default theme option and slight improvement to head template

gulp/res/js/theme.js

@@ -1,11 +1,20 @@
 function changeTheme(e) {
 	var theme = e ? this.value : localStorage.getItem('theme');
 	if (!theme) {
-		return;
+		theme = 'default';
 	}
-	localStorage.setItem('theme', theme)
+	localStorage.setItem('theme', theme);
 	var themeLink = document.getElementById('theme');
-	themeLink.href = '/css/themes/'+theme+'.css';
+	//if somebody makes a theme file named "default", it wont work. so just dont.
+	if (theme === 'default') {
+		var defaultTheme = themeLink.dataset.theme;
+		var defaultHref = '/css/themes/'+defaultTheme+'.css';
+		if (themeLink.href !== defaultHref) {
+			themeLink.href = '/css/themes/'+defaultTheme+'.css';
+		}
+	} else {
+		themeLink.href = '/css/themes/'+theme+'.css';
+	}
 }
 
 changeTheme();

views/includes/footer.pug

@@ -6,6 +6,4 @@ small.footer#bottom
 	|  - 
 	a(href='https://github.com/fatchan/jschan/') source code
 	|  -  
-	select.jsonly#theme-changer(name='theme')
-		each theme in themes
-			option(value=theme) #{theme}
+	include ./themeswitcher.pug

views/includes/head.pug

@@ -1,10 +1,8 @@
 meta(charset='utf-8')
 meta(name='viewport', content='width=device-width, initial-scale=1')
 link(rel='stylesheet' href='/css/style.css')
-if board && board.settings.theme
-	link#theme(rel='stylesheet' href=`/css/themes/${board.settings.theme}.css`)
-else
-	link#theme(rel='stylesheet' href=`/css/themes/${defaultTheme}.css`)
+- const theme = board ? board.settings.theme : defaultTheme;
+link#theme(rel='stylesheet' data-theme=theme href=`/css/themes/${theme}.css`)
 noscript
 	style
 		| .jsonly { display: none }

views/includes/themeswitcher.pug

@@ -0,0 +1,4 @@
+select.jsonly#theme-changer(name='theme')
+	option(value='default') default
+	each theme in themes
+		option(value=theme) #{theme}