add generic doi version case

1 files changed, 14 insertions, 0 deletions

diff --git a/fuzzycat/utils.py b/fuzzycat/utils.py
index ef3b418..2dc2adb 100644
--- a/fuzzycat/utils.py
+++ b/fuzzycat/utils.py
@@ -3,12 +3,26 @@ import itertools
 import re
 import string
 
+from glom import glom, PathAccessError
+
 printable_no_punct = string.digits + string.ascii_letters + string.whitespace
 
 # More correct: https://www.johndcook.com/blog/2016/02/04/regular-expression-to-match-a-chemical-element/
 CHEM_FORMULA = re.compile(r"([A-Z]{1,2}[0-9]{1,2})+")
 
 
+def dict_key_exists(doc, path):
+    """
+    Return true, if a value at a given path exists. XXX: probably in glom, too.
+    """
+    try:
+        _ = glom(doc, path)
+    except PathAccessError:
+        return False
+    else:
+        return True
+
+
 def has_doi_prefix(v, prefix="10.1234"):
     """
     Returns False, if we cannot parse v or prefix does not match.