From c93c7a47b82fad20754f8cedc301d73a906f432f Mon Sep 17 00:00:00 2001
From: git-sid <25916907+git-sid@users.noreply.github.com>
Date: Sun, 9 Sep 2018 17:22:00 +0200
Subject: [PATCH] added offset to telegram message polling to prevent
 duplicated responses

---
 active_bots/telegrambot.py |  4 +++-
 db.py                      |  6 ++++++
 user.py                    | 10 ++++++++++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/active_bots/telegrambot.py b/active_bots/telegrambot.py
index ab62fa5..637b332 100644
--- a/active_bots/telegrambot.py
+++ b/active_bots/telegrambot.py
@@ -10,7 +10,8 @@ logger = logging.getLogger(__name__)
 class TelegramBot(Bot):
     def crawl(self, user):
         tb = Telegram(user.get_telegram_credentials())
-        updates = tb.get_updates().wait()
+        seen_tg = user.get_seen_tg()
+        updates = tb.get_updates(offset=seen_tg+1).wait()
         reports = []
         for update in updates:
             try:
@@ -28,6 +29,7 @@ class TelegramBot(Bot):
                 else:
                     reports.append(Report(update.message.sender.username, self,
                                    update.message.text, None, update.message.date))
+                user.save_seen_tg(update.message.id)
             except AttributeError:
                 print(updates[0], updates[1])  # Telegram API returns an Error
                 return reports
diff --git a/db.py b/db.py
index 473b24a..c875a2e 100644
--- a/db.py
+++ b/db.py
@@ -75,6 +75,12 @@ class DB(object):
                 FOREIGN KEY(mastodon_accounts_id)
                     REFERENCES mastodon_accounts(id)
             );
+            CREATE TABLE IF NOT EXISTS seen_telegrams (
+                id                 INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,
+                user_id            INTEGER,
+                tg_id              INTEGER,
+                FOREIGN KEY(user_id) REFERENCES user(id),
+            );
             CREATE TABLE IF NOT EXISTS twitter_request_tokens (
                 id          INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,
                 user_id     INTEGER,
diff --git a/user.py b/user.py
index 9356518..a7c79df 100644
--- a/user.py
+++ b/user.py
@@ -174,6 +174,16 @@ schlitz
                    (tweet_id, self.uid))
         db.commit()
 
+    def get_seen_tg(self):
+        db.execute("SELECT tg_id FROM seen_telegrams WHERE user_id = ?;",
+                   (self.uid,))
+        return db.cur.fetchone()
+
+    def save_seen_tg(self, tg_id):
+        db.execute("UPDATE seen_telegrams SET tg_id = ? WHERE user_id = ?;",
+                   (tg_id, self.uid))
+        db.commit()
+
     def get_mailinglist(self):
         db.execute("SELECT email FROM mailinglist WHERE user_id = ?;", (self.uid, ))
         return db.cur.fetchall()