Job pro stahování řešení

Dostává množinu papírů, které má zazipovat.

mo/jobs/submit.py

 # Implementace jobů pracujících se submity
 
-from mo.util import logger
+import os
+from sqlalchemy.orm import joinedload
+from tempfile import NamedTemporaryFile
+from typing import List
+import unicodedata
+import werkzeug.utils
+import zipfile
+
+from mo.util import logger, data_dir
 import mo.db as db
 from mo.jobs import TheJob, job_handler
 
 
+def schedule_download_submits(paper_ids: List[int], description: str, for_user: db.User):
+    tj = TheJob()
+    job = tj.create(db.JobType.download_submits, for_user)
+    job.description = description
+    job.in_json = {'papers': paper_ids}
+    tj.submit()
+
+
 @job_handler(db.JobType.download_submits)
 def handle_download_submits(tj: TheJob):
-    logger.debug('Entering download_submits')
-    pass
+    """Zazipuje zadané papíry.
+
+    Vstupní JSON:
+        { 'papers': [ seznam paper_id ke stažení ] }
+
+    Výstupní JSON:
+        null
+    """
+
+    job = tj.job
+    assert job.in_json is not None
+    # FIXME: Typování JSONu...
+    ids = job.in_json['papers']
+
+    sess = db.get_session()
+    papers = (sess.query(db.Paper)
+              .filter(db.Paper.paper_id.in_(ids))
+              .options(joinedload(db.Paper.for_user_obj),
+                       joinedload(db.Paper.task))
+              .all())
+
+    temp_file = NamedTemporaryFile(suffix='.zip', dir=data_dir('tmp'), mode='w+b')
+    logger.debug('Job: Vytvářím archiv %s', temp_file.name)
+    # FIXME: Setřídit soubory
+
+    cnt = 0
+    with zipfile.ZipFile(temp_file, mode='w') as zip:
+        for p in papers:
+            cnt += 1
+            full_name = p.for_user_obj.full_name()
+            ascii_name = (unicodedata.normalize('NFD', full_name)
+                          .encode('ascii', 'ignore')
+                          .decode('utf-8'))
+            fn = f'{p.task.code}_{cnt:04d}_{p.for_user}_{p.paper_id}_{ascii_name}.pdf'
+            fn = werkzeug.utils.secure_filename(fn)
+            logger.debug('Job: Přidávám %s', fn)
+            zip.write(filename=os.path.join(data_dir('submits'), p.file_name),
+                      arcname=fn)
+
+    job.out_file = tj.attach_file(temp_file.name, '.zip')
+    temp_file.close()
 
 
 @job_handler(db.JobType.upload_feedback)
 def handle_upload_feedback(tj: TheJob):
-    logger.debug('Entering upload_feedback')
-    pass
+    raise NotImplementedError()