# HG changeset patch
# User Matthew Wild <mwild1@gmail.com>
# Date 1687465896 -3600
# Node ID b284dc4816cdaa486385f062b77d5b5e6a16cd5e
# Parent  68a0c983bf49502856a14a564a20fffebf6ee6b2
web: Add a few new helper functions

diff -r 68a0c983bf49 -r b284dc4816cd src/web/web.lua
--- a/src/web/web.lua	Thu Jun 22 21:30:40 2023 +0100
+++ b/src/web/web.lua	Thu Jun 22 21:31:36 2023 +0100
@@ -55,6 +55,11 @@
 	return post_body;
 end
 
+local function parse_query(request)
+	local q = request.url.query;
+	return q and http_util.formdecode(q) or nil;
+end
+
 -- Cookies
 
 local function add_header(headers, header, value)
@@ -73,6 +78,21 @@
 	end
 end
 
+local response_mt = {};
+
+local function redirect(to, code)
+	return setmetatable({
+		status_code = code or 303;
+		headers = {
+			Location = to;
+		}
+	}, response_mt);
+end
+
+local function is_response(obj)
+	return getmetatable(obj) == response_mt;
+end
+
 local function set_cookie(headers, cookie, opts)
 	if opts then
 		local params = {""};
@@ -97,12 +117,30 @@
 	prefix_header(headers, "set_cookie", cookie);
 end
 
+local function set_auth_cookie(username, response, secret)
+	local expires = config.cookie_ttl or 604800;
+	local cookie = usercookie.generate(username, os.time()+expires, secret);
+	cookie = "__Host-auth=".. cookie .. "; Path="..config.base_path
+		.."; Max-Age="..tostring(expires).."; Secure; HttpOnly";
+	return set_cookie(response.headers, cookie);
+end
+
+local function verify_auth_cookie(request, secret)
+	unpack_cookies(request);
+	request.cookies.auth = usercookie.verify(request.cookies["__Host-auth"], secret);
+end
+
 return {
 	unpack_cookies = unpack_cookies;
 	validate_csrf = validate_csrf;
 	parse_body_and_csrf = parse_body_and_csrf;
 	parse_body = parse_body;
+	parse_query = parse_query;
 	add_header = add_header;
 	prefix_header = prefix_header;
+	redirect = redirect;
 	set_cookie = set_cookie;
+	set_auth_cookie = set_auth_cookie;
+	verify_auth_cookie = verify_auth_cookie;
+	is_response = is_response;
 };