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#ifndef NEWSBOAT_CACHE_H_
#define NEWSBOAT_CACHE_H_
#include <memory>
#include <mutex>
#include <sqlite3.h>
#include <unordered_set>
#include "configcontainer.h"
namespace newsboat {
class RssFeed;
class RssIgnores;
class RssItem;
struct SchemaVersion {
unsigned int major, minor;
friend bool operator<(const SchemaVersion& l, const SchemaVersion& r)
{
return std::tie(l.major, l.minor) < std::tie(r.major, r.minor);
}
friend bool operator>(const SchemaVersion& l, const SchemaVersion& r)
{
return r < l;
}
friend bool operator<=(const SchemaVersion& l, const SchemaVersion& r)
{
return !(l > r);
}
friend bool operator>=(const SchemaVersion& l, const SchemaVersion& r)
{
return !(l < r);
}
};
const SchemaVersion unknown_version = {0, 0};
using schema_patches = std::map<SchemaVersion, std::vector<std::string>>;
class Cache {
public:
Cache(const std::string& cachefile, ConfigContainer* c);
~Cache();
void externalize_rssfeed(std::shared_ptr<RssFeed> feed,
bool reset_unread);
std::shared_ptr<RssFeed> internalize_rssfeed(std::string rssurl,
RssIgnores* ign);
void update_rssitem_unread_and_enqueued(std::shared_ptr<RssItem> item,
const std::string& feedurl);
void update_rssitem_unread_and_enqueued(RssItem* item,
const std::string& feedurl);
/// If requested, removes unreachable data stored in cache.
/// Returns a list of unreachable feeds.
std::vector<std::string> cleanup_cache(std::vector<std::shared_ptr<RssFeed>> feeds,
bool always_clean = false);
void do_vacuum();
std::vector<std::shared_ptr<RssItem>> search_for_items(
const std::string& querystr,
const std::string& feedurl,
RssIgnores& ign);
std::unordered_set<std::string> search_in_items(
const std::string& querystr,
const std::unordered_set<std::string>& guids);
void mark_all_read(const std::string& feedurl = "");
void mark_all_read(std::shared_ptr<RssFeed> feed);
void update_rssitem_flags(RssItem* item);
void fetch_lastmodified(const std::string& uri,
time_t& t,
std::string& etag);
void update_lastmodified(const std::string& uri,
time_t t,
const std::string& etag);
void mark_item_deleted(const std::string& guid, bool b);
void remove_old_deleted_items(RssFeed* feed);
void mark_items_read_by_guid(const std::vector<std::string>& guids);
std::vector<std::string> get_read_item_guids();
void fetch_descriptions(RssFeed* feed);
std::string fetch_description(const RssItem& item);
private:
SchemaVersion get_schema_version();
void populate_tables();
void set_pragmas();
void delete_item_unlocked(const std::shared_ptr<RssItem>& item);
void clean_old_articles();
void update_rssitem_unlocked(std::shared_ptr<RssItem> item,
const std::string& feedurl,
bool reset_unread);
std::string prepare_query(const std::string& format);
template<typename... Args>
std::string prepare_query(const std::string& format,
const std::string& arg,
Args... args);
template<typename T, typename... Args>
std::string prepare_query(const std::string& format, const T& arg,
Args... args);
void run_sql(const std::string& query,
int (*callback)(void*, int, char**, char**) = nullptr,
void* callback_argument = nullptr);
void run_sql_nothrow(const std::string& query,
int (*callback)(void*, int, char**, char**) = nullptr,
void* callback_argument = nullptr);
void run_sql_impl(const std::string& query,
int (*callback)(void*, int, char**, char**),
void* callback_argument,
bool do_throw);
sqlite3* db;
ConfigContainer* cfg;
std::recursive_mutex mtx;
};
} // namespace newsboat
#endif /* NEWSBOAT_CACHE_H_ */
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