[Add] Email engine for sending email message.

vnpy/trader/engine.py

@@ -5,6 +5,10 @@ import logging
 from datetime import datetime
 from abc import ABC
 from typing import Any
+from threading import Thread
+from queue import Queue, Empty
+import smtplib
+from email.message import EmailMessage
 
 from vnpy.event import EventEngine, Event
 
@@ -62,6 +66,7 @@ class MainEngine:
         """
         self.add_engine(LogEngine)
         self.add_engine(OmsEngine)
+        self.add_engine(EmailEngine)
 
     def write_log(self, msg: str):
         """
@@ -135,6 +140,9 @@ class MainEngine:
         Make sure every gateway and app is closed properly before
         programme exit.
         """
+        for engine in self.engines.values():
+            engine.close()
+
         for gateway in self.gateways.values():
             gateway.close()
 
@@ -157,6 +165,10 @@ class BaseEngine(ABC):
         self.event_engine = event_engine
         self.engine_name = engine_name
 
+    def close(self):
+        """"""
+        pass
+
 
 class LogEngine(BaseEngine):
     """
@@ -398,3 +410,66 @@ class OmsEngine(BaseEngine):
                 if order.vt_symbol == vt_symbol
             ]
             return active_orders
+
+
+class EmailEngine(BaseEngine):
+    """
+    Provides email sending function for VN Trader.
+    """
+
+    def __init__(self, main_engine: MainEngine, event_engine: EventEngine):
+        """"""
+        super(EmailEngine, self).__init__(main_engine, event_engine, "email")
+
+        self.thread = Thread(target=self.run)
+        self.queue = Queue()
+        self.active = False
+
+        self.main_engine.send_email = self.send_email
+
+    def send_email(self, subject: str, content: str, receiver: str = ""):
+        """"""
+        # Start email engine when sending first email.
+        if not self.active:
+            self.start()
+
+        # Use default receiver if not specified.
+        if not receiver:
+            receiver = SETTINGS["email.receiver"]
+
+        msg = EmailMessage()
+        msg["From"] = SETTINGS["email.sender"]
+        msg["To"] = SETTINGS["email.receiver"]
+        msg["Subject"] = subject
+        msg.set_content(content)
+
+        self.queue.put(msg)
+
+    def run(self):
+        """"""
+        while self.active:
+            try:
+                msg = self.queue.get(block=True, timeout=1)
+
+                with smtplib.SMTP_SSL(SETTINGS["email.server"],
+                                      SETTINGS["email.port"]) as smtp:
+                    smtp.login(
+                        SETTINGS["email.username"],
+                        SETTINGS["email.password"]
+                    )
+                    smtp.send_message(msg)
+            except Empty:
+                pass
+
+    def start(self):
+        """"""
+        self.active = True
+        self.thread.start()
+
+    def close(self):
+        """"""
+        if not self.active:
+            return
+
+        self.active = False
+        self.thread.join()

vnpy/trader/setting.py

@@ -7,9 +7,14 @@ from logging import CRITICAL
 SETTINGS = {
     "font.family": "Arial",
     "font.size": 12,
-
     "log.active": True,
     "log.level": CRITICAL,
     "log.console": True,
-    "log.file": True
+    "log.file": True,
+    "email.server": "smtp.qq.com",
+    "email.port": 465,
+    "email.username": "",
+    "email.password": "",
+    "email.sender": "",
+    "email.receiver": ""
 }

vnpy/trader/ui/mainwindow.py

@@ -103,6 +103,13 @@ class MainWindow(QtWidgets.QMainWindow):
             self.restore_window_setting
         )
 
+        self.add_menu_action(
+            help_menu,
+            "测试邮件",
+            "email.ico",
+            self.send_test_email
+        )
+
         self.add_menu_action(
             help_menu,
             "关于",
@@ -219,3 +226,9 @@ class MainWindow(QtWidgets.QMainWindow):
         """
         self.load_window_setting("default")
         self.showMaximized()
+
+    def send_test_email(self):
+        """
+        Sending a test email.
+        """
+        self.main_engine.send_email("VN Trader", "testing")

vnpy/trader/ui/widget.py

@@ -310,6 +310,11 @@ class TickMonitor(BaseMonitor):
             "cell": BaseCell,
             "update": False
         },
+        "exchange": {
+            "display": "交易所",
+            "cell": BaseCell,
+            "update": False
+        },
         "last_price": {
             "display": "最新价",
             "cell": BaseCell,
@@ -419,6 +424,11 @@ class TradeMonitor(BaseMonitor):
             "cell": BaseCell,
             "update": False
         },
+        "exchange": {
+            "display": "交易所",
+            "cell": BaseCell,
+            "update": False
+        },
         "direction": {
             "display": "方向",
             "cell": DirectionCell,
@@ -466,6 +476,11 @@ class OrderMonitor(BaseMonitor):
             "cell": BaseCell,
             "update": False
         },
+        "exchange": {
+            "display": "交易所",
+            "cell": BaseCell,
+            "update": False
+        },
         "direction": {
             "display": "方向",
             "cell": DirectionCell,
@@ -540,6 +555,11 @@ class PositionMonitor(BaseMonitor):
             "cell": BaseCell,
             "update": False
         },
+        "exchange": {
+            "display": "交易所",
+            "cell": BaseCell,
+            "update": False
+        },
         "direction": {
             "display": "方向",
             "cell": DirectionCell,