add generic barcode methods to bureau

screenless/bureau/bureau.py

@@ -1,6 +1,7 @@
 # bureau
 import functools
 import inspect
+import io
 import json
 import logging
 import os.path
@@ -12,6 +13,7 @@ import textwrap
 #import traceback
 import threading
 
+import barcode
 import lmdb
 import PIL
 import weasyprint
@@ -219,6 +221,26 @@ class Bureau(object):
         db = KeyValStore(self.dbenv, name)
         return db
 
+    def bc_svg(self, code, tofile=False, outfile=None):
+        """
+        generate a CODE128 barcode as an SVG 
+        returns a string or can write to a tmp file or specific
+        file given arguments
+        """
+        fp = io.BytesIO()
+        barcode.generate("CODE128", code, writer=barcode.writer.SVGWriter(), output=fp)
+        # TODO: add file output
+        return fp.read().decode()
+
+    def bc_png(self, code, outfile=None):
+        """
+        generate a code128 barcode as a png
+        returns the full path to the file
+        if file is not specified, uses a tmp file
+        """
+        # TODO: implement this (its like 5 lines!)
+        raise NotImplemented("png generation not implemented!")
+
     def load_config(self):
         """
         load (or reload) config data from file