File: player.h

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/*
 * Copyright (C) 2002-2003, 2006-2011 by the Widelands Development Team
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 */

#ifndef WL_LOGIC_PLAYER_H
#define WL_LOGIC_PLAYER_H

#include <memory>
#include <unordered_set>

#include "base/macros.h"
#include "graphic/color.h"
#include "logic/constants.h"
#include "logic/editor_game_base.h"
#include "logic/map_objects/tribes/building.h"
#include "logic/map_objects/tribes/constructionsite.h"
#include "logic/map_objects/tribes/tribe_descr.h"
#include "logic/map_objects/tribes/warehouse.h"
#include "logic/mapregion.h"
#include "logic/message_queue.h"
#include "logic/widelands.h"

// there are three arrays to be used by AI
// their size is defined here
// (all are of the same size)
constexpr int kAIDataSize = 8;

class Node;
namespace Widelands {

class Economy;
struct Path;
struct PlayerImmovable;
class Soldier;
class TrainingSite;
struct Flag;
class TribeDescr;
struct Road;
struct AttackController;

/**
 * Manage in-game aspects of players, such as tribe, team, fog-of-war, statistics,
 * messages (notification when a resource has been found etc.) and so on.
 *
 * Also provides functions for directly building player immovables; however,
 * from the UI and AI codes, those should only ever be issued indirectly via
 * \ref GameController and friends, so that replays and network games function
 * properly.
 */
class Player {
public:
	// hard-coded playercolors
	static const RGBColor Colors[MAX_PLAYERS];

	struct BuildingStats {
		bool is_constructionsite;
		Coords pos;
	};
	using BuildingStatsVector = std::vector<BuildingStats>;
	using PlayerBuildingStats = std::vector<BuildingStatsVector>;

	friend class EditorGameBase;
	friend struct GamePlayerInfoPacket;
	friend struct GamePlayerEconomiesPacket;
	friend struct GamePlayerAiPersistentPacket;
	friend class MapBuildingdataPacket;
	friend class MapPlayersViewPacket;
	friend class MapExplorationPacket;

	Player(EditorGameBase&,
	       PlayerNumber,
	       uint8_t initialization_index,
	       const TribeDescr& tribe,
	       const std::string& name);
	~Player();

	void allocate_map();

	const MessageQueue& messages() const {
		return messages_;
	}
	MessageQueue& messages() {
		return messages_;
	}

	/// Adds the message to the queue. Takes ownership of the message. Assumes
	/// that it has been allocated in a separate memory block (not as a
	/// component of an array or struct) with operator new, so that it can be
	/// deallocated with operator delete.
	MessageId add_message(Game&, Message&, bool popup = false);

	/// Like add_message, but if there has been a message from the same sender
	/// in the last timeout milliseconds in a radius r around the coordinates
	/// of m, the message deallocated instead.
	MessageId add_message_with_timeout(Game&, Message&, uint32_t timeout, uint32_t radius);

	/// Indicates that the object linked to the message has been removed
	/// from the game. This implementation deletes the message.
	void message_object_removed(MessageId mid) const;

	void set_message_status(const MessageId& id, Message::Status const status) {
		messages().set_message_status(id, status);
	}

	const EditorGameBase& egbase() const {
		return egbase_;
	}
	EditorGameBase& egbase() {
		return egbase_;
	}
	PlayerNumber player_number() const {
		return player_number_;
	}
	TeamNumber team_number() const {
		return team_number_;
	}
	const RGBColor& get_playercolor() const {
		return Colors[player_number_ - 1];
	}
	const TribeDescr& tribe() const {
		return tribe_;
	}

	const std::string& get_name() const {
		return name_;
	}
	void set_name(const std::string& name) {
		name_ = name;
	}
	void set_team_number(TeamNumber team);

	void create_default_infrastructure();

	NodeCaps get_buildcaps(const FCoords&) const;

	bool is_hostile(const Player&) const;

	// For cheating
	void set_see_all(bool const t) {
		see_all_ = t;
		view_changed_ = true;
	}
	bool see_all() const {
		return see_all_;
	}

	/// Data that are used and managed by AI. They are here to have it saved as a part of player's
	/// data
	struct AiPersistentState {
		AiPersistentState()
		   : initialized(0),  // zero here is important, it means "~first time"
		     colony_scan_area(0),
		     trees_around_cutters(0),
		     expedition_start_time(0),
		     ships_utilization(0),
		     no_more_expeditions(0),
		     last_attacked_player(0),
		     least_military_score(0),
		     target_military_score(0),
		     ai_personality_military_loneliness(0),
		     ai_personality_attack_margin(0),
		     ai_productionsites_ratio(0),
		     ai_personality_wood_difference(0),
		     ai_personality_early_militarysites(0),
		     last_soldier_trained(0) {
		}

		// Was initialized
		uint8_t initialized;
		uint32_t colony_scan_area;
		uint32_t trees_around_cutters;
		uint32_t expedition_start_time;
		int16_t
		   ships_utilization;  // 0-10000 to avoid floats, used for decision for building new ships
		uint8_t no_more_expeditions;
		int16_t last_attacked_player;
		int32_t least_military_score;
		int32_t target_military_score;
		int16_t ai_personality_military_loneliness;
		int32_t ai_personality_attack_margin;
		uint32_t ai_productionsites_ratio;
		int32_t ai_personality_wood_difference;
		uint32_t ai_personality_early_militarysites;
		uint32_t last_soldier_trained;
	} ai_data;

	AiPersistentState* get_mutable_ai_persistent_state() {
		return &ai_data;
	}

	/// Per-player field information.
	struct Field {
		Field()
		   : military_influence(0),
		     vision(0),
		     roads(0),
		     owner(0),
		     time_node_last_unseen(0),
		     border(0),
		     border_r(0),
		     border_br(0),
		     border_bl(0) {
			//  Must be initialized because the rendering code is accessing it
			//  even for triangles that the player does not see (it is the
			//  darkening that actually hides the ground from the user).
			terrains.d = terrains.r = 0;

			time_triangle_last_surveyed[0] = never();
			time_triangle_last_surveyed[1] = never();

			//  Initialized for debug purposes only.
			map_object_descr[0] = map_object_descr[1] = map_object_descr[2] = nullptr;
		}

		/// Military influence is exerted by buildings with the help of soldiers.
		/// When the first soldier enters a building, it starts to exert military
		/// influence on the nodes within its conquer radius. When a building
		/// starts to exert military influence, it adds influence values to the
		/// nodes. When the last soldier leaves the building, it stops to exert
		/// military influence. Then the same values are subtracted from the
		/// nodes. Adding and subtracting military influence values affects land
		/// ownership according to certain rules.
		///
		/// This is not saved/loaded. It is recalculated during the loading
		/// process by adding influence values to the nodes surrounding a
		/// building when the first soldier located in it is loaded.
		MilitaryInfluence military_influence;

		/// Indicates whether the player is currently seeing this node or has
		/// has ever seen it.
		///
		/// The value is
		///  0    if the player has never seen the node
		///  1    if the player does not currently see the node, but has seen it
		///       previously
		///  1+n  if the player currently sees the node, where n is the number of
		///       objects that can see the node.
		///
		/// Note a fundamental difference between seeing a node, and having
		/// knownledge about resources. A node is considered continuously seen by
		/// a player as long as it is within vision range of any person of that
		/// player. If something on the node changes, the game engine will inform
		/// that player about it. But resource knowledge is not continuous. It is
		/// instant (given at the time when the geological survey completes) and
		/// immediately starts aging. Mining implies geological surveying, so a
		/// player will be informed about resource changes that he causes himself
		/// by mining.
		///
		/// Buildings do not see on their own. Only people can see. But as soon
		/// as a person enters a building, the person stops seeing. If it is the
		/// only person in the building, the building itself starts to see (some
		/// buildings, such as fortresses usually see much further than persons
		/// standing on the ground). As soon as a person leaves a building, the
		/// person begins to see on its own. If the building becomes empty of
		/// people, it stops seeing.
		///
		/// Only the Boolean representation of this value (whether the node has
		/// ever been seen) is saved/loaded. The complete value is then obtained
		/// by the calls to see_node or see_area peformed by all the building and
		/// worker objects that can see the node.
		///
		/// \note Never change this variable directly. Instead, use the functions
		/// \ref see_node and \ref unsee_node or, more conveniently,
		/// \ref see_area and \ref unsee_area .
		Vision vision;

		//  Below follows information about the field, as far as this player
		//  knows.

		/**
		 * The terrain types of the 2 triangles, as far as this player knows.
		 * Each value is only valid when one of the corner nodes of the triangle
		 * has been seen.
		 */
		Widelands::Field::Terrains terrains;

		uint8_t roads;

		/**
		 * The owner of this node, as far as this player knows.
		 * Only valid when this player has seen this node.
		 */
		PlayerNumber owner;

		/**
		 * The amount of resource at each of the triangles, as far as this player
		 * knows.
		 * The d component is only valid when time_last_surveyed[0] != Never().
		 * The r component is only valid when time_last_surveyed[1] != Never().
		 */
		// TODO(unknown): Check this on access, at least in debug builds
		Widelands::Field::ResourceAmounts resource_amounts;

		/// Whether there is a road between this node and the node to the
		/// east, as far as this player knows.
		/// Only valid when this player has seen this node or the node to the
		/// east.
		uint8_t road_e() const {
			return roads & RoadType::kMask;
		}

		/// Whether there is a road between this node and the node to the
		/// southeast, as far as this player knows.
		/// Only valid when this player has seen this node or the node to the
		/// southeast.
		uint8_t road_se() const {
			return roads >> RoadType::kSouthEast & RoadType::kMask;
		}

		/// Whether there is a road between this node and the node to the
		/// southwest, as far as this player knows.
		/// Only valid when this player has seen this node or the node to the
		/// southwest.
		uint8_t road_sw() const {
			return roads >> RoadType::kSouthWest & RoadType::kMask;
		}

		/**
		 * The last time when this player surveyed the respective triangle
		 * geologically. Indexed by TCoords::TriangleIndex. A geologic survey is a
		 * thorough investigation. Therefore it is considered impossible to have
		 * knowledge about the resources of a triangle without having knowledge
		 * about each of the surrounding nodes:
		 *
		 *     geologic information about a triangle =>
		 *         each neighbouring node has been seen
		 *
		 * and the contrapositive:
		 *
		 *     some neighbouring node has never been seen =>
		 *         no geologic information about the triangle
		 *
		 * Is EditorGameBase::Never() when never surveyed.
		 */
		Time time_triangle_last_surveyed[2];

		/**
		 * The last time when this player saw this node.
		 * Only valid when \ref vision is 1, i.e. the player has previously seen
		 * this node but can't see it right now.
		 *
		 * This value is only for the node.
		 *
		 * The corresponding value for a triangle between the nodes A, B and C is
		 *   max
		 *     (time_node_last_unseen for A,
		 *      time_node_last_unseen for B,
		 *      time_node_last_unseen for C)
		 * and is only valid if all of {A, B, C} are currently not seen
		 * (i.e. \ref vision <= 1)
		 * and at least one of them has been seen at least once
		 * (i.e. \ref vision == 1).
		 *
		 * The corresponding value for an edge between the nodes A and B is
		 *   max(time_node_last_unseen for A, time_node_last_unseen for B)
		 * and is only valid if all of {A, B} are currently not seen and at
		 * least one of them has been seen at least once.
		 *
		 */
		Time time_node_last_unseen;

		/**
		 * The type of immovable on this node, as far as this player knows.
		 * Only valid when the player has seen this node (or maybe a nearby node
		 * if the immovable is big?). (Roads are not stored here.)
		 */
		const MapObjectDescr* map_object_descr[3];

		/// Information for constructionsite's animation.
		/// only valid, if there is a constructionsite on this node
		ConstructionsiteInformation constructionsite;

		/// Save whether the player saw a border the last time (s)he saw the node.
		bool border;
		bool border_r;
		bool border_br;
		bool border_bl;

		//  Summary of intended layout (not yet fully implemented)
		//
		//                                  32bit arch    64bit arch
		//                                 ============  ============
		//  Identifier                     offset  size  offset  size
		//  =======================        ======  ====  ======  ====
		//  military_influence              0x000  0x10   0x000  0x10
		//  vision                          0x010  0x10   0x010  0x10
		//  terrains                        0x020  0x08   0x020  0x08
		//  roads                           0x028  0x06   0x028  0x06
		//  owner_d                         0x02e  0x05   0x02e  0x05
		//  owner_r                         0x033  0x05   0x033  0x05
		//  resource_amounts                0x038  0x08   0x038  0x08
		//  time_triangle_last_surveyed[0]  0x040  0x20   0x040  0x20
		//  time_triangle_last_surveyed[1]  0x060  0x20   0x060  0x20
		//  time_node_last_unseen           0x080  0x20   0x080  0x20
		//  map_object_descr[0]             0x0a0  0x20   0x0a0  0x40
		//  map_object_descr[1]             0x0c0  0x20   0x0e0  0x40
		//  map_object_descr[2]             0x0e0  0x20   0x120  0x40
		//  ConstructionsiteInformation
		//  border
		//  border_r
		//  border_br
		//  border_bl
		//  <end>                           0x100         0x160

	private:
		DISALLOW_COPY_AND_ASSIGN(Field);
	};

	const Field* fields() const {
		return fields_;
	}

	// See area
	Vision vision(MapIndex const i) const {
		// Node visible if > 1
		return (see_all_ ? 2 : 0) + fields_[i].vision;
	}

	bool has_view_changed() {
		bool t = view_changed_;
		view_changed_ = false;
		return t;
	}

	/**
	 * Update this player's information about this node and the surrounding
	 * triangles and edges.
	 */
	void see_node(const Map&,
	              const Widelands::Field& first_map_field,
	              const FCoords&,
	              const Time,
	              const bool forward = false);

	/// Decrement this player's vision for a node.
	void unsee_node(const MapIndex, const Time, const bool forward = false);

	/// Call see_node for each node in the area.
	void see_area(const Area<FCoords>& area) {
		const Time gametime = egbase().get_gametime();
		const Map& map = egbase().map();
		const Widelands::Field& first_map_field = map[0];
		MapRegion<Area<FCoords>> mr(map, area);
		do {
			see_node(map, first_map_field, mr.location(), gametime);
		} while (mr.advance(map));
		view_changed_ = true;
	}

	/// Decrement this player's vision for each node in an area.
	void unsee_area(const Area<FCoords>& area) {
		const Time gametime = egbase().get_gametime();
		const Map& map = egbase().map();
		const Widelands::Field& first_map_field = map[0];
		MapRegion<Area<FCoords>> mr(map, area);
		do
			unsee_node(mr.location().field - &first_map_field, gametime);
		while (mr.advance(map));
		view_changed_ = true;
	}

	MilitaryInfluence military_influence(MapIndex const i) const {
		return fields_[i].military_influence;
	}

	MilitaryInfluence& military_influence(MapIndex const i) {
		return fields_[i].military_influence;
	}

	bool is_worker_type_allowed(const DescriptionIndex& i) const {
		return allowed_worker_types_.at(i);
	}
	void allow_worker_type(DescriptionIndex, bool allow);

	// Allowed buildings
	bool is_building_type_allowed(const DescriptionIndex& i) const {
		return allowed_building_types_[i];
	}
	void allow_building_type(DescriptionIndex, bool allow);

	// Player commands
	// Only to be called indirectly via CmdQueue
	Flag& force_flag(const FCoords&);  /// Do what it takes to create the flag.
	Flag* build_flag(const Coords&);   /// Build a flag if it is allowed.
	Road& force_road(const Path&);
	Road* build_road(const Path&);  /// Build a road if it is allowed.
	Building& force_building(Coords, const Building::FormerBuildings&);
	Building& force_csite(Coords,
	                      DescriptionIndex,
	                      const Building::FormerBuildings& = Building::FormerBuildings());
	Building* build(Coords, DescriptionIndex, bool, Building::FormerBuildings&);
	void bulldoze(PlayerImmovable&, bool recurse = false);
	void flagaction(Flag&);
	void start_stop_building(PlayerImmovable&);
	void military_site_set_soldier_preference(PlayerImmovable&, uint8_t soldier_preference);
	void start_or_cancel_expedition(Warehouse&);
	void enhance_building(Building*, DescriptionIndex index_of_new_building);
	void dismantle_building(Building*);

	// Economy stuff
	void add_economy(Economy&);
	void remove_economy(Economy&);
	bool has_economy(Economy&) const;
	using Economies = std::vector<Economy*>;
	Economies::size_type get_economy_number(Economy const*) const;
	Economy* get_economy_by_number(Economies::size_type const i) const {
		return economies_[i];
	}
	uint32_t get_nr_economies() const {
		return economies_.size();
	}

	// Military stuff
	void drop_soldier(PlayerImmovable&, Soldier&);
	void change_training_options(TrainingSite&, TrainingAttribute attr, int32_t val);

	uint32_t find_attack_soldiers(Flag&,
	                              std::vector<Soldier*>* soldiers = nullptr,
	                              uint32_t max = std::numeric_limits<uint32_t>::max());
	void enemyflagaction(Flag&, PlayerNumber attacker, uint32_t count);

	uint32_t casualties() const {
		return casualties_;
	}
	uint32_t kills() const {
		return kills_;
	}
	uint32_t msites_lost() const {
		return msites_lost_;
	}
	uint32_t msites_defeated() const {
		return msites_defeated_;
	}
	uint32_t civil_blds_lost() const {
		return civil_blds_lost_;
	}
	uint32_t civil_blds_defeated() const {
		return civil_blds_defeated_;
	}
	void count_casualty() {
		++casualties_;
	}
	void count_kill() {
		++kills_;
	}
	void count_msite_lost() {
		++msites_lost_;
	}
	void count_msite_defeated() {
		++msites_defeated_;
	}
	void count_civil_bld_lost() {
		++civil_blds_lost_;
	}
	void count_civil_bld_defeated() {
		++civil_blds_defeated_;
	}

	// Statistics
	const BuildingStatsVector& get_building_statistics(const DescriptionIndex& i) const;

	std::vector<uint32_t> const* get_ware_production_statistics(DescriptionIndex const) const;

	std::vector<uint32_t> const* get_ware_consumption_statistics(DescriptionIndex const) const;

	std::vector<uint32_t> const* get_ware_stock_statistics(DescriptionIndex const) const;

	void read_statistics(FileRead&);
	void write_statistics(FileWrite&) const;
	void read_remaining_shipnames(FileRead&);
	void write_remaining_shipnames(FileWrite&) const;
	void sample_statistics();
	void ware_produced(DescriptionIndex);

	void ware_consumed(DescriptionIndex, uint8_t);
	void next_ware_production_period();

	void set_ai(const std::string&);
	const std::string& get_ai() const;

	// used in shared kingdom mode
	void add_further_starting_position(uint8_t plr, uint8_t init) {
		further_shared_in_player_.push_back(plr);
		further_initializations_.push_back(init);
	}

	const std::string pick_shipname();

private:
	BuildingStatsVector* get_mutable_building_statistics(const DescriptionIndex& i);
	void update_building_statistics(Building&, NoteImmovable::Ownership ownership);
	void update_team_players();
	void play_message_sound(const Message::Type& msgtype);
	void enhance_or_dismantle(Building*, DescriptionIndex index_of_new_building);

	// Called when a node becomes seen or has changed.  Discovers the node and
	// those of the 6 surrounding edges/triangles that are not seen from another
	// node.
	void rediscover_node(const Map&, const Widelands::Field&, const FCoords&);

	std::unique_ptr<Notifications::Subscriber<NoteImmovable>> immovable_subscriber_;
	std::unique_ptr<Notifications::Subscriber<NoteFieldTerrainChanged>>
	   field_terrain_changed_subscriber_;

	MessageQueue messages_;

	EditorGameBase& egbase_;
	uint8_t initialization_index_;
	std::vector<uint8_t> further_initializations_;   // used in shared kingdom mode
	std::vector<uint8_t> further_shared_in_player_;  //  ''  ''   ''     ''     ''
	TeamNumber team_number_;
	std::vector<Player*> team_player_;
	bool team_player_uptodate_;
	bool see_all_;
	bool view_changed_;
	const PlayerNumber player_number_;
	const TribeDescr& tribe_;  // buildings, wares, workers, sciences
	uint32_t casualties_, kills_;
	uint32_t msites_lost_, msites_defeated_;
	uint32_t civil_blds_lost_, civil_blds_defeated_;
	std::unordered_set<std::string> remaining_shipnames_;

	Field* fields_;
	std::vector<bool> allowed_worker_types_;
	std::vector<bool> allowed_building_types_;
	Economies economies_;
	std::string name_;  // Player name
	std::string ai_;    /**< Name of preferred AI implementation */

	/**
	 * Wares produced (by ware id) since the last call to @ref sample_statistics
	 */
	std::vector<uint32_t> current_produced_statistics_;

	/**
	 * Wares consumed (by ware id) since the last call to @ref sample_statistics
	 */
	std::vector<uint32_t> current_consumed_statistics_;

	/**
	 * Statistics of wares produced over the life of the game, indexed as
	 * ware_productions_[ware id][time index]
	 */
	std::vector<std::vector<uint32_t>> ware_productions_;

	/**
	 * Statistics of wares consumed over the life of the game, indexed as
	 * ware_consumptions_[ware_id][time_index]
	 */
	std::vector<std::vector<uint32_t>> ware_consumptions_;

	/**
	 * Statistics of wares stored inside of warehouses over the
	 * life of the game, indexed as
	 * ware_stocks_[ware_id][time_index]
	 */
	std::vector<std::vector<uint32_t>> ware_stocks_;

	PlayerBuildingStats building_stats_;

	DISALLOW_COPY_AND_ASSIGN(Player);
};

void find_former_buildings(const Tribes& tribes,
                           const DescriptionIndex bi,
                           Building::FormerBuildings* former_buildings);
}

#endif  // end of include guard: WL_LOGIC_PLAYER_H