End-of-map vote with random maps from the map cycle, a HUD countdown, recent-map exclusion and an optional extend option.
csb_mapchooser.sma v1.0.0
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/*
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* CSB Map Chooser
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* Copyright (C) 2026 counter-strike-boost.com
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*
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* End-of-map vote. A short time before the time limit runs out the plugin opens
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* a menu with a handful of random maps taken from the map cycle (excluding the
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* current map and the last few that were played, which are tracked in a file),
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* counts the votes with a HUD countdown and sets amx_nextmap to the winner. If
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* enabled, players can instead vote to extend the current map, up to a capped
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* number of extensions.
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*
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* Inspired by the original AMX Mod X MapChooser. This is an independent GPL
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* re-implementation; no original code is reused.
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*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version. It is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See <https://www.gnu.org/licenses/> for details.
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*/
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#include <amxmodx>
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new const PLUGIN[] = "CSB Map Chooser"
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new const VERSION[] = "1.0.0"
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new const AUTHOR[] = "counter-strike-boost.com"
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#define MAX_CHOICES 6
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#define EXTEND_SLOT MAX_CHOICES /* votes[] index used by the extend option */
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new g_pEnabled, g_pStart, g_pChoices, g_pDuration
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new g_pExtend, g_pExtendStep, g_pExtendMax, g_pRecent
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new g_szChoice[MAX_CHOICES][32]
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new g_iVotes[MAX_CHOICES + 1]
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new g_iNumChoices
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new bool:g_bExtendOffered
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new bool:g_bVoted[33]
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new bool:g_bVoteActive
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new bool:g_bDecided
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new g_iExtendsDone
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new g_iSecondsLeft
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new g_menu = -1
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public plugin_init()
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{
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register_plugin(PLUGIN, VERSION, AUTHOR)
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g_pEnabled = register_cvar("csb_mc_enabled", "1")
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g_pStart = register_cvar("csb_mc_start", "90") /* seconds before end to open the vote */
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g_pChoices = register_cvar("csb_mc_choices", "5")
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g_pDuration = register_cvar("csb_mc_duration", "20")
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g_pExtend = register_cvar("csb_mc_extend", "1")
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g_pExtendStep = register_cvar("csb_mc_extendstep", "15") /* minutes added per extend */
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g_pExtendMax = register_cvar("csb_mc_extendmax", "2")
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g_pRecent = register_cvar("csb_mc_recent", "3")
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register_clcmd("say /nextmap", "cmdNextmap")
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set_task(15.0, "checkTime", 0, _, _, "b")
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}
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public cmdNextmap(id)
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{
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new nextmap[32]
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get_cvar_string("amx_nextmap", nextmap, charsmax(nextmap))
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client_print(id, print_chat, "[CSB] Next map: %s", nextmap[0] ? nextmap : "not decided yet")
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return PLUGIN_HANDLED
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}
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public checkTime()
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{
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if (!get_pcvar_num(g_pEnabled) || g_bVoteActive || g_bDecided)
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return
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new left = get_timeleft()
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/* no timelimit, or too early */
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if (left <= 10 || left > get_pcvar_num(g_pStart))
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return
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startVote()
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}
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startVote()
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{
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new pool[64][32], poolCount = 0
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gatherMaps(pool, poolCount)
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if (poolCount < 2)
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{
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log_amx("[CSB MapChooser] not enough eligible maps to hold a vote.")
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g_bDecided = true
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return
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}
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new want = get_pcvar_num(g_pChoices)
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if (want < 2) want = 2
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if (want > MAX_CHOICES) want = MAX_CHOICES
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if (want > poolCount) want = poolCount
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g_iNumChoices = 0
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for (new i = 0; i < want; i++)
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{
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new pick = random_num(0, poolCount - 1)
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copy(g_szChoice[g_iNumChoices], charsmax(g_szChoice[]), pool[pick])
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g_iNumChoices++
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/* remove the chosen map so it cannot be picked twice */
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pool[pick] = pool[poolCount - 1]
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poolCount--
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}
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for (new i = 0; i <= MAX_CHOICES; i++)
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g_iVotes[i] = 0
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for (new id = 1; id <= 32; id++)
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g_bVoted[id] = false
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g_bExtendOffered = (get_pcvar_num(g_pExtend) != 0 && g_iExtendsDone < get_pcvar_num(g_pExtendMax))
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buildMenu()
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new players[32], num
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get_players(players, num, "ch")
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for (new i = 0; i < num; i++)
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menu_display(players[i], g_menu, 0)
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g_bVoteActive = true
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new dur = get_pcvar_num(g_pDuration)
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if (dur < 5) dur = 5
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g_iSecondsLeft = dur
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set_task(1.0, "voteTick", 0, _, _, "a", dur)
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set_task(float(dur), "endVote")
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client_print_color(0, print_team_default, "^x04[CSB]^x03 Vote for the next map!^x01 Check the menu.")
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}
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buildMenu()
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{
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if (g_menu != -1)
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{
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menu_destroy(g_menu)
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g_menu = -1
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}
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g_menu = menu_create("\yVote for the next map\w", "voteHandler")
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new item[48]
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for (new i = 0; i < g_iNumChoices; i++)
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{
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formatex(item, charsmax(item), "%s", g_szChoice[i])
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menu_additem(g_menu, item)
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}
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if (g_bExtendOffered)
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{
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formatex(item, charsmax(item), "\rExtend the current map (+%d min)", get_pcvar_num(g_pExtendStep))
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menu_additem(g_menu, item)
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}
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menu_setprop(g_menu, MPROP_EXIT, MEXIT_ALL)
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}
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public voteHandler(id, menu, item)
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{
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if (item == MENU_EXIT || !g_bVoteActive)
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return PLUGIN_HANDLED
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if (g_bVoted[id])
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return PLUGIN_HANDLED
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/* extend option sits right after the map items */
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if (g_bExtendOffered && item == g_iNumChoices)
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{
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g_iVotes[EXTEND_SLOT]++
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g_bVoted[id] = true
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client_print(id, print_chat, "[CSB] You voted to extend the current map.")
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return PLUGIN_HANDLED
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}
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if (item >= 0 && item < g_iNumChoices)
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{
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g_iVotes[item]++
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g_bVoted[id] = true
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client_print(id, print_chat, "[CSB] You voted for %s.", g_szChoice[item])
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}
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return PLUGIN_HANDLED
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}
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public voteTick()
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{
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if (!g_bVoteActive)
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return
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if (g_iSecondsLeft > 0)
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g_iSecondsLeft--
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set_hudmessage(255, 200, 0, -1.0, 0.20, 0, 0.0, 1.1, 0.0, 0.0, -1)
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show_hudmessage(0, "Map vote: %d second(s) left", g_iSecondsLeft)
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}
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public endVote()
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{
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g_bVoteActive = false
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new best = -1, bestVotes = -1
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for (new i = 0; i < g_iNumChoices; i++)
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{
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if (g_iVotes[i] > bestVotes)
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{
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bestVotes = g_iVotes[i]
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best = i
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}
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}
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new bool:extendWon = false
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if (g_bExtendOffered && g_iVotes[EXTEND_SLOT] > bestVotes)
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{
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extendWon = true
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bestVotes = g_iVotes[EXTEND_SLOT]
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}
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if (extendWon)
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{
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new step = get_pcvar_num(g_pExtendStep)
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new Float:cur = get_cvar_float("mp_timelimit")
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set_cvar_float("mp_timelimit", cur + float(step))
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g_iExtendsDone++
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g_bDecided = false /* allow another vote later */
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client_print_color(0, print_team_default,
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"^x04[CSB]^x03 The current map was extended by^x04 %d^x01 minute(s) (%d vote(s)).",
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step, bestVotes)
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}
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else if (best != -1)
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{
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set_cvar_string("amx_nextmap", g_szChoice[best])
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g_bDecided = true
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rememberCurrentMap()
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client_print_color(0, print_team_default,
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"^x04[CSB]^x03 Next map will be^x04 %s^x01 (%d vote(s)).",
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g_szChoice[best], bestVotes)
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}
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else
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{
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g_bDecided = true
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}
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if (g_menu != -1)
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{
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menu_destroy(g_menu)
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g_menu = -1
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}
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}
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/* ---------- map pool ---------- */
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gatherMaps(pool[][], &count)
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{
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count = 0
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new cur[32]
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get_mapname(cur, charsmax(cur))
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new recent[16][32], recentNum = 0
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loadRecent(recent, recentNum)
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new cyclefile[64]
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get_cvar_string("mapcyclefile", cyclefile, charsmax(cyclefile))
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if (!cyclefile[0])
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copy(cyclefile, charsmax(cyclefile), "mapcycle.txt")
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new fp = fopen(cyclefile, "rt")
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if (!fp)
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return
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new line[64], map[32]
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while (!feof(fp) && count < 64)
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{
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fgets(fp, line, charsmax(line))
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trim(line)
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if (!line[0] || line[0] == ';' || (line[0] == '/' && line[1] == '/'))
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continue
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/* first token is the map name */
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new i = 0, j = 0
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while (line[i] && line[i] != ' ' && line[i] != '^t' && j < charsmax(map))
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map[j++] = line[i++]
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map[j] = 0
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if (!map[0] || equali(map, cur) || !is_map_valid(map))
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continue
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if (inList(map, recent, recentNum) || inList(map, pool, count))
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continue
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copy(pool[count], 31, map)
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count++
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}
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fclose(fp)
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}
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bool:inList(const map[], const list[][], num)
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{
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for (new i = 0; i < num; i++)
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if (equali(list[i], map))
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return true
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return false
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}
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loadRecent(recent[][], &num)
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{
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num = 0
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new path[160]
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recentPath(path, charsmax(path))
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if (!file_exists(path))
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return
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new fp = fopen(path, "rt")
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if (!fp)
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return
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new line[32]
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new keep = get_pcvar_num(g_pRecent)
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while (!feof(fp) && num < 16)
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{
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fgets(fp, line, charsmax(line))
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trim(line)
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if (!line[0])
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continue
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copy(recent[num], 31, line)
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num++
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}
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fclose(fp)
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/* only the last 'keep' entries actually count */
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if (keep >= 0 && num > keep)
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{
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new drop = num - keep
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for (new i = 0; i < keep; i++)
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copy(recent[i], 31, recent[i + drop])
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num = keep
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}
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}
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rememberCurrentMap()
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{
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new cur[32]
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get_mapname(cur, charsmax(cur))
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new path[160]
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recentPath(path, charsmax(path))
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new lines[16][32], num = 0
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if (file_exists(path))
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{
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new fp = fopen(path, "rt")
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if (fp)
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{
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new line[32]
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while (!feof(fp) && num < 16)
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{
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fgets(fp, line, charsmax(line))
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trim(line)
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if (line[0])
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{
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copy(lines[num], 31, line)
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num++
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}
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}
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fclose(fp)
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}
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}
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/* keep the most recent 15, then append the current map */
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new start = 0
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if (num >= 15)
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start = num - 14
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new fw = fopen(path, "wt")
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if (!fw)
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return
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for (new i = start; i < num; i++)
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{
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fputs(fw, lines[i])
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fputs(fw, "^n")
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}
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fputs(fw, cur)
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fputs(fw, "^n")
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fclose(fw)
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}
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recentPath(out[], len)
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{
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new dir[128]
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get_localinfo("amxx_configsdir", dir, charsmax(dir))
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formatex(out, len, "%s/csb_mc_recent.ini", dir)
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}
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