remwharead::Export::RSS Class Reference

Export as RSS feed. More...

#include <remwharead/export/rss.hpp>

Inheritance diagram for remwharead::Export::RSS:

Public Member Functions
void	print () const override
	Print output to std::ostream. More...
	ExportBase (const list< Database::entry > &entries, ostream &out=cout)
	Export list of Database::entry. More...
	ExportBase (const ExportBase &)=delete
	ExportBase (ExportBase &&)=delete

Additional Inherited Members
Protected Member Functions inherited from remwharead::Export::ExportBase
list< Database::entry >	sort_entries (list< Database::entry > entries) const
	Sort entries from newest to oldest and remove duplicates. More...
	ExportBase (const list< Database::entry > &entries, ostream &out=cout)
	Export list of Database::entry. More...
	ExportBase (const ExportBase &)=delete
ExportBase &	operator= (const ExportBase &)=delete
	ExportBase (ExportBase &&)=delete
ExportBase &	operator= (ExportBase &&)=delete
Protected Attributes inherited from remwharead::Export::ExportBase
const list< Database::entry >	_entries
ostream &	_out

Detailed Description

Export as RSS feed.

Since

0.8.0

Member Function Documentation

ExportBase()

remwharead::Export::ExportBase::ExportBase

explicit

Export list of Database::entry.

Parameters

entries	List of Database::entry to export.
out	Output stream.

    : _entries(sort_entries(entries))
    , _out(out)
{}

print()

void remwharead::Export::RSS::print ( ) const

overridevirtual

Print output to std::ostream.

Implements remwharead::Export::ExportBase.

{
    try
    {
        XMLWriter writer(_out, XMLWriter::CANONICAL);
        AttributesImpl attrs_rss;
        AttributesImpl attrs_guid;
        constexpr char timefmt_rfc822[] = "%w, %d %b %Y %H:%M:%S %Z";

        attrs_rss.addAttribute("", "", "version", "", "2.0");
        attrs_rss.addAttribute("", "", "xmlns:atom", "",
                               "http://www.w3.org/2005/Atom");
        attrs_guid.addAttribute("", "", "isPermaLink", "", "false");

        writer.startDocument();
        writer.startElement("", "", "rss", attrs_rss);
        writer.startElement("", "", "channel");

        writer.startElement("", "", "title");
        writer.characters("Visited things");
        writer.endElement("", "", "title");

        writer.startElement("", "", "link");
        writer.endElement("", "", "link");

        writer.startElement("", "", "description");
        writer.characters("Export from remwharead.");
        writer.endElement("", "", "description");

        writer.startElement("", "", "generator");
        writer.characters(string("remwharead ") + global::version);
        writer.endElement("", "", "generator");

        const string now = DateTimeFormatter::format(DateTime(),
                                                     timefmt_rfc822);
        writer.startElement("", "", "lastBuildDate");
        writer.characters(now);
        writer.endElement("", "", "lastBuildDate");

        for (const Database::entry &entry : _entries)
        {
            writer.startElement("", "", "item");

            writer.startElement("", "", "title");
            if (!entry.title.empty())
            {
                writer.characters(entry.title);
            }
            else
            {
                constexpr std::uint8_t maxlen = 100;
                string title = entry.description.substr(0, maxlen);
                if (entry.description.length() > maxlen)
                {
                    title += " […]";
                }
                writer.characters(title);
            }
            writer.endElement("", "", "title");

            writer.startElement("", "", "link");
            writer.characters(entry.uri);
            writer.endElement("", "", "link");

            writer.startElement("", "", "guid", attrs_guid);
            writer.characters(entry.uri + " at "
                              + timepoint_to_string(entry.datetime));
            writer.endElement("", "", "guid");

            const time_t time = system_clock::to_time_t(entry.datetime);
            const string time_visited = DateTimeFormatter::format(
                Timestamp::fromEpochTime(time), timefmt_rfc822);
            writer.startElement("", "", "pubDate");
            writer.characters(time_visited);
            writer.endElement("", "", "pubDate");

            string description = entry.description;
            if (!description.empty())
            {
                description = "<p>" + description.append("</p>");
            }
            if (!entry.tags.empty())
            {
                description += "<p><strong>Tags:</strong> ";
                for (const string &tag : entry.tags)
                {
                    description += tag;
                    if (tag != *(entry.tags.rbegin()))
                    {
                        description += ", ";
                    }
                }
                description += "</p>";
            }
            if (!entry.archive_uri.empty())
            {
                description += "<p><strong>Archived version:</strong> "
                    "<a href=\"" + entry.archive_uri + "\">"
                    + entry.archive_uri + "</a></p>";
            }
            writer.startElement("", "", "description");
            writer.characters(description);
            writer.endElement("", "", "description");

            writer.endElement("", "", "item");
        }

        writer.endElement("", "", "channel");
        writer.endElement("", "", "rss");
        writer.endDocument();
        _out << endl;
    }
    catch (std::exception &e)
    {
        cerr << "Error in " << __func__ << ": " << e.what() << endl;
    }
}

---

The documentation for this class was generated from the following files:

• include/export/rss.hpp
• src/lib/export/rss.cpp