mirror of
https://github.com/bookwyrm-social/bookwyrm.git
synced 2024-05-16 23:43:04 +00:00
354 lines
12 KiB
Python
354 lines
12 KiB
Python
""" what are we here for if not for posting """
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import re
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import logging
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from django.contrib.auth.decorators import login_required
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from django.core.validators import URLValidator
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from django.core.exceptions import ValidationError
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from django.db import transaction
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from django.db.models import Q
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from django.http import HttpResponse, HttpResponseBadRequest, Http404
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from django.shortcuts import get_object_or_404
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from django.template.response import TemplateResponse
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from django.utils import timezone
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from django.utils.decorators import method_decorator
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from django.views import View
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from django.views.decorators.http import require_POST
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from markdown import markdown
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from bookwyrm import forms, models
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from bookwyrm.models.report import DELETE_ITEM
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from bookwyrm.utils import regex, sanitizer
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from bookwyrm.views.helpers import get_mergeable_object_or_404
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from .helpers import handle_remote_webfinger, is_api_request
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from .helpers import load_date_in_user_tz_as_utc, redirect_to_referer
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logger = logging.getLogger(__name__)
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# pylint: disable= no-self-use
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@method_decorator(login_required, name="dispatch")
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class EditStatus(View):
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"""the view for *posting*"""
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def get(self, request, status_id): # pylint: disable=unused-argument
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"""load the edit panel"""
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status = get_object_or_404(
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models.Status.objects.select_subclasses(), id=status_id
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)
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status_type = "reply" if status.reply_parent else status.status_type.lower()
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data = {
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"type": status_type,
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"book": getattr(status, "book", None),
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"draft": status,
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}
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return TemplateResponse(request, "compose.html", data)
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# pylint: disable= no-self-use
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@method_decorator(login_required, name="dispatch")
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class CreateStatus(View):
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"""the view for *posting*"""
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def get(self, request, status_type): # pylint: disable=unused-argument
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"""compose view (...not used?)"""
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book = get_mergeable_object_or_404(models.Edition, id=request.GET.get("book"))
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data = {"book": book}
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return TemplateResponse(request, "compose.html", data)
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# pylint: disable=too-many-branches
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@transaction.atomic
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def post(self, request, status_type, existing_status_id=None):
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"""create status of whatever type"""
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created = not existing_status_id
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existing_status = None
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if existing_status_id:
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existing_status = get_object_or_404(
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models.Status.objects.select_subclasses(), id=existing_status_id
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)
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existing_status.edited_date = timezone.now()
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status_type = status_type[0].upper() + status_type[1:]
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try:
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form = getattr(forms, f"{status_type}Form")(
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request.POST, instance=existing_status
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)
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except AttributeError as err:
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logger.exception(err)
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return HttpResponseBadRequest()
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if not form.is_valid():
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if is_api_request(request):
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logger.exception(form.errors)
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return HttpResponseBadRequest()
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return redirect_to_referer(request)
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status = form.save(request, commit=False)
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# save the plain, unformatted version of the status for future editing
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status.raw_content = status.content
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if hasattr(status, "quote"):
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status.raw_quote = status.quote
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status.sensitive = status.content_warning not in [None, ""]
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# the status has to be saved now before we can add many to many fields
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# like mentions
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status.save(broadcast=False)
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# inspect the text for user tags
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content = status.content
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mentions = find_mentions(request.user, content)
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for _, mention_user in mentions.items():
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# add them to status mentions fk
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status.mention_users.add(mention_user)
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content = format_mentions(content, mentions)
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# add reply parent to mentions
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if status.reply_parent:
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status.mention_users.add(status.reply_parent.user)
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# inspect the text for hashtags
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hashtags = find_or_create_hashtags(content)
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for _, mention_hashtag in hashtags.items():
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# add them to status mentions fk
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status.mention_hashtags.add(mention_hashtag)
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content = format_hashtags(content, hashtags)
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# deduplicate mentions
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status.mention_users.set(set(status.mention_users.all()))
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# don't apply formatting to generated notes
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if not isinstance(status, models.GeneratedNote) and content:
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status.content = to_markdown(content)
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# do apply formatting to quotes
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if hasattr(status, "quote"):
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status.quote = to_markdown(status.quote)
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status.save(created=created)
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# update a readthrough, if needed
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if bool(request.POST.get("id")):
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try:
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edit_readthrough(request)
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except Http404:
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pass
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if is_api_request(request):
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return HttpResponse()
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return redirect_to_referer(request)
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def format_mentions(content, mentions):
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"""Detect @mentions and make them links"""
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for mention_text, mention_user in mentions.items():
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# turn the mention into a link
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content = re.sub(
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rf"(?<!/)\B{mention_text}\b(?!@)",
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rf'<a href="{mention_user.remote_id}">{mention_text}</a>',
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content,
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)
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return content
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def format_hashtags(content, hashtags):
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"""Detect #hashtags and make them links"""
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for mention_text, mention_hashtag in hashtags.items():
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# turn the mention into a link
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content = re.sub(
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rf"(?<!/)\B{mention_text}\b(?!@)",
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rf'<a href="{mention_hashtag.remote_id}" data-mention="hashtag">'
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+ rf"{mention_text}</a>",
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content,
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)
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return content
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@method_decorator(login_required, name="dispatch")
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class DeleteStatus(View):
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"""tombstone that bad boy"""
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def post(self, request, status_id, report_id=None):
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"""delete and tombstone a status"""
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status = get_object_or_404(models.Status, id=status_id)
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# don't let people delete other people's statuses
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status.raise_not_deletable(request.user)
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# perform deletion
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status.delete()
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# record deletion if it's related to a report
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if report_id:
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models.Report.record_action(report_id, DELETE_ITEM, request.user)
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return redirect_to_referer(request, "/")
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@login_required
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@require_POST
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def update_progress(request, book_id): # pylint: disable=unused-argument
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"""Either it's just a progress update, or it's a comment with a progress update"""
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if request.POST.get("post-status"):
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return CreateStatus.as_view()(request, "comment")
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return edit_readthrough(request)
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@login_required
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@require_POST
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def edit_readthrough(request):
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"""can't use the form because the dates are too finnicky"""
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# TODO: remove this, it duplicates the code in the ReadThrough view
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readthrough = get_object_or_404(models.ReadThrough, id=request.POST.get("id"))
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readthrough.start_date = load_date_in_user_tz_as_utc(
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request.POST.get("start_date"), request.user
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)
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readthrough.finish_date = load_date_in_user_tz_as_utc(
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request.POST.get("finish_date"), request.user
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)
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progress = request.POST.get("progress")
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try:
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progress = int(progress)
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readthrough.progress = progress
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except (ValueError, TypeError):
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pass
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progress_mode = request.POST.get("progress_mode")
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try:
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progress_mode = models.ProgressMode(progress_mode)
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readthrough.progress_mode = progress_mode
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except ValueError:
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pass
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readthrough.save()
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# record the progress update individually
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# use default now for date field
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readthrough.create_update()
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if is_api_request(request):
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return HttpResponse()
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return redirect_to_referer(request)
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def find_mentions(user, content):
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"""detect @mentions in raw status content"""
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if not content:
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return {}
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# The regex has nested match groups, so the 0th entry has the full (outer) match
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# And because the strict username starts with @, the username is 1st char onward
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usernames = [m[0][1:] for m in re.findall(regex.STRICT_USERNAME, content)]
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known_users = (
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models.User.viewer_aware_objects(user)
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.filter(Q(username__in=usernames) | Q(localname__in=usernames))
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.distinct()
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)
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# Prepare a lookup based on both username and localname
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username_dict = {
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**{f"@{u.username}": u for u in known_users},
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**{f"@{u.localname}": u for u in known_users.filter(local=True)},
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}
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# Users not captured here could be blocked or not yet loaded on the server
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not_found = set(usernames) - set(username_dict.keys())
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for username in not_found:
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mention_user = handle_remote_webfinger(username, unknown_only=True)
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if not mention_user:
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# this user is blocked or can't be found
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continue
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username_dict[f"@{mention_user.username}"] = mention_user
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username_dict[f"@{mention_user.localname}"] = mention_user
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return username_dict
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def find_or_create_hashtags(content):
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"""detect #hashtags in raw status content
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it stores hashtags case-sensitive, but ensures that an existing
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hashtag with different case are found and re-used. for example,
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an existing #BookWyrm hashtag will be found and used even if the
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status content is using #bookwyrm.
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"""
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if not content:
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return {}
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found_hashtags = {t.lower(): t for t in re.findall(regex.HASHTAG, content)}
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if len(found_hashtags) == 0:
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return {}
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known_hashtags = {
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t.name.lower(): t
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for t in models.Hashtag.objects.filter(
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Q(name__in=found_hashtags.keys())
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).distinct()
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}
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not_found = found_hashtags.keys() - known_hashtags.keys()
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for lower_name in not_found:
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tag_name = found_hashtags[lower_name]
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mention_hashtag = models.Hashtag(name=tag_name)
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mention_hashtag.save()
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known_hashtags[lower_name] = mention_hashtag
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return {found_hashtags[k]: v for k, v in known_hashtags.items()}
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def format_links(content):
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"""detect and format links"""
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validator = URLValidator(["http", "https"])
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schema_re = re.compile(r"\bhttps?://")
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split_content = re.split(r"(\s+)", content)
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for i, potential_link in enumerate(split_content):
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if not schema_re.search(potential_link):
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continue
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# Strip surrounding brackets and trailing punctuation.
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prefix, potential_link, suffix = _unwrap(potential_link)
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try:
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# raises an error on anything that's not a valid link
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validator(potential_link)
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# use everything but the scheme in the presentation of the link
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link = schema_re.sub("", potential_link)
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split_content[i] = f'{prefix}<a href="{potential_link}">{link}</a>{suffix}'
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except (ValidationError, UnicodeError):
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pass
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return "".join(split_content)
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def _unwrap(text):
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"""split surrounding brackets and trailing punctuation from a string of text"""
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punct = re.compile(r'([.,;:!?"’”»]+)$')
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prefix = suffix = ""
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if punct.search(text):
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# Move punctuation to suffix segment.
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text, suffix, _ = punct.split(text)
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for wrapper in ("()", "[]", "{}"):
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if text[0] == wrapper[0] and text[-1] == wrapper[-1]:
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# Split out wrapping chars.
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suffix = text[-1] + suffix
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prefix, text = text[:1], text[1:-1]
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break # Nested wrappers not supported atm.
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if punct.search(text):
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# Move inner punctuation to suffix segment.
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text, inner_punct, _ = punct.split(text)
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suffix = inner_punct + suffix
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return prefix, text, suffix
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def to_markdown(content):
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"""catch links and convert to markdown"""
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content = format_links(content)
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content = markdown(content)
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# sanitize resulting html
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return sanitizer.clean(content)
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