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trying_to_fix_nextcloud.py

@@ -1,6 +1,8 @@
 import requests
 import xml.etree.ElementTree as ET
 import sys
+import time
+import datetime
 
 # Prepare and send the propfind request return xml string
 def propfind(path,auth):
@@ -23,9 +25,6 @@ def search_folder(requestreturn):
   # First folder provided in the xml file is always the folder we are currently in.
   # To prevent searching this folder twice, or ending in a loop, we can not store this folder in the folderlist again.
   firstfolder = True
-  # Name of files are stored as an string. But we can check the timestamp of the file after we can check the name, 
-  # so it needs to be stored temporary in case the timestamp is wrong
-  temp = "this is sa temporary storage"
   # Get a xml tree
   tree = ET.ElementTree(ET.fromstring(requestreturn))
   # Find all responses in the tree, those contain the fielpath, lasttimemodified, typeoffile etc.
@@ -41,17 +40,50 @@ def search_folder(requestreturn):
           else: 
             firstfolder = False
           break
-        else:
-          temp = p.text
       # In case p.text is none, it contains the further information
       else:
-        # Find time last modfied and check if the year is before 1990
-        for time in p.findall('.//{DAV:}getlastmodified'):
-          year = time.text.split(' ')
-          if int(year[3]) < 1990:
-            linkswrongtime.append(temp)
+        for t in p.findall('.//{DAV:}getlastmodified'):
+          #this function converts the given date to unix timestamp
+          lastmodified = time.mktime(datetime.datetime.strptime(t.text, "%a, %d %b %Y %H:%M:%S GMT").timetuple())
+          #631148400 is the unix timestamp of 01.01.1990 00:00:00, because we know there is no file older than this in our nextcloud system
+          if lastmodified < 631148400:
+            for fileid in p.findall('.//{http://owncloud.org/ns}fileid'):
+              linkswrongtime.append(fileid.text)
   return [innerfolders, linkswrongtime]
 
+# This function returns the fileid of the version of a given fileid with the most current timestamp or None if there are no versions with a timestamp younger than 01.01.1990
+def version_check(xmlfile):
+  tree = ET.ElementTree(ET.fromstring(xmlfile))
+  # Name of files are stored as a string. But we can check the timestamp of the file only after we can check the name, 
+  # so it needs to be stored temporary in case the timestamp is the most current
+  temp = "this is a temporary string"
+  # These two variables are used to store the highest/most current timestamp and the associated fileid
+  most_current_timestamp = 631148400
+  most_current_timestamp_fileid = 0
+  for resp in tree.findall('.//{DAV:}response'):
+    for p in resp:
+      # In case p.text is not none, it contains the filepath
+      if not(p.text is None):
+        temp = p.text
+      else:
+        for t in p.findall('.//{DAV:}getlastmodified'):
+          if not(t.text is None):
+            #this function converts the given date to unix timestamp
+            lastmodified = time.mktime(datetime.datetime.strptime(t.text, "%a, %d %b %Y %H:%M:%S GMT").timetuple())
+            #
+            if lastmodified > most_current_timestamp:
+              most_current_timestamp = lastmodified
+              fileid_old_version = temp.split('/')
+              most_current_timestamp_fileid = fileid_old_version[-1]
+          else:
+            break
+  # Check if there is another version and a file with a current timestamp
+  if most_current_timestamp_fileid != 0:
+    return most_current_timestamp_fileid
+  else:
+    return None
+
+def main():
   # Enter username and password to enter nextcloud via webdav
   user = sys.argv[1]
   passw = sys.argv[2]
@@ -61,7 +93,7 @@ prefix_path = "https://kingsx.cs.uni-saarland.de"
   mainpath = "/remote.php/dav/files/"+ user + "/Testrequests/"
   # List of all folderpaths we need to enter
   folders = [mainpath]
-# List of all filepaths with wrong time
+  # List of all fileids with wrong time
   wrongtime = []
 
   # Iterate through all folders and check for wrong timestamps
@@ -73,9 +105,12 @@ while folders:
     # Append all found folders and files with wrong timestamps to global list
     folders = folders + res[0]
     wrongtime = wrongtime + res[1]
+    # Iterate through all fileids with wrong timestamps and check for versions with intact timestamp
+    while wrongtime:
+      fileid = wrongtime.pop(0)
+      version_suffix = "/remote.php/dav/versions/" + user + "/versions/" + fileid
+      version_path = prefix_path + version_suffix
+      versions = propfind(version_path,auth)
+      print(version_check(versions))
 
-  # Print out the list of all the filenames with the wrong time
-print(wrongtime)
-
-# By now just storage of suffix used to enter version files via FILEID
-version_suffix = "/remote.php/dav/versions/USER/versions/FILEID"
+main()