cl_game_multiplayer.cpp

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/*
Copyright (C) 2002-2025 UFO: Alien Invasion.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
 
#include "../../cl_shared.h"
#include "../cl_game.h"
#include "cl_game_multiplayer.h"
#include "mp_callbacks.h"
#include "mp_serverlist.h"
#include "../../ui/ui_data.h"
 
static const cgame_import_t* cgi;
 
CGAME_HARD_LINKED_FUNCTIONS
 
static void GAME_MP_StartBattlescape (bool isTeamPlay)
{
    cgi->UI_ExecuteConfunc("multiplayer_setTeamplay %i", isTeamPlay);
    cgi->UI_InitStack("multiplayer_wait", nullptr);
    rcon_client_password->modified = true;
}
 
static void GAME_MP_NotifyEvent (event_t eventType)
{
    if (eventType != EV_RESET)
        return;
 
    cgi->HUD_InitUI("missionoptions");
}
 
static void GAME_MP_EndRoundAnnounce (int playerNum, int team)
{
    char buf[128];
 
    /* it was our own turn */
    if (cgi->CL_GetPlayerNum() == playerNum) {
        Com_sprintf(buf, sizeof(buf), _("You've ended your turn.\n"));
    } else {
        const char* playerName = cgi->CL_PlayerGetName(playerNum);
        Com_sprintf(buf, sizeof(buf), _("%s ended his turn (team %i).\n"), playerName, team);
    }
    /* add translated message to chat buffer */
    cgi->HUD_DisplayMessage(buf);
}

static void GAME_MP_StartServer_f (void)
{
    if (!cgi->Cvar_GetInteger("sv_dedicated") && cgi->GAME_IsTeamEmpty())
        cgi->GAME_AutoTeam("multiplayer_initial", cgi->GAME_GetCharacterArraySize());
 
    if (cgi->Cvar_GetInteger("sv_teamplay")
     && cl_maxsoldiersperplayer->integer > cl_maxsoldiersperteam->integer) {
        cgi->UI_Popup(_("Settings doesn't make sense"), _("Set soldiers per player lower than soldiers per team"));
        return;
    }
 
    const mapDef_t* md = cgi->GAME_GetCurrentSelectedMap();
    if (!md || !md->multiplayer)
        return;
    assert(md->mapTheme);

    cgi->Cvar_Set("rm_drop", "%s", "");
    cgi->Cvar_Set("rm_ufo", "%s", "");
    cgi->Cvar_Set("sv_hurtaliens", "0");
 
    if (md->mapTheme[0] == '+') {
        const linkedList_t* const ufos = md->ufos;
        const linkedList_t* const crafts = md->aircraft;
        if (ufos)
            cgi->Cvar_Set("rm_ufo", "%s",
                    cgi->Com_GetRandomMapAssemblyNameForCraft((const char*)ufos->data));
        if (crafts)
            cgi->Cvar_Set("rm_drop", "%s",
                    cgi->Com_GetRandomMapAssemblyNameForCraft((const char*)crafts->data));
    }
 
    if (md->teams)
        cgi->Cvar_SetValue("sv_maxteams", md->teams);
    else
        cgi->Cvar_SetValue("sv_maxteams", 2);
 
    cgi->Cmd_ExecuteString("map %s %s %s", cgi->Cvar_GetInteger("mn_serverday") ? "day" : "night", md->mapTheme, md->params ? (const char*)cgi->LIST_GetRandom(md->params) : "");
 
    cgi->UI_InitStack("multiplayer_wait", "missionoptions");
}

static void GAME_MP_Results (dbuffer* msg, int winner, int* numSpawned, int* numAlive, int numKilled[][MAX_TEAMS], int numStunned[][MAX_TEAMS], bool nextmap)
{
    /* HACK: Change to the main menu now so cgame shutdown won't kill the results screen by doing it later */
    cgi->UI_InitStack("main", "");
 
    linkedList_t* list = nullptr;
    int enemiesKilled = 0, enemiesStunned = 0;
    const int team = cgi->GAME_GetCurrentTeam();
 
    for (int i = 0; i < MAX_TEAMS; i++) {
        if (i == team)
            continue;
        enemiesKilled += numKilled[team][i];
        enemiesStunned += numStunned[team][i];
    }
 
    cgi->LIST_AddString(&list, va(_("Enemies killed:\t%i"), enemiesKilled + enemiesStunned));
    cgi->LIST_AddString(&list, va(_("Team survivors:\t%i"), numAlive[team]));
    cgi->UI_RegisterLinkedListText(TEXT_LIST2, list);
    if (winner == team) {
        cgi->UI_PushWindow("won");
    } else {
        cgi->UI_PushWindow("lost");
    }
}
 
static const mapDef_t* GAME_MP_MapInfo (int step)
{
    int i = 0;
    const char* gameType = cgi->Cvar_GetString("sv_gametype");
    for (;;) {
        i++;
        if (i > 100000)
            break;
 
        const mapDef_t* md = cgi->GAME_GetCurrentSelectedMap();
        if (md == nullptr)
            break;
        if (!md->multiplayer || !cgi->LIST_ContainsString(md->gameTypes, gameType)) {
            cgi->GAME_SwitchCurrentSelectedMap(step ? step : 1);
            continue;
        }
        linkedList_t* gameNames = nullptr;
        for (int j = 0; j < cgi->csi->numGTs; j++) {
            const gametype_t* gt = &cgi->csi->gts[j];
            if (cgi->LIST_ContainsString(md->gameTypes, gt->id)) {
                cgi->LIST_AddString(&gameNames, _(gt->name));
            }
        }
        cgi->UI_RegisterLinkedListText(TEXT_LIST2, gameNames);
        cgi->Cvar_SetValue("ai_singleplayeraliens", md->maxAliens);
 
        return md;
    }
 
    cgi->Com_Printf("no multiplayer map found for the current selected gametype: '%s'", gameType);
    return nullptr;
}

static void GAME_MP_UpdateGametype_f (void)
{
    const int numGTs = cgi->csi->numGTs;
    /* no types defined or parsed */
    if (numGTs == 0)
        return;
 
    cgi->Com_SetGameType();
 
    const char* gameType = cgi->Cvar_GetString("sv_gametype");
    const mapDef_t* md = cgi->GAME_GetCurrentSelectedMap();
    if (md != nullptr && md->multiplayer && cgi->LIST_ContainsString(md->gameTypes, gameType)) {
        /* no change needed, gametype is supported */
        return;
    }
 
    GAME_MP_MapInfo(1);
}
 
static linkedList_t* mp_chatMessageStack = nullptr;

static void GAME_MP_AddChatMessage (const char* text)
{
    char message[2048];
    Q_strncpyz(message, text, sizeof(message));
 
    const char* msg = Com_Trim(message);
    cgi->LIST_AddString(&mp_chatMessageStack, msg);
    cgi->HUD_DisplayMessage(msg);
    cgi->UI_RegisterLinkedListText(TEXT_CHAT_WINDOW, mp_chatMessageStack);
    cgi->UI_TextScrollEnd("hud_chat.allchats.chatscreen.chat");
}
 
static bool GAME_MP_HandleServerCommand (const char* command, dbuffer* msg)
{
    if (Q_streq(command, SV_CMD_TEAMINFO)) {
        GAME_MP_ParseTeamInfoMessage(msg);
        return true;
    }
 
    return false;
}
 
static const cmdList_t multiplayerCmds[] = {
    {"mp_startserver", GAME_MP_StartServer_f, nullptr},
    {"mp_updategametype", GAME_MP_UpdateGametype_f, "Update the menu values with current gametype values"},
    {nullptr, nullptr, nullptr}
};
static void GAME_MP_InitStartup (void)
{
    cgi->Cvar_ForceSet("sv_maxclients", "2");
    cgi->Cvar_Set("cl_equip", "multiplayer_initial");
 
    cgi->Cmd_TableAddList(multiplayerCmds);
    GAME_MP_CallbacksInit(cgi);
    GAME_MP_ServerListInit(cgi);
}
 
static void GAME_MP_Shutdown (void)
{
    cgi->Cmd_TableRemoveList(multiplayerCmds);
    GAME_MP_CallbacksShutdown();
    GAME_MP_ServerListShutdown();
 
    cgi->SV_Shutdown("Game mode shutdown", false);
 
    OBJZERO(teamData);
}
 
static void GAME_MP_RunFrame (float secondsSinceLastFrame)
{
    if (!cgi->Com_ServerState() && cgi->CL_GetClientState() < ca_connected && Q_strnull(cgi->Cvar_GetString("rcon_address")))
        return;
 
    if (rcon_client_password->modified) {
        rcon_client_password->modified = false;
        if (!cgi->Com_ServerState() && Q_strnull(rcon_client_password->string)) {
            cgi->UI_ExecuteConfunc("multiplayer_admin_panel 0");
        } else {
            cgi->UI_ExecuteConfunc("multiplayer_admin_panel 1");
        }
    }
 
    cvar_t* cvars[] = {cl_maxsoldiersperteam, cl_maxsoldiersperplayer, cl_roundtimelimit};
    for (int i = 0; i < lengthof(cvars); i++) {
        if (!cvars[i]->modified) {
            continue;
        }
        cvars[i]->modified = false;
        if (!cgi->Com_ServerState()) {
            cgi->Cmd_ExecuteString(SV_CMD_RCON " set %s %s", cvars[i]->name, cvars[i]->string);
        }
    }
}
 
#ifndef HARD_LINKED_CGAME
const cgame_export_t* GetCGameAPI (const cgame_import_t* import)
#else
const cgame_export_t* GetCGameMultiplayerAPI (const cgame_import_t* import)
#endif
{
    static cgame_export_t e;
 
    OBJZERO(e);
 
    e.name = "Multiplayer mode";
    e.menu = "multiplayer";
    e.isMultiplayer = 1;
    e.Init = GAME_MP_InitStartup;
    e.Shutdown = GAME_MP_Shutdown;
    e.MapInfo = GAME_MP_MapInfo;
    e.Results = GAME_MP_Results;
    e.EndRoundAnnounce = GAME_MP_EndRoundAnnounce;
    e.StartBattlescape = GAME_MP_StartBattlescape;
    e.NotifyEvent = GAME_MP_NotifyEvent;
    e.AddChatMessage = GAME_MP_AddChatMessage;
    e.HandleServerCommand = GAME_MP_HandleServerCommand;
    e.RunFrame = GAME_MP_RunFrame;
 
    cgi = import;
 
    return &e;
}