add leavedescription quest

src/c3nav/editor/templates/editor/quest_form.html

@@ -5,11 +5,9 @@
 <main class="account">
     <h3>{{ title }}</h3>
 
-    {% if back_url %}
-        <p>
-            <a href="{{ back_url }}">&laquo; {% trans 'back' %}</a>
-        </p>
-    {% endif %}
+    {% for line in description %}
+        <p>{{ line }}</p>
+    {% endfor %}
 
     <form method="post" action="{{ request.path_info }}">
         {% csrf_token %}

src/c3nav/editor/views/quest.py

@@ -34,6 +34,7 @@ class QuestFormView(FormView):
         return {
             **super().get_context_data(**kwargs),
             "title": self.quest.quest_type_label,
+            "description": self.quest.quest_description,
         }
 
     def form_valid(self, form):

src/c3nav/mapdata/quests/base.py

@@ -17,6 +17,10 @@ from c3nav.mapdata.models.access import AccessPermission
 class Quest:
     obj: Any
 
+    @property
+    def quest_description(self) -> list[str]:
+        return []
+
     @property
     def point(self) -> dict:
         raise NotImplementedError
@@ -38,7 +42,7 @@ class Quest:
         return [cls(obj=obj)]
 
     @classmethod
-    def get_for_request(cls, request, identifier: Any) -> Optional[Self]:
+    def get_for_request(cls, request, identifier: str) -> Optional[Self]:
         if not identifier.isdigit():
             return None
         if not (request.user.is_superuser or cls.quest_type in request.user_permissions.quests):
@@ -61,7 +65,7 @@ class Quest:
 
     @classmethod
     def cached_get_all_for_request(cls, request) -> list["QuestSchema"]:
-        cache_key = f'quests:{cls.identifier}:{AccessPermission.cache_key_for_request(request)}'
+        cache_key = f'quests:{cls.quest_type}:{AccessPermission.cache_key_for_request(request)}'
         result = cache.get(cache_key, None)
         if result is not None:
             return result

src/c3nav/mapdata/quests/simple.py

@@ -1,12 +1,18 @@
 from dataclasses import dataclass
+from operator import attrgetter
+from typing import ClassVar
 
 from django.core.exceptions import ValidationError
+from django.db.models import F
 from django.utils.translation import gettext_lazy as _
 from shapely import Point
 from shapely.geometry import mapping
 
-from c3nav.mapdata.models.geometry.space import RangingBeacon
+from c3nav.mapdata.forms import I18nModelFormMixin
+from c3nav.mapdata.models import GraphEdge, Space
+from c3nav.mapdata.models.geometry.space import RangingBeacon, LeaveDescription
 from c3nav.mapdata.quests.base import register_quest, Quest, ChangeSetModelForm
+from c3nav.mapdata.utils.geometry import unwrap_geom
 
 
 class RangingBeaconAltitudeQuestForm(ChangeSetModelForm):
@@ -51,3 +57,96 @@ class RangingBeaconAltitudeQuest(Quest):
     def _qs_for_request(cls, request):
         return RangingBeacon.qs_for_request(request).select_related('space',
                                                                     'space__level').filter(altitude_quest=True)
+
+
+class LeaveDescriptionQuestForm(I18nModelFormMixin, ChangeSetModelForm):
+    class Meta:
+        model = LeaveDescription
+        fields = ("description", )
+
+    @property
+    def changeset_title(self):
+        return f'LeaveDesscription Quest: {self.instance.space.title} → {self.instance.target_space.title}'
+
+
+@register_quest
+@dataclass
+class LeaveDescriptionQuest(Quest):
+    quest_type = "leave_description"
+    quest_type_label = _('Leave Description')
+    form_class = LeaveDescriptionQuestForm
+    obj: ClassVar
+    space: Space
+    target_space: Space
+    the_point: Point
+
+    @property
+    def quest_description(self) -> list[str]:
+        return [
+            _("Please provide a description to be used when leaving “%(from_space)s” towards “%(to_space)s”.") % {
+                "from_space": self.space.title,
+                "to_space": self.target_space.title,
+            },
+            _("This will be used all doors that lead from this space to the other, not just the highlighted one! "
+              "So please be generic if there is more then one."),
+        ]
+
+    @property
+    def point(self) -> dict:
+        return mapping(self.the_point)
+
+    @property
+    def level_id(self) -> int:
+        if self.space.level_id == self.target_space.level_id:
+            return self.space.level_id
+        levels = sorted((self.space.level, self.target_space.level), key=attrgetter("base_altitude"))
+        if self.space.level.on_top_of_id is None and self.target_space.level.on_top_of_id is None:
+            return levels[1].pk
+        return levels[0].pk
+
+    @property
+    def identifier(self) -> str:
+        return f"{self.space.pk}-{self.target_space.pk}"
+
+    @classmethod
+    def get_all_for_request(cls, request, space_ids: tuple[int, int] = ()):
+        qs = Space.qs_for_request(request)
+        if space_ids:
+            qs = qs.filter(pk__in=space_ids)
+        spaces = {space.pk: space for space in qs.select_related("level")}
+        existing = set(tuple(item) for item in LeaveDescription.objects.values_list("space_id", "target_space_id"))
+        more_filter = {} if not space_ids else {"from_node__space_id": space_ids[0], "to_node__space_id": space_ids[1]}
+        edges = {
+            (from_space, to_space): (from_point, to_point)
+            for from_space, to_space, from_point, to_point in GraphEdge.objects.filter(
+                from_node__space__in=spaces,
+                to_node__space__in=spaces,
+                **more_filter,
+            ).exclude(
+                from_node__space=F("to_node__space")
+            ).values_list("from_node__space_id", "to_node__space_id", "from_node__geometry", "to_node__geometry")
+            if (from_space, to_space) not in existing
+        }
+        return [
+            cls(
+                space=spaces[from_space],
+                target_space=spaces[to_space],
+                the_point=unwrap_geom(from_point),
+            )
+            for (from_space, to_space), (from_point, to_point) in edges.items()
+        ]
+
+    @classmethod
+    def get_for_request(cls, request, identifier: str):
+        space_ids = identifier.split('-')
+        if len(space_ids) != 2 or not (space_ids[0].isdigit() and space_ids[1].isdigit()):
+            return None
+
+        results = cls.get_all_for_request(request, space_ids=tuple(int(i) for i in space_ids))
+        return results[0] if results else None
+
+    def get_form_kwargs(self, request):
+        instance = LeaveDescription()
+        instance.space = self.space
+        instance.target_space = self.target_space
+        return {"instance": instance}