remwharead::Export::RSS Class Reference

Export as RSS feed. More...

#include <remwharead/export/rss.hpp>

Inheritance diagram for remwharead::Export::RSS:

Public Member Functions
virtual 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...

Additional Inherited Members
Protected Member Functions inherited from remwharead::Export::ExportBase
const 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...
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, 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 + "</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>";
                }
                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;
        }
    }

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

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