check isni sources when editing book authors

bookwyrm/templates/book/edit/edit_book.html

@@ -50,6 +50,24 @@
                 <input type="hidden" name="author-match-count" value="{{ author_matches|length }}">
                 <div class="column is-half">
                     {% for author in author_matches %}
+                    {% if author.isni_matches %}
+                    <fieldset>
+                        <legend class="title is-5 mb-1">
+                            {% blocktrans with name=author.name %}Is "{{ name }}" one of these?{% endblocktrans %}
+                        </legend>
+                        {% with forloop.counter0 as counter %}
+                        {% for match in author.isni_matches %}
+                        <label class="label mb-2">
+                            <input type="radio" name="author_match-{{ counter }}" value="{{ match.id }}" required>
+                            {{ match.name }}
+                            <span class="help">
+                                <a href="{{ match.uri }}" target="_blank"><em>{{ match.description }}</em></a>
+                            </span>
+                          </label>
+                        {% endfor %}
+                        {% endwith %}
+                    </fieldset>
+                    {% endif %}
                     <fieldset>
                         <legend class="title is-5 mb-1">
                             {% blocktrans with name=author.name %}Is "{{ name }}" an existing author?{% endblocktrans %}

bookwyrm/views/books/edit_book.py

@@ -13,7 +13,7 @@ from django.views import View
 from bookwyrm import book_search, forms, models
 from bookwyrm.views.helpers import get_edition
 from .books import set_cover_from_url
-
+from bookwyrm.utils.isni import find_authors_by_name
 
 # pylint: disable=no-self-use
 @method_decorator(login_required, name="dispatch")
@@ -48,6 +48,7 @@ class EditBook(View):
         if add_author:
             data["add_author"] = add_author
             data["author_matches"] = []
+            data["isni_matches"] = []
             for author in add_author.split(","):
                 if not author:
                     continue
@@ -65,6 +66,9 @@ class EditBook(View):
                             .filter(rank__gt=0.4)
                             .order_by("-rank")[:5]
                         ),
+                        "isni_matches": find_authors_by_name(
+                            author
+                        ),  # find matches from ISNI API
                     }
                 )