/** finds tags that have been added or removed or updated */
void update_tags( const comment_object& c )const {
try {
auto hot = calculate_hot(c);
comment_metadata meta;
if( c.json_metadata.size() ){
meta = fc::json::from_string( c.json_metadata ).as<comment_metadata>();
}
set<string> lower_tags;
for( const auto& tag : meta.tags )
lower_tags.insert(fc::to_lower( tag ) );
lower_tags.insert( fc::to_lower(c.category) );
/// the universal tag applies to everything safe for work or nsfw with a positive payout
if( c.net_rshares >= 0 ||
(lower_tags.find( "spam" ) == lower_tags.end() &&
lower_tags.find( "nsfw" ) == lower_tags.end() &&
lower_tags.find( "test" ) == lower_tags.end() ) )
{
lower_tags.insert( string() ); /// add it to the universal tag
}
meta.tags = lower_tags; /// TODO: std::move???
const auto& comment_idx = _db.get_index_type<tag_index>().indices().get<by_comment>();
auto citr = comment_idx.lower_bound( c.id );
map<string, const tag_object*> existing_tags;
vector<const tag_object*> remove_queue;
while( citr != comment_idx.end() && citr->comment == c.id ) {
const tag_object* tag = &*citr;
++citr;
if( meta.tags.find( tag->tag ) == meta.tags.end() ) {
remove_queue.push_back(tag);
} else {
existing_tags[tag->tag] = tag;
}
}
for( const auto& tag : meta.tags ) {
auto existing = existing_tags.find(tag);
if( existing == existing_tags.end() ) {
create_tag( tag, c, hot );
} else {
update_tag( *existing->second, c, hot );
}
}
for( const auto& item : remove_queue )
remove_tag(*item);
if( c.parent_author.size() )
{
update_tags( _db.get_comment( c.parent_author, c.parent_permlink ) );
}
} FC_CAPTURE_LOG_AND_RETHROW( (c) )
}
/** finds tags that have been added or removed or updated */
void update_tags( const comment_object& c )const {
try {
auto hot = calculate_hot(c);
comment_metadata meta;
if( c.json_metadata.size() )
{
try
{
meta = fc::json::from_string( c.json_metadata ).as<comment_metadata>();
}
catch( const fc::exception& e )
{
// Do nothing on malformed json_metadata
}
}
set<string> lower_tags;
for( const auto& tag : meta.tags )
lower_tags.insert(fc::to_lower( tag ) );
lower_tags.insert( fc::to_lower(c.category) );
bool safe_for_work = false;
/// the universal tag applies to everything safe for work or nsfw with a positive payout
if( c.net_rshares >= 0 ||
(lower_tags.find( "spam" ) == lower_tags.end() &&
lower_tags.find( "nsfw" ) == lower_tags.end() &&
lower_tags.find( "test" ) == lower_tags.end() ) )
{
safe_for_work = true;
lower_tags.insert( string() ); /// add it to the universal tag
}
meta.tags = lower_tags; /// TODO: std::move???
if( meta.tags.size() > 7 ) {
//wlog( "ignoring post ${a} because it has ${n} tags",("a", c.author + "/"+c.permlink)("n",meta.tags.size()));
if( safe_for_work )
meta.tags = set<string>({"", c.parent_permlink});
else
meta.tags.clear();
}
const auto& comment_idx = _db.get_index_type<tag_index>().indices().get<by_comment>();
auto citr = comment_idx.lower_bound( c.id );
map<string, const tag_object*> existing_tags;
vector<const tag_object*> remove_queue;
while( citr != comment_idx.end() && citr->comment == c.id ) {
const tag_object* tag = &*citr;
++citr;
if( meta.tags.find( tag->tag ) == meta.tags.end() ) {
remove_queue.push_back(tag);
} else {
existing_tags[tag->tag] = tag;
}
}
for( const auto& tag : meta.tags ) {
auto existing = existing_tags.find(tag);
if( existing == existing_tags.end() ) {
create_tag( tag, c, hot );
} else {
update_tag( *existing->second, c, hot );
}
}
for( const auto& item : remove_queue )
remove_tag(*item);
if( c.parent_author.size() )
{
update_tags( _db.get_comment( c.parent_author, c.parent_permlink ) );
}
} FC_CAPTURE_LOG_AND_RETHROW( (c) )
}