From eae076a67767b932fa0812518d852d63a1301af1 Mon Sep 17 00:00:00 2001
From: liujiahua123123 <liujiahua123123@126.com>
Date: Thu, 8 Aug 2019 22:12:02 +0800
Subject: [PATCH] events

---
 .../net/mamoe/mirai/event/Cancelable.java     |  7 +++
 .../net/mamoe/mirai/event/MiraiEvent.java     |  2 +-
 .../net/mamoe/mirai/event/MiraiEventHook.java | 44 +++++++++++++++++
 .../mamoe/mirai/event/MiraiEventManager.java  | 49 +++++++++++++++++++
 .../java/net/mamoe/mirai/event/MiraiHook.java |  4 --
 .../mirai/event/MiraiHookPreferences.java     |  9 ++++
 6 files changed, 110 insertions(+), 5 deletions(-)
 create mode 100644 mirai-core/src/main/java/net/mamoe/mirai/event/Cancelable.java
 create mode 100644 mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventHook.java
 create mode 100644 mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventManager.java
 delete mode 100644 mirai-core/src/main/java/net/mamoe/mirai/event/MiraiHook.java
 create mode 100644 mirai-core/src/main/java/net/mamoe/mirai/event/MiraiHookPreferences.java

diff --git a/mirai-core/src/main/java/net/mamoe/mirai/event/Cancelable.java b/mirai-core/src/main/java/net/mamoe/mirai/event/Cancelable.java
new file mode 100644
index 000000000..5c0e79116
--- /dev/null
+++ b/mirai-core/src/main/java/net/mamoe/mirai/event/Cancelable.java
@@ -0,0 +1,7 @@
+package net.mamoe.mirai.event;
+
+interface Cancelable {
+
+    void setCancel(boolean value);
+
+}
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEvent.java b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEvent.java
index bae753df5..541283429 100644
--- a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEvent.java
+++ b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEvent.java
@@ -1,5 +1,5 @@
 package net.mamoe.mirai.event;
 
-public class MiraiEvent {
+public abstract class MiraiEvent {
 
 }
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventHook.java b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventHook.java
new file mode 100644
index 000000000..d4b7f37da
--- /dev/null
+++ b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventHook.java
@@ -0,0 +1,44 @@
+package net.mamoe.mirai.event;
+
+import lombok.Getter;
+
+import java.util.function.Consumer;
+
+public class MiraiEventHook<T extends MiraiEvent> {
+
+    @Getter
+    Class<T> eventClass;
+
+    @Getter
+    private Consumer<T> handler;
+    @Getter
+    private MiraiHookPreferences preferences;
+
+
+    public MiraiEventHook(Class<T> eventClass) {
+        this(eventClass,a -> {});
+    }
+
+    public MiraiEventHook(Class<T> eventClass, Consumer<T> handler){
+        this(eventClass,handler,new MiraiHookPreferences());
+    }
+
+    public MiraiEventHook(Class<T> eventClass, Consumer<T> handler, MiraiHookPreferences preferences){
+        this.eventClass = eventClass;
+        this.setHandler(handler);
+        this.setPreferences(preferences);
+    }
+
+    public MiraiEventHook<T> setHandler(Consumer<T> handler){
+        this.handler = handler;
+        return this;
+    }
+
+    public MiraiEventHook<T> setPreferences(MiraiHookPreferences preferences){
+        this.preferences = preferences;
+        return this;
+    }
+
+
+
+}
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventManager.java b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventManager.java
new file mode 100644
index 000000000..d2566e3ef
--- /dev/null
+++ b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiEventManager.java
@@ -0,0 +1,49 @@
+package net.mamoe.mirai.event;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+
+public class MiraiEventManager {
+    private MiraiEventManager(){
+
+    }
+
+    private static MiraiEventManager instance;
+
+    static MiraiEventManager getInstance(){
+        if(MiraiEventManager.instance == null){
+            MiraiEventManager.instance = new MiraiEventManager();
+        }
+        return MiraiEventManager.instance;
+    }
+
+    private Map<Class<? extends MiraiEvent>, List<MiraiEventConsumer<? extends MiraiEvent>>> hooks = new HashMap<>();
+
+    public <D extends MiraiEvent> void registerUntil(MiraiEventHook<D> hook, Predicate<D> toRemove){
+        hooks.putIfAbsent(hook.getEventClass(),new ArrayList<>());
+        hooks.get(hook.getEventClass()).add(new MiraiEventConsumer<>(hook,toRemove));
+    }
+
+    public <D extends MiraiEvent> void registerOnce(MiraiEventHook<D> hook){
+        this.registerUntil(hook,(a) -> true);
+    }
+
+    public <D extends MiraiEvent> void register(MiraiEventHook<D> hook){
+        this.registerUntil(hook,(a) -> false);
+    }
+
+}
+@Data
+@AllArgsConstructor
+class MiraiEventConsumer<T extends MiraiEvent>{
+    private MiraiEventHook<T> hook;
+    private Predicate<T> remove;
+}
+
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiHook.java b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiHook.java
deleted file mode 100644
index 40bb85ca3..000000000
--- a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiHook.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package net.mamoe.mirai.event;
-
-public class MiraiHook {
-}
diff --git a/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiHookPreferences.java b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiHookPreferences.java
new file mode 100644
index 000000000..11dc939d3
--- /dev/null
+++ b/mirai-core/src/main/java/net/mamoe/mirai/event/MiraiHookPreferences.java
@@ -0,0 +1,9 @@
+package net.mamoe.mirai.event;
+
+import lombok.Data;
+
+@Data
+public class MiraiHookPreferences {
+    private int priority = 0;
+    private boolean ignoreCanceled = true;
+}