From a57de2331caa6f92242dae6197b44926801b429a Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Wed, 2 Dec 2020 11:29:29 -0800
Subject: wikidata QID normalize helper

---
 python/fatcat_tools/normal.py | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/python/fatcat_tools/normal.py b/python/fatcat_tools/normal.py
index 9ee641fa..d792979d 100644
--- a/python/fatcat_tools/normal.py
+++ b/python/fatcat_tools/normal.py
@@ -133,6 +133,28 @@ def test_clean_arxiv_id():
     assert clean_arxiv_id("0806.v1") == None
     assert clean_arxiv_id("08062878v1") == None
 
+def clean_wikidata_qid(raw):
+    if not raw:
+        return None
+    raw = raw.strip()
+    if len(raw.split()) != 1 or len(raw) < 2:
+        return None
+    if raw[0] == 'Q' and raw[1] != '0' and raw[1:].isdigit():
+        return raw
+    return None
+
+def test_clean_wikidata_qid():
+    assert clean_wikidata_qid("Q1234") == "Q1234"
+    assert clean_wikidata_qid("Q1") == "Q1"
+    assert clean_wikidata_qid(" Q1234 ") == "Q1234"
+    assert clean_wikidata_qid(" Q1 234 ") == None
+    assert clean_wikidata_qid("q1234") == None
+    assert clean_wikidata_qid("1234 ") == None
+    assert clean_wikidata_qid("Q0123") == None
+    assert clean_wikidata_qid("PMC123") == None
+    assert clean_wikidata_qid("qfba3") == None
+    assert clean_wikidata_qid("") == None
+
 def clean_pmid(raw):
     if not raw:
         return None
@@ -147,8 +169,8 @@ def test_clean_pmid():
     assert clean_pmid("1234") == "1234"
     assert clean_pmid("1234 ") == "1234"
     assert clean_pmid("PMC123") == None
-    assert clean_sha1("qfba3") == None
-    assert clean_sha1("") == None
+    assert clean_pmid("qfba3") == None
+    assert clean_pmid("") == None
 
 def clean_pmcid(raw):
     if not raw:
-- 
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