1 files changed, 40 insertions, 0 deletions
diff --git a/static/js/themes.js b/static/js/themes.js
new file mode 100644
index 0000000..3f1b906
--- /dev/null
+++ b/static/js/themes.js
@@ -0,0 +1,40 @@
+function setCookie(key, value, age) {
+	document.cookie = key + "=" + encodeURIComponent(value) + ";sameSite=strict;max-age=" + 60 * 60 * 24 * age + ";path=/";
+}
+
+function getCookie(key) {
+	if (document.cookie.length != 0) {
+		return document.cookie.split('; ').find(row => row.startsWith(key)).split('=')[1];
+	}
+	return "";
+}
+
+function setTheme(name) {
+	for (let i = 0, tags = document.getElementsByTagName("link"); i < tags.length; i++) {
+		if (tags[i].type === "text/css" && tags[i].title) {
+			tags[i].disabled = !(tags[i].title === name);
+		}
+	}
+
+	setCookie("theme", name, 3650);
+}
+
+function applyTheme() {
+	// HACK: disable all of the themes first. this for some reason makes things work.
+	for (let i = 0, tags = document.getElementsByTagName("link"); i < tags.length; i++) {
+		if (tags[i].type === "text/css" && tags[i].title) {
+			tags[i].disabled = true;
+		}
+	}
+	let theme = getCookie("theme") || "default";
+	setTheme(theme);
+
+	// reflect this in the switcher
+	let switcher = document.getElementById("themeSwitcher");
+	for(var i = 0; i < switcher.options.length; i++) {
+		if (switcher.options[i].value === theme) {
+			switcher.selectedIndex = i;
+			break;
+		}
+	}
+}