hide isni authors if isni in local db

Check the authors suggested from the local DB for a matching ISNI when pulling authors from ISNI.
i.e. we do not want to suggest the same author twice when we *know* it is the same author.

bookwyrm/utils/isni.py

@@ -1,16 +1,17 @@
 """ISNI author checking utilities"""
 import xml.etree.ElementTree as ET
 import requests
-
 from bookwyrm.settings import BASE_DIR
 
+
 def url_stringify(string):
     """replace spaces for url encoding"""
 
     # TODO: this is very lazy and incomplete
     return string.replace(" ", "+")
 
-def request_isni_data(search_index, search_term, maxRecords=10):
+
+def request_isni_data(search_index, search_term, maxRecords=5):
     """Request data from the ISNI API"""
 
     search_string = url_stringify(search_term)
@@ -22,8 +23,8 @@ def request_isni_data(search_index, search_term, maxRecords=10):
         "%22&version=1.1&operation=searchRetrieve&recordSchema=isni-b",
         "&maximumRecords=",
         str(maxRecords),
-        "&startRecord=1&recordPacking=xml&sortKeys=RLV%2Cpica%2C0%2C%2C"
-        ]
+        "&startRecord=1&recordPacking=xml&sortKeys=RLV%2Cpica%2C0%2C%2C",
+    ]
     query_url = "".join(query_parts)
     result = requests.get(query_url)
     # the OCLC ISNI server asserts the payload is encoded
@@ -31,6 +32,7 @@ def request_isni_data(search_index, search_term, maxRecords=10):
     result.encoding = "utf-8"
     return result.text
 
+
 def make_name_string(element):
     """create a string of form 'personal_name surname'"""
 
@@ -39,9 +41,10 @@ def make_name_string(element):
     forename = element.find(".//forename")
     surname = element.find(".//surname")
     if forename is not None:
-        return "".join([forename.text," ",surname.text])
+        return "".join([forename.text, " ", surname.text])
     return surname.text
 
+
 def get_other_identifier(element, code):
     """Get other identifiers associated with an author from their ISNI record"""
 
@@ -55,19 +58,18 @@ def get_other_identifier(element, code):
             return section_head.find(".//identifier").text
     return
 
+
 def get_external_information_uri(element, match_string):
     """Get URLs associated with an author from their ISNI record"""
 
     sources = element.findall(".//externalInformation")
     for source in sources:
         uri = source.find(".//URI")
-        if (
-            uri is not None
-            and uri.text.find(match_string) is not None
-            ):
-                return uri.text
+        if uri is not None and uri.text.find(match_string) is not None:
+            return uri.text
     return
 
+
 def find_authors_by_name(name_string):
     """Query the ISNI database for possible author matches by name"""
 
@@ -94,6 +96,7 @@ def find_authors_by_name(name_string):
 
     return possible_authors
 
+
 def get_author_isni_data(isni):
 
     payload = request_isni_data("pica.isn", isni)
@@ -110,9 +113,9 @@ def get_author_isni_data(isni):
     author["viaf_id"] = get_other_identifier(element, "viaf")
     author["wikipedia_link"] = get_external_information_uri(element, "Wikipedia")
     author["bio"] = bio.text if bio is not None else ""
-    author["aliases"] = [] # CHECK can we send a list for this?
+    author["aliases"] = []
     aliases = element.findall(".//personalNameVariant")
     for entry in aliases:
-        author["aliases"].append( make_name_string(entry) )
+        author["aliases"].append(make_name_string(entry))
 
     return author

bookwyrm/views/books/edit_book.py

@@ -57,22 +57,32 @@ class EditBook(View):
                     "aliases", weight="B"
                 )
 
+                author_matches = (
+                    models.Author.objects.annotate(search=vector)
+                    .annotate(rank=SearchRank(vector, author))
+                    .filter(rank__gt=0.4)
+                    .order_by("-rank")[:5]
+                )
+
+                isni_authors = find_authors_by_name(
+                    author
+                )  # find matches from ISNI API
+
+                # do not show isni results for authors we already have in the DB
+                exists = [
+                    i
+                    for i in isni_authors
+                    for a in author_matches
+                    if i["isni"] == a.isni
+                ]
+                isni_matches = list(filter(lambda x: x not in exists, isni_authors))
                 data["author_matches"].append(
                     {
                         "name": author.strip(),
-                        "matches": (
-                            models.Author.objects.annotate(search=vector)
-                            .annotate(rank=SearchRank(vector, author))
-                            .filter(rank__gt=0.4)
-                            .order_by("-rank")[:5]
-                        ),
-                        "isni_matches": find_authors_by_name(
-                            author
-                        ),  # find matches from ISNI API
+                        "matches": author_matches,
+                        "isni_matches": isni_matches,
                     }
                 )
-                # TODO: check if an isni record matches an existing record
-                # to bring these two records together
 
         # we're creating a new book
         if not book:
@@ -157,7 +167,8 @@ class ConfirmEditBook(View):
                     # otherwise it's a name with or without isni id
                     isni = request.POST.get(f"isni_match-{i}")
                     author_data = (
-                        get_author_isni_data(isni) if isni is not None 
+                        get_author_isni_data(isni)
+                        if isni is not None
                         else {"name": match}
                     )
                     author = models.Author.objects.create(**author_data)