support for autoremoving X days old files

code/utils/utils.py

@@ -1,5 +1,6 @@
 import os
 from datetime import datetime
+from dateutil.relativedelta import relativedelta
 from flask import current_app as app
 import requests
 import re
@@ -92,6 +93,44 @@ def download_url(url, filename):
     return (True, ("OK", 200 ))
 
 
+def file_autoremove(path, share, notifier = None):
+    autoremove = get_or_none('autoremove', share, 0)
+    if autoremove == 0:
+        return
+    full_path = os.path.join(
+        share['path'],
+        path
+    )
+    age, age_str = file_age(full_path)
+    if age.days >= autoremove:
+        os.remove(full_path)
+        if notifier != None:
+            notifier({
+                "recipient": get_or_none('recipient', share),
+                "share": share['name'],
+                "filename": full_path,
+                "file_age": age_str,
+                "operation": "autoremove"
+            })
+        return True
+    return False
+
+
+def file_age(path):
+    now = datetime.now()
+    then = datetime.fromtimestamp(
+        os.stat(path).st_mtime
+    )
+    diff = now - then
+    rdiff = relativedelta(now, then)
+    return diff, "%dM %02dD %02d:%02dH" % (
+        rdiff.years * 12 + rdiff.months,
+        rdiff.days,
+        rdiff.hours,
+        rdiff.minutes
+    )
+
+
 def file_date_human(num):
     return datetime.fromtimestamp(
         num