troggle/core/views/uploads.py

import re, os
import subprocess
import json
import settings
import urllib
import operator

from pathlib import Path
from functools import reduce

from django import forms

from django.conf import settings
from django.urls import reverse
from django.db.models import Q
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render
from django.template import Context, loader
from django.core.files.storage import FileSystemStorage, default_storage
from django.core.exceptions import ObjectDoesNotExist, MultipleObjectsReturned


#from troggle import settings
from troggle.parsers.imports import import_caves, import_people, import_surveyscans
from troggle.parsers.imports import import_logbooks, import_QMs, import_drawingsfiles, import_survex
from troggle.parsers.scans import wallet_blank_json, wallet_blank_html, contentsjson, indexhtml
# from databaseReset import reinit_db # don't do this. databaseRest runs code *at import time*
from troggle.core.models.troggle import DataIssue
from troggle.core.models.troggle import Expedition, Person, PersonExpedition
from troggle.core.models.caves import LogbookEntry, QM, Cave, PersonTrip
from troggle.core.models.survex import DrawingFile
from troggle.core.views.scans import oldwallet, walletindex
from troggle.core.views.caves import getCave

from .auth import login_required_if_public
#from django.views.decorators.csrf import ensure_csrf_cookie, csrf_exempt

'''File upload 'views' 
'''

todo = '''
- Register uploaded filenames in the Django db without needing to wait for a reset & bulk file import

- Refactor scanupload() as it contains all the wallets 'complaints' code from the old script wallets.py

- Need to validate uploaded file as being a valid image file, not a dubious script or hack

- Write equivalent GPX upload form system, similar to scanupload() but in expofiles/gpslogs/
  Need to validate it as being a valid GPX file using an XML parser, not a dubious script or hack
  
- Validate Tunnel & Therion files using an XML parser in dwgupload(). Though Julian says tunnel is only mostly correct XML

- Validate image files using a magic recogniser in scanupload() https://pypi.org/project/reportlab/ or 
  https://stackoverflow.com/questions/889333/how-to-check-if-a-file-is-a-valid-image-file

- Enable folder creation in dwguploads or as a separate form

'''

class FilesForm(forms.Form):  # not a model-form, just a form-form
    uploadfiles = forms.FileField() 

class TextForm(forms.Form):  # not a model-form, just a form-form
    photographer = forms.CharField(strip=True) 

class WalletForm(forms.Form):  # not a model-form, just a form-form
    descriptionw = forms.CharField(strip=True, required=False) 
    people = forms.CharField(strip=True, required=False) 
    survexnr = forms.CharField(strip=True, required=False) 
    qmsw = forms.CharField(strip=True, required=False) 
    date = forms.CharField(strip=True, required=True) # the only required field
    websiteupt = forms.CharField(strip=True, required=False) 
    elevnr = forms.CharField(strip=True, required=False) 
    cave = forms.CharField(strip=True, required=False) 
    psg = forms.CharField(strip=True, required=False) 
    plannr = forms.CharField(strip=True, required=False) 
    electronic = forms.CharField(strip=True, required=False) 
    pland = forms.CharField(strip=True, required=False) 
    elevd = forms.CharField(strip=True, required=False) 
    url = forms.CharField(strip=True, required=False) 
    survex = forms.CharField(strip=True, required=False) 

xlate = {"url": "description url",
        "descriptionw": "description written",
        "people": "people",
        "date": "date",
        "cave": "cave",
        "plannr": "plan not required",
        "survexnr": "survex not required",
        "qmsw": "qms written",
        "elevnr": "elev not required",
        "websiteupt": "website updated",
        "electronic": "electronic survey",
        "pland": "plan drawn",
        "elevd": "elev drawn",
        "psg": "name", # not real ?
        "survex": "survex file",
        }

def get_complaints(complaints, waldata, svxfiles, files, wallet, wurl):
    '''Taken from old script wallets.py and edited to make more comprehensible
    Loads the survex files names and processes all complaints
    '''
    # Date
    if not waldata["date"]:
        complaints.append("A date is mandatory. No data can be updated or edited unless you specify a date. Look in the survex file if there is one.") 

    # People
    if waldata["people"]==["NOBODY"] or waldata["people"]==["Unknown"]:
        complaints.append("Someody must have done this. Look in the survex file, or in the logbook entries for this date, for the people who created this data.") 
    
    survex_complaint = ""

    if waldata["survex file"]:
        if not type(waldata["survex file"])==list: # a string also is a sequence type, so do it this way
            waldata["survex file"] = [waldata["survex file"]]       
        for svx in waldata["survex file"]:
            svxfiles.append(svx)
            if not (Path(settings.SURVEX_DATA) / svx).is_file():
                file_complaint = f"{wallet} Incorrect survex file name in wallet data: {svx} not found in LOSER repo"
                complaints.append(file_complaint)
                message = f"! {file_complaint}"
                print(message)
                DataIssue.objects.create(parser='scans', message=message, url=wurl) # set URL to this wallet folder

    if waldata["survex not required"] and waldata["survex file"] != "":
        survex_complaint = "Survex is stated as not required and yet there is a survex file!"    
    if not waldata["survex not required"] and waldata["survex file"] == "":
        survex_complaint = "A survex file is required, but has not been specified!"    
    if survex_complaint:
        complaints.append(survex_complaint)
    
    # Notes required
    if not waldata["electronic survey"]:
        notes_scanned = reduce(operator.or_, [f.startswith("note") for f in files], False)
        notes_scanned = reduce(operator.or_, [f.endswith("note") for f in files], notes_scanned)
        if not notes_scanned:
            complaints.append("The notes needs scanning (or renaming): no noteNN.jpg or XXnote.jpg file found; and this is not an electronic survey.") 

    # Plan drawing required
    plan_scanned = reduce(operator.or_, [f.startswith("plan") for f in files], False)
    plan_scanned = reduce(operator.or_, [f.endswith("plan") for f in files], plan_scanned)
    plan_drawing_required = not (plan_scanned or waldata["plan drawn"] or waldata["plan not required"])
    if plan_drawing_required:
        complaints.append("The plan needs drawing (or renaming, or tick 'Plan drawn' checkbox or 'Plan not required' checkbox): no planNN.jpg or XXplan.jpg file found.") 

    # Elev drawing required
    elev_scanned = reduce(operator.or_, [f.startswith("elev") for f in files], False)
    elev_scanned = reduce(operator.or_, [f.endswith("elev") for f in files], elev_scanned)
    elev_drawing_required = not (elev_scanned or waldata["elev drawn"] or waldata["elev not required"])
    if elev_drawing_required:
        complaints.append("The elevation needs drawing (or renaming, or tick 'Elev drawn' checkbox or 'Elev not required' checkbox): no elevNN.jpg or XXelev.jpg file found.") 

    # Electronic Surveys
    if not waldata["electronic survey"]:
        if elev_drawing_required or plan_drawing_required:
            complaints.append("Tunnel or Therion drawing files need drawing. Or if this an electronic survey, please tick the 'Electronic survey' checkbox.") 
     
    # Description
    if not waldata["description written"]: 
        complaints.append("The guidebook description needs writing into the survex file. Tick the 'Cave description written' checkbox when this is done.") 
    # QMs
    if not waldata["qms written"]:
        complaints.append("The QMs needs writing into the survex file. Tick the 'QMs written' checkbox when this is done.") 

    # Website
    if not waldata["website updated"]:
        complaints.append("The cave description website is marked as needing updating using the guidebook description from the survex file. Tick the 'Website updated' checkbox when this is done.")

    # FInd the cave, if it exists
    if waldata["cave"]:
        try:
            caveid = waldata["cave"]
            caveid = caveid.replace("/","-")
            caveobject = getCave(caveid)   
            print(f'getCave for id "{waldata["cave"]}" {caveobject}')
            if not caveobject.url == waldata["description url"]:
                complaints.append(f'The URL of cave description \"{waldata["description url"]}\" does not match the one on record for this cave which is: "{caveobject.url}". If the wallet is not for a cave, put a useful URL here.')
        except Cave.MultipleObjectsReturned: 
            complaints.append(f'The cave ID \'{waldata["cave"]}\' is AMBIGUOUS. Please fix it.')
            caveobject = None
        except ObjectDoesNotExist:
            complaints.append(f'The cave ID \'{waldata["cave"]}\' is not recognised. Please fix it.')
            caveobject = None
    else:
        complaints.append(f'No cave ID is given. Please give an ID, even if it is just "surface survey" or "scraps found in hut"')
        caveobject = None
         

    return complaints, caveobject
    
# @login_required_if_public
def scanupload(request, path=None):
    '''Upload scanned image files into a wallet on /expofiles
    Also display and edit the contents.json data in the wallet.
    
    This does NOT use a Django model linked to a Django form. Just a simple Django form.
    You will find the Django documentation on forms very confusing, This is simpler.
    
    This subsumes much of the code which was in the old wallets.py script and so this function is very long
    indeed and needs refactoring.
    '''
    filesaved = False
    actual_saved = []
    
    checkboxes = ["description written", "survex not required", "qms written", "website updated",
            "plan not required", "plan drawn", "elev not required", "elev drawn", "electronic survey" ]
    if path:
        wallet = urllib.parse.unquote(path)
    else:
        wallet = "2022#01" # improve this later

    year = wallet[:4]
    try:
        if int(year) <= 1998: 
            #print(f'! - FORM scanupload - start {wallet} REDIRECT TO OLDWALLET')
            return(oldwallet(request, path))
    except:
        # if nonumeric wallet name for example
        return(oldwallet(request, path))
   
    
    if str(wallet).lower().endswith('indexpages'):
        # print(f'! - FORM scanupload - start {wallet} REDIRECT TO OLDWALLET')
        return(walletindex(request, path))

    if not re.match('(19|20)\d\d[:#]\d\d', wallet):
        wallet = "2022:01" # improve this later
    # print(f'! - FORM scanupload - start {wallet}')
    
    if path:
        pass
        # print(f'! - FORM scanupload - start wallet:{wallet}: path:{path}:')
    if int(year) < 1977: 
        year = "1977"
    if int(year) > 2050: 
        year = "2050"
    nexty = f'{int(year)+1}'
    prevy = f'{int(year)-1}'


    wnumber = wallet[5:]
    next = f'{int(wnumber)+1:02d}'
    prev = f'{int(wnumber)-1:02d}'
    
    if int(wnumber) == 0:
        prev = f'{int(wnumber):02d}'

    wurl = f"/scanupload/{wallet}".replace('#', ':')     
    wallet = wallet.replace(':','#')
    dirpath = Path(settings.SCANS_ROOT, year, wallet)
    contents_path = dirpath / contentsjson
    walletdata = dirpath / contentsjson
    
    form = FilesForm()
   
    if request.method == 'POST':
        if "psg" in request.POST:              
            formj = WalletForm(request.POST)
            # Beware. All fields returned as strings. Must re-type them as lists etc. before using or re-saving
            # Also lots of hassle with lists of strings interpreted as a single string
            # Unset checkboxes do not return any value, checked ones return "True". So need initialising to False
            if formj.is_valid():
                #print(f'--- JSON Update form is VALID, saving to {contents_path}')
                posted = request.POST.copy()
                posted.pop("csrfmiddlewaretoken") # discard this
                wd = wallet_blank_json
                for f in checkboxes:
                    wd[f] = False
                    #print(f'--- wd ${f}$  - {wd[f]}')
                for f in posted:
                    wd[xlate[f]] = posted[f].replace("\'", "\"")

                    if posted[f] =="True":
                        wd[xlate[f]] = True

                wd["people"] = wd["people"][1:-1].replace("\"", "").split(",")
                for i, elem in enumerate(wd["people"]):
                    wd["people"][i] = elem.strip()
                    
                #print(f'--- ${wd["survex file"]}$  - {type(wd["survex file"])}')
                if wd["survex file"]: # allow for no survex file at all
                    if wd["survex file"][0] == '[':
                        wd["survex file"] = wd["survex file"][1:-1]
                    wd["survex file"] = wd["survex file"].replace("\"", "").split(",")
                    for i, elem in enumerate(wd["survex file"]):
                       wd["survex file"][i] = elem.strip()
                    #print(f'--- {wd["survex file"]} - {type(wd["survex file"])}')

                with open(contents_path, "w") as jfile:
                    json.dump(wd, jfile, indent = 1)
                # print(f'--- FINISHED saving to JSON\n')
            else:
                print(f'--- INVALID JSON Update form submitted')
                print(formj.errors)
                return render(request,'errors/generic.html', {'message': formj.errors})

        else:
            form = FilesForm(request.POST,request.FILES)
     
            if form.is_valid():
                f = request.FILES["uploadfiles"]
                multiple = request.FILES.getlist('uploadfiles')
                fs = FileSystemStorage(os.path.join(dirpath)) # creates wallet folder if necessary
               
                actual_saved = []
                if multiple:
                    for f in multiple:
                        try: # crashes in Django os.chmod call if on WSL, but does save file!
                            saved_filename = fs.save(f.name, content=f) 
                        except:
                            print(f'\n !! Permissions failure ?! on attempting to save file {f.name}')
                            if 'saved_filename' in locals():
                                if saved_filename.is_file():
                                    actual_saved.append(saved_filename)
                                    # print(f'! - FORM scanupload multiple {actual_saved}')
                                    filesaved = True
                
                if not contents_path.is_file(): # double-check
                    with open(contents_path, "w") as json_file:
                        json.dump(wallet_blank_json, json_file, sort_keys=True, indent = 1) 
                index_path = dirpath / indexhtml
                if not index_path.is_file(): # double-check
                    thishtml = wallet_blank_html.replace("YEAR", str(year))
                    thishtml = thishtml.replace("WALLET", str(wallet))
                    with open(index_path, "w") as html_file:
                        html_file.write(thishtml ) 
      
    files = []
    dirs = []
    # print(f'! - FORM scanupload - start {wallet} {dirpath}')
    if dirpath.is_dir():
        create = False
        try:
            for f in dirpath.iterdir():
                if f.is_dir():
                    dirs.append(f.name)
                if f.is_file():
                    if f.name != 'contents.json' and f.name != 'walletindex.html':
                        files.append(f.name)
        except FileNotFoundError:
            files.append('(no wallet yet. It would be created if you upload a scan)')
    else:
           create = True
         
    if len(files) >0 :
        files = sorted(files)
        
    if dirs:
        dirs = sorted(dirs)
        
    waldata = {}   
    if contents_path.is_file():
        with open(contents_path) as json_file:
            try:
                waldata = json.load(json_file)
            except:
                message = f"! {wallet} Failed to load {contents_path} JSON file"
                print(message)
                DataIssue.objects.create(parser='scans', message=message, url=wurl)  # set URL to this wallet folder
                raise
    cave =""
    psg = ""
    chkplannr = ""
    chkpland = ""
    svxfiles = []
    checked = {}
    if waldata:
        if not waldata["people"]:
            waldata["people"]=["NOBODY"]
        if not type(waldata["people"])==list: 
            if waldata["people"][0] == '"':
                waldata["people"] = waldata["people"][1:-1]
            waldata["people"] = list(waldata["people"])

        if not waldata["description url"]:
            waldata["description url"]=""
        if waldata["cave"]:
            cave =  waldata["cave"] # text string
        if waldata["name"]:
            psg =  waldata["name"]

        
        #Survex and survex complaints
        complaints, caveobject = get_complaints([], waldata, svxfiles, files, wallet, wurl)

     
        for f in checkboxes:
             if waldata[f]:
                 checked[f] = "checked"
                 
        context = {'year': year, 'prev': prev, 'next': next, 'prevy': prevy, 'nexty': nexty,
                'files': files, 'dirs': dirs, 'waldata': waldata, 'svxfiles': svxfiles,
                'checked': checked,
                'create': create, 
                'complaints': complaints,
                'caveobject': caveobject,
                'people':  waldata["people"], 'peoplesize': str(len(str(waldata["people"]))),
                'filesaved': filesaved, 'actual_saved': actual_saved }

        return render(request, 'walletform.html', 
            {'form': form, 'wallet': wallet, **context, 
            'date': waldata["date"],
            'url':  waldata["description url"], 'urlsize': str(len(str(waldata["description url"]))),
            'survex': waldata["survex file"], 'survexsize': str(len(str(waldata["survex file"]))),
            'cave': cave, 'psg': psg, 'psgsize': str(max(12,len(str(psg))))})
    else: # no wallet here
        context = {'year': year, 'prev': prev, 'next': next, 'prevy': prevy, 'nexty': nexty,
                'files': files, 'dirs': dirs, 'waldata': waldata, 'svxfiles': svxfiles,
                'checked': checked,
                'create': create, 
                'people':  "", 'peoplesize': 12,
                'filesaved': filesaved, 'actual_saved': actual_saved }
        
        return render(request, 'walletform.html', 
            {'form': form, 'wallet': wallet, **context, 
            'date': "",
            'url':  "", 'urlsize': 12,
            'survex': "", 'survexsize': 12,
            'cave': cave, 'psg': psg, 'psgsize': 12})

@login_required_if_public
def photoupload(request, folder=None):
    '''Upload photo image files into /expofiles/photos/<year>/<photographer>/
    This does NOT use a Django model linked to a Django form. Just a simple Django form.
    You will find the Django documentation on forms very confusing, This is simpler.
    '''
    year = settings.PHOTOS_YEAR
    filesaved = False
    actual_saved = []
 
    context = {'year': year, 'placeholder': "AnathemaDevice"}
    
    yearpath = Path(settings.PHOTOS_ROOT, year)
    
    if folder == str(year) or folder == str(year) +"/":
        folder = None
    
    if folder is None:
        folder = "" # improve this later
        dirpath = Path(settings.PHOTOS_ROOT, year)
        urlfile = f'/expofiles/photos/{year}'
        urldir  = f'/photoupload/{year}'
    else: # it will contain the year as well as the photographer
        dirpath = Path(settings.PHOTOS_ROOT, folder)
        if dirpath.is_dir():
            urlfile = f'/expofiles/photos/{folder}'
            urldir  = Path('/photoupload') / folder
        else:
            folder = "" # improve this later
            dirpath = Path(settings.PHOTOS_ROOT, year)
            urlfile = f'/expofiles/photos/{year}'
            urldir  = f'/photoupload/{year}'
      
        
    form = FilesForm()
    formd = TextForm()  
     
    if request.method == 'POST':
        if "photographer" in request.POST:              
            formd = TextForm(request.POST)
            if formd.is_valid():
                newphotographer = request.POST["photographer"]
                (yearpath / newphotographer).mkdir(exist_ok=True)
        else:
            form = FilesForm(request.POST,request.FILES)
            if form.is_valid():
                f = request.FILES["uploadfiles"]
                multiple = request.FILES.getlist('uploadfiles')
                # NO CHECK that the files being uploaded are image files
                fs = FileSystemStorage(dirpath)
               
                actual_saved = []
                if multiple:
                    for f in multiple:
                        try: # crashes in Django os.chmod call if on WSL, but does save file!
                            saved_filename = fs.save(f.name, content=f) 
                        except:
                            print(f'\n !! Permissions failure ?! on attempting to save file {f.name}')
                            if 'saved_filename' in locals():
                                if saved_filename.is_file():
                                    actual_saved.append(saved_filename)
                                    filesaved = True    
    files = []
    dirs = []
    try:
        for f in dirpath.iterdir():
            if f.is_dir():
                dirs.append(f.name)
            if f.is_file():
                files.append(f.name)           
    except FileNotFoundError:
        files.append('(no folder yet - would be created)')
    if len(files) >0 :
        files = sorted(files)
        
    if dirs:
        dirs = sorted(dirs)

    return render(request, 'photouploadform.html', 
        {'form': form, **context, 'urlfile': urlfile, 'urldir': urldir,'folder': folder, 'files': files, 'dirs': dirs, 'filesaved': filesaved, 'actual_saved': actual_saved})

@login_required_if_public
def dwgupload(request, folder=None, gitdisable='no'):
    '''Upload DRAWING files (tunnel or therion) into the upload folder in :drawings
    AND registers it into the :drawings: git repo.
    
    This does NOT use a Django model linked to a Django form. Just a simple Django form.
    You will find the Django documentation on forms very confusing, This is simpler.
    
    Need to validate it as being a valid GPX file using an XML parser, not a dubious script or hack

    
    We use get_or_create instead of simply creating a new object in case someone uploads the same file
    several times in one session, and expects them to be overwritten in the database. Although
    the actual file will be duplicated in the filesystem with different random name ending.
    '''
    def dwgvalid(name):
        if name in [ '.gitignore', ]:
            return False
        if Path(name).suffix.lower() in ['.xml', '.th', '.th2', '', '.svg', '.txt']:
            return True # dangerous, we should check the actual file binary signature
        return False

    def dwgvaliddisp(name):
        '''OK to display, even if we are not going to allow a new one to be uploaded
        '''
        if name in [ '.gitignore', ]:
            return False
        if Path(name).suffix.lower() in ['.xml', '.th', '.th2', '', '.svg', '.txt', '.jpg', '.jpeg', '.png', '.pdf', '.top', '.topo']:
            return True # dangerous, we should check the actual file binary signature
        return False

    filesaved = False
    actual_saved = []
    refused = []
    doesnotexist = ''
    # print(f'! - FORM dwgupload - start "{folder}" - gitdisable "{gitdisable}"')
    if folder is None:
        folder = "" # improve this later
        dirpath = Path(settings.DRAWINGS_DATA)
        urlfile = '/dwgdataraw'
        urldir  = '/dwgupload'
    else:
        dirpath = Path(settings.DRAWINGS_DATA, folder)
        urlfile = Path('/dwgdataraw/') / folder
        urldir  = Path('/dwgupload/') / folder
    
    form = FilesForm()
    
    if request.method == 'POST':
        form = FilesForm(request.POST,request.FILES)
        if form.is_valid():
            f = request.FILES["uploadfiles"]
            multiple = request.FILES.getlist('uploadfiles')
            fs = FileSystemStorage(os.path.join(settings.DRAWINGS_DATA, folder))
           
            actual_saved = []
            refused = []
            
            # GIT see also core/views/expo.py editexpopage()
            # GIT see also core/models/cave.py writetrogglefile()
            if gitdisable != 'yes': # set in url 'dwguploadnogit/'
                git = settings.GIT
            else:
                git = 'echo'

            if multiple:
                for f in multiple:
                    if dwgvalid(f.name):
                        try: # crashes in Django os.chmod call if on WSL without metadata drvfs, but does save file!
                            saved_filename = fs.save(f.name, content=f) 
                        except:
                            print(f'\n !! Permissions failure ?! on attempting to save file {f.name}')
                            if 'saved_filename' in locals():
                                if saved_filename.is_file():
                                    actual_saved.append(saved_filename)
                                    if gitdisable != 'yes':
                                        dr_add = subprocess.run([git, "add", saved_filename], cwd=dirpath, capture_output=True, text=True)
                                    if dr_add.returncode != 0:
                                        msgdata = 'Ask a nerd to fix this.\n\n' + dr_add.stderr + '\n\n' + dr_add.stdout  + '\n\nreturn code: ' + str(dr_add.returncode)
                                        message = f'CANNOT git on server for this file {saved_filename}. Edits saved but not added to git.\n\n' + msgdata
                                        return render(request,'errors/generic.html', {'message': message})
                                    dwgfile, created = DrawingFile.objects.get_or_create(dwgpath=saved_filename, dwgname=Path(f.name).stem, filesize=f.size)  
                                    dwgfile.save()
                    else:
                        refused.append(f.name)
                        print(f'REFUSED {f.name}')
            if actual_saved: # maybe all were refused by the suffix test in dwgvalid()
                filesaved = True
                if len(actual_saved) > 1:
                    dots = "..."
                else:
                    dots = ""
                if gitdisable != 'yes':
                    dr_commit = subprocess.run([git, "commit", "-m", f'Drawings upload - {actual_saved[0]}{dots}'], cwd=dirpath, capture_output=True, text=True)
                    # This produces return code = 1 if it commits OK
                    if dr_commit.returncode != 0:
                        msgdata = 'Ask a nerd to fix this.\n\n' + dr_commit.stderr + '\n\n' + dr_commit.stdout  + '\n\nreturn code: ' + str(dr_commit.returncode)
                        message = f'Error code with git on server for this {actual_saved[0]}{dots}. Edits saved, added to git, but NOT committed.\n\n' + msgdata
                        return render(request,'errors/generic.html', {'message': message})

    files = []
    dirs = []
    # print(f'! - FORM dwgupload - start {folder} \n"{dirpath}" \n"{dirpath.parent}" \n"{dirpath.exists()}"')
    try:
        for f in dirpath.iterdir():
            if f.is_dir():
                if f.name not in ['.git' ]:
                    dirs.append(f.name)
                    continue
            if f.is_file():
                if dwgvaliddisp(f.name): 
                    files.append(f.name)
                    continue
    except FileNotFoundError:
        doesnotexist = True
    if files:
        files = sorted(files)
        
    if dirs:
        dirs = sorted(dirs)

    return render(request, 'dwguploadform.html', 
        {'form': form, 'doesnotexist': doesnotexist, 'urlfile': urlfile, 'urldir': urldir,'folder': folder, 'files': files, 'dirs': dirs, 'filesaved': filesaved, 'actual_saved': actual_saved, 'refused': refused})