// g++ `taglib-config --cflags --libs` taglib-set-picture.cpp -o taglib-set-picture

/* Copyright (C) 2004 Scott Wheeler <wheeler@kde.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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 AUTHOR ``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 AUTHOR 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.
 */


#include <mpegfile.h>
#include <attachedpictureframe.h>
#include <id3v2tag.h>

#include <iostream>

/*!
 * Just a hacked up convenience class to read all of the data from an image file.
 * This is probably *NOT* the way that this should be done in real code.  But still
 * something will be needed to identify the mimetype and to read the data.
 */

class ImageFile : public TagLib::File
{
public:
    ImageFile(const char *file) : TagLib::File(file)
    {

    }

    TagLib::String mimeType() const
    {
        TagLib::String fileName = name();

        if(fileName.substr(fileName.size() - 4, 4).upper() == ".PNG")
            return "image/png";
        else if(fileName.substr(fileName.size() - 4, 4).upper() == ".JPG" ||
                fileName.substr(fileName.size() - 5, 5).upper() == ".JPEG")
            return "image/jpeg";
        else
            return TagLib::String::null;
    }

    TagLib::ByteVector data()
    {
        return readBlock(length());
    }

    bool isValid() const
    {
        return isOpen() && !mimeType().isNull();
    }

private:
    virtual TagLib::Tag *tag() const { return 0; }
    virtual TagLib::AudioProperties *audioProperties() const { return 0; }
    virtual bool save() { return false; }
};

int main(int argc, char *argv[])
{
    if(argc != 3) {
        std::cout << "Usage: taglib-set-picture foo.mp3 bar.png" << std::endl;
        return 1;
    }

    TagLib::MPEG::File audioFile(argv[1]);
    ImageFile imageFile(argv[2]);

    if(!audioFile.isValid()) {
        std::cout << '"' << audioFile.name() << "\" is not valid." << std::endl;
        return 2;
    }
    if(!imageFile.isValid()) {
        std::cout << '"' << imageFile.name() << "\" is not valid." << std::endl;
        return 3;
    }

    TagLib::ID3v2::Tag *tag = audioFile.ID3v2Tag(true);
    TagLib::ID3v2::AttachedPictureFrame *frame = new TagLib::ID3v2::AttachedPictureFrame;

    frame->setMimeType(imageFile.mimeType());
    frame->setPicture(imageFile.data());

    tag->addFrame(frame);
    audioFile.save();

    return 0;
}