Adding tagtypes command to list available tag types (takes metadata_to_use

src/command.c

@@ -95,6 +95,7 @@
 #define COMMAND_PLAYLISTADD	"playlistadd"
 #define COMMAND_PLAYLISTFIND	"playlistfind"
 #define COMMAND_PLAYLISTSEARCH	"playlistsearch"
+#define COMMAND_TAGTYPES	"tagtypes"
 
 #define COMMAND_STATUS_VOLUME           "volume"
 #define COMMAND_STATUS_STATE            "state"
@@ -177,6 +178,12 @@ static int handleUrlHandlers(int fd, int *permission, int argc, char *argv[])
 	return printRemoteUrlHandlers(fd);
 }
 
+static int handleTagTypes(int fd, int *permission, int argc, char *argv[])
+{
+	printTagTypes(fd);
+	return 0;
+}
+
 static int handlePlay(int fd, int *permission, int argc, char *argv[])
 {
 	int song = -1;
@@ -1043,6 +1050,7 @@ void initCommands(void)
 	addCommand(COMMAND_PLAYLISTADD,      PERMISSION_CONTROL, 2,   2,   handlePlaylistAdd,          NULL);
 	addCommand(COMMAND_PLAYLISTFIND,     PERMISSION_READ,    2,   -1,  handlePlaylistFind,         NULL);
 	addCommand(COMMAND_PLAYLISTSEARCH,   PERMISSION_READ,    2,   -1,  handlePlaylistSearch,       NULL);
+	addCommand(COMMAND_TAGTYPES,         PERMISSION_READ,    0,   0,   handleTagTypes,             NULL);
 
 	sortList(commandList);
 }

src/tag.c

@@ -116,6 +116,16 @@ void initTagConfig(void)
 	free(temp);
 }
 
+void printTagTypes(int fd)
+{
+	int i;
+
+	for (i = 0; i < TAG_NUM_OF_ITEM_TYPES; i++) {
+		if (ignoreTagItems[i] == 0)
+			fdprintf(fd, "tagtype: %s\n", mpdTagItemKeys[i]);
+	}
+}
+
 void printMpdTag(int fd, MpdTag * tag)
 {
 	int i;

src/tag.h

@@ -78,6 +78,8 @@ void addItemToMpdTagWithLen(MpdTag * tag, int itemType, char *value, int len);
 #define addItemToMpdTag(tag, itemType, value) \
 		addItemToMpdTagWithLen(tag, itemType, value, strlen(value))
 
+void printTagTypes(int fd);
+
 void printMpdTag(int fd, MpdTag * tag);
 
 MpdTag *mpdTagDup(MpdTag * tag);