Add basic "auto-execute" logic for new batches created via filemon

this is for the sake of label batches in particular, when deploying several
copies from host to all store nodes

rattail/batch/filemon.py

@@ -31,6 +31,7 @@ import logging
 from rattail.db import Session, model
 from rattail.config import parse_bool
 from rattail.filemon import Action
+from rattail.time import make_utc
 from rattail.util import load_object
 
 
@@ -43,7 +44,9 @@ class MakeBatch(Action):
     handles the simple case of creating a batch with a single input data file.
     """
 
-    def __call__(self, path, batch_type='', handler='', user='', delete_if_empty='false', **kwargs):
+    def __call__(self, path, batch_type='', handler='', user='',
+                 delete_if_empty='false', auto_execute_allowed='true',
+                 **kwargs):
         """
         Make a batch from the given file path.
 
@@ -61,13 +64,20 @@ class MakeBatch(Action):
         :param delete_if_empty: Set this to 'true' if you wish the batch to be
            auto-deleted in the event that it has no data rows, after being
            initially populated from the given data file.
+
+        :param auto_execute_allowed: Set this to 'false' if you wish to disable
+           auto-execution of new batches.  Default behavior is for the handler
+           to decide whether each batch is eligible for auto-execution.  Note
+           that it is not possible to "force" auto-execution of a batch; you
+           may only "allow" or "prevent" it.
         """
         if not handler:
             assert batch_type
             handler = self.config.require('rattail.batch', '{}.handler'.format(batch_type))
         handler = load_object(handler)(self.config)
         session = Session()
-        kwargs['created_by'] = session.query(model.User).filter_by(username=user).one()
+        user = session.query(model.User).filter_by(username=user).one()
+        kwargs['created_by'] = user
         batch = handler.make_batch(session, **kwargs)
         handler.set_input_file(batch, path)
         handler.populate(batch)
@@ -79,6 +89,12 @@ class MakeBatch(Action):
                 log.debug("auto-deleting empty '{}' batch: {}".format(handler.batch_key, batch))
                 batch.delete_data(self.config)
                 session.delete(batch)
+                batch = None
+
+        if batch and parse_bool(auto_execute_allowed) and handler.auto_executable(batch):
+            handler.execute(batch, user=user)
+            batch.executed = make_utc()
+            batch.executed_by = user
 
         session.commit()
         session.close()

rattail/batch/handlers.py

@@ -308,6 +308,13 @@ class BatchHandler(object):
             return True
         return not bool(batch.executed)
 
+    def auto_executable(self, batch):
+        """
+        Must return a boolean indicating whether the given bath is eligible for
+        "automatic" execution, i.e. immediately after batch is created.
+        """
+        return False
+
     def execute(self, batch, progress=None, **kwargs):
         """
         Execute the given batch, with given progress and kwargs.  That is an

rattail/batch/labels.py

@@ -37,6 +37,7 @@ from rattail import enum
 from rattail.db import model, api
 from rattail.gpc import GPC
 from rattail.batch import BatchHandler
+from rattail.csvutil import UnicodeDictReader
 from rattail.util import progress_loop
 from rattail.time import make_utc
 from rattail.config import parse_bool
@@ -67,6 +68,15 @@ class LabelBatchHandler(BatchHandler):
             self.calc_check_digit = parse_bool(self.calc_check_digit)
         return super(LabelBatchHandler, self).make_batch(session, progress, **kwargs)
 
+    def auto_executable(self, batch):
+        """
+        Must return a boolean indicating whether the given bath is eligible for
+        "automatic" execution, i.e. immediately after batch is created.
+        """
+        if batch.filename and '.autoexecute.' in batch.filename:
+            return True
+        return False
+
     def populate(self, batch, progress=None):
         """
         Pre-fill batch with row data from handheld batch, etc.
@@ -117,14 +127,17 @@ class LabelBatchHandler(BatchHandler):
         with open(path, 'rb') as f:
             if self.skip_first_line:
                 f.readline()
-            reader = csv.reader(f)
-            data = list(reader)
+                reader = csv.reader(f)
+                data = [{'upc': row[0]} for row in reader]
+            else:
+                reader = UnicodeDictReader(f)
+                data = list(reader)
 
         products = []
         session = orm.object_session(batch)
 
         def append(entry, i):
-            upc = entry[0].strip()
+            upc = entry['upc'].strip()
             if upc:
                 upc = GPC(upc, calc_check_digit=self.calc_check_digit)
                 product = api.get_product_by_upc(session, upc)
@@ -133,9 +146,9 @@ class LabelBatchHandler(BatchHandler):
                 else:
                     log.warning("product not found: {}".format(upc))
 
-        if self.progress_loop(append, data, progress,
-                              message="Reading data from CSV file"):
-            return products
+        self.progress_loop(append, data, progress,
+                           message="Reading data from CSV file")
+        return products
 
     def get_label_profile(self, session):
         code = self.config.get('rattail.batch', 'labels.default_code')