moviewyrm/bookwyrm/views/reading.py

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""" the good stuff! the books! """
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from django.contrib.auth.decorators import login_required
from django.core.cache import cache
from django.core.cache.utils import make_template_fragment_key
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from django.db import transaction
from django.http import HttpResponse, HttpResponseBadRequest, HttpResponseNotFound
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from django.shortcuts import get_object_or_404, redirect
from django.template.response import TemplateResponse
from django.utils.decorators import method_decorator
from django.views import View
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from django.views.decorators.http import require_POST
from bookwyrm import models
from bookwyrm.views.shelf.shelf_actions import unshelve
from .status import CreateStatus
from .helpers import get_edition, handle_reading_status, is_api_request
from .helpers import load_date_in_user_tz_as_utc
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@method_decorator(login_required, name="dispatch")
# pylint: disable=no-self-use
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# pylint: disable=too-many-return-statements
class ReadingStatus(View):
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"""consider reading a book"""
def get(self, request, status, book_id):
"""modal page"""
book = get_edition(book_id)
template = {
"want": "want.html",
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"start": "start.html",
"finish": "finish.html",
}.get(status)
if not template:
return HttpResponseNotFound()
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# redirect if we're already on this shelf
return TemplateResponse(request, f"reading_progress/{template}", {"book": book})
def post(self, request, status, book_id):
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"""Change the state of a book by shelving it and adding reading dates"""
identifier = {
"want": models.Shelf.TO_READ,
"start": models.Shelf.READING,
"finish": models.Shelf.READ_FINISHED,
}.get(status)
if not identifier:
return HttpResponseBadRequest()
# invalidate the template cache
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cache_keys = [
make_template_fragment_key("shelve_button", [request.user.id, book_id]),
make_template_fragment_key("suggested_books", [request.user.id]),
]
cache.delete_many(cache_keys)
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desired_shelf = get_object_or_404(
models.Shelf, identifier=identifier, user=request.user
)
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book = (
models.Edition.viewer_aware_objects(request.user)
.prefetch_related("shelfbook_set__shelf")
.get(id=book_id)
)
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# gets the first shelf that indicates a reading status, or None
shelves = [
s
for s in book.current_shelves
if s.shelf.identifier in models.Shelf.READ_STATUS_IDENTIFIERS
]
current_status_shelfbook = shelves[0] if shelves else None
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# checking the referer prevents redirecting back to the modal page
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referer = request.headers.get("Referer", "/")
referer = "/" if "reading-status" in referer else referer
if current_status_shelfbook is not None:
if current_status_shelfbook.shelf.identifier != desired_shelf.identifier:
current_status_shelfbook.delete()
else: # It already was on the shelf
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return redirect(referer)
models.ShelfBook.objects.create(
book=book, shelf=desired_shelf, user=request.user
)
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update_readthrough_on_shelve(
request.user,
book,
desired_shelf.identifier,
start_date=request.POST.get("start_date"),
finish_date=request.POST.get("finish_date"),
)
# post about it (if you want)
if request.POST.get("post-status"):
# is it a comment?
if request.POST.get("content"):
return CreateStatus.as_view()(request, "comment")
privacy = request.POST.get("privacy")
handle_reading_status(request.user, desired_shelf, book, privacy)
# if the request includes a "shelf" value we are using the 'move' button
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if bool(request.POST.get("shelf")):
# unshelve the existing shelf
this_shelf = request.POST.get("shelf")
if (
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bool(current_status_shelfbook)
and int(this_shelf) != int(current_status_shelfbook.shelf.id)
and current_status_shelfbook.shelf.identifier
!= desired_shelf.identifier
):
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return unshelve(request, book_id=book_id)
if is_api_request(request):
return HttpResponse()
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return redirect(referer)
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@transaction.atomic
def update_readthrough_on_shelve(
user, annotated_book, status, start_date=None, finish_date=None
):
"""update the current readthrough for a book when it is re-shelved"""
# there *should* only be one of current active readthrough, but it's a list
active_readthrough = next(iter(annotated_book.active_readthroughs), None)
# deactivate all existing active readthroughs
for readthrough in annotated_book.active_readthroughs:
readthrough.is_active = False
readthrough.save()
# if the state is want-to-read, deactivating existing readthroughs is all we need
if status == models.Shelf.TO_READ:
return
# if we're starting a book, we need a fresh clean active readthrough
if status == models.Shelf.READING or not active_readthrough:
active_readthrough = models.ReadThrough.objects.create(
user=user, book=annotated_book
)
# santiize and set dates
active_readthrough.start_date = load_date_in_user_tz_as_utc(start_date, user)
# if the finish date is set, the readthrough will be automatically set as inactive
active_readthrough.finish_date = load_date_in_user_tz_as_utc(finish_date, user)
active_readthrough.save()
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@login_required
@require_POST
def delete_readthrough(request):
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"""remove a readthrough"""
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readthrough = get_object_or_404(models.ReadThrough, id=request.POST.get("id"))
readthrough.raise_not_deletable(request.user)
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readthrough.delete()
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return redirect(request.headers.get("Referer", "/"))
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@login_required
@require_POST
def create_readthrough(request):
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"""can't use the form because the dates are too finnicky"""
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book = get_object_or_404(models.Edition, id=request.POST.get("book"))
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start_date = load_date_in_user_tz_as_utc(
request.POST.get("start_date"), request.user
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)
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finish_date = load_date_in_user_tz_as_utc(
request.POST.get("finish_date"), request.user
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)
models.ReadThrough.objects.create(
user=request.user,
book=book,
start_date=start_date,
finish_date=finish_date,
)
return redirect("book", book.id)
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@login_required
@require_POST
def delete_progressupdate(request):
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"""remove a progress update"""
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update = get_object_or_404(models.ProgressUpdate, id=request.POST.get("id"))
update.raise_not_deletable(request.user)
update.delete()
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return redirect(request.headers.get("Referer", "/"))