Esempio n. 1
0
    def dispatch(
        self, request, content_type_app_name, content_type_model_name, parent_page_id
    ):
        self.parent_page = get_object_or_404(Page, id=parent_page_id).specific
        self.parent_page_perms = self.parent_page.permissions_for_user(
            self.request.user
        )
        if not self.parent_page_perms.can_add_subpage():
            raise PermissionDenied

        try:
            self.page_content_type = ContentType.objects.get_by_natural_key(
                content_type_app_name, content_type_model_name
            )
        except ContentType.DoesNotExist:
            raise Http404

        # Get class
        self.page_class = self.page_content_type.model_class()

        # Make sure the class is a descendant of Page
        if not issubclass(self.page_class, Page):
            raise Http404

        # page must be in the list of allowed subpage types for this parent ID
        if self.page_class not in self.parent_page.creatable_subpage_models():
            raise PermissionDenied

        if not self.page_class.can_create_at(self.parent_page):
            raise PermissionDenied

        response = self.run_hook(
            "before_create_page", self.request, self.parent_page, self.page_class
        )
        if response:
            return response

        self.locale = self.parent_page.locale

        # If the parent page is the root page. The user may specify any locale they like
        if self.parent_page.is_root():
            selected_locale = request.GET.get("locale", None) or request.POST.get(
                "locale", None
            )
            if selected_locale:
                self.locale = get_object_or_404(Locale, language_code=selected_locale)

        self.page = self.page_class(owner=self.request.user)
        self.page.locale = self.locale
        self.edit_handler = self.page_class.get_edit_handler()
        self.form_class = self.edit_handler.get_form_class()

        # Note: Comment notifications should be enabled by default for pages that a user creates
        self.subscription = PageSubscription(
            page=self.page, user=self.request.user, comment_notifications=True
        )

        self.next_url = get_valid_next_url_from_request(self.request)

        return super().dispatch(request)
Esempio n. 2
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    def dispatch(self, request, page_id):
        self.real_page_record = get_object_or_404(Page, id=page_id)
        self.latest_revision = self.real_page_record.get_latest_revision()
        self.page_content_type = self.real_page_record.cached_content_type
        self.page_class = self.real_page_record.specific_class

        if self.page_class is None:
            raise PageClassNotFoundError(
                f"The page '{self.real_page_record}' cannot be edited because the "
                f"model class used to create it ({self.page_content_type.app_label}."
                f"{self.page_content_type.model}) can no longer be found in the codebase. "
                "This usually happens as a result of switching between git "
                "branches without running migrations to trigger the removal of "
                "unused ContentTypes. To edit the page, you will need to switch "
                "back to a branch where the model class is still present.")

        self.page = self.real_page_record.get_latest_revision_as_page()
        self.parent = self.page.get_parent()

        self.page_perms = self.page.permissions_for_user(self.request.user)

        if not self.page_perms.can_edit():
            raise PermissionDenied

        self.next_url = get_valid_next_url_from_request(self.request)

        response = self.run_hook("before_edit_page", self.request, self.page)
        if response:
            return response

        try:
            self.subscription = PageSubscription.objects.get(
                page=self.page, user=self.request.user)
        except PageSubscription.DoesNotExist:
            self.subscription = PageSubscription(page=self.page,
                                                 user=self.request.user,
                                                 comment_notifications=False)

        self.edit_handler = self.page_class.get_edit_handler()
        self.edit_handler = self.edit_handler.bind_to(instance=self.page,
                                                      request=self.request)
        self.form_class = self.edit_handler.get_form_class()

        if getattr(settings, "WAGTAIL_WORKFLOW_ENABLED", True):
            # Retrieve current workflow state if set, default to last workflow state
            self.workflow_state = (
                self.page.current_workflow_state
                or self.page.workflow_states.order_by("created_at").last())
        else:
            self.workflow_state = None

        if self.workflow_state:
            self.workflow_tasks = self.workflow_state.all_tasks_with_status()
        else:
            self.workflow_tasks = []

        self.errors_debug = None

        return super().dispatch(request)
Esempio n. 3
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class CreateView(TemplateResponseMixin, ContextMixin, HookResponseMixin, View):
    template_name = "wagtailadmin/pages/create.html"

    def dispatch(self, request, content_type_app_name, content_type_model_name,
                 parent_page_id):
        self.parent_page = get_object_or_404(Page, id=parent_page_id).specific
        self.parent_page_perms = self.parent_page.permissions_for_user(
            self.request.user)
        if not self.parent_page_perms.can_add_subpage():
            raise PermissionDenied

        try:
            self.page_content_type = ContentType.objects.get_by_natural_key(
                content_type_app_name, content_type_model_name)
        except ContentType.DoesNotExist:
            raise Http404

        # Get class
        self.page_class = self.page_content_type.model_class()

        # Make sure the class is a descendant of Page
        if not issubclass(self.page_class, Page):
            raise Http404

        # page must be in the list of allowed subpage types for this parent ID
        if self.page_class not in self.parent_page.creatable_subpage_models():
            raise PermissionDenied

        if not self.page_class.can_create_at(self.parent_page):
            raise PermissionDenied

        response = self.run_hook("before_create_page", self.request,
                                 self.parent_page, self.page_class)
        if response:
            return response

        self.locale = self.parent_page.locale

        # If the parent page is the root page. The user may specify any locale they like
        if self.parent_page.is_root():
            selected_locale = request.GET.get(
                "locale", None) or request.POST.get("locale", None)
            if selected_locale:
                self.locale = get_object_or_404(Locale,
                                                language_code=selected_locale)

        self.page = self.page_class(owner=self.request.user)
        self.page.locale = self.locale
        self.edit_handler = self.page_class.get_edit_handler()
        self.form_class = self.edit_handler.get_form_class()

        # Note: Comment notifications should be enabled by default for pages that a user creates
        self.subscription = PageSubscription(page=self.page,
                                             user=self.request.user,
                                             comment_notifications=True)

        self.next_url = get_valid_next_url_from_request(self.request)

        return super().dispatch(request)

    def post(self, request):
        self.form = self.form_class(
            self.request.POST,
            self.request.FILES,
            instance=self.page,
            subscription=self.subscription,
            parent_page=self.parent_page,
            for_user=self.request.user,
        )

        if self.form.is_valid():
            return self.form_valid(self.form)
        else:
            return self.form_invalid(self.form)

    def form_valid(self, form):
        if (bool(self.request.POST.get("action-publish"))
                and self.parent_page_perms.can_publish_subpage()):
            return self.publish_action()
        elif (bool(self.request.POST.get("action-submit"))
              and self.parent_page.has_workflow):
            return self.submit_action()
        else:
            return self.save_action()

    def get_edit_message_button(self):
        return messages.button(
            reverse("wagtailadmin_pages:edit", args=(self.page.id, )),
            _("Edit"))

    def get_view_draft_message_button(self):
        return messages.button(
            reverse("wagtailadmin_pages:view_draft", args=(self.page.id, )),
            _("View draft"),
            new_window=False,
        )

    def get_view_live_message_button(self):
        return messages.button(self.page.url, _("View live"), new_window=False)

    def save_action(self):
        self.page = self.form.save(commit=False)
        self.page.live = False

        # Save page
        self.parent_page.add_child(instance=self.page)

        # Save revision
        self.page.save_revision(user=self.request.user, log_action=False)

        # Save subscription settings
        self.subscription.page = self.page
        self.subscription.save()

        # Notification
        messages.success(
            self.request,
            _("Page '{0}' created.").format(
                self.page.get_admin_display_title()),
        )

        response = self.run_hook("after_create_page", self.request, self.page)
        if response:
            return response

        # remain on edit page for further edits
        return self.redirect_and_remain()

    def publish_action(self):
        self.page = self.form.save(commit=False)

        # Save page
        self.parent_page.add_child(instance=self.page)

        # Save revision
        revision = self.page.save_revision(user=self.request.user,
                                           log_action=False)

        # Save subscription settings
        self.subscription.page = self.page
        self.subscription.save()

        # Publish
        response = self.run_hook("before_publish_page", self.request,
                                 self.page)
        if response:
            return response

        revision.publish(user=self.request.user)

        # get a fresh copy so that any changes coming from revision.publish() are passed on
        self.page.refresh_from_db()

        response = self.run_hook("after_publish_page", self.request, self.page)
        if response:
            return response

        # Notification
        if self.page.go_live_at and self.page.go_live_at > timezone.now():
            messages.success(
                self.request,
                _("Page '{0}' created and scheduled for publishing.").format(
                    self.page.get_admin_display_title()),
                buttons=[self.get_edit_message_button()],
            )
        else:
            buttons = []
            if self.page.url is not None:
                buttons.append(self.get_view_live_message_button())
            buttons.append(self.get_edit_message_button())
            messages.success(
                self.request,
                _("Page '{0}' created and published.").format(
                    self.page.get_admin_display_title()),
                buttons=buttons,
            )

        response = self.run_hook("after_create_page", self.request, self.page)
        if response:
            return response

        return self.redirect_away()

    def submit_action(self):
        self.page = self.form.save(commit=False)
        self.page.live = False

        # Save page
        self.parent_page.add_child(instance=self.page)

        # Save revision
        self.page.save_revision(user=self.request.user, log_action=False)

        # Submit
        workflow = self.page.get_workflow()
        workflow.start(self.page, self.request.user)

        # Save subscription settings
        self.subscription.page = self.page
        self.subscription.save()

        # Notification
        buttons = []
        if self.page.is_previewable():
            buttons.append(self.get_view_draft_message_button())

        buttons.append(self.get_edit_message_button())

        messages.success(
            self.request,
            _("Page '{0}' created and submitted for moderation.").format(
                self.page.get_admin_display_title()),
            buttons=buttons,
        )

        response = self.run_hook("after_create_page", self.request, self.page)
        if response:
            return response

        return self.redirect_away()

    def redirect_away(self):
        if self.next_url:
            # redirect back to 'next' url if present
            return redirect(self.next_url)
        else:
            # redirect back to the explorer
            return redirect("wagtailadmin_explore", self.page.get_parent().id)

    def redirect_and_remain(self):
        target_url = reverse("wagtailadmin_pages:edit", args=[self.page.id])
        if self.next_url:
            # Ensure the 'next' url is passed through again if present
            target_url += "?next=%s" % quote(self.next_url)
        return redirect(target_url)

    def form_invalid(self, form):
        messages.validation_error(
            self.request,
            _("The page could not be created due to validation errors"),
            self.form,
        )
        self.has_unsaved_changes = True

        return self.render_to_response(self.get_context_data())

    def get(self, request):
        signals.init_new_page.send(sender=CreateView,
                                   page=self.page,
                                   parent=self.parent_page)
        self.form = self.form_class(
            instance=self.page,
            subscription=self.subscription,
            parent_page=self.parent_page,
            for_user=self.request.user,
        )
        self.has_unsaved_changes = False

        return self.render_to_response(self.get_context_data())

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        bound_panel = self.edit_handler.get_bound_panel(request=self.request,
                                                        instance=self.page,
                                                        form=self.form)
        action_menu = PageActionMenu(self.request,
                                     view="create",
                                     parent_page=self.parent_page)

        context.update({
            "content_type":
            self.page_content_type,
            "page_class":
            self.page_class,
            "parent_page":
            self.parent_page,
            "edit_handler":
            bound_panel,
            "action_menu":
            action_menu,
            "preview_modes":
            self.page.preview_modes,
            "form":
            self.form,
            "next":
            self.next_url,
            "has_unsaved_changes":
            self.has_unsaved_changes,
            "locale":
            None,
            "translations": [],
            "media":
            bound_panel.media + self.form.media + action_menu.media,
        })

        if getattr(settings, "WAGTAIL_I18N_ENABLED", False):
            # Pages can be created in any language at the root level
            if self.parent_page.is_root():
                translations = [{
                    "locale":
                    locale,
                    "url":
                    reverse(
                        "wagtailadmin_pages:add",
                        args=[
                            self.page_content_type.app_label,
                            self.page_content_type.model,
                            self.parent_page.id,
                        ],
                    ) + "?" + urlencode({"locale": locale.language_code}),
                } for locale in Locale.objects.all()]

            else:
                user_perms = UserPagePermissionsProxy(self.request.user)
                translations = [
                    {
                        "locale":
                        translation.locale,
                        "url":
                        reverse(
                            "wagtailadmin_pages:add",
                            args=[
                                self.page_content_type.app_label,
                                self.page_content_type.model,
                                translation.id,
                            ],
                        ),
                    } for translation in self.parent_page.get_translations(
                    ).only("id", "locale").select_related("locale")
                    if user_perms.for_page(translation).can_add_subpage()
                    and self.page_class in
                    translation.specific_class.creatable_subpage_models()
                    and self.page_class.can_create_at(translation)
                ]

            context.update({
                "locale": self.locale,
                "translations": translations,
            })

        return context
Esempio n. 4
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class EditView(TemplateResponseMixin, ContextMixin, HookResponseMixin, View):
    def get_template_names(self):
        if self.page.alias_of_id:
            return ["wagtailadmin/pages/edit_alias.html"]

        else:
            return ["wagtailadmin/pages/edit.html"]

    def add_legacy_moderation_warning(self):
        # Check for revisions still undergoing moderation and warn - this is for the old moderation system
        if self.latest_revision and self.latest_revision.submitted_for_moderation:
            buttons = []

            if self.page.live:
                buttons.append(self.get_compare_with_live_message_button())

            messages.warning(
                self.request,
                _("This page is currently awaiting moderation"),
                buttons=buttons,
            )

    def add_save_confirmation_message(self):
        if self.is_reverting:
            message = _(
                "Page '{0}' has been replaced with version from {1}.").format(
                    self.page.get_admin_display_title(),
                    self.previous_revision.created_at.strftime(
                        "%d %b %Y %H:%M"),
                )
        else:
            message = _("Page '{0}' has been updated.").format(
                self.page.get_admin_display_title())

        messages.success(self.request, message)

    def get_commenting_changes(self):
        """
        Finds comments that have been changed during this request.

        Returns a tuple of 5 lists:
         - New comments
         - Deleted comments
         - Resolved comments
         - Edited comments
         - Replied comments (dict containing the instance and list of replies)
        """
        # Get changes
        comments_formset = self.form.formsets["comments"]
        new_comments = comments_formset.new_objects
        deleted_comments = comments_formset.deleted_objects

        # Assume any changed comments that are resolved were only just resolved
        resolved_comments = []
        edited_comments = []
        for changed_comment, changed_fields in comments_formset.changed_objects:
            if changed_comment.resolved_at and "resolved" in changed_fields:
                resolved_comments.append(changed_comment)

            if "text" in changed_fields:
                edited_comments.append(changed_comment)

        new_replies = []
        deleted_replies = []
        edited_replies = []
        for comment_form in comments_formset.forms:
            # New
            replies = getattr(comment_form.formsets["replies"], "new_objects",
                              [])
            if replies:
                new_replies.append((comment_form.instance, replies))

            # Deleted
            replies = getattr(comment_form.formsets["replies"],
                              "deleted_objects", [])
            if replies:
                deleted_replies.append((comment_form.instance, replies))

            # Edited
            replies = getattr(comment_form.formsets["replies"],
                              "changed_objects", [])
            replies = [
                reply for reply, changed_fields in replies
                if "text" in changed_fields
            ]
            if replies:
                edited_replies.append((comment_form.instance, replies))

        return {
            "new_comments": new_comments,
            "deleted_comments": deleted_comments,
            "resolved_comments": resolved_comments,
            "edited_comments": edited_comments,
            "new_replies": new_replies,
            "deleted_replies": deleted_replies,
            "edited_replies": edited_replies,
        }

    def send_commenting_notifications(self, changes):
        """
        Sends notifications about any changes to comments to anyone who is subscribed.
        """
        relevant_comment_ids = []
        relevant_comment_ids.extend(
            comment.pk for comment in changes["resolved_comments"])
        relevant_comment_ids.extend(
            comment.pk for comment, replies in changes["new_replies"])

        # Skip if no changes were made
        # Note: We don't email about edited comments so ignore those here
        if (not changes["new_comments"] and not changes["deleted_comments"]
                and not changes["resolved_comments"]
                and not changes["new_replies"]):
            return

        # Get global page comment subscribers
        subscribers = PageSubscription.objects.filter(
            page=self.page, comment_notifications=True).select_related("user")
        global_recipient_users = [
            subscriber.user for subscriber in subscribers
            if subscriber.user != self.request.user
        ]

        # Get subscribers to individual threads
        replies = CommentReply.objects.filter(
            comment_id__in=relevant_comment_ids)
        comments = Comment.objects.filter(id__in=relevant_comment_ids)
        thread_users = (get_user_model().objects.exclude(
            pk=self.request.user.pk
        ).exclude(pk__in=subscribers.values_list("user_id", flat=True)).filter(
            Q(comment_replies__comment_id__in=relevant_comment_ids)
            | Q(**{
                ("%s__pk__in" % COMMENTS_RELATION_NAME): relevant_comment_ids
            })).prefetch_related(
                Prefetch("comment_replies", queryset=replies),
                Prefetch(COMMENTS_RELATION_NAME, queryset=comments),
            ))

        # Skip if no recipients
        if not (global_recipient_users or thread_users):
            return
        thread_users = [(
            user,
            set(
                list(user.comment_replies.values_list("comment_id", flat=True))
                + list(
                    getattr(user, COMMENTS_RELATION_NAME).values_list(
                        "pk", flat=True))),
        ) for user in thread_users]
        mailed_users = set()

        for current_user, current_threads in thread_users:
            # We are trying to avoid calling send_notification for each user for performance reasons
            # so group the users receiving the same thread notifications together here
            if current_user in mailed_users:
                continue
            users = [current_user]
            mailed_users.add(current_user)
            for user, threads in thread_users:
                if user not in mailed_users and threads == current_threads:
                    users.append(user)
                    mailed_users.add(user)
            send_notification(
                users,
                "updated_comments",
                {
                    "page":
                    self.page,
                    "editor":
                    self.request.user,
                    "new_comments": [
                        comment for comment in changes["new_comments"]
                        if comment.pk in threads
                    ],
                    "resolved_comments": [
                        comment for comment in changes["resolved_comments"]
                        if comment.pk in threads
                    ],
                    "deleted_comments": [],
                    "replied_comments": [{
                        "comment": comment,
                        "replies": replies,
                    } for comment, replies in changes["new_replies"]
                                         if comment.pk in threads],
                },
            )

        return send_notification(
            global_recipient_users,
            "updated_comments",
            {
                "page":
                self.page,
                "editor":
                self.request.user,
                "new_comments":
                changes["new_comments"],
                "resolved_comments":
                changes["resolved_comments"],
                "deleted_comments":
                changes["deleted_comments"],
                "replied_comments": [{
                    "comment": comment,
                    "replies": replies,
                } for comment, replies in changes["new_replies"]],
            },
        )

    def log_commenting_changes(self, changes, revision):
        """
        Generates log entries for any changes made to comments or replies.
        """
        for comment in changes["new_comments"]:
            comment.log_create(page_revision=revision, user=self.request.user)

        for comment in changes["edited_comments"]:
            comment.log_edit(page_revision=revision, user=self.request.user)

        for comment in changes["resolved_comments"]:
            comment.log_resolve(page_revision=revision, user=self.request.user)

        for comment in changes["deleted_comments"]:
            comment.log_delete(page_revision=revision, user=self.request.user)

        for comment, replies in changes["new_replies"]:
            for reply in replies:
                reply.log_create(page_revision=revision,
                                 user=self.request.user)

        for comment, replies in changes["edited_replies"]:
            for reply in replies:
                reply.log_edit(page_revision=revision, user=self.request.user)

        for comment, replies in changes["deleted_replies"]:
            for reply in replies:
                reply.log_delete(page_revision=revision,
                                 user=self.request.user)

    def get_edit_message_button(self):
        return messages.button(
            reverse("wagtailadmin_pages:edit", args=(self.page.id, )),
            _("Edit"))

    def get_view_draft_message_button(self):
        return messages.button(
            reverse("wagtailadmin_pages:view_draft", args=(self.page.id, )),
            _("View draft"),
            new_window=False,
        )

    def get_view_live_message_button(self):
        return messages.button(self.page.url, _("View live"), new_window=False)

    def get_compare_with_live_message_button(self):
        return messages.button(
            reverse(
                "wagtailadmin_pages:revisions_compare",
                args=(self.page.id, "live", self.latest_revision.id),
            ),
            _("Compare with live version"),
        )

    def get_page_for_status(self):
        if self.page.live and self.page.has_unpublished_changes:
            # Page status needs to present the version of the page containing the correct live URL
            return self.real_page_record.specific
        else:
            return self.page

    def dispatch(self, request, page_id):
        self.real_page_record = get_object_or_404(Page, id=page_id)
        self.latest_revision = self.real_page_record.get_latest_revision()
        self.page_content_type = self.real_page_record.cached_content_type
        self.page_class = self.real_page_record.specific_class

        if self.page_class is None:
            raise PageClassNotFoundError(
                f"The page '{self.real_page_record}' cannot be edited because the "
                f"model class used to create it ({self.page_content_type.app_label}."
                f"{self.page_content_type.model}) can no longer be found in the codebase. "
                "This usually happens as a result of switching between git "
                "branches without running migrations to trigger the removal of "
                "unused ContentTypes. To edit the page, you will need to switch "
                "back to a branch where the model class is still present.")

        self.page = self.real_page_record.get_latest_revision_as_page()
        self.parent = self.page.get_parent()

        self.page_perms = self.page.permissions_for_user(self.request.user)

        if not self.page_perms.can_edit():
            raise PermissionDenied

        self.next_url = get_valid_next_url_from_request(self.request)

        response = self.run_hook("before_edit_page", self.request, self.page)
        if response:
            return response

        try:
            self.subscription = PageSubscription.objects.get(
                page=self.page, user=self.request.user)
        except PageSubscription.DoesNotExist:
            self.subscription = PageSubscription(page=self.page,
                                                 user=self.request.user,
                                                 comment_notifications=False)

        self.edit_handler = self.page_class.get_edit_handler()
        self.form_class = self.edit_handler.get_form_class()

        if getattr(settings, "WAGTAIL_WORKFLOW_ENABLED", True):
            # Retrieve current workflow state if set, default to last workflow state
            self.workflow_state = (
                self.page.current_workflow_state
                or self.page.workflow_states.order_by("created_at").last())
        else:
            self.workflow_state = None

        if self.workflow_state:
            self.workflow_tasks = self.workflow_state.all_tasks_with_status()
        else:
            self.workflow_tasks = []

        self.errors_debug = None

        return super().dispatch(request)

    def get(self, request):
        if self.page_perms.user_has_lock():
            if self.page.locked_at:
                lock_message = format_html(
                    _("<b>Page '{}' was locked</b> by <b>you</b> on <b>{}</b>."
                      ),
                    self.page.get_admin_display_title(),
                    self.page.locked_at.strftime("%d %b %Y %H:%M"),
                )
            else:
                lock_message = format_html(
                    _("<b>Page '{}' is locked</b> by <b>you</b>."),
                    self.page.get_admin_display_title(),
                )

            lock_message += format_html(
                '<span class="buttons"><button type="button" class="button button-small button-secondary" data-action-lock-unlock data-url="{}">{}</button></span>',
                reverse("wagtailadmin_pages:unlock", args=(self.page.id, )),
                _("Unlock"),
            )
            messages.warning(self.request, lock_message, extra_tags="lock")

        elif self.page.locked and self.page_perms.page_locked():
            # the page can also be locked at a permissions level if in a workflow, on a task the user is not a reviewer for
            # this should be indicated separately
            if self.page.locked_by and self.page.locked_at:
                lock_message = format_html(
                    _("<b>Page '{}' was locked</b> by <b>{}</b> on <b>{}</b>."
                      ),
                    self.page.get_admin_display_title(),
                    str(self.page.locked_by),
                    self.page.locked_at.strftime("%d %b %Y %H:%M"),
                )
            else:
                # Page was probably locked with an old version of Wagtail, or a script
                lock_message = format_html(
                    _("<b>Page '{}' is locked</b>."),
                    self.page.get_admin_display_title(),
                )

            if self.page_perms.can_unlock():
                lock_message += format_html(
                    '<span class="buttons"><button type="button" class="button button-small button-secondary" data-action-lock-unlock data-url="{}">{}</button></span>',
                    reverse("wagtailadmin_pages:unlock",
                            args=(self.page.id, )),
                    _("Unlock"),
                )
            messages.error(self.request, lock_message, extra_tags="lock")

        if self.page.current_workflow_state:
            workflow = self.workflow_state.workflow
            task = self.workflow_state.current_task_state.task
            if (self.workflow_state.status !=
                    WorkflowState.STATUS_NEEDS_CHANGES
                    and task.specific.page_locked_for_user(
                        self.page, self.request.user)):
                # Check for revisions still undergoing moderation and warn
                if len(self.workflow_tasks) == 1:
                    # If only one task in workflow, show simple message
                    workflow_info = _(
                        "This page is currently awaiting moderation.")
                else:
                    workflow_info = format_html(
                        _("This page is awaiting <b>'{}'</b> in the <b>'{}'</b> workflow."
                          ),
                        task.name,
                        workflow.name,
                    )
                messages.error(
                    self.request,
                    mark_safe(
                        workflow_info + " " +
                        _("Only reviewers for this task can edit the page.")),
                    extra_tags="lock",
                )

        self.form = self.form_class(
            instance=self.page,
            subscription=self.subscription,
            parent_page=self.parent,
            for_user=self.request.user,
        )
        self.has_unsaved_changes = False
        self.add_legacy_moderation_warning()
        self.page_for_status = self.get_page_for_status()

        return self.render_to_response(self.get_context_data())

    def add_cancel_workflow_confirmation_message(self):
        message = _("Workflow on page '{0}' has been cancelled.").format(
            self.page.get_admin_display_title())

        messages.success(
            self.request,
            message,
            buttons=[
                self.get_view_draft_message_button(),
                self.get_edit_message_button(),
            ],
        )

    def post(self, request):
        # Don't allow POST requests if the page is an alias
        if self.page.alias_of_id:
            # Return 405 "Method Not Allowed" response
            return HttpResponse(status=405)

        self.form = self.form_class(
            self.request.POST,
            self.request.FILES,
            instance=self.page,
            subscription=self.subscription,
            parent_page=self.parent,
            for_user=self.request.user,
        )

        self.is_cancelling_workflow = (
            bool(self.request.POST.get("action-cancel-workflow"))
            and self.workflow_state
            and self.workflow_state.user_can_cancel(self.request.user))

        if self.form.is_valid() and not self.page_perms.page_locked():
            return self.form_valid(self.form)
        else:
            return self.form_invalid(self.form)

    def workflow_action_is_valid(self):
        self.workflow_action = self.request.POST["workflow-action-name"]
        available_actions = self.page.current_workflow_task.get_actions(
            self.page, self.request.user)
        available_action_names = [
            name for name, verbose_name, modal in available_actions
        ]
        return self.workflow_action in available_action_names

    def form_valid(self, form):
        self.is_reverting = bool(self.request.POST.get("revision"))
        # If a revision ID was passed in the form, get that revision so its
        # date can be referenced in notification messages
        if self.is_reverting:
            self.previous_revision = get_object_or_404(
                self.page.revisions, id=self.request.POST.get("revision"))

        self.has_content_changes = self.form.has_changed()

        if self.request.POST.get(
                "action-publish") and self.page_perms.can_publish():
            return self.publish_action()
        elif (self.request.POST.get("action-submit")
              and self.page_perms.can_submit_for_moderation()):
            return self.submit_action()
        elif (self.request.POST.get("action-restart-workflow")
              and self.page_perms.can_submit_for_moderation()
              and self.workflow_state
              and self.workflow_state.user_can_cancel(self.request.user)):
            return self.restart_workflow_action()
        elif (self.request.POST.get("action-workflow-action")
              and self.workflow_action_is_valid()):
            return self.perform_workflow_action()
        elif self.is_cancelling_workflow:
            return self.cancel_workflow_action()
        else:
            return self.save_action()

    def save_action(self):
        self.page = self.form.save(commit=False)
        self.subscription.save()

        # Save revision
        revision = self.page.save_revision(
            user=self.request.user,
            log_action=True,  # Always log the new revision on edit
            previous_revision=(self.previous_revision
                               if self.is_reverting else None),
        )

        self.add_save_confirmation_message()

        if self.has_content_changes and "comments" in self.form.formsets:
            changes = self.get_commenting_changes()
            self.log_commenting_changes(changes, revision)
            self.send_commenting_notifications(changes)

        response = self.run_hook("after_edit_page", self.request, self.page)
        if response:
            return response

        # Just saving - remain on edit page for further edits
        return self.redirect_and_remain()

    def publish_action(self):
        self.page = self.form.save(commit=False)
        self.subscription.save()

        # Save revision
        revision = self.page.save_revision(
            user=self.request.user,
            log_action=True,  # Always log the new revision on edit
            previous_revision=(self.previous_revision
                               if self.is_reverting else None),
        )

        # store submitted go_live_at for messaging below
        go_live_at = self.page.go_live_at

        response = self.run_hook("before_publish_page", self.request,
                                 self.page)
        if response:
            return response

        action = PublishPageRevisionAction(
            revision,
            user=self.request.user,
            changed=self.has_content_changes,
            previous_revision=(self.previous_revision
                               if self.is_reverting else None),
        )
        action.execute(skip_permission_checks=True)

        if self.has_content_changes and "comments" in self.form.formsets:
            changes = self.get_commenting_changes()
            self.log_commenting_changes(changes, revision)
            self.send_commenting_notifications(changes)

        # Need to reload the page because the URL may have changed, and we
        # need the up-to-date URL for the "View Live" button.
        self.page = self.page.specific_class.objects.get(pk=self.page.pk)

        response = self.run_hook("after_publish_page", self.request, self.page)
        if response:
            return response

        # Notifications
        if go_live_at and go_live_at > timezone.now():
            # Page has been scheduled for publishing in the future

            if self.is_reverting:
                message = _(
                    "Version from {0} of page '{1}' has been scheduled for publishing."
                ).format(
                    self.previous_revision.created_at.strftime(
                        "%d %b %Y %H:%M"),
                    self.page.get_admin_display_title(),
                )
            else:
                if self.page.live:
                    message = _(
                        "Page '{0}' is live and this version has been scheduled for publishing."
                    ).format(self.page.get_admin_display_title())

                else:
                    message = _("Page '{0}' has been scheduled for publishing."
                                ).format(self.page.get_admin_display_title())

            messages.success(self.request,
                             message,
                             buttons=[self.get_edit_message_button()])

        else:
            # Page is being published now

            if self.is_reverting:
                message = _(
                    "Version from {0} of page '{1}' has been published."
                ).format(
                    self.previous_revision.created_at.strftime(
                        "%d %b %Y %H:%M"),
                    self.page.get_admin_display_title(),
                )
            else:
                message = _("Page '{0}' has been published.").format(
                    self.page.get_admin_display_title())

            buttons = []
            if self.page.url is not None:
                buttons.append(self.get_view_live_message_button())
            buttons.append(self.get_edit_message_button())
            messages.success(self.request, message, buttons=buttons)

        response = self.run_hook("after_edit_page", self.request, self.page)
        if response:
            return response

        # we're done here - redirect back to the explorer
        return self.redirect_away()

    def submit_action(self):
        self.page = self.form.save(commit=False)
        self.subscription.save()

        # Save revision
        revision = self.page.save_revision(
            user=self.request.user,
            log_action=True,  # Always log the new revision on edit
            previous_revision=(self.previous_revision
                               if self.is_reverting else None),
        )

        if self.has_content_changes and "comments" in self.form.formsets:
            changes = self.get_commenting_changes()
            self.log_commenting_changes(changes, revision)
            self.send_commenting_notifications(changes)

        if (self.workflow_state and self.workflow_state.status
                == WorkflowState.STATUS_NEEDS_CHANGES):
            # If the workflow was in the needs changes state, resume the existing workflow on submission
            self.workflow_state.resume(self.request.user)
        else:
            # Otherwise start a new workflow
            workflow = self.page.get_workflow()
            workflow.start(self.page, self.request.user)

        message = _("Page '{0}' has been submitted for moderation.").format(
            self.page.get_admin_display_title())

        messages.success(
            self.request,
            message,
            buttons=[
                self.get_view_draft_message_button(),
                self.get_edit_message_button(),
            ],
        )

        response = self.run_hook("after_edit_page", self.request, self.page)
        if response:
            return response

        # we're done here - redirect back to the explorer
        return self.redirect_away()

    def restart_workflow_action(self):
        self.page = self.form.save(commit=False)
        self.subscription.save()

        # save revision
        revision = self.page.save_revision(
            user=self.request.user,
            log_action=True,  # Always log the new revision on edit
            previous_revision=(self.previous_revision
                               if self.is_reverting else None),
        )

        if self.has_content_changes and "comments" in self.form.formsets:
            changes = self.get_commenting_changes()
            self.log_commenting_changes(changes, revision)
            self.send_commenting_notifications(changes)

        # cancel workflow
        self.workflow_state.cancel(user=self.request.user)
        # start new workflow
        workflow = self.page.get_workflow()
        workflow.start(self.page, self.request.user)

        message = _("Workflow on page '{0}' has been restarted.").format(
            self.page.get_admin_display_title())

        messages.success(
            self.request,
            message,
            buttons=[
                self.get_view_draft_message_button(),
                self.get_edit_message_button(),
            ],
        )

        response = self.run_hook("after_edit_page", self.request, self.page)
        if response:
            return response

        # we're done here - redirect back to the explorer
        return self.redirect_away()

    def perform_workflow_action(self):
        self.page = self.form.save(commit=False)
        self.subscription.save()

        if self.has_content_changes:
            # Save revision
            revision = self.page.save_revision(
                user=self.request.user,
                log_action=True,  # Always log the new revision on edit
                previous_revision=(self.previous_revision
                                   if self.is_reverting else None),
            )

            if "comments" in self.form.formsets:
                changes = self.get_commenting_changes()
                self.log_commenting_changes(changes, revision)
                self.send_commenting_notifications(changes)

        extra_workflow_data_json = self.request.POST.get(
            "workflow-action-extra-data", "{}")
        extra_workflow_data = json.loads(extra_workflow_data_json)
        self.page.current_workflow_task.on_action(
            self.page.current_workflow_task_state,
            self.request.user,
            self.workflow_action,
            **extra_workflow_data,
        )

        self.add_save_confirmation_message()

        response = self.run_hook("after_edit_page", self.request, self.page)
        if response:
            return response

        # we're done here - redirect back to the explorer
        return self.redirect_away()

    def cancel_workflow_action(self):
        self.workflow_state.cancel(user=self.request.user)
        self.page = self.form.save(commit=False)
        self.subscription.save()

        # Save revision
        revision = self.page.save_revision(
            user=self.request.user,
            log_action=True,  # Always log the new revision on edit
            previous_revision=(self.previous_revision
                               if self.is_reverting else None),
        )

        if self.has_content_changes and "comments" in self.form.formsets:
            changes = self.get_commenting_changes()
            self.log_commenting_changes(changes, revision)
            self.send_commenting_notifications(changes)

        # Notifications
        self.add_cancel_workflow_confirmation_message()

        response = self.run_hook("after_edit_page", self.request, self.page)
        if response:
            return response

        # Just saving - remain on edit page for further edits
        return self.redirect_and_remain()

    def redirect_away(self):
        if self.next_url:
            # redirect back to 'next' url if present
            return redirect(self.next_url)
        else:
            # redirect back to the explorer
            return redirect("wagtailadmin_explore", self.page.get_parent().id)

    def redirect_and_remain(self):
        target_url = reverse("wagtailadmin_pages:edit", args=[self.page.id])
        if self.next_url:
            # Ensure the 'next' url is passed through again if present
            target_url += "?next=%s" % quote(self.next_url)
        return redirect(target_url)

    def form_invalid(self, form):
        # even if the page is locked due to not having permissions, the original submitter can still cancel the workflow
        if self.is_cancelling_workflow:
            self.workflow_state.cancel(user=self.request.user)
            self.add_cancel_workflow_confirmation_message()

        if self.page_perms.page_locked():
            messages.error(self.request,
                           _("The page could not be saved as it is locked"))
        else:
            messages.validation_error(
                self.request,
                _("The page could not be saved due to validation errors"),
                self.form,
            )
        self.errors_debug = repr(self.form.errors) + repr([
            (name, formset.errors)
            for (name, formset) in self.form.formsets.items() if formset.errors
        ])
        self.has_unsaved_changes = True

        self.add_legacy_moderation_warning()
        self.page_for_status = self.get_page_for_status()

        return self.render_to_response(self.get_context_data())

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        bound_panel = self.edit_handler.get_bound_panel(instance=self.page,
                                                        request=self.request,
                                                        form=self.form)
        action_menu = PageActionMenu(self.request, view="edit", page=self.page)
        side_panels = PageSidePanels(self.request, self.page_for_status)

        context.update({
            "page":
            self.page,
            "page_for_status":
            self.page_for_status,
            "content_type":
            self.page_content_type,
            "edit_handler":
            bound_panel,
            "errors_debug":
            self.errors_debug,
            "action_menu":
            action_menu,
            "side_panels":
            side_panels,
            "preview_modes":
            self.page.preview_modes,
            "form":
            self.form,
            "next":
            self.next_url,
            "has_unsaved_changes":
            self.has_unsaved_changes,
            "page_locked":
            self.page_perms.page_locked(),
            "workflow_state":
            self.workflow_state
            if self.workflow_state and self.workflow_state.is_active else None,
            "current_task_state":
            self.page.current_workflow_task_state,
            "publishing_will_cancel_workflow":
            self.workflow_tasks
            and getattr(settings, "WAGTAIL_WORKFLOW_CANCEL_ON_PUBLISH", True),
            "locale":
            None,
            "translations": [],
            "media":
            bound_panel.media + self.form.media + action_menu.media +
            side_panels.media,
        })

        if getattr(settings, "WAGTAIL_I18N_ENABLED", False):
            user_perms = UserPagePermissionsProxy(self.request.user)

            context.update({
                "locale":
                self.page.locale,
                "translations":
                [{
                    "locale":
                    translation.locale,
                    "url":
                    reverse("wagtailadmin_pages:edit", args=[translation.id]),
                } for translation in self.page.get_translations().only(
                    "id", "locale", "depth").select_related("locale")
                 if user_perms.for_page(translation).can_edit()],
            })

        return context