stub out antivirus in dev

antivirus is sometimes tough to get running locally - now in dev
antivirus is skipped unless `ANTIVIRUS_ENABLED=1` is set on the command
line. on all other environments it is always enabled.

app/celery/letters_pdf_tasks.py

@@ -347,11 +347,19 @@ def replay_letters_in_error(filename=None):
         move_error_pdf_to_scan_bucket(filename)
         # call task to add the filename to anti virus queue
         current_app.logger.info("Calling scan_file for: {}".format(filename))
-        notify_celery.send_task(
-            name=TaskNames.SCAN_FILE,
-            kwargs={'filename': filename},
-            queue=QueueNames.ANTIVIRUS,
-        )
+
+        if current_app.config['ANTIVIRUS_ENABLED']:
+            notify_celery.send_task(
+                name=TaskNames.SCAN_FILE,
+                kwargs={'filename': filename},
+                queue=QueueNames.ANTIVIRUS,
+            )
+        else:
+            # stub out antivirus in dev
+            process_virus_scan_passed.apply_async(
+                kwargs={'filename': filename},
+                queue=QueueNames.LETTERS,
+            )
     else:
         error_files = get_file_names_from_error_bucket()
         for item in error_files:
@@ -359,8 +367,15 @@ def replay_letters_in_error(filename=None):
             current_app.logger.info("Calling scan_file for: {}".format(moved_file_name))
             move_error_pdf_to_scan_bucket(moved_file_name)
             # call task to add the filename to anti virus queue
-            notify_celery.send_task(
-                name=TaskNames.SCAN_FILE,
-                kwargs={'filename': moved_file_name},
-                queue=QueueNames.ANTIVIRUS,
-            )
+            if current_app.config['ANTIVIRUS_ENABLED']:
+                notify_celery.send_task(
+                    name=TaskNames.SCAN_FILE,
+                    kwargs={'filename': moved_file_name},
+                    queue=QueueNames.ANTIVIRUS,
+                )
+            else:
+                # stub out antivirus in dev
+                process_virus_scan_passed.apply_async(
+                    kwargs={'filename': moved_file_name},
+                    queue=QueueNames.LETTERS,
+                )

app/config.py

@@ -108,6 +108,9 @@ class Config(object):
     CRONITOR_ENABLED = False
     CRONITOR_KEYS = json.loads(os.environ.get('CRONITOR_KEYS', '{}'))
 
+    # Antivirus
+    ANTIVIRUS_ENABLED = True
+
     ###########################
     # Default config values ###
     ###########################
@@ -354,6 +357,8 @@ class Development(Config):
     STATSD_PORT = 1000
     STATSD_PREFIX = "stats-prefix"
 
+    ANTIVIRUS_ENABLED = os.getenv('ANTIVIRUS_ENABLED') == '1'
+
     for queue in QueueNames.all_queues():
         Config.CELERY_QUEUES.append(
             Queue(queue, Exchange('default'), routing_key=queue)
@@ -381,6 +386,8 @@ class Test(Development):
 
     BROKER_URL = 'you-forgot-to-mock-celery-in-your-tests://'
 
+    ANTIVIRUS_ENABLED = True
+
     for queue in QueueNames.all_queues():
         Config.CELERY_QUEUES.append(
             Queue(queue, Exchange('default'), routing_key=queue)

app/v2/notifications/post_notifications.py

@@ -6,7 +6,7 @@ from flask import request, jsonify, current_app, abort
 from notifications_utils.recipients import try_validate_and_format_phone_number
 
 from app import api_user, authenticated_service, notify_celery, document_download_client
-from app.celery.letters_pdf_tasks import create_letters_pdf
+from app.celery.letters_pdf_tasks import create_letters_pdf, process_virus_scan_passed
 from app.celery.research_mode_tasks import create_fake_letter_response_file
 from app.clients.document_download import DocumentDownloadError
 from app.config import QueueNames, TaskNames
@@ -306,11 +306,18 @@ def process_precompiled_letter_notifications(*, letter_data, api_key, template,
     current_app.logger.info('Calling task scan-file for {}'.format(filename))
 
     # call task to add the filename to anti virus queue
-    notify_celery.send_task(
-        name=TaskNames.SCAN_FILE,
-        kwargs={'filename': filename},
-        queue=QueueNames.ANTIVIRUS,
-    )
+    if current_app.config['ANTIVIRUS_ENABLED']:
+        notify_celery.send_task(
+            name=TaskNames.SCAN_FILE,
+            kwargs={'filename': filename},
+            queue=QueueNames.ANTIVIRUS,
+        )
+    else:
+        # stub out antivirus in dev
+        process_virus_scan_passed.apply_async(
+            kwargs={'filename': filename},
+            queue=QueueNames.LETTERS,
+        )
 
     return notification