Download archives by session

This replaces the previous download of only the latest archives
with a means to download the archives which were chosen for a
given session.

code_submitter/extract_archives.py

@@ -3,31 +3,43 @@
 import asyncio
 import zipfile
 import argparse
+from typing import cast
 from pathlib import Path
 
 import databases
+from sqlalchemy.sql import select
 
 from . import utils, config
+from .tables import Session
 
 
-async def async_main(output_archive: Path) -> None:
+async def async_main(output_archive: Path, session_name: str) -> None:
     output_archive.parent.mkdir(parents=True, exist_ok=True)
 
     database = databases.Database(config.DATABASE_URL)
 
+    session_id = cast(int, await database.fetch_one(select([
+        Session.c.id,
+    ]).where(
+        Session.c.name == session_name,
+    )))
+
     with zipfile.ZipFile(output_archive) as zf:
         async with database.transaction():
-            utils.collect_submissions(database, zf)
+            utils.collect_submissions(database, zf, session_id)
 
 
 def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser()
+    parser.add_argument('session_name', type=str)
     parser.add_argument('output_archive', type=Path)
     return parser.parse_args()
 
 
 def main(args: argparse.Namespace) -> None:
-    asyncio.get_event_loop().run_until_complete(async_main(args.output_archive))
+    asyncio.get_event_loop().run_until_complete(
+        async_main(args.output_archive, args.session_name),
+    )
 
 
 if __name__ == '__main__':

code_submitter/server.py

@@ -1,6 +1,6 @@
 import io
 import zipfile
-import datetime
+from typing import cast
 
 import databases
 from sqlalchemy.sql import select
@@ -16,7 +16,7 @@
 
 from . import auth, utils, config
 from .auth import User, BLUESHIRT_SCOPE
-from .tables import Archive, ChoiceHistory
+from .tables import Archive, Session, ChoiceHistory
 
 database = databases.Database(config.DATABASE_URL, force_rollback=config.TESTING)
 templates = Jinja2Templates(directory='templates')
@@ -49,10 +49,14 @@ async def homepage(request: Request) -> Response:
             Archive.c.created.desc(),
         ),
     )
+    sessions = await database.fetch_all(
+        Session.select().order_by(Session.c.created.desc()),
+    )
     return templates.TemplateResponse('index.html', {
         'request': request,
         'chosen': chosen,
         'uploads': uploads,
+        'sessions': sessions,
         'BLUESHIRT_SCOPE': BLUESHIRT_SCOPE,
     })
 
@@ -137,14 +141,25 @@ async def create_session(request: Request) -> Response:
 
 
 @requires(['authenticated', BLUESHIRT_SCOPE])
+@database.transaction()
 async def download_submissions(request: Request) -> Response:
+    session_id = cast(int, request.path_params['session_id'])
+
+    session = await database.fetch_one(
+        Session.select().where(Session.c.id == session_id),
+    )
+
+    if session is None:
+        return Response(
+            f"{session_id!r} is not a valid session id",
+            status_code=404,
+        )
+
     buffer = io.BytesIO()
     with zipfile.ZipFile(buffer, mode='w') as zf:
-        await utils.collect_submissions(database, zf)
+        await utils.collect_submissions(database, zf, session_id)
 
-    filename = 'submissions-{now}.zip'.format(
-        now=datetime.datetime.now(datetime.timezone.utc),
-    )
+    filename = f"submissions-{session['name']}.zip"
 
     return Response(
         buffer.getvalue(),
@@ -157,7 +172,11 @@ async def download_submissions(request: Request) -> Response:
     Route('/', endpoint=homepage, methods=['GET']),
     Route('/upload', endpoint=upload, methods=['POST']),
     Route('/create-session', endpoint=create_session, methods=['POST']),
-    Route('/download-submissions', endpoint=download_submissions, methods=['GET']),
+    Route(
+        '/download-submissions/{session_id:int}',
+        endpoint=download_submissions,
+        methods=['GET'],
+    ),
 ]
 
 middleware = [

code_submitter/utils.py

@@ -9,29 +9,24 @@
 
 async def get_chosen_submissions(
     database: databases.Database,
+    session_id: int,
 ) -> Dict[str, Tuple[int, bytes]]:
     """
     Return a mapping of teams to their the chosen archive.
     """
 
-    # Note: Ideally we'd group by team in SQL, however that doesn't seem to work
-    # properly -- we don't get the ordering applied before the grouping.
-
     rows = await database.fetch_all(
         select([
             Archive.c.id,
             Archive.c.team,
             Archive.c.content,
-            ChoiceHistory.c.created,
         ]).select_from(
-            Archive.join(ChoiceHistory),
-        ).order_by(
-            Archive.c.team,
-            ChoiceHistory.c.created.asc(),
+            Archive.join(ChoiceHistory).join(ChoiceForSession),
+        ).where(
+            Session.c.id == session_id,
         ),
     )
 
-    # Rely on later keys replacing earlier occurrences of the same key.
     return {x['team']: (x['id'], x['content']) for x in rows}
 
 
@@ -88,8 +83,9 @@ def summarise(submissions: Dict[str, Tuple[int, bytes]]) -> str:
 async def collect_submissions(
     database: databases.Database,
     zipfile: ZipFile,
+    session_id: int,
 ) -> None:
-    submissions = await get_chosen_submissions(database)
+    submissions = await get_chosen_submissions(database, session_id)
 
     for team, (_, content) in submissions.items():
         zipfile.writestr(f'{team.upper()}.zip', content)

templates/index.html

@@ -31,14 +31,40 @@
   <body>
     <div class="container">
       <h1>Virtual Competition Code Submission</h1>
-      {% if BLUESHIRT_SCOPE in request.auth.scopes %}
       <div class="row">
         <div class="col-sm-6">
-          <a download href="{{ url_for('download_submissions') }}">
-            Download current chosen submissions
-          </a>
+          <h3>Sessions</h3>
+          <table class="table table-striped">
+            <tr>
+              <th scope="col">Name</th>
+              <th scope="col">Created</th>
+              <th scope="col">By</th>
+              {% if BLUESHIRT_SCOPE in request.auth.scopes %}
+              <th scope="col">Download</th>
+              {% endif %}
+            </tr>
+            {% for session in sessions %}
+            <tr>
+              <td>{{ session.name }}</td>
+              <td>{{ session.created }}</td>
+              <td>{{ session.username }}</td>
+              <!-- TODO: teams in the session -->
+              {% if BLUESHIRT_SCOPE in request.auth.scopes %}
+              <td>
+                <a
+                  download
+                  href="{{ url_for('download_submissions', session_id=session.id) }}"
+                >
+                  ▼
+                </a>
+              </td>
+              {% endif %}
+            </tr>
+            {% endfor %}
+          </table>
         </div>
       </div>
+      {% if BLUESHIRT_SCOPE in request.auth.scopes %}
       <div class="row">
         <div class="col-sm-6">
           <form

tests/tests_app.py

@@ -7,7 +7,12 @@
 from sqlalchemy.sql import select
 from starlette.testclient import TestClient
 
-from code_submitter.tables import Archive, Session, ChoiceHistory
+from code_submitter.tables import (
+    Archive,
+    Session,
+    ChoiceHistory,
+    ChoiceForSession,
+)
 
 
 class AppTests(test_utils.DatabaseTestCase):
@@ -17,11 +22,11 @@ def setUp(self) -> None:
         # App import must happen after TESTING environment setup
         from code_submitter.server import app
 
-        def url_for(name: str) -> str:
+        def url_for(name: str, **path_params: str) -> str:
             # While it makes for uglier tests, we do need to use more absolute
             # paths here so that the urls emitted contain the root_path from the
             # ASGI server and in turn work correctly under proxy.
-            return 'http://testserver{}'.format(app.url_path_for(name))
+            return 'http://testserver{}'.format(app.url_path_for(name, **path_params))
 
         test_client = TestClient(app)
         self.session = test_client.__enter__()
@@ -315,7 +320,13 @@ def test_create_session(self) -> None:
         )
 
     def test_no_download_link_for_non_blueshirt(self) -> None:
-        download_url = self.url_for('download_submissions')
+        session_id = self.await_(self.database.execute(
+            Session.insert().values(
+                name="Test session",
+                username='blueshirt',
+            ),
+        ))
+        download_url = self.url_for('download_submissions', session_id=session_id)
 
         response = self.session.get(self.url_for('homepage'))
 
@@ -325,20 +336,50 @@ def test_no_download_link_for_non_blueshirt(self) -> None:
     def test_shows_download_link_for_blueshirt(self) -> None:
         self.session.auth = ('blueshirt', 'blueshirt')
 
-        download_url = self.url_for('download_submissions')
+        session_id = self.await_(self.database.execute(
+            Session.insert().values(
+                name="Test session",
+                username='blueshirt',
+            ),
+        ))
+        download_url = self.url_for('download_submissions', session_id=session_id)
 
         response = self.session.get(self.url_for('homepage'))
         html = response.text
         self.assertIn(download_url, html)
 
     def test_download_submissions_requires_blueshirt(self) -> None:
-        response = self.session.get(self.url_for('download_submissions'))
+        session_id = self.await_(self.database.execute(
+            Session.insert().values(
+                name="Test session",
+                username='blueshirt',
+            ),
+        ))
+        response = self.session.get(
+            self.url_for('download_submissions', session_id=session_id),
+        )
         self.assertEqual(403, response.status_code)
 
+    def test_download_submissions_when_invalid_session(self) -> None:
+        self.session.auth = ('blueshirt', 'blueshirt')
+        response = self.session.get(
+            self.url_for('download_submissions', session_id='4'),
+        )
+        self.assertEqual(404, response.status_code)
+
     def test_download_submissions_when_none(self) -> None:
         self.session.auth = ('blueshirt', 'blueshirt')
 
-        response = self.session.get(self.url_for('download_submissions'))
+        session_id = self.await_(self.database.execute(
+            Session.insert().values(
+                name="Test session",
+                username='blueshirt',
+            ),
+        ))
+
+        response = self.session.get(
+            self.url_for('download_submissions', session_id=session_id),
+        )
         self.assertEqual(200, response.status_code)
 
         with zipfile.ZipFile(io.BytesIO(response.content)) as zf:
@@ -359,15 +400,30 @@ def test_download_submissions(self) -> None:
                 created=datetime.datetime(2020, 8, 8, 12, 0),
             ),
         ))
-        self.await_(self.database.execute(
+        choice_id = self.await_(self.database.execute(
             ChoiceHistory.insert().values(
                 archive_id=8888888888,
                 username='test_user',
                 created=datetime.datetime(2020, 9, 9, 12, 0),
             ),
         ))
 
-        response = self.session.get(self.url_for('download_submissions'))
+        session_id = self.await_(self.database.execute(
+            Session.insert().values(
+                name="Test session",
+                username='blueshirt',
+            ),
+        ))
+        self.await_(self.database.execute(
+            ChoiceForSession.insert().values(
+                choice_id=choice_id,
+                session_id=session_id,
+            ),
+        ))
+
+        response = self.session.get(
+            self.url_for('download_submissions', session_id=session_id),
+        )
         self.assertEqual(200, response.status_code)
 
         with zipfile.ZipFile(io.BytesIO(response.content)) as zf: