verification check on user is already in an incident

src/firefighter/slack/views/modals/critical.py

@@ -8,7 +8,9 @@
 from slack_sdk.models.views import View
 
 from firefighter.incidents.forms.create_incident import CreateIncidentForm
+from firefighter.incidents.models.incident_membership import IncidentMembership
 from firefighter.slack.slack_app import SlackApp
+from firefighter.slack.utils import respond
 from firefighter.slack.views.modals.base_modal.base import ModalForm
 
 if TYPE_CHECKING:
@@ -91,6 +93,11 @@ def build_modal_fn(self, **kwargs: Any) -> View:
     def handle_modal_fn(  # type: ignore
         self, ack: Ack, body: dict[str, Any], user: User
     ) -> None :
+        if not self.is_user_member_of_incident(user):
+            ack()
+            respond(body, text=":x: You must be linked to an incident to use this command.")
+            return
+
         slack_form = self.handle_form_errors(
             ack, body, forms_kwargs={},
         )
@@ -116,5 +123,8 @@ def handle_modal_fn(  # type: ignore
             logger.warning("Form is empty, no data captured.")
             return
 
+    def is_user_member_of_incident(self, user: User) -> bool:
+        return IncidentMembership.objects.filter(user=user).exists()
+
 
 modal_critical = CriticalModal()