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#ifndef NEWSBOAT_URLREADER_H_
#define NEWSBOAT_URLREADER_H_
#include <map>
#include <set>
#include <string>
#include <vector>
#include "utils.h"
#include "3rd-party/optional.hpp"
namespace newsboat {
/// \brief Base class for classes that supply Newsboat with feed URLs.
class UrlReader {
public:
UrlReader() = default;
virtual ~UrlReader() = default;
/// \brief Re-read the input file.
///
/// \note This overwrites the contents of `urls`, `tags`, and `alltags`, so
/// make sure to save your modifications with `write_config()`.
virtual nonstd::optional<utils::ReadTextFileError> reload() = 0;
/// \brief User-visible description of where URLs come from.
///
/// This can be a path (e.g. ~/.newsboat/urls), a URL (e.g. the value of
/// `opml-url` setting), or a name of the remote API in use (e.g. "Tiny
/// Tiny RSS").
virtual std::string get_source() = 0;
/// \brief A list of feed URLs.
std::vector<std::string>& get_urls();
/// \brief Tags of feed that has url `url`.
std::vector<std::string>& get_tags(const std::string& url);
/// \brief List of all extant tags.
std::vector<std::string> get_alltags();
protected:
std::vector<std::string> urls;
std::map<std::string, std::vector<std::string>> tags;
std::set<std::string> alltags;
};
} // namespace newsboat
#endif /* NEWSBOAT_URLREADER_H_ */
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