FEATURE: Theme settings in handlerbars templates

app/assets/javascripts/discourse/helpers/theme-setting-injector.es6

@@ -0,0 +1,19 @@
+// A small helper to inject theme settings into
+// context objects of handlebars templates used
+// in themes
+
+import { registerHelper } from 'discourse-common/lib/helpers';
+
+registerHelper('theme-setting-injector', function(arr, hash) {
+  const context = hash.context;
+  let value = hash.value;
+
+  if (typeof value === "string") {
+    value = value.replace(/\\u0022/g, '"');
+  }
+
+  if (!context.get("themeSettings")) {
+    context.set("themeSettings", {});
+  }
+  context.set(`themeSettings.${hash.key}`, value);
+});

app/models/theme_field.rb

@@ -59,9 +59,17 @@ PLUGIN_API_JS
     doc = Nokogiri::HTML.fragment(html)
     doc.css('script[type="text/x-handlebars"]').each do |node|
       name = node["name"] || node["data-template-name"] || "broken"
+
+      setting_helpers = ''
+      theme.cached_settings.each do |k, v|
+        val = v.is_a?(String) ? "\"#{v.gsub('"', "\\u0022")}\"" : v
+        setting_helpers += "{{theme-setting-injector context=this key=\"#{k}\" value=#{val}}}\n"
+      end
+      hbs_template = setting_helpers + node.inner_html
+
       is_raw = name =~ /\.raw$/
       if is_raw
-        template = "requirejs('discourse-common/lib/raw-handlebars').template(#{Barber::Precompiler.compile(node.inner_html)})"
+        template = "requirejs('discourse-common/lib/raw-handlebars').template(#{Barber::Precompiler.compile(hbs_template)})"
         node.replace <<COMPILED
           <script>
             (function() {
@@ -70,7 +78,7 @@ PLUGIN_API_JS
           </script>
 COMPILED
       else
-        template = "Ember.HTMLBars.template(#{Barber::Ember::Precompiler.compile(node.inner_html)})"
+        template = "Ember.HTMLBars.template(#{Barber::Ember::Precompiler.compile(hbs_template)})"
         node.replace <<COMPILED
           <script>
             (function() {