csv_writer.h

//Credit to al-eax as original author
// Created by Kaung Zaw Htet on 2019-10-27.
//
/**

Copyright (c) 2015, 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DEVCON_TICKET_CSV_WRITER_H
#define DEVCON_TICKET_CSV_WRITER_H
#include <fstream>
#include <iostream>
#include <sstream>
#include <typeinfo>

using namespace std;
class CSVWriter
{
public:
    CSVWriter(){
        this->firstRow = true;
        this->seperator = ";";
        this->columnNum = -1;
        this->valueCount = 0;
    }

    CSVWriter(int numberOfColums){
        this->firstRow = true;
        this->seperator = ";";
        this->columnNum = numberOfColums;
        this->valueCount = 0;
    }

    CSVWriter(string seperator){
        this->firstRow = true;
        this->seperator = seperator;
        this->columnNum = -1;
        this->valueCount = 0;
    }

    CSVWriter(string seperator, int numberOfColums){
        this->firstRow = true;
        this->seperator = seperator;
        this->columnNum = numberOfColums;
        this->valueCount = 0;
        cout << this->seperator << endl;
    }

    CSVWriter& add(const char *str){
        return this->add(string(str));
    }

    CSVWriter& add(char *str){
        return this->add(string(str));
    }

    CSVWriter& add(string str){
        //if " character was found, escape it
        size_t position = str.find("\"",0);
        bool foundQuotationMarks = position != string::npos;
        while(position != string::npos){
            str.insert(position,"\"");
            position = str.find("\"",position + 2);
        }
        if(foundQuotationMarks){
            str = "\"" + str + "\"";
        }else if(str.find(this->seperator) != string::npos){
            //if seperator was found and string was not escapted before, surround string with "
            str = "\"" + str + "\"";
        }
        return this->add<string>(str);
    }

    template<typename T>
    CSVWriter& add(T str){
        if(this->columnNum > -1){
            //if autoNewRow is enabled, check if we need a line break
            if(this->valueCount == this->columnNum ){
                this->newRow();
            }
        }
        if(valueCount > 0)
            this->ss << this->seperator;
        this->ss << str;
        this->valueCount++;

        return *this;
    }

    template<typename T>
    CSVWriter& operator<<(const T& t){
        return this->add(t);
    }

    void operator+=(CSVWriter &csv){
        this->ss << endl << csv;
    }

    string toString(){
        return ss.str();
    }

    friend ostream& operator<<(std::ostream& os, CSVWriter & csv){
        return os << csv.toString();
    }

    CSVWriter& newRow(){
        if(!this->firstRow || this->columnNum > -1){
            ss << endl;
        }else{
            //if the row is the first row, do not insert a new line
            this->firstRow = false;
        }
        valueCount = 0;
        return *this;
    }

    bool writeToFile(string filename){
        return writeToFile(filename,false);
    }

    bool writeToFile(string filename, bool append){
        ofstream file;
        if(append)
            file.open(filename.c_str(),ios::out | ios::app);
        else
            file.open(filename.c_str(),ios::out | ios::trunc);
        if(!file.is_open())
            return false;
        if(append)
            file << endl;
        file << this->toString();
        file.close();
        return file.good();
    }

    void enableAutoNewRow(int numberOfColumns){
        this->columnNum = numberOfColumns;
    }

    void disableAutoNewRow(){
        this->columnNum = -1;
    }
protected:
    bool firstRow;
    string seperator;
    int columnNum;
    int valueCount;
    stringstream ss;

};
#endif //DEVCON_TICKET_CSV_WRITER_H