalize(ratedTitle);
try{
ratedMovie = movies->find(ratedTitle)->second;
tempRatings.insert(pair<Movie*, int>(ratedMovie, rating));
} catch(out_of_range & e){
cout << "Warning: Rated movie does not exist in movie file" << endl << endl;
}
getline(userFile, subCommand);
}
} else {
tempID = tempString;
}
} else if (command == "NAME:") {
getline(ss, tempName);
} else if (command == "ADDRESS:") {
getline(ss, tempAddress);
} else if (command == "CREDIT") {
getline(ss, subLabel, ' ');
getline(ss, subLabel, ' ');
if(subLabel == "NUMBER:"){
getline(ss, tempCCNum);
} else if (subLabel == "DATE:"){
getline(ss, tempCCDate);
} else if (subLabel == "CODE:"){
getline(ss, tempCCCode);
}
} else if (command == "CHARGE:") {
getline(ss, chargeString);
ss.ignore(10000, '\n');
ss.clear();
if(chargeString == ""){
tempCharge = 0;
} else {
ss << chargeString;
ss >> tempCharge;
}
} else if (command == "PASSWORD:") {
getline(ss, tempPassword);
} else if (command == "MOVIE:") {
getline(ss, tempCheckedOut);
tempCheckedOut = capitalize(tempCheckedOut);
hasMovie = true;
try{
checkedOut = movies->find(tempCheckedOut)->second;
} catch(out_of_range & e){
cout << "Warning: Queued movie does not exist in movie file" << endl << endl;
}
} else if (command == "END") {
User* newUser = new User(tempID, tempName);
newUser->setAddress(tempAddress);
newUser->setCreditCardInfo(tempCCNum, tempCCDate, tempCCCode);
newUser->setUpCard(tempCCNum, tempCharge);
newUser->setPassword(tempPassword);
users->insert(pair<string, User*>(tempID, newUser));
movieQueue = newUser->movieQueue();
while(!tempQueue.empty()){
if(!tempQueue.empty()){
movieQueue->push(tempQueue.front());
tempQueue.pop();
} else {
break;
}
}
map<Movie*, int>* userRatings = newUser->getRatings();
// typename Map<Movie*, int>::Iterator iter, end;
// iter = tempRatings.begin();
// end = tempRatings.end();
for (map<Movie*, int>::iterator iter = tempRatings.begin(); iter != tempRatings.end(); ++iter) {
// for(; iter != end; ++iter){
//cout << "User: " << newUser->getName() << " movie: " << iter->first->getTitle() << " rating: " << iter->second << endl;
userRatings->insert(pair<Movie*, int>((*iter).first, (*iter).second));
movieRatings->find((*iter).first)->second->insert(newUser);
// cout << (*iter).first->getTitle() << " " << newUser->getName() << endl;
// cout << "SUCCESSFULLY ADDED A USER TO: " << iter->first->getTitle() << endl;
tempRatings.erase(tempRatings.find((*iter).first));
} // end of for loop
if(hasMovie == true){
newUser->rentMovie(checkedOut);
}
tempAddress = "";
tempCCNum = "";
tempCCDate = "";
tempCCCode = "";
tempCharge = 0;
chargeString = "";
tempPassword = "";
subLabel = "";
}
ss.ignore(10000, '\n');
ss.clear();
}
userFile.close();
return true;
}
/* reads in all the user information from a text file
it returns true if successful and false if not */
bool Netflix::loadMovies(const char* movieFileName){
ifstream movieFile;
movieFile.open(movieFileName);
queue<Movie*> tempQueue;
if(movieFile.fail()){
cout << "Movie file does not exist! Please enter valid filename." << endl;
return false;
}
stringstream ss;
string line;
string command;
string movieTitle;
string movieKeyword;
Movie* tempMovie;
string currentKey;
Set<string> keywordSet;
string currentActor;
string movieActor;
Set<string> actorSet;
double cost = 0;
string costString;
/* As long as there's more lines in the file, it
loops and stores the information in the movies map */
while(!movieFile.eof()){
getline(movieFile, line);
ss << line;
getline(ss, command, ' ');
if (command == "BEGIN") {
getline(ss, movieTitle);
Movie* newMovie = new Movie(movieTitle);
tempMovie = newMovie;
} else if (command == "KEYWORD:"){
getline(ss, movieKeyword);
tempMovie->addKeyword(movieKeyword);
if(keywords->find(movieKeyword) == keywords->end()){
Set<Movie*>* movieSet = new Set<Movie*>;
movieKeyword = capitalize(movieKeyword);
keywords->insert(pair<string, Set<Movie*>* >(movieKeyword, movieSet));
}
} else if (command == "ACTOR:"){
getline(ss, movieActor);
tempMovie->addActor(movieActor);
if(actors->find(movieActor) == actors->end()){
Set<Movie*>* movieSet = new Set<Movie*>;
movieActor = capitalize(movieActor);
actors->insert(pair<string, Set<Movie*>* >(movieActor, movieSet));
}
} else if(command == "COST:") {
getline(ss, costString);
ss.ignore(10000, '\n');
ss.clear();
if (costString == ""){
cost = 0;
} else {
ss << costString;
ss >> cost;
}
tempMovie->setCost(cost);
} else if(command == "END") {
movieTitle = capitalize(movieTitle);
bool exists = true;
try{
movies->find(movieTitle)->second;
} catch(out_of_range & e){
exists = false;
}
if(movies->find(movieTitle) == movies->end()){
movies->insert(pair<string, Movie*>(movieTitle, tempMovie));
}
Set<User*>* userSet = new Set<User*>;
movieRatings->insert(pair<Movie*, Set<User*>*>(tempMovie, userSet));
Set<Movie*>* currentSet;
keywordSet = tempMovie->getAllKeywords();
for (Set<string>::iterator iter = keywordSet.begin(); iter != keywordSet.end(); iter++){
currentKey = *iter;
currentKey = capitalize(currentKey);
currentSet = keywords->find(currentKey)->second;
currentSet->insert(tempMovie);
}
Set<Movie*>* currentSet2;
actorSet = tempMovie->getAllActors();
for (Set<string>::iterator iter = actorSet.begin(); iter != actorSet.end(); iter++){
currentActor = *iter;
currentActor = capitalize(currentActor);
currentSet2 = actors->find(currentActor)->second;
currentSet2->insert(tempMovie);
}
}
ss.ignore(10000, '\n');
ss.clear();
}
movieFile.close();
return true;
}
/* reads in all the movie information from a text file
it returns true if successful and false if not */
void Netflix::loginMenu(){
cout << "1. Log in" << endl;
cout << "2. Create new user" << endl;
cout << "3. Quit" << endl << endl;
cout << "Option: ";
}
/* prints out the login menu */
bool Netflix::login(string loginID, string password){
bool exists = false;
if(users->find(loginID) != users->end()){
User* attemptUser = users->find(loginID)->second;
if(attemptUser->getPassword() == md5(password)){
currentUser = users->find(loginID)->second;
movieQueue = currentUser->movieQueue();
exists = true;
}
}
return exists;
}
/* checks if user exists and if it does, sets current user and procedes with program
it returns true if successful and false if not */
User* Netflix::getUser(){
return currentUser;
}
bool Netflix::createUser(string newID, string fullName, string address, string ccNum, string ccDate, string ccCode, string password){
string newUserID = newID;
string newUserName = fullName;
if((users->find(newUserID) == users->end() && newUserID != "") && fullName != ""){
User* tempUser = new User(newUserID, newUserName);
tempUser->setAddress(address);
tempUser->setCreditCardInfo(ccNum, ccDate, ccCode);
tempUser->setUpCard(ccNum, 0);
tempUser->setPassword(md5(password));
users->insert(pair<string, User*>(newUserID, tempUser));
ofstream userFile;
userFile.open(userFileName.c_str(), std::ios_base::app | std::ios_base::out);
userFile << endl << "BEGIN " << newUserID << endl;
userFile << "NAME: " << newUserName << endl;
userFile << "BEGIN QUEUE" << endl;
userFile << "END QUEUE" << endl;
userFile << "BEGIN RATINGS" << endl;
userFile << "END RATINGS" << endl;
userFile << "END";
userFile.close();
//cout << "Your account has been created!" << endl << endl;
return true;
} else {
//cout << "User ID already exists, please try again." << endl << endl;
return false;
}
}
/* allows user to choose new userID that does not already exist and adds new user to data structure
it returns true if successful and false if not */
int Netflix::updateUser(string address, string ccNum, string ccDate, string ccCode, string password){
int result = 0;
if(address == "" && ccNum == "" && ccDate == "" && ccCode == "" && password == ""){
return -1;
}
if(address != ""){
currentUser->setAddress(address);
}
if((ccNum != "" && ccDate != "" && ccCode != "") && (ccNum != "" || ccDate != "" || ccCode != "")){
currentUser->setCreditCardInfo(ccNum, ccDate, ccCode);
currentUser->setUpCard(ccNum, 0);
} else if (ccNum != "" || ccDate != "" || ccCode != ""){
result = -2;
}
if(password != ""){
currentUser->setPassword(md5(password));
}
return result;
}
// void Netflix::checkedOutMovie(){
Movie* Netflix::checkedOutMovie(){
Movie* checkedOut = currentUser->currentMovie();
return checkedOut;
}
/* prints the current checked out movie and its keywords */
void Netflix::userMenu(){
cout << "1. Search for a movie by title" << endl;
cout << "2. Search for a movie by keyword" << endl;
cout << "3. Return the current movie" << endl;
cout << "4. View Queue" << endl;
cout << "5. Logout" << endl << endl;
cout << "Option: ";
}
/* prints the user menu */
queue<Movie*>* Netflix::searchTitle(string title){
string movieTitle = title;
Movie* chosenMovie;
queue<Movie*>* tempQueue = new queue<Movie*>;
//string currentKeyword;
//Set<string> keywordSet;
bool exists = true;
movieTitle = capitalize(movieTitle);
if(movies->find(movieTitle) != movies->end()){
chosenMovie = movies->find(movieTitle)->second;
// if(exists == true){
tempQueue->push(chosenMovie);
}
return tempQueue;
}
/* searches for movie by title where capitalization doesn't matter */
queue<Movie*>* Netflix::searchKeyword(string keyword){
Set<Movie*>* tempMovieSet;
Set<string> keywordSet;
Movie* tempMovie;
string chosenKeyword = keyword;
string currentKeyword;
queue<Movie*>* tempQueue = new queue<Movie*>;
stringstream ss;
chosenKeyword = capitalize(chosenKeyword);
if(keywords->find(chosenKeyword) != keywords->end()){
tempMovieSet = keywords->find(chosenKeyword)->second;
int size = 0;
size = tempMovieSet->size();
for(Set<Movie*>::iterator head = tempMovieSet->begin(); head != tempMovieSet->end(); ++head){
tempMovie = *head;
tempQueue->push(tempMovie);
}
} else {
if(movies->find(chosenKeyword) != movies->end()){
return searchTitle(chosenKeyword);
} else if (searchTitle(chosenKeyword)->empty()){
return searchActor(chosenKeyword);
}
}
return tempQueue;
}
/* searches for movies by their keywords */
queue<Movie*>* Netflix::searchActor(string actor){
Set<Movie*>* tempMovieSet;
Set<string> actorSet;
Movie* tempMovie;
string chosenActor = actor;
string currentActor;
queue<Movie*>* tempQueue = new queue<Movie*>;
stringstream ss;
chosenActor = capitalize(chosenActor);
if(actors->find(chosenActor) != actors->end()){
tempMovieSet = actors->find(chosenActor)->second;
int size = 0;
size = tempMovieSet->size();
for(Set<Movie*>::iterator head = tempMovieSet->begin(); head != tempMovieSet->end(); ++head){
tempMovie = *head;
tempQueue->push(tempMovie);
}
}
return tempQueue;
}
void Netflix::turnInMovie(){
currentUser->returnMovie();
}
/* returns the user's current checked out movie */
bool Netflix::ratingExists(){
bool exists = true;
if(currentUser->getRatings()->find(currentUser->currentMovie()) == currentUser->getRatings()->end()){
exists = false;
}
if(currentUser->currentMovie() == NULL){
return true;
} else {
return exists;
}
}
/* returns if there is a rating for the checked out movie*/
void Netflix::addRating(int num){
currentUser->getRatings()->insert(pair<Movie*, int>(currentUser->currentMovie(), num));
}
/* adds new rating to ratings Map */
void Netflix::queueMenu(){
cout << "1. Order movie" << endl;
cout << "2. Remove movie from queue" << endl;
cout << "3. Move movie to back of queue" << endl;
cout << "4. Return to user menu" << endl << endl;
cout << "Option: ";
}
/* prints out the movie queue menu */
Movie* Netflix::frontOfQueue(){
Movie* currentMovie;
currentMovie = movieQueue->front();
return currentMovie;
}
/* prints out the movie at the front of the queue */
bool Netflix::orderMovie(){
if(currentUser->currentMovie() != 0){
//cout << "Return your current movie before ordering another." << endl << endl;
return false;
} else if (!emptyQueue()){
Movie* currentMovie = movieQueue->front();
currentUser->rentMovie(currentMovie);
movieQueue->pop();
return true;
} else {
return false;
}
}
/* checks out the movie at the front of the queue */
void Netflix::removeMovie(){
// bool isEmpty = currentUser->movieQueue()->isEmpty();
if(!emptyQueue()){
movieQueue->pop();
}
}
/* removes the movie from the front of the queue */
void Netflix::requeueMovie(){
// bool isEmpty = currentUser->movieQueue()->isEmpty();
if(!emptyQueue()){
Movie* currentMovie = movieQueue->front();
movieQueue->push(currentMovie);
movieQueue->pop();
}
}
/* takes the movie from the front to the back of the queue */
void Netflix::enqueueMovie(Movie* selection){
queue<Movie*>* movies = currentUser->movieQueue();
movies->push(selection);
}
/* queues a given movie */
void Netflix::logout(){
ofstream userFile;
userFile.open(userFileName.c_str());
for (map<string, User*>::iterator userIter = users->begin(); userIter != users->end(); ++userIter){
// for(; userIter != userEnd; ++userIter){
userFile << "BEGIN " << (*userIter).second->getID() << endl;
userFile << "NAME: " << (*userIter).second->getName() << endl;
userFile << "ADDRESS: " << (*userIter).second->getAddress() << endl;
userFile << "CREDIT CARD NUMBER: " << (*userIter).second->getCCNumber() << endl;
userFile << "CREDIT CARD DATE: " << (*userIter).second->getCCDate() << endl;
userFile << "CREDIT CARD CODE: " << (*userIter).second->getCCCode() << endl;
userFile << "CHARGE: " << (*userIter).second->getCard()->second << endl;
userFile << "PASSWORD: " << (*userIter).second->getPassword() << endl;
if((*userIter).second->currentMovie()){
userFile << "MOVIE: " << (*userIter).second->currentMovie()->getTitle() << endl;
}
userFile << "BEGIN QUEUE" << endl;
(*userIter).second->movieQueue();
queue<Movie*>* userMovies = (*userIter).second->movieQueue();
while(!userMovies->empty()){
userFile << userMovies->front()->getTitle() << endl;
userMovies->pop();
}
userFile << "END QUEUE" << endl;
userFile << "BEGIN RATINGS" << endl;
map<Movie*, int>* tempRatings = (*userIter).second->getRatings();
for (map<Movie*, int>::iterator iter = tempRatings->begin(); iter != tempRatings->end(); ++iter){
// for(; iter != end; ++iter){
userFile << (*iter).second << " " << (*iter).first->getTitle() << endl;
} // end of for loop
userFile << "END RATINGS" << endl;
userFile << "END" << endl;
} // end of for loop
// somehow return the user to login menu
}
/* writes all of the data back into the user file and goes back to the login menu */
string Netflix::capitalize(string anyString){
for(int i = 0; i < anyString.size(); i++){
anyString[i] = toupper(anyString[i]);
}
return anyString;
}
/* returns an uppercase version of the provided string */
bool Netflix::emptyQueue(){
return movieQueue->empty();
}
double Netflix::basicSimilarity(User* first, User* second){
map<Movie*, int>* firstMap = first->getRatings();
map<Movie*, int>* secondMap = second->getRatings();
Set<Movie*> firstSet;
Set<Movie*> secondSet;
Set<Movie*> intersection;
for(map<Movie*, int>::iterator iter = firstMap->begin(); iter != firstMap->end(); ++iter){
firstSet.insert((*iter).first);
}
for(map<Movie*, int>::iterator iter = secondMap->begin(); iter != secondMap->end(); ++iter){
secondSet.insert((*iter).first);
}
bool isEmpty = false;
if(firstSet.empty() || secondSet.empty()){
isEmpty = true;
} else {
intersection = firstSet.setIntersection(secondSet);
}
double sum = 0;
int count = 0;
double similarity = 0;
if(isEmpty){
similarity = 0;
} else {
int a = 0; //first user's ratings
int b = 0; //second user's ratings
//iterate over movies they have both rated
for(Set<Movie*>::iterator iter = intersection.begin(); iter != intersection.end(); iter++){
a = firstMap->find(*iter)->second;
b = secondMap->find(*iter)->second;
sum = sum + (double)(a - b)/4;
count++;
}
//cout << "*******************************" << endl;
similarity = sum/count;
if(similarity < 0){
similarity = similarity * -1;
}
}
return similarity;
}
/* calculates the basic similarity between two users */
void Netflix::dijkstra(int src){
int numOfVertices = users->size();
double predecessor[numOfVertices];
bool mark[numOfVertices];
int source = src;
for(int i = 0; i < numOfVertices; i++) {
mark[i] = false;
predecessor[i] = -1;
distance[i] = 99999;
}
distance[src] = 0;
double minDistance = 99999;
int closestUnmarkedNode;
int count = 0;
while(count < numOfVertices) {
closestUnmarkedNode = getClosestNode(numOfVertices, mark, distance);
mark[closestUnmarkedNode] = true;
for(int i = 0; i < numOfVertices; i++) {
if((!mark[i]) && (similarities[closestUnmarkedNode][i] > 0) ) {
if(distance[i] > (distance[closestUnmarkedNode] + similarities[closestUnmarkedNode][i])) {
distance[i] = (distance[closestUnmarkedNode] + similarities[closestUnmarkedNode][i]);
predecessor[i] = closestUnmarkedNode;
}
}
}
count++;
}
}
int Netflix::getClosestNode(int numOfVertices, bool mark[], double distance[]){
int minDistance = 99999;
int closestUnmarkedNode;
for(int i = 0; i < numOfVertices; i++) {
if((!mark[i]) && ( minDistance >= distance[i])) {
minDistance = distance[i];
closestUnmarkedNode = i;
}
}
return closestUnmarkedNode;
}
double Netflix::interest(Movie* movie){
double interestingness = 0;
double R = 0;