Add support for making new label batch from CSV file

rattail/db/batch/labels/handler.py

@@ -26,13 +26,21 @@ Handler for label batches
 
 from __future__ import unicode_literals, absolute_import
 
+import csv
+import logging
+
 import sqlalchemy as sa
 
 from rattail import enum
 from rattail.db import model, api
+from rattail.gpc import GPC
 from rattail.db.batch.handler import BatchHandler
 from rattail.util import progress_loop
 from rattail.time import make_utc
+from rattail.config import parse_bool
+
+
+log = logging.getLogger(__name__)
 
 
 class LabelBatchHandler(BatchHandler):
@@ -43,30 +51,72 @@ class LabelBatchHandler(BatchHandler):
     model_title = "Label Batch"
     show_progress = True
 
-    def make_batch(self, session, products=None, progress=None, **kwargs):
+    def make_batch(self, session, filepath=None, products=None, progress=None, **kwargs):
         """
         Create a new label batch and maybe fill it, if we were given something
         good to work with.  A HandheldBatch or sequence/query of Product
         objects are supported for source data.
         """
-        batch = model.LabelBatch(**kwargs)
-        if products:
+        self.label_profile = self.get_label_profile(session)
+        assert self.label_profile
+        self.now = make_utc()
+        self.setup()
+        self.sequence = 1
+
+        if filepath:
+            kwargs['progress'] = progress
+            batch = self.make_batch_from_file(session, filepath, **kwargs)
+        elif products:
+            batch = model.LabelBatch(**kwargs)
             self.rebuild_from_products(session, batch, products, progress)
+
+        self.teardown()
+        return batch
+
+    def make_batch_from_file(self, session, path, skip_first_line=False,
+                             calc_check_digit='upc', progress=None, **kwargs):
+        """
+        Make a new batch using the given file as data source.
+        """
+        skip_first_line = parse_bool(skip_first_line)
+        if calc_check_digit != 'upc':
+            calc_check_digit = parse_bool(calc_check_digit)
+
+        batch = model.LabelBatch(**kwargs)
+        with open(path, 'rb') as f:
+            if skip_first_line:
+                f.readline()
+            reader = csv.reader(f)
+            lines = list(reader)
+
+        def convert(line, i):
+            upc = line[0].strip()
+            if not upc:
+                return
+
+            upc = GPC(upc, calc_check_digit=calc_check_digit)
+            product = api.get_product_by_upc(session, upc)
+            if not product:
+                log.warning("product not found: {}".format(upc))
+                return
+
+            row = model.LabelBatchRow(sequence=self.sequence)
+            self.sequence += 1
+            row.product = product
+            row.label_code = self.label_profile.code
+            row.label_profile = self.label_profile
+            row.label_quantity = 1
+            batch.data_rows.append(row)
+            self.cognize_row(session, row)
+
+        progress_loop(convert, lines, progress,
+                      message="Adding batch rows from file")
         return batch
 
     def rebuild_from_products(self, session, batch, products, progress=None):
         """
         Rebuild the given batch from the given products.
         """
-        self.label_profile = self.get_label_profile(session)
-        assert self.label_profile
-
-        self.setup()
-
-        del batch.data_rows[:]
-        self.sequence = 1
-        self.now = make_utc()
-
         def convert(product, i):
             row = model.LabelBatchRow(sequence=self.sequence)
             self.sequence += 1
@@ -80,8 +130,6 @@ class LabelBatchHandler(BatchHandler):
         progress_loop(convert, products, progress, count=products.count(),
                       message="Copying product rows to label batch")
 
-        self.teardown()
-
     def refresh_data(self, session, batch, progress=None):
         """
         Refresh all data for the batch.
@@ -156,7 +204,9 @@ class LabelBatchHandler(BatchHandler):
         row.pack_price = regular_price.pack_price if regular_price else None
         sale_price = product.current_price
         if sale_price:
-            if sale_price.type == enum.PRICE_TYPE_SALE and sale_price.starts <= self.now <= sale_price.ends:
+            if (sale_price.type == enum.PRICE_TYPE_SALE and
+                sale_price.starts and sale_price.starts <= self.now and
+                sale_price.ends and sale_price.ends >= self.now):
                 pass            # this is what we want
             else:
                 sale_price = None
@@ -187,6 +237,8 @@ class LabelBatchHandler(BatchHandler):
         profiles = {}
 
         def organize(row, i):
+            if row.removed:
+                return
             profile = row.label_profile
             if profile.uuid not in profiles:
                 profiles[profile.uuid] = profile