Merge "Fix scrolling comments into view"
diff --git a/java/com/google/gerrit/httpd/raw/IndexPreloadingUtil.java b/java/com/google/gerrit/httpd/raw/IndexPreloadingUtil.java
index 8395d12..fa9a820 100644
--- a/java/com/google/gerrit/httpd/raw/IndexPreloadingUtil.java
+++ b/java/com/google/gerrit/httpd/raw/IndexPreloadingUtil.java
@@ -89,7 +89,10 @@
           .map(query -> query.replaceAll("\\$\\{user}", "self"))
           .collect(toImmutableList());
   public static final ImmutableSet<ListChangesOption> DASHBOARD_OPTIONS =
-      ImmutableSet.of(ListChangesOption.LABELS, ListChangesOption.DETAILED_ACCOUNTS);
+      ImmutableSet.of(
+          ListChangesOption.LABELS,
+          ListChangesOption.DETAILED_ACCOUNTS,
+          ListChangesOption.SUBMIT_REQUIREMENTS);
 
   public static final ImmutableSet<ListChangesOption> CHANGE_DETAIL_OPTIONS =
       ImmutableSet.of(
diff --git a/java/com/google/gerrit/server/project/ProjectConfig.java b/java/com/google/gerrit/server/project/ProjectConfig.java
index 03886a9..4a17b5c 100644
--- a/java/com/google/gerrit/server/project/ProjectConfig.java
+++ b/java/com/google/gerrit/server/project/ProjectConfig.java
@@ -901,7 +901,7 @@
       Config rc, String section, String subsection, String varName, boolean useRange) {
     Permission.Builder perm = Permission.builder(varName);
     loadPermissionRules(rc, section, subsection, varName, perm, useRange);
-    return ImmutableList.copyOf(perm.build().getRules());
+    return perm.build().getRules();
   }
 
   private void loadPermissionRules(
diff --git a/java/com/google/gerrit/server/project/SubmitRequirementsEvaluator.java b/java/com/google/gerrit/server/project/SubmitRequirementsEvaluator.java
index 402bb51..df836e0 100644
--- a/java/com/google/gerrit/server/project/SubmitRequirementsEvaluator.java
+++ b/java/com/google/gerrit/server/project/SubmitRequirementsEvaluator.java
@@ -14,13 +14,13 @@
 
 package com.google.gerrit.server.project;
 
+import com.google.common.collect.ImmutableMap;
 import com.google.gerrit.entities.SubmitRequirement;
 import com.google.gerrit.entities.SubmitRequirementExpression;
 import com.google.gerrit.entities.SubmitRequirementExpressionResult;
 import com.google.gerrit.entities.SubmitRequirementResult;
 import com.google.gerrit.index.query.QueryParseException;
 import com.google.gerrit.server.query.change.ChangeData;
-import java.util.Map;
 
 public interface SubmitRequirementsEvaluator {
   /**
@@ -31,7 +31,7 @@
    * @param includeLegacy if set to true, evaluate legacy {@link
    *     com.google.gerrit.entities.SubmitRecord}s and convert them to submit requirements.
    */
-  Map<SubmitRequirement, SubmitRequirementResult> evaluateAllRequirements(
+  ImmutableMap<SubmitRequirement, SubmitRequirementResult> evaluateAllRequirements(
       ChangeData cd, boolean includeLegacy);
 
   /** Evaluate a single {@link SubmitRequirement} using change data. */
diff --git a/java/com/google/gerrit/server/project/SubmitRequirementsEvaluatorImpl.java b/java/com/google/gerrit/server/project/SubmitRequirementsEvaluatorImpl.java
index 64c9a4c..16645a5 100644
--- a/java/com/google/gerrit/server/project/SubmitRequirementsEvaluatorImpl.java
+++ b/java/com/google/gerrit/server/project/SubmitRequirementsEvaluatorImpl.java
@@ -82,7 +82,7 @@
   }
 
   @Override
-  public Map<SubmitRequirement, SubmitRequirementResult> evaluateAllRequirements(
+  public ImmutableMap<SubmitRequirement, SubmitRequirementResult> evaluateAllRequirements(
       ChangeData cd, boolean includeLegacy) {
     Map<SubmitRequirement, SubmitRequirementResult> projectConfigRequirements = getRequirements(cd);
     Map<SubmitRequirement, SubmitRequirementResult> result = projectConfigRequirements;
diff --git a/plugins/gitiles b/plugins/gitiles
index 97ce60f..a0709a4 160000
--- a/plugins/gitiles
+++ b/plugins/gitiles
@@ -1 +1 @@
-Subproject commit 97ce60f8bb4dbf40dde79cf56db6425c384dabcf
+Subproject commit a0709a402ee1d4fe3921fd81e575ec48a053cc9f
diff --git a/polygerrit-ui/app/api/checks.ts b/polygerrit-ui/app/api/checks.ts
index d1c320f..17b0ba0 100644
--- a/polygerrit-ui/app/api/checks.ts
+++ b/polygerrit-ui/app/api/checks.ts
@@ -97,6 +97,11 @@
   actions?: Action[];
 
   /**
+   * Shown prominently in the change summary below the run chips.
+   */
+  summaryMessage?: string;
+
+  /**
    * Top-level links that are not associated with a specific run or result.
    * Will be shown as icons in the header of the Checks tab.
    */
diff --git a/polygerrit-ui/app/api/reporting.ts b/polygerrit-ui/app/api/reporting.ts
index c3655bb..40474e1 100644
--- a/polygerrit-ui/app/api/reporting.ts
+++ b/polygerrit-ui/app/api/reporting.ts
@@ -18,6 +18,27 @@
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export type EventDetails = any;
 
+export enum Deduping {
+  /**
+   * Only report the event once per session, even if the event details are
+   * different.
+   */
+  EVENT_ONCE_PER_SESSION = 'EVENT_ONCE_PER_SESSION',
+  /**
+   * Only report the event once per change, even if the event details are
+   * different.
+   */
+  EVENT_ONCE_PER_CHANGE = 'EVENT_ONCE_PER_CHANGE',
+  /** Only report these exact event details once per session. */
+  DETAILS_ONCE_PER_SESSION = 'DETAILS_ONCE_PER_SESSION',
+  /** Only report these exact event details once per change. */
+  DETAILS_ONCE_PER_CHANGE = 'DETAILS_ONCE_PER_CHANGE',
+}
+export declare interface ReportingOptions {
+  /** Set this, if you don't want to report *every* time. */
+  deduping?: Deduping;
+}
+
 export declare interface ReportingPluginApi {
   reportInteraction(eventName: string, details?: EventDetails): void;
 
diff --git a/polygerrit-ui/app/constants/reporting.ts b/polygerrit-ui/app/constants/reporting.ts
index 78fffe3..52747b3 100644
--- a/polygerrit-ui/app/constants/reporting.ts
+++ b/polygerrit-ui/app/constants/reporting.ts
@@ -108,4 +108,5 @@
   COMMENT_SAVED = 'comment-saved',
   DISCARD_COMMENT = 'discard-comment',
   COMMENT_DISCARDED = 'comment-discarded',
+  CHECKS_TAB_RENDERED = 'checks-tab-rendered',
 }
diff --git a/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_html.ts b/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_html.ts
index 84cf6d9..b4fa7cc 100644
--- a/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_html.ts
+++ b/polygerrit-ui/app/elements/change-list/gr-dashboard-view/gr-dashboard-view_html.ts
@@ -75,10 +75,10 @@
     ></gr-user-header>
     <h1 class="assistive-tech-only">Dashboard</h1>
     <gr-change-list
-      show-star=""
+      showstar=""
       account="[[account]]"
       preferences="[[preferences]]"
-      selected-index="[[_selectedChangeIndex]]"
+      selectedindex="[[_selectedChangeIndex]]"
       sections="[[_results]]"
       on-selected-index-changed="_handleSelectedIndexChanged"
       on-toggle-star="_handleToggleStar"
diff --git a/polygerrit-ui/app/elements/change/gr-change-summary/gr-change-summary.ts b/polygerrit-ui/app/elements/change/gr-change-summary/gr-change-summary.ts
index c90359e..3298e53 100644
--- a/polygerrit-ui/app/elements/change/gr-change-summary/gr-change-summary.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-summary/gr-change-summary.ts
@@ -405,6 +405,9 @@
   @state()
   actions: Action[] = [];
 
+  @state()
+  messages: string[] = [];
+
   private showAllChips = new Map<RunStatus | Category, boolean>();
 
   private getCommentsModel = resolve(this, commentsModelToken);
@@ -447,6 +450,11 @@
     );
     subscribe(
       this,
+      this.checksModel.topLevelMessagesLatest$,
+      x => (this.messages = x)
+    );
+    subscribe(
+      this,
       this.getCommentsModel().changeComments$,
       x => (this.changeComments = x)
     );
@@ -556,10 +564,18 @@
         .actions #moreMessage {
           display: none;
         }
+        .summaryMessage {
+          line-height: var(--line-height-normal);
+          color: var(--primary-text-color);
+        }
       `,
     ];
   }
 
+  private renderSummaryMessage() {
+    return this.messages.map(m => html`<div class="summaryMessage">${m}</div>`);
+  }
+
   private renderActions() {
     const actions = this.actions ?? [];
     const summaryActions = actions.filter(a => a.summary).slice(0, 2);
@@ -794,7 +810,8 @@
                   class="loadingSpin"
                   ?hidden="${!this.someProvidersAreLoading}"
                 ></span>
-                ${this.renderErrorMessages()}${this.renderChecksLogin()}${this.renderActions()}
+                ${this.renderErrorMessages()} ${this.renderChecksLogin()}
+                ${this.renderSummaryMessage()} ${this.renderActions()}
               </div>
             </td>
           </tr>
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 18eda12..0f19016 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
@@ -2152,29 +2152,28 @@
 
     if (isLocationChange) {
       this._editingCommitMessage = false;
-      const relatedChangesLoaded = coreDataPromise.then(() => {
-        let relatedChangesPromise:
-          | Promise<RelatedChangesInfo | undefined>
-          | undefined;
-        const patchNum = this._computeLatestPatchNum(this._allPatchSets);
-        if (this._change && patchNum) {
-          relatedChangesPromise = this.restApiService
-            .getRelatedChanges(this._change._number, patchNum)
-            .then(response => {
-              if (this._change && response) {
-                this.hasParent = this._calculateHasParent(
-                  this._change.change_id,
-                  response.changes
-                );
-              }
-              return response;
-            });
-        }
-        // TODO: use returned Promise
-        this.getRelatedChangesList()?.reload(relatedChangesPromise);
-      });
-      allDataPromises.push(relatedChangesLoaded);
     }
+    const relatedChangesLoaded = coreDataPromise.then(() => {
+      let relatedChangesPromise:
+        | Promise<RelatedChangesInfo | undefined>
+        | undefined;
+      const patchNum = this._computeLatestPatchNum(this._allPatchSets);
+      if (this._change && patchNum) {
+        relatedChangesPromise = this.restApiService
+          .getRelatedChanges(this._change._number, patchNum)
+          .then(response => {
+            if (this._change && response) {
+              this.hasParent = this._calculateHasParent(
+                this._change.change_id,
+                response.changes
+              );
+            }
+            return response;
+          });
+      }
+      return this.getRelatedChangesList()?.reload(relatedChangesPromise);
+    });
+    allDataPromises.push(relatedChangesLoaded);
 
     Promise.all(allDataPromises).then(() => {
       // Loading of commments data is no longer part of this reporting
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.ts b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.ts
index 4ca593a..c432276 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.ts
@@ -1448,15 +1448,27 @@
     assert.isTrue(recreateSpy.calledOnce);
   });
 
-  test('related changes are not updated after other action', async () => {
-    sinon.stub(element, 'loadData').callsFake(() => Promise.resolve());
+  test('related changes are updated when loadData is called', async () => {
     await flush();
     const relatedChanges = element.shadowRoot!.querySelector(
       '#relatedChanges'
     ) as GrRelatedChangesList;
-    sinon.stub(relatedChanges, 'reload');
+    const reloadStub = sinon.stub(relatedChanges, 'reload');
+    stubRestApi('getMergeable').returns(
+      Promise.resolve({...createMergeable(), mergeable: true})
+    );
+
+    element.params = createAppElementChangeViewParams();
+    element.changeModel.setState({
+      loadingStatus: LoadingStatus.LOADED,
+      change: {
+        ...createChangeViewChange(),
+      },
+    });
+
     await element.loadData(true);
     assert.isFalse(navigateToChangeStub.called);
+    assert.isTrue(reloadStub.called);
   });
 
   test('_computeCopyTextForTitle', () => {
diff --git a/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts b/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
index 4294e3f..38430b0 100644
--- a/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
+++ b/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements.ts
@@ -171,17 +171,17 @@
           </tr>
         </thead>
         <tbody>
-          ${submit_requirements.map(requirement =>
-            this.renderRequirement(requirement)
+          ${submit_requirements.map((requirement, index) =>
+            this.renderRequirement(requirement, index)
           )}
         </tbody>
       </table>
       ${this.disableHovercards
         ? ''
         : submit_requirements.map(
-            requirement => html`
+            (requirement, index) => html`
               <gr-submit-requirement-hovercard
-                for="requirement-${charsOnly(requirement.name)}"
+                for="requirement-${index}-${charsOnly(requirement.name)}"
                 .requirement="${requirement}"
                 .change="${this.change}"
                 .account="${this.account}"
@@ -192,9 +192,9 @@
       ${this.renderTriggerVotes()}`;
   }
 
-  renderRequirement(requirement: SubmitRequirementResultInfo) {
+  renderRequirement(requirement: SubmitRequirementResultInfo, index: number) {
     return html`
-      <tr id="requirement-${charsOnly(requirement.name)}">
+      <tr id="requirement-${index}-${charsOnly(requirement.name)}">
         <td>${this.renderStatus(requirement.status)}</td>
         <td class="name">
           <gr-limited-text
diff --git a/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements_test.ts b/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements_test.ts
index 5a094ef..323c70f 100644
--- a/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements_test.ts
+++ b/polygerrit-ui/app/elements/change/gr-submit-requirements/gr-submit-requirements_test.ts
@@ -85,7 +85,7 @@
         </tr>
       </thead>
       <tbody>
-        <tr id="requirement-Verified">
+        <tr id="requirement-0-Verified">
           <td>
             <iron-icon
               aria-label="satisfied"
@@ -111,7 +111,7 @@
         </tr>
       </tbody>
     </table>
-    <gr-submit-requirement-hovercard for="requirement-Verified">
+    <gr-submit-requirement-hovercard for="requirement-0-Verified">
     </gr-submit-requirement-hovercard>
   `);
   });
diff --git a/polygerrit-ui/app/elements/checks/gr-checks-runs.ts b/polygerrit-ui/app/elements/checks/gr-checks-runs.ts
index 4929b7c..f4bbc5d 100644
--- a/polygerrit-ui/app/elements/checks/gr-checks-runs.ts
+++ b/polygerrit-ui/app/elements/checks/gr-checks-runs.ts
@@ -676,6 +676,7 @@
       [],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -683,6 +684,7 @@
       [],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -690,6 +692,7 @@
       [],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -697,6 +700,7 @@
       [],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -704,6 +708,7 @@
       [],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -711,6 +716,7 @@
       [],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
   }
@@ -721,6 +727,7 @@
       [fakeRun0],
       fakeActions,
       fakeLinks,
+      'ETA: 1 min',
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -728,6 +735,7 @@
       [fakeRun1],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -735,6 +743,7 @@
       [fakeRun2],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -742,6 +751,7 @@
       [fakeRun3],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -749,6 +759,7 @@
       fakeRun4Att,
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     this.checksModel.updateStateSetResults(
@@ -756,6 +767,7 @@
       [fakeRun5],
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
   }
@@ -764,7 +776,8 @@
     plugin: string,
     runs: CheckRun[],
     actions: Action[] = [],
-    links: Link[] = []
+    links: Link[] = [],
+    summaryMessage: string | undefined = undefined
   ) {
     const newRuns = this.runs.includes(runs[0]) ? [] : runs;
     this.checksModel.updateStateSetResults(
@@ -772,6 +785,7 @@
       newRuns,
       actions,
       links,
+      summaryMessage,
       ChecksPatchset.LATEST
     );
   }
@@ -843,7 +857,13 @@
         <gr-button
           link
           @click="${() =>
-            this.toggle('f0', [fakeRun0], fakeActions, fakeLinks)}"
+            this.toggle(
+              'f0',
+              [fakeRun0],
+              fakeActions,
+              fakeLinks,
+              'ETA: 1 min'
+            )}"
           >0</gr-button
         >
         <gr-button link @click="${() => this.toggle('f1', [fakeRun1])}"
diff --git a/polygerrit-ui/app/elements/checks/gr-checks-tab.ts b/polygerrit-ui/app/elements/checks/gr-checks-tab.ts
index a9c30c5..0ffde6f 100644
--- a/polygerrit-ui/app/elements/checks/gr-checks-tab.ts
+++ b/polygerrit-ui/app/elements/checks/gr-checks-tab.ts
@@ -26,6 +26,8 @@
 import {ChecksTabState} from '../../types/events';
 import {getAppContext} from '../../services/app-context';
 import {subscribe} from '../lit/subscription-controller';
+import {Deduping} from '../../api/reporting';
+import {Interaction} from '../../constants/reporting';
 
 /**
  * The "Checks" tab on the Gerrit change page. Gets its data from plugins that
@@ -65,6 +67,8 @@
 
   private readonly checksModel = getAppContext().checksModel;
 
+  private readonly reporting = getAppContext().reportingService;
+
   constructor() {
     super();
     subscribe(
@@ -113,6 +117,11 @@
   }
 
   override render() {
+    this.reporting.reportInteraction(
+      Interaction.CHECKS_TAB_RENDERED,
+      this.tabState,
+      {deduping: Deduping.DETAILS_ONCE_PER_CHANGE}
+    );
     return html`
       <div class="container">
         <gr-checks-runs
diff --git a/polygerrit-ui/app/services/checks/checks-model.ts b/polygerrit-ui/app/services/checks/checks-model.ts
index 2bdee51..e58e594 100644
--- a/polygerrit-ui/app/services/checks/checks-model.ts
+++ b/polygerrit-ui/app/services/checks/checks-model.ts
@@ -122,6 +122,7 @@
   errorMessage?: string;
   /** Presence of loginCallback implicitly means that the provider is in NOT_LOGGED_IN state. */
   loginCallback?: () => void;
+  summaryMessage?: string;
   runs: CheckRun[];
   actions: Action[];
   links: Link[];
@@ -239,6 +240,13 @@
     )
   );
 
+  public topLevelMessagesLatest$ = select(this.checksLatest$, state => {
+    const messages = Object.values(state).map(
+      providerState => providerState.summaryMessage
+    );
+    return messages.filter(m => m !== undefined) as string[];
+  });
+
   public topLevelActionsSelected$ = select(this.checksSelected$, state =>
     Object.values(state).reduce(
       (allActions: Action[], providerState: ChecksProviderState) => [
@@ -444,6 +452,7 @@
     runs: CheckRunApi[],
     actions: Action[] = [],
     links: Link[] = [],
+    summaryMessage: string | undefined,
     patchset: ChecksPatchset
   ) {
     const attemptMap = createAttemptMap(runs);
@@ -483,6 +492,7 @@
       }),
       actions: [...actions],
       links: [...links],
+      summaryMessage,
     };
     this.subject$.next(nextState);
   }
@@ -701,6 +711,7 @@
                 response.runs ?? [],
                 response.actions ?? [],
                 response.links ?? [],
+                response.summaryMessage,
                 patchset
               );
               break;
diff --git a/polygerrit-ui/app/services/checks/checks-model_test.ts b/polygerrit-ui/app/services/checks/checks-model_test.ts
index 1bb0f8a..c2588fe 100644
--- a/polygerrit-ui/app/services/checks/checks-model_test.ts
+++ b/polygerrit-ui/app/services/checks/checks-model_test.ts
@@ -120,6 +120,7 @@
       RUNS,
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     assert.isFalse(current.loading);
@@ -132,6 +133,7 @@
       RUNS,
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     assert.isFalse(current.loading);
@@ -144,6 +146,7 @@
       RUNS,
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     assert.lengthOf(current.runs, 1);
@@ -156,6 +159,7 @@
       RUNS,
       [],
       [],
+      undefined,
       ChecksPatchset.LATEST
     );
     assert.equal(
diff --git a/polygerrit-ui/app/services/gr-reporting/gr-reporting.ts b/polygerrit-ui/app/services/gr-reporting/gr-reporting.ts
index 518716b..0da8b4c 100644
--- a/polygerrit-ui/app/services/gr-reporting/gr-reporting.ts
+++ b/polygerrit-ui/app/services/gr-reporting/gr-reporting.ts
@@ -16,7 +16,7 @@
  */
 import {Finalizable} from '../registry';
 import {NumericChangeId} from '../../types/common';
-import {EventDetails} from '../../api/reporting';
+import {EventDetails, ReportingOptions} from '../../api/reporting';
 import {PluginApi} from '../../api/plugin';
 import {
   Execution,
@@ -113,7 +113,8 @@
   ): void;
   reportInteraction(
     eventName: string | Interaction,
-    details?: EventDetails
+    details?: EventDetails,
+    options?: ReportingOptions
   ): void;
   reportErrorDialog(message: string): void;
   setRepoName(repoName: string): void;
diff --git a/polygerrit-ui/app/services/gr-reporting/gr-reporting_impl.ts b/polygerrit-ui/app/services/gr-reporting/gr-reporting_impl.ts
index a01e9db..bf10da9 100644
--- a/polygerrit-ui/app/services/gr-reporting/gr-reporting_impl.ts
+++ b/polygerrit-ui/app/services/gr-reporting/gr-reporting_impl.ts
@@ -18,7 +18,7 @@
 import {EventValue, ReportingService, Timer} from './gr-reporting';
 import {hasOwnProperty} from '../../utils/common-util';
 import {NumericChangeId} from '../../types/common';
-import {EventDetails} from '../../api/reporting';
+import {Deduping, EventDetails, ReportingOptions} from '../../api/reporting';
 import {PluginApi} from '../../api/plugin';
 import {Finalizable} from '../registry';
 import {
@@ -285,10 +285,10 @@
   private slowRpcList: SlowRpcCall[] = [];
 
   /**
-   * Keeps track of which ids were already reported to have been executed.
-   * Execution ids should only be reported once per session.
+   * Keeps track of which ids were already reported for events that should only
+   * be reported once per session.
    */
-  private executionReported = new Set<string>();
+  private reportedIds = new Set<string>();
 
   public readonly hiddenDurationTimer = new HiddenDurationTimer();
 
@@ -815,7 +815,43 @@
     );
   }
 
-  reportInteraction(eventName: string | Interaction, details: EventDetails) {
+  /**
+   * Returns true when the event was deduped and thus should not be reported.
+   */
+  _dedup(
+    eventName: string | Interaction,
+    details: EventDetails,
+    deduping?: Deduping
+  ): boolean {
+    if (!deduping) return false;
+    let id = '';
+    switch (deduping) {
+      case Deduping.DETAILS_ONCE_PER_CHANGE:
+        id = `${eventName}-${this.reportChangeId}-${JSON.stringify(details)}`;
+        break;
+      case Deduping.DETAILS_ONCE_PER_SESSION:
+        id = `${eventName}-${JSON.stringify(details)}`;
+        break;
+      case Deduping.EVENT_ONCE_PER_CHANGE:
+        id = `${eventName}-${this.reportChangeId}`;
+        break;
+      case Deduping.EVENT_ONCE_PER_SESSION:
+        id = `${eventName}`;
+        break;
+      default:
+        throw new Error(`Invalid 'deduping' option '${deduping}'.`);
+    }
+    if (this.reportedIds.has(id)) return true;
+    this.reportedIds.add(id);
+    return false;
+  }
+
+  reportInteraction(
+    eventName: string | Interaction,
+    details: EventDetails,
+    options?: ReportingOptions
+  ) {
+    if (this._dedup(eventName, details, options?.deduping)) return;
     this.reporter(
       INTERACTION.TYPE,
       INTERACTION.CATEGORY.DEFAULT,
@@ -827,9 +863,7 @@
   }
 
   reportExecution(name: Execution, details?: EventDetails) {
-    const id = `${name}${JSON.stringify(details)}`;
-    if (this.executionReported.has(id)) return;
-    this.executionReported.add(id);
+    if (this._dedup(name, details, Deduping.DETAILS_ONCE_PER_SESSION)) return;
     this.reporter(
       LIFECYCLE.TYPE,
       LIFECYCLE.CATEGORY.EXECUTION,
diff --git a/polygerrit-ui/app/services/gr-reporting/gr-reporting_test.js b/polygerrit-ui/app/services/gr-reporting/gr-reporting_test.js
index 8068dc00..990a5c8 100644
--- a/polygerrit-ui/app/services/gr-reporting/gr-reporting_test.js
+++ b/polygerrit-ui/app/services/gr-reporting/gr-reporting_test.js
@@ -18,6 +18,7 @@
 import '../../test/common-test-setup-karma.js';
 import {GrReporting, DEFAULT_STARTUP_TIMERS, initErrorReporter} from './gr-reporting_impl.js';
 import {getAppContext} from '../app-context.js';
+import {Deduping} from '../../api/reporting.js';
 suite('gr-reporting tests', () => {
   let service;
 
@@ -347,6 +348,44 @@
     assert.equal(dispatchStub.getCall(2).args[0].detail.eventStart, 42);
   });
 
+  test('dedup', () => {
+    assert.isFalse(service._dedup('a', undefined, undefined));
+    assert.isFalse(service._dedup('a', undefined, undefined));
+
+    let deduping = Deduping.EVENT_ONCE_PER_SESSION;
+    assert.isFalse(service._dedup('b', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('b', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('b', {x: 'bar'}, deduping));
+
+    deduping = Deduping.DETAILS_ONCE_PER_SESSION;
+    assert.isFalse(service._dedup('c', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('c', {x: 'foo'}, deduping));
+    assert.isFalse(service._dedup('c', {x: 'bar'}, deduping));
+    assert.isTrue(service._dedup('c', {x: 'bar'}, deduping));
+
+    deduping = Deduping.EVENT_ONCE_PER_CHANGE;
+    service.setChangeId(1);
+    assert.isFalse(service._dedup('d', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('d', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('d', {x: 'bar'}, deduping));
+    service.setChangeId(2);
+    assert.isFalse(service._dedup('d', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('d', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('d', {x: 'bar'}, deduping));
+
+    deduping = Deduping.DETAILS_ONCE_PER_CHANGE;
+    service.setChangeId(1);
+    assert.isFalse(service._dedup('e', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('e', {x: 'foo'}, deduping));
+    assert.isFalse(service._dedup('e', {x: 'bar'}, deduping));
+    assert.isTrue(service._dedup('e', {x: 'bar'}, deduping));
+    service.setChangeId(2);
+    assert.isFalse(service._dedup('e', {x: 'foo'}, deduping));
+    assert.isTrue(service._dedup('e', {x: 'foo'}, deduping));
+    assert.isFalse(service._dedup('e', {x: 'bar'}, deduping));
+    assert.isTrue(service._dedup('e', {x: 'bar'}, deduping));
+  });
+
   suite('plugins', () => {
     setup(() => {
       service.reporter.restore();