[smartpl] Added rule for enum tags like data_kind and media_kind to

avoid having magic numbers like "media_kind = 1" in smartplaylists. Enum
rules are defined like "media_kind is music" with a fixed set of valid
values after the "is" keyword.

src/SMARTPL.g

@@ -41,6 +41,7 @@ crit		:	LPAR expression RPAR	->	expression
 			|	STRTAG (INCLUDES|IS) STR
 			|	INTTAG INTBOOL INT
 			|	DATETAG	(AFTER|BEFORE) dateval
+			|	ENUMTAG IS ENUMVAL
 			;
 
 dateval		:	DATE
@@ -62,20 +63,26 @@ STRTAG		:	'artist'
 			|	'type'
 			;
 
+INTTAG		:	'play_count'
+			|	'rating'
+			|	'year'
+			|	'compilation'
+			;
+
+DATETAG		:	'time_added'
+			|	'time_played'
+			;
+
+ENUMTAG		:	'data_kind'
+			|	'media_kind'
+			;
+
 INCLUDES	:	'includes'
 			;
 
 IS			:	'is'
 			;
 
-INTTAG		:	'data_kind'
-			|	'media_kind'
-			|	'play_count'
-			|	'rating'
-			|	'year'
-			|	'compilation'
-			;
-
 INTBOOL		:	(GREATER|GREATEREQUAL|LESS|LESSEQUAL|EQUAL)
 			;
 
@@ -99,10 +106,6 @@ fragment
 EQUAL		:	'='
 			;
 
-DATETAG		:	'time_added'
-			|	'time_played'
-			;
-
 AFTER		:	'after'
 			;
 
@@ -144,6 +147,17 @@ DATINTERVAL	:	'days'
 			|	'years'
 			;
 
+ENUMVAL		:	'music'
+			|	'movie'
+			|	'podcast'
+			|	'audiobook'
+			|	'tvshow'
+			|	'file'
+			|	'url'
+			|	'spotify'
+			|	'pipe'
+			;
+
 STR			:	'"' ~('"')+ '"'
 			;
 

src/SMARTPL2SQL.g

@@ -34,6 +34,7 @@ options {
 	#include <sqlite3.h>
 
 	#include "logger.h"
+	#include "db.h"
 }
 
 @members {
@@ -145,6 +146,62 @@ expression	returns [ pANTLR3_STRING result ]
 			$result->append8($result, " > ");
 			$result->append8($result, str);
 		}
+	|	ENUMTAG IS ENUMVAL
+		{
+			pANTLR3_UINT8 tag;
+			pANTLR3_UINT8 val;
+			char str[20];
+			
+			sprintf(str, "1=1");
+			
+			tag = $ENUMTAG.text->chars;
+			val = $ENUMVAL.text->chars;
+			if (strcmp((char *)tag, "media_kind") == 0)
+			{
+				if (strcmp((char *)val, "music") == 0)
+				{
+					sprintf(str, "f.media_kind = \%d", MEDIA_KIND_MUSIC);
+				}
+				else if (strcmp((char *)val, "movie") == 0)
+				{
+					sprintf(str, "f.media_kind = \%d", MEDIA_KIND_MOVIE);
+				}
+				else if (strcmp((char *)val, "podcast") == 0)
+				{
+					sprintf(str, "f.media_kind = \%d", MEDIA_KIND_PODCAST);
+				}
+				else if (strcmp((char *)val, "audiobook") == 0)
+				{
+					sprintf(str, "f.media_kind = \%d", MEDIA_KIND_AUDIOBOOK);
+				}
+				else if (strcmp((char *)val, "tvshow") == 0)
+				{
+					sprintf(str, "f.media_kind = \%d", MEDIA_KIND_TVSHOW);
+				}
+			}
+			else if (strcmp((char *)tag, "data_kind") == 0)
+			{
+				if (strcmp((char *)val, "file") == 0)
+				{
+					sprintf(str, "f.data_kind = \%d", DATA_KIND_FILE);
+				}
+				else if (strcmp((char *)val, "url") == 0)
+				{
+					sprintf(str, "f.data_kind = \%d", DATA_KIND_URL);
+				}
+				else if (strcmp((char *)val, "spotify") == 0)
+				{
+					sprintf(str, "f.data_kind = \%d", DATA_KIND_SPOTIFY);
+				}
+				else if (strcmp((char *)val, "pipe") == 0)
+				{
+					sprintf(str, "f.data_kind = \%d", DATA_KIND_PIPE);
+				}
+			}
+			
+			$result = $ENUMTAG.text->factory->newRaw($ENUMTAG.text->factory);
+			$result->append8($result, str);
+		}
 	;
 
 dateval		returns [ int result ]