window_issuebook.cpp

#include "window_issuebook.h"
#include "ui_window_issuebook.h"
#include "window_addbook.h"
#include "ui_window_addbook.h"
#include <QFile>
#include <QTextStream>
#include <QDebug>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
#include <bits/stdc++.h>
#include <QDate>
#include <QString>
#include <QMessageBox>
#include<QDir>
//==============================================================================================
Window_IssueBook::Window_IssueBook(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Window_IssueBook)
{
    ui->setupUi(this);
    ui->lineEdit_BookId->setFocus();
    ui->pushButton_IssueBook->hide();
}

Window_IssueBook::~Window_IssueBook()
{
    delete ui;
}

void Window_IssueBook::on_pushButton_search_clicked()
{
    QDir AddedBook;
    AddedBook.cd("..");
    AddedBook.cd("Login_MY_FINAL");
    AddedBook.cd("RowData");
    QFile  AddedBooksFile(AddedBook.path()+"/AddedBooks.json");
    QString BookId = ui->lineEdit_BookId->text();
   AddedBooksFile.open(QIODevice::ReadWrite | QIODevice::Text);
   QByteArray B = AddedBooksFile.readAll();
   QJsonDocument D = QJsonDocument::fromJson(B);
   QJsonObject Obj = D.object();

   AddedBooksFile.close();
   if(Obj.find(BookId)==Obj.end()){
        QMessageBox::warning(this," ","Book not found!");
        return;
   }
   ui->pushButton_search->hide();
   ui->pushButton_IssueBook->show();
//   QJsonObject empty ={};
   QJsonValueRef found_ref = Obj.find(BookId).value();
   QJsonObject found_obj= found_ref.toObject();
   QString BookName= found_obj["name"].toString();
   QString subject= found_obj["subject"].toString();
   QString date_added= found_obj["date_added"].toString();
   QString status= found_obj["status"].toString();
   QString author= found_obj["author"].toString();


}

void Window_IssueBook::on_pushButton_IssueBook_clicked()
{

    QString BookId = ui->lineEdit_BookId->text();
    QDir AddedBook;
    AddedBook.cd("..");
    AddedBook.cd("Login_MY_FINAL");
    AddedBook.cd("RowData");
    QFile  AddedBooksFile(AddedBook.path()+"/AddedBooks.json");
   AddedBooksFile.open(QIODevice::ReadWrite | QIODevice::Text);
   QByteArray B = AddedBooksFile.readAll();
   QJsonDocument D = QJsonDocument::fromJson(B);
   QJsonObject Obj = D.object();
   QJsonValueRef found_ref = Obj.find(BookId).value();
   QJsonObject found_obj= found_ref.toObject();
   QString BookName= found_obj["name"].toString();
   QString subject= found_obj["subject"].toString();

   QString status= found_obj["status"].toString();
   QString author= found_obj["author"].toString();
   QString date_added= found_obj["date_added"].toString();
   QJsonObject EditedBook = {   {"id", BookId},
                                  {"status", "issued"},
                                  {"date_added", date_added},
                                  {"name", BookName},
                                  {"author", author},
                                  {"subject", subject}
};
   AddedBooksFile.close();
    Obj.remove(BookId);
   Obj[BookId]=EditedBook;
   QJsonObject empty ={};
   QDir account;
       account.cd("..");
       account.cd("Login_MY_FINAL");
       account.cd("RowData");
       QFile AccountsFile (account.path()+"/accounts.json");
   AccountsFile.open(QIODevice::ReadWrite);

   QJsonDocument jsonDocAcc = QJsonDocument::fromJson( AccountsFile.readAll() );

   QJsonObject Accounts_Obj=jsonDocAcc.object();
   AccountsFile.close();
   foreach(QJsonValue x,Accounts_Obj){

       QJsonObject RentedBook=(x.toObject())["RentedBooks"].toObject();

       if(RentedBook.find(BookId)!=RentedBook.end()){
           QString MemberName= (x.toObject())["Name"].toString();

           QString Username= (x.toObject())["Username"].toString();
           QString date_added_account= (x.toObject())["date_added"].toString();
           QString ExpireDate= (x.toObject())["ExpireDate"].toString();
           int AccountType= (x.toObject())["AccountType"].toInt();
           QString Password=(x.toObject())["Password"].toString();
           QString MemberId = (x.toObject()["id"]).toString();


           RentedBook.remove(BookId);
           QJsonObject newAccount = { {"Name", MemberName},
                                          {"Username", Username},
                                      {"id", MemberId},
                                          {"date_added", date_added_account},
                                  {"ExpireDate", ExpireDate},
                                          {"AccountType", AccountType},
                                          {"Password", Password},
                                      {"RentedBooks",RentedBook}
                                        };

           Accounts_Obj.remove(MemberId);
          Accounts_Obj[MemberId]=newAccount;

           QMessageBox::information(this, "", "Book was rented,also removed from the account.");
           QJsonDocument FinalAccounts(Accounts_Obj);
           if( !AccountsFile.open( QIODevice::WriteOnly ) ) //write json content to file.
           {
               qDebug()<<"error opening file for write.\n";
           }

           AccountsFile.write(FinalAccounts.toJson());
           AccountsFile.close();
           break;
       }

   }


   QJsonDocument doc( Obj );

   if( !AddedBooksFile.open( QIODevice::WriteOnly ) ) //write json content to file.
   {
       qDebug()<<"error opening file for write.\n";
   }

   AddedBooksFile.write(doc.toJson());
   AddedBooksFile.close();

       QMessageBox::information(this," ","Book issued successfully!");



}