Fix status number using sequence data

tests.py

@@ -41,6 +41,7 @@ from utils import followPerson
 from utils import getNicknameFromActor
 from utils import getDomainFromActor
 from utils import copytree
+from utils import getStatusNumber
 from follow import followerOfPerson
 from follow import unfollowPerson
 from follow import unfollowerOfPerson
@@ -1426,8 +1427,19 @@ def testAddEmoji():
     os.chdir(baseDirOriginal)
     shutil.rmtree(baseDirOriginal+'/.tests')
 
+def testGetStatusNumber():
+    print('testGetStatusNumber')
+    prevStatusNumber=None
+    for i in range(1,20):
+        statusNumber,published = getStatusNumber()
+        if prevStatusNumber:
+            assert len(statusNumber) == 18
+            assert int(statusNumber) > prevStatusNumber
+        prevStatusNumber=int(statusNumber)
+
 def runAllTests():
     print('Running tests...')
+    testGetStatusNumber()
     testAddEmoji()
     testWebLinks()
     testActorParsing()

utils.py

@@ -18,7 +18,12 @@ def getStatusNumber() -> (str,str):
     currTime=datetime.datetime.utcnow()
     daysSinceEpoch=(currTime - datetime.datetime(1970,1,1)).days
     # status is the number of seconds since epoch
-    statusNumber=str(((daysSinceEpoch*24*60*60) + (currTime.hour*60*60) + (currTime.minute*60) + currTime.second)*1000000 + currTime.microsecond)
+    statusNumber=str(((daysSinceEpoch*24*60*60) + (currTime.hour*60*60) + (currTime.minute*60) + currTime.second)*1000 + int(currTime.microsecond/1000))
+    # See https://github.com/tootsuite/mastodon/blob/995f8b389a66ab76ec92d9a240de376f1fc13a38/lib/mastodon/snowflake.rb
+    # use the leftover microseconds as the sequence number
+    sequenceId=currTime.microsecond % 1000
+    # shift by 16bits "sequence data"
+    statusNumber=str((int(statusNumber)<<16)+sequenceId)
     published=currTime.strftime("%Y-%m-%dT%H:%M:%SZ")
     return statusNumber,published