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import datetime
import difflib
import html
import re
import requests
from flask import redirect, request, url_for
from werkzeug.exceptions import BadRequest
from pysite.base_route import RouteView
from pysite.constants import DEBUG_MODE, EDITOR_ROLES, GITHUB_TOKEN, WIKI_AUDIT_WEBHOOK
from pysite.decorators import csrf, require_roles
from pysite.mixins import DBMixin
from pysite.rst import render
STRIP_REGEX = re.compile(r"<[^<]+?>")
class EditView(RouteView, DBMixin):
path = "/edit/<path:page>" # "path" means that it accepts slashes
name = "edit"
table_name = "wiki"
revision_table_name = "wiki_revisions"
@require_roles(*EDITOR_ROLES)
def get(self, page):
rst = ""
title = ""
preview = "<p>Preview will appear here.</p>"
obj = self.db.get(self.table_name, page)
if obj:
rst = obj.get("rst", "")
title = obj.get("title", "")
preview = obj.get("html", preview)
if obj.get("lock_expiry") and obj.get("lock_user") != self.user_data.get("user_id"):
lock_time = datetime.datetime.fromtimestamp(obj["lock_expiry"])
if datetime.datetime.utcnow() < lock_time:
return self.render("wiki/page_in_use.html", page=page, can_edit=True)
lock_expiry = datetime.datetime.utcnow() + datetime.timedelta(minutes=5)
if not DEBUG_MODE: # If we are in debug mode we have no user logged in, therefore we can skip locking
self.db.insert(
self.table_name,
{
"slug": page,
"lock_expiry": lock_expiry.timestamp(),
"lock_user": self.user_data.get("user_id")
},
conflict="update"
)
return self.render("wiki/page_edit.html", page=page, rst=rst, title=title, preview=preview, can_edit=True)
@require_roles(*EDITOR_ROLES)
@csrf
def post(self, page):
rst = request.form.get("rst")
title = request.form["title"]
if not rst or not rst.strip():
raise BadRequest()
if not title or not title.strip():
raise BadRequest()
rendered = render(rst)
obj = {
"slug": page,
"title": request.form["title"],
"rst": rst,
"html": rendered["html"],
"text": html.unescape(STRIP_REGEX.sub("", rendered["html"]).strip()),
"headers": rendered["headers"]
}
self.audit_log(page, obj)
self.db.insert(
self.table_name,
obj,
conflict="replace"
)
if not DEBUG_MODE:
# Add the post to the revisions table
revision_payload = {
"slug": page,
"post": obj,
"date": datetime.datetime.utcnow().timestamp(),
"user": self.user_data.get("user_id")
}
del revision_payload["post"]["slug"]
self.db.insert(self.revision_table_name, revision_payload)
return redirect(url_for("wiki.page", page=page), code=303) # Redirect, ensuring a GET
@require_roles(*EDITOR_ROLES)
@csrf
def patch(self, page):
current = self.db.get(self.table_name, page)
if not current:
return "", 404
if current.get("lock_expiry"): # If there is a lock present
# If user patching is not the user with the lock end here
if current["lock_user"] != self.user_data.get("user_id"):
return "", 400
new_lock = datetime.datetime.utcnow() + datetime.timedelta(minutes=5) # New lock time, 5 minutes in future
self.db.insert(self.table_name, {
"slug": page,
"lock_expiry": new_lock.timestamp()
}, conflict="update") # Update with new lock time
return "", 204
def audit_log(self, page, obj):
if WIKI_AUDIT_WEBHOOK: # If the audit webhook is not configured there is no point processing the diff
before = self.db.get(self.table_name, page)
if not before: # If this is a new page, before will be None
before = []
else:
if before.get("rst") is None:
before = []
else:
before = before["rst"].splitlines(keepends=True)
if len(before) == 0:
pass
else:
if not before[-1].endswith("\n"):
before[-1] += "\n" # difflib sometimes messes up if a newline is missing on last line
after = obj['rst'].splitlines(keepends=True) or [""]
if not after[-1].endswith("\n"):
after[-1] += "\n" # Does the same thing as L57
diff = difflib.unified_diff(before, after, fromfile="before.rst", tofile="after.rst")
diff = "".join(diff)
gist_payload = {
"description": f"Changes to: {obj['title']}",
"public": False,
"files": {
"changes.md": {
"content": f"```diff\n{diff}\n```"
}
}
}
headers = {
"Authorization": f"token {GITHUB_TOKEN}",
"User-Agent": "Discord Python Wiki (https://gitlab.com/discord-python)"
}
gist = requests.post("https://api.github.com/gists",
json=gist_payload,
headers=headers)
audit_payload = {
"username": "Wiki Updates",
"embeds": [
{
"title": "Page Edit",
"description": f"**{obj['title']}** was edited by **{self.user_data.get('username')}**"
f".\n\n[View diff]({gist.json().get('html_url')})",
"color": 4165079,
"timestamp": datetime.datetime.utcnow().isoformat(),
"thumbnail": {
"url": "https://pythondiscord.com/static/logos/logo_discord.png"
}
}
]
}
requests.post(WIKI_AUDIT_WEBHOOK, json=audit_payload)
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