From 1958a22bd8564d7a6fe46711276c7204ccd3b1e3 Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Tue, 27 Jun 2023 08:17:24 +0000
Subject: [PATCH] docs: Copy page handler from wiki

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---
 Makefile.am         |  1 +
 src/web/__init__.py |  4 +++
 src/web/docs.py     | 88 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 93 insertions(+)
 create mode 100644 src/web/docs.py

diff --git a/Makefile.am b/Makefile.am
index a95a0344..44271451 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -84,6 +84,7 @@ web_PYTHON = \
 	src/web/base.py \
 	src/web/blog.py \
 	src/web/boot.py \
+	src/web/docs.py \
 	src/web/donate.py \
 	src/web/downloads.py \
 	src/web/fireinfo.py \
diff --git a/src/web/__init__.py b/src/web/__init__.py
index e3dc4a2b..633d923e 100644
--- a/src/web/__init__.py
+++ b/src/web/__init__.py
@@ -17,6 +17,7 @@ from .handlers import *
 from . import auth
 from . import blog
 from . import boot
+from . import docs
 from . import donate
 from . import downloads
 from . import fireinfo
@@ -135,6 +136,9 @@ class Application(tornado.web.Application):
 			(r"/blog/([0-9a-z\-\._]+)/edit", blog.EditHandler),
 			(r"/blog/([0-9a-z\-\._]+)/publish", blog.PublishHandler),
 
+			# Docs
+			(r"/docs([A-Za-z0-9\-_\/]+)?", docs.PageHandler),
+
 			# Downloads
 			(r"/downloads", downloads.IndexHandler),
 			(r"/downloads/mirrors", downloads.MirrorsHandler),
diff --git a/src/web/docs.py b/src/web/docs.py
new file mode 100644
index 00000000..0e87bb6c
--- /dev/null
+++ b/src/web/docs.py
@@ -0,0 +1,88 @@
+#!/usr/bin/python3
+
+import difflib
+import tornado.web
+
+from . import base
+
+class PageHandler(base.BaseHandler):
+	@property
+	def action(self):
+		return self.get_argument("action", None)
+
+	def write_error(self, status_code, **kwargs):
+		# Render a custom page for 404
+		if status_code == 404:
+			self.render("wiki/404.html", **kwargs)
+			return
+
+		# Otherwise raise this to one layer above
+		super().write_error(status_code, **kwargs)
+
+	@tornado.web.removeslash
+	def get(self, path):
+		if path is None:
+			path = "/"
+
+		# Check permissions
+		if not self.backend.wiki.check_acl(path, self.current_user):
+			raise tornado.web.HTTPError(403, "Access to %s not allowed for %s" % (path, self.current_user))
+
+		# Check if we are asked to render a certain revision
+		revision = self.get_argument("revision", None)
+
+		# Fetch the wiki page
+		page = self.backend.wiki.get_page(path, revision=revision)
+
+		# Diff
+		if self.action == "diff":
+			# Get both revisions
+			a = self.get_argument("a")
+			b = self.get_argument("b")
+
+			# Fetch both versions of the page
+			a = self.backend.wiki.get_page(path, revision=a)
+			b = self.backend.wiki.get_page(path, revision=b)
+			if not a or not b:
+				raise tornado.web.HTTPError(404)
+
+			# Cannot render a diff for the identical page
+			if a == b:
+				raise tornado.web.HTTPError(400)
+
+			# Make sure that b is newer than a
+			if a > b:
+				a, b = b, a
+
+			self.render("wiki/diff.html", page=page, a=a, b=b)
+			return
+
+		# Restore
+		elif self.action == "restore":
+			self.render("wiki/confirm-restore.html", page=page)
+			return
+
+		# Revisions
+		elif self.action == "revisions":
+			self.render("wiki/revisions.html", page=page)
+			return
+
+		# If the page does not exist, we send 404
+		if not page or page.was_deleted():
+			# Handle /start links which were in the format of DokuWiki
+			if path.endswith("/start"):
+				# Strip /start from path
+				path = path[:-6] or "/"
+
+				# Redirect user to page if it exists
+				page = self.backend.wiki.page_exists(path)
+				if page:
+					self.redirect(path)
+
+			raise tornado.web.HTTPError(404)
+
+		# Fetch the latest revision
+		latest_revision = page.get_latest_revision()
+
+		# Render page
+		self.render("wiki/page.html", page=page, latest_revision=latest_revision)
-- 
2.39.2