ChattingApplication.cpp

#include <bits/stdc++.h>
using namespace std;

void initialPage();
void bodyPage(string);
map<string, string> user;

class friends
{
    vector<string> friend_list;
    struct chat
    {
        int message_id;
        string sender, receiver;
        char mess[50][100];
        int num_of_message = 0;
    };

public:
    map<string, chat> messages;
    void AddFriend(string);
    void UnFriend(string);
    void DisplayFriend(string);
    void ChatOn(string, string, char *);
    void Inbox(string);
};

void friends::ChatOn(string userName, string reciepient, char *message)
{
    int flag = 0;
    messages[reciepient].sender = userName;
    messages[reciepient].receiver = reciepient;
    map<string, string>::iterator iuser;
    for (iuser = user.begin(); iuser != user.end(); iuser++)
    {
        if (iuser->first == reciepient)
        {
            flag++;
        }
    }
    if (!flag)
    {
        cout << "\nSorry!! User Not found\a\a\n";
        bodyPage(userName);
    }

    int i;
    char currentUserName[20];
    for (i = 0; userName[i] != '\0'; i++)
    {

        currentUserName[i] = userName[i];
    }
    strcpy(messages[reciepient].mess[messages[reciepient].num_of_message], currentUserName);
    strcat(messages[reciepient].mess[messages[reciepient].num_of_message], ":  ");
    strcat(messages[reciepient].mess[messages[reciepient].num_of_message], message);

    messages[reciepient].num_of_message++;
}

void friends::Inbox(string userName)
{
    cout << "\nWelcome " << userName << " to your Inbox\n\n";
    cout << "Messages in your Inbox:\n\n";
    for (int i = 0; i <= messages[userName].num_of_message; i++)
    {
        puts(messages[userName].mess[i]);
        cout << endl
             << endl;
    }
}

void friends::AddFriend(string userName)
{
    vector<string>::iterator iv;
    map<string, string>::iterator iuser;
    int uflag = 0, flag = 0, flag3 = 0;
    string addname;
    cout << "\nEnter your Friend name you want to search" << endl;
    cin >> addname;
    cout << "\nPlease wait! checking for  " << addname << "......\n";
    // waiting time for new mwssage
    for (int i = 0; i < 99999910;)
    {
        i++;
    }
    for (iuser = user.begin(); iuser != user.end(); iuser++)
    {
        for (iv = friend_list.begin(); iv != friend_list.end(); iv++)
        {
            if (*iv == addname)
                flag3++;
        }
        if (addname == userName)
        {

            uflag++;
            break;
        }

        else if (iuser->first == addname)
            flag++;
    }
    // error for trying to add yourself as your friend
    if (uflag == 1 && flag == 0 && flag3 == 0)
        cout << "\nSorry! Can't add yourself to your friend list\n";
    if (flag == 1 && uflag == 0 && flag3 == 0)
    {
        cout << "\nFound\t" << addname << endl;
        friend_list.push_back(addname);
        cout << "\nCongratulations! " << addname << " has been added to your friend list\n"
             << endl;
    }
    else if (uflag == 0 && flag == 0)
    {
        cout << "\nSorry!! this username does not exist\n";
    }
    else if (flag3)
    {
        cout << "\n"
             << addname << " already exists in your friend list\n";
    }
}

void friends::DisplayFriend(string userName)
{
    int c = 0;
    vector<string>::iterator i;
    i = friend_list.begin();
    cout << "\nWelcome " << userName << " Your Friends are:" << endl;
    for (; i != friend_list.end(); i++)
    {
        cout << "\n"
             << *i << endl;
        c++;
    }
    cout << endl
         << endl
         << "\nTotal friends: " << c;
}

void friends::UnFriend(string userName)
{
    if (friend_list.empty())
    {
        cout << "\nFriend list empty..!!\a\n";
    }
    else
    {
        int c = 0, pos = 0, flag = 0;
        string name;
        cout << "\nenter the friend name you want to UnFriend \n";
        cin >> name;
        vector<string>::iterator i;
        i = friend_list.begin();

        for (; i != friend_list.end(); i++)
        {
            c++;
            if (*i == name)
            {
                flag++;
                pos = c - 1;
                break;
            }
        }

        i = friend_list.begin();
        if (pos || flag)
        {
            cout << "\n Removing " << name << " from your friend list..\a\a\a\a\n";
            friend_list.erase(i + pos);
            cout << name << " has been successfully removed from your friend list\n";
        }
        if (flag == 0 && pos == 0)
        {
            cout << "\nNo such friend exists in your friend list\n";
        }
    }
}

void initialPage()
{
    int flag = 0, choice;

    cout << "\n\t\t\tWELCOME TO THE Akash-MESSENGER\n";

    while (1)
    {

        cout << "\nPlease Enter your choice\n  1-Sign_up\n  2-Sign_in\n  3-Exit \n \n"
             << endl;
        cin >> choice;

        switch (choice)
        {
        case 1:
        {

            string username, pwd;
            cout << "\nchoose a username\n";
            cin >> username;
            cout << "\nchoose a password\n";
            cin >> pwd;
            map<string, string>::iterator iuser;
            if (user.empty())
            {
                user[username] = pwd;
            }
            else
            {

                for (iuser = user.begin(); iuser != user.end(); iuser++)
                {
                    if (iuser->first == username)
                    {
                        cout << "\nSorry! username not available..please try with some other name\n";
                        break;
                    }
                    else
                    {
                        user[username] = pwd;
                        break;
                    }
                }
            }
            break;
        }

        case 2:
        {

            string lusername, lpwd;
            cout << "\nenter your username\n";
            cin >> lusername;
            cout << "\nenter your password\n";
            cin >> lpwd;
            map<string, string>::iterator iuser;
            for (iuser = user.begin(); iuser != user.end(); iuser++)
            {
                if (iuser->first == lusername && iuser->second == lpwd)
                {
                    cout << "\nWELCOME " << lusername << "!!  You have successfully logged in \n";

                    flag = 1;
                    bodyPage(lusername);
                    break;
                }
            }

            if (flag == 0)
            {
                cout << "\nusername or password incorrect\n\t!!Please try again\n";
                break;
            }

            break;
        }

        case 3:
        {

            cout << "\ndisplay\n";
            map<string, string>::iterator iuser;
            cout << "\nall users\n";
            for (iuser = user.begin(); iuser != user.end(); iuser++)
            {
                cout << iuser->first << "\t" << iuser->second;
            }
            break;
        }
        }
        if (flag == 1)
        {
            break;
        }
    }
}

map<string, friends> f;
void bodyPage(string userName)
{

    int choice2, choice3;
main_menu:
    cout << endl
         << endl
         << endl
         << endl
         << endl
         << endl
         << endl
         << endl
         << endl
         << endl
         << endl
         << endl
         << endl;
    cout << "\t\t\t     WELCOME    " << userName << endl
         << endl;

    cout << "\n\t    ***********Choose from following menu**********\n";
    cout << "\n1-Inbox\n2-Chat\n3-Friend_list\n4-Add friend\n5-UnFriend\n6-Group chat\n7-Log out\n";
    cin >> choice2;
    switch (choice2)
    {
    case 1:
    {

        f[userName].Inbox(userName);
        cout << "\npress any number except '0' to go back to main menu\n";
        cin >> choice3;
        if (choice3)
            goto main_menu;

        break;
    }
    case 2:
    {
        string reciepient;
        cout << "\nPlease enter the reciepient's name:\n";
        cin >> reciepient;
        char message[100];
        cout << "\nPlease Type Your message :" << endl;
        cin.ignore();
        cin.getline(message, 100);
        f[reciepient].ChatOn(userName, reciepient, message);
        cout << "\nYour message has been sent\n";
        cout << "\npress any number except '0' to go back to main menu\n";
        cin >> choice3;
        if (choice3)
            goto main_menu;

        break;
    }
    case 3:
    {
        f[userName].DisplayFriend(userName);
        cout << "\npress any number except '0' to go back to main menu\n";
        cin >> choice3;
        if (choice3)
            goto main_menu;
        break;
    }
    case 4:
    {
        f[userName].AddFriend(userName);
        cout << "\npress any number except '0' to go back to main menu\n";
        cin >> choice3;
        if (choice3)
            goto main_menu;
        break;
    }
    case 5:
    {
        f[userName].UnFriend(userName);
        cout << "\npress any number except '0' to go back to main menu\n";
        cin >> choice3;
        if (choice3)
            goto main_menu;
        break;
    }

    case 6:
    {

        char ch;

        vector<string> rec;
        map<string, string>::iterator iuser;
        vector<string>::iterator irec;
    group:
        int flag = 0;
        string reciepient;
        cout << "Enter reciepient";
        cin >> reciepient;

        for (iuser = user.begin(); iuser != user.end(); iuser++)
        {
            if (iuser->first == reciepient)
            {
                flag++;
            }
        }
        if (!flag)
        {
            cout << "\nSorry!! No such user exist\a\a\n";
            goto group;
        }

        rec.push_back(reciepient);
        cout << "Do you want to add more reciepients (y/n)?\n";
        cin >> ch;

        if (ch == 'y')
            goto group;

        else if (ch == 'n')
        {
            char message[100];
            cout << "\nPlease Type Your message :" << endl;
            cin.ignore();
            cin.getline(message, 100);
            for (irec = rec.begin(); irec != rec.end(); irec++)
            {
                f[*irec].ChatOn(userName, *irec, message);
            }
        }
        cout << "\nYour message has been sent\n";
        cout << "\npress any number except '0' to go back to main menu\n";
        cin >> choice3;
        if (choice3)
            goto main_menu;
        break;
    }

    case 7:
    {
        system("cls");
        cout << "\nyou have been successfully logged out\n";

        initialPage();

        break;
    }
    }
}

int main()
{
    initialPage();
    return 0;
}