Repository: PrairieLearn/PrairieLearn
Pull request #11947: Display access rule comments
Author: login: mylesw27
Created: 2025-05-09T16:28:09Z | Merged: 2025-05-15T20:19:18Z

This will allow instructors to see comments on access rules from their JSON files. This uses the newly added JSON comment columns to render the access rules for course instances and assessments in the access rules tables.

![Screenshot 2025-05-09 at 9 23 22 AM](https://github.com/user-attachments/assets/a0346687-5fe2-4862-9360-c6348d637b30)
![Screenshot 2025-05-09 at 9 25 16 AM](https://github.com/user-attachments/assets/04784c86-d04f-42b9-b908-834e637b4108)
![Screenshot 2025-05-09 at 9 24 57 AM](https://github.com/user-attachments/assets/1f4b38a1-feda-4885-acca-22f0333fc05d)



Diff:
diff --git a/apps/prairielearn/src/components/CommentPopover.html.ts b/apps/prairielearn/src/components/CommentPopover.html.ts
new file mode 100644
index 00000000000..019fbf8a75d
--- /dev/null
+++ b/apps/prairielearn/src/components/CommentPopover.html.ts
@@ -0,0 +1,25 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+import { isRenderableComment } from '../lib/comments.js';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  if (!isRenderableComment(comment)) {
+    return '';
+  }
+  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
+
+  return html`
+    <button
+      type="button"
+      class="btn btn-xs btn-ghost"
+      aria-label="Access rule comment"
+      data-bs-toggle="popover"
+      data-bs-container="body"
+      data-bs-placement="auto"
+      data-bs-html="true"
+      data-bs-content="${escapeHtml(html`${content}`)}"
+    >
+      <i class="fa fa-comment"></i>
+    </button>
+  `;
+}
diff --git a/apps/prairielearn/src/lib/comments.test.ts b/apps/prairielearn/src/lib/comments.test.ts
new file mode 100644
index 00000000000..58723e7b96e
--- /dev/null
+++ b/apps/prairielearn/src/lib/comments.test.ts
@@ -0,0 +1,37 @@
+import { assert } from 'chai';
+
+import { isRenderableComment } from '../lib/comments.js';
+
+describe('isRenderableComment', function () {
+  it('should return true for non-empty string', () => {
+    assert.isTrue(isRenderableComment('Test comment'));
+  });
+
+  it('should return true for non-empty array', () => {
+    assert.isTrue(isRenderableComment(['test', 'comment']));
+  });
+
+  it('should return true for non-empty object', () => {
+    assert.isTrue(isRenderableComment({ comment: 'test' }));
+  });
+
+  it('should return false for null', () => {
+    assert.isFalse(isRenderableComment(null));
+  });
+
+  it('should return false for empty string', () => {
+    assert.isFalse(isRenderableComment(''));
+  });
+
+  it('should return false for empty array', () => {
+    assert.isFalse(isRenderableComment([]));
+  });
+
+  it('should return false for empty object', () => {
+    assert.isFalse(isRenderableComment({}));
+  });
+
+  it('should return false for whitespace string', () => {
+    assert.isFalse(isRenderableComment('   '));
+  });
+});
diff --git a/apps/prairielearn/src/lib/comments.ts b/apps/prairielearn/src/lib/comments.ts
new file mode 100644
index 00000000000..07e72184cdc
--- /dev/null
+++ b/apps/prairielearn/src/lib/comments.ts
@@ -0,0 +1,16 @@
+/**
+ * Returns a boolean indicating that the comment is not null or empty and should be rendered.
+ *
+ * @param comment - the comment being assessed
+ */
+export function isRenderableComment(comment: string | string[] | Record<string, any> | null) {
+  if (
+    !comment ||
+    (typeof comment === 'string' && comment.trim() === '') ||
+    (Array.isArray(comment) && comment.length === 0) ||
+    (typeof comment === 'object' && Object.keys(comment).length === 0)
+  ) {
+    return false;
+  }
+  return true;
+}
diff --git a/apps/prairielearn/src/lib/db-types.ts b/apps/prairielearn/src/lib/db-types.ts
index 2d8e0ee7b0a..9de723634a8 100644
--- a/apps/prairielearn/src/lib/db-types.ts
+++ b/apps/prairielearn/src/lib/db-types.ts
@@ -20,7 +20,7 @@ export const AssessmentsFormatForQuestionSchema = z.array(
   }),
 );
 
-const JsonCommentSchema = z.union([z.string(), z.array(z.any()), z.record(z.any())]);
+export const JsonCommentSchema = z.union([z.string(), z.array(z.any()), z.record(z.any())]);
 
 // *******************************************************************************
 // Enum schemas. These should be alphabetized by their corresponding enum name.
diff --git a/apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts b/apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
index 7bac8133515..692871aab20 100644
--- a/apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
+++ b/apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
@@ -2,9 +2,12 @@ import { z } from 'zod';
 
 import { html } from '@prairielearn/html';
 
+import { CommentPopover } from '../../components/CommentPopover.html.js';
 import { PageLayout } from '../../components/PageLayout.html.js';
 import { AssessmentSyncErrorsAndWarnings } from '../../components/SyncErrorsAndWarnings.html.js';
+import { isRenderableComment } from '../../lib/comments.js';
 import { config } from '../../lib/config.js';
+import { JsonCommentSchema } from '../../lib/db-types.js';
 
 export const AssessmentAccessRulesSchema = z.object({
   mode: z.string(),
@@ -20,6 +23,7 @@ export const AssessmentAccessRulesSchema = z.object({
   pt_exam_id: z.string().nullable(),
   pt_exam_name: z.string().nullable(),
   active: z.string(),
+  comment: JsonCommentSchema.nullable(),
 });
 type AssessmentAccessRules = z.infer<typeof AssessmentAccessRulesSchema>;
 
@@ -30,6 +34,7 @@ export function InstructorAssessmentAccess({
   resLocals: Record<string, any>;
   accessRules: AssessmentAccessRules[];
 }) {
+  const showComments = accessRules.some((access_rule) => isRenderableComment(access_rule.comment));
   return PageLayout({
     resLocals,
     pageTitle: 'Access',
@@ -59,6 +64,9 @@ export function InstructorAssessmentAccess({
           <table class="table table-sm table-hover" aria-label="Access rules">
             <thead>
               <tr>
+                ${showComments
+                  ? html`<th style="width: 1%"><span class="visually-hidden">Comments</span></th>`
+                  : ''}
                 <th>Mode</th>
                 <th>UIDs</th>
                 <th>Start date</th>
@@ -81,6 +89,7 @@ export function InstructorAssessmentAccess({
                 // student data. See https://github.com/PrairieLearn/PrairieLearn/issues/3342
                 return html`
                   <tr>
+                    ${showComments ? html`<td>${CommentPopover(access_rule.comment)}</td>` : ''}
                     <td>${access_rule.mode}</td>
                     <td>
                       ${access_rule.uids === '—' ||
diff --git a/apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.sql b/apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.sql
index c77b05865ac..99da80103db 100644
--- a/apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.sql
+++ b/apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.sql
@@ -33,6 +33,7 @@ SELECT
   pt_c.name AS pt_course_name,
   pt_x.id AS pt_exam_id,
   pt_x.name AS pt_exam_name,
+  aar.json_comment AS comment,
   CASE
     WHEN aar.active THEN 'True'
     ELSE 'False'
diff --git a/apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts b/apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts
index 3373b27a00b..b50e48f0b6b 100644
--- a/apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts
+++ b/apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts
@@ -1,8 +1,10 @@
 import { formatDate } from '@prairielearn/formatter';
 import { html } from '@prairielearn/html';
 
+import { CommentPopover } from '../../components/CommentPopover.html.js';
 import { PageLayout } from '../../components/PageLayout.html.js';
 import { CourseInstanceSyncErrorsAndWarnings } from '../../components/SyncErrorsAndWarnings.html.js';
+import { isRenderableComment } from '../../lib/comments.js';
 import { type CourseInstanceAccessRule } from '../../lib/db-types.js';
 
 export function InstructorInstanceAdminAccess({
@@ -13,6 +15,9 @@ export function InstructorInstanceAdminAccess({
   accessRules: CourseInstanceAccessRule[];
 }) {
   const { authz_data, course_instance } = resLocals;
+  const showComments = accessRules.some((access_rule) =>
+    isRenderableComment(access_rule.json_comment),
+  );
 
   return PageLayout({
     resLocals,
@@ -41,6 +46,9 @@ export function InstructorInstanceAdminAccess({
           <table class="table table-sm table-hover" aria-label="Access rules">
             <thead>
               <tr>
+                ${showComments
+                  ? html`<th style="width: 1%"><span class="visually-hidden">Comments</span></th>`
+                  : ''}
                 <th>UIDs</th>
                 <th>Start date</th>
                 <th>End date</th>
@@ -53,6 +61,7 @@ export function InstructorInstanceAdminAccess({
                   accessRule,
                   timeZone: course_instance.display_timezone,
                   hasCourseInstancePermissionView: authz_data.has_course_instance_permission_view,
+                  showComments,
                 }),
               )}
             </tbody>
@@ -67,13 +76,16 @@ function AccessRuleRow({
   accessRule,
   timeZone,
   hasCourseInstancePermissionView,
+  showComments,
 }: {
   accessRule: CourseInstanceAccessRule;
   timeZone: string;
   hasCourseInstancePermissionView: boolean;
+  showComments: boolean;
 }) {
   return html`
     <tr>
+      ${showComments ? html`<td>${CommentPopover(accessRule.json_comment)}</td>` : ''}
       <td>
         ${accessRule.uids == null
           ? html`&mdash;`


Reviews:
user: login: coderabbitai[bot]
body: **Actionable comments posted: 2**

<details>
<summary>🧹 Nitpick comments (3)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (1)</summary><blockquote>

`3-3`: **Consider expanding the comment parameter type**

The component accepts `string | null` as the comment parameter type, but the JsonCommentSchema also includes arrays and objects.


```diff
-export function CommentPopover(comment: string | null) {
+export function CommentPopover(comment: string | null | any[] | Record<string, any>) {
```

This would better align with the JsonCommentSchema type definition and ensure the component can handle all possible comment formats.

</blockquote></details>
<details>
<summary>apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts (1)</summary><blockquote>

`65-65`: **Consider adding descriptive header for comment column**

The empty header for the comment column provides no context to users about what the column represents.


```diff
-                <th></th>
+                <th aria-label="Comments">
+                  <span title="Access rule comments">
+                    <i class="fa fa-comment"></i>
+                  </span>
+                </th>
```

This would improve accessibility and provide a visual indicator of the column's purpose.

</blockquote></details>
<details>
<summary>apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts (1)</summary><blockquote>

`45-45`: **Consider adding an accessible header for the comment column.**

The empty table header `<th></th>` could cause issues for screen readers. Consider adding a descriptive title or at least an `aria-label` for better accessibility.

```diff
- <th></th>
+ <th aria-label="Comments"></th>
```

</blockquote></details>

</blockquote></details>

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<summary>📒 Files selected for processing (5)</summary>

* `apps/prairielearn/src/components/CommentPopover.html.ts` (1 hunks)
* `apps/prairielearn/src/lib/db-types.ts` (1 hunks)
* `apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts` (4 hunks)
* `apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.sql` (1 hunks)
* `apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts` (3 hunks)

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<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (3)</summary>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (1)</summary><blockquote>

<details>
<summary>packages/html/src/index.ts (1)</summary>

* `html` (74-76)

</details>

</blockquote></details>
<details>
<summary>apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts (1)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (1)</summary>

* `CommentPopover` (3-16)

</details>

</blockquote></details>
<details>
<summary>apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts (2)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/lib/db-types.ts (1)</summary>

* `JsonCommentSchema` (23-23)

</details>
<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (1)</summary>

* `CommentPopover` (3-16)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (4)</summary>

* GitHub Check: build-core-images / build-images (ubuntu-24.04-arm)
* GitHub Check: build-core-images / build-images (ubuntu-24.04)
* GitHub Check: test-prairielearn
* GitHub Check: native-checks-js

</details>

<details>
<summary>🔇 Additional comments (7)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/lib/db-types.ts (1)</summary>

`23-23`: **Good change: JsonCommentSchema is now exportable**

Making the JsonCommentSchema exportable enables consistent typing of comment data across multiple components, ensuring type safety throughout the application.

</details>
<details>
<summary>apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.sql (1)</summary>

`36-36`: **Good addition of comment field to query result**

Adding the json_comment field to the query result set makes the comments available to the UI layer, which is necessary for the new comment display feature.

</details>
<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (1)</summary>

`1-16`: **Well-designed reusable component for comment display**

The CommentPopover component is a clean and reusable implementation that encapsulates the UI for displaying comments in a consistent way across the application.


This component correctly implements Bootstrap's popover functionality and follows good separation of concerns by isolating the comment display logic.

</details>
<details>
<summary>apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts (2)</summary>

`5-5`: **Good imports for new functionality**

The addition of the CommentPopover component and JsonCommentSchema imports provides the necessary dependencies for the comment display feature.



Also applies to: 9-9

---

`25-25`: **Schema properly extended with nullable comment field**

The AssessmentAccessRulesSchema has been correctly extended with a nullable comment field using the JsonCommentSchema type.

</details>
<details>
<summary>apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts (2)</summary>

`7-7`: **Good addition of the CommentPopover component import.**

The import correctly brings in the necessary component for displaying comments in a popover UI.

---

`79-79`: **Verify type safety for json_comment handling.**

The code assumes `accessRule.json_comment` can be safely converted to a string with `.toString()`. If `json_comment` could be `null` or `undefined`, this might cause runtime errors since you're only checking if it exists before calling `.toString()`.

```diff
- <td>${accessRule.json_comment ? CommentPopover(accessRule.json_comment.toString()) : ''}</td>
+ <td>${accessRule.json_comment != null ? CommentPopover(String(accessRule.json_comment)) : ''}</td>
```

This change provides better null checking and uses `String()` which safely handles a wider range of input types.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-09T16:31:07Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

<details>
<summary>♻️ Duplicate comments (1)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (1)</summary><blockquote>

`21-21`: **Ensure proper comment serialization.**

When a comment is not a string (could be an array or object), it should be properly serialized before being used in the popover content.

</blockquote></details>

</blockquote></details>

<details>
<summary>🧹 Nitpick comments (2)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (2)</summary><blockquote>

`1-1`: **Clean up unused imports and maintain alphabetical order.**

The imports `HtmlSafeString` and `unsafeHtml` are defined but never used in this file. Additionally, the imports should be alphabetically sorted according to your linting rules.

```diff
-import { escapeHtml, html, HtmlSafeString, unsafeHtml } from '@prairielearn/html';
+import { escapeHtml, html } from '@prairielearn/html';
```

<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 GitHub Check: native-checks-js</summary>

[failure] 1-1: 
'unsafeHtml' is defined but never used                                           

---

[failure] 1-1: 
'HtmlSafeString' is defined but never used                                       

---

[failure] 1-1: 
Member 'HtmlSafeString' of the import declaration should be sorted alphabetically

</details>

</details>

---

`13-25`: **Add accessibility attributes to the comment button.**

The button lacks accessibility attributes to describe its purpose to screen reader users.

```diff
  <button
    type="button"
    class="btn btn-xs btn-ghost"
    data-bs-toggle="popover"
    data-bs-container="body"
    data-bs-placement="auto"
    data-bs-html="true"
    data-bs-content="${escapeHtml(html`${content}`)}"
+   aria-label="View comment"
  >
    <i class="fa fa-comment"></i>
  </button>
```

</blockquote></details>

</blockquote></details>

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<details>
<summary>📒 Files selected for processing (3)</summary>

* `apps/prairielearn/src/components/CommentPopover.html.ts` (1 hunks)
* `apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts` (4 hunks)
* `apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts` (3 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (2)</summary>

* apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts
* apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts

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<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (2)</summary><blockquote>

<details>
<summary>apps/prairielearn/assets/scripts/instructorGradebookClient.ts (1)</summary>

* `content` (180-252)

</details>
<details>
<summary>packages/html/src/index.ts (2)</summary>

* `html` (74-76)
* `escapeHtml` (83-85)

</details>

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<summary>🪛 GitHub Check: native-checks-js</summary>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts</summary>

[failure] 1-1: 
'unsafeHtml' is defined but never used                                           

---

[failure] 1-1: 
'HtmlSafeString' is defined but never used                                       

---

[failure] 1-1: 
Member 'HtmlSafeString' of the import declaration should be sorted alphabetically

</details>

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* GitHub Check: build-core-images / build-images (ubuntu-24.04-arm)
* GitHub Check: build-core-images / build-images (ubuntu-24.04)
* GitHub Check: test-prairielearn

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<details>
<summary>🔇 Additional comments (1)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (1)</summary>

`3-11`: **LGTM! Good handling of different comment types.**

The function appropriately handles various comment data types (string, array, object, null) and correctly formats them for display.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-13T20:50:28Z
user: login: nwalters512
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-14T16:49:10Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-14T22:56:12Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-14T22:56:32Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-14T22:58:58Z
user: login: nwalters512
body: My main remaining concerns are the unconventional ways we're checking for "empty" comments.
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-14T23:57:56Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 2**

<details>
<summary>♻️ Duplicate comments (1)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (1)</summary><blockquote>

`8-8`: **Use a more conventional method to check for an empty array.**

Checking `comment.toString() === '[]'` is an unconventional way to determine if an array is empty.

```diff
-    (Array.isArray(comment) && comment.toString() === '[]') ||
+    (Array.isArray(comment) && comment.length === 0) ||
```

</blockquote></details>

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<summary>🪛 Biome (1.9.4)</summary>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts</summary>

[error] 14-14: Shouldn't redeclare 'content'. Consider to delete it or rename it.

'content' is defined here:


(lint/suspicious/noRedeclare)

</details>

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<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts</summary>

[error] 4-4: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

---

[error] 14-14: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

</details>

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<summary>🪛 GitHub Actions: Images</summary>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts</summary>

[error] 4-4: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

---

[error] 14-14: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

</details>

</details>

</details>

<details>
<summary>🔇 Additional comments (2)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/components/CommentPopover.html.ts (2)</summary>

`17-28`: **Well-implemented button with proper accessibility and security measures.**

The button implementation includes:
- Proper accessibility with the `aria-label` attribute
- Security through HTML escaping to prevent XSS attacks
- Appropriate Bootstrap popover configuration

---

`3-30`: **Well-designed component for displaying comment popovers.**

The overall implementation of the `CommentPopover` component is solid:
- It handles different types of comments (string, array, object, null)
- It properly escapes HTML content for security
- It has good accessibility features
- It returns an empty string when there's no meaningful comment to display
- The conditional rendering approach is appropriate

Once the variable redeclaration issue is fixed, this component will provide a clean, reusable way to display comments for access rules.

<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 Biome (1.9.4)</summary>

[error] 14-14: Shouldn't redeclare 'content'. Consider to delete it or rename it.

'content' is defined here:


(lint/suspicious/noRedeclare)

</details>
<details>
<summary>🪛 GitHub Actions: CI</summary>

[error] 4-4: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

---

[error] 14-14: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

</details>
<details>
<summary>🪛 GitHub Actions: Images</summary>

[error] 4-4: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

---

[error] 14-14: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

</details>

</details>

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:11:37Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:42:48Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

<details>
<summary>🧹 Nitpick comments (2)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/lib/comments.ts (2)</summary><blockquote>

`1-11`: **Consider adding TypeScript type annotations to improve type safety**

The utility function `isRenderableComment` looks good functionally, but would benefit from TypeScript type annotations for the `comment` parameter and return type. This would improve type safety, especially since the function handles multiple data types.


Consider adding proper type annotations:

```diff
-export function isRenderableComment(comment) {
+export function isRenderableComment(comment: unknown): boolean {
```

Additionally, consider adding JSDoc documentation to explain the function's purpose:

```typescript
/**
 * Determines if a comment value should be rendered in the UI.
 * @param comment - The comment value to check
 * @returns true if the comment should be rendered, false otherwise
 */
export function isRenderableComment(comment: unknown): boolean {
  // function body...
}
```

---

`6-6`: **Be more specific with object type checking**

The check for empty objects is correct, but could be more specific to distinguish between plain objects and other object types (like Date, RegExp, etc.).


Consider using a more specific check for plain objects:

```diff
-(typeof comment === 'object' && Object.keys(comment).length === 0)
+(comment !== null && Object.prototype.toString.call(comment) === '[object Object]' && Object.keys(comment).length === 0)
```

This ensures you're only checking plain objects and not other JavaScript objects.

</blockquote></details>

</blockquote></details>

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<details>
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Reviewing files that changed from the base of the PR and between 5c913b579e75775a7d588eaf3ee47a2a45916ae9 and 6fc8f94b6b7cfde534fa1887c6195440cbb5c818.

</details>

<details>
<summary>📒 Files selected for processing (4)</summary>

* `apps/prairielearn/src/components/CommentPopover.html.ts` (1 hunks)
* `apps/prairielearn/src/lib/comments.ts` (1 hunks)
* `apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts` (5 hunks)
* `apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts` (5 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (3)</summary>

* apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
* apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts
* apps/prairielearn/src/components/CommentPopover.html.ts

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* GitHub Check: build-core-images / build-images (ubuntu-24.04-arm)
* GitHub Check: build-core-images / build-images (ubuntu-24.04)
* GitHub Check: test-prairielearn
* GitHub Check: native-checks-js

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<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:43:29Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:46:14Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:46:57Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:47:02Z
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state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:47:23Z
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state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:48:15Z
user: login: nwalters512
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:52:42Z
user: login: nwalters512
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:53:36Z
user: login: nwalters512
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:53:54Z
user: login: coderabbitai[bot]
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:55:19Z
user: login: nwalters512
body: No blockers! Tested locally and this is working well 👍 
state: APPROVED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T17:59:09Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T18:23:20Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

<details>
<summary>🧹 Nitpick comments (1)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/tests/comments.test.ts (1)</summary><blockquote>

`1-3`: **Add an empty line between import groups.**

In accordance with the static analysis hint, consider adding an empty line between the external library import (chai) and the internal module import (comments).

```diff
import { assert } from 'chai';
+
import { isRenderableComment } from '../lib/comments.js';
```

<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 GitHub Check: native-checks-js</summary>

[failure] 1-1: 
There should be at least one empty line between import groups

</details>

</details>

</blockquote></details>

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<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 6fc8f94b6b7cfde534fa1887c6195440cbb5c818 and 2e19053eb792d55be58d106aedfa6a9ba6020601.

</details>

<details>
<summary>📒 Files selected for processing (4)</summary>

* `apps/prairielearn/src/lib/comments.ts` (1 hunks)
* `apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts` (5 hunks)
* `apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts` (5 hunks)
* `apps/prairielearn/src/tests/comments.test.ts` (1 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (3)</summary>

* apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
* apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts
* apps/prairielearn/src/lib/comments.ts

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>apps/prairielearn/src/tests/comments.test.ts (1)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/lib/comments.ts (1)</summary>

* `isRenderableComment` (7-17)

</details>

</blockquote></details>

</details><details>
<summary>🪛 GitHub Check: native-checks-js</summary>

<details>
<summary>apps/prairielearn/src/tests/comments.test.ts</summary>

[failure] 1-1: 
There should be at least one empty line between import groups

</details>

</details>

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (3)</summary>

* GitHub Check: build-core-images / build-images (ubuntu-24.04-arm)
* GitHub Check: build-core-images / build-images (ubuntu-24.04)
* GitHub Check: test-prairielearn

</details>

<details>
<summary>🔇 Additional comments (1)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/tests/comments.test.ts (1)</summary>

`4-36`: **Test cases are well-structured and comprehensive.**

The test suite effectively covers all branches of the `isRenderableComment` function with clear test cases for both positive and negative scenarios. The test descriptions are descriptive and accurately reflect what is being tested.

Key areas covered:
- Positive cases: non-empty strings, arrays, and objects
- Negative cases: null, empty strings/arrays/objects, and whitespace-only strings

This aligns perfectly with the implementation of the function in `comments.ts`.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T18:23:41Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T18:23:57Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T18:24:22Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T18:24:36Z
user: login: nwalters512
body: Aaaalmost there, just a few more notes!
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T19:27:45Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T19:57:26Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T19:58:05Z
user: login: mylesw27
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T19:58:13Z
user: login: nwalters512
state: APPROVED
author_association: CONTRIBUTOR
submitted_at: 2025-05-15T20:04:19Z

Review comments:
diff_hunk: @@ -0,0 +1,16 @@
+import { html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | null) {
+  return html`
+    <button
+      type="button"
+      class="btn btn-xs btn-ghost"
+      data-bs-toggle="popover"
+      data-bs-container="body"
+      data-bs-placement="auto"
+      data-bs-content="${comment}"
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: coderabbitai[bot]
body: _🛠️ Refactor suggestion_

**Ensure proper comment serialization**

When a comment is not a string (could be an array or object), it should be properly serialized before being used in the popover content.


```diff
-      data-bs-content="${comment}"
+      data-bs-content="${typeof comment === 'string' ? comment : JSON.stringify(comment)}"
```

Without this change, non-string comments might not display correctly in the popover.


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
      data-bs-content="${typeof comment === 'string' ? comment : JSON.stringify(comment)}"
`````

</details>

<!-- suggestion_end -->

<!-- This is an auto-generated comment by CodeRabbit -->

✅ Addressed in commit 4fed031
created_at: 2025-05-09T16:31:06Z
author_association: CONTRIBUTOR
diff_hunk: @@ -81,6 +85,9 @@ export function InstructorAssessmentAccess({
                 // student data. See https://github.com/PrairieLearn/PrairieLearn/issues/3342
                 return html`
                   <tr>
+                    <td>
+                      ${access_rule.comment ? CommentPopover(access_rule.comment.toString()) : ''}
+                    </td>
path: apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
user: login: coderabbitai[bot]
body: _🛠️ Refactor suggestion_

**Fix potential object-to-string conversion issue**

The current implementation directly calls toString() on the comment, which might not handle complex objects or arrays properly.


```diff
-                      ${access_rule.comment ? CommentPopover(access_rule.comment.toString()) : ''}
+                      ${access_rule.comment 
+                        ? CommentPopover(
+                            typeof access_rule.comment === 'string' 
+                              ? access_rule.comment
+                              : JSON.stringify(access_rule.comment)
+                          ) 
+                        : ''}
```

This change ensures proper handling of different comment data types and prevents potential rendering issues.


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
                    <td>
                      ${access_rule.comment
                        ? CommentPopover(
                            typeof access_rule.comment === 'string'
                              ? access_rule.comment
                              : JSON.stringify(access_rule.comment)
                          )
                        : ''}
                    </td>
`````

</details>

<!-- suggestion_end -->

<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-05-09T16:31:07Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,26 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (comment === null) {
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: nwalters512
body: Consider also handling the following:

- The empty string
- A string that is just whitespace
- An empty array
- An object with no properties
created_at: 2025-05-13T23:36:47Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,26 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (comment === null) {
+    return '';
+  } else if (typeof comment === 'string') {
+    content = comment;
+  } else {
+    content = JSON.stringify(comment, null, 2);
+  }
+
+  return html`
+    <button
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: nwalters512
body: You probably want an `aria-label` on this to make it accessible to screen readers.
created_at: 2025-05-13T23:37:03Z
author_association: CONTRIBUTOR
diff_hunk: @@ -59,6 +62,7 @@ export function InstructorAssessmentAccess({
           <table class="table table-sm table-hover" aria-label="Access rules">
             <thead>
               <tr>
+                <th><span class="visually-hidden">Comments</span></th>
path: apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
user: login: nwalters512
body: Consider only including this column if at least one access rule actually has a comment. Otherwise it's just needlessly using whitespace.

You might also consider applying `style="width: 1%"` to the column to make it as narrow as possible. We do that elsewhere in the codebase, look around for examples if you need them.

Ditto for the course instance access page.
created_at: 2025-05-13T23:41:21Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,26 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (comment === null) {
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: mylesw27
body: Updated handling of the above in [5a1e2da](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/5a1e2da667ee1ae87ffedd4aa9f6665d5c7bd0ac) & [b060c62](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/b060c62ac204b78c4e9d8f336844fa2cabc134bd).
created_at: 2025-05-14T22:56:12Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,26 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (comment === null) {
+    return '';
+  } else if (typeof comment === 'string') {
+    content = comment;
+  } else {
+    content = JSON.stringify(comment, null, 2);
+  }
+
+  return html`
+    <button
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: mylesw27
body: Added an `aria-label` in [5a1e2da](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/5a1e2da667ee1ae87ffedd4aa9f6665d5c7bd0ac). 
created_at: 2025-05-14T22:56:32Z
author_association: CONTRIBUTOR
diff_hunk: @@ -59,6 +62,7 @@ export function InstructorAssessmentAccess({
           <table class="table table-sm table-hover" aria-label="Access rules">
             <thead>
               <tr>
+                <th><span class="visually-hidden">Comments</span></th>
path: apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
user: login: mylesw27
body: Added a conditional to only display this column if any access rules actually have a comment in [5a1e2da](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/5a1e2da667ee1ae87ffedd4aa9f6665d5c7bd0ac). Also added `style="width: 1%"`. 
created_at: 2025-05-14T22:58:58Z
author_association: CONTRIBUTOR
diff_hunk: @@ -2,7 +2,11 @@ import { escapeHtml, html } from '@prairielearn/html';
 
 export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
   let content = '';
-  if (comment === null) {
+  if (
+    !comment ||
+    (Array.isArray(comment) && comment.toString() === '[]') ||
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: nwalters512
body: This is a pretty unconventional way to check for an empty array. `comment.length === 0` would be more appropriate.
created_at: 2025-05-14T23:47:03Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,32 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (
+    !comment ||
+    (typeof comment === 'string' && comment.trim() === '') ||
+    (Array.isArray(comment) && comment.toString() === '[]') ||
+    (typeof comment === 'object' && Object.keys(comment).length === 0)
+  ) {
+    return '';
+  } else if (typeof comment === 'string') {
+    content = comment;
+  } else {
+    content = JSON.stringify(comment, null, 2);
+  }
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: nwalters512
body: Nit, this could be written more compactly:

```suggestion
  }
  
  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
```
created_at: 2025-05-14T23:48:41Z
author_association: CONTRIBUTOR
diff_hunk: @@ -30,6 +33,10 @@ export function InstructorAssessmentAccess({
   resLocals: Record<string, any>;
   accessRules: AssessmentAccessRules[];
 }) {
+  const showComments =
+    accessRules.filter(
+      (access_rule) => access_rule.comment && Object.keys(access_rule.comment).length > 0,
path: apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
user: login: nwalters512
body: It is a very very happy accident that this check works:

```
> Object.keys([1, 2, 3])
[ '0', '1', '2' ]
> Object.keys('foo')
[ '0', '1', '2' ]
```

I'd prefer something more explicit like what you have in `CommentPopover.html.ts`. Maybe you want a little helper function that's like `isRenderableComment(comment)` that you can use both here and in the component? One additional check you could add there is a check that strings aren't just whitespace (unlikely, but possible and would be confusing to users to have an empty popover).
created_at: 2025-05-14T23:57:11Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,30 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (
+    !comment ||
+    (typeof comment === 'string' && comment.trim() === '') ||
+    (Array.isArray(comment) && comment.toString() === '[]') ||
+    (typeof comment === 'object' && Object.keys(comment).length === 0)
+  ) {
+    return '';
+  }
+  
+  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Fix variable redeclaration error.**

This line redeclares the `content` variable that was previously declared on line 4, causing TypeScript errors in the pipeline.

```diff
-  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
+  content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
```

Alternatively, if you remove the earlier declaration as suggested in the previous comment, you can keep this line as is.


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<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

```suggestion
  content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
```

</details>

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<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 Biome (1.9.4)</summary>

[error] 14-14: Shouldn't redeclare 'content'. Consider to delete it or rename it.

'content' is defined here:


(lint/suspicious/noRedeclare)

</details>
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<summary>🪛 GitHub Actions: CI</summary>

[error] 14-14: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

</details>
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[error] 14-14: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

</details>

</details>

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<summary>🤖 Prompt for AI Agents</summary>

```
In apps/prairielearn/src/components/CommentPopover.html.ts at line 14, the
variable `content` is redeclared, causing a TypeScript error. To fix this,
remove the earlier declaration of `content` at line 4 and keep this line as the
single declaration, or alternatively, rename this variable to avoid
redeclaration if the earlier declaration must remain.
```

</details>

<!-- This is an auto-generated reply by CodeRabbit -->

✅ Addressed in commits d45c66d to 6fc8f94
created_at: 2025-05-15T17:11:37Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,30 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Remove redundant variable declaration.**

The variable `content` is declared here but later redeclared on line 14, causing TypeScript errors detected in the pipeline. Remove this initial declaration since it's not needed.

```diff
-  let content = '';
```


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

```suggestion

```

</details>

<!-- suggestion_end -->

<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 GitHub Actions: CI</summary>

[error] 4-4: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

</details>
<details>
<summary>🪛 GitHub Actions: Images</summary>

[error] 4-4: TypeScript error TS2451: Cannot redeclare block-scoped variable 'content'.

</details>

</details>

<details>
<summary>🤖 Prompt for AI Agents</summary>

```
In apps/prairielearn/src/components/CommentPopover.html.ts at line 4, remove the
initial declaration of the variable `content` since it is redeclared later on
line 14, causing TypeScript errors. Delete the line `let content = '';` to fix
the redundancy and resolve the type conflict.
```

</details>

<!-- This is an auto-generated reply by CodeRabbit -->

✅ Addressed in commits d45c66d to 6fc8f94
created_at: 2025-05-15T17:11:37Z
author_association: CONTRIBUTOR
diff_hunk: @@ -2,7 +2,11 @@ import { escapeHtml, html } from '@prairielearn/html';
 
 export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
   let content = '';
-  if (comment === null) {
+  if (
+    !comment ||
+    (Array.isArray(comment) && comment.toString() === '[]') ||
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: mylesw27
body: Moved this check to `isRenderableComment` and updated the function to use `comment.length === 0` in [d45c66d](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/d45c66da83efc56a5fcb5a6a64b98e34331d01a2). 
created_at: 2025-05-15T17:42:48Z
author_association: CONTRIBUTOR
diff_hunk: @@ -30,6 +33,10 @@ export function InstructorAssessmentAccess({
   resLocals: Record<string, any>;
   accessRules: AssessmentAccessRules[];
 }) {
+  const showComments =
+    accessRules.filter(
+      (access_rule) => access_rule.comment && Object.keys(access_rule.comment).length > 0,
path: apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
user: login: mylesw27
body: Added the helper function `isRenderableComment(comment)` in [d45c66d](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/d45c66da83efc56a5fcb5a6a64b98e34331d01a2). I added this to `libs/comments.ts` where it can be accessed from all three places (the component and the two pages). Also with the thinking that this can be reused when we render comments elsewhere. 
created_at: 2025-05-15T17:46:14Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,30 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (
+    !comment ||
+    (typeof comment === 'string' && comment.trim() === '') ||
+    (Array.isArray(comment) && comment.toString() === '[]') ||
+    (typeof comment === 'object' && Object.keys(comment).length === 0)
+  ) {
+    return '';
+  }
+  
+  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: mylesw27
body: This was addressed in a recent update, [d45c66d](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/d45c66da83efc56a5fcb5a6a64b98e34331d01a2). 
created_at: 2025-05-15T17:46:57Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,30 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: mylesw27
body: This was addressed in a recent update, [d45c66d](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/d45c66da83efc56a5fcb5a6a64b98e34331d01a2). 
created_at: 2025-05-15T17:47:02Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,30 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (
+    !comment ||
+    (typeof comment === 'string' && comment.trim() === '') ||
+    (Array.isArray(comment) && comment.toString() === '[]') ||
+    (typeof comment === 'object' && Object.keys(comment).length === 0)
+  ) {
+    return '';
+  }
+  
+  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: coderabbitai[bot]
body: @mylesw27 Thanks for confirming that the variable redeclaration issue has been addressed. I see that the solution went beyond just fixing the redeclaration by also refactoring the comment rendering logic into a separate `isRenderableComment` utility function, which is a great improvement for code maintainability and reusability. Nice work!



ʕ •ᴥ•ʔ 👍

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<!-- <rawResChunk><answer>@mylesw27 Thanks for confirming that the variable redeclaration issue has been addressed. I see that the solution went beyond just fixing the redeclaration by also refactoring the comment rendering logic into a separate `isRenderableComment` utility function, which is a great improvement for code maintainability and reusability. Nice work!



ʕ •ᴥ•ʔ 👍

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<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-05-15T17:47:23Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,30 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: coderabbitai[bot]
body: <details>
<summary>🧩 Analysis chain</summary>

@mylesw27 Great! I've verified that the issue has been resolved in your commit. Thanks for addressing the redundant variable declaration.



---

🏁 Script executed:
```
#!/bin/bash
# Fetch the specific commit mentioned by the user
git show d45c66da83efc56a5fcb5a6a64b98e34331d01a2 -- apps/prairielearn/src/components/CommentPopover.html.ts

# Check the current state of the file to ensure the fix remained
cat apps/prairielearn/src/components/CommentPopover.html.ts
```

Length of output: 2006

---



</details>

@mylesw27 Perfect! I've verified that your commit successfully removed the redundant variable declaration and refactored the validation logic into the `isRenderableComment` function. This makes the code both more correct and more maintainable. Thanks for promptly addressing this issue.



---

<details>
<summary>🧬 Code Graph Analysis Results</summary>

### Relevant snippets for understanding `apps/prairielearn/src/components/CommentPopover.html.ts`

---

#### From `apps/prairielearn/src/lib/comments.ts` (lines 1-11)
```ts
export function isRenderableComment(comment) {
  if (
    !comment ||
    (typeof comment === 'string' && comment.trim() === '') ||
    (Array.isArray(comment) && comment.length === 0) ||
    (typeof comment === 'object' && Object.keys(comment).length === 0)
  ) {
    return false;
  }
  return true;
}
```
- This function checks if a comment is "renderable" by verifying it is not null, not an empty string, not an empty array, and not an empty object.
- Returns `true` if the comment has meaningful content, otherwise `false`.

---

#### From `packages/html/src/index.ts` (lines 74-76)
```ts
export function html(strings: TemplateStringsArray, ...values: HtmlValue[]): HtmlSafeString {
  return new HtmlSafeString(strings, values);
}
```
- `html` is a tagged template function that returns an `HtmlSafeString` object.
- Used to safely construct HTML strings with embedded values.

---

#### From `packages/html/src/index.ts` (lines 83-85)
```ts
export function escapeHtml(html: HtmlSafeString): HtmlSafeString {
  return unsafeHtml(escapeHtmlRaw(html.toString()));
}
```
- `escapeHtml` takes an `HtmlSafeString` and returns a new `HtmlSafeString` with HTML special characters escaped.
- Ensures that content is safe to insert into HTML attributes or text nodes.

---

### Summary of `apps/prairielearn/src/components/CommentPopover.html.ts`

- The `CommentPopover` function takes a comment which can be a string, array, object, or null.
- It uses `isRenderableComment` to check if the comment should be rendered.
- If renderable, it converts the comment to a string (string or JSON string for objects/arrays).
- It then returns a button element with Bootstrap popover attributes.
- The popover content is set to the escaped HTML version of the comment content, ensuring safe rendering inside the popover.

---

### Other snippets

The snippet from `apps/prairielearn/assets/scripts/instructorGradebookClient.ts` (lines 180-252) appears unrelated to comment rendering or popovers for comments, so it is not relevant here.

---

No other relevant snippets found.

</details>

---

<!-- This is an auto-generated comment: tweet message by coderabbit.ai -->

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<!-- <agentComponentType>chat-answer</agentComponentType> -->

<!-- <rawResChunk><answer><details>
<summary>🧩 Analysis chain</summary>

@mylesw27 Great! I've verified that the issue has been resolved in your commit. Thanks for addressing the redundant variable declaration.



---

🏁 Script executed:
```
#!/bin/bash
# Fetch the specific commit mentioned by the user
git show d45c66da83efc56a5fcb5a6a64b98e34331d01a2 -- apps/prairielearn/src/components/CommentPopover.html.ts

# Check the current state of the file to ensure the fix remained
cat apps/prairielearn/src/components/CommentPopover.html.ts
```

Length of output: 2006

---



</details>

@mylesw27 Perfect! I've verified that your commit successfully removed the redundant variable declaration and refactored the validation logic into the `isRenderableComment` function. This makes the code both more correct and more maintainable. Thanks for promptly addressing this issue.



---

<details>
<summary>🧬 Code Graph Analysis Results</summary>

### Relevant snippets for understanding `apps/prairielearn/src/components/CommentPopover.html.ts`

---

#### From `apps/prairielearn/src/lib/comments.ts` (lines 1-11)
```ts
export function isRenderableComment(comment) {
  if (
    !comment ||
    (typeof comment === 'string' && comment.trim() === '') ||
    (Array.isArray(comment) && comment.length === 0) ||
    (typeof comment === 'object' && Object.keys(comment).length === 0)
  ) {
    return false;
  }
  return true;
}
```
- This function checks if a comment is "renderable" by verifying it is not null, not an empty string, not an empty array, and not an empty object.
- Returns `true` if the comment has meaningful content, otherwise `false`.

---

#### From `packages/html/src/index.ts` (lines 74-76)
```ts
export function html(strings: TemplateStringsArray, ...values: HtmlValue[]): HtmlSafeString {
  return new HtmlSafeString(strings, values);
}
```
- `html` is a tagged template function that returns an `HtmlSafeString` object.
- Used to safely construct HTML strings with embedded values.

---

#### From `packages/html/src/index.ts` (lines 83-85)
```ts
export function escapeHtml(html: HtmlSafeString): HtmlSafeString {
  return unsafeHtml(escapeHtmlRaw(html.toString()));
}
```
- `escapeHtml` takes an `HtmlSafeString` and returns a new `HtmlSafeString` with HTML special characters escaped.
- Ensures that content is safe to insert into HTML attributes or text nodes.

---

### Summary of `apps/prairielearn/src/components/CommentPopover.html.ts`

- The `CommentPopover` function takes a comment which can be a string, array, object, or null.
- It uses `isRenderableComment` to check if the comment should be rendered.
- If renderable, it converts the comment to a string (string or JSON string for objects/arrays).
- It then returns a button element with Bootstrap popover attributes.
- The popover content is set to the escaped HTML version of the comment content, ensuring safe rendering inside the popover.

---

### Other snippets

The snippet from `apps/prairielearn/assets/scripts/instructorGradebookClient.ts` (lines 180-252) appears unrelated to comment rendering or popovers for comments, so it is not relevant here.

---

No other relevant snippets found.

</details>

---

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<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-05-15T17:48:15Z
author_association: CONTRIBUTOR
diff_hunk: @@ -30,6 +33,10 @@ export function InstructorAssessmentAccess({
   resLocals: Record<string, any>;
   accessRules: AssessmentAccessRules[];
 }) {
+  const showComments =
+    accessRules.filter(
+      (access_rule) => access_rule.comment && Object.keys(access_rule.comment).length > 0,
path: apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
user: login: nwalters512
body: Looks great! And good thinking putting it in `lib/`.
created_at: 2025-05-15T17:52:42Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,26 @@
+import { escapeHtml, html } from '@prairielearn/html';
+
+export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
+  let content = '';
+  if (comment === null) {
path: apps/prairielearn/src/components/CommentPopover.html.ts
user: login: nwalters512
body: Excellent, thanks.
created_at: 2025-05-15T17:53:35Z
author_association: CONTRIBUTOR
diff_hunk: @@ -81,6 +85,9 @@ export function InstructorAssessmentAccess({
                 // student data. See https://github.com/PrairieLearn/PrairieLearn/issues/3342
                 return html`
                   <tr>
+                    <td>
+                      ${access_rule.comment ? CommentPopover(access_rule.comment.toString()) : ''}
+                    </td>
path: apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
user: login: nwalters512
body: It no longer does this, right?
created_at: 2025-05-15T17:53:54Z
author_association: CONTRIBUTOR
diff_hunk: @@ -81,6 +85,9 @@ export function InstructorAssessmentAccess({
                 // student data. See https://github.com/PrairieLearn/PrairieLearn/issues/3342
                 return html`
                   <tr>
+                    <td>
+                      ${access_rule.comment ? CommentPopover(access_rule.comment.toString()) : ''}
+                    </td>
path: apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts
user: login: coderabbitai[bot]
body: <details>
<summary>🧩 Analysis chain</summary>

@nwalters512 You're right! The current code no longer does this. The `CommentPopover` component already handles different comment data types internally, so there's no need to convert the comment using `toString()` or `JSON.stringify()` before passing it to the component.

Looking at the code, it now directly passes the comment object to the `CommentPopover` component:
```typescript
${showComments ? html`<td>${CommentPopover(access_rule.comment)}</td>` : ''}
```

The `CommentPopover` component itself handles the different types of comments appropriately. The bot's suggestion was addressing an issue that has already been fixed in the current implementation.

---

🏁 Script executed:
```
#!/bin/bash
# Check the CommentPopover component implementation
cat apps/prairielearn/src/components/CommentPopover.html.ts

# Check the current code in instructorAssessmentAccess.html.ts, focusing on the relevant section
cat apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts | grep -A10 -B10 "access_rule.comment"
```

Length of output: 2712

---



</details>

@nwalters512 You're correct! The current code no longer does this. Looking at the implementation:

1. In `instructorAssessmentAccess.html.ts`, the code directly passes the comment object to `CommentPopover`:
```typescript
${showComments ? html`<td>${CommentPopover(access_rule.comment)}</td>` : ''}
```

2. The `CommentPopover` component already handles different data types internally:
```typescript
export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
  if (!isRenderableComment(comment)) {
    return '';
  }
  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
  // ...
}
```

The bot's suggestion was addressing an issue that's already been fixed in the current implementation. The component now properly handles string, array, and object comment types without needing additional conversion beforehand.

---

<details>
<summary>🧬 Code Graph Analysis Results</summary>

### Relevant snippets for understanding `apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts`

---

#### File: `apps/prairielearn/src/lib/comments.ts` (lines 1-11)
```ts
export function isRenderableComment(comment) {
  if (
    !comment ||
    (typeof comment === 'string' && comment.trim() === '') ||
    (Array.isArray(comment) && comment.length === 0) ||
    (typeof comment === 'object' && Object.keys(comment).length === 0)
  ) {
    return false;
  }
  return true;
}
```
- Determines if a comment is considered "renderable" (non-empty and meaningful).
- Returns `false` for null, empty strings, empty arrays, or empty objects.
- Returns `true` otherwise.

---

#### File: `apps/prairielearn/src/components/CommentPopover.html.ts` (lines 5-25)
```ts
export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
  if (!isRenderableComment(comment)) {
    return '';
  }
  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);

  return html`
    <button
      type="button"
      class="btn btn-xs btn-ghost"
      aria-label="Access rule comment"
      data-bs-toggle="popover"
      data-bs-container="body"
      data-bs-placement="auto"
      data-bs-html="true"
      data-bs-content="${escapeHtml(html`${content}`)}"
    >
      <i class="fa fa-comment"></i>
    </button>
  `;
}
```
- Renders a button with a popover showing the comment content if the comment is renderable.
- If the comment is not renderable, returns an empty string (no button).
- Supports comments as strings, arrays, or objects (serialized as JSON).

---

#### File: `apps/prairielearn/src/components/SyncErrorsAndWarnings.html.ts` (lines 72-93)
```ts
export function AssessmentSyncErrorsAndWarnings({
  authz_data,
  assessment,
  courseInstance,
  course,
  urlPrefix,
}: {
  authz_data: { has_course_instance_permission_edit: boolean };
  assessment: Assessment;
  courseInstance: CourseInstance;
  course: Course;
  urlPrefix: string;
}) {
  return SyncErrorsAndWarnings({
    authz_data,
    exampleCourse: course.example_course,
    syncErrors: assessment.sync_errors,
    syncWarnings: assessment.sync_warnings,
    fileEditUrl: `${urlPrefix}/assessment/${assessment.id}/file_edit/courseInstances/${courseInstance.short_name}/assessments/${assessment.tid}/infoAssessment.json`,
    context: 'assessment',
  });
}
```
- Renders synchronization errors and warnings related to the assessment.
- Uses authorization data and assessment/course context to generate the display.

---

#### File: `apps/prairielearn/src/components/PageLayout.html.ts` (lines 15-213) — Summary
- Provides the main page layout HTML structure.
- Parameters:
  - `resLocals`: Express response locals.
  - `pageTitle`: Title of the page.
  - `navContext`: Navigation context (type, page, subPage).
  - `options`: Layout options (fullWidth, marginBottom, pageNote, hxExt, fullHeight).
  - `headContent`, `preContent`, `content`, `postContent`: HTML content slots.
- Handles enhanced navigation with side nav and context navigation.
- Renders navbar, side nav, main content container, and footer.
- Returns a full HTML document string.

---

#### File: `apps/prairielearn/src/lib/db-types.ts` (line 23)
```ts
export const JsonCommentSchema = z.union([z.string(), z.array(z.any()), z.record(z.any())]);
```
- Zod schema defining the shape of a comment as either a string, an array, or an object.

---

#### File: `apps/prairielearn/src/lib/config.ts` (line 576)
```ts
export const config = loader.config;
```
- Exports the global configuration object used in the app.
- Used in the main file to get `config.ptHost` and `config.devMode`.

---

These snippets provide context on:

- How comments are checked for renderability and displayed (`isRenderableComment`, `CommentPopover`).
- The page layout and navigation structure (`PageLayout`).
- The schema and typing of comments (`JsonCommentSchema`).
- Configuration usage (`config`).
- Display of sync errors and warnings (`AssessmentSyncErrorsAndWarnings`).

They are relevant to understanding the behavior and rendering logic in `instructorAssessmentAccess.html.ts`.

</details>


<!-- <agentComponentType>chat-answer</agentComponentType> -->

<!-- <rawResChunk><answer><details>
<summary>🧩 Analysis chain</summary>

@nwalters512 You're right! The current code no longer does this. The `CommentPopover` component already handles different comment data types internally, so there's no need to convert the comment using `toString()` or `JSON.stringify()` before passing it to the component.

Looking at the code, it now directly passes the comment object to the `CommentPopover` component:
```typescript
${showComments ? html`<td>${CommentPopover(access_rule.comment)}</td>` : ''}
```

The `CommentPopover` component itself handles the different types of comments appropriately. The bot's suggestion was addressing an issue that has already been fixed in the current implementation.

---

🏁 Script executed:
```
#!/bin/bash
# Check the CommentPopover component implementation
cat apps/prairielearn/src/components/CommentPopover.html.ts

# Check the current code in instructorAssessmentAccess.html.ts, focusing on the relevant section
cat apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts | grep -A10 -B10 "access_rule.comment"
```

Length of output: 2712

---



</details>

@nwalters512 You're correct! The current code no longer does this. Looking at the implementation:

1. In `instructorAssessmentAccess.html.ts`, the code directly passes the comment object to `CommentPopover`:
```typescript
${showComments ? html`<td>${CommentPopover(access_rule.comment)}</td>` : ''}
```

2. The `CommentPopover` component already handles different data types internally:
```typescript
export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
  if (!isRenderableComment(comment)) {
    return '';
  }
  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);
  // ...
}
```

The bot's suggestion was addressing an issue that's already been fixed in the current implementation. The component now properly handles string, array, and object comment types without needing additional conversion beforehand.

---

<details>
<summary>🧬 Code Graph Analysis Results</summary>

### Relevant snippets for understanding `apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts`

---

#### File: `apps/prairielearn/src/lib/comments.ts` (lines 1-11)
```ts
export function isRenderableComment(comment) {
  if (
    !comment ||
    (typeof comment === 'string' && comment.trim() === '') ||
    (Array.isArray(comment) && comment.length === 0) ||
    (typeof comment === 'object' && Object.keys(comment).length === 0)
  ) {
    return false;
  }
  return true;
}
```
- Determines if a comment is considered "renderable" (non-empty and meaningful).
- Returns `false` for null, empty strings, empty arrays, or empty objects.
- Returns `true` otherwise.

---

#### File: `apps/prairielearn/src/components/CommentPopover.html.ts` (lines 5-25)
```ts
export function CommentPopover(comment: string | string[] | Record<string, any> | null) {
  if (!isRenderableComment(comment)) {
    return '';
  }
  const content = typeof comment === 'string' ? comment : JSON.stringify(comment, null, 2);

  return html`
    <button
      type="button"
      class="btn btn-xs btn-ghost"
      aria-label="Access rule comment"
      data-bs-toggle="popover"
      data-bs-container="body"
      data-bs-placement="auto"
      data-bs-html="true"
      data-bs-content="${escapeHtml(html`${content}`)}"
    >
      <i class="fa fa-comment"></i>
    </button>
  `;
}
```
- Renders a button with a popover showing the comment content if the comment is renderable.
- If the comment is not renderable, returns an empty string (no button).
- Supports comments as strings, arrays, or objects (serialized as JSON).

---

#### File: `apps/prairielearn/src/components/SyncErrorsAndWarnings.html.ts` (lines 72-93)
```ts
export function AssessmentSyncErrorsAndWarnings({
  authz_data,
  assessment,
  courseInstance,
  course,
  urlPrefix,
}: {
  authz_data: { has_course_instance_permission_edit: boolean };
  assessment: Assessment;
  courseInstance: CourseInstance;
  course: Course;
  urlPrefix: string;
}) {
  return SyncErrorsAndWarnings({
    authz_data,
    exampleCourse: course.example_course,
    syncErrors: assessment.sync_errors,
    syncWarnings: assessment.sync_warnings,
    fileEditUrl: `${urlPrefix}/assessment/${assessment.id}/file_edit/courseInstances/${courseInstance.short_name}/assessments/${assessment.tid}/infoAssessment.json`,
    context: 'assessment',
  });
}
```
- Renders synchronization errors and warnings related to the assessment.
- Uses authorization data and assessment/course context to generate the display.

---

#### File: `apps/prairielearn/src/components/PageLayout.html.ts` (lines 15-213) — Summary
- Provides the main page layout HTML structure.
- Parameters:
  - `resLocals`: Express response locals.
  - `pageTitle`: Title of the page.
  - `navContext`: Navigation context (type, page, subPage).
  - `options`: Layout options (fullWidth, marginBottom, pageNote, hxExt, fullHeight).
  - `headContent`, `preContent`, `content`, `postContent`: HTML content slots.
- Handles enhanced navigation with side nav and context navigation.
- Renders navbar, side nav, main content container, and footer.
- Returns a full HTML document string.

---

#### File: `apps/prairielearn/src/lib/db-types.ts` (line 23)
```ts
export const JsonCommentSchema = z.union([z.string(), z.array(z.any()), z.record(z.any())]);
```
- Zod schema defining the shape of a comment as either a string, an array, or an object.

---

#### File: `apps/prairielearn/src/lib/config.ts` (line 576)
```ts
export const config = loader.config;
```
- Exports the global configuration object used in the app.
- Used in the main file to get `config.ptHost` and `config.devMode`.

---

These snippets provide context on:

- How comments are checked for renderability and displayed (`isRenderableComment`, `CommentPopover`).
- The page layout and navigation structure (`PageLayout`).
- The schema and typing of comments (`JsonCommentSchema`).
- Configuration usage (`config`).
- Display of sync errors and warnings (`AssessmentSyncErrorsAndWarnings`).

They are relevant to understanding the behavior and rendering logic in `instructorAssessmentAccess.html.ts`.

</details>

</answer></rawResChunk> -->

<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-05-15T17:55:19Z
author_association: CONTRIBUTOR
diff_hunk: @@ -13,6 +15,8 @@ export function InstructorInstanceAdminAccess({
   accessRules: CourseInstanceAccessRule[];
 }) {
   const { authz_data, course_instance } = resLocals;
+  const showComments =
+    accessRules.filter((access_rule) => isRenderableComment(access_rule.json_comment)).length > 0;
path: apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts
user: login: nwalters512
body: Nit: if you just care about whether an array has anything at all matching a predicate, it's better to use [`Array.prototype.some`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some). This has two nice performance characteristics:

- It avoids allocating a new array.
- It will stop iterating as soon as it finds a single thing that matches the predicate.

It's also a little more concise!
created_at: 2025-05-15T17:55:20Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,11 @@
+export function isRenderableComment(comment) {
path: apps/prairielearn/src/lib/comments.ts
user: login: nwalters512
body: Nit, we can add some types here.

```suggestion
export function isRenderableComment(comment: string | any[] | Record<string, any>) {
```
created_at: 2025-05-15T17:56:10Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,11 @@
+export function isRenderableComment(comment) {
+  if (
+    !comment ||
+    (typeof comment === 'string' && comment.trim() === '') ||
+    (Array.isArray(comment) && comment.length === 0) ||
+    (typeof comment === 'object' && Object.keys(comment).length === 0)
+  ) {
+    return false;
+  }
+  return true;
path: apps/prairielearn/src/lib/comments.ts
user: login: nwalters512
body: Consider adding some tests for this file. While this is pretty trivial behavior, it's nice to get in the habit of writing tests for things that are easily testable.
created_at: 2025-05-15T17:56:39Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,11 @@
+export function isRenderableComment(comment) {
path: apps/prairielearn/src/lib/comments.ts
user: login: nwalters512
body: Nit, you might consider a JSDoc comment explaining what this is meant to be used for (comments from JSON files, which themselves might have this variety of types).
created_at: 2025-05-15T17:57:47Z
author_association: CONTRIBUTOR
diff_hunk: @@ -13,6 +15,8 @@ export function InstructorInstanceAdminAccess({
   accessRules: CourseInstanceAccessRule[];
 }) {
   const { authz_data, course_instance } = resLocals;
+  const showComments =
+    accessRules.filter((access_rule) => isRenderableComment(access_rule.json_comment)).length > 0;
path: apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts
user: login: mylesw27
body: This is great! Updated to `accessRules.some()` here and in assessment access rules in [2e19053](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/2e19053eb792d55be58d106aedfa6a9ba6020601). 
created_at: 2025-05-15T18:23:20Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,11 @@
+export function isRenderableComment(comment) {
path: apps/prairielearn/src/lib/comments.ts
user: login: mylesw27
body: Added types in [2e19053](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/2e19053eb792d55be58d106aedfa6a9ba6020601). 
created_at: 2025-05-15T18:23:57Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,11 @@
+export function isRenderableComment(comment) {
+  if (
+    !comment ||
+    (typeof comment === 'string' && comment.trim() === '') ||
+    (Array.isArray(comment) && comment.length === 0) ||
+    (typeof comment === 'object' && Object.keys(comment).length === 0)
+  ) {
+    return false;
+  }
+  return true;
path: apps/prairielearn/src/lib/comments.ts
user: login: mylesw27
body: Added tests in [2e19053](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/2e19053eb792d55be58d106aedfa6a9ba6020601). 
created_at: 2025-05-15T18:24:22Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,11 @@
+export function isRenderableComment(comment) {
path: apps/prairielearn/src/lib/comments.ts
user: login: mylesw27
body: Added a JSDoc comment in [2e19053](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/2e19053eb792d55be58d106aedfa6a9ba6020601). 
created_at: 2025-05-15T18:24:36Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,17 @@
+/**
+ * Returns a boolean indicating that the comment is not null or empty and should be rendered.
+ *
+ * @param comment - the comment being assessed
+ */
+
path: apps/prairielearn/src/lib/comments.ts
user: login: nwalters512
body: There shouldn't be a newline between the comment and the function.
created_at: 2025-05-15T19:25:12Z
author_association: CONTRIBUTOR
path: apps/prairielearn/src/tests/comments.test.ts
user: login: nwalters512
body: This file should live adjacent to `comments.ts`. We typically reserve the `tests` directory for integration tests than span many files or bits of functionality, but these are really just unit tests.
created_at: 2025-05-15T19:25:52Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,37 @@
+import { assert } from 'chai';
+
+import { isRenderableComment } from '../lib/comments.js';
+
+describe('isRenderable should determine non-empty comments', function () {
path: apps/prairielearn/src/tests/comments.test.ts
user: login: nwalters512
body: Nit, conventionally for unit tests, we use the function name as the name of the describe block.

```suggestion
describe('isRenderableComment', function () {
```
created_at: 2025-05-15T19:26:23Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,17 @@
+/**
+ * Returns a boolean indicating that the comment is not null or empty and should be rendered.
+ *
+ * @param comment - the comment being assessed
+ */
+
path: apps/prairielearn/src/lib/comments.ts
user: login: mylesw27
body: Removed empty line in [54216f0](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/54216f0435ad1be2f3a449525f33fa75076bccdf). 
created_at: 2025-05-15T19:57:26Z
author_association: CONTRIBUTOR
path: apps/prairielearn/src/tests/comments.test.ts
user: login: mylesw27
body: Moved test file to the `libs` directory in [54216f0](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/54216f0435ad1be2f3a449525f33fa75076bccdf). 
created_at: 2025-05-15T19:58:04Z
author_association: CONTRIBUTOR
diff_hunk: @@ -0,0 +1,37 @@
+import { assert } from 'chai';
+
+import { isRenderableComment } from '../lib/comments.js';
+
+describe('isRenderable should determine non-empty comments', function () {
path: apps/prairielearn/src/tests/comments.test.ts
user: login: mylesw27
body: Updated locally in [54216f0](https://github.com/PrairieLearn/PrairieLearn/pull/11947/commits/54216f0435ad1be2f3a449525f33fa75076bccdf). 
created_at: 2025-05-15T19:58:13Z
author_association: CONTRIBUTOR

PR comments:
user: login: coderabbitai[bot]
created_at: 2025-05-09T16:28:16Z
body: <!-- This is an auto-generated comment: summarize by coderabbit.ai -->
<!-- walkthrough_start -->

<details>
<summary>📝 Walkthrough</summary>

## Walkthrough

A comment popover feature is introduced, including a new `CommentPopover` component and a utility function `isRenderableComment` to determine if comments should be rendered. Schema and SQL changes add support for storing and retrieving comments in access rules. Table rendering logic is updated to conditionally display comment popovers when relevant.

## Changes

| File(s)                                                                                                   | Change Summary |
|-----------------------------------------------------------------------------------------------------------|---------------|
| apps/prairielearn/src/components/CommentPopover.html.ts                                                    | Added `CommentPopover` function component to render comments as Bootstrap popover buttons, handling various comment types and ensuring safe HTML escaping. |
| apps/prairielearn/src/lib/comments.ts<br>apps/prairielearn/src/lib/comments.test.ts                        | Introduced `isRenderableComment` utility to filter out empty/non-meaningful comments and added a corresponding test suite covering multiple input scenarios. |
| apps/prairielearn/src/lib/db-types.ts                                                                      | Changed `JsonCommentSchema` from a local to an exported constant, making it available for use in other modules. |
| apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.html.ts                  | Added a nullable `comment` field to the access rules schema, and updated table rendering to show a comment popover column if any rule has a renderable comment. |
| apps/prairielearn/src/pages/instructorAssessmentAccess/instructorAssessmentAccess.sql                      | Modified SQL query to select the `json_comment` column as `comment` for access rules, extending the query output. |
| apps/prairielearn/src/pages/instructorInstanceAdminAccess/instructorInstanceAdminAccess.html.ts            | Updated logic to conditionally display a "Comments" column and popover in the access rules table, adjusting helper function signatures accordingly. |

</details>

<!-- walkthrough_end -->


---

<details>
<summary>📜 Recent review details</summary>

**Configuration used: .coderabbit.yaml**
**Review profile: CHILL**
**Plan: Pro**
**Cache: Disabled due to data retention organization setting**
**Knowledge Base: Disabled due to data retention organization setting**


<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 9922a6bff5869364385d01104d7fc81b3c8212a8 and 54216f0435ad1be2f3a449525f33fa75076bccdf.

</details>

<details>
<summary>📒 Files selected for processing (2)</summary>

* `apps/prairielearn/src/lib/comments.test.ts` (1 hunks)
* `apps/prairielearn/src/lib/comments.ts` (1 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (1)</summary>

* apps/prairielearn/src/lib/comments.ts

</details>

<details>
<summary>🧰 Additional context used</summary>

<details>
<summary>🧬 Code Graph Analysis (1)</summary>

<details>
<summary>apps/prairielearn/src/lib/comments.test.ts (1)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/lib/comments.ts (1)</summary>

* `isRenderableComment` (6-16)

</details>

</blockquote></details>

</details>

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (4)</summary>

* GitHub Check: test-prairielearn
* GitHub Check: native-checks-js
* GitHub Check: build-core-images / build-images (ubuntu-24.04)
* GitHub Check: build-core-images / build-images (ubuntu-24.04-arm)

</details>

<details>
<summary>🔇 Additional comments (3)</summary><blockquote>

<details>
<summary>apps/prairielearn/src/lib/comments.test.ts (3)</summary>

`1-37`: **Well-structured test suite with comprehensive coverage.**

This test suite thoroughly verifies the behavior of the `isRenderableComment` function across all expected input types and edge cases. The tests logically cover positive cases (non-empty strings, arrays, and objects) and negative cases (null, empty values, whitespace-only strings).

---

`18-20`: **Good coverage of null input.**

Properly testing the null case is important as it's explicitly mentioned in the function signature and is a common edge case in JavaScript/TypeScript.

---

`34-36`: **Important edge case for whitespace strings.**

Testing whitespace-only strings is a good edge case to include, as it validates the function's trim logic for string inputs.

</details>

</blockquote></details>

</details>
<!-- internal state start -->


<!-- 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-->

<!-- internal state end -->
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<details open="true">
<summary>✨ Finishing Touches</summary>

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</details>

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author_association: CONTRIBUTOR
user: login: codecov[bot]
created_at: 2025-05-09T16:30:49Z
body: ## [Codecov](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?dropdown=coverage&src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn) Report
:x: Patch coverage is `58.73016%` with `26 lines` in your changes missing coverage. Please review.
:white_check_mark: Project coverage is 71.32%. Comparing base ([`db2208a`](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/commit/db2208a6bc96c2ce70385cab6f52fe0c5cac732d?dropdown=coverage&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn)) to head ([`54216f0`](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/commit/54216f0435ad1be2f3a449525f33fa75076bccdf?dropdown=coverage&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn)).
:warning: Report is 443 commits behind head on master.

| [Files with missing lines](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn) | Patch % | Lines |
|---|---|---|
| [...prairielearn/src/components/CommentPopover.html.ts](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?src=pr&el=tree&filepath=apps%2Fprairielearn%2Fsrc%2Fcomponents%2FCommentPopover.html.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn#diff-YXBwcy9wcmFpcmllbGVhcm4vc3JjL2NvbXBvbmVudHMvQ29tbWVudFBvcG92ZXIuaHRtbC50cw==) | 20.00% | [20 Missing :warning: ](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn) |
| [...ssessmentAccess/instructorAssessmentAccess.html.ts](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?src=pr&el=tree&filepath=apps%2Fprairielearn%2Fsrc%2Fpages%2FinstructorAssessmentAccess%2FinstructorAssessmentAccess.html.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn#diff-YXBwcy9wcmFpcmllbGVhcm4vc3JjL3BhZ2VzL2luc3RydWN0b3JBc3Nlc3NtZW50QWNjZXNzL2luc3RydWN0b3JBc3Nlc3NtZW50QWNjZXNzLmh0bWwudHM=) | 66.66% | [3 Missing :warning: ](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn) |
| [...eAdminAccess/instructorInstanceAdminAccess.html.ts](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?src=pr&el=tree&filepath=apps%2Fprairielearn%2Fsrc%2Fpages%2FinstructorInstanceAdminAccess%2FinstructorInstanceAdminAccess.html.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn#diff-YXBwcy9wcmFpcmllbGVhcm4vc3JjL3BhZ2VzL2luc3RydWN0b3JJbnN0YW5jZUFkbWluQWNjZXNzL2luc3RydWN0b3JJbnN0YW5jZUFkbWluQWNjZXNzLmh0bWwudHM=) | 75.00% | [3 Missing :warning: ](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn) |

<details><summary>Additional details and impacted files</summary>



```diff
@@             Coverage Diff             @@
##           master   #11947       +/-   ##
===========================================
+ Coverage   61.25%   71.32%   +10.07%     
===========================================
  Files         694      697        +3     
  Lines      106296   106933      +637     
  Branches     6987     8233     +1246     
===========================================
+ Hits        65107    76267    +11160     
+ Misses      40666    30146    -10520     
+ Partials      523      520        -3     
```

| [Flag](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn) | Coverage Δ | |
|---|---|---|
| [javascript](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn) | `71.11% <58.73%> (+10.29%)` | :arrow_up: |
| [python](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn) | `81.04% <ø> (ø)` | |

Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn#carryforward-flags-in-the-pull-request-comment) to find out more.
</details>

[:umbrella: View full report in Codecov by Sentry](https://app.codecov.io/gh/PrairieLearn/PrairieLearn/pull/11947?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn).   
:loudspeaker: Have feedback on the report? [Share it here](https://about.codecov.io/codecov-pr-comment-feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PrairieLearn).
<details><summary> :rocket: New features to boost your workflow: </summary>

- :snowflake: [Test Analytics](https://docs.codecov.com/docs/test-analytics): Detect flaky tests, report on failures, and find test suite problems.
</details>
author_association: NONE
user: login: github-actions[bot]
created_at: 2025-05-09T16:32:05Z
body: ## All images

| Image | Platform | Old Size | New Size | Change |
| --- | --- | --- | --- | --- |
| [prairielearn/executor:54216f0435ad1be2f3a449525f33fa75076bccdf](https://hub.docker.com/layers/prairielearn/executor/54216f0435ad1be2f3a449525f33fa75076bccdf/images/sha256-ebc28a68aeeb26944f79604e8e02644dde268dcd3957a55392edcdcec7e8f86b?context=explore) | linux/amd64 | 1218.71 MB | 1218.73 MB | 0.00% |
| [prairielearn/executor:54216f0435ad1be2f3a449525f33fa75076bccdf](https://hub.docker.com/layers/prairielearn/executor/54216f0435ad1be2f3a449525f33fa75076bccdf/images/sha256-d456afd437443490219f8f3e5db476a46f8c646605ad034f83eb8445a6d57fda?context=explore) | linux/arm64 | 1232.00 MB | 1232.02 MB | 0.00% |
| [prairielearn/prairielearn:54216f0435ad1be2f3a449525f33fa75076bccdf](https://hub.docker.com/layers/prairielearn/prairielearn/54216f0435ad1be2f3a449525f33fa75076bccdf/images/sha256-1348c311bc881812c539171420b45b69f2289d9c6dc18514f71294d32cc50f93?context=explore) | linux/amd64 | 1218.71 MB | 1218.73 MB | 0.00% |
| [prairielearn/prairielearn:54216f0435ad1be2f3a449525f33fa75076bccdf](https://hub.docker.com/layers/prairielearn/prairielearn/54216f0435ad1be2f3a449525f33fa75076bccdf/images/sha256-433565dd45a6f33f59d46b196a1009d4479674f9499e0c24af8dbee33ea11976?context=explore) | linux/arm64 | 1232.00 MB | 1232.02 MB | 0.00% |
author_association: CONTRIBUTOR
user: login: firasm
created_at: 2025-05-10T03:32:15Z
body: Thank you for adding this feature!! This would really help me!
author_association: CONTRIBUTOR