add $stat for live ep3 battle stats

README.md

@@ -154,6 +154,7 @@ All quests, including those originally in GCI or DLQ format, are treated as onli
 
 The following Episode 3 features work well:
 * CARD battles. Not every combination of abilities has been tested yet, so if you find a feature or card ability that doesn't work like it's supposed to, please make a GitHub issue and describe the situation (the attacking card(s), defending card(s), and ability or condition that didn't work).
+* Spectator teams.
 * Tournaments. (But they don't work like Sega's tournaments did - see below)
 * Downloading quests.
 * Trading cards.
@@ -161,7 +162,6 @@ The following Episode 3 features work well:
 
 The following Episode 3 features are implemented, but are only partially tested:
 * Decorations in lobbies. Currently only images are supported; the game also supports loading custom 3D models in lobbies, but newserv does not implement this (yet).
-* Spectator teams. There is a known issue that prevents viewing battles unless you're in the spectator team when the battle begins, and spectating clients sometimes crash for an unknown reason.
 * Battle replays also sometimes cause the client to crash during the replay. Using the $playrec command is therefore not recommended.
 
 Tournaments work differently than they did on Sega's servers. Tournaments can be created with the `create-tournament` shell command, which enables players to register for them. (Use `help` to see all the arguments - there are many!) The `start-tournament` shell command starts the tournament (and prevents further registrations), but this doesn't schedule any matches. Instead, players who are ready to play their next match can all stand at the 4-player battle table near the lobby warp in the same CARD lobby, and the tournament match will start automatically.
@@ -287,6 +287,7 @@ Some commands only work on the game server and not on the proxy server. The chat
 * Episode 3 commands (game server only)
     * `$spec`: Toggles the allow spectators flag for Episode 3 games. If any players are spectating when this flag is disabled, they will be sent back to the lobby.
     * `$inftime`: Toggles infinite-time mode. Must be used before starting a battle. If infinite-time mode is enabled, the overall and per-phase time limits will be disabled regardless of the values chosen during battle setup. After completing a battle, infinite-time mode is reset to the server's default value (which can be set in Episode3BehaviorFlags in config.json).
+    * `$stat <what>`: Shows a statistic about your player or team in the current battle. `<what>` can be `duration`, `fcs-destroyed`, `cards-destroyed`, `damage-given`, `damage-taken`, `opp-cards-destroyed`, `own-cards-destroyed`, `move-distance`, `cards-set`, `fcs-set`, `attack-actions-set`, `techs-set`, `assists-set`, `defenses-self`, `defenses-ally`, `cards-drawn`, `max-attack-damage`, `max-combo`, `attacks-given`, `attacks-taken`, `sc-damage`, `damage-defended`, or `rank`.
     * `$surrender`: Causes your team to immediately lose the current battle.
     * `$saverec <name>`: Saves the recording of the last battle.
     * `$playrec <name>`: Plays a battle recording. This command creates a spectator team and replays the specified battle log within it. There is a known issue which causes spectators to crash in some cases, so use of this command is currently not recommended.

src/ChatCommands.cc

@@ -1326,6 +1326,90 @@ static void server_command_surrender(shared_ptr<Client> c, const std::u16string&
   l->ep3_server->force_battle_result(c->lobby_client_id, false);
 }
 
+static void server_command_get_ep3_battle_stat(shared_ptr<Client> c, const std::u16string& args) {
+  auto l = c->require_lobby();
+  check_is_game(l, true);
+  check_is_ep3(c, true);
+  if (l->episode != Episode::EP3) {
+    throw logic_error("non-Ep3 client in Ep3 game");
+  }
+  if (!l->ep3_server) {
+    send_text_message(c, u"$C6Episode 3 server\nis not initialized");
+    return;
+  }
+  if (l->ep3_server->setup_phase != Episode3::SetupPhase::MAIN_BATTLE) {
+    send_text_message(c, u"$C6Battle has not\nyet started");
+    return;
+  }
+  if (c->lobby_client_id >= 4) {
+    throw logic_error("client ID is too large");
+  }
+  auto ps = l->ep3_server->player_states[c->lobby_client_id];
+  if (!ps) {
+    send_text_message(c, u"$C6Player is missing");
+    return;
+  }
+  uint8_t team_id = ps->get_team_id();
+  if (team_id > 1) {
+    throw logic_error("team ID is incorrect");
+  }
+
+  string what = encode_sjis(args);
+  if (what == "rank") {
+    float score = ps->stats.score(l->ep3_server->get_round_num());
+    uint8_t rank = ps->stats.rank_for_score(score);
+    const char* rank_name = ps->stats.name_for_rank(rank);
+    send_text_message_printf(c, "$C7Score: %g\nRank: %hhu (%s)", score, rank, rank_name);
+  } else if (what == "duration") {
+    string s = format_duration(now() - l->ep3_server->battle_start_usecs);
+    send_text_message_printf(c, "$C7Duration: %s", s.c_str());
+  } else if (what == "fcs-destroyed") {
+    send_text_message_printf(c, "$C7Team FCs destroyed:\n%" PRIu32, l->ep3_server->team_num_ally_fcs_destroyed[team_id]);
+  } else if (what == "cards-destroyed") {
+    send_text_message_printf(c, "$C7Team cards destroyed:\n%" PRIu32, l->ep3_server->team_num_cards_destroyed[team_id]);
+  } else if (what == "damage-given") {
+    send_text_message_printf(c, "$C7Damage given: %hu", ps->stats.damage_given.load());
+  } else if (what == "damage-taken") {
+    send_text_message_printf(c, "$C7Damage taken: %hu", ps->stats.damage_taken.load());
+  } else if (what == "opp-cards-destroyed") {
+    send_text_message_printf(c, "$C7Opp. cards destroyed:\n%hu", ps->stats.num_opponent_cards_destroyed.load());
+  } else if (what == "own-cards-destroyed") {
+    send_text_message_printf(c, "$C7Own cards destroyed:\n%hu", ps->stats.num_owned_cards_destroyed.load());
+  } else if (what == "move-distance") {
+    send_text_message_printf(c, "$C7Move distance: %hu", ps->stats.total_move_distance.load());
+  } else if (what == "cards-set") {
+    send_text_message_printf(c, "$C7Cards set: %hu", ps->stats.num_cards_set.load());
+  } else if (what == "fcs-set") {
+    send_text_message_printf(c, "$C7FC cards set: %hu", ps->stats.num_item_or_creature_cards_set.load());
+  } else if (what == "attack-actions-set") {
+    send_text_message_printf(c, "$C7Attack actions set:\n%hu", ps->stats.num_attack_actions_set.load());
+  } else if (what == "techs-set") {
+    send_text_message_printf(c, "$C7Techs set: %hu", ps->stats.num_tech_cards_set.load());
+  } else if (what == "assists-set") {
+    send_text_message_printf(c, "$C7Assists set: %hu", ps->stats.num_assist_cards_set.load());
+  } else if (what == "defenses-self") {
+    send_text_message_printf(c, "$C7Defenses on self:\n%hu", ps->stats.defense_actions_set_on_self.load());
+  } else if (what == "defenses-ally") {
+    send_text_message_printf(c, "$C7Defenses on ally:\n%hu", ps->stats.defense_actions_set_on_ally.load());
+  } else if (what == "cards-drawn") {
+    send_text_message_printf(c, "$C7Cards drawn: %hu", ps->stats.num_cards_drawn.load());
+  } else if (what == "max-attack-damage") {
+    send_text_message_printf(c, "$C7Maximum attack damage:\n%hu", ps->stats.max_attack_damage.load());
+  } else if (what == "max-combo") {
+    send_text_message_printf(c, "$C7Longest combo: %hu", ps->stats.max_attack_combo_size.load());
+  } else if (what == "attacks-given") {
+    send_text_message_printf(c, "$C7Attacks given: %hu", ps->stats.num_attacks_given.load());
+  } else if (what == "attacks-taken") {
+    send_text_message_printf(c, "$C7Attacks taken: %hu", ps->stats.num_attacks_taken.load());
+  } else if (what == "sc-damage") {
+    send_text_message_printf(c, "$C7SC damage taken: %hu", ps->stats.sc_damage_taken.load());
+  } else if (what == "damage-defended") {
+    send_text_message_printf(c, "$C7Damage defended: %hu", ps->stats.action_card_negated_damage.load());
+  } else {
+    send_text_message(c, u"$C6Unknown statistic");
+  }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 
 typedef void (*server_handler_t)(shared_ptr<Client> c, const std::u16string& args);
@@ -1374,6 +1458,7 @@ static const unordered_map<u16string, ChatCommandDefinition> chat_commands({
     {u"$song", {server_command_song, proxy_command_song}},
     {u"$spec", {server_command_toggle_spectator_flag, nullptr}},
     {u"$ss", {nullptr, proxy_command_send_server}},
+    {u"$stat", {server_command_get_ep3_battle_stat, nullptr}},
     {u"$surrender", {server_command_surrender, nullptr}},
     {u"$swa", {server_command_switch_assist, proxy_command_switch_assist}},
     {u"$unset", {server_command_ep3_unset_field_character, nullptr}},