a issue parser of email

src/component/mail_environment/local.py

@@ -0,0 +1,34 @@
+import os
+import logging
+import json
+import string
+from knowledge import *
+from aios_kernel.storage import AIStorage
+from .mail import Mail, MailStorage
+
+
+class LocalEmail:
+    def __init__(self, env: KnowledgePipelineEnvironment, config:dict): 
+        self.config = config
+        self.env = env
+        path = string.Template(config["path"]).substitute(myai_dir=AIStorage.get_instance().get_myai_dir())
+        self.mail_storage = MailStorage(path, config.get("watch"))
+
+    async def next(self):
+        while True:
+            parsed = None
+            journals = self.env.journal.latest_journals(1)
+            if len(journals) == 1:
+                latest_journal = journals[0]
+                if latest_journal.is_finish():
+                    yield None
+                    continue
+                parsed = str(latest_journal.get_object_id())
+            
+            mail_id = self.mail_storage.next_mail_id(parsed)
+            if mail_id is None:
+                yield (None, None)
+            else:
+                yield (mail_id, str(mail_id))
+
+