fix: Removed dependency for Node.EventEmitter

package.json

@@ -13,8 +13,7 @@
     "grimoire"
   ],
   "dependencies": {
-    "@types/node": "^8.0.14",
-    "events": "^1.1.1"
+    "eventemitter3": "^2.0.3"
   },
   "devDependencies": {
     "ava": "^0.21.0",

src/Base/EEObject.ts

@@ -1,26 +1,50 @@
-/// <reference types="node"/>
-import {EventEmitter} from "events";
+import { EventEmitter, ListenerFn } from "eventemitter3";
 import IDObject from "./IDObject";
 
 /**
  * EventEmitterをmixinしたIDObject
  */
-class EEObject extends IDObject implements NodeJS.EventEmitter {
-  public prependListener: (event: string, listener: Function) => this;
-  public prependOnceListener: (event: string, listener: Function) => this;
-  public eventNames: () => string[];
-  public addListener: (event: string, listener: Function) => this;
-  public on: (event: string, listener: Function) => this;
-  public once: (event: string, listener: Function) => this;
-  public removeListener: (event: string, listener: Function) => this;
-  public removeAllListeners: (event?: string) => this;
-  public setMaxListeners: (n: number) => this;
-  public getMaxListeners: () => number;
-  public listeners: (event: string) => Function[];
-  public listenerCount: (type: string) => number;
-  public emit: (event: string, ...args: any[]) => boolean;
+class EEObject extends IDObject implements EventEmitter {
+  /**
+   * Return an array listing the events for which the emitter has registered
+   * listeners.
+   */
+  public eventNames: () => Array<string | symbol>;
+
+  /**
+   * Return the listeners registered for a given event.
+   */
+  public listeners: ((event: string | symbol, exists: boolean) => Array<ListenerFn> | boolean) & ((event: string | symbol) => Array<ListenerFn>);
+
+  /**
+   * Calls each of the listeners registered for a given event.
+   */
+  public emit: (event: string | symbol, ...args: Array<any>) => boolean;
+
+  /**
+   * Add a listener for a given event.
+   */
+  public on: (event: string | symbol, fn: ListenerFn, context?: any) => this;
+  public addListener: (event: string | symbol, fn: ListenerFn, context?: any) => this;
+
+  /**
+   * Add a one-time listener for a given event.
+   */
+  public once: (event: string | symbol, fn: ListenerFn, context?: any) => this;
+
+  /**
+   * Remove the listeners of a given event.
+   */
+  public removeListener: (event: string | symbol, fn?: ListenerFn, context?: any, once?: boolean) => this;
+  public off: (event: string | symbol, fn?: ListenerFn, context?: any, once?: boolean) => this;
+
+  /**
+   * Remove all listeners, or those of the specified event.
+   */
+  public removeAllListeners: (event?: string | symbol) => this;
   constructor() {
     super();
+    EventEmitter.call(this);
   }
 }
 

src/Base/ListenerFunction.ts

@@ -0,0 +1,3 @@
+import {ListenerFn} from "eventemitter3";
+export interface Fake {}
+export default ListenerFn;

src/Interface/NodeInterface.ts

@@ -4,6 +4,7 @@ import GomlParser from "../Node/GomlParser";
 import Attribute from "../Node/Attribute";
 import GomlNode from "../Node/GomlNode";
 import {Name, Nullable} from "../Base/Types";
+import ListenerFunction from "../Base/ListenerFunction";
 
 
 /**
@@ -104,9 +105,9 @@ export default class NodeInterface {
   /**
    * 対象ノードにイベントリスナを追加します。
    * @param {string}   eventName [description]
-   * @param {Function} listener  [description]
+   * @param {ListenerFunction} listener  [description]
    */
-  public on(eventName: string, listener: Function): NodeInterface {
+  public on(eventName: string, listener: ListenerFunction): NodeInterface {
     this.forEach(node => {
       node.on(eventName, listener);
     });
@@ -116,9 +117,9 @@ export default class NodeInterface {
   /**
    * 対象ノードに指定したイベントリスナが登録されていれば削除します
    * @param {string}   eventName [description]
-   * @param {Function} listener  [description]
+   * @param {ListenerFunction} listener  [description]
    */
-  public off(eventName: string, listener: Function): NodeInterface {
+  public off(eventName: string, listener: ListenerFunction): NodeInterface {
     this.forEach(node => {
       node.removeListener(eventName, listener);
     });