objected knowledge base implement for email code structure

src/service/email_spider/converter.py

@@ -0,0 +1,24 @@
+from aios_kernel.knowledge import KnowledgeBase, EmailObject
+
+# define a email converter class
+
+class EmailConverter:
+    # define init method
+    def __init__(self, local_dir, knowledge_base: KnowledgeBase) -> None:
+        pass
+
+    async def run(self):
+        # convert the email to knowledge object
+        for email_dir in self._next():
+            # convert the email to knowledge object
+            knowledge_object = self._convert(email_dir)
+            # insert the knowledge object to knowledge base
+            await self.knowledge_base.insert(knowledge_object)
+
+    def _next(self) -> str:
+        pass
+
+    def _convert(self, email_dir) -> EmailObject:
+        pass
+
+    

src/service/email_spider/main.py

@@ -0,0 +1,12 @@
+import asyncio
+from .spider import EmailSpider, EmailConverter
+
+
+if __name__ == "__main__":
+    spider = EmailSpider("smtp.163.com","user","pwd","./email")
+    asyncio.run(spider.run())
+
+    converter = EmailConverter("./email",KnowledgeBase())
+    asyncio.run(converter.run())
+
+    

src/service/email_spider/spider.py

@@ -0,0 +1,17 @@
+# define a email spider class
+
+class EmailSpider:
+    def __init__(self, address, account, pwd, local_dir) -> None:
+        pass
+
+    async def run(self): 
+        # spide the email from the email server
+        for email_link in self._next():
+            # save the email to local directory
+            self._save(email_link)
+
+    def _next(self):
+        pass
+
+    def _save(self, email_link) -> str:
+        pass