def get_book_details(isbn_no):
try:
isbn_no = isbn.clean_isbn(isbn_no)
lookup_url = "https://www.googleapis.com/books/v1/volumes?"
opts = {'q':'isbn:%s'%isbn_no}
if hasattr(settings, "GOOGLE_API_KEY"):
opts['key'] = settings.GOOGLE_API_KEY
google_resp = urllib2.urlopen(lookup_url + urlencode(opts))
results = json.loads(google_resp.read())
google_resp.close()
if int(results['totalItems']) > 0:
info = {}
# Choose the first item, regardless of anything else
item = results['items'][0]
vol = item['volumeInfo']
info['title'] = vol.get('title')
authors = vol.get('authors')
if len(authors) > 1:
info['author'] = "%s and %s"%(", ".join(authors[:-1]),
authors[-1])
else:
info['author'] = authors[0]
info['copyrightYear'] = vol.get('publishedDate').split("-")[0]
info['publisher'] = vol.get('publisher')
return info
except Exception:
return None
def sell_new(request, isbn_no):
# If an exception is raised at this stage
# it's not our responsibility to be nice. No well meaning
# user will see an error page at this stage
isbn_no = isbn.clean_isbn(isbn_no)
if request.method == 'POST':
book_form = SellNewBookForm(request.POST, prefix="book")
copy_form = SellExistingBookForm(request.POST, prefix="copy")
if book_form.is_valid() and copy_form.is_valid():
book = book_form.save(commit=False)
book.isbn = isbn_no
book.save()
copy = copy_form.save(commit=False)
copy.book = book
copy.owner = request.user
copy.pubDate = datetime.now()
copy.save()
messages.success(request, "Your copy of `%s` is now on sale."%\
book.title)
return redirect('bookswap.views.book_details', book.id)
else:
info = utils.get_book_details(isbn_no)
book_form = SellNewBookForm(prefix="book", initial=info)
copy_form = SellExistingBookForm(prefix="copy")
return render(request, "bookswap/sell_new.html",
{'book_form':book_form, 'copy_form':copy_form,
'isbn_no':isbn_no})
def search_books(request):
if request.method == "POST":
if request.POST.get('action') == 'isbn_search':
try:
isbn_no = isbn.clean_isbn(request.POST.get("isbn","0"))
return redirect(book_by_isbn, isbn_no=isbn_no)
except ValueError:
messages.error(request, "Please enter a valid ISBN number")
return render(request, "bookswap/home.html",
{'search_isbn':request.POST.get('isbn','')})
title = request.GET.get('title', '')
author = request.GET.get('author', '')
if title or author:
books = Book.objects.filter(
copy__soldTime=None,
title__icontains=title,
author__icontains=author)\
.annotate(
num_copies=Count('copy', distinct=True),
num_sub=Count('subscribers', distinct=True))\
.order_by('-num_copies', '-num_sub')
results = utils.PaginatorN(books, request)
return render(request, "bookswap/results.html",
{"results":results.page_auto(), 'search_title':title,
'search_author':author})
else:
return redirect(all_books)
def book_by_isbn(request, isbn_no):
try:
isbn_no = isbn.clean_isbn(isbn_no)
books = Book.objects.filter(isbn=isbn_no)
results = [(b, len(b.copy_set.all().filter(soldTime=None))) for b in books]
results.sort(reverse=True, key=lambda x:x[1])
except ValueError:
results = []
return render(request, "bookswap/book_isbn.html",
{"results":results, 'search_isbn':isbn_no})
def sell_step_search(request):
"""This step helps identify the book the user is trying to sell"""
if request.method == "POST":
isbn_no = request.POST.get('isbn', '')
try:
isbn_no = isbn.clean_isbn(isbn_no)
books = Book.objects.filter(isbn=isbn_no)
results = [(b, b.copy_set.filter(soldTime=None).count()) \
for b in books]
if results:
results.sort(reverse=True, key=lambda x:x[1])
return render(request,
"bookswap/sell_select_book.html",
{'results':results, 'isbn_no':isbn_no})
else:
return redirect('bookswap.views.sell_new', isbn_no)
except ValueError:
messages.error(request, "Invalid ISBN code")
return render(request, "bookswap/sell_search.html")
def search_books(request):
if request.method == "POST":
if request.POST.get('action') == 'isbn_search':
try:
isbn_no = isbn.clean_isbn(request.POST.get("isbn","0"))
return redirect(book_by_isbn, isbn_no=isbn_no)
except ValueError:
messages.error(request, "Please enter a valid ISBN number")
title = request.GET.get('title', '')
author = request.GET.get('author', '')
if title or author:
books = Book.objects.filter( title__contains=title,
author__contains=author)
results = [(b, len(b.copy_set.filter(soldTime=None))) for b in books]
results.sort(reverse=True, key=lambda x:x[1])
return render(request, "bookswap/results.html",
{"results":results})
else:
return render(request, 'bookswap/search.html')
def subscribe_to_new(request, isbn_no):
try:
isbn_no = isbn.clean_isbn(isbn_no)
if request.method == "POST":
if request.POST.get('verify_book') == 'on':
if "isbn_%s"%isbn_no in request.session:
info = request.session["isbn_%s"%isbn_no]
book = Book(isbn=isbn_no, title=info['title'],
author=info['author'],
copyrightYear=info['copyrightYear'],
publisher=info['publisher'],
thumbnail_url=info['thumbnail_url'])
book.save()
book.subscribers.add(request.user)
messages.success(request, ("You've been subscribed "+\
"to %s by %s. You will be notified when a " +\
"copy of this book is available.")%(book.title,
book.author))
return redirect(book_details, book_id=book.id)
else:
messages.error(request, "Sorry, there was an error " +\
"reading data. Please try again or inform "+\
"us about this problem.")
else:
messages.error(request, "Please verify that this is the book"+\
" you are looking for.")
info = utils.get_book_details(isbn_no)
request.session['isbn_%s'%isbn_no] = info
if info and info['title']:
return render(request, "bookswap/subscribe_new.html",
{'info':info, 'isbn_no':isbn_no})
else:
messages.info(request, "Sorry. We tried to find more "+\
"information about the book you requested, but were" +\
" not able to find any. If you " +\
"would like to be notified when this book is available" +\
" please inform us using the contact page above. " +\
"Please include all relevant book details, such as "+\
"ISBN number, title and author.")
return redirect("home")
except ValueError:
messages.error(request, "Invalid ISBN number")
return redirect('home')
def sell_step_search(request):
"""This step helps identify the book the user is trying to sell"""
if request.method == "POST":
isbn_no = request.POST.get('isbn', '')
try:
isbn_no = isbn.clean_isbn(isbn_no)
books = Book.objects.filter(copy__soldTime=None, isbn=isbn_no)\
.annotate(
num_copies=Count('copy', distinct=True),
num_sub=Count('subscribers', distinct=True))\
.order_by('-num_copies', '-num_sub')
if books:
return render(request,
"bookswap/sell_select_book.html",
{'results':books, 'isbn_no':isbn_no})
else:
return redirect('bookswap.views.sell_new', isbn_no)
except ValueError:
messages.error(request, "Invalid ISBN code")
return render(request, "bookswap/sell_search.html")
def book_by_isbn(request, isbn_no):
try:
isbn_no = isbn.clean_isbn(isbn_no)
books = Book.objects.filter(isbn=isbn_no)\
.annotate(
num_copies=Count('copy', distinct=True),
num_sub=Count('subscribers', distinct=True))\
.order_by('-num_copies', '-num_sub')
except ValueError:
books = []
if not books:
messages.info(request, "The book you were looking for is currently " +\
"not on sale. We're now looking for more information so that you"+\
" can sign up to be notified when this book becomes available. "+\
"Other users will be able to see the number of subscribers for"+\
" each book, helping them decide which books "+\
"to sell.")
return redirect(subscribe_to_new, isbn_no)
results = utils.PaginatorN(books, request)
return render(request, "bookswap/book_isbn.html",
{"results":results.page_auto(), 'search_isbn':isbn_no})
def clean_isbn(self):
try:
return isbn.clean_isbn(self.cleaned_data['isbn'])
except ValueError:
raise forms.ValidationError('Invalid ISBN')
