From 870ccb5124109afadb42691efea8cb727cbde326 Mon Sep 17 00:00:00 2001
From: the lemons <citrons@mondecitronne.com>
Date: Mon, 7 Feb 2022 14:43:23 -0600
Subject: bugfixes and miscellaneous improvements

---
 zzcxz.cgi | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/zzcxz.cgi b/zzcxz.cgi
index 74dbfc5..7fa53ee 100755
--- a/zzcxz.cgi
+++ b/zzcxz.cgi
@@ -92,11 +92,12 @@ local function parse_qs(str,sep)
 	return values
 end
 
-local cookies = parse_qs(env "HTTP_COOKIE","; ")
+local cookies = env "HTTP_COOKIE" and parse_qs(env "HTTP_COOKIE","; ") or {}
 local flags = {}
 for k,v in pairs(cookies) do
-	if k:sub(1,5) == "flag_" then
-		flags[k:sub(6)] = v
+	local flag = k:match "flag_(.+)"
+	if flag then
+		flags[flag] = v
 	end
 end
 
@@ -168,10 +169,13 @@ local function parse_directive(line, directives)
 		local text = ""
 		if not flagname then
 			flagname, text = args:match "^%s*(%w+)%s*(%w+)%s*$"
-			if not flagname or not text or utf8.len(text) > 1000 then return end
+			if not flagname or not text or utf8.len(text) > 1000 then
+				return
+			end
 		end
 		if utf8.len(flagname) > 150 then return end
-		directives.flags["flag_"..flagname] = url_encode(text)
+		directives.flags_updated[flagname] = text
+		flags[flagname] = text
 	else
 		return
 	end
@@ -181,7 +185,7 @@ end
 local load_page
 local function convert_markup(m)
 	local result = {}
-	local directives = {flags={}}
+	local directives = {flags_updated = {}}
 	local code_block = false
 	for line in (m..'\n'):gmatch "(.-)\n" do
 		if not code_block then
@@ -276,7 +280,8 @@ local function new_action(page, action, result)
 ::generate_name::
 	local new_name = {}
 	for i=1,5 do
-		table.insert(new_name, string.char(string.byte 'a' + math.random(0,25)))
+		table.insert(new_name, string.char(
+			string.byte 'a' + math.random(0,25)))
 	end
 	new_name = table.concat(new_name)
 
@@ -320,10 +325,6 @@ map["^/g/(%w%w%w%w%w)$"] = function(p)
 	local page = load_page(p)
 	if not page then return not_found() end
 	local _, directives = convert_markup(page.content)
-	local cookies = {}
-	for k,v in pairs(directives.flags) do
-		table.insert(cookies,k.."="..v.."; Secure; Max-Age=1000000000")
-	end
 	if env "REQUEST_METHOD" ~= "POST" then
 		local actions = {}
 		for _,a in ipairs(page.actions) do
@@ -340,6 +341,13 @@ map["^/g/(%w%w%w%w%w)$"] = function(p)
 			)
 		end
 
+		local cookies = {}
+		for flagname, text in pairs(directives.flags_updated) do
+			table.insert(cookies,
+				('flag_%s=%s; Secure; Max-Age=999999999')
+					:format(flagname, url_encode(text)))
+		end
+
 		return base {
 			title = html_encode(page.title),
 			content = page_template {
-- 
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