From fd87cf95ee463a4a84766f95afb538c00ff0e06f Mon Sep 17 00:00:00 2001
From: Robin Malley <rmalley@cock.li>
Date: Sun, 4 Apr 2021 06:11:55 +0000
Subject: [PATCH] Add bookmark script.

Add a script that saves the position on read pages to localstorage, and
restores the page position when the page is reloaded.
---
 assets/bookmark.js             | 9 +++++++++
 conf/smr.conf.in               | 1 +
 src/lua/endpoints/read_get.lua | 3 +++
 3 files changed, 13 insertions(+)
 create mode 100644 assets/bookmark.js

diff --git a/assets/bookmark.js b/assets/bookmark.js
new file mode 100644
index 0000000..8362005
--- /dev/null
+++ b/assets/bookmark.js
@@ -0,0 +1,9 @@
+
+window.onbeforeunload = function(e) {
+	localStorage.setItem(window.location.pathname,window.scrollY)
+}
+document.addEventListener("DOMContentLoaded", function(e) {
+	var scrollpos = localStorage.getItem(window.location.pathname)
+	if(scrollpos)
+		window.scrollTo(0,scrollpos)
+})
diff --git a/conf/smr.conf.in b/conf/smr.conf.in
index 3f36dab..9de3ed0 100644
--- a/conf/smr.conf.in
+++ b/conf/smr.conf.in
@@ -45,6 +45,7 @@ domain * {
 	route  /_css/milligram.min.css.map asset_serve_milligram_min_css_map
 	route  /_faq asset_serve_faq_html
 	route  /_js/suggest_tags.js asset_serve_suggest_tags_js
+	route  /_js/bookmark.js asset_serve_bookmark_js
 	route  /favicon.ico asset_serve_favicon_ico
 	route  /_paste  post_story
 	route  /_edit   edit_story
diff --git a/src/lua/endpoints/read_get.lua b/src/lua/endpoints/read_get.lua
index 17fb549..354f094 100644
--- a/src/lua/endpoints/read_get.lua
+++ b/src/lua/endpoints/read_get.lua
@@ -97,6 +97,9 @@ local function read_get(req)
 		host = http_request_get_host(req),
 		path = http_request_get_path(req),
 		method = http_method_text(req),
+		extra_load = {
+			'<script src="/_js/bookmark.js"></script>'
+		}
 	}
 	local err
 	--Get our story id