moviewyrm/bookwyrm/views/annual_summary.py

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"""end-of-year read books stats"""
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from datetime import date
from uuid import uuid4
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from django.contrib.auth.decorators import login_required
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from django.db.models import Avg, Sum, Min, Case, When
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from django.http import Http404
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from django.shortcuts import redirect
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from django.template.response import TemplateResponse
from django.views import View
from django.views.decorators.http import require_POST
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from bookwyrm import models
from .helpers import get_user_from_username
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# December day of first availability
FIRST_DAY = 15
# January day of last availability, 0 for no availability in Jan.
LAST_DAY = 15
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# pylint: disable= no-self-use
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class AnnualSummary(View):
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"""display a summary of the year for the current user"""
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def get(self, request, username, year):
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"""get response"""
user = get_user_from_username(request.user, username)
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year_key = None
if user.summary_keys and year in user.summary_keys:
year_key = user.summary_keys[year]
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privacy_verification(request, user, year, year_key)
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paginated_years = (
int(year) - 1 if is_year_available(user, int(year) - 1) else None,
int(year) + 1 if is_year_available(user, int(year) + 1) else None,
)
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# get data
read_book_ids_in_year = (
user.readthrough_set.filter(
finish_date__year__gte=year,
finish_date__year__lt=int(year) + 1,
)
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.order_by("finish_date")
.values_list("book__id", flat=True)
)
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if len(read_book_ids_in_year) == 0:
data = {
"summary_user": user,
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"year": year,
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"year_key": year_key,
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"book_total": 0,
"books": [],
"paginated_years": paginated_years,
}
return TemplateResponse(request, "annual_summary/layout.html", data)
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read_books_in_year = get_books_from_shelfbooks(read_book_ids_in_year)
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# pages stats queries
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page_stats = read_books_in_year.aggregate(Sum("pages"), Avg("pages"))
book_list_by_pages = read_books_in_year.filter(pages__gte=0).order_by("pages")
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# books with no pages
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no_page_list = len(read_books_in_year.filter(pages__exact=None))
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# rating stats queries
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ratings = (
models.Review.objects.filter(user=user)
.exclude(deleted=True)
.exclude(rating=None)
.filter(book_id__in=read_book_ids_in_year)
)
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ratings_stats = ratings.aggregate(Avg("rating"))
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data = {
"summary_user": user,
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"year": year,
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"year_key": year_key,
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"books_total": len(read_books_in_year),
"books": read_books_in_year,
"pages_total": page_stats["pages__sum"] or 0,
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"pages_average": round(
page_stats["pages__avg"] if page_stats["pages__avg"] else 0
),
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"book_pages_lowest": book_list_by_pages.first(),
"book_pages_highest": book_list_by_pages.last(),
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"no_page_number": no_page_list,
"ratings_total": len(ratings),
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"rating_average": round(
ratings_stats["rating__avg"] if ratings_stats["rating__avg"] else 0, 2
),
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"book_rating_highest": ratings.order_by("-rating").first(),
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"best_ratings_books_ids": [
review.book.id for review in ratings.filter(rating=5)
],
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"paginated_years": paginated_years,
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}
return TemplateResponse(request, "annual_summary/layout.html", data)
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@login_required
def personal_annual_summary(request, year):
"""redirect simple URL to URL with username"""
return redirect("annual-summary", request.user.localname, year)
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@login_required
@require_POST
def summary_add_key(request):
"""add summary key"""
year = request.POST["year"]
user = request.user
new_key = uuid4().hex
if not user.summary_keys:
user.summary_keys = {
year: new_key,
}
else:
user.summary_keys[year] = new_key
user.save()
response = redirect("annual-summary", user.localname, year)
response["Location"] += f"?key={str(new_key)}"
return response
@login_required
@require_POST
def summary_revoke_key(request):
"""revoke summary key"""
year = request.POST["year"]
user = request.user
if user.summary_keys and year in user.summary_keys:
user.summary_keys.pop(year)
user.save()
return redirect("annual-summary", user.localname, year)
def get_annual_summary_year():
"""return the latest available annual summary year or None"""
today = date.today()
if date(today.year, 12, FIRST_DAY) <= today <= date(today.year, 12, 31):
return today.year
if LAST_DAY > 0 and date(today.year, 1, 1) <= today <= date(
today.year, 1, LAST_DAY
):
return today.year - 1
return None
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def privacy_verification(request, user, year, year_key):
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"""raises a 404 error if the user should not access the page"""
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if user != request.user:
request_key = None
if "key" in request.GET:
request_key = request.GET["key"]
if not request_key or request_key != year_key:
raise Http404(f"The summary for {year} is unavailable")
if not is_year_available(user, year):
raise Http404(f"The summary for {year} is unavailable")
def is_year_available(user, year):
"""return boolean"""
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earliest_year = user.readthrough_set.filter(finish_date__isnull=False).aggregate(
Min("finish_date")
)["finish_date__min"]
if not earliest_year:
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return True
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earliest_year = earliest_year.year
today = date.today()
year = int(year)
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if earliest_year <= year < today.year:
return True
if year == today.year and today >= date(today.year, 12, FIRST_DAY):
return True
return False
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def get_books_from_shelfbooks(books_ids):
"""return an ordered QuerySet of books from a list"""
ordered = Case(*[When(pk=pk, then=pos) for pos, pk in enumerate(books_ids)])
books = models.Edition.objects.filter(id__in=books_ids).order_by(ordered)
return books