AKModel/migrations/0068_aktype_slug.py

+# Generated by Django 5.1.6 on 2025-05-11 15:21
+
+from django.db import migrations, models
+
+
+def create_slugs(apps, schema_editor):
+    """
+    Automatically generate slugs from existing type names
+    """
+    AKType = apps.get_model("AKModel", "AKType")
+    for ak_type in AKType.objects.all():
+        slug = ak_type.name.lower().split(" ")[0]
+        ak_type.slug = slug[:30] if len(slug) > 30 else slug
+        ak_type.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('AKModel', '0067_eventparticipant_requirements_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='aktype',
+            name='slug',
+            field=models.SlugField(max_length=30, null=True, verbose_name='Slug'),
+        ),
+        migrations.RunPython(create_slugs, migrations.RunPython.noop),
+        migrations.AlterUniqueTogether(
+            name='aktype',
+            unique_together={('event', 'name')},
+        ),
+        migrations.AlterField(
+            model_name='aktype',
+            name='slug',
+            field=models.SlugField(max_length=30, verbose_name='Slug'),
+        ),
+        migrations.AlterUniqueTogether(
+            name='aktype',
+            unique_together={('event', 'name'), ('event', 'slug')},
+        ),
+    ]

AKModel/migrations/0068_event_export_delete_preferences_participants.py

+# Generated by Django 5.2.1 on 2025-06-17 15:57
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('AKModel', '0067_eventparticipant_requirements_and_more'),
+        ('AKPreference', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='eventparticipant',
+            name='event',
+        ),
+        migrations.RemoveField(
+            model_name='eventparticipant',
+            name='requirements',
+        ),
+        migrations.RemoveField(
+            model_name='availability',
+            name='participant',
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='poll_hidden',
+            field=models.BooleanField(default=True, help_text='Hides preference poll for non-staff users', verbose_name='Poll Hidden'),
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='poll_published_at',
+            field=models.DateTimeField(blank=True, help_text='Timestamp at which the preference poll was published', null=True, verbose_name='Poll published at'),
+        ),
+        migrations.DeleteModel(
+            name='AKPreference',
+        ),
+        migrations.DeleteModel(
+            name='EventParticipant',
+        ),
+        migrations.AddField(
+            model_name='availability',
+            name='participant',
+            field=models.ForeignKey(blank=True, help_text='Participant whose availability this is', null=True,
+                                    on_delete=django.db.models.deletion.CASCADE, related_name='availabilities',
+                                    to='AKPreference.eventparticipant', verbose_name='Participant'),
+        ),
+    ]

AKModel/migrations/0069_merge_20250617_1844.py

+# Generated by Django 5.2.1 on 2025-06-17 18:44
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('AKModel', '0068_aktype_slug'),
+        ('AKModel', '0068_event_export_delete_preferences_participants'),
+    ]
+
+    operations = [
+    ]

AKModel/migrations/0070_requirements_relevant_for_participants.py

+# Generated by Django 5.2.3 on 2025-06-18 10:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('AKModel', '0069_merge_20250617_1844'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='akrequirement',
+            name='relevant_for_participants',
+            field=models.BooleanField(default=False, help_text='Show this requirement when collecting participant preferences', verbose_name='Relevant for Participants?'),
+        ),
+    ]

AKModel/models.py

 import itertools
-from datetime import timedelta
+import json
+import math
+from dataclasses import dataclass
+from datetime import datetime, timedelta
+from typing import Any, Generator, Iterable
 
-from django.db import models
 from django.apps import apps
+from django.conf import settings
+from django.core.validators import RegexValidator
+from django.db import models, transaction
 from django.db.models import Count
 from django.urls import reverse_lazy
 from django.utils import timezone
-from django.utils.datetime_safe import datetime
 from django.utils.text import slugify
 from django.utils.translation import gettext_lazy as _
 from simple_history.models import HistoricalRecords
 from timezone_field import TimeZoneField
 
+# Custom validators to be used for some of the fields
+# Prevent inclusion of the quotation marks ' " ´ `
+# This may be necessary to prevent javascript issues
+no_quotation_marks_validator = RegexValidator(regex=r"['\"´`]+", inverse_match=True,
+                                              message=_('May not contain quotation marks'))
+# Enforce that the field contains of at least one letter or digit (and not just special characters
+# This prevents issues when autogenerating slugs from that field
+slugable_validator = RegexValidator(regex=r"[\w\s]+", message=_('Must contain at least one letter or digit'))
+
+
+@dataclass
+class OptimizerTimeslot:
+    """Class describing a discrete timeslot. Used to interface with an optimizer."""
+
+    avail: "Availability"
+    """The availability object corresponding to this timeslot."""
+
+    idx: int
+    """The unique index of this optimizer timeslot."""
+
+    constraints: set[str]
+    """The set of time constraints fulfilled by this object."""
+
+    def merge(self, other: "OptimizerTimeslot") -> "OptimizerTimeslot":
+        """Merge with other OptimizerTimeslot.
+
+        Creates a new OptimizerTimeslot object.
+        Its availability is constructed by merging the availabilities of self and other,
+        its constraints by taking the union of both constraint sets.
+        As an index, the index of self is used.
+        """
+        avail = self.avail.merge_with(other.avail)
+        constraints = self.constraints.union(other.constraints)
+        return OptimizerTimeslot(
+            avail=avail, idx=self.idx, constraints=constraints
+        )
+
+    def __repr__(self) -> str:
+        return f"({self.avail.simplified}, {self.idx}, {self.constraints})"
+
+TimeslotBlock = list[OptimizerTimeslot]
+
+
+def merge_blocks(
+    blocks: Iterable[TimeslotBlock]
+) -> Iterable[TimeslotBlock]:
+    """Merge iterable of blocks together.
+
+    The timeslots of all blocks are grouped into maximal blocks.
+    Timeslots with the same start and end are identified with each other
+    and merged (cf `OptimizerTimeslot.merge`).
+    Throws a ValueError if any timeslots are overlapping but do not
+    share the same start and end, i.e. partial overlap is not allowed.
+
+    :param blocks: iterable of blocks to merge.
+    :return: iterable of merged blocks.
+    :rtype: iterable over lists of OptimizerTimeslot objects
+    """
+    if not blocks:
+        return []
+
+    # flatten timeslot iterables to single chain
+    timeslot_chain = itertools.chain.from_iterable(blocks)
+
+    # sort timeslots according to start
+    timeslots = sorted(
+        timeslot_chain,
+        key=lambda slot: slot.avail.start
+    )
+
+    if not timeslots:
+        return []
+
+    all_blocks = []
+    current_block = [timeslots[0]]
+    timeslots = timeslots[1:]
+
+    for slot in timeslots:
+        if current_block and slot.avail.overlaps(current_block[-1].avail, strict=True):
+            if (
+                slot.avail.start == current_block[-1].avail.start
+                and slot.avail.end == current_block[-1].avail.end
+            ):
+                # the same timeslot -> merge
+                current_block[-1] = current_block[-1].merge(slot)
+            else:
+                # partial overlap of interiors -> not supported
+                raise ValueError(
+                    "Partially overlapping timeslots are not supported!"
+                    f" ({current_block[-1].avail.simplified}, {slot.avail.simplified})"
+                )
+        elif not current_block or slot.avail.overlaps(current_block[-1].avail, strict=False):
+            # only endpoints in intersection -> same block
+            current_block.append(slot)
+        else:
+            # no overlap at all -> new block
+            all_blocks.append(current_block)
+            current_block = [slot]
+
+    if current_block:
+        all_blocks.append(current_block)
+
+    return all_blocks
+
 
 class Event(models.Model):
     """
@@ -32,8 +141,9 @@ class Event(models.Model):
                                          help_text=_('When should AKs with intention to submit a resolution be done?'))
 
     interest_start = models.DateTimeField(verbose_name=_('Interest Window Start'), blank=True, null=True,
-              help_text=
-              _('Opening time for expression of interest. When left blank, no interest indication will be possible.'))
+                                          help_text=
+                                          _('Opening time for expression of interest. When left blank, no interest '
+                                            'indication will be possible.'))
 
     interest_end = models.DateTimeField(verbose_name=_('Interest Window End'), blank=True, null=True,
                                         help_text=_('Closing time for expression of interest.'))
@@ -45,16 +155,28 @@ class Event(models.Model):
     plan_hidden = models.BooleanField(verbose_name=_('Plan Hidden'), help_text=_('Hides plan for non-staff users'),
                                       default=True)
     plan_published_at = models.DateTimeField(verbose_name=_('Plan published at'), blank=True, null=True,
-                                         help_text=_('Timestamp at which the plan was published'))
+                                             help_text=_('Timestamp at which the plan was published'))
+
+    poll_hidden = models.BooleanField(verbose_name=_('Poll Hidden'),
+                                      help_text=_('Hides preference poll for non-staff users'),
+                                      default=True)
+    poll_published_at = models.DateTimeField(verbose_name=_('Poll published at'), blank=True, null=True,
+                                             help_text=_('Timestamp at which the preference poll was published'))
 
     base_url = models.URLField(verbose_name=_("Base URL"), help_text=_("Prefix for wiki link construction"), blank=True)
     wiki_export_template_name = models.CharField(verbose_name=_("Wiki Export Template Name"), blank=True, max_length=50)
     default_slot = models.DecimalField(max_digits=4, decimal_places=2, default=2, verbose_name=_('Default Slot Length'),
                                        help_text=_('Default length in hours that is assumed for AKs in this event.'))
+    export_slot = models.DecimalField(max_digits=4, decimal_places=2, default=1, verbose_name=_('Export Slot Length'),
+                                        help_text=_(
+                                            'Slot duration in hours that is used in the timeslot discretization, '
+                                            'when this event is exported for the solver.'
+                                        ))
+
 
     contact_email = models.EmailField(verbose_name=_("Contact email address"), blank=True,
-                                        help_text=_("An email address that is displayed on every page "
-                                                    "and can be used for all kinds of questions"))
+                                      help_text=_("An email address that is displayed on every page "
+                                                  "and can be used for all kinds of questions"))
 
     class Meta:
         verbose_name = _('Event')
@@ -85,11 +207,12 @@ class Event(models.Model):
         event = Event.objects.filter(active=True).order_by('start').first()
         # No active event? Return the next event taking place
         if event is None:
-            event = Event.objects.order_by('start').filter(start__gt=datetime.now()).first()
+            event = Event.objects.order_by('start').filter(start__gt=datetime.now().astimezone()).first()
         return event
 
     def get_categories_with_aks(self, wishes_seperately=False,
-                                filter_func=lambda ak: True, hide_empty_categories=False):
+                                filter_func=lambda ak: True, hide_empty_categories=False,
+                                types=None, types_all_selected_only=False):
         """
         Get AKCategories as well as a list of AKs belonging to the category for this event
 
@@ -97,6 +220,12 @@ class Event(models.Model):
         :type wishes_seperately: bool
         :param filter_func: Optional filter predicate, only include AK in list if filter returns True
         :type filter_func: (AK)->bool
+        :param hide_empty_categories: If True, categories with no AKs will not be included in the result
+        :type hide_empty_categories: bool
+        :param types: Optional list of AK types to filter by, if None, all types are included
+        :type types: list[AKType] | None
+        :param types_all_selected_only: If True, only include AKs that have all of the selected types at the same time
+        :type types_all_selected_only: bool
         :return: list of category-AK-list-tuples, optionally the additional list of AK wishes
         :rtype: list[(AKCategory, list[AK])] [, list[AK]]
         """
@@ -108,7 +237,7 @@ class Event(models.Model):
         # A different behavior is needed depending on whether wishes should show up inside their categories
         # or as a separate category
 
-        def _get_category_aks(category):
+        def _get_category_aks(category, types):
             """
             Get all AKs belonging to a category
             Use joining and prefetching to reduce the number of necessary SQL queries
@@ -117,12 +246,18 @@ class Event(models.Model):
             :return: QuerySet over AKs
             :return: QuerySet[AK]
             """
-            return category.ak_set.select_related('event').prefetch_related('owners', 'akslot_set').all()
+            s = category.ak_set
+            if types is not None:
+                s = s.filter(types__in=types).distinct()
+                if types_all_selected_only:
+                    # TODO fix - this only works in very specific cases
+                    s = s.annotate(Count('types')).filter(types__count=len(types))
+            return s.select_related('event').prefetch_related('owners', 'akslot_set', 'types').all()
 
         if wishes_seperately:
             for category in categories:
                 ak_list = []
-                for ak in _get_category_aks(category):
+                for ak in _get_category_aks(category, types):
                     if filter_func(ak):
                         if ak.wish:
                             ak_wishes.append(ak)
@@ -134,7 +269,7 @@ class Event(models.Model):
 
         for category in categories:
             ak_list = []
-            for ak in _get_category_aks(category):
+            for ak in _get_category_aks(category, types):
                 if filter_func(ak):
                     ak_list.append(ak)
             if not hide_empty_categories or len(ak_list) > 0:
@@ -162,11 +297,271 @@ class Event(models.Model):
                 .filter(availabilities__count=0, owners__count__gt=0)
                 )
 
+    def _generate_slots_from_block(
+        self,
+        start: datetime,
+        end: datetime,
+        slot_duration: timedelta,
+        *,
+        slot_index: int = 0,
+        constraints: set[str] | None = None,
+    ) -> Generator[TimeslotBlock, None, int]:
+        """Discretize a time range into timeslots.
+
+        Uses a uniform discretization into discrete slots of length `slot_duration`,
+        starting at `start`. No incomplete timeslots are generated, i.e.
+        if (`end` - `start`) is not a whole number multiple of `slot_duration`
+        then the last incomplete timeslot is dropped.
+
+        :param start: Start of the time range.
+        :param end: Start of the time range.
+        :param slot_duration: Duration of a single timeslot in the discretization.
+        :param slot_index: index of the first timeslot. Defaults to 0.
+
+        :yield: Block of optimizer timeslots as the discretization result.
+        :ytype: list of OptimizerTimeslot
+
+        :return: The first slot index after the yielded blocks, i.e.
+            `slot_index` + total # generated timeslots
+        :rtype: int
+        """
+        # local import to prevent cyclic import
+        # pylint: disable=import-outside-toplevel
+        from AKModel.availability.models import Availability
+
+        current_slot_start = start
+        previous_slot_start: datetime | None = None
+
+        if constraints is None:
+            constraints = set()
+
+        current_block = []
+
+        room_availabilities = list({
+            availability
+            for room in Room.objects.filter(event=self)
+            for availability in room.availabilities.all()
+        })
+
+        while current_slot_start + slot_duration <= end:
+            slot = Availability(
+                event=self,
+                start=current_slot_start,
+                end=current_slot_start + slot_duration,
+            )
+
+            if any((availability.contains(slot) for availability in room_availabilities)):
+                # no gap in a block
+                if (
+                    previous_slot_start is not None
+                    and previous_slot_start + slot_duration < current_slot_start
+                ):
+                    yield current_block
+                    current_block = []
+
+                current_block.append(
+                    OptimizerTimeslot(avail=slot, idx=slot_index, constraints=constraints)
+                )
+                previous_slot_start = current_slot_start
+
+            slot_index += 1
+            current_slot_start += slot_duration
+
+        if current_block:
+            yield current_block
+
+        return slot_index
+
+    def uniform_time_slots(self, *, slots_in_an_hour: float) -> Iterable[TimeslotBlock]:
+        """Uniformly discretize the entire event into blocks of timeslots.
+
+        Discretizes entire event uniformly. May not necessarily result in a single block
+        as slots with no room availability are dropped.
+
+        :param slots_in_an_hour: The percentage of an hour covered by a single slot.
+            Determines the discretization granularity.
+        :yield: Block of optimizer timeslots as the discretization result.
+        :ytype: list of OptimizerTimeslot
+        """
+        all_category_constraints = AKCategory.create_category_optimizer_constraints(
+            AKCategory.objects.filter(event=self).all()
+        )
+
+        yield from self._generate_slots_from_block(
+            start=self.start,
+            end=self.end,
+            slot_duration=timedelta(hours=1.0 / slots_in_an_hour),
+            constraints=all_category_constraints,
+        )
+
+    def default_time_slots(self, *, slots_in_an_hour: float) -> Iterable[TimeslotBlock]:
+        """Discretize all default slots into blocks of timeslots.
+
+        In the discretization each default slot corresponds to one block.
+
+        :param slots_in_an_hour: The percentage of an hour covered by a single slot.
+            Determines the discretization granularity.
+        :yield: Block of optimizer timeslots as the discretization result.
+        :ytype: list of TimeslotBlock
+        """
+        slot_duration = timedelta(hours=1.0 / slots_in_an_hour)
+        slot_index = 0
+
+        for block_slot in DefaultSlot.objects.filter(event=self).order_by("start", "end"):
+            category_constraints = AKCategory.create_category_optimizer_constraints(
+                block_slot.primary_categories.all()
+            )
+
+            slot_index = yield from self._generate_slots_from_block(
+                start=block_slot.start,
+                end=block_slot.end,
+                slot_duration=slot_duration,
+                slot_index=slot_index,
+                constraints=category_constraints,
+            )
+
+    def discretize_timeslots(self, *, slots_in_an_hour: float | None = None) -> Iterable[TimeslotBlock]:
+        """"Choose discretization scheme.
+
+        Uses default_time_slots if the event has any DefaultSlot, otherwise uniform_time_slots.
+
+        :param slots_in_an_hour: The percentage of an hour covered by a single slot.
+            Determines the discretization granularity.
+        :yield: Block of optimizer timeslots as the discretization result.
+        :ytype: list of TimeslotBlock
+        """
+
+        if slots_in_an_hour is None:
+            slots_in_an_hour = 1.0 / float(self.export_slot)
+
+        if DefaultSlot.objects.filter(event=self).exists():
+            # discretize default slots if they exists
+            yield from merge_blocks(self.default_time_slots(slots_in_an_hour=slots_in_an_hour))
+        else:
+            yield from self.uniform_time_slots(slots_in_an_hour=slots_in_an_hour)
+
+    @transaction.atomic
+    def schedule_from_json(
+        self, schedule: str | dict[str, Any], *, check_for_data_inconsistency: bool = True
+    ) -> int:
+        """Load AK schedule from a json string.
+
+        :param schedule: A string that can be decoded to json, describing
+            the AK schedule. The json data is assumed to be constructed
+            following the output specification of the KoMa conference optimizer, cf.
+            https://github.com/Die-KoMa/ak-plan-optimierung/wiki/Input-&-output-format
+        """
+        if isinstance(schedule, str):
+            schedule = json.loads(schedule)
+
+        if "input" not in schedule or "scheduled_aks" not in schedule:
+            raise ValueError(_("Cannot parse malformed JSON input."))
+
+        if apps.is_installed("AKSolverInterface") and check_for_data_inconsistency:
+            from AKSolverInterface.serializers import ExportEventSerializer   # pylint: disable=import-outside-toplevel
+            export_dict = ExportEventSerializer(self).data
+
+            if schedule["input"] != export_dict:
+                raise ValueError(_("Data has changed since the export. Reexport and run the solver again."))
+
+        slots_in_an_hour = schedule["input"]["timeslots"]["info"]["duration"]
+
+        timeslot_dict = {
+            timeslot.idx: timeslot
+            for block in self.discretize_timeslots(slots_in_an_hour=slots_in_an_hour)
+            for timeslot in block
+        }
+
+        slots_updated = 0
+        for scheduled_slot in schedule["scheduled_aks"]:
+            scheduled_slot["timeslot_ids"] = list(map(int, scheduled_slot["timeslot_ids"]))
+            slot = AKSlot.objects.get(id=int(scheduled_slot["ak_id"]))
+
+            if not scheduled_slot["timeslot_ids"]:
+                raise ValueError(
+                    _("AK {ak_name} is not assigned any timeslot by the solver").format(ak_name=slot.ak.name)
+                )
+
+            start_timeslot = timeslot_dict[min(scheduled_slot["timeslot_ids"])].avail
+            end_timeslot = timeslot_dict[max(scheduled_slot["timeslot_ids"])].avail
+            solver_duration = (end_timeslot.end - start_timeslot.start).total_seconds() / 3600.0
+
+            if solver_duration + 2e-4 < slot.duration:
+                raise ValueError(
+                    _(
+                        "Duration of AK {ak_name} assigned by solver ({solver_duration} hours) "
+                        "is less than the duration required by the slot ({slot_duration} hours)"
+                    ).format(
+                        ak_name=slot.ak.name,
+                        solver_duration=solver_duration,
+                        slot_duration=slot.duration,
+                    )
+                )
+
+            if slot.fixed:
+                solver_room = Room.objects.get(id=int(scheduled_slot["room_id"]))
+                if slot.room != solver_room:
+                    raise ValueError(
+                        _(
+                            "Fixed AK {ak_name} assigned by solver to room {solver_room} "
+                            "is fixed to room {slot_room}"
+                        ).format(
+                            ak_name=slot.ak.name,
+                            solver_room=solver_room.name,
+                            slot_room=slot.room.name,
+                        )
+                    )
+                if slot.start != start_timeslot.start:
+                    raise ValueError(
+                        _(
+                            "Fixed AK {ak_name} assigned by solver to start at {solver_start} "
+                            "is fixed to start at {slot_start}"
+                        ).format(
+                            ak_name=slot.ak.name,
+                            solver_start=start_timeslot.start,
+                            slot_start=slot.start,
+                        )
+                    )
+            else:
+                slot.room = Room.objects.get(id=int(scheduled_slot["room_id"]))
+                slot.start = start_timeslot.start
+                slot.save()
+                slots_updated += 1
+
+        return slots_updated
+
+    @property
+    def rooms(self):
+        """Ordered queryset of all rooms associated to this event."""
+        return Room.objects.filter(event=self).order_by()
+
+    @property
+    def slots(self):
+        """Ordered queryset of all AKSlots associated to this event."""
+        return AKSlot.objects.filter(event=self).order_by()
+
+    @property
+    def participants(self):
+        """Ordered queryset of all participants associated to this event."""
+        if apps.is_installed("AKPreference"):
+            # local import to prevent cyclic import
+            # pylint: disable=import-outside-toplevel
+            from AKPreference.models import EventParticipant
+            return EventParticipant.objects.filter(event=self).order_by()
+        return []
+
+    @property
+    def owners(self):
+        """Ordered queryset of all AK owners associated to this event."""
+        return AKOwner.objects.filter(event=self).order_by()
+
 
 class AKOwner(models.Model):
     """ An AKOwner describes the person organizing/holding an AK.
     """
-    name = models.CharField(max_length=64, verbose_name=_('Nickname'), help_text=_('Name to identify an AK owner by'))
+    name = models.CharField(max_length=64, verbose_name=_('Nickname'),
+                            validators=[no_quotation_marks_validator, slugable_validator],
+                            help_text=_('Name to identify an AK owner by'))
     slug = models.SlugField(max_length=64, blank=True, verbose_name=_('Slug'), help_text=_('Slug for URL generation'))
     institution = models.CharField(max_length=128, blank=True, verbose_name=_('Institution'), help_text=_('Uni etc.'))
     link = models.URLField(blank=True, verbose_name=_('Web Link'), help_text=_('Link to Homepage'))
@@ -245,8 +640,8 @@ class AKCategory(models.Model):
     description = models.TextField(blank=True, verbose_name=_("Description"),
                                    help_text=_("Short description of this AK Category"))
     present_by_default = models.BooleanField(blank=True, default=True, verbose_name=_("Present by default"),
-                                             help_text=_("Present AKs of this category by default "
-                                                 "if AK owner did not specify whether this AK should be presented?"))
+                                             help_text=_("Present AKs of this category by default if AK owner did not "
+                                                         "specify whether this AK should be presented?"))
 
     event = models.ForeignKey(to=Event, on_delete=models.CASCADE, verbose_name=_('Event'),
                               help_text=_('Associated event'))
@@ -260,6 +655,20 @@ class AKCategory(models.Model):
     def __str__(self):
         return self.name
 
+    @staticmethod
+    def create_category_optimizer_constraints(categories: Iterable["AKCategory"]) -> set[str]:
+        """Create a set of constraint strings from an AKCategory iterable.
+
+        :param categories: The iterable of categories to derive the constraint strings from.
+        :return: A set of category constraint strings, i.e. strings of the form
+            'availability-cat-<cat.name>'.
+        :rtype: set of strings.
+        """
+        return {
+            f"availability-cat-{cat.name}"
+            for cat in categories
+        }
+
 
 class AKTrack(models.Model):
     """ An AKTrack describes a set of semantically related AKs.
@@ -292,6 +701,8 @@ class AKRequirement(models.Model):
     """ An AKRequirement describes something needed to hold an AK, e.g. infrastructure.
     """
     name = models.CharField(max_length=128, verbose_name=_('Name'), help_text=_('Name of the Requirement'))
+    relevant_for_participants = models.BooleanField(default=False, verbose_name=_('Relevant for Participants?'),
+                                    help_text=_('Show this requirement when collecting participant preferences'))
 
     event = models.ForeignKey(to=Event, on_delete=models.CASCADE, verbose_name=_('Event'),
                               help_text=_('Associated event'))
@@ -311,7 +722,7 @@ class AKType(models.Model):
     or to which group of people it is addressed. Types are specified per event and are an optional feature.
     """
     name = models.CharField(max_length=128, verbose_name=_('Name'), help_text=_('Name describing the type'))
-
+    slug = models.SlugField(max_length=30, blank=False, verbose_name=_('Slug'),)
     event = models.ForeignKey(to=Event, on_delete=models.CASCADE, verbose_name=_('Event'),
                               help_text=_('Associated event'))
 
@@ -319,7 +730,7 @@ class AKType(models.Model):
         verbose_name = _('AK Type')
         verbose_name_plural = _('AK Types')
         ordering = ['name']
-        unique_together = ['event', 'name']
+        unique_together = [['event', 'name'], ['event', 'slug']]
 
     def __str__(self):
         return self.name
@@ -328,8 +739,10 @@ class AKType(models.Model):
 class AK(models.Model):
     """ An AK is a slot-based activity to be scheduled during an event.
     """
-    name = models.CharField(max_length=256, verbose_name=_('Name'), help_text=_('Name of the AK'))
+    name = models.CharField(max_length=256, verbose_name=_('Name'), help_text=_('Name of the AK'),
+                            validators=[no_quotation_marks_validator, slugable_validator])
     short_name = models.CharField(max_length=64, blank=True, verbose_name=_('Short Name'),
+                                  validators=[no_quotation_marks_validator],
                                   help_text=_('Name displayed in the schedule'))
     description = models.TextField(blank=True, verbose_name=_('Description'), help_text=_('Description of the AK'))
 
@@ -343,7 +756,7 @@ class AK(models.Model):
     category = models.ForeignKey(to=AKCategory, on_delete=models.PROTECT, verbose_name=_('Category'),
                                  help_text=_('Category of the AK'))
     types = models.ManyToManyField(to=AKType, blank=True, verbose_name=_('Types'),
-                                          help_text=_("This AK is"))
+                                   help_text=_("This AK is"))
     track = models.ForeignKey(to=AKTrack, blank=True, on_delete=models.SET_NULL, null=True, verbose_name=_('Track'),
                               help_text=_('Track the AK belongs to'))
 
@@ -361,8 +774,8 @@ class AK(models.Model):
                                            help_text=_('AKs that should precede this AK in the schedule'))
 
     notes = models.TextField(blank=True, verbose_name=_('Organizational Notes'), help_text=_(
-        'Notes to organizers. These are public. For private notes, please use the button for private messages '
-        'on the detail page of this AK (after creation/editing).'))
+            'Notes to organizers. These are public. For private notes, please use the button for private messages '
+            'on the detail page of this AK (after creation/editing).'))
 
     interest = models.IntegerField(default=-1, verbose_name=_('Interest'), help_text=_('Expected number of people'))
     interest_counter = models.IntegerField(default=0, verbose_name=_('Interest Counter'),
@@ -374,7 +787,7 @@ class AK(models.Model):
     include_in_export = models.BooleanField(default=True, verbose_name=_('Export?'),
                                             help_text=_("Include AK in wiki export?"))
 
-    history = HistoricalRecords(excluded_fields=['interest_counter', 'include_in_export'])
+    history = HistoricalRecords(excluded_fields=['interest', 'interest_counter', 'include_in_export'])
 
     class Meta:
         verbose_name = _('AK')
@@ -400,7 +813,7 @@ class AK(models.Model):
         availabilities = ', \n'.join(f'{a.simplified}' for a in Availability.objects.select_related('event')
                                      .filter(ak=self))
         detail_string = f"""{self.name}{" (R)" if self.reso else ""}:
-        
+
         {self.owners_list}
 
         {_('Interest')}: {self.interest}"""
@@ -408,8 +821,22 @@ class AK(models.Model):
             detail_string += f"\n{_('Requirements')}: {', '.join(str(r) for r in self.requirements.all())}"
         if self.types.count() > 0:
             detail_string += f"\n{_('Types')}: {', '.join(str(r) for r in self.types.all())}"
+
+        # Find conflicts
+        # (both directions, those specified for this AK and those were this AK was specified as conflict)
+        # Deduplicate and order list alphabetically
+        conflicts = set()
         if self.conflicts.count() > 0:
-            detail_string += f"\n{_('Conflicts')}: {', '.join(str(c) for c in self.conflicts.all())}"
+            for c in self.conflicts.all():
+                conflicts.add(str(c))
+        if self.conflict.count() > 0:
+            for c in self.conflict.all():
+                conflicts.add(str(c))
+        if len(conflicts) > 0:
+            conflicts = list(conflicts)
+            conflicts.sort()
+            detail_string += f"\n{_('Conflicts')}: {', '.join(conflicts)}"
+
         if self.prerequisites.count() > 0:
             detail_string += f"\n{_('Prerequisites')}: {', '.join(str(p) for p in self.prerequisites.all())}"
         detail_string += f"\n{_('Availabilities')}: \n{availabilities}"
@@ -418,23 +845,33 @@ class AK(models.Model):
     @property
     def owners_list(self):
         """
-        Get a list of stringified representations of all owners
+        Get a stringified list of stringified representations of all owners
 
-        :return: list of owners
-        :rtype: List[str]
+        :return: stringified list of owners
+        :rtype: str
         """
         return ", ".join(str(owner) for owner in self.owners.all())
 
     @property
     def durations_list(self):
         """
-        Get a list of stringified representations of all durations of associated slots
+        Get a stringified list of stringified representations of all durations of associated slots
 
-        :return: list of durations
-        :rtype: List[str]
+        :return: stringified list of durations
+        :rtype: str
         """
         return ", ".join(str(slot.duration_simplified) for slot in self.akslot_set.select_related('event').all())
 
+    @property
+    def types_list(self):
+        """
+        Get a stringified list of all types of this AK
+
+        :return: stringified list of types
+        :rtype: str
+        """
+        return ", ".join(str(t) for t in self.types.all())
+
     @property
     def wish(self):
         """
@@ -489,7 +926,7 @@ class AK(models.Model):
             return reverse_lazy('submit:ak_detail', kwargs={'event_slug': self.event.slug, 'pk': self.id})
         return self.edit_url
 
-    def save(self, force_insert=False, force_update=False, using=None, update_fields=None):
+    def save(self, *args, force_insert=False, force_update=False, using=None, update_fields=None):
         # Auto-Generate Link if not set yet
         if self.link == "":
             link = self.event.base_url + self.name.replace(" ", "_")
@@ -498,7 +935,8 @@ class AK(models.Model):
             # Tell Django that we have updated the link field
             if update_fields is not None:
                 update_fields = {"link"}.union(update_fields)
-        super().save(force_insert, force_update, using, update_fields)
+        super().save(*args,
+                     force_insert=force_insert, force_update=force_update, using=using, update_fields=update_fields)
 
 
 class Room(models.Model):
@@ -536,6 +974,32 @@ class Room(models.Model):
     def __str__(self):
         return self.title
 
+    def get_time_constraints(self) -> list[str]:
+        """Construct list of required time constraint labels."""
+        # local import to prevent cyclic import
+        # pylint: disable=import-outside-toplevel
+        from AKModel.availability.models import Availability
+
+        # check if room is available for the whole event
+        # -> no time constraint needs to be introduced
+        if Availability.is_event_covered(self.event, self.availabilities.all()):
+            time_constraints = []
+        else:
+            time_constraints = [f"availability-room-{self.pk}"]
+
+        return time_constraints
+
+    def get_fulfilled_room_constraints(self) -> list[str]:
+        """Construct list of fulfilled room constraint labels."""
+        fulfilled_room_constraints = list(self.properties.values_list("name", flat=True))
+        fulfilled_room_constraints.append(f"fixed-room-{self.pk}")
+
+        if not any(constr.startswith("proxy") for constr in fulfilled_room_constraints):
+            fulfilled_room_constraints.append("no-proxy")
+
+        fulfilled_room_constraints.sort()
+        return fulfilled_room_constraints
+
 
 class AKSlot(models.Model):
     """ An AK Mapping matches an AK to a room during a certain time.
@@ -615,7 +1079,7 @@ class AKSlot(models.Model):
 
     def overlaps(self, other: "AKSlot"):
         """
-        Check wether two slots overlap
+        Check whether two slots overlap
 
         :param other: second slot to compare with
         :return: true if they overlap, false if not:
@@ -623,13 +1087,88 @@ class AKSlot(models.Model):
         """
         return self.start < other.end <= self.end or self.start <= other.start < self.end
 
-    def save(self, force_insert=False, force_update=False, using=None, update_fields=None):
+    def save(self, *args, force_insert=False, force_update=False, using=None, update_fields=None):
         # Make sure duration is not longer than the event
         if update_fields is None or 'duration' in update_fields:
             event_duration = self.event.end - self.event.start
             event_duration_hours = event_duration.days * 24 + event_duration.seconds // 3600
             self.duration = min(self.duration, event_duration_hours)
-        super().save(force_insert, force_update, using, update_fields)
+        super().save(*args,
+                     force_insert=force_insert, force_update=force_update, using=using, update_fields=update_fields)
+
+    def get_room_constraints(self, export_scheduled_aks_as_fixed: bool = False) -> list[str]:
+        """Construct list of required room constraint labels."""
+        room_constraints = list(self.ak.requirements.values_list("name", flat=True).order_by())
+        if (export_scheduled_aks_as_fixed or self.fixed) and self.room is not None:
+            room_constraints.append(f"fixed-room-{self.room.pk}")
+
+        if not any(constr.startswith("proxy") for constr in room_constraints):
+            room_constraints.append("no-proxy")
+
+        room_constraints.sort()
+        return room_constraints
+
+    def get_time_constraints(self, export_scheduled_aks_as_fixed: bool = False) -> list[str]:
+        """Construct list of required time constraint labels."""
+        # local import to prevent cyclic import
+        # pylint: disable=import-outside-toplevel
+        from AKModel.availability.models import Availability
+
+        def _owner_time_constraints(owner: AKOwner):
+            owner_avails = owner.availabilities.all()
+            if not owner_avails or Availability.is_event_covered(self.event, owner_avails):
+                return []
+            return [f"availability-person-{owner.pk}"]
+
+        # check if ak resp. owner is available for the whole event
+        # -> no time constraint needs to be introduced
+        if (export_scheduled_aks_as_fixed or self.fixed) and self.start is not None:
+            time_constraints = [f"fixed-akslot-{self.id}"]
+        elif not Availability.is_event_covered(self.event, self.ak.availabilities.all()):
+            time_constraints = [f"availability-ak-{self.ak.pk}"]
+        else:
+            time_constraints = []
+
+        if self.ak.reso:
+            time_constraints.append("resolution")
+        for owner in self.ak.owners.all():
+            time_constraints.extend(_owner_time_constraints(owner))
+
+        if self.ak.category:
+            category_constraints = AKCategory.create_category_optimizer_constraints([self.ak.category])
+            time_constraints.extend(category_constraints)
+
+        time_constraints.sort()
+        return time_constraints
+
+    @property
+    def export_duration(self) -> int:
+        """Number of discrete export timeslots covered by this AKSlot."""
+        export_duration = self.duration / self.event.export_slot
+        # We need to return an int, so we round up.
+        # If the exact result for `export_duration` is an integer `k`,
+        # FLOP inaccuracies could yield `k + eps`. Then, rounding up
+        # would return `k + 1` instead of `k`. To avoid this, we subtract
+        # a small epsilon before rounding.
+        return math.ceil(export_duration - settings.EXPORT_CEIL_OFFSET_EPS)
+
+    @property
+    def type_names(self):
+        """Ordered queryset of the names of all types of this slot's AK."""
+        return self.ak.types.values_list("name", flat=True).order_by()
+
+    @property
+    def conflict_pks(self) -> list[int]:
+        """Ordered queryset of the PKs of all AKSlots that in conflict to this slot."""
+        conflict_slots = AKSlot.objects.filter(ak__in=self.ak.conflicts.all())
+        other_ak_slots = AKSlot.objects.filter(ak=self.ak).exclude(pk=self.pk)
+        return list((conflict_slots | other_ak_slots).values_list("pk", flat=True).order_by())
+
+    @property
+    def depencency_pks(self) -> list[int]:
+        """Ordered queryset of the PKs of all AKSlots that this slot depends on."""
+        dependency_slots = AKSlot.objects.filter(ak__in=self.ak.prerequisites.all())
+        return list(dependency_slots.values_list("pk", flat=True).order_by())
 
 
 class AKOrgaMessage(models.Model):
@@ -664,6 +1203,7 @@ class ConstraintViolation(models.Model):
     Depending on the type, different fields (references to other models) will be filled. Each violation should always
     be related to an event and at least on other instance of a causing entity
     """
+
     class Meta:
         verbose_name = _('Constraint Violation')
         verbose_name_plural = _('Constraint Violations')
@@ -680,7 +1220,7 @@ class ConstraintViolation(models.Model):
         AK_CONFLICT_COLLISION = 'acc', _('AK Slot is scheduled at the same time as an AK listed as a conflict')
         AK_BEFORE_PREREQUISITE = 'abp', _('AK Slot is scheduled before an AK listed as a prerequisite')
         AK_AFTER_RESODEADLINE = 'aar', _(
-            'AK Slot for AK with intention to submit a resolution is scheduled after resolution deadline')
+                'AK Slot for AK with intention to submit a resolution is scheduled after resolution deadline')
         AK_CATEGORY_MISMATCH = 'acm', _('AK Slot in a category is outside that categories availabilities')
         AK_SLOT_COLLISION = 'asc', _('Two AK Slots for the same AK scheduled at the same time')
         ROOM_CAPACITY_EXCEEDED = 'rce', _('Room does not have enough space for interest in scheduled AK Slot')
@@ -881,6 +1421,7 @@ class DefaultSlot(models.Model):
     Model representing a default slot,
     i.e., a prefered slot to use for typical AKs in the schedule to guarantee enough breaks etc.
     """
+
     class Meta:
         verbose_name = _('Default Slot')
         verbose_name_plural = _('Default Slots')
@@ -893,7 +1434,8 @@ class DefaultSlot(models.Model):
                               help_text=_('Associated event'))
 
     primary_categories = models.ManyToManyField(to=AKCategory, verbose_name=_('Primary categories'), blank=True,
-                                            help_text=_('Categories that should be assigned to this slot primarily'))
+                                                help_text=_(
+                                                        'Categories that should be assigned to this slot primarily'))
 
     @property
     def start_simplified(self) -> str:

AKModel/serializers.py

 from rest_framework import serializers
 
-from AKModel.models import AK, Room, AKSlot, AKTrack, AKCategory, AKOwner
+from AKModel.models import AK, AKCategory, AKOwner, AKSlot, AKTrack, Room
+
+
+class StringListField(serializers.ListField):
+    """List field containing strings."""
+
+    child = serializers.CharField()
+
+
+class IntListField(serializers.ListField):
+    """List field containing integers."""
+
+    child = serializers.IntegerField()
 
 
 class AKOwnerSerializer(serializers.ModelSerializer):

AKModel/templates/admin/AKModel/export/slides.tex

@@ -19,6 +19,10 @@
 
     \faUser~ {{ translations.who }}
 
+    {% if show_types %}
+        \faList~ {{ translations.types }}
+    {% endif %}
+
     \faClock~ {{ translations.duration }}
 
     \faScroll~{{ translations.reso }}
@@ -45,6 +49,10 @@
 
                 \faUser~ {{ ak.owners_list | latex_escape }}
 
+                {% if show_types %}
+                    \faList~ {{ak.types_list }}
+                {% endif %}
+
                 {% if not result_presentation_mode %}
                     \faClock~ {{ak.durations_list}}
                 {% endif %}

AKModel/tests.py → AKModel/tests/test_views.py

@@ -5,10 +5,21 @@ from django.contrib.auth import get_user_model
 from django.contrib.messages import get_messages
 from django.contrib.messages.storage.base import Message
 from django.test import TestCase
-from django.urls import reverse_lazy, reverse
-
-from AKModel.models import Event, AKOwner, AKCategory, AKTrack, AKRequirement, AK, Room, AKSlot, AKOrgaMessage, \
-    ConstraintViolation, DefaultSlot
+from django.urls import reverse, reverse_lazy
+
+from AKModel.models import (
+    AK,
+    AKCategory,
+    AKOrgaMessage,
+    AKOwner,
+    AKRequirement,
+    AKSlot,
+    AKTrack,
+    ConstraintViolation,
+    DefaultSlot,
+    Event,
+    Room,
+)
 
 
 class BasicViewTests:
@@ -29,9 +40,10 @@ class BasicViewTests:
     since the test framework does not understand the concept of abstract test definitions and would handle this class
     as real test case otherwise, distorting the test results.
     """
+
     # pylint: disable=no-member
     VIEWS = []
-    APP_NAME = ''
+    APP_NAME = ""
     VIEWS_STAFF_ONLY = []
     EDIT_TESTCASES = []
 
@@ -41,16 +53,26 @@ class BasicViewTests:
         """
         user_model = get_user_model()
         self.staff_user = user_model.objects.create(
-            username='Test Staff User', email='teststaff@example.com', password='staffpw',
-            is_staff=True, is_active=True
+            username="Test Staff User",
+            email="teststaff@example.com",
+            password="staffpw",
+            is_staff=True,
+            is_active=True,
         )
         self.admin_user = user_model.objects.create(
-            username='Test Admin User', email='testadmin@example.com', password='adminpw',
-            is_staff=True, is_superuser=True, is_active=True
+            username="Test Admin User",
+            email="testadmin@example.com",
+            password="adminpw",
+            is_staff=True,
+            is_superuser=True,
+            is_active=True,
         )
         self.deactivated_user = user_model.objects.create(
-            username='Test Deactivated User', email='testdeactivated@example.com', password='deactivatedpw',
-            is_staff=True, is_active=False
+            username="Test Deactivated User",
+            email="testdeactivated@example.com",
+            password="deactivatedpw",
+            is_staff=True,
+            is_active=False,
         )
 
     def _name_and_url(self, view_name):
@@ -62,7 +84,9 @@ class BasicViewTests:
         :return: full view name with prefix if applicable, url of the view
         :rtype: str, str
         """
-        view_name_with_prefix = f"{self.APP_NAME}:{view_name[0]}" if self.APP_NAME != "" else view_name[0]
+        view_name_with_prefix = (
+            f"{self.APP_NAME}:{view_name[0]}" if self.APP_NAME != "" else view_name[0]
+        )
         url = reverse(view_name_with_prefix, kwargs=view_name[1])
         return view_name_with_prefix, url
 
@@ -74,7 +98,7 @@ class BasicViewTests:
         :param expected_message: message that should be shown
         :param msg_prefix: prefix for the error message when test fails
         """
-        messages:List[Message] = list(get_messages(response.wsgi_request))
+        messages: List[Message] = list(get_messages(response.wsgi_request))
 
         msg_count = "No message shown to user"
         msg_content = "Wrong message, expected '{expected_message}'"
@@ -95,10 +119,16 @@ class BasicViewTests:
             view_name_with_prefix, url = self._name_and_url(view_name)
             try:
                 response = self.client.get(url)
-                self.assertEqual(response.status_code, 200, msg=f"{view_name_with_prefix} ({url}) broken")
-            except Exception: # pylint: disable=broad-exception-caught
-                self.fail(f"An error occurred during rendering of {view_name_with_prefix} ({url}):"
-                          f"\n\n{traceback.format_exc()}")
+                self.assertEqual(
+                    response.status_code,
+                    200,
+                    msg=f"{view_name_with_prefix} ({url}) broken",
+                )
+            except Exception:  # pylint: disable=broad-exception-caught
+                self.fail(
+                    f"An error occurred during rendering of {view_name_with_prefix} ({url}):"
+                    f"\n\n{traceback.format_exc()}"
+                )
 
     def test_access_control_staff_only(self):
         """
@@ -107,11 +137,16 @@ class BasicViewTests:
         # Not logged in? Views should not be visible
         self.client.logout()
         for view_name_info in self.VIEWS_STAFF_ONLY:
-            expected_response_code = 302 if len(view_name_info) == 2 else view_name_info[2]
+            expected_response_code = (
+                302 if len(view_name_info) == 2 else view_name_info[2]
+            )
             view_name_with_prefix, url = self._name_and_url(view_name_info)
             response = self.client.get(url)
-            self.assertEqual(response.status_code, expected_response_code,
-                             msg=f"{view_name_with_prefix} ({url}) accessible by non-staff")
+            self.assertEqual(
+                response.status_code,
+                expected_response_code,
+                msg=f"{view_name_with_prefix} ({url}) accessible by non-staff",
+            )
 
         # Logged in? Views should be visible
         self.client.force_login(self.staff_user)
@@ -119,20 +154,30 @@ class BasicViewTests:
             view_name_with_prefix, url = self._name_and_url(view_name_info)
             try:
                 response = self.client.get(url)
-                self.assertEqual(response.status_code, 200,
-                                 msg=f"{view_name_with_prefix} ({url}) should be accessible for staff (but isn't)")
+                self.assertEqual(
+                    response.status_code,
+                    200,
+                    msg=f"{view_name_with_prefix} ({url}) should be accessible for staff (but isn't)",
+                )
             except Exception:  # pylint: disable=broad-exception-caught
-                self.fail(f"An error occurred during rendering of {view_name_with_prefix} ({url}):"
-                          f"\n\n{traceback.format_exc()}")
+                self.fail(
+                    f"An error occurred during rendering of {view_name_with_prefix} ({url}):"
+                    f"\n\n{traceback.format_exc()}"
+                )
 
         # Disabled user? Views should not be visible
         self.client.force_login(self.deactivated_user)
         for view_name_info in self.VIEWS_STAFF_ONLY:
-            expected_response_code = 302 if len(view_name_info) == 2 else view_name_info[2]
+            expected_response_code = (
+                302 if len(view_name_info) == 2 else view_name_info[2]
+            )
             view_name_with_prefix, url = self._name_and_url(view_name_info)
             response = self.client.get(url)
-            self.assertEqual(response.status_code, expected_response_code,
-                             msg=f"{view_name_with_prefix} ({url}) still accessible for deactivated user")
+            self.assertEqual(
+                response.status_code,
+                expected_response_code,
+                msg=f"{view_name_with_prefix} ({url}) still accessible for deactivated user",
+            )
 
     def _to_sendable_value(self, val):
         """
@@ -182,16 +227,26 @@ class BasicViewTests:
             self.client.logout()
 
         response = self.client.get(url)
-        self.assertEqual(response.status_code, 200, msg=f"{name}: Could not load edit form via GET ({url})")
+        self.assertEqual(
+            response.status_code,
+            200,
+            msg=f"{name}: Could not load edit form via GET ({url})",
+        )
 
         form = response.context[form_name]
-        data = {k:self._to_sendable_value(v) for k,v in form.initial.items()}
+        data = {k: self._to_sendable_value(v) for k, v in form.initial.items()}
 
         response = self.client.post(url, data=data)
         if expected_code == 200:
-            self.assertEqual(response.status_code, 200, msg=f"{name}: Did not return 200 ({url}")
+            self.assertEqual(
+                response.status_code, 200, msg=f"{name}: Did not return 200 ({url}"
+            )
         elif expected_code == 302:
-            self.assertRedirects(response, target_url, msg_prefix=f"{name}: Did not redirect ({url} -> {target_url}")
+            self.assertRedirects(
+                response,
+                target_url,
+                msg_prefix=f"{name}: Did not redirect ({url} -> {target_url}",
+            )
         if expected_message != "":
             self._assert_message(response, expected_message, msg_prefix=f"{name}")
 
@@ -200,30 +255,42 @@ class ModelViewTests(BasicViewTests, TestCase):
     """
     Basic view test cases for views from AKModel plus some custom tests
     """
-    fixtures = ['model.json']
+
+    fixtures = ["model.json"]
 
     ADMIN_MODELS = [
-        (Event, 'event'), (AKOwner, 'akowner'), (AKCategory, 'akcategory'), (AKTrack, 'aktrack'),
-        (AKRequirement, 'akrequirement'), (AK, 'ak'), (Room, 'room'), (AKSlot, 'akslot'),
-        (AKOrgaMessage, 'akorgamessage'), (ConstraintViolation, 'constraintviolation'),
-        (DefaultSlot, 'defaultslot')
+        (Event, "event"),
+        (AKOwner, "akowner"),
+        (AKCategory, "akcategory"),
+        (AKTrack, "aktrack"),
+        (AKRequirement, "akrequirement"),
+        (AK, "ak"),
+        (Room, "room"),
+        (AKSlot, "akslot"),
+        (AKOrgaMessage, "akorgamessage"),
+        (ConstraintViolation, "constraintviolation"),
+        (DefaultSlot, "defaultslot"),
     ]
 
     VIEWS_STAFF_ONLY = [
-        ('admin:index', {}),
-        ('admin:event_status', {'event_slug': 'kif42'}),
-        ('admin:event_requirement_overview', {'event_slug': 'kif42'}),
-        ('admin:ak_csv_export', {'event_slug': 'kif42'}),
-        ('admin:ak_wiki_export', {'slug': 'kif42'}),
-        ('admin:ak_delete_orga_messages', {'event_slug': 'kif42'}),
-        ('admin:ak_slide_export', {'event_slug': 'kif42'}),
-        ('admin:default-slots-editor', {'event_slug': 'kif42'}),
-        ('admin:room-import', {'event_slug': 'kif42'}),
-        ('admin:new_event_wizard_start', {}),
+        ("admin:index", {}),
+        ("admin:event_status", {"event_slug": "kif42"}),
+        ("admin:event_requirement_overview", {"event_slug": "kif42"}),
+        ("admin:ak_csv_export", {"event_slug": "kif42"}),
+        ("admin:ak_wiki_export", {"slug": "kif42"}),
+        ("admin:ak_delete_orga_messages", {"event_slug": "kif42"}),
+        ("admin:ak_slide_export", {"event_slug": "kif42"}),
+        ("admin:default-slots-editor", {"event_slug": "kif42"}),
+        ("admin:room-import", {"event_slug": "kif42"}),
+        ("admin:new_event_wizard_start", {}),
     ]
 
     EDIT_TESTCASES = [
-        {'view': 'admin:default-slots-editor', 'kwargs': {'event_slug': 'kif42'}, "admin": True},
+        {
+            "view": "admin:default-slots-editor",
+            "kwargs": {"event_slug": "kif42"},
+            "admin": True,
+        },
     ]
 
     def test_admin(self):
@@ -234,24 +301,32 @@ class ModelViewTests(BasicViewTests, TestCase):
         for model in self.ADMIN_MODELS:
             # Special treatment for a subset of views (where we exchanged default functionality, e.g., create views)
             if model[1] == "event":
-                _, url = self._name_and_url(('admin:new_event_wizard_start', {}))
+                _, url = self._name_and_url(("admin:new_event_wizard_start", {}))
             elif model[1] == "room":
-                _, url = self._name_and_url(('admin:room-new', {}))
+                _, url = self._name_and_url(("admin:room-new", {}))
             # Otherwise, just call the creation form view
             else:
-                _, url = self._name_and_url((f'admin:AKModel_{model[1]}_add', {}))
+                _, url = self._name_and_url((f"admin:AKModel_{model[1]}_add", {}))
             response = self.client.get(url)
-            self.assertEqual(response.status_code, 200, msg=f"Add form for model {model[1]} ({url}) broken")
+            self.assertEqual(
+                response.status_code,
+                200,
+                msg=f"Add form for model {model[1]} ({url}) broken",
+            )
 
         for model in self.ADMIN_MODELS:
             # Test the update view using the first existing instance of each model
             m = model[0].objects.first()
             if m is not None:
                 _, url = self._name_and_url(
-                    (f'admin:AKModel_{model[1]}_change', {'object_id': m.pk})
+                    (f"admin:AKModel_{model[1]}_change", {"object_id": m.pk})
                 )
                 response = self.client.get(url)
-                self.assertEqual(response.status_code, 200, msg=f"Edit form for model {model[1]} ({url}) broken")
+                self.assertEqual(
+                    response.status_code,
+                    200,
+                    msg=f"Edit form for model {model[1]} ({url}) broken",
+                )
 
     def test_wiki_export(self):
         """
@@ -260,17 +335,27 @@ class ModelViewTests(BasicViewTests, TestCase):
         """
         self.client.force_login(self.admin_user)
 
-        export_url = reverse_lazy("admin:ak_wiki_export", kwargs={'slug': 'kif42'})
+        export_url = reverse_lazy("admin:ak_wiki_export", kwargs={"slug": "kif42"})
         response = self.client.get(export_url)
         self.assertEqual(response.status_code, 200, "Export not working at all")
 
         export_count = 0
         for _, aks in response.context["categories_with_aks"]:
             for ak in aks:
-                self.assertEqual(ak.include_in_export, True,
-                                 f"AK with export flag set to False (pk={ak.pk}) included in export")
-                self.assertNotEqual(ak.pk, 1, "AK known to be excluded from export (PK 1) included in export")
+                self.assertEqual(
+                    ak.include_in_export,
+                    True,
+                    f"AK with export flag set to False (pk={ak.pk}) included in export",
+                )
+                self.assertNotEqual(
+                    ak.pk,
+                    1,
+                    "AK known to be excluded from export (PK 1) included in export",
+                )
                 export_count += 1
 
-        self.assertEqual(export_count, AK.objects.filter(event_id=2, include_in_export=True).count(),
-                         "Wiki export contained the wrong number of AKs")
+        self.assertEqual(
+            export_count,
+            AK.objects.filter(event_id=2, include_in_export=True).count(),
+            "Wiki export contained the wrong number of AKs",
+        )

AKModel/urls.py

@@ -4,9 +4,10 @@ from django.urls import include, path
 from rest_framework.routers import DefaultRouter
 
 import AKModel.views.api
-from AKModel.views.manage import ExportSlidesView, PlanPublishView, PlanUnpublishView, DefaultSlotEditorView, \
-    AKsByUserView
-from AKModel.views.ak import AKRequirementOverview, AKCSVExportView, AKWikiExportView, AKMessageDeleteView
+from AKModel.views.manage import ExportSlidesView, PlanPublishView, PlanUnpublishView, \
+     PollPublishView, PollUnpublishView, DefaultSlotEditorView, AKsByUserView
+from AKModel.views.ak import AKRequirementOverview, AKCSVExportView, AKWikiExportView, \
+     AKMessageDeleteView
 from AKModel.views.event_wizard import NewEventWizardStartView, NewEventWizardPrepareImportView, \
     NewEventWizardImportView, NewEventWizardActivateView, NewEventWizardFinishView, NewEventWizardSettingsView
 from AKModel.views.room import RoomBatchCreationView
@@ -44,6 +45,11 @@ if apps.is_installed("AKSubmission"):
     from AKSubmission.api import increment_interest_counter
     extra_paths.append(path('api/ak/<pk>/indicate-interest/', increment_interest_counter, name='submission-ak-indicate-interest'))
 
+# If AKSolverInterface is active, register additional API endpoints
+if apps.is_installed("AKSolverInterface"):
+     from AKSolverInterface.api import ExportEventForSolverViewSet
+     api_router.register("solver-export", ExportEventForSolverViewSet, basename="solver-export")
+
 event_specific_paths = [
     path('api/', include(api_router.urls), name='api'),
 ]
@@ -103,6 +109,8 @@ def get_admin_urls_event(admin_site):
         path('<slug:event_slug>/ak-slide-export/', admin_site.admin_view(ExportSlidesView.as_view()), name="ak_slide_export"),
         path('plan/publish/', admin_site.admin_view(PlanPublishView.as_view()), name="plan-publish"),
         path('plan/unpublish/', admin_site.admin_view(PlanUnpublishView.as_view()), name="plan-unpublish"),
+        path('poll/publish/', admin_site.admin_view(PollPublishView.as_view()), name="poll-publish"),
+        path('poll/unpublish/', admin_site.admin_view(PollUnpublishView.as_view()), name="poll-unpublish"),
         path('<slug:event_slug>/defaultSlots/', admin_site.admin_view(DefaultSlotEditorView.as_view()),
              name="default-slots-editor"),
         path('<slug:event_slug>/importRooms/', admin_site.admin_view(RoomBatchCreationView.as_view()),

AKModel/views/manage.py

@@ -8,13 +8,13 @@ from django.contrib import messages
 from django.db.models.functions import Now
 from django.utils.dateparse import parse_datetime
 from django.utils.translation import gettext_lazy as _
-from django.views.generic import TemplateView, DetailView
+from django.views.generic import DetailView, ListView, TemplateView
 from django_tex.core import render_template_with_context, run_tex_in_directory
 from django_tex.response import PDFResponse
 
 from AKModel.forms import SlideExportForm, DefaultSlotEditorForm
 from AKModel.metaviews.admin import EventSlugMixin, IntermediateAdminView, IntermediateAdminActionView, AdminViewMixin
-from AKModel.models import ConstraintViolation, Event, DefaultSlot, AKOwner
+from AKModel.models import ConstraintViolation, Event, DefaultSlot, AKOwner, AKSlot, AKType
 
 
 class UserView(TemplateView):
@@ -35,6 +35,19 @@ class ExportSlidesView(EventSlugMixin, IntermediateAdminView):
     title = _('Export AK Slides')
     form_class = SlideExportForm
 
+    def get_form(self, form_class=None):
+        # Filter type choices to those of the current event
+        # or completely hide the field if no types are specified for this event
+        form = super().get_form(form_class)
+        if self.event.aktype_set.count() > 0:
+            form.fields['types'].choices = [
+                (ak_type.id, ak_type.name) for ak_type in self.event.aktype_set.all()
+            ]
+        else:
+            form.fields['types'].widget = form.fields['types'].hidden_widget()
+            form.fields['types_all_selected_only'].widget = form.fields['types_all_selected_only'].hidden_widget()
+        return form
+
     def form_valid(self, form):
         # pylint: disable=invalid-name
         template_name = 'admin/AKModel/export/slides.tex'
@@ -51,6 +64,7 @@ class ExportSlidesView(EventSlugMixin, IntermediateAdminView):
             'reso': _("Reso intention?"),
             'category': _("Category (for Wishes)"),
             'wishes': _("Wishes"),
+            'types': _("Types"),
         }
 
         def build_ak_list_with_next_aks(ak_list):
@@ -58,23 +72,36 @@ class ExportSlidesView(EventSlugMixin, IntermediateAdminView):
             Create a list of tuples cosisting of an AK and a list of upcoming AKs (list length depending on setting)
             """
             next_aks_list = zip_longest(*[ak_list[i + 1:] for i in range(NEXT_AK_LIST_LENGTH)], fillvalue=None)
-            return [(ak, next_aks) for ak, next_aks in zip_longest(ak_list, next_aks_list, fillvalue=[])]
+            return list(zip_longest(ak_list, next_aks_list, fillvalue=[]))
+
+        # Create a list of types to filter AKs by (if at least one type was selected)
+        types = None
+        types_filter_string = ""
+        show_types = self.event.aktype_set.count() > 0
+        if len(form.cleaned_data['types']) > 0:
+            types = AKType.objects.filter(id__in=form.cleaned_data['types'])
+            names_string = ', '.join(AKType.objects.get(pk=t).name for t in form.cleaned_data['types'])
+            types_filter_string = f"[{_('Type(s)')}: {names_string}]"
+        types_all_selected_only = form.cleaned_data['types_all_selected_only']
 
         # Get all relevant AKs (wishes separately, and either all AKs or only those who should directly or indirectly
         # be presented when restriction setting was chosen)
         categories_with_aks, ak_wishes = self.event.get_categories_with_aks(wishes_seperately=True, filter_func=lambda
-            ak: not RESULT_PRESENTATION_MODE or (ak.present or (ak.present is None and ak.category.present_by_default)))
+            ak: not RESULT_PRESENTATION_MODE or (ak.present or (ak.present is None and ak.category.present_by_default)),
+                                                                    types=types,
+                                                                    types_all_selected_only=types_all_selected_only)
 
         # Create context for LaTeX rendering
         context = {
             'title': self.event.name,
             'categories_with_aks': [(category, build_ak_list_with_next_aks(ak_list)) for category, ak_list in
                                     categories_with_aks],
-            'subtitle': _("AKs"),
+            'subtitle': _("AKs") + " " + types_filter_string,
             "wishes": build_ak_list_with_next_aks(ak_wishes),
             "translations": translations,
             "result_presentation_mode": RESULT_PRESENTATION_MODE,
             "space_for_notes_in_wishes": SPACE_FOR_NOTES_IN_WISHES,
+            "show_types": show_types,
         }
 
         source = render_template_with_context(template_name, context)
@@ -130,6 +157,28 @@ class CVSetLevelWarningView(IntermediateAdminActionView):
     def action(self, form):
         self.entities.update(level=ConstraintViolation.ViolationLevel.WARNING)
 
+class ClearScheduleView(IntermediateAdminActionView, ListView):
+    """
+    Admin action view: Clear schedule
+    """
+    title = _('Clear schedule')
+    model = AKSlot
+    confirmation_message = _('Clear schedule. The following scheduled AKSlots will be reset')
+    success_message = _('Schedule cleared')
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.entities = AKSlot.objects.none()
+
+    def get_queryset(self, *args, **kwargs):
+        query_set = super().get_queryset(*args, **kwargs)
+        # do not reset fixed AKs
+        query_set = query_set.filter(fixed=False)
+        return query_set
+
+    def action(self, form):
+        """Reset rooms and start for all selected slots."""
+        self.entities.update(room=None, start=None)
 
 class PlanPublishView(IntermediateAdminActionView):
     """
@@ -157,6 +206,31 @@ class PlanUnpublishView(IntermediateAdminActionView):
         self.entities.update(plan_published_at=None, plan_hidden=True)
 
 
+class PollPublishView(IntermediateAdminActionView):
+    """
+    Admin action view: Publish the preference poll of one or multitple event(s)
+    """
+    title = _('Publish preference poll')
+    model = Event
+    confirmation_message = _('Publish the poll(s) of:')
+    success_message = _('Preference poll published')
+
+    def action(self, form):
+        self.entities.update(poll_published_at=Now(), poll_hidden=False)
+
+
+class PollUnpublishView(IntermediateAdminActionView):
+    """
+    Admin action view: Unpublish the preference poll of one or multitple event(s)
+    """
+    title = _('Unpublish preference poll')
+    model = Event
+    confirmation_message = _('Unpublish the preference poll(s) of:')
+    success_message = _('Preference poll unpublished')
+
+    def action(self, form):
+        self.entities.update(poll_published_at=None, poll_hidden=True)
+
 class DefaultSlotEditorView(EventSlugMixin, IntermediateAdminView):
     """
     Admin view: Allow to edit the default slots of an event

AKModel/views/status.py

@@ -152,6 +152,17 @@ class EventAKsWidget(TemplateStatusWidget):
                 },
             ]
         )
+        if apps.is_installed("AKSolverInterface"):
+            actions.extend([
+                {
+                    "text": _("Export AKs as JSON"),
+                    "url": reverse_lazy("admin:ak_json_export", kwargs={"event_slug": context["event"].slug}),
+                },
+                {
+                    "text": _("Import AK schedule from JSON"),
+                    "url": reverse_lazy("admin:ak_schedule_json_import", kwargs={"event_slug": context["event"].slug}),
+                },
+            ])
         return actions
 
 

AKPlan/locale/de_DE/LC_MESSAGES/django.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-05-15 20:03+0200\n"
+"POT-Creation-Date: 2025-06-16 12:44+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -38,45 +38,65 @@ msgstr "Veranstaltung"
 #: AKPlan/templates/AKPlan/plan_index.html:59
 #: AKPlan/templates/AKPlan/plan_room.html:13
 #: AKPlan/templates/AKPlan/plan_room.html:59
-#: AKPlan/templates/AKPlan/plan_wall.html:65
+#: AKPlan/templates/AKPlan/plan_wall.html:67
 msgid "Room"
 msgstr "Raum"
 
-#: AKPlan/templates/AKPlan/plan_index.html:80
+#: AKPlan/templates/AKPlan/plan_index.html:120
 #: AKPlan/templates/AKPlan/plan_room.html:11
 #: AKPlan/templates/AKPlan/plan_track.html:9
 msgid "AK Plan"
 msgstr "AK-Plan"
 
-#: AKPlan/templates/AKPlan/plan_index.html:92
+#: AKPlan/templates/AKPlan/plan_index.html:134
 #: AKPlan/templates/AKPlan/plan_room.html:49
 msgid "Rooms"
 msgstr "Räume"
 
-#: AKPlan/templates/AKPlan/plan_index.html:105
+#: AKPlan/templates/AKPlan/plan_index.html:147
 #: AKPlan/templates/AKPlan/plan_track.html:36
 msgid "Tracks"
 msgstr "Tracks"
 
-#: AKPlan/templates/AKPlan/plan_index.html:117
+#: AKPlan/templates/AKPlan/plan_index.html:159
 msgid "AK Wall"
 msgstr "AK-Wall"
 
-#: AKPlan/templates/AKPlan/plan_index.html:130
-#: AKPlan/templates/AKPlan/plan_wall.html:130
+#: AKPlan/templates/AKPlan/plan_index.html:165
+msgid "Plan:"
+msgstr "Plan:"
+
+#: AKPlan/templates/AKPlan/plan_index.html:171
+msgid "Filter by types"
+msgstr "Nach Typen filtern"
+
+#: AKPlan/templates/AKPlan/plan_index.html:174
+msgid "Types:"
+msgstr "Typen:"
+
+#: AKPlan/templates/AKPlan/plan_index.html:182
+msgid "AKs without type"
+msgstr "AKs ohne Typ"
+
+#: AKPlan/templates/AKPlan/plan_index.html:186
+msgid "No AKs with additional other types"
+msgstr "Keine AKs, die noch zusätzlich andere Typen haben"
+
+#: AKPlan/templates/AKPlan/plan_index.html:198
+#: AKPlan/templates/AKPlan/plan_wall.html:132
 msgid "Current AKs"
 msgstr "Aktuelle AKs"
 
-#: AKPlan/templates/AKPlan/plan_index.html:137
-#: AKPlan/templates/AKPlan/plan_wall.html:135
+#: AKPlan/templates/AKPlan/plan_index.html:205
+#: AKPlan/templates/AKPlan/plan_wall.html:137
 msgid "Next AKs"
 msgstr "Nächste AKs"
 
-#: AKPlan/templates/AKPlan/plan_index.html:145
+#: AKPlan/templates/AKPlan/plan_index.html:213
 msgid "This event is not active."
 msgstr "Dieses Event ist nicht aktiv."
 
-#: AKPlan/templates/AKPlan/plan_index.html:158
+#: AKPlan/templates/AKPlan/plan_index.html:226
 #: AKPlan/templates/AKPlan/plan_room.html:77
 #: AKPlan/templates/AKPlan/plan_track.html:58
 msgid "Plan is not visible (yet)."
@@ -99,10 +119,14 @@ msgstr "Eigenschaften"
 msgid "Track"
 msgstr "Track"
 
-#: AKPlan/templates/AKPlan/plan_wall.html:145
+#: AKPlan/templates/AKPlan/plan_wall.html:147
 msgid "Reload page automatically?"
 msgstr "Seite automatisch neu laden?"
 
 #: AKPlan/templates/AKPlan/slots_table.html:14
 msgid "No AKs"
 msgstr "Keine AKs"
+
+#: AKPlan/views.py:64
+msgid "Invalid type filter"
+msgstr "Ungültiger Typ-Filter"

AKPlan/templates/AKPlan/plan_index.html

@@ -70,6 +70,46 @@
                 }
             });
         </script>
+
+        {% if type_filtering_active %}
+            {# Type filter script #}
+            <script type="module">
+                const { createApp } = Vue
+
+                createApp({
+                    delimiters: ["[[", "]]"],
+                    data() {
+                      return {
+                          types: JSON.parse("{{ types | escapejs }}"),
+                          strict: {{ types_filter_strict|yesno:"true,false" }},
+                          empty: {{ types_filter_empty|yesno:"true,false" }}
+                      }
+                    },
+                    methods: {
+                        onFilterChange(type) {
+                            // Re-generate filter url
+                            const typeString = "types="
+                                + this.types
+                                .map(t => `${t.slug}:${t.state ? 'yes' : 'no'}`)
+                                .join(',')
+                                + `&strict=${this.strict ? 'yes' : 'no'}`
+                                + `&empty=${this.empty ? 'yes' : 'no'}`;
+
+                            // Redirect to the new url including the adjusted filters
+                            const baseUrl = window.location.origin + window.location.pathname;
+                            window.location.href = `${baseUrl}?${typeString}`;
+                          }
+                    }
+                }).mount('#filter');
+
+                // Prevent showing of cached form values for filter inputs when using broswer navigation
+                window.addEventListener('pageshow', function(event) {
+                  if (event.persisted) {
+                    window.location.reload();
+                  }
+                });
+            </script>
+        {% endif %}
     {% endif %}
 {% endblock %}
 
@@ -83,6 +123,8 @@
 
 
 {% block content %}
+    {% include "messages.html" %}
+
     <div class="float-end">
         <ul class="nav nav-pills">
             {% if rooms|length > 0 %}
@@ -114,13 +156,39 @@
             {% if event.active %}
                 <li class="nav-item">
                     <a class="nav-link active"
-                       href="{% url 'plan:plan_wall' event_slug=event.slug %}">{% fa6_icon 'desktop' 'fas' %}&nbsp;&nbsp;{% trans "AK Wall" %}</a>
+                       href="{% url 'plan:plan_wall' event_slug=event.slug %}?{{ query_string }}">{% fa6_icon 'desktop' 'fas' %}&nbsp;&nbsp;{% trans "AK Wall" %}</a>
                 </li>
             {% endif %}
         </ul>
     </div>
 
-    <h1>Plan: {{ event }}</h1>
+    <h1 class="mb-3">{%  trans "Plan:" %} {{ event }}</h1>
+
+    {% if type_filtering_active %}
+        {# Type filter HTML #}
+        <div class="card border-primary mb-3">
+            <div class="card-header">
+                {% trans 'Filter by types' %}
+            </div>
+            <div class="card-body d-flex" id="filter">
+                {% trans "Types:" %}
+                <div id="filterTypes" class="d-flex">
+                    <div class="form-check form-switch ms-3"  v-for="type in types">
+                        <label class="form-check-label" :for="'typeFilterType' + type.slug">[[ type.name ]]</label>
+                        <input class="form-check-input" type="checkbox" :id="'typeFilterType' + type.slug " v-model="type.state" @change="onFilterChange()">
+                    </div>
+                </div>
+                <div class="form-check form-switch ms-5">
+                    <label class="form-check-label" for="typeFilterEmpty">{% trans "AKs without type" %}</label>
+                    <input class="form-check-input" type="checkbox" id="typeFilterEmpty" v-model="empty" @change="onFilterChange()">
+                </div>
+                <div class="form-check form-switch ms-5">
+                    <label class="form-check-label" for="typeFilterStrict">{% trans "No AKs with additional other types" %}</label>
+                    <input class="form-check-input" type="checkbox" id="typeFilterStrict" v-model="strict" @change="onFilterChange()">>
+                </div>
+            </div>
+        </div>
+    {% endif %}
 
     {% timezone event.timezone %}
         <div class="row" style="margin-top:30px;">

AKPlan/tests.py

 from django.test import TestCase
 
-from AKModel.tests import BasicViewTests
+from AKModel.tests.test_views import BasicViewTests
 
 
 class PlanViewTests(BasicViewTests, TestCase):

AKPlan/views.py

-from datetime import timedelta
+import json
+from datetime import datetime, timedelta
 
 from django.conf import settings
+from django.contrib import messages
+from django.db.models import Q
 from django.shortcuts import redirect
 from django.urls import reverse_lazy
-from django.utils.datetime_safe import datetime
-from django.views.generic import ListView, DetailView
+from django.views.generic import DetailView, ListView
+from django.utils.translation import gettext_lazy as _
 
-from AKModel.models import AKSlot, Room, AKTrack
 from AKModel.metaviews.admin import FilterByEventSlugMixin
+from AKModel.models import AKSlot, AKTrack, Room, AKType
 
 
 class PlanIndexView(FilterByEventSlugMixin, ListView):
@@ -20,10 +23,69 @@ class PlanIndexView(FilterByEventSlugMixin, ListView):
     template_name = "AKPlan/plan_index.html"
     context_object_name = "akslots"
     ordering = "start"
+    types_filter = None
+    query_string = ""
+
+    def get(self, request, *args, **kwargs):
+        if 'types' in request.GET:
+            try:
+                # Initialize types filter, has to be done here such that it is not reused across requests
+                self.types_filter = {
+                    "yes": [],
+                    "no": [],
+                    "no_set": set(),
+                    "strict": False,
+                    "empty": False,
+                }
+                # If types are given, filter the queryset accordingly
+                types_raw = request.GET['types'].split(',')
+                for t in types_raw:
+                    type_slug, type_condition = t.split(':')
+                    if type_condition in ["yes", "no"]:
+                        t = AKType.objects.get(slug=type_slug, event=self.event)
+                        self.types_filter[type_condition].append(t)
+                        if type_condition == "no":
+                            # Store slugs of excluded types in a set for faster lookup
+                            self.types_filter["no_set"].add(t.slug)
+                    else:
+                        raise ValueError(f"Unknown type condition: {type_condition}")
+                if 'strict' in request.GET:
+                    # If strict is specified and marked as "yes",
+                    # exclude all AKs that have any of the excluded types ("no"),
+                    # even if they have other types that are marked as "yes"
+                    self.types_filter["strict"] = request.GET.get('strict') == 'yes'
+                if 'empty' in request.GET:
+                    # If empty is specified and marked as "yes", include AKs that have no types at all
+                    self.types_filter["empty"] = request.GET.get('empty') == 'yes'
+                # Will be used for generating a link to the wall view with the same filter
+                self.query_string = request.GET.urlencode(safe=",:")
+            except (ValueError, AKType.DoesNotExist):
+                # Display an error message if the types parameter is malformed
+                messages.add_message(request, messages.ERROR, _("Invalid type filter"))
+                self.types_filter = None
+        s = super().get(request, *args, **kwargs)
+        return s
 
     def get_queryset(self):
         # Ignore slots not scheduled yet
-        return super().get_queryset().filter(start__isnull=False).select_related('ak', 'room', 'ak__category')
+        qs = (super().get_queryset().filter(start__isnull=False).
+                select_related('event', 'ak', 'room', 'ak__category', 'ak__event'))
+                # Need to prefetch both event and ak__event
+                # since django is not aware that the two are always the same
+
+        # Apply type filter if necessary
+        if self.types_filter:
+            # Either include all AKs with the given types or without any types at all
+            if self.types_filter["empty"]:
+                qs = qs.filter(Q(ak__types__in=self.types_filter["yes"]) | Q(ak__types__isnull=True)).distinct()
+            # Or only those with the given types
+            else:
+                qs = qs.filter(ak__types__in=self.types_filter["yes"]).distinct()
+            # Afterwards, if strict, exclude all AKs that have any of the excluded types,
+            # even though they were included by the previous filter
+            if self.types_filter["strict"]:
+                qs = qs.exclude(ak__types__in=self.types_filter["no"]).distinct()
+        return qs
 
     def get_context_data(self, *, object_list=None, **kwargs):
         context = super().get_context_data(object_list=object_list, **kwargs)
@@ -39,6 +101,7 @@ class PlanIndexView(FilterByEventSlugMixin, ListView):
 
         # Get list of current and next slots
         for akslot in context["akslots"]:
+            self._process_slot(akslot)
             # Construct a list of all rooms used by these slots on the fly
             if akslot.room is not None:
                 rooms.add(akslot.room)
@@ -61,8 +124,38 @@ class PlanIndexView(FilterByEventSlugMixin, ListView):
 
         context["tracks"] = self.event.aktrack_set.all()
 
+        # Pass query string to template for generating a matching wall link
+        context["query_string"] = self.query_string
+
+        # Generate a list of all types and their current selection state for graphic filtering
+        types = [{"name": t.name, "slug": t.slug, "state": True} for t in self.event.aktype_set.all()]
+        if len(types) > 0:
+            context["type_filtering_active"] = True
+            if self.types_filter:
+                for t in types:
+                    if t["slug"] in self.types_filter["no_set"]:
+                        t["state"] = False
+            # Pass type list as well as filter state for strict filtering and empty types to the template
+            context["types"] = json.dumps(types)
+            context["types_filter_strict"] = False
+            context["types_filter_empty"] = False
+            if self.types_filter:
+                context["types_filter_empty"] = self.types_filter["empty"]
+                context["types_filter_strict"] = self.types_filter["strict"]#
+        else:
+            context["type_filtering_active"] = False
+
         return context
 
+    def _process_slot(self, akslot):
+        """
+        Function to be called for each slot when looping over the slots
+        (meant to be overridden in inherited views)
+
+        :param akslot: current slot
+        :type akslot: AKSlot
+        """
+
 
 class PlanScreenView(PlanIndexView):
     """
@@ -96,26 +189,12 @@ class PlanScreenView(PlanIndexView):
 
         # Restrict AK slots to relevant ones
         # This will automatically filter all rooms not needed for the selected range in the orginal get_context method
-        akslots = super().get_queryset().filter(start__gt=self.start)
+        return super().get_queryset().filter(start__gt=self.start)
 
+    def get_context_data(self, *, object_list=None, **kwargs):
         # Find the earliest hour AKs start and end (handle 00:00 as 24:00)
         self.earliest_start_hour = 23
         self.latest_end_hour = 1
-        for akslot in akslots.all():
-            start_hour = akslot.start.astimezone(self.event.timezone).hour
-            if start_hour < self.earliest_start_hour:
-                # Use hour - 1 to improve visibility of date change
-                self.earliest_start_hour = max(start_hour - 1, 0)
-            end_hour = akslot.end.astimezone(self.event.timezone).hour
-            # Special case: AK starts before but ends after midnight -- show until midnight
-            if end_hour < start_hour:
-                self.latest_end_hour = 24
-            elif end_hour > self.latest_end_hour:
-                # Always use hour + 1, since AK may end at :xy and not always at :00
-                self.latest_end_hour = min(end_hour + 1, 24)
-        return akslots
-
-    def get_context_data(self, *, object_list=None, **kwargs):
         context = super().get_context_data(object_list=object_list, **kwargs)
         context["start"] = self.start
         context["end"] = self.event.end
@@ -123,6 +202,19 @@ class PlanScreenView(PlanIndexView):
         context["latest_end_hour"] = self.latest_end_hour
         return context
 
+    def _process_slot(self, akslot):
+        start_hour = akslot.start.astimezone(self.event.timezone).hour
+        if start_hour < self.earliest_start_hour:
+            # Use hour - 1 to improve visibility of date change
+            self.earliest_start_hour = max(start_hour - 1, 0)
+        end_hour = akslot.end.astimezone(self.event.timezone).hour
+        # Special case: AK starts before but ends after midnight -- show until midnight
+        if end_hour < start_hour:
+            self.latest_end_hour = 24
+        elif end_hour > self.latest_end_hour:
+            # Always use hour + 1, since AK may end at :xy and not always at :00
+            self.latest_end_hour = min(end_hour + 1, 24)
+
 
 class PlanRoomView(FilterByEventSlugMixin, DetailView):
     """
@@ -152,7 +244,7 @@ class PlanTrackView(FilterByEventSlugMixin, DetailView):
         context = super().get_context_data(object_list=object_list, **kwargs)
         # Restrict AKSlot list to given track
         # while joining AK, room and category information to reduce the amount of necessary SQL queries
-        context["slots"] = AKSlot.objects.\
-            filter(event=self.event, ak__track=context['track']).\
+        context["slots"] = AKSlot.objects. \
+            filter(event=self.event, ak__track=context['track']). \
             select_related('ak', 'room', 'ak__category')
         return context

AKPlanning/settings.py

@@ -10,6 +10,7 @@ For the full list of settings and their values, see
 https://docs.djangoproject.com/en/2.2/ref/settings/
 """
 
+import decimal
 import os
 
 from django.utils.translation import gettext_lazy as _
@@ -38,6 +39,8 @@ INSTALLED_APPS = [
     'AKScheduling.apps.AkschedulingConfig',
     'AKPlan.apps.AkplanConfig',
     'AKOnline.apps.AkonlineConfig',
+    'AKPreference.apps.AkpreferenceConfig',
+    'AKSolverInterface.apps.AksolverinterfaceConfig',
     'AKModel.apps.AKAdminConfig',
     'django.contrib.auth',
     'django.contrib.contenttypes',
@@ -221,6 +224,12 @@ DASHBOARD_RECENT_MAX = 25
 # (active events will always be featured, even if their number is higher than this threshold)
 DASHBOARD_MAX_FEATURED_EVENTS = 3
 
+# In the export to the solver we need to calculate the integer number
+# of discrete time slots covered by an AK. This is done by rounding
+# the 'exact' number up. To avoid 'overshooting' by 1
+# due to FLOP inaccuracies, we subtract this small epsilon before rounding.
+EXPORT_CEIL_OFFSET_EPS = decimal.Decimal(1e-4)
+
 # Registration/login behavior
 SIMPLE_BACKEND_REDIRECT_URL = "/user/"
 LOGIN_REDIRECT_URL = SIMPLE_BACKEND_REDIRECT_URL

AKPlanning/urls.py

@@ -37,3 +37,5 @@ if apps.is_installed("AKDashboard"):
     urlpatterns.append(path('', include('AKDashboard.urls', namespace='dashboard')))
 if apps.is_installed("AKPlan"):
     urlpatterns.append(path('', include('AKPlan.urls', namespace='plan')))
+if apps.is_installed("AKPreference"):
+    urlpatterns.append(path('', include('AKPreference.urls', namespace='poll')))

AKPreference/admin.py

+from django import forms
+from django.contrib import admin
+
+from AKPreference.models import AKPreference, EventParticipant
+from AKModel.admin import PrepopulateWithNextActiveEventMixin, EventRelatedFieldListFilter
+from AKModel.models import AK
+
+@admin.register(EventParticipant)
+class EventParticipantAdmin(PrepopulateWithNextActiveEventMixin, admin.ModelAdmin):
+    """
+    Admin interface for EventParticipant
+    """
+    model = EventParticipant
+    list_display = ['name', 'institution', 'event']
+    list_filter = ['event', 'institution']
+    list_editable = []
+    ordering = ['name']
+
+
+class AKPreferenceAdminForm(forms.ModelForm):
+    """
+    Adapted admin form for AK preferences for usage in :class:`AKPreferenceAdmin`)
+    """
+    class Meta:
+        widgets = {
+            'participant': forms.Select,
+            'ak': forms.Select,
+        }
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        # Filter possible values for foreign keys & m2m when event is specified
+        if hasattr(self.instance, "event") and self.instance.event is not None:
+            self.fields["participant"].queryset = EventParticipant.objects.filter(event=self.instance.event)
+            self.fields["ak"].queryset = AK.objects.filter(event=self.instance.event)
+
+
+@admin.register(AKPreference)
+class AKPreferenceAdmin(PrepopulateWithNextActiveEventMixin, admin.ModelAdmin):
+    """
+    Admin interface for AK preferences.
+    Uses an adapted form (see :class:`AKPreferenceAdminForm`)
+    """
+    model = AKPreference
+    form = AKPreferenceAdminForm
+    list_display = ['preference', 'participant', 'ak', 'event']
+    list_filter = ['event', ('ak', EventRelatedFieldListFilter), ('participant', EventRelatedFieldListFilter)]
+    list_editable = []
+    ordering = ['participant', 'preference', 'ak']