add signal close.

src/component/internal/messages.ts

@@ -191,6 +191,11 @@ export class NekoMessages extends EventEmitter<NekoEvents> {
     Vue.set(this._state.connection.webrtc, 'video', video)
   }
 
+  protected [EVENT.SIGNAL_CLOSE]() {
+    this._localLog.debug(`EVENT.SIGNAL_CLOSE`)
+    this._connection.webrtc.close()
+  }
+
   /////////////////////////////
   // Session Events
   /////////////////////////////

src/component/internal/webrtc.ts

@@ -230,6 +230,14 @@ export class NekoWebRTC extends EventEmitter<NekoWebRTCEvents> {
     await this._peer.setRemoteDescription({ type: 'answer', sdp })
   }
 
+  public async close() {
+    if (!this._peer) {
+      throw new Error('attempting to close nonexistent peer')
+    }
+
+    this._peer.close()
+  }
+
   public addTrack(track: MediaStreamTrack, ...streams: MediaStream[]): RTCRtpSender {
     if (!this._peer) {
       throw new Error('attempting to add track for nonexistent peer')

src/component/types/events.ts

@@ -10,6 +10,7 @@ export const SIGNAL_ANSWER = 'signal/answer'
 export const SIGNAL_PROVIDE = 'signal/provide'
 export const SIGNAL_CANDIDATE = 'signal/candidate'
 export const SIGNAL_VIDEO = 'signal/video'
+export const SIGNAL_CLOSE = 'signal/close'
 
 export const SESSION_CREATED = 'session/created'
 export const SESSION_DELETED = 'session/deleted'