mirror of
https://github.com/Minestom/Minestom.git
synced 2024-09-27 06:03:01 +02:00
19bb23fe3d
Signed-off-by: TheMode <themode@outlook.fr>
362 lines
14 KiB
Java
362 lines
14 KiB
Java
package net.minestom.server.event;
|
|
|
|
import net.minestom.server.event.trait.CancellableEvent;
|
|
import net.minestom.server.tag.Tag;
|
|
import net.minestom.server.tag.TagReadable;
|
|
import org.jetbrains.annotations.ApiStatus;
|
|
import org.jetbrains.annotations.Contract;
|
|
import org.jetbrains.annotations.NotNull;
|
|
import org.jetbrains.annotations.Nullable;
|
|
|
|
import java.util.List;
|
|
import java.util.Set;
|
|
import java.util.function.BiPredicate;
|
|
import java.util.function.Consumer;
|
|
import java.util.function.Predicate;
|
|
|
|
/**
|
|
* Represents a single node in an event graph.
|
|
* <p>
|
|
* A node may contain any number of children and/or listeners. When an event is called,
|
|
* the node will filter it based on the parameters given at creation and then propagate
|
|
* it down to child nodes and listeners if it passes.
|
|
*
|
|
* @param <T> The event type accepted by this node
|
|
*/
|
|
public sealed interface EventNode<T extends Event> permits EventNodeImpl {
|
|
|
|
/**
|
|
* Creates an event node which accepts any event type with no filtering.
|
|
*
|
|
* @param name The name of the node
|
|
* @return An event node with no filtering
|
|
*/
|
|
@Contract(value = "_ -> new", pure = true)
|
|
static @NotNull EventNode<Event> all(@NotNull String name) {
|
|
return type(name, EventFilter.ALL);
|
|
}
|
|
|
|
/**
|
|
* Creates an event node which accepts any event of the given type. The type is provided
|
|
* by the {@link EventFilter}.
|
|
* <p>
|
|
* For example, you could create an event filter which only accepts player events with the following
|
|
* <p><pre>
|
|
* var playerEventNode = EventNode.type("demo", EventFilter.PLAYER);
|
|
* </pre>
|
|
*
|
|
* @param name The name of the event node
|
|
* @param filter The event type filter to apply
|
|
* @param <E> The resulting event type of the node
|
|
* @return A node with just an event type filter
|
|
*/
|
|
@Contract(value = "_, _ -> new", pure = true)
|
|
static <E extends Event, V> @NotNull EventNode<E> type(@NotNull String name,
|
|
@NotNull EventFilter<E, V> filter) {
|
|
return create(name, filter, null);
|
|
}
|
|
|
|
/**
|
|
* Creates an event node which accepts any event of the given type which passes
|
|
* the provided condition. The condition is based on the event object itself.
|
|
* <p>
|
|
* For example, you could create an event filter which only accepts player events
|
|
* where the player is in the pos x/z quadrant of the world.
|
|
* <p><pre>{@code
|
|
* var playerInPosXZNode = EventNode.event("abc", EventFilter.PLAYER, event -> {
|
|
* var position = event.getPlayer().getPosition();
|
|
* return position.getX() > 0 && position.getZ() > 0;
|
|
* });
|
|
* }</pre>
|
|
*
|
|
* @param name The name of the event node
|
|
* @param filter The event type filter to apply
|
|
* @param predicate The event condition
|
|
* @param <E> The resulting event type of the node
|
|
* @return A node with an event type filter as well as a condition on the event.
|
|
*/
|
|
@Contract(value = "_, _, _ -> new", pure = true)
|
|
static <E extends Event, V> @NotNull EventNode<E> event(@NotNull String name,
|
|
@NotNull EventFilter<E, V> filter,
|
|
@NotNull Predicate<E> predicate) {
|
|
return create(name, filter, (e, h) -> predicate.test(e));
|
|
}
|
|
|
|
/**
|
|
* Creates an event node which accepts any event of the given type which passes
|
|
* the provided condition. The condition is based on the event object as well as
|
|
* the event handler type defined in the {@link EventFilter}.
|
|
* <p>
|
|
* For example, you could create an event filter which only accepts player events
|
|
* where the player is in the pos x/z quadrant of the world.
|
|
* <p><pre>{@code
|
|
* var playerInPosXZNode = EventNode.type("abc", EventFilter.PLAYER, (event, player) -> {
|
|
* var position = player.getPosition();
|
|
* return position.getX() > 0 && position.getZ() > 0;
|
|
* });
|
|
* }</pre>
|
|
*
|
|
* @param name The name of the event node
|
|
* @param filter The event type filter to apply
|
|
* @param predicate The event condition
|
|
* @param <E> The resulting event type of the node
|
|
* @param <V> The handler type of the event filter
|
|
* @return A node with an event type filter as well as a condition on the event.
|
|
*/
|
|
@Contract(value = "_, _, _ -> new", pure = true)
|
|
static <E extends Event, V> @NotNull EventNode<E> type(@NotNull String name,
|
|
@NotNull EventFilter<E, V> filter,
|
|
@NotNull BiPredicate<E, V> predicate) {
|
|
return create(name, filter, predicate);
|
|
}
|
|
|
|
/**
|
|
* Creates an event node which accepts any event of the given type which passes
|
|
* the provided condition. The condition is based on the event handler defined
|
|
* by the {@link EventFilter}.
|
|
* <p>
|
|
* For example, you could create an event filter which only accepts player events
|
|
* where the player is in creative mode.
|
|
* <p><pre>
|
|
* var playerIsCreative = EventNode.value("abc", EventFilter.PLAYER, Player::isCreative);
|
|
* </pre>
|
|
*
|
|
* @param name The name of the event node
|
|
* @param filter The event type filter to apply
|
|
* @param predicate The event condition
|
|
* @param <E> The resulting event type of the node
|
|
* @param <V> The handler type of the event filter
|
|
* @return A node with an event type filter as well as a condition on the event.
|
|
*/
|
|
@Contract(value = "_, _, _ -> new", pure = true)
|
|
static <E extends Event, V> @NotNull EventNode<E> value(@NotNull String name,
|
|
@NotNull EventFilter<E, V> filter,
|
|
@NotNull Predicate<V> predicate) {
|
|
return create(name, filter, (e, h) -> predicate.test(h));
|
|
}
|
|
|
|
/**
|
|
* Creates an event node which accepts any event of the given type which has a handler who
|
|
* has the given tag.
|
|
* <p>
|
|
* The {@link EventFilter}'s resulting event type must be {@link TagReadable}.
|
|
*
|
|
* @param name The name of the event node
|
|
* @param filter The event type filter to apply
|
|
* @param tag The tag which must be contained on the event handler
|
|
* @param <E> The resulting event type of the node
|
|
* @return A node with an event type filter as well as a handler with the provided tag
|
|
*/
|
|
@Contract(value = "_, _, _ -> new", pure = true)
|
|
static <E extends Event> @NotNull EventNode<E> tag(@NotNull String name,
|
|
@NotNull EventFilter<E, ? extends TagReadable> filter,
|
|
@NotNull Tag<?> tag) {
|
|
return create(name, filter, (e, h) -> h.hasTag(tag));
|
|
}
|
|
|
|
/**
|
|
* Creates an event node which accepts any event of the given type which has a handler who
|
|
* has an applicable tag. An applicable tag means that it passes the given condition.
|
|
*
|
|
* @param name The name of the event node
|
|
* @param filter The event type filter to apply
|
|
* @param tag The tag which must be contained on the event handler
|
|
* @param consumer The condition to test against the tag, if it exists.
|
|
* @param <E> The resulting event type of the node
|
|
* @return A node with an event type filter as well as a handler with the provided tag
|
|
*/
|
|
@Contract(value = "_, _, _, _ -> new", pure = true)
|
|
static <E extends Event, V> @NotNull EventNode<E> tag(@NotNull String name,
|
|
@NotNull EventFilter<E, ? extends TagReadable> filter,
|
|
@NotNull Tag<V> tag,
|
|
@NotNull Predicate<@Nullable V> consumer) {
|
|
return create(name, filter, (e, h) -> consumer.test(h.getTag(tag)));
|
|
}
|
|
|
|
private static <E extends Event, V> EventNode<E> create(@NotNull String name,
|
|
@NotNull EventFilter<E, V> filter,
|
|
@Nullable BiPredicate<E, V> predicate) {
|
|
//noinspection unchecked
|
|
return new EventNodeImpl<>(name, filter, predicate != null ? (e, o) -> predicate.test(e, (V) o) : null);
|
|
}
|
|
|
|
/**
|
|
* Calls an event starting from this node.
|
|
*
|
|
* @param event the event to call
|
|
*/
|
|
default void call(@NotNull T event) {
|
|
//noinspection unchecked
|
|
getHandle((Class<T>) event.getClass()).call(event);
|
|
}
|
|
|
|
default boolean hasListener(@NotNull Class<? extends T> type) {
|
|
return getHandle(type).hasListener();
|
|
}
|
|
|
|
/**
|
|
* Gets the handle of an event type.
|
|
*
|
|
* @param handleType the handle type
|
|
* @param <E> the event type
|
|
* @return the handle linked to {@code handleType}
|
|
*/
|
|
@ApiStatus.Experimental
|
|
<E extends T> @NotNull ListenerHandle<E> getHandle(@NotNull Class<E> handleType);
|
|
|
|
/**
|
|
* Execute a cancellable event with a callback to execute if the event is successful.
|
|
* Event conditions and propagation is the same as {@link #call(Event)}.
|
|
*
|
|
* @param event The event to execute
|
|
* @param successCallback A callback if the event is not cancelled
|
|
*/
|
|
default void callCancellable(@NotNull T event, @NotNull Runnable successCallback) {
|
|
call(event);
|
|
if (!(event instanceof CancellableEvent cancellableEvent) || !cancellableEvent.isCancelled()) {
|
|
successCallback.run();
|
|
}
|
|
}
|
|
|
|
@Contract(pure = true)
|
|
@NotNull Class<T> getEventType();
|
|
|
|
@Contract(pure = true)
|
|
@NotNull String getName();
|
|
|
|
@Contract(pure = true)
|
|
int getPriority();
|
|
|
|
@Contract(value = "_ -> this")
|
|
@NotNull EventNode<T> setPriority(int priority);
|
|
|
|
@Contract(pure = true)
|
|
@Nullable EventNode<? super T> getParent();
|
|
|
|
/**
|
|
* Returns an unmodifiable view of the children in this node.
|
|
*
|
|
* @see #addChild(EventNode)
|
|
* @see #removeChild(EventNode)
|
|
*/
|
|
@Contract(pure = true)
|
|
@NotNull Set<@NotNull EventNode<T>> getChildren();
|
|
|
|
/**
|
|
* Locates all child nodes with the given name and event type recursively starting at this node.
|
|
*
|
|
* @param name The event node name to filter for
|
|
* @param eventType The event node type to filter for
|
|
* @return All matching event nodes
|
|
*/
|
|
@Contract(pure = true)
|
|
<E extends T> @NotNull List<EventNode<E>> findChildren(@NotNull String name, Class<E> eventType);
|
|
|
|
/**
|
|
* Locates all child nodes with the given name and event type recursively starting at this node.
|
|
*
|
|
* @param name The event name to filter for
|
|
* @return All matching event nodes
|
|
*/
|
|
@Contract(pure = true)
|
|
default @NotNull List<EventNode<T>> findChildren(@NotNull String name) {
|
|
return findChildren(name, getEventType());
|
|
}
|
|
|
|
/**
|
|
* Replaces all children matching the given name and type recursively starting from this node.
|
|
* <p>
|
|
* Node: The callee may not be replaced by this call.
|
|
*
|
|
* @param name The event name to filter for
|
|
* @param eventType The event node type to filter for
|
|
* @param eventNode The replacement node
|
|
*/
|
|
<E extends T> void replaceChildren(@NotNull String name, @NotNull Class<E> eventType, @NotNull EventNode<E> eventNode);
|
|
|
|
/**
|
|
* Replaces all children matching the given name and type recursively starting from this node.
|
|
* <p>
|
|
* Node: The callee may not be replaced by this call.
|
|
*
|
|
* @param name The node name to filter for
|
|
* @param eventNode The replacement node
|
|
*/
|
|
default void replaceChildren(@NotNull String name, @NotNull EventNode<T> eventNode) {
|
|
replaceChildren(name, getEventType(), eventNode);
|
|
}
|
|
|
|
/**
|
|
* Recursively removes children with the given name and type starting at this node.
|
|
*
|
|
* @param name The node name to filter for
|
|
* @param eventType The node type to filter for
|
|
*/
|
|
void removeChildren(@NotNull String name, @NotNull Class<? extends T> eventType);
|
|
|
|
/**
|
|
* Recursively removes children with the given name starting at this node.
|
|
*
|
|
* @param name The node name to filter for
|
|
*/
|
|
default void removeChildren(@NotNull String name) {
|
|
removeChildren(name, getEventType());
|
|
}
|
|
|
|
/**
|
|
* Directly adds a child node to this node.
|
|
*
|
|
* @param child The child to add
|
|
* @return this, can be used for chaining
|
|
*/
|
|
@Contract(value = "_ -> this")
|
|
@NotNull EventNode<T> addChild(@NotNull EventNode<? extends T> child);
|
|
|
|
/**
|
|
* Directly removes the given child from this node.
|
|
*
|
|
* @param child The child to remove
|
|
* @return this, can be used for chaining
|
|
*/
|
|
@Contract(value = "_ -> this")
|
|
@NotNull EventNode<T> removeChild(@NotNull EventNode<? extends T> child);
|
|
|
|
@Contract(value = "_ -> this")
|
|
@NotNull EventNode<T> addListener(@NotNull EventListener<? extends T> listener);
|
|
|
|
@Contract(value = "_, _ -> this")
|
|
default <E extends T> @NotNull EventNode<T> addListener(@NotNull Class<E> eventType, @NotNull Consumer<@NotNull E> listener) {
|
|
return addListener(EventListener.of(eventType, listener));
|
|
}
|
|
|
|
@Contract(value = "_ -> this")
|
|
@NotNull EventNode<T> removeListener(@NotNull EventListener<? extends T> listener);
|
|
|
|
/**
|
|
* Maps a specific object to a node.
|
|
* <p>
|
|
* Be aware that such structure have huge performance penalty as they will
|
|
* always require a map lookup. Use only at last resort.
|
|
*
|
|
* @param value the mapped value
|
|
* @param filter the filter to use
|
|
* @return the node (which may have already been registered) directly linked to {@code value}
|
|
*/
|
|
@ApiStatus.Experimental
|
|
<E extends T, H> @NotNull EventNode<E> map(@NotNull H value, @NotNull EventFilter<E, H> filter);
|
|
|
|
/**
|
|
* Prevents the node from {@link #map(Object, EventFilter)} to be called.
|
|
*
|
|
* @param value the value to unmap
|
|
*/
|
|
@ApiStatus.Experimental
|
|
void unmap(@NotNull Object value);
|
|
|
|
@ApiStatus.Experimental
|
|
void register(@NotNull EventBinding<? extends T> binding);
|
|
|
|
@ApiStatus.Experimental
|
|
void unregister(@NotNull EventBinding<? extends T> binding);
|
|
}
|