Table.h

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/****
 * Table.h
 *
 * Copyright 2024 mikee47 <mike@sillyhouse.net>
 *
 * This file is part of the CsvReader Library
 *
 * This library is free software: you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation, version 3 or later.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this library.
 * If not, see <https://www.gnu.org/licenses/>.
 *
 ****/
 
#pragma once
 
#include <CSV/Reader.h>
 
namespace CSV
{
struct Record {
    CStringArray row;
 
    Record()
    {
    }
 
    Record(const CStringArray& row) : row(row)
    {
    }
 
    explicit operator bool() const
    {
        return row;
    }
 
    const char* operator[](unsigned index) const
    {
        return row[index];
    }
};
 
template <class Record = Record> class Table : public Reader
{
public:
    class Iterator
    {
    public:
        static constexpr unsigned end{UINT32_MAX};
 
        Iterator(Reader* reader, unsigned index) : reader(reader), index(index)
        {
        }
 
        Iterator& operator++()
        {
            if(reader && reader->next()) {
                ++index;
            } else {
                index = end;
            }
            return *this;
        }
 
        Record operator*() const
        {
            return (reader && index != end) ? Record(reader->getRow()) : Record();
        }
 
        bool operator==(const Iterator& other) const
        {
            return reader == other.reader && index == other.index;
        }
 
        bool operator!=(const Iterator& other) const
        {
            return !operator==(other);
        }
 
    private:
        Reader* reader;
        unsigned index;
    };
 
    using Reader::Reader;
 
    Record next()
    {
        return Reader::next() ? getRow() : Record();
    }
 
    Iterator begin()
    {
        reset();
        return Table::next() ? Iterator(this, 0) : end();
    }
 
    Iterator end()
    {
        return Iterator(this, Iterator::end);
    }
};
 
} // namespace CSV