CsvReader.h

Go to the documentation of this file.

/****
 * Sming Framework Project - Open Source framework for high efficiency native ESP8266 development.
 * Created 2015 by Skurydin Alexey
 * http://github.com/SmingHub/Sming
 * All files of the Sming Core are provided under the LGPL v3 license.
 *
 * CsvReader.h
 *
 * @author: 2021 - Mikee47 <mike@sillyhouse.net>
 *
 ****/
 
#pragma once
 
#include "Stream/DataSourceStream.h"
#include "CStringArray.h"
#include <memory>
 
class CsvReader
{
public:
    CsvReader(IDataSourceStream* source, char fieldSeparator = ',', const CStringArray& headings = nullptr,
              size_t maxLineLength = 2048)
        : source(source), fieldSeparator(fieldSeparator), userHeadingsProvided(headings), maxLineLength(maxLineLength),
          headings(headings)
    {
        reset();
    }
 
    void reset();
 
    bool next()
    {
        return readRow();
    }
 
    unsigned count() const
    {
        return headings.count();
    }
 
    const char* getValue(unsigned index)
    {
        return row[index];
    }
 
    const char* getValue(const char* name)
    {
        return getValue(getColumn(name));
    }
 
    int getColumn(const char* name)
    {
        return headings.indexOf(name);
    }
 
    explicit operator bool() const
    {
        return bool(row);
    }
 
    const CStringArray& getHeadings() const
    {
        return headings;
    }
 
    const CStringArray& getRow() const
    {
        return row;
    }
 
private:
    bool readRow();
 
    std::unique_ptr<IDataSourceStream> source;
    char fieldSeparator;
    bool userHeadingsProvided;
    size_t maxLineLength;
    CStringArray headings;
    CStringArray row;
};