Access url for interventions

* adds access_token as new attribute
* adds generating of access_token
* adds new form
* adds two new routes for sharing an intervention
* adds translation
* adds render_submit to BaseModalForm which triggers rendering the modal footer

intervention/views.py

@@ -4,7 +4,7 @@ from django.utils.translation import gettext_lazy as _
 from django.http import HttpRequest
 from django.shortcuts import render, get_object_or_404
 
-from intervention.forms import NewInterventionForm, EditInterventionForm
+from intervention.forms import NewInterventionForm, EditInterventionForm, ShareInterventionForm
 from intervention.models import Intervention
 from intervention.tables import InterventionTable
 from konova.contexts import BaseContext
@@ -198,3 +198,68 @@ def remove_view(request: HttpRequest, id: str):
     }
     context = BaseContext(request, context).context
     return render(request, template, context)
+
+
+@login_required
+def share_view(request: HttpRequest, id: str, token: str):
+    """ Performs sharing of an intervention
+
+    If token given in url is not valid, the user will be redirected to the dashboard
+
+    Args:
+        request (HttpRequest): The incoming request
+        id (str): Intervention's id
+        token (str): Access token for intervention
+
+    Returns:
+
+    """
+    user = request.user
+    intervention = get_object_or_404(Intervention, id=id)
+    # Check tokens
+    if intervention.access_token == token:
+        # Send different messages in case user has already been added to list of sharing users
+        if intervention.has_access(user):
+            messages.info(
+                request,
+                _("{} has already been shared with you").format(intervention.identifier)
+            )
+        else:
+            messages.success(
+                request,
+                _("{} has been shared with you").format(intervention.identifier)
+            )
+            intervention.users.add(user)
+        return redirect("intervention:open", id=id)
+    else:
+        messages.error(
+            request,
+            _("Share link invalid"),
+            extra_tags="danger",
+        )
+        return redirect("home")
+
+
+@login_required
+def create_share_view(request: HttpRequest, id: str):
+    """ Renders sharing form for an intervention
+
+    Args:
+        request (HttpRequest): The incoming request
+        id (str): Intervention's id
+
+    Returns:
+
+    """
+    user = request.user
+    intervention = get_object_or_404(Intervention, id=id)
+    form = ShareInterventionForm(request.POST or None, instance=intervention, request=request)
+    if request.method != "GET":
+        raise NotImplementedError
+    context = {
+        "form": form,
+    }
+    context = BaseContext(request, context).context
+    return render(request, form.template, context)
+
+