gr-change-actions: use change-model for latestPatchNum Release-Notes: skip Change-Id: If2e8a7b3ce9825459d672feb30d16172312c9d6c (cherry picked from commit f4ddeed6b61268535761b8310f4b272c90bdc3ac)

diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts
index 917b7ca..11269ed 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions.ts

@@ -48,7 +48,7 @@
   isQuickLabelInfo,
   LabelInfo,
   NumericChangeId,
-  PatchSetNum,
+  PatchSetNumber,
   RequestPayload,
   RevertSubmissionInfo,
   ReviewInput,
@@ -107,6 +107,7 @@
 import {rootUrl} from '../../../utils/url-util';
 import {createSearchUrl} from '../../../models/views/search';
 import {createChangeUrl} from '../../../models/views/change';
+import {subscribe} from '../../lit/subscription-controller';
 
 const ERR_BRANCH_EMPTY = 'The destination branch can’t be empty.';
 const ERR_COMMIT_EMPTY = 'The commit message can’t be empty.';
@@ -431,8 +432,7 @@
   @property({type: Boolean})
   hasParent?: boolean;
 
-  @property({type: String})
-  latestPatchNum?: PatchSetNum;
+  @state() latestPatchNum?: PatchSetNumber;
 
   @property({type: String})
   commitMessage = '';
@@ -552,6 +552,11 @@
     this.addEventListener('fullscreen-overlay-closed', () =>
       this.handleShowBackgroundContent()
     );
+    subscribe(
+      this,
+      () => this.getChangeModel().latestPatchNum$,
+      x => (this.latestPatchNum = x)
+    );
   }
 
   override connectedCallback() {
@@ -1342,7 +1347,7 @@
   }
 
   // private but used in test
-  getRevision(change: ChangeViewChangeInfo, patchNum?: PatchSetNum) {
+  getRevision(change: ChangeViewChangeInfo, patchNum?: PatchSetNumber) {
     for (const rev of Object.values(change.revisions)) {
       if (rev._number === patchNum) {
         return rev;

diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.ts b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.ts
index 1b98c5d..7c04f7d 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.ts

@@ -36,7 +36,6 @@
   ChangeSubmissionId,
   CommitId,
   NumericChangeId,
-  PatchSetNum,
   PatchSetNumber,
   RepoName,
   ReviewInput,
@@ -138,7 +137,7 @@
         },
       };
       element.changeNum = 42 as NumericChangeId;
-      element.latestPatchNum = 2 as PatchSetNum;
+      element.latestPatchNum = 2 as PatchSetNumber;
       element.account = {
         _account_id: 123 as AccountId,
       };
@@ -529,7 +528,7 @@
           rev2: {...createRevision(), _number: 2 as PatchSetNumber},
         },
       };
-      element.latestPatchNum = 2 as PatchSetNum;
+      element.latestPatchNum = 2 as PatchSetNumber;
 
       queryAndAssert<GrButton>(
         element,
@@ -1808,7 +1807,7 @@
         element.change!.is_private = false;
 
         element.changeNum = 2 as NumericChangeId;
-        element.latestPatchNum = 2 as PatchSetNum;
+        element.latestPatchNum = 2 as PatchSetNumber;
 
         await element.updateComplete;
         await element.reload();
@@ -1862,7 +1861,7 @@
         element.change!.is_private = true;
 
         element.changeNum = 2 as NumericChangeId;
-        element.latestPatchNum = 2 as PatchSetNum;
+        element.latestPatchNum = 2 as PatchSetNumber;
 
         await element.updateComplete;
         await element.reload();
@@ -2331,7 +2330,7 @@
       const reloadStub = sinon.stub(element, 'reload');
       element.changeNum = 123 as NumericChangeId;
       assert.isFalse(reloadStub.called);
-      element.latestPatchNum = 456 as PatchSetNum;
+      element.latestPatchNum = 456 as PatchSetNumber;
       assert.isFalse(reloadStub.called);
     });
 
@@ -2427,7 +2426,7 @@
       setup(async () => {
         cleanup = sinon.stub();
         element.changeNum = 42 as NumericChangeId;
-        element.latestPatchNum = 12 as PatchSetNum;
+        element.latestPatchNum = 12 as PatchSetNumber;
         element.change = {
           ...createChangeViewChange(),
           revisions: createRevisions(element.latestPatchNum as number),
@@ -2695,7 +2694,7 @@
       // set the following properties
       element.change = createChangeViewChange();
       element.changeNum = 42 as NumericChangeId;
-      element.latestPatchNum = 2 as PatchSetNum;
+      element.latestPatchNum = 2 as PatchSetNumber;
 
       stubRestApi('getRepoBranches').returns(Promise.resolve([]));
       await element.updateComplete;

diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts
index e9eed21..5a0f3bb 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts

@@ -1401,7 +1401,6 @@
         .changeNum=${this.changeNum}
         .changeStatus=${this.change?.status}
         .commitNum=${this.commitInfo?.commit}
-        .latestPatchNum=${computeLatestPatchNum(this.allPatchSets)}
         .commitMessage=${this.latestCommitMessage}
         .editPatchsetLoaded=${this.patchRange
           ? hasEditPatchsetLoaded(this.patchRange)