publication in OPDS2 feed might be an OPDSPublication or an R2Publication

[panaC]

https://github.com/readium/r2-opds-js/blob/c262484a98040c9ea901131701ce0265f39adede/src/opds/opds2/opds2.ts#L57

https://drafts.opds.io/opds-2.0#12-publications

Publications must either be:

a Readium Web Publication with no restrictions in terms of access (no payment, no credentials required, no limitations whatsoever)
or an OPDS Publication

How to add it into the serializer @danielweck ?

I think we need to add a converter before the OPDSPublicaition serialization.

For example :
this R2Publication https://r2-streamer-js-aghvbovdia-ey.a.run.app/pub/aHR0cHM6Ly9uZ25peC1zZXJ2ZXItbmNuZGFkd3M0cS1leS5hLnJ1bi5hcHAvcHVibGljL0FjY2Vzc2libGVfRVBVQl8zLmVwdWI=/manifest.json

become

{
    "metadata": {
        "@type": "http://schema.org/Book",
        "title": "Accessible EPUB 3",
        "identifier": "urn:isbn:9781449328030",
        "author": "Matt Garrish",
        "publisher": "Tools of Change",
        "language": "en",
        "modified": "2020-11-19T08:17:07.811Z",
        "description": "<p>With the introduction of EPUB 3, publishers now have the means to create a single rich data source for audiences of all reading abilities. Through practical tips and examples, <i>Accessible EPUB 3</i> takes you inside the EPUB 3 format and explores how you can enrich and enhance content for all readers. Author Matt Garrish demystifies the process of making content easier to access, demonstrating how accessible practices are intertwined with standard content best practices.</p>",
        "rights": "Copyright © 2012 ",
        "subject": "COMPUTERS / Electronic Publishing"
    },
    "links": [
        {
            "type": "application/webpub+json",
            "rel": "http://opds-spec.org/acquisition/open-access",
            "href": "https://r2-streamer-js-aghvbovdia-ey.a.run.app/pub/aHR0cHM6Ly9uZ25peC1zZXJ2ZXItbmNuZGFkd3M0cS1leS5hLnJ1bi5hcHAvcHVibGljL0FjY2Vzc2libGVfRVBVQl8zLmVwdWI=/manifest.json"
        }
    ],
    "images": [
        {
            "type": "image/jpeg",
            "height": 1000,
            "width": 761,
            "href": "https://r2-streamer-js-aghvbovdia-ey.a.run.app/pub/aHR0cHM6Ly9uZ25peC1zZXJ2ZXItbmNuZGFkd3M0cS1leS5hLnJ1bi5hcHAvcHVibGljL0FjY2Vzc2libGVfRVBVQl8zLmVwdWI=/OEBPS/orm_front_cover.jpg"
        }
    ]
}

same metadata, just extract cover and add webpub acquisition OPDSLink

[panaC]

opds-community/drafts#39