428 lines
16 KiB
Python
428 lines
16 KiB
Python
import operator
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import logging
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from difflib import SequenceMatcher
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from urllib.parse import urlparse
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from django.shortcuts import render, redirect, reverse
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from django.contrib.auth.decorators import login_required
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from django.utils.translation import gettext_lazy as _
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from django.core.paginator import Paginator
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from django.core.validators import URLValidator
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from django.core.exceptions import ValidationError, ObjectDoesNotExist
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from django.db.models import Q, Count
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from django.http import HttpResponseBadRequest
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from books.models import Book
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from movies.models import Movie
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from games.models import Game
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from music.models import Album, Song, AlbumMark, SongMark
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from users.models import Report, User, Preference
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from mastodon.decorators import mastodon_request_included
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from users.views import home as user_home
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from timeline.views import timeline as user_timeline
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from common.models import MarkStatusEnum
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from common.utils import PageLinksGenerator
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from common.scraper import get_scraper_by_url, get_normalized_url
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from common.config import *
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from common.searcher import ExternalSources
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from management.models import Announcement
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from django.conf import settings
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from common.index import Indexer
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from django.http import JsonResponse
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logger = logging.getLogger(__name__)
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@login_required
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def home(request):
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if request.user.get_preference().classic_homepage:
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return redirect(reverse("users:home", args=[request.user.mastodon_username]))
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else:
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return redirect(reverse("timeline:timeline"))
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@login_required
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def external_search(request):
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category = request.GET.get("c", default='all').strip().lower()
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if category == 'all':
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category = None
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keywords = request.GET.get("q", default='').strip()
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page_number = int(request.GET.get('page', default=1))
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return render(
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request,
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"common/external_search_result.html",
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{
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"external_items": ExternalSources.search(category, keywords, page_number) if keywords else [],
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}
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)
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def search(request):
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if settings.SEARCH_BACKEND is None:
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return search2(request)
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category = request.GET.get("c", default='all').strip().lower()
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if category == 'all':
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category = None
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keywords = request.GET.get("q", default='').strip()
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tag = request.GET.get("tag", default='').strip()
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p = request.GET.get('page', default='1')
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page_number = int(p) if p.isdigit() else 1
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if not (keywords or tag):
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return render(
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request,
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"common/search_result.html",
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{
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"items": None,
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}
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)
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if request.user.is_authenticated:
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url_validator = URLValidator()
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try:
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url_validator(keywords)
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# validation success
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return jump_or_scrape(request, keywords)
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except ValidationError as e:
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pass
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result = Indexer.search(keywords, page=page_number, category=category, tag=tag)
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for item in result.items:
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item.tag_list = item.all_tag_list[:TAG_NUMBER_ON_LIST]
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if request.path.endswith('.json/'):
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return JsonResponse({
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'num_pages': result.num_pages,
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'items':list(map(lambda i:i.get_json(), result.items))
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})
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return render(
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request,
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"common/search_result.html",
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{
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"items": result.items,
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"pagination": PageLinksGenerator(PAGE_LINK_NUMBER, page_number, result.num_pages),
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"categories": ['book', 'movie', 'music', 'game'],
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}
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)
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def search2(request):
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if request.method == 'GET':
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# test if input serach string is empty or not excluding param ?c=
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empty_querystring_criteria = {k: v for k, v in request.GET.items() if k != 'c'}
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if not len(empty_querystring_criteria):
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return HttpResponseBadRequest()
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# test if user input an URL, if so jump to URL handling function
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url_validator = URLValidator()
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input_string = request.GET.get('q', default='').strip()
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try:
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url_validator(input_string)
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# validation success
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return jump_or_scrape(request, input_string)
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except ValidationError as e:
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pass
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# category, book/movie/music etc
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category = request.GET.get("c", default='').strip().lower()
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# keywords, seperated by blank space
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# it is better not to split the keywords
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keywords = request.GET.get("q", default='').strip()
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keywords = [keywords] if keywords else ''
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# tag, when tag is provided there should be no keywords , for now
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tag = request.GET.get("tag", default='')
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# white space string, empty query
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if not (keywords or tag):
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return render(
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request,
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"common/search_result.html",
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{
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"items": None,
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}
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)
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def book_param_handler(**kwargs):
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# keywords
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keywords = kwargs.get('keywords')
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# tag
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tag = kwargs.get('tag')
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query_args = []
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q = Q()
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for keyword in keywords:
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q = q | Q(title__icontains=keyword)
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q = q | Q(subtitle__icontains=keyword)
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q = q | Q(orig_title__icontains=keyword)
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if tag:
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q = q & Q(book_tags__content__iexact=tag)
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query_args.append(q)
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queryset = Book.objects.filter(*query_args).distinct()
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def calculate_similarity(book):
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if keywords:
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# search by keywords
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similarity, n = 0, 0
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for keyword in keywords:
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similarity += 1/2 * SequenceMatcher(None, keyword, book.title).quick_ratio()
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+ 1/3 * SequenceMatcher(None, keyword, book.orig_title).quick_ratio()
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+ 1/6 * SequenceMatcher(None, keyword, book.subtitle).quick_ratio()
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n += 1
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book.similarity = similarity / n
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elif tag:
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# search by single tag
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book.similarity = 0 if book.rating_number is None else book.rating_number
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else:
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book.similarity = 0
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return book.similarity
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if len(queryset) > 0:
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ordered_queryset = sorted(queryset, key=calculate_similarity, reverse=True)
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else:
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ordered_queryset = list(queryset)
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return ordered_queryset
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def movie_param_handler(**kwargs):
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# keywords
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keywords = kwargs.get('keywords')
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# tag
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tag = kwargs.get('tag')
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query_args = []
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q = Q()
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for keyword in keywords:
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q = q | Q(title__icontains=keyword)
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q = q | Q(other_title__icontains=keyword)
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q = q | Q(orig_title__icontains=keyword)
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if tag:
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q = q & Q(movie_tags__content__iexact=tag)
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query_args.append(q)
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queryset = Movie.objects.filter(*query_args).distinct()
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def calculate_similarity(movie):
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if keywords:
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# search by name
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similarity, n = 0, 0
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for keyword in keywords:
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similarity += 1/2 * SequenceMatcher(None, keyword, movie.title).quick_ratio()
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+ 1/4 * SequenceMatcher(None, keyword, movie.orig_title).quick_ratio()
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+ 1/4 * SequenceMatcher(None, keyword, movie.other_title).quick_ratio()
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n += 1
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movie.similarity = similarity / n
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elif tag:
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# search by single tag
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movie.similarity = 0 if movie.rating_number is None else movie.rating_number
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else:
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movie.similarity = 0
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return movie.similarity
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if len(queryset) > 0:
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ordered_queryset = sorted(queryset, key=calculate_similarity, reverse=True)
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else:
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ordered_queryset = list(queryset)
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return ordered_queryset
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def game_param_handler(**kwargs):
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# keywords
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keywords = kwargs.get('keywords')
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# tag
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tag = kwargs.get('tag')
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query_args = []
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q = Q()
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for keyword in keywords:
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q = q | Q(title__icontains=keyword)
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q = q | Q(other_title__icontains=keyword)
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q = q | Q(developer__icontains=keyword)
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q = q | Q(publisher__icontains=keyword)
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if tag:
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q = q & Q(game_tags__content__iexact=tag)
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query_args.append(q)
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queryset = Game.objects.filter(*query_args).distinct()
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def calculate_similarity(game):
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if keywords:
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# search by name
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developer_dump = ' '.join(game.developer)
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publisher_dump = ' '.join(game.publisher)
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similarity, n = 0, 0
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for keyword in keywords:
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similarity += 1/2 * SequenceMatcher(None, keyword, game.title).quick_ratio()
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+ 1/4 * SequenceMatcher(None, keyword, game.other_title).quick_ratio()
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+ 1/16 * SequenceMatcher(None, keyword, developer_dump).quick_ratio()
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+ 1/16 * SequenceMatcher(None, keyword, publisher_dump).quick_ratio()
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n += 1
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game.similarity = similarity / n
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elif tag:
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# search by single tag
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game.similarity = 0 if game.rating_number is None else game.rating_number
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else:
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game.similarity = 0
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return game.similarity
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if len(queryset) > 0:
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ordered_queryset = sorted(queryset, key=calculate_similarity, reverse=True)
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else:
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ordered_queryset = list(queryset)
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return ordered_queryset
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def music_param_handler(**kwargs):
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# keywords
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keywords = kwargs.get('keywords')
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# tag
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tag = kwargs.get('tag')
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query_args = []
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q = Q()
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# search albums
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for keyword in keywords:
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q = q | Q(title__icontains=keyword)
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q = q | Q(artist__icontains=keyword)
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if tag:
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q = q & Q(album_tags__content__iexact=tag)
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query_args.append(q)
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album_queryset = Album.objects.filter(*query_args).distinct()
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# extra query args for songs
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q = Q()
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for keyword in keywords:
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q = q | Q(album__title__icontains=keyword)
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q = q | Q(title__icontains=keyword)
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q = q | Q(artist__icontains=keyword)
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if tag:
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q = q & Q(song_tags__content__iexact=tag)
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query_args.clear()
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query_args.append(q)
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song_queryset = Song.objects.filter(*query_args).distinct()
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queryset = list(album_queryset) + list(song_queryset)
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def calculate_similarity(music):
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if keywords:
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# search by name
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similarity, n = 0, 0
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artist_dump = ' '.join(music.artist)
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for keyword in keywords:
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if music.__class__ == Album:
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similarity += 1/2 * SequenceMatcher(None, keyword, music.title).quick_ratio() \
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+ 1/2 * SequenceMatcher(None, keyword, artist_dump).quick_ratio()
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elif music.__class__ == Song:
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similarity += 1/2 * SequenceMatcher(None, keyword, music.title).quick_ratio() \
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+ 1/6 * SequenceMatcher(None, keyword, artist_dump).quick_ratio() \
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+ 1/6 * (SequenceMatcher(None, keyword, music.album.title).quick_ratio() if music.album is not None else 0)
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n += 1
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music.similarity = similarity / n
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elif tag:
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# search by single tag
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music.similarity = 0 if music.rating_number is None else music.rating_number
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else:
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music.similarity = 0
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return music.similarity
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if len(queryset) > 0:
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ordered_queryset = sorted(queryset, key=calculate_similarity, reverse=True)
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else:
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ordered_queryset = list(queryset)
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return ordered_queryset
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def all_param_handler(**kwargs):
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book_queryset = book_param_handler(**kwargs)
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movie_queryset = movie_param_handler(**kwargs)
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music_queryset = music_param_handler(**kwargs)
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game_queryset = game_param_handler(**kwargs)
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ordered_queryset = sorted(
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book_queryset + movie_queryset + music_queryset + game_queryset,
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key=operator.attrgetter('similarity'),
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reverse=True
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)
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return ordered_queryset
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param_handler = {
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'book': book_param_handler,
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'movie': movie_param_handler,
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'music': music_param_handler,
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'game': game_param_handler,
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'all': all_param_handler,
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'': all_param_handler
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}
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categories = [k for k in param_handler.keys() if not k in ['all', '']]
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try:
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queryset = param_handler[category](
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keywords=keywords,
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tag=tag
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)
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except KeyError as e:
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queryset = param_handler['all'](
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keywords=keywords,
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tag=tag
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)
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paginator = Paginator(queryset, ITEMS_PER_PAGE)
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page_number = request.GET.get('page', default=1)
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items = paginator.get_page(page_number)
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items.pagination = PageLinksGenerator(PAGE_LINK_NUMBER, page_number, paginator.num_pages)
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for item in items:
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item.tag_list = item.get_tags_manager().values('content').annotate(
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tag_frequency=Count('content')).order_by('-tag_frequency')[:TAG_NUMBER_ON_LIST]
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return render(
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request,
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"common/search_result.html",
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{
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"items": items,
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"categories": categories,
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}
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)
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else:
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return HttpResponseBadRequest()
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@login_required
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@mastodon_request_included
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def jump_or_scrape(request, url):
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"""
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1. match url to registered scrapers
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2. try to find the url in the db, if exits then jump, else scrape and jump
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"""
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# redirect to this site
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this_site = request.get_host()
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if this_site in url:
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return redirect(url)
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url = get_normalized_url(url)
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scraper = get_scraper_by_url(url)
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if scraper is None:
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# invalid url
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return render(request, 'common/error.html', {'msg': _("链接无效，查询失败")})
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else:
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try:
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effective_url = scraper.get_effective_url(url)
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except ValueError:
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return render(request, 'common/error.html', {'msg': _("链接无效，查询失败")})
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try:
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# raise ObjectDoesNotExist
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entity = scraper.data_class.objects.get(source_url=effective_url)
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# if exists then jump to detail page
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return redirect(entity)
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except ObjectDoesNotExist:
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# scrape if not exists
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try:
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scraper.scrape(url)
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form = scraper.save(request_user=request.user)
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except Exception as e:
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logger.error(f"Scrape Failed URL: {url}\n{e}")
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if settings.DEBUG:
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logger.error("Expections during saving scraped data:", exc_info=e)
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return render(request, 'common/error.html', {'msg': _("爬取数据失败😫")})
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return redirect(form.instance)
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def go_relogin(request):
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return render(request, 'common/error.html', {
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'url': reverse("users:connect") + '?domain=' + request.user.mastodon_site,
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'msg': _("信息已保存，但是未能分享到联邦网络"),
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'secondary_msg': _("可能是你在联邦网络(Mastodon/Pleroma/...)的登录状态过期了，正在跳转到联邦网络重新登录😼")})
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