PHP Code:
events_ids_translate[EVENT_GAME_NEWMAP]<-["game_newmap",["mapname"]];
events_ids_translate[EVENT_NEXTLEVEL_CHANGED]<-["nextlevel_changed",["nextlevel"]];
events_ids_translate[EVENT_ENDMATCH_MAPVOTE_SELECTING_MAP]<-["endmatch_mapvote_selecting_map",["count","slot1","slot2","slot3","slot4","slot5","slot6","slot7","slot8","slot9","slot10"]];
events_ids_translate[EVENT_ENDMATCH_CMM_START_REVEAL_ITEMS]<-["endmatch_cmm_start_reveal_items",[]];
Try `nextlevel_changed` event (parametes: "nextlevel") (string ???)
If it doesn't work try `endmatch_mapvote_selecting_map` event (parameters: "count","slot1","slot2","slot3","slot4","slot 5","slot6","slot7","slot8","slot9","slot10 ").
I don't know when it's called and i don't know if the parameters are strings or ints. If it's called at every vote, you can start sending your own maps in the vote and then you count the votes.
https://forums.alliedmods.net/showthread.php?t=288728
`endmatch_cmm_start_reveal_items` has no parameters.