convert between ibsn 10 and 13

bookwyrm/connectors/bookwyrm_connector.py

@@ -52,11 +52,13 @@ class Connector(AbstractConnector):
 
 
     def get_edition_from_work_data(self, data):
-        return data['editions'][0]
+        ''' we're served a list of edition urls '''
+        path = data['editions'][0]
+        return get_data(path)
 
 
     def get_work_from_edition_date(self, data):
-        return data['work']
+        return get_data(data['work'])
 
 
     def get_authors_from_data(self, data):

bookwyrm/models/book.py

@@ -135,7 +135,7 @@ class Work(Book):
     @property
     def editions_path(self):
         ''' it'd be nice to serialize the edition instead but, recursion '''
-        return self.remote_id + '/editions'
+        return [e.remote_id for e in self.edition_set.all()]
 
 
     @property
@@ -174,6 +174,49 @@ class Edition(Book):
 
     activity_serializer = activitypub.Edition
 
+    def save(self, *args, **kwargs):
+        ''' calculate isbn 10/13 '''
+        if self.isbn_13 and self.isbn_13[:3] == '978' and not self.isbn_10:
+            self.isbn_10 = isbn_13_to_10(self.isbn_13)
+        if self.isbn_10 and not self.isbn_13:
+            self.isbn_13 = isbn_10_to_13(self.isbn_10)
+
+        super().save(*args, **kwargs)
+
+
+def isbn_10_to_13(isbn_10):
+    ''' convert an isbn 10 into an isbn 13 '''
+    # drop the last character of the isbn 10 number (the original checkdigit)
+    converted = isbn_10[:9]
+    # add "978" to the front
+    converted = '978' + converted
+    # add a check digit to the end
+    # multiply the odd digits by 1 and the even digits by 3 and sum them
+    checksum = sum(int(i) for i in converted[::2]) + \
+               sum(int(i) * 3 for i in converted[1::2])
+    # add the checksum mod 10 to the end
+    checkdigit = checksum % 10
+    if checkdigit != 0:
+        checkdigit = 10 - checkdigit
+    return converted + str(checkdigit)
+
+
+def isbn_13_to_10(isbn_13):
+    ''' convert isbn 13 to 10, if possible '''
+    if isbn_13[:3] != '978':
+        return None
+
+    # remove '978' and old checkdigit
+    converted = isbn_13[3:-1]
+    # calculate checkdigit
+    # multiple each digit by 10,9,8.. successively and sum them
+    checksum = sum(int(d) * (10 - idx)  for (idx, d) in enumerate(converted))
+    checkdigit = checksum % 11
+    checkdigit = 11 - checkdigit
+    if checkdigit == 10:
+        checkdigit = 'X'
+    return converted + str(checkdigit)
+
 
 class Author(ActivitypubMixin, BookWyrmModel):
     ''' copy of an author from OL '''

bookwyrm/models/import_job.py

@@ -80,7 +80,10 @@ class ImportItem(models.Model):
         )
         search_result = books_manager.first_search_result(search_term)
         if search_result:
-            return books_manager.get_or_create_book(search_result.key)
+            try:
+                return books_manager.get_or_create_book(search_result.key)
+            except ConnectorException:
+                pass
 
     @property
     def isbn(self):

bookwyrm/templates/book.html

@@ -55,6 +55,14 @@
                 {% endif %}
             </div>
 
+            {% for readthrough in readthroughs %}
+            <div class="block">
+                {{ readthrough.start_date }}
+                {{ readthrough.finish_date }}
+                {{ readthrough.pages_read }}
+            </div>
+            {% endfor %}
+
             {% if request.user.is_authenticated %}
             <div class="block">
                 {% include 'snippets/create_status.html' with book=book hide_cover=True %}

bookwyrm/tests/connectors/test_fedireads_connector.py

@@ -34,16 +34,6 @@ class BookWyrmConnector(TestCase):
         self.assertEqual(self.connector.is_work_data(self.edition_data), False)
 
 
-    def test_get_edition_from_work_data(self):
-        edition = self.connector.get_edition_from_work_data(self.work_data)
-        self.assertEqual(edition['url'], 'https://example.com/book/122')
-
-
-    def test_get_work_from_edition_data(self):
-        work = self.connector.get_work_from_edition_date(self.edition_data)
-        self.assertEqual(work['url'], 'https://example.com/book/121')
-
-
     def test_format_search_result(self):
         datafile = pathlib.Path(__file__).parent.joinpath('../data/fr_search.json')
         search_data = json.loads(datafile.read_bytes())

bookwyrm/tests/models/test_book_model.py

@@ -2,6 +2,7 @@
 from django.test import TestCase
 
 from bookwyrm import models, settings
+from bookwyrm.models.book import isbn_10_to_13, isbn_13_to_10
 
 
 class Book(TestCase):
@@ -48,6 +49,16 @@ class Book(TestCase):
 
         self.assertEqual(self.work.default_edition, self.second_edition)
 
+    def test_isbn_10_to_13(self):
+        isbn_10 = '178816167X'
+        isbn_13 = isbn_10_to_13(isbn_10)
+        self.assertEqual(isbn_13, '9781788161671')
+
+    def test_isbn_13_to_10(self):
+        isbn_13 = '9781788161671'
+        isbn_10 = isbn_13_to_10(isbn_13)
+        self.assertEqual(isbn_10, '178816167X')
+
 
 class Shelf(TestCase):
     def setUp(self):

bookwyrm/views.py

@@ -112,26 +112,34 @@ def home_tab(request, tab):
 def get_activity_feed(user, filter_level, model=models.Status):
     ''' get a filtered queryset of statuses '''
     # status updates for your follow network
-    following = models.User.objects.filter(
-        Q(followers=user) | Q(id=user.id)
-    )
+    if user.is_anonymous:
+        user = None
+    if user:
+        following = models.User.objects.filter(
+            Q(followers=user) | Q(id=user.id)
+        )
+    else:
+        following = []
 
     activities = model
     if hasattr(model, 'objects'):
-        activities = model.objects.filter(deleted=False)
+        activities = model.objects
 
-    activities = activities.order_by(
-        '-created_date'
+    activities = activities.filter(
+        deleted=False
+    ).order_by(
+        '-published_date'
     )
+
     if hasattr(activities, 'select_subclasses'):
         activities = activities.select_subclasses()
 
-    # TODO: privacy relationshup between request.user and user
     if filter_level in ['friends', 'home']:
         # people you follow and direct mentions
         activities = activities.filter(
-            Q(user__in=following, privacy__in=['public', 'unlisted', 'followers']) | \
-                Q(mention_users=user) | Q(user=user)
+            Q(user__in=following, privacy__in=[
+                'public', 'unlisted', 'followers'
+            ]) | Q(mention_users=user) | Q(user=user)
         )
     elif filter_level == 'self':
         activities = activities.filter(user=user, privacy='public')
@@ -470,14 +478,21 @@ def book_page(request, book_id):
 
     reviews = models.Review.objects.filter(
         book__in=work.edition_set.all(),
-    ).order_by('-published_date')
+    )
+    reviews = get_activity_feed(request.user, 'federated', model=reviews)
 
     user_tags = []
+    readthroughs = []
     if request.user.is_authenticated:
         user_tags = models.Tag.objects.filter(
             book=book, user=request.user
         ).values_list('identifier', flat=True)
 
+        readthroughs = models.ReadThrough.objects.filter(
+            user=request.user
+        ).order_by('start_date')
+
+
     rating = reviews.aggregate(Avg('rating'))
     tags = models.Tag.objects.filter(
         book=book
@@ -492,6 +507,7 @@ def book_page(request, book_id):
         'rating': rating['rating__avg'],
         'tags': tags,
         'user_tags': user_tags,
+        'readthroughs': readthroughs,
         'review_form': forms.ReviewForm(),
         'quotation_form': forms.QuotationForm(),
         'comment_form': forms.CommentForm(),