feat(events): read EventGating and run the Crux Prime pirateDay loads

EventGating (eventName, date_start, date_end; 8 rows) is only in the
CDClient for the server: the 1.10.64 client has no string for it. The
dates are Unix times (UTC), inclusive: pirateDay 2011-09-19 00:00 to
2011-09-20 23:59:59 (Talk Like a Pirate Day), buildNexusTower 2010-03-09
to 2011-03-14, buildNexusTowerEnd, frostburgh2010_notused and test rows.
The live Lua asked for an event with GetHolidayEvent{eventToCheck =
name}.isValid; the only callers are the Crux Prime random spawners
(L_BASE_RANDOM_SPAWNER.lua, L_AM_ZONE_SERVER.lua), whose only event is
pirateDay. DLU's BaseRandomServer::CheckEvents was a TODO.

- CDEventGatingTable loads the table; HolidayEvents::IsActive(name) is
  true while the dates include now, or when event_1..event_8 names the
  event (every live date is in 2010/2011, so this is how a server turns
  one on; the same settings already switch gatingOnFeature objects).
- BaseRandomServer::CheckEvents: during pirateDay the str and zip areas
  use the event loads from the Lua (80%: 5 pirates on each of type1-3,
  20%: 5 admirals each; multipliers secA 1, secB 1, secC 1.2 for str).
  Inferred: every spawner's Lua put the whole {str, zip} table in its
  zones, which its getRandomLoad walks with ipairs and so finds no load;
  DLU uses each table for the area it names, as L_AM_ZONE_SERVER.lua's
  layout intends.
- sharedconfig.ini says event_N also takes EventGating names.

Check in game: with event_2=pirateDay in sharedconfig.ini, the Crux Prime
areas filled by the str and zip random spawners (spawner networks
em_str_* and em_zip_*) spawn only Maelstrom pirates and admirals; the
other two areas and a server without the setting spawn the usual mix.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dGame/dUtilities/CMakeLists.txt

@@ -7,6 +7,7 @@ set(DGAME_DUTILITIES_SOURCES "BrickDatabase.cpp"
 	"DashboardNotify.cpp"
 	"GUID.cpp"
 	"LiveEvents.cpp"
+	"HolidayEvents.cpp"
 	"Contraband.cpp"
 	"PropertyBuilders.cpp"
 	"PropertyRent.cpp"

dGame/dUtilities/HolidayEvents.cpp

@@ -0,0 +1,29 @@
+#include "HolidayEvents.h"
+
+#include "CDClientManager.h"
+#include "CDEventGatingTable.h"
+#include "dConfig.h"
+#include "Game.h"
+
+#include <array>
+#include <ctime>
+#include <string>
+
+bool HolidayEvents::IsActive(const std::string_view eventName, const int64_t unixTime, const std::string_view* enabledEvents, const size_t enabledCount) {
+	if (eventName.empty()) return false;
+	for (size_t i = 0; i < enabledCount; i++) {
+		if (enabledEvents[i] == eventName) return true;
+	}
+	return CDClientManager::GetTable<CDEventGatingTable>()->IsEventActive(eventName, unixTime);
+}
+
+bool HolidayEvents::IsActive(const std::string_view eventName) {
+	static constexpr std::array<const char*, 8> KEYS = { "event_1", "event_2", "event_3", "event_4", "event_5", "event_6", "event_7", "event_8" };
+	std::array<std::string, 8> settings;
+	std::array<std::string_view, 8> enabled;
+	for (size_t i = 0; i < KEYS.size(); i++) {
+		settings[i] = Game::config ? Game::config->GetValue(KEYS[i]) : "";
+		enabled[i] = settings[i];
+	}
+	return IsActive(eventName, static_cast<int64_t>(std::time(nullptr)), enabled.data(), enabled.size());
+}

dGame/dUtilities/HolidayEvents.h

@@ -0,0 +1,22 @@
+#ifndef HOLIDAYEVENTS_H
+#define HOLIDAYEVENTS_H
+
+#include <cstdint>
+#include <string_view>
+
+/**
+ * Holiday events from the server-only EventGating table, as server scripts asked for them
+ * (GetHolidayEvent{eventToCheck}.isValid in the live Lua).
+ */
+namespace HolidayEvents {
+	/**
+	 * Whether an event runs: its EventGating dates include now, or the server's event_1..event_8 setting names it (the
+	 * live dates are all in 2010 and 2011, so this is how a server turns one on)
+	 */
+	bool IsActive(std::string_view eventName);
+
+	// The same at a given Unix time, with the event_N settings passed in
+	bool IsActive(std::string_view eventName, int64_t unixTime, const std::string_view* enabledEvents, size_t enabledCount);
+}
+
+#endif // HOLIDAYEVENTS_H