FIX: respect "external_links_in_new_tab" user preference... (#622)

... for AI conversations since they look & feel "external".

Internal ref - /t/128182

assets/javascripts/discourse/routes/discourse-ai-shared-conversation-show.js

@@ -1,8 +1,19 @@
+import { service } from "@ember/service";
 import DiscourseRoute from "discourse/routes/discourse";
 
-export default DiscourseRoute.extend({
+export default class DiscourseAiSharedConversationShowRoute extends DiscourseRoute {
+  @service currentUser;
+
   beforeModel(transition) {
-    window.location = transition.intent.url;
+    if (this.currentUser?.user_option?.external_links_in_new_tab) {
+      window.open(transition.intent.url, "_blank");
+    } else {
+      this.redirect(transition.intent.url);
+    }
     transition.abort();
-  },
-});
+  }
+
+  redirect(url) {
+    window.location = url;
+  }
+}

test/javascripts/unit/routes/discourse-ai-shared-conversation-show-route-test.js

@@ -0,0 +1,64 @@
+import { setupTest } from "ember-qunit";
+import { module, test } from "qunit";
+
+module(
+  "Unit | Route | discourse-ai-shared-conversation-show",
+  function (hooks) {
+    setupTest(hooks);
+
+    test("it redirects based on currentUser preference", function (assert) {
+      const transition = {
+        intent: { url: "https://www.discourse.org" },
+        abort() {
+          assert.ok(true, "transition.abort() was called");
+        },
+      };
+
+      const route = this.owner.lookup(
+        "route:discourse-ai-shared-conversation-show"
+      );
+
+      const originalOpen = window.open;
+      const originalRedirect = route.redirect;
+
+      // Test when external_links_in_new_tab is true
+      route.set("currentUser", {
+        user_option: {
+          external_links_in_new_tab: true,
+        },
+      });
+
+      window.open = (url, target) => {
+        assert.equal(
+          url,
+          "https://www.discourse.org",
+          "window.open was called with the correct URL"
+        );
+        assert.equal(target, "_blank", 'window.open was called with "_blank"');
+      };
+
+      route.beforeModel(transition);
+
+      // Test when external_links_in_new_tab is false
+      route.set("currentUser", {
+        user_option: {
+          external_links_in_new_tab: false,
+        },
+      });
+
+      route.redirect = (url) => {
+        assert.equal(
+          url,
+          "https://www.discourse.org",
+          "redirect was called with the correct URL"
+        );
+      };
+
+      route.beforeModel(transition);
+
+      // Reset
+      window.open = originalOpen;
+      route.redirect = originalRedirect;
+    });
+  }
+);