New command stickernamestypes

NEWS

@@ -10,7 +10,7 @@ ver 0.24 (not yet released)
   - show PCRE support in "config" response
   - apply Unicode normalization to case-insensitive filter expressions
   - stickers on playlists and some tag types
-  - new commands "stickernames", "stickertypes", "playlistlength", "searchplaylist"
+  - new commands "stickernames", "stickertypes", "stickernamestypes", "playlistlength", "searchplaylist"
   - new "search"/"find" filter "added-since"
   - allow range in listplaylist and listplaylistinfo
   - "sticker find" supports sort and window parameter and new sticker compare operators "eq", "lt" and "gt"

doc/protocol.rst

@@ -1590,6 +1590,9 @@ Examples:
 :command:`stickertypes`
     Shows a list of available sticker types.
 
+:command:`stickernamestypes [TYPE]`
+    Gets a list of uniq sticker names and their types.
+
 Connection settings
 ===================
 

src/command/AllCommands.cxx

@@ -190,6 +190,7 @@ static constexpr struct command commands[] = {
 	{ "sticker", PERMISSION_ADMIN, 3, -1, handle_sticker },
 	{ "stickernames", PERMISSION_ADMIN, 0, 0, handle_sticker_names },
 	{ "stickertypes", PERMISSION_ADMIN, 0, 0, handle_sticker_types },
+	{ "stickernamestypes", PERMISSION_ADMIN, 0, 1, handle_sticker_names_types },
 #endif
 	{ "stop", PERMISSION_PLAYER, 0, 0, handle_stop },
 	{ "subscribe", PERMISSION_READ, 1, 1, handle_subscribe },

src/command/StickerCommands.cxx

@@ -124,6 +124,25 @@ class DomainHandler {
 		return CommandResult::OK;
 	}
 
+	CommandResult NamesTypes(const char *type) {
+		auto data = CallbackContext{
+			.name = "",
+			.sticker_type = sticker_type,
+			.response = response,
+			.is_song = StringIsEqual("song", sticker_type)
+		};
+
+		auto callback = [](const char *found_value, const char *found_type, void *user_data) {
+			auto context = reinterpret_cast<CallbackContext *>(user_data);
+			context->response.Fmt("name: {}\n", found_value);
+			context->response.Fmt("type: {}\n", found_type);
+		};
+
+		sticker_database.NamesTypes(type, callback, &data);
+
+		return CommandResult::OK;
+	}
+
 protected:
 	DomainHandler(Response &_response,
 		      const Database &_database,
@@ -334,6 +353,43 @@ handle_sticker_names(Client &client, Request args, Response &r)
 	return handler->Names();
 }
 
+CommandResult
+handle_sticker_names_types(Client &client, Request args, Response &r)
+{
+	auto &instance = client.GetInstance();
+	if (!instance.HasStickerDatabase()) {
+		r.Error(ACK_ERROR_UNKNOWN, "sticker database is disabled");
+		return CommandResult::ERROR;
+	}
+
+	auto &db = client.GetPartition().GetDatabaseOrThrow();
+	auto &sticker_database = *instance.sticker_database;
+
+	auto type = args.GetOptional(0);
+	std::unique_ptr<DomainHandler> handler = std::make_unique<SongHandler>(r, db, sticker_database);
+
+	if (type == nullptr ||
+	    StringIsEqual(type, "song") ||
+	    StringIsEqual(type, "playlist") ||
+	    StringIsEqual(type, "filter")) {
+		return handler->NamesTypes(type);
+	}
+	auto tag_type = tag_name_parse(type);
+	if (tag_type == TAG_NUM_OF_ITEM_TYPES) {
+		r.FmtError(ACK_ERROR_ARG, "no such tag {:?}", type);
+		return CommandResult::ERROR;
+	}
+	else if (sticker_allowed_tags.Test(tag_type)) {
+		return handler->NamesTypes(type);
+	}
+	else {
+		r.FmtError(ACK_ERROR_ARG, "unsupported tag {:?}", type);
+		return CommandResult::ERROR;
+	}
+	r.FmtError(ACK_ERROR_ARG, "unknown sticker domain {:?}", type);
+	return CommandResult::ERROR;
+}
+
 CommandResult
 handle_sticker(Client &client, Request args, Response &r)
 {

src/command/StickerCommands.hxx

@@ -16,5 +16,7 @@ CommandResult
 handle_sticker_names(Client &client, Request request, Response &response);
 CommandResult
 handle_sticker_types(Client &client, Request request, Response &response);
+CommandResult
+handle_sticker_names_types(Client &client, Request request, Response &response);
 
 #endif

src/sticker/Database.cxx

@@ -46,6 +46,8 @@ enum sticker_sql {
 	STICKER_SQL_TRANSACTION_COMMIT,
 	STICKER_SQL_TRANSACTION_ROLLBACK,
 	STICKER_SQL_NAMES,
+	STICKER_SQL_NAMES_TYPES,
+	STICKER_SQL_NAMES_TYPES_BY_TYPE,
 
 	STICKER_SQL_COUNT
 };
@@ -106,7 +108,13 @@ static constexpr auto sticker_sql = std::array {
 	"ROLLBACK",
 
 	//[STICKER_SQL_NAMES]
-	"SELECT DISTINCT name FROM sticker order by name",
+	"SELECT DISTINCT name FROM sticker ORDER BY name",
+
+	//[STICKER_SQL_NAMES_TYPES]
+	"SELECT name,type FROM sticker GROUP BY name,type ORDER BY name",
+
+	//[STICKER_SQL_NAMES_TYPES_BY_TYPE]
+	"SELECT name,type FROM sticker WHERE type = ? GROUP BY name,type ORDER BY name",
 };
 
 static constexpr const char sticker_sql_create[] =
@@ -478,6 +486,29 @@ StickerDatabase::Names(void (*func)(const char *value, void *user_data), void *u
 		});
 }
 
+void
+StickerDatabase::NamesTypes(const char *type, void (*func)(const char *value, const char *type, void *user_data), void *user_data)
+{
+	assert(func != nullptr);
+
+	sqlite3_stmt *const s = type == nullptr
+		? stmt[STICKER_SQL_NAMES_TYPES]
+		: stmt[STICKER_SQL_NAMES_TYPES_BY_TYPE];
+	assert(s != nullptr);
+
+	if (type != nullptr)
+		BindAll(s, type);
+
+	AtScopeExit(s) {
+		sqlite3_reset(s);
+	};
+
+	ExecuteForEach(s, [s, func, user_data](){
+			func((const char*)sqlite3_column_text(s, 0),
+			     (const char*)sqlite3_column_text(s, 1), user_data);
+		});
+}
+
 void
 StickerDatabase::BatchDeleteNoIdle(const std::list<StickerTypeUriPair> &stickers)
 {

src/sticker/Database.hxx

@@ -52,6 +52,8 @@ class StickerDatabase {
 		  SQL_TRANSACTION_COMMIT,
 		  SQL_TRANSACTION_ROLLBACK,
 		  SQL_NAMES,
+		  SQL_NAMES_TYPES,
+		  SQL_NAMES_TYPES_BY_TYPE,
 
 		  SQL_COUNT
 	};
@@ -166,6 +168,11 @@ public:
 	 */
 	void Names(void (*func)(const char *value, void *user_data), void *user_data);
 
+	/**
+	 * Uniq and sorted list of all sticker names by type
+	 */
+	void NamesTypes(const char *type, void (*func)(const char *value, const char *type, void *user_data), void *user_data);
+
 	using StickerTypeUriPair = std::pair<std::string, std::string>;
 
 	/**