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/* |
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* This file is part of Araknemu. |
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* |
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* Araknemu is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* Araknemu is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with Araknemu. If not, see <https://www.gnu.org/licenses/>. |
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* |
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* Copyright (c) 2017-2021 Vincent Quatrevieux |
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*/ |
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package fr.quatrevieux.araknemu.game.fight.ai.util; |
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import fr.arakne.utils.maps.CoordinateCell; |
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import fr.arakne.utils.value.Interval; |
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import fr.quatrevieux.araknemu.game.fight.ai.AI; |
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import fr.quatrevieux.araknemu.game.fight.fighter.FighterData; |
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import fr.quatrevieux.araknemu.game.fight.map.BattlefieldCell; |
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import java.util.Comparator; |
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import java.util.Objects; |
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import java.util.Optional; |
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import java.util.function.Predicate; |
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import java.util.stream.Stream; |
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/** |
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* Utility class for perform operations on fighters |
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* |
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* @see AIHelper#enemies() |
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* @see AIHelper#allies() |
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*/ |
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public final class FightersHelper { |
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private final AIHelper helper; |
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private final AI ai; |
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private final Predicate<FighterData> filter; |
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FightersHelper(AIHelper helper, AI ai, Predicate<FighterData> filter) { |
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this.helper = helper; |
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this.ai = ai; |
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this.filter = filter; |
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} |
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/** |
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* Get a stream of all alive fighters which match with filter given at constructor |
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* |
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* @return Stream of fighters |
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*/ |
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public Stream<? extends FighterData> stream() { |
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return ai.fighters().filter(filter); |
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} |
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/** |
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* Get fighters adjacent to the given cell |
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* |
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* @param cell Cell to check |
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* |
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* @return Stream of fighters |
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* |
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* @see CellsHelper#adjacent(BattlefieldCell) |
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*/ |
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@SuppressWarnings("methodref.return") // BattlefieldCell::fighter return a nullable fighter |
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public Stream<FighterData> adjacent(BattlefieldCell cell) { |
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return helper.cells().adjacent(cell) |
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.map(BattlefieldCell::fighter) |
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.filter(Objects::nonNull) |
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.filter(fighter -> !fighter.hidden()) |
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.filter(filter) |
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; |
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} |
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/** |
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* Get fighters adjacent to the current cell |
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* Note: if there is at lease one adjacent enemy, the current fighter can be tackled |
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* |
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* @return Stream of fighters |
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* |
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* @see CellsHelper#adjacent() |
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*/ |
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public Stream<FighterData> adjacent() { |
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return adjacent(ai.fighter().cell()); |
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} |
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/** |
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* Get the nearest fighter |
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* If multiple fighters have the same distance, the fighter with lower HP will be returned |
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* |
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* @return The nearest fighter |
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*/ |
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public Optional<? extends FighterData> nearest() { |
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final CoordinateCell<BattlefieldCell> currentCell = ai.fighter().cell().coordinate(); |
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return stream() |
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.filter(fighter -> !fighter.hidden()) |
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.min(Comparator |
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.<FighterData>comparingInt(f -> currentCell.distance(f.cell())) |
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.thenComparingInt(f -> f.life().current()) |
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) |
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; |
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} |
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/** |
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* Get cells of all fighters |
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* |
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* @return Stream of cells |
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*/ |
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public Stream<BattlefieldCell> cells() { |
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return stream().filter(fighter -> !fighter.hidden()).map(FighterData::cell); |
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} |
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/** |
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* Get all fighters which are in the given range |
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* |
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* @param range Range to check |
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* |
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* @return Stream of fighters |
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*/ |
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public Stream<? extends FighterData> inRange(Interval range) { |
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final CoordinateCell<BattlefieldCell> currentCell = ai.fighter().cell().coordinate(); |
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return stream().filter(fighter -> !fighter.hidden()).filter(fighter -> range.contains(currentCell.distance(fighter.cell()))); |
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} |
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/** |
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* Get the count of fighters which match with the filter given at constructor |
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* |
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* @return Number of fighters |
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*/ |
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public int count() { |
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return (int) stream().count(); |
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} |
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} |
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Arakne /
Araknemu
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