TF2 Voting

Team Fortress 2 has a new voting system based on the Left 4 Dead Voting system and is controlled by Game Events and User Messages. You can use either a string from the resource file, or TF_playerid_noteam which will let you create any vote you want.

How voting works

The server begins by sending a vote_options event, which has values set if it's a multiple choice votes or repeats the last valid multiple choice set (or garbage data if no multiple choice votes have occurred yet). This is followed by the VoteStart User Message, the last argument determines the vote type. Clients use the "vote" command to register their votes (option1 through option5), after which the server sends a vote_cast event with a 0-based option number (so option1 = 0, option5 = 4).

When the vote is complete, the server send either a VotePass or VoteFailed User Message.

Failure reasons

The VoteFailed User Message does not take a string to display. Instead, it takes a number that corresponds to a specific message.

The values that work are:

0 - Generic "Vote Failed" message
3 - Yes votes must outnumber No votes
4 - Not Enough Votes

Other error numbers exist, but they are used by the CallVoteFailed User Message, which is sent to a single client:

1 = Cannot call vote while other players are still loading
2 = You called a vote recently and cannot call another one for X seconds (second argument to CallVoteFailed specifies the number of seconds)
5 - Server has disabled that issue.
6 - That map does not exist.
7 - You must specify a map name
8 - This vote failed recently
9 - Your team cannot call this vote
10 - Voting not allowed while Waiting for Players

User Messages

The User Messages that exist in the TF2 Voting system are:

VoteSetup

   - Byte      Count of vote issues allowed on this server
   * String    Vote Issues, same number as Count above.

VoteStart

   - Byte      Team index or -1 for all
   - Byte      Client index (NOT USERID) of person who started the vote, or 99 for the server.
   - String    Vote issue translation string
   - String    Vote issue text
   - Bool      true for Yes/No, false for Multiple choice

VotePass

   - Byte      Team index or -1 for all
   - String    Vote issue translation string
   - String    Vote winner (same as vote issue text for Yes/No?)

VoteFail

   - Byte      Team index or -1 for all
   - Byte      Failure reason code (0, 3-4)

CallVoteFailed

   - Byte      Failure reason code (1-2, 5-10)
   - Short     If above is 2, number of seconds until you can next start a vote.

Events

Note: Sent to all players when a player chooses a vote option (or more specifically, the server receives a vote command)

Name:	vote_cast
Structure:	byte vote_option which option the player voted on short team long entityid entity id of the voter

Note: Sent to players before VoteStart UserMessage to populate choices for a multiple choice vote

Name:	vote_options
Structure:	byte count Number of options - up to MAX_VOTE_OPTIONS [ed: 5] string option1 string option2 string option3 string option4 string option5

Unused?

Name:	vote_ended
Structure:

Name:	vote_started
Structure:	string issue string param1 byte team long initiator entity id of the player who initiated the vote

Name:	vote_changed
Structure:	byte option1 byte option2 byte option3 byte option4 byte option5 byte potentialVotes

Name:	vote_passed
Structure:	string details string param1 byte team

Name:	vote_failed
Structure:	byte team

Example voting plugin

This is a basic plugin that starts a vote, "Is gaben fat?". It does not ensure the same client does not vote multiple times, nor does it actually kick the user.

#include <sourcemod>
// TF2's internal map vote uses client index 99 for the server
#define TF2_SERVER_CLIENT_INDEX 99
#define TF2_TEAM_ALL -1

new yesvotes;
new novotes;
#define MAX_VOTES 4

public Plugin:myinfo = 
{
	name = "Test Yes/No Vote",
	author = "Powerlord",
	description = "A test vote plugin for the AlliedMods wiki",
	version = "1.0",
	url = "http://wiki.alliedmods.net/TF2_Voting"
}

public OnPluginStart()
{
	RegConsoleCmd("testvote",Callvote_Handler);
	RegConsoleCmd("vote", vote);
}

public Action:Callvote_Handler(client, args)
{
	new Handle:bf = StartMessageAll("VoteStart", USERMSG_RELIABLE);
	BfWriteByte(bf, TF2_TEAM_ALL);
	BfWriteByte(bf, TF2_SERVER_CLIENT_INDEX);
	BfWriteString(bf, "#TF_playerid_noteam");
	BfWriteString(bf, "Is gaben fat?");
	BfWriteBool(bf, true);
	EndMessage();
	
	yesvotes = 0;
	novotes = 0;
	
	return Plugin_Handled;
}

UpdateVotes()
{
	if (yesvotes+novotes >= MAX_VOTES)
	{
		PrintToServer("voting complete!");
		if (yesvotes > novotes)
		{
			new Handle:bf = StartMessageAll("VotePass");
			BfWriteByte(bf, TF2_TEAM_ALL);
			BfWriteString(bf, "#TF_playerid_noteam");
			BfWriteString(bf, "Gaben is fat");
			EndMessage();
		}
		else
		{
			new Handle:bf = StartMessageAll("VoteFailed");
			BfWriteByte(bf, TF2_TEAM_ALL);
			// Check list of failure reasons
			BfWriteByte(bf, 3);
			EndMessage();
		}
	}
}

// If the TF2 vote system is running (sv_allow_votes 1), this needs to be a command listener because TF2 registers the vote command only when a vote is ongoing, and thus hooking it using RegConsoleCmd doesn't work.
public Action:vote(client, args)
{
	new String:arg[8];
	new option = 0;
	GetCmdArg(1,arg,8);
	PrintToServer("Got vote %s from %i",arg,client);
	if (strcmp(arg,"option1",true) == 0)
	{
		yesvotes++;
		option = 0;
	}
	else if (strcmp(arg,"option2",true) == 0)
	{
		novotes++;
		option = 1;
	}
	
	new Handle:msg = CreateEvent("vote_cast");
	SetEventInt(msg, "entityid", client);
	SetEventInt(msg, "team", -1);
	SetEventInt(msg, "vote_option", option);
	FireEvent(msg);
	
	UpdateVotes();
	return Plugin_Continue;
}

See the following images for examples what this looks like:

Vote started

Vote passed

Vote failed