import requests
import xml.etree.ElementTree as ET
import sys

# Prepare and send the propfind request return xml string
def propfind(path,auth):
  headers = {"Depth":"1"}
  # This body returns only the timelastmodified and the fileid variable
  data = "<d:propfind  xmlns:d=\"DAV:\" xmlns:oc=\"http://owncloud.org/ns\" xmlns:nc=\"http://nextcloud.org/ns\">"+"<d:prop>"+"<d:getlastmodified />"+ "<oc:fileid />"+"</d:prop>"+"</d:propfind>"
  req = r = requests.Request("PROPFIND", path, headers=headers, auth=auth, data=data)
  prepped = req.prepare()
    
  s = requests.Session()
  resp = s.send(prepped)
  return resp.text

# Function iterates through the given xml which contains all files and folders in the provided path
def search_folder(requestreturn):
  # List to collect path of folders stored in path 
  innerfolders = []
  # List to collect path of files with wrong timestamp
  linkswrongtime = []
  # 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.
  for resp in tree.findall('.//{DAV:}response'):
    # Here we can get the filpath out of href and get further information in prop (lastimemodified, typeoffile, etc.)
    for p in resp:
      # In case p.text is not none, it contains the filepath
      if not(p.text is None):
        if (p.text[-1] == '/'):
          # If the current object is a folder, check it its not first folder
          if not(firstfolder):
            innerfolders.append(p.text)
          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)
  return [innerfolders, linkswrongtime]

# Enter username and password to enter nextcloud via webdav
user = sys.argv[1]
passw = sys.argv[2]
auth = requests.auth.HTTPBasicAuth(user,passw)
# Prepare the path we want to use
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
wrongtime = []

# Iterate through all folders and check for wrong timestamps
while folders:
  path_suffix = folders.pop(0)
  path = prefix_path + str(path_suffix)
  r = propfind(path,auth)
  res = search_folder(r)
  # Append all found folders and files with wrong timestamps to global list
  folders = folders + res[0]
  wrongtime = wrongtime + res[1]

  # 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"