WIP Split even more and start implementing the other direction

Lib/glyphsLib/builder/blue_values.py

@@ -16,9 +16,10 @@
                         unicode_literals)
 
 
-def set_blue_values(ufo, alignment_zones):
+def to_ufo_blue_values(_context, ufo, master):
     """Set postscript blue values from Glyphs alignment zones."""
 
+    alignment_zones = master.alignmentZones
     blue_values = []
     other_blues = []
     for zone in sorted(alignment_zones):
@@ -29,3 +30,7 @@ def set_blue_values(ufo, alignment_zones):
 
     ufo.info.postscriptBlueValues = blue_values
     ufo.info.postscriptOtherBlues = other_blues
+
+
+def to_glyphs_blue_values(context, ufo, master):
+    pass

Lib/glyphsLib/builder/common.py

@@ -14,8 +14,16 @@
 
 from __future__ import (print_function, division, absolute_import,
                         unicode_literals)
+import datetime
+
+UFO_FORMAT = '%Y/%m/%d %H:%M:%S'
 
 
 def to_ufo_time(datetime_obj):
     """Format a datetime object as specified for UFOs."""
-    return datetime_obj.strftime('%Y/%m/%d %H:%M:%S')
+    return datetime_obj.strftime(UFO_FORMAT)
+
+
+def from_ufo_time(string):
+    """Parses a datetime as specified for UFOs into a datetime object."""
+    return datetime.strptime(string, UFO_FORMAT)

Lib/glyphsLib/builder/constants.py

@@ -75,3 +75,5 @@
     850: 62,
     437: 63,
 }
+
+REVERSE_CODEPAGE_RANGES = {value: key for key, value in CODEPAGE_RANGES}