FIX: make poll voter list expansion persistent (#28352)

* FIX: voter list expansion

* naming improvement

* extend and refine test

plugins/poll/assets/javascripts/discourse/components/poll.gjs

@@ -45,6 +45,7 @@ export default class PollComponent extends Component {
   @tracked vote = this.args.attrs.vote || [];
   @tracked poll = this.args.attrs.poll;
   @tracked preloadedVoters = this.defaultPreloadedVoters();
+  @tracked voterListExpanded = false;
   @tracked hasSavedVote = this.args.attrs.hasSavedVote;
 
   @tracked
@@ -473,8 +474,10 @@ export default class PollComponent extends Component {
 
   @action
   updatedVoters() {
+    if (!this.voterListExpanded) {
       this.preloadedVoters = this.defaultPreloadedVoters();
     }
+  }
 
   @action
   fetchVoters(optionId) {
@@ -501,6 +504,7 @@ export default class PollComponent extends Component {
       },
     })
       .then((result) => {
+        this.voterListExpanded = true;
         const voters = optionId
           ? this.preloadedVoters[optionId].voters
           : this.preloadedVoters;

plugins/poll/test/javascripts/acceptance/poll-results-test.js

@@ -551,7 +551,7 @@ acceptance("Poll results", function (needs) {
               readers_count: 1,
               score: 0,
               yours: true,
-              topic_id: 134,
+              topic_id: 135,
               topic_slug: "load-more-poll-voters-ranked-choice",
               display_username: null,
               primary_group_name: null,
@@ -610,7 +610,7 @@ acceptance("Poll results", function (needs) {
                       votes: 0,
                     },
                   ],
-                  voters: 1,
+                  voters: 2,
                   preloaded_voters: {
                     def034c6770c6fd3754c054ef9ec4721: [
                       {
@@ -654,7 +654,7 @@ acceptance("Poll results", function (needs) {
                     votes: 2,
                   },
                   {
-                    digest: "def034c6770c6fd3754c054ef9ec4721",
+                    digest: "d8c22ff912e03740d9bc19e133e581e0",
                     votes: 0,
                   },
                 ],
@@ -864,7 +864,7 @@ acceptance("Poll results", function (needs) {
           },
         ],
         tags: [],
-        id: 134,
+        id: 135,
         title: "Load more poll voters",
         fancy_title: "Load more poll voters",
         posts_count: 1,
@@ -890,7 +890,7 @@ acceptance("Poll results", function (needs) {
         image_url: null,
         slow_mode_seconds: 0,
         draft: null,
-        draft_key: "topic_134",
+        draft_key: "topic_135",
         draft_sequence: 7,
         posted: true,
         unpinned: null,
@@ -898,7 +898,7 @@ acceptance("Poll results", function (needs) {
         current_post_number: 1,
         highest_post_number: 1,
         last_read_post_number: 1,
-        last_read_post_id: 156,
+        last_read_post_id: 158,
         deleted_by: null,
         has_deleted: false,
         actions_summary: [
@@ -1178,6 +1178,78 @@ acceptance("Poll results", function (needs) {
       2,
       "after clicking fetch voters button, two voters shown on first option"
     );
+
+    await publishToMessageBus("/polls/135", {
+      post_id: "158",
+      polls: [
+        {
+          name: "poll",
+          type: "ranked_choice",
+          status: "open",
+          public: true,
+          results: "always",
+          options: [
+            {
+              id: "def034c6770c6fd3754c054ef9ec4721",
+              html: "This",
+              votes: 3,
+            },
+            {
+              id: "d8c22ff912e03740d9bc19e133e581e0",
+              html: "That",
+              votes: 0,
+            },
+          ],
+          voters: 3,
+          preloaded_voters: {
+            def034c6770c6fd3754c054ef9ec4721: [
+              {
+                rank: 1,
+                user: {
+                  id: 1,
+                  username: "bianca",
+                  name: null,
+                  avatar_template:
+                    "/letter_avatar_proxy/v4/letter/b/3be4f8/{size}.png",
+                },
+              },
+              {
+                rank: 1,
+                user: {
+                  id: 7,
+                  username: "foo",
+                  name: null,
+                  avatar_template:
+                    "/letter_avatar_proxy/v4/letter/f/b19c9b/{size}.png",
+                  title: null,
+                },
+              },
+              {
+                rank: 1,
+                user: {
+                  id: 11,
+                  username: "bar",
+                  name: null,
+                  avatar_template:
+                    "/letter_avatar_proxy/v4/letter/f/f33bef/{size}.png",
+                  title: null,
+                },
+              },
+            ],
+          },
+          chart_type: "bar",
+          title: null,
+        },
+      ],
+    });
+
+    assert.strictEqual(
+      count(
+        ".poll-container .discourse-poll-ranked_choice-results .results li:nth-child(1) .poll-voters li"
+      ),
+      2,
+      "after incoming message containing 3 voters, only 2 voters shown on first option as bus updates are not supported once voters are expanded"
+    );
   });
 
   test("can unvote", async function (assert) {