From b84628e01d25200da4174c69687b77258e4293fd Mon Sep 17 00:00:00 2001
From: Dan <14043624+delivrance@users.noreply.github.com>
Date: Fri, 13 Apr 2018 15:20:47 +0200
Subject: [PATCH] Add syncer module

---
 pyrogram/client/syncer.py | 107 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 pyrogram/client/syncer.py

diff --git a/pyrogram/client/syncer.py b/pyrogram/client/syncer.py
new file mode 100644
index 00000000..2fa464be
--- /dev/null
+++ b/pyrogram/client/syncer.py
@@ -0,0 +1,107 @@
+import base64
+import json
+import logging
+import os
+import shutil
+import time
+from threading import Thread, Event, Lock
+from . import utils
+
+log = logging.getLogger(__name__)
+
+
+class Syncer:
+    INTERVAL = 2
+
+    clients = {}
+    thread = None
+    event = Event()
+    lock = Lock()
+
+    @classmethod
+    def add(cls, client):
+        with cls.lock:
+            cls.sync(client)
+
+            cls.clients[id(client)] = client
+
+            if len(cls.clients) == 1:
+                cls.start()
+
+    @classmethod
+    def remove(cls, client):
+        with cls.lock:
+            cls.sync(client)
+
+            del cls.clients[id(client)]
+
+            if len(cls.clients) == 0:
+                cls.stop()
+
+    @classmethod
+    def start(cls):
+        cls.event.clear()
+        cls.thread = Thread(target=cls.worker, name=cls.__name__)
+        cls.thread.start()
+
+    @classmethod
+    def stop(cls):
+        cls.event.set()
+
+    @classmethod
+    def worker(cls):
+        while True:
+            cls.event.wait(cls.INTERVAL)
+
+            if cls.event.is_set():
+                break
+
+            with cls.lock:
+                for client in cls.clients.values():
+                    cls.sync(client)
+
+    @classmethod
+    def sync(cls, client):
+        try:
+            auth_key = base64.b64encode(client.auth_key).decode()
+            auth_key = [auth_key[i: i + 43] for i in range(0, len(auth_key), 43)]
+
+            data = dict(
+                dc_id=client.dc_id,
+                test_mode=client.test_mode,
+                auth_key=auth_key,
+                user_id=client.user_id,
+                date=int(time.time()),
+                peers_by_id={
+                    k: getattr(v, "access_hash", None)
+                    for k, v in client.peers_by_id.items()
+                },
+                peers_by_username={
+                    k: utils.get_peer_id(v)
+                    for k, v in client.peers_by_username.items()
+                },
+                peers_by_phone={
+                    k: utils.get_peer_id(v)
+                    for k, v in client.peers_by_phone.items()
+                }
+            )
+
+            with open("{}.sync".format(client.session_name), "w", encoding="utf-8") as f:
+                json.dump(data, f, indent=4)
+
+                f.flush()
+                os.fsync(f.fileno())
+        except Exception as e:
+            log.critical(e, exc_info=True)
+        else:
+            shutil.move(
+                "{}.sync".format(client.session_name),
+                "{}.session".format(client.session_name)
+            )
+
+            log.info("Synced {}".format(client.session_name))
+        finally:
+            try:
+                os.remove("{}.sync".format(client.session_name))
+            except OSError:
+                pass