From fc7761e315242494b5c319a308caac89ba87d703 Mon Sep 17 00:00:00 2001
From: Thomas Steen Rasmussen <tykling@bornhack.org>
Date: Mon, 22 Jun 2020 00:21:23 +0200
Subject: [PATCH] add eventinstance migration script

---
 .../commands/convert_eventinstances.py        | 115 ++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 src/utils/management/commands/convert_eventinstances.py

diff --git a/src/utils/management/commands/convert_eventinstances.py b/src/utils/management/commands/convert_eventinstances.py
new file mode 100644
index 00000000..9e043db4
--- /dev/null
+++ b/src/utils/management/commands/convert_eventinstances.py
@@ -0,0 +1,115 @@
+# coding: utf-8
+import logging
+
+from camps.models import Camp
+from django.core.management.base import BaseCommand
+from program.models import EventInstance, EventSession, EventSlot, SpeakerAvailability
+
+logger = logging.getLogger("bornhack.%s" % __name__)
+
+
+class Command(BaseCommand):
+    args = "none"
+    help = "Migrate eventinstances to eventsessions and eventslots"
+
+    def add_arguments(self, parser):
+        parser.add_argument(
+            "campslug", type=str, help="The slug of the camp to process",
+        )
+
+    def handle(self, *args, **options):
+        camp = Camp.objects.get(slug=options["campslug"])
+        for event_type_id in set(
+            EventInstance.objects.filter(event__track__camp=camp).values_list(
+                "event__event_type", flat=True
+            )
+        ):
+            if event_type_id == 1:
+                # skip facilities
+                continue
+            logger.info(f"processing event type id {event_type_id} ...")
+            for instance in EventInstance.objects.filter(
+                event__track__camp=camp, event__event_type_id=event_type_id
+            ):
+                logger.info(f"processing instance {instance}")
+
+                for speaker in instance.event.speakers.all():
+                    # create speaker availability
+                    try:
+                        sa = SpeakerAvailability.objects.get(
+                            speaker=speaker,
+                            when__adjacent_to=instance.when,
+                            available=True,
+                        )
+                        if sa.when.lower == instance.upper:
+                            # this availability begins when the instance ends
+                            sa.when = (instance.when.lower, sa.when.upper)
+                        else:
+                            # this availability ends when the instance begins
+                            sa.when = (sa.when.lower, instance.when.upper)
+                        sa.save()
+                        logger.info(
+                            f"extended speakeravailability {sa} to include instance {instance}"
+                        )
+                    except SpeakerAvailability.DoesNotExist:
+                        sa = SpeakerAvailability.objects.create(
+                            speaker=speaker, when=instance.when, available=True,
+                        )
+                        logger.info(
+                            f"created speakeravailability {sa} for instance {instance}"
+                        )
+
+                duration = int(
+                    (instance.when.upper - instance.when.lower).total_seconds() / 60
+                )
+                # do we have a matching slot?
+                try:
+                    slot = EventSlot.objects.get(
+                        when=instance.when,
+                        event_session__event_type=instance.event.event_type,
+                    )
+                except EventSlot.DoesNotExist:
+                    slot = None
+
+                if not slot:
+                    logger.info(f"no existing slot found for instance {instance}")
+                    # do we have a session of the matching type and event duration which is adjacent to this eventinstance?
+                    try:
+                        session = EventSession.objects.get(
+                            when__adjacent_to=instance.when,
+                            event_type_id=event_type_id,
+                            event_duration_minutes=duration,
+                        )
+                        logger.info(
+                            f"found existing eventsession adjacent to instance {instance}"
+                        )
+                        if session.when.lower == instance.when.upper:
+                            # session starts when this instance ends
+                            session.when = (instance.when.lower, session.when.upper)
+                        elif session.when.upper == instance.when.lower:
+                            # session ends when this instance starts
+                            session.when = (session.when.lower, instance.when.upper)
+                        logger.info(
+                            f"session has been expanded to include instance {instance}"
+                        )
+                        session.save()
+                        # we should now have a matching slot
+                        slot = EventSlot.objects.get(
+                            when=instance.when,
+                            event_session__event_type=instance.event.event_type,
+                        )
+                    except EventSession.DoesNotExist:
+                        session = EventSession.objects.create(
+                            camp=camp,
+                            event_location=instance.location,
+                            event_type=instance.event.event_type,
+                            when=instance.when,
+                            event_duration_minutes=duration,
+                        )
+                        logger.info(f"created new eventsession {session}")
+                        slot = session.event_slots.get()
+                logger.info(f"found slot {slot} matching instance {instance}")
+                slot.event = instance.event
+                slot.autoscheduled = False
+                slot.save()
+                logger.info(f"saved slot {slot}")