add options to show api command to show applications, codecs, file formats, ect.…

add options to show api command to show applications, codecs, file formats, ect. and cleanup the output format of this command.  Thanks jkr888 (Johny Kadarisman) for the contribution.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1630 d0543943-73ff-0310-b7d9-9358b9ac24b2

AUTHORS

@@ -21,6 +21,7 @@ that much better:
   and moral support.
  Michal "cypromis" Bielicki (michal.bielicki  AT halo2.pl) - Solaris porting, and autotools enhancements.
  James Martelletti <james@nerdc0re.com> - All around cool guy (mod_syslog)
+ Johny Kadarisman <jkr888@gmail.com>
  
 A big THANK YOU goes to:
 

src/mod/applications/mod_commands/mod_commands.c

@@ -24,6 +24,8 @@
  * Contributor(s):
  * 
  * Anthony Minessale II <anthmct@yahoo.com>
+ * Michael Jerris <mike@jerris.com>
+ * Johny Kadarisman <jkr888@gmail.com>
  *
  * 
  * mod_commands.c -- Misc. Command Module
@@ -185,7 +187,7 @@ static switch_status_t pause_function(char *cmd, switch_stream_handle_t *stream)
 static int show_callback(void *pArg, int argc, char **argv, char **columnNames){
 	switch_stream_handle_t *stream = (switch_stream_handle_t *) pArg;
 
-	stream->write_function(stream, "%s\n", argv[1]);
+	stream->write_function(stream, "%s|%s\n", argv[0], argv[1] ? argv[1] : "NULL");
 	return 0;
 }
 
@@ -196,7 +198,22 @@ static switch_status_t show_function(char *cmd, switch_stream_handle_t *stream)
 	char *errmsg;
 	switch_core_db_t *db = switch_core_db_handle();
 
-	sprintf (sql, "select * from interfaces");
+    if (!cmd) {
+        sprintf (sql, "select * from interfaces");
+    }
+    else if ( !strcmp(cmd,"codec") || !strcmp(cmd,"application") || 
+              !strcmp(cmd,"api") || !strcmp(cmd,"dialplan") || 
+              !strcmp(cmd,"file") || !strcmp(cmd,"timer") 
+            ) {
+        sprintf (sql, "select * from interfaces where type = '%s'", cmd);
+    }
+    else {
+        stream->write_function(stream, "Invalid interfaces type!\n");
+        stream->write_function(stream, "Example:\n");
+        stream->write_function(stream, "show <blank>|codec|application|api|dialplan|file|timer\n");
+        return SWITCH_STATUS_SUCCESS;
+    }
+    
 	switch_core_db_exec(db, sql, show_callback, stream, &errmsg);
 
 	if (errmsg) {