Project create/list API, clip uploads, CORS, public read

- Project gains a clip FileField; POST /api/projects/ creates one from an
  uploaded otio + clip (<=100 MB), owned by the requester
- add /api/me/ and project-detail; scene GET is public (view without login),
  PUT stays owner/collaborator-only
- serve media in DEBUG (range requests for video seek); CORS for the cljs dev
  origin with credentials
- seed_demo now builds the Challengers project from the bundled otio + 480p clip

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

requirements.txt

@@ -1,3 +1,4 @@
 asgiref==3.11.1
 Django==6.0.6
+django-cors-headers==4.9.0
 sqlparse==0.5.5

scenes/admin.py

@@ -10,6 +10,8 @@ class ProjectAdmin(admin.ModelAdmin):
     search_fields = ("name",)
     filter_horizontal = ("collaborators",)
     readonly_fields = ("created", "updated")
+    fields = ("name", "owner", "collaborators", "otio", "clip", "fps", "scene",
+              "created", "updated")
 
 
 @admin.register(Revision)

scenes/management/commands/seed_demo.py

@@ -8,11 +8,13 @@ from django.core.management.base import BaseCommand
 
 from scenes.models import Project
 
-OTIO = settings.BASE_DIR / "tl" / "resources" / "public" / "one_two_three.otio"
+PUBLIC = settings.BASE_DIR / "tl" / "resources" / "public"
+OTIO = PUBLIC / "one_two_three.otio"
+CLIP = PUBLIC / "challengers_480p.mp4"
 
 
 class Command(BaseCommand):
-    help = "Seed a demo project from the bundled OTIO file."
+    help = "Seed the demo Challengers project from the bundled OTIO + clip."
 
     def handle(self, *args, **opts):
         User = get_user_model()
@@ -22,10 +24,14 @@ class Command(BaseCommand):
             return
 
         project, created = Project.objects.get_or_create(
-            owner=owner, name="one two three", defaults={"scene": {}})
+            owner=owner, name="Challengers", defaults={"scene": {}})
         if OTIO.exists() and not project.otio:
             with OTIO.open("rb") as fh:
-                project.otio.save(Path(OTIO).name, File(fh), save=True)
+                project.otio.save(OTIO.name, File(fh), save=True)
+        if CLIP.exists() and not project.clip:
+            with CLIP.open("rb") as fh:
+                project.clip.save(CLIP.name, File(fh), save=True)
 
         verb = "created" if created else "exists"
-        self.stdout.write(f"project #{project.pk} {verb}: {project.name} (otio={bool(project.otio)})")
+        self.stdout.write(f"project #{project.pk} {verb}: {project.name} "
+                          f"(otio={bool(project.otio)} clip={bool(project.clip)})")

scenes/migrations/0004_project_clip.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0.6 on 2026-06-29 05:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('scenes', '0003_project_collaborators'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='project',
+            name='clip',
+            field=models.FileField(blank=True, null=True, upload_to='clips/'),
+        ),
+    ]

scenes/models.py

@@ -15,6 +15,7 @@ class Project(models.Model):
                                            related_name="shared_projects")
     name = models.CharField(max_length=200)
     otio = models.FileField(upload_to="otio/", blank=True, null=True)
+    clip = models.FileField(upload_to="clips/", blank=True, null=True)
     fps = models.FloatField(default=NTSC_24)
     scene = models.JSONField(default=dict, blank=True)
     created = models.DateTimeField(auto_now_add=True)

scenes/urls.py

@@ -3,8 +3,9 @@ from django.urls import path
 from . import views
 
 urlpatterns = [
+    path("me/", views.me),
     path("projects/", views.projects),
+    path("projects/<int:pk>/", views.project),
     path("projects/<int:pk>/scene/", views.scene),
-    path("projects/<int:pk>/otio/", views.otio),
     path("projects/<int:pk>/revisions/", views.revisions),
 ]

scenes/views.py

@@ -1,7 +1,7 @@
 import json
 
 from django.db.models import Q
-from django.http import FileResponse, HttpResponseNotAllowed, JsonResponse
+from django.http import HttpResponseNotAllowed, JsonResponse
 from django.shortcuts import get_object_or_404
 from django.utils import timezone
 from django.views.decorators.csrf import csrf_exempt
@@ -9,6 +9,8 @@ from django.views.decorators.csrf import csrf_exempt
 from .attribution import annotation_layer, apply_attribution
 from .models import Project, Revision
 
+MAX_CLIP_BYTES = 100 * 1024 * 1024
+
 
 def _auth(request):
     """None if logged in, else a 401 JSON response (so fetch() doesn't get a
@@ -24,27 +26,65 @@ def _visible(request):
         Q(owner=request.user) | Q(collaborators=request.user)).distinct()
 
 
-def _owned(request, pk):
+def _editable(request, pk):
+    """The project if the user may edit it (owner/collaborator), else 404."""
     return get_object_or_404(_visible(request), pk=pk)
 
 
+def _meta(request, project):
+    return {
+        "id": project.pk,
+        "name": project.name,
+        "fps": project.fps,
+        "owner": project.owner.get_username(),
+        "otio": request.build_absolute_uri(project.otio.url) if project.otio else None,
+        "clip": request.build_absolute_uri(project.clip.url) if project.clip else None,
+    }
+
+
+def me(request):
+    """GET /api/me/ — who the browser is logged in as (for the UI to gate edits)."""
+    u = request.user
+    return JsonResponse({"authenticated": u.is_authenticated,
+                         "username": u.get_username() if u.is_authenticated else None})
+
+
+@csrf_exempt
 def projects(request):
-    """GET /api/projects/ — the projects the user owns or collaborates on."""
+    """GET — the user's projects; POST — create one from an uploaded otio + clip."""
     if (resp := _auth(request)):
         return resp
-    rows = _visible(request).values("id", "name", "fps", "updated", "owner__username")
-    return JsonResponse(list(rows), safe=False)
+    if request.method == "GET":
+        rows = list(_visible(request).values("id", "name", "fps", "updated", "owner__username"))
+        return JsonResponse(rows, safe=False)
+    if request.method == "POST":
+        name = (request.POST.get("name") or "").strip()
+        otio = request.FILES.get("otio")
+        clip = request.FILES.get("clip")
+        if not (name and otio and clip):
+            return JsonResponse({"detail": "name, otio and clip are required"}, status=400)
+        if clip.size > MAX_CLIP_BYTES:
+            return JsonResponse({"detail": "clip exceeds 100 MB"}, status=400)
+        project = Project.objects.create(owner=request.user, name=name, otio=otio, clip=clip)
+        return JsonResponse(_meta(request, project), status=201)
+    return HttpResponseNotAllowed(["GET", "POST"])
+
+
+def project(request, pk):
+    """GET /api/projects/<pk>/ — project metadata + media URLs (public to view)."""
+    return JsonResponse(_meta(request, get_object_or_404(Project, pk=pk)))
 
 
 @csrf_exempt  # dev convenience: session-auth API without a CSRF token round-trip
 def scene(request, pk):
-    """GET/PUT /api/projects/<pk>/scene/ — read or replace the timeline scene."""
+    """GET (public) the scene; PUT (owner/collaborator) merges a delta into it."""
+    if request.method == "GET":
+        p = get_object_or_404(Project, pk=pk)
+        return JsonResponse({"fps": p.fps, "scene": p.scene})
+    if request.method == "PUT":
         if (resp := _auth(request)):
             return resp
-    project = _owned(request, pk)
-    if request.method == "GET":
-        return JsonResponse({"fps": project.fps, "scene": project.scene})
-    if request.method == "PUT":
+        p = _editable(request, pk)
         # A delta, not the whole scene: {changed: {gid: annotation}, deleted: [gid]}.
         # Merging per-id means two users editing different annotations both land
         # (no clobber); same-annotation edits are last-write-wins by arrival.
@@ -53,23 +93,21 @@ def scene(request, pk):
         deleted = data.get("deleted") or []
         summary = None
         if changed or deleted:
-            groups = dict((project.scene or {}).get("groups", {}))
+            groups = dict((p.scene or {}).get("groups", {}))
             groups.update(changed)
             for gid in deleted:
                 groups.pop(gid, None)
-            merged = dict(project.scene or {}, groups=groups)
-            project.scene, summary, counts = apply_attribution(
-                project.scene, merged, request.user.get_username(),
-                timezone.now().isoformat())
+            merged = dict(p.scene or {}, groups=groups)
+            p.scene, summary, counts = apply_attribution(
+                p.scene, merged, request.user.get_username(), timezone.now().isoformat())
             if any(counts.values()):       # don't log a no-op save
-                Revision.objects.create(project=project, user=request.user,
-                                        summary=summary,
-                                        annotations=annotation_layer(project.scene))
+                Revision.objects.create(project=p, user=request.user, summary=summary,
+                                        annotations=annotation_layer(p.scene))
         if "fps" in data:
-            project.fps = data["fps"]
-        project.save(update_fields=["scene", "fps", "updated"])
-        return JsonResponse({"ok": True, "updated": project.updated, "summary": summary,
-                             "annotations": annotation_layer(project.scene)})
+            p.fps = data["fps"]
+        p.save(update_fields=["scene", "fps", "updated"])
+        return JsonResponse({"ok": True, "updated": p.updated, "summary": summary,
+                             "annotations": annotation_layer(p.scene)})
     return HttpResponseNotAllowed(["GET", "PUT"])
 
 
@@ -77,16 +115,6 @@ def revisions(request, pk):
     """GET /api/projects/<pk>/revisions/ — the save history (who/when/what)."""
     if (resp := _auth(request)):
         return resp
-    project = _owned(request, pk)
-    rows = project.revisions.values("id", "user__username", "created", "summary")
+    p = _editable(request, pk)
+    rows = p.revisions.values("id", "user__username", "created", "summary")
     return JsonResponse(list(rows), safe=False)
-
-
-def otio(request, pk):
-    """GET /api/projects/<pk>/otio/ — serve the uploaded OTIO file."""
-    if (resp := _auth(request)):
-        return resp
-    project = _owned(request, pk)
-    if not project.otio:
-        return JsonResponse({"detail": "no otio uploaded"}, status=404)
-    return FileResponse(project.otio.open("rb"), content_type="application/json")

server/settings.py

@@ -37,10 +37,12 @@ INSTALLED_APPS = [
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
+    'corsheaders',
     'scenes',
 ]
 
 MIDDLEWARE = [
+    'corsheaders.middleware.CorsMiddleware',
     'django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',
@@ -117,8 +119,16 @@ USE_TZ = True
 
 STATIC_URL = 'static/'
 
-# Uploaded OTIO files
+# Uploaded OTIO + clip files
 MEDIA_URL = 'media/'
 MEDIA_ROOT = BASE_DIR / 'media'
 
+# Allow clip uploads up to ~100 MB (files stream to a temp file past 2.5 MB).
+DATA_UPLOAD_MAX_MEMORY_SIZE = 100 * 1024 * 1024
+
+# The shadow-cljs dev frontend talks to this API cross-origin, with the session
+# cookie, so allow its origin + credentials.
+CORS_ALLOWED_ORIGINS = ['http://localhost:8280', 'http://127.0.0.1:8280']
+CORS_ALLOW_CREDENTIALS = True
+
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

server/urls.py

@@ -1,4 +1,6 @@
 """URL configuration for the scene_analysis backend."""
+from django.conf import settings
+from django.conf.urls.static import static
 from django.contrib import admin
 from django.urls import include, path
 
@@ -6,3 +8,7 @@ urlpatterns = [
     path("admin/", admin.site.urls),
     path("api/", include("scenes.urls")),
 ]
+
+# Serve uploaded OTIO/clip files in development (supports HTTP range → video seek).
+if settings.DEBUG:
+    urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)