REFACTOR: Remove `Discourse.HighlightJSPath` from globals

Instead we use the session, and pass that along where necessary.

app/assets/javascripts/admin/components/highlighted-code.js

@@ -5,7 +5,7 @@ import highlightSyntax from "discourse/lib/highlight-syntax";
 export default Component.extend({
   @on("didInsertElement")
   @observes("code")
-  _refresh: function() {
-    highlightSyntax($(this.element), this.siteSettings);
+  _refresh() {
+    highlightSyntax($(this.element), this.siteSettings, this.session);
   }
 });

app/assets/javascripts/admin/models/theme.js

@@ -313,7 +313,7 @@ const Theme = RestModel.extend({
           }
         );
         // TODO: Models shouldn't be updating the DOM
-        highlightSyntax(undefined, this.siteSettings);
+        highlightSyntax(undefined, this.siteSettings, this.session);
       } else {
         return this.save({ remote_update: true }).then(() =>
           this.set("changed", false)

app/assets/javascripts/discourse/app/initializers/post-decorations.js

@@ -9,9 +9,10 @@ export default {
   initialize(container) {
     withPluginApi("0.1", api => {
       const siteSettings = container.lookup("site-settings:main");
+      const session = container.lookup("session:main");
       api.decorateCooked(
         elem => {
-          return highlightSyntax(elem, siteSettings);
+          return highlightSyntax(elem, siteSettings, session);
         },
         {
           id: "discourse-syntax-highlighting"

app/assets/javascripts/discourse/app/lib/highlight-syntax.js

@@ -3,11 +3,11 @@ let _moreLanguages = [];
 
 import loadScript from "discourse/lib/load-script";
 
-export default function highlightSyntax($elem, siteSettings) {
+export default function highlightSyntax($elem, siteSettings, session) {
   const selector = siteSettings.autohighlight_all_code
       ? "pre code"
       : "pre code[class]",
-    path = Discourse.HighlightJSPath;
+    path = session.highlightJsPath;
 
   if (!path) {
     return;

app/assets/javascripts/discourse/app/pre-initializers/discourse-bootstrap.js

@@ -96,7 +96,7 @@ export default {
         .trim() === "dark"
     );
 
-    app.HighlightJSPath = setupData.highlightJsPath;
+    Session.currentProp("highlightJsPath", setupData.highlightJsPath);
     Session.currentProp("svgSpritePath", setupData.svgSpritePath);
 
     if (isDevelopment()) {

test/javascripts/components/highlighted-code-test.js

@@ -8,7 +8,7 @@ componentTest("highlighting code", {
   template: "{{highlighted-code lang='ruby' code=code}}",
 
   beforeEach() {
-    Discourse.HighlightJSPath =
+    this.session.highlightJsPath =
       "assets/highlightjs/highlight-test-bundle.min.js";
     this.set("code", "def test; end");
   },
@@ -27,7 +27,7 @@ componentTest("large code blocks are not highlighted", {
   template: "{{highlighted-code lang='ruby' code=code}}",
 
   beforeEach() {
-    Discourse.HighlightJSPath =
+    this.session.highlightJsPath =
       "assets/highlightjs/highlight-test-bundle.min.js";
     this.set("code", LONG_CODE_BLOCK);
   },

test/javascripts/helpers/component-test.js

@@ -4,6 +4,7 @@ import { autoLoadModules } from "discourse/initializers/auto-load-modules";
 import TopicTrackingState from "discourse/models/topic-tracking-state";
 import User from "discourse/models/user";
 import Site from "discourse/models/site";
+import Session from "discourse/models/session";
 import { currentSettings } from "helpers/site-settings";
 
 export default function(name, opts) {
@@ -15,16 +16,21 @@ export default function(name, opts) {
 
   test(name, function(assert) {
     this.site = Site.current();
+    this.session = Session.current();
 
     this.registry.register("site-settings:main", currentSettings(), {
       instantiate: false
     });
     this.registry.register("capabilities:main", EmberObject);
     this.registry.register("site:main", this.site, { instantiate: false });
+    this.registry.register("session:main", this.session, {
+      instantiate: false
+    });
     this.registry.injection("component", "siteSettings", "site-settings:main");
     this.registry.injection("component", "appEvents", "service:app-events");
     this.registry.injection("component", "capabilities", "capabilities:main");
     this.registry.injection("component", "site", "site:main");
+    this.registry.injection("component", "session", "session:main");
 
     this.siteSettings = currentSettings();
     autoLoadModules(this.container, this.registry);