Skeleton of resetrequest function

dal/dal/templates/error.html

@@ -6,10 +6,12 @@ While trying to {{service}}, an error was encountered: {{error}}
 <br><br>
 You can try to:
 <br>
+{% if urlname %}
 <form action={% url urlname %} method="get">
 	<input type="submit" value="Go back and try again">
 </form>
 <br>or<br>
+{% endif %}
 <form action={% url 'index' %} method="get">
 	<input type="submit" value="Go to the indexpage">
 </form>

dal/dal/templates/resetpasswordnew.html

@@ -0,0 +1,14 @@
+<title> Set new password for {{user}} </title>
+
+<h2> Please set new password for {{user}} </h2>
+<br><br>
+<form action={% url 'reset' %} method="post">
+	{% csrf_token %}
+	New Password:<br>
+	<input type="password" name="password1" id="password1">
+	<br>Please confirm new password:<br>
+	<input type="password" name="password2" id="password2">
+	<br>
+	<input type="hidden" name="user" id="user" value="{{user}}">
+	<input type="submit" value="Submit">
+</form>

dal/dal/templates/send_resetrequest.html

@@ -2,7 +2,8 @@
 
 <h2> Reset request processed and confirmation email sent </h2>
 <br><br>
-You will shortly get the confirmation email at {{email}} to confirm that you wish to reset the password for {{user}}.
+You will shortly get the confirmation email to confirm that you wish to reset the password for {{user}}.<br>
+Please follow the link in the email to reset your password.
 <br><br>
 <form action={% url 'index' %} method="get">
 	<input type="submit" value="Back to indexpage">

dal/dal/urls.py

@@ -18,7 +18,7 @@ from django.urls import path
 from django.conf.urls import url
 from django.contrib import admin
 
-from .views import Register, ChangeData, ChangePassword, ResetPassword, DeleteAccount, Index, LogOut
+from .views import Register, ChangeData, ChangePassword, ResetPassword, DeleteAccount, Index, LogOut, ResetRequest
 
 urlpatterns = [
 #    path('admin/', admin.site.urls),
@@ -29,5 +29,7 @@ urlpatterns = [
     path('deleteaccount/', DeleteAccount.as_view(), name="account_delete"),
     path('index/', Index.as_view(), name="index"),
     path('logout/', LogOut.as_view(), name="logout"),
+    path('reset/<str:user>/<str:token>/', ResetRequest.as_view()),
+    path('reset/', ResetRequest.as_view(), name="reset"),
     path('', Index.as_view(), name="index"),
 ]

dal/dal/views.py

@@ -6,6 +6,9 @@ from django.http import HttpResponse, HttpResponseRedirect
 from django.core.validators import validate_email, ValidationError
 from django.urls import reverse_lazy
 from django_nameko import get_pool
+from django.contrib.auth.tokens import PasswordResetTokenGenerator
+from base64 import b64encode, b64decode
+from datetime import datetime
 
 # Check to see if the username is already taken
 # Helper function, not to be set up as a view
@@ -170,16 +173,96 @@ class ResetPassword(View):
         urlname = 'reset_password'
         service = 'send a password reset request'
         user = request.POST.get('user')
-        if check_user_exists(user):
-            # TODO: Get a good backend for reset requests
-            # Sending the reset request
-            email = self.send_resetrequest(user)
-            return render(request, 'send_resetrequest.html', { 'user': user, 'email': email } )
+        # First, check if the user exists
+        if not check_user_exists(user):
             return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'The user does not exist.' } )
+        # user exists, so try to get email
+        with get_pool().next() as rpc:
+            (state, tmp1, tmp2, email) = rpc.getuserdata.get_data(user)
+        # Either error with the datalookup or no email provided
+        if state == "error" or email == 'No email given' or not email:
+            return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': 'Unable to retrieve email address for user.' } )
+        # Try to send the email out
+        emailsend = self.email(user, email)
+        # Email got sent out
+        if emailsend == True:
+            return render(request, 'send_resetrequest.html', { 'user': user } )
+        # Error while trying to send email
+        else:
+            return render(request, 'error.html', { 'urlname': urlname, 'service': service, 'error': emailsend } )
+
+    def email(self, user, email):
+	#TODO figure out how to send email
+	email_from = 'Userservice at ungleich <userservice@ungleich.ch>'
+        to = '%s <%s>' % (user, email)
+        subject = 'Password reset request for %s' % user
+        no-reply = True
+        link = self.build_reset_link(user)
+        body = 'This is an automated email which was triggered by a reset request for the user %s.\n' % user
+        body += 'If you received this email in error, please disregard it. If you get multiple emails like this, please contact us to look into potential abuse.\n'
+        body += 'To reset your password, please follow the link below:\n'
+        body += '%s\n\n' % link
+	body += 'The link will remain active for 24 hours.\n'
+	# For debug
+        return link
+
+    def build_reset_link(self, user):
+        host = 'localhost:8000'
+	x = PasswordResetTokenGenerator()
+	token = x.make_token(user)
+	buser = bytes(user, 'utf-8')
+	userpart = b64encode(buser)
+	d = datetime.now()
+        # TODO Make Model und put it into the database
+        link = 'https://%s/reset/%s/%s/' % (host, userpart.decode('utf-8'), token)
+        return link
+
+
+# Catch the resetrequest and check it
+class ResetRequest(View):
+
+    # Gets the URL with user in b64 and the token, and checks it
+    # Also cleans the database
+    def get(self, request, user=None, token=None):
+        # Cleans up outdated tokens
+        self.clean_db()
+        if user == None or token == None:
+            return HttpResponse('Invalid URL.', status=404)
+        # extract user from b64 format
+        tmp_user = bytes(user, 'utf-8')
+        user = b64decode(tmp_user)
+        user_clean = user.decode('utf-8')
+        d = datetime.now()
+        #TODO write the model and check if token is still active and belongs to the user
+        # set checks_out = True if yes
+        if not checks_out:
+            return HttpResponse('Invalid URL.', status=404)
+        else:
+            return render(request, 'resetpasswordnew.html', { 'user': user_clean } )
+
+
+    # Gets the post form with the new password and sets it
+    def post(self, request):
+        service = 'reset the password'
+        password1 = request.POST.get("password1")
+        password2 = request.POST.get("password2")
+        user = request.POST.get("user")
+        if password1 == "" or not password1 or password2 == "" or not password2:
+            return render(request, 'error.html', { 'service': service, 'error': 'Please supply a password and confirm it.' } )
+        if password1 != password2:
+            return render(request, 'error.html', { 'service': service, 'error': 'The supplied passwords do not match.' } )
+        with get_pool().next() as rpc:
+            pwd = r'%s' % password1
+            result = rpc.changepassword.change_password(user, pwd)
+        if result == True:
+            return render(request, 'changedpassword.html', { 'user': user } )
+        else:
+            return render(request, 'error.html', { 'service': service, 'error': result } )
+
+    # Cleans up outdated tokens
+    def clean_db(self):
+        # TODO write the model and use this to clean tokens > 24h old
 
-    def send_resetrequest(self, user):
-        #TODO: call nameko to get the associated email and send a confirmation mail
-        return "test@example.com"
 
 
 # The logged in user can change the password here

nameko-func.py

@@ -222,19 +222,6 @@ class ChangeUserData(object):
         return True
 
 
-# Request a password reset
-# TODO: Set up a system for it
-# Basic idea: send email to customer with a confirmation request, set reply-to for something that handles it,
-class PasswordResetRequest(object):
-    name = "passwordresetrequest"
-    dispatch = EventDispatcher()
-
-    @rpc
-    def send_request(self, user):
-        # TODO: Find a good system for that
-        return "To be done"
-
-
 # change the password for the user
 class ChangePassword(object):
     name = "changepassword"