Merge branch 'master' of git.archive.org:webgroup/fuzzycat

* 'master' of git.archive.org:webgroup/fuzzycat:
  simplify README for general audience; move some content to notes
  sandcrawler slugify: lower-case greek ambiguity (OCR)
  DOI clean/normalize helper; and use in verification etc
  verify: page count parsing and comparison improvements

5 files changed, 52 insertions, 11 deletions

diff --git a/fuzzycat/cluster.py b/fuzzycat/cluster.py
index 4e70bdd..c8384c1 100644
--- a/fuzzycat/cluster.py
+++ b/fuzzycat/cluster.py
@@ -151,10 +151,20 @@ SANDCRAWLER_CHAR_MAP = {
     '\N{Latin capital letter T with stroke}': 'T',
     '\N{Latin small letter t with stroke}': 't',
 
-    # bnewbold additions
+    # bnewbold additions; mostly Latin-ish OCR ambiguous
     '\N{MICRO SIGN}': 'u',
     '\N{LATIN SMALL LETTER C}': 'c',
     '\N{LATIN SMALL LETTER F WITH HOOK}': 'f',
+    '\N{Greek Small Letter Alpha}': 'a',
+    '\N{Greek Small Letter Beta}': 'b',
+    '\N{Greek Small Letter Iota}': 'i',
+    '\N{Greek Small Letter Kappa}': 'k',
+    '\N{Greek Small Letter Chi}': 'x',
+    '\N{Greek Small Letter Upsilon}': 'u',
+    '\N{Greek Small Letter Nu}': 'v',
+    '\N{Greek Small Letter Gamma}': 'y',
+    '\N{Greek Small Letter Tau}': 't',
+    '\N{Greek Small Letter Omicron}': 'o',
     # bnewbold map-to-null (for non-printing stuff not in the regex)
     '\N{PARTIAL DIFFERENTIAL}': '',
     '\N{LATIN LETTER INVERTED GLOTTAL STOP}': '',
@@ -193,7 +203,7 @@ def sandcrawler_slugify(raw: str) -> str:
     slug = slug.replace("'", "'")
 
     # iterate over all chars and replace from map, if in map; then lower-case again
-    slug = ''.join([SANDCRAWLER_CHAR_MAP.get(c, c) for c in slug])
+    slug = ''.join([SANDCRAWLER_CHAR_MAP.get(c, c) for c in slug]).lower()
 
     # early bailout before executing regex
     if not slug:
@@ -217,6 +227,7 @@ def test_sandcrawler_slugify() -> None:
         ("علمية", "علمية"),
         ("期刊的数字", "期刊的数字"),
         ("les pré-impressions explorées à partir", "lespreimpressionsexploreesapartir"),
+        ("γ-Globulin", "yglobulin"),
 
         # "MICRO SIGN"
         ("\xb5meter", "umeter"),
diff --git a/fuzzycat/grobid_unstructured.py b/fuzzycat/grobid_unstructured.py
index 79c39d3..5462ae1 100644
--- a/fuzzycat/grobid_unstructured.py
+++ b/fuzzycat/grobid_unstructured.py
@@ -18,6 +18,7 @@ from fatcat_openapi_client import ReleaseContrib, ReleaseEntity, ReleaseExtIds
 
 from fuzzycat.config import settings
 from fuzzycat.grobid2json import biblio_info
+from fuzzycat.utils import clean_doi
 
 GROBID_API_BASE = settings.get("GROBID_API_BASE", "https://grobid.qa.fatcat.wiki")
 
@@ -89,7 +90,7 @@ def grobid_ref_to_release(ref: dict) -> ReleaseEntity:
         issue=ref.get("issue"),
         pages=ref.get("pages"),
         ext_ids=ReleaseExtIds(
-            doi=ref.get("doi"),
+            doi=clean_doi(ref.get("doi")),
             pmid=ref.get("pmid"),
             pmcid=ref.get("pmcid"),
             arxiv=ref.get("arxiv_id"),
diff --git a/fuzzycat/simple.py b/fuzzycat/simple.py
index c78ac28..8b206b1 100644
--- a/fuzzycat/simple.py
+++ b/fuzzycat/simple.py
@@ -26,6 +26,7 @@ from fuzzycat.entities import entity_to_dict
 from fuzzycat.grobid_unstructured import grobid_parse_unstructured
 from fuzzycat.matching import match_release_fuzzy
 from fuzzycat.verify import verify
+from fuzzycat.utils import clean_doi
 
 
 @dataclass
@@ -184,7 +185,7 @@ def biblio_to_release(biblio: dict) -> ReleaseEntity:
     release = ReleaseEntity(
         title=biblio.get("title"),
         ext_ids=ReleaseExtIds(
-            doi=biblio.get("doi"),
+            doi=clean_doi(biblio.get("doi")),
             pmid=biblio.get("pmid"),
             pmcid=biblio.get("pmcid"),
             arxiv=biblio.get("arxiv_id"),
diff --git a/fuzzycat/utils.py b/fuzzycat/utils.py
index d37ee32..a1c5124 100644
--- a/fuzzycat/utils.py
+++ b/fuzzycat/utils.py
@@ -6,6 +6,7 @@ import re
 import string
 import subprocess
 import tempfile
+from typing import Optional
 
 import requests
 from glom import PathAccessError, glom
@@ -35,20 +36,32 @@ def es_compat_hits_total(resp):
 
 def parse_page_string(s):
     """
-    Parse typical page strings, e.g. 150-180.
+    Parse typical page strings, e.g. 150-180 or p123.
+
+    If only a single page number is found, returns that first page and None for
+    end page and count. If two are found, and they are consistent as a range,
+    returns the start, end, and count.
+
+    Does not handle lists of page numbers, roman numerals, and several other
+    patterns.
     """
     if not s:
         raise ValueError('page parsing: empty string')
+    if s[0].lower() in ('p', 'e'):
+        s = s[1:]
     if s.isnumeric():
-        return ParsedPages(start=int(s), end=int(s), count=1)
+        return ParsedPages(start=int(s), end=None, count=None)
     page_pattern = re.compile("([0-9]{1,})-([0-9]{1,})")
     match = page_pattern.match(s)
     if not match:
         raise ValueError('cannot parse page pattern from {}'.format(s))
     start, end = match.groups()
     if len(end) == 1 and start and start[-1] < end:
-        # 261-5, odd, but happens
+        # '261-5', odd, but happens
         end = start[:-1] + end
+    elif len(end) == 2 and start and start[-2:] < end:
+        # '577-89', also happens
+        end = start[:-2] + end
     a, b = int(start), int(end)
     if a > b:
         raise ValueError('invalid page range: {}'.format(s))
@@ -68,6 +81,19 @@ def dict_key_exists(doc, path):
     else:
         return True
 
+def clean_doi(raw: Optional[str]) -> Optional[str]:
+    if not raw:
+        return None
+    raw = raw.strip().lower()
+    if raw.startswith("doi:"):
+        raw = raw[4:]
+    if not "10." in raw:
+        return None
+    if not raw.startswith("10."):
+        raw = raw[raw.find("10."):]
+    if raw[7:9] == "//":
+        raw = raw[:8] + raw[9:]
+    return raw
 
 def doi_prefix(v):
     """
diff --git a/fuzzycat/verify.py b/fuzzycat/verify.py
index 45a809e..1eeea40 100644
--- a/fuzzycat/verify.py
+++ b/fuzzycat/verify.py
@@ -92,7 +92,7 @@ from fuzzycat.data import (CONTAINER_NAME_BLACKLIST, PUBLISHER_BLACKLIST, TITLE_
 from fuzzycat.entities import entity_to_dict
 from fuzzycat.utils import (author_similarity_score, contains_chemical_formula, dict_key_exists,
                             doi_prefix, has_doi_prefix, jaccard, num_project, parse_page_string,
-                            slugify_string)
+                            slugify_string, clean_doi)
 
 Verify = collections.namedtuple("Verify", "status reason")
 
@@ -167,8 +167,8 @@ def verify(a: Dict, b: Dict, min_title_length=5) -> Tuple[str, str]:
 
     # A few items have the same DOI.
     try:
-        a_doi = glom(a, "ext_ids.doi")
-        b_doi = glom(b, "ext_ids.doi")
+        a_doi = clean_doi(glom(a, "ext_ids.doi"))
+        b_doi = clean_doi(glom(b, "ext_ids.doi"))
         if a_doi is not None and a_doi == b_doi:
             return Verify(Status.EXACT, Reason.DOI)
     except PathAccessError:
@@ -597,7 +597,9 @@ def verify(a: Dict, b: Dict, min_title_length=5) -> Tuple[str, str]:
     try:
         a_parsed_pages = parse_page_string(glom(a, "pages"))
         b_parsed_pages = parse_page_string(glom(b, "pages"))
-        if abs(a_parsed_pages.count - b_parsed_pages.count) > 5:
+        if (a_parsed_pages.count != None
+                and b_parsed_pages.count != None
+                and abs(a_parsed_pages.count - b_parsed_pages.count) > 5):
             return Verify(Status.DIFFERENT, Reason.PAGE_COUNT)
     except (ValueError, PathAccessError):
         pass