From e1fd96feb48a0f7deabafa3ddb2f2daf3ba6a8b8 Mon Sep 17 00:00:00 2001
From: hyfc <3365132+hyfc@users.noreply.github.com>
Date: Sun, 24 Jun 2018 19:13:57 +0800
Subject: coping with large text entities

---
 bot.py          | 17 ++++++++++++++---
 utils/client.py |  4 ++--
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/bot.py b/bot.py
index 85c32d2..43134ec 100644
--- a/bot.py
+++ b/bot.py
@@ -3,6 +3,7 @@ import os
 
 from utils.client import EmailClient
 from telegram import ParseMode
+from telegram.constants import MAX_MESSAGE_LENGTH
 from telegram.ext import (Updater, CommandHandler)
 
 
@@ -12,6 +13,15 @@ logger = logging.getLogger(__name__)
 
 bot_token = os.environ['TELEGRAM_TOKEN']
 
+def handle_large_text(text):
+    while text:
+        if len(text) < MAX_MESSAGE_LENGTH:
+            yield text
+            text = None
+        else:
+            out = text[:MAX_MESSAGE_LENGTH]
+            yield out
+            text = text.lstrip(out)
 
 def error(bot, update, _error):
     """Log Errors caused by Updates."""
@@ -48,9 +58,10 @@ def get_email(bot, update, args):
     index = args[0]
     with EmailClient(email_addr, email_passwd) as client:
         mail = client.get_mail_by_index(index)
-        bot.send_message(update.message.chat_id,
-                         parse_mode=ParseMode.MARKDOWN,
-                         text=mail)
+        content = mail.__repr__()
+        for text in handle_large_text(content):
+            bot.send_message(update.message.chat_id,
+                             text=text)
 
 def main():
     # Create the EventHandler and pass it your bot's token.
diff --git a/utils/client.py b/utils/client.py
index 07518bb..1dc9205 100644
--- a/utils/client.py
+++ b/utils/client.py
@@ -43,10 +43,10 @@ class EmailClient(object):
 
     def __exit__(self, exc_type, exc_val, exc_tb):
         if exc_type is None:
-            print('exited normally\n')
+            logger.info('exited normally\n')
             self.server.quit()
         else:
-            print('raise an exception! ' + str(exc_type))
+            logger.error('raise an exception! ' + str(exc_type))
             self.server.close()
             return False # Propagate
 
-- 
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