Updates migrations

To get the app working again I ran resetdb, let it crash in initdb,
then ran the migration, then re-ran initdb

bookwyrm/connectors/bookwyrm_connector.py

@@ -0,0 +1,108 @@
+''' using another bookwyrm instance as a source of book data '''
+from uuid import uuid4
+
+from django.core.exceptions import ObjectDoesNotExist
+from django.core.files.base import ContentFile
+import requests
+
+from bookwyrm import models
+from .abstract_connector import AbstractConnector, SearchResult, Mapping
+from .abstract_connector import update_from_mappings, get_date, get_data
+
+
+class Connector(AbstractConnector):
+    ''' interact with other instances '''
+    def __init__(self, identifier):
+        super().__init__(identifier)
+        self.key_mappings = [
+            Mapping('isbn_13', model=models.Edition),
+            Mapping('isbn_10', model=models.Edition),
+            Mapping('lccn', model=models.Work),
+            Mapping('oclc_number', model=models.Edition),
+            Mapping('openlibrary_key'),
+            Mapping('goodreads_key'),
+            Mapping('asin'),
+        ]
+
+        self.book_mappings = self.key_mappings + [
+            Mapping('sort_title'),
+            Mapping('subtitle'),
+            Mapping('description'),
+            Mapping('languages'),
+            Mapping('series'),
+            Mapping('series_number'),
+            Mapping('subjects'),
+            Mapping('subject_places'),
+            Mapping('first_published_date'),
+            Mapping('published_date'),
+            Mapping('pages'),
+            Mapping('physical_format'),
+            Mapping('publishers'),
+        ]
+
+        self.author_mappings = [
+            Mapping('born', remote_field='birth_date', formatter=get_date),
+            Mapping('died', remote_field='death_date', formatter=get_date),
+            Mapping('bio'),
+        ]
+
+
+    def is_work_data(self, data):
+        return data['book_type'] == 'Work'
+
+
+    def get_edition_from_work_data(self, data):
+        return data['editions'][0]
+
+
+    def get_work_from_edition_date(self, data):
+        return data['work']
+
+
+    def get_authors_from_data(self, data):
+        for author_url in data.get('authors', []):
+            yield self.get_or_create_author(author_url)
+
+
+    def get_cover_from_data(self, data):
+        cover_data = data.get('attachment')
+        if not cover_data:
+            return None
+        cover_url = cover_data[0].get('url')
+        response = requests.get(cover_url)
+        if not response.ok:
+            response.raise_for_status()
+
+        image_name = str(uuid4()) + cover_url.split('.')[-1]
+        image_content = ContentFile(response.content)
+        return [image_name, image_content]
+
+
+    def get_or_create_author(self, remote_id):
+        ''' load that author '''
+        try:
+            return models.Author.objects.get(remote_id=remote_id)
+        except ObjectDoesNotExist:
+            pass
+
+        data = get_data(remote_id)
+
+        # ingest a new author
+        author = models.Author(remote_id=remote_id)
+        author = update_from_mappings(author, data, self.author_mappings)
+        author.save()
+
+        return author
+
+
+    def parse_search_data(self, data):
+        return data
+
+
+    def format_search_result(self, search_result):
+        return SearchResult(**search_result)
+
+
+    def expand_book_data(self, book):
+        # TODO
+        pass