local userGroups =
{
    vip = true,
    moderator = true,
    superadmin = true,
    admin = true,
    user = true,
	headadmin = true,
	owner = true,
	respected = true,
	coder = true
}

hook.Add("OnPlayerChat", "prefixes", function(ply, text, teamOnly, alive, prefixText, color1, color2)
    if not userGroups[string.lower(ply:GetNWString("usergroup"))] then
        chat.AddText(Color(255, 0, 0, 255), "[" .. ply:GetNWString("usergroup") .. "] ", color1, prefixText, color2, ": "..text)
        return true

	elseif ply:IsValid() and ply:IsPlayer() and ply:IsUserGroup("moderator") then
        rank_str = "Mod"
        rank_col = Color( 0, 255, 255 )
        bracket_col = Color( 0, 255, 255 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true

    elseif ply:IsValid() and ply:IsPlayer() and ply:IsUserGroup("superadmin") then
        rank_str = "SuperAdmin"
        rank_col = Color( 255, 51, 0 )
        bracket_col = Color( 255, 51, 0 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true

	elseif ply:IsValid() and ply:IsPlayer() and ply:IsUserGroup("owner") then
        rank_str = "Owner"
        rank_col = Color( 153, 0, 153 )
        bracket_col = Color( 153, 0, 153 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true

    elseif ply:IsValid() and ply:IsPlayer() and ply:IsUserGroup("admin") then
        rank_str = "Admin"
        rank_col = Color( 51, 255, 0 )
        bracket_col = Color( 51, 255, 0 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true

    elseif ply:IsValid() and ply:IsPlayer() and ply:IsUserGroup("vip") then
        rank_str = "VIP"
        rank_col = Color( 100, 255, 204 )
        bracket_col = Color( 100, 255, 204 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true

	elseif ply:IsValid() and ply:IsPlayer() and ply:IsUserGroup("respected") then
        rank_str = "Respected"
        rank_col = Color( 100, 0, 255 )
        bracket_col = Color( 100, 0, 255 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true

	elseif ply:IsValid() and ply:IsPlayer() and ply:IsUserGroup("coder") then
        rank_str = "Coder"
        rank_col = Color( 0, 153, 102 )
        bracket_col = Color( 0, 153, 102 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true

	elseif ply:IsValid() and ply:IsPlayer() and ply:IsUserGroup("headadmin") then
        rank_str = "HeadAdmin"
        rank_col = Color( 0, 0, 255 )
        bracket_col = Color( 0, 0, 255 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true

    else
        rank_str = "User"
        rank_col = Color( 0, 255, 0 )
        bracket_col = Color( 0, 255, 0 )
        chat.AddText(bracket_col, bracket_col and " [" or "", rank_col, rank_str, bracket_col, bracket_col and "] " or "", color1, prefixText, color2, ": "..text)
        return true
    end
end)