[TAS-5149] ✨ Implement annotation feature for EPUB reader by nwingt · Pull Request #643 · likecoin/3ook-com

nwingt · 2026-01-27T07:42:13Z

notion-workspace · 2026-01-27T07:42:19Z

Copilot

Pull request overview

Implements an annotation (highlights + notes) feature for the EPUB reader, including persistence via Firestore-backed APIs and new UI components for creating/editing/navigating annotations.

Changes:

Added shared/server annotation types and Firestore utility functions for CRUD operations.
Introduced /api/books/:nftClassId/annotations endpoints (list/create/update/delete).
Updated the EPUB reader UI to render highlights, show a selection menu + modal editor, and display an annotations list; added i18n strings and color constants.

Reviewed changes

Copilot reviewed 13 out of 15 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
shared/types/annotation.d.ts	Adds shared annotation type definitions (color, base fields, create/update shapes).
server/types/annotation.d.ts	Defines Firestore data shape for annotations.
server/utils/annotations.ts	Firestore CRUD utilities for annotations under user/book documents.
server/api/books/[nftClassId]/annotations/index.get.ts	Lists annotations for a user/book.
server/api/books/[nftClassId]/annotations/index.post.ts	Creates an annotation with basic validation.
server/api/books/[nftClassId]/annotations/[annotationId].post.ts	Updates annotation color/note.
server/api/books/[nftClassId]/annotations/[annotationId].delete.ts	Deletes an annotation.
constants/annotations.ts	Centralizes annotation color options and rgba mappings.
composables/use-annotations.ts	Client composable for fetching and mutating annotations via the new APIs.
components/AnnotationsList.vue	UI list for existing highlights/notes and navigation to a highlight.
components/AnnotationMenu.vue	Context menu for selection-based highlight color + “note” action.
components/AnnotationModal.vue	Modal UI for editing color and note, deleting highlights.
pages/reader/epub.vue	Integrates selection handling, highlight rendering, and annotation UI into the EPUB reader.
i18n/locales/en.json	Adds English strings for annotations UI.
i18n/locales/zh-Hant.json	Adds Traditional Chinese strings for annotations UI.

server/api/books/[nftClassId]/annotations/index.post.ts

components/AnnotationModal.vue

components/AnnotationsList.vue

pages/reader/epub.vue

server/utils/annotations.ts

components/AnnotationMenu.vue

server/api/books/[nftClassId]/annotations/[annotationId].post.ts

components/AnnotationModal.vue

pages/reader/epub.vue

✨ Implement annotation feature for EPUB reader

Copilot

Pull request overview

Copilot reviewed 17 out of 19 changed files in this pull request and generated 8 comments.

components/AnnotationMenu.vue

Copilot · 2026-02-26T09:31:48Z

pages/reader/epub.vue

+    // Access via manager to get Contents array
+    const contents = rendition.value?.manager?.getContents()
+    const content = contents?.[0]
+    if (!content) {
+      isAnnotationMenuVisible.value = false
+      return
+    }
+
+    const cfiRange = content.cfiFromRange(range)
+    if (!cfiRange) {
+      isAnnotationMenuVisible.value = false
+      return
+    }
+
+    selectedText.value = text.slice(0, ANNOTATION_TEXT_MAX_LENGTH)
+    selectedCfi.value = cfiRange
+    selectedChapterTitle.value = activeNavItemLabel.value
+
+    const rect = range.getBoundingClientRect()
+    const iframe = renditionElement.value?.querySelector('iframe')
+    const iframeRect = iframe?.getBoundingClientRect()
+


handleTextSelection always uses contents?.[0] and the first iframe to compute the CFI range and menu position. In paginated/spread rendering there can be multiple Contents/iframes; this can produce an incorrect CFI and misplace the menu when the selection is in a different view. Prefer selecting the content/iframe that matches the viewWindow (e.g., match content.window === viewWindow or iframe.contentWindow === viewWindow).

server/api/books/[nftClassId]/annotations/[annotationId].post.ts

pages/reader/epub.vue

server/api/books/[nftClassId]/annotations/index.post.ts

components/AnnotationsList.vue

components/AnnotationModal.vue

Copilot

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Copilot

Pull request overview

Copilot reviewed 17 out of 19 changed files in this pull request and generated 1 comment.

components/AnnotationsList.vue

commit 959d68f Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 17:35:05 2026 +0800 🎨 Update unused function param name commit ff39b68 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 16:51:03 2026 +0800 🎨 Use setHeaders instead of setResponseHeader commit 2745979 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 16:38:10 2026 +0800 🚸 Prevent system menu blocking annotation menu commit 9d36efc Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:37:56 2026 +0800 🐛 Fix annotation modal open when saving failed commit ab1ad96 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:00:33 2026 +0800 🎨 Sanitize annotations export filename commit 75f7eef Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:00:06 2026 +0800 🎨 Use UUID for temp annotation commit e2537e3 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:31:51 2026 +0800 🎨 Prevent memory leak commit 69bfe0b Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:29:49 2026 +0800 🥅 Guard annotation navigation commit 511a24e Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:20:53 2026 +0800 🎨 Ensures annotations re-rendered when update commit 11a5734 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 10:44:15 2026 +0800 🔒 Truncate annotation text to max length on client side commit f6b262c Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 10:22:44 2026 +0800 🚸 Improve annotation UX commit a208d2e Author: Ng Wing Tat, David <i@ngwingt.at> Date: Wed Feb 25 23:34:22 2026 +0800 🐛 Fix EventListener type mismatch in annotation highlight callback commit a360ab4 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Wed Feb 25 10:30:29 2026 +0800 🎨 Use typed Firestore collection commit 50f1949 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 12 22:52:15 2026 +0800 ✨ Support annotations export commit b5e85f8 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Tue Jan 27 15:41:25 2026 +0800 ✨ Implement annotation feature for EPUB reader

Copilot

Pull request overview

Copilot reviewed 17 out of 19 changed files in this pull request and generated 6 comments.

Copilot · 2026-02-26T10:14:53Z

composables/use-annotations.ts

+    return annotation
+  }
+
+  async function saveAnnotation(annotationId: string, data: AnnotationCreateData): Promise<Annotation | null> {


Race condition potential: If saveAnnotation is called while a previous fetchAnnotations is still in progress (via fetchPromise), the local annotation will be removed on line 56 but the fetch might complete afterwards and not include the new annotation. This could lead to a lost annotation in the UI. Consider checking if a fetch is in progress before removing the annotation, or handle this case explicitly.

Suggested change

async function saveAnnotation(annotationId: string, data: AnnotationCreateData): Promise<Annotation | null> {

async function saveAnnotation(annotationId: string, data: AnnotationCreateData): Promise<Annotation | null> {

// Ensure any in-flight fetchAnnotations completes before we mutate annotations

if (fetchPromise.value) {

await fetchPromise.value

}

Copilot · 2026-02-26T10:14:53Z

server/api/books/[nftClassId]/annotations/[annotationId].post.ts

+  catch (error) {
+    if (error instanceof H3Error && error.statusCode === 404) {
+      throw error
+    }
+    console.error(`Failed to update annotation ${annotationId}:`, error)
+    throw createError({
+      statusCode: 500,
+      message: 'FAILED_TO_UPDATE_ANNOTATION',
+    })
+  }


Inconsistent error handling: The error handling here wraps specific error types (H3Error with 404) but re-throws them, which is correct. However, other endpoints like index.post.ts (lines 99-105) check for specific gRPC status codes. Consider documenting the error handling patterns or creating a shared error handling utility to ensure consistency across all annotation endpoints.

pages/reader/epub.vue

Copilot · 2026-02-26T10:14:54Z

pages/reader/epub.vue

+  setTimeout(() => {
+    editingAnnotation.value = null
+    isNewAnnotation.value = false
+  }, 300)


Modal state timing: The modal close and state cleanup use a 300ms timeout (lines 1306-1309, 1334-1337) to wait for the modal close animation. This hardcoded delay could cause issues if the modal's animation duration changes. Consider using a CSS transition event listener or defining the animation duration as a shared constant to ensure the timing stays synchronized.

server/utils/annotations.ts

Copilot · 2026-02-26T10:14:54Z

pages/reader/epub.vue

+    if (removeMouseUpListener) {
+      removeMouseUpListener()
+    }
+    removeMouseUpListener = useEventListener(view.window, 'mouseup', (event: MouseEvent) => {
+      // Delay for window.getSelection() reflects the final selection state
+      setTimeout(() => {
+        handleTextSelection(event, view.window)
+      }, 10)
+    })
+
+    if (removeTouchEndListener) {
+      removeTouchEndListener()
+    }
+    removeTouchEndListener = useEventListener(view.window, 'touchend', (event: TouchEvent) => {
+      // Delay for touch selection to allow the browser's native selection UI (drag handles) to stabilize
+      setTimeout(() => {
+        const touch = event.changedTouches[0]
+        if (touch) {
+          const mouseEvent = { clientX: touch.clientX, clientY: touch.clientY } as MouseEvent
+          handleTextSelection(mouseEvent, view.window)
+        }
+      }, 300)
+    })


Memory management: The cleanup in onBeforeUnmount is good, but the removeMouseUpListener and removeTouchEndListener are added in the displayed event handler (lines 799-821) which fires for each page/section loaded. If the user navigates through multiple pages before unmounting, multiple listeners could be registered without cleanup. The current implementation only stores the latest cleanup function, so previous listeners may leak. Consider removing the old listener before adding a new one, e.g., if (removeMouseUpListener) removeMouseUpListener() before line 802.

commit 959d68f Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 17:35:05 2026 +0800 🎨 Update unused function param name commit ff39b68 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 16:51:03 2026 +0800 🎨 Use setHeaders instead of setResponseHeader commit 2745979 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 16:38:10 2026 +0800 🚸 Prevent system menu blocking annotation menu commit 9d36efc Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:37:56 2026 +0800 🐛 Fix annotation modal open when saving failed commit ab1ad96 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:00:33 2026 +0800 🎨 Sanitize annotations export filename commit 75f7eef Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:00:06 2026 +0800 🎨 Use UUID for temp annotation commit e2537e3 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:31:51 2026 +0800 🎨 Prevent memory leak commit 69bfe0b Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:29:49 2026 +0800 🥅 Guard annotation navigation commit 511a24e Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:20:53 2026 +0800 🎨 Ensures annotations re-rendered when update commit 11a5734 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 10:44:15 2026 +0800 🔒 Truncate annotation text to max length on client side commit f6b262c Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 10:22:44 2026 +0800 🚸 Improve annotation UX commit a208d2e Author: Ng Wing Tat, David <i@ngwingt.at> Date: Wed Feb 25 23:34:22 2026 +0800 🐛 Fix EventListener type mismatch in annotation highlight callback commit a360ab4 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Wed Feb 25 10:30:29 2026 +0800 🎨 Use typed Firestore collection commit 50f1949 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 12 22:52:15 2026 +0800 ✨ Support annotations export commit b5e85f8 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Tue Jan 27 15:41:25 2026 +0800 ✨ Implement annotation feature for EPUB reader

Copilot

Pull request overview

Copilot reviewed 17 out of 19 changed files in this pull request and generated 1 comment.

pages/reader/epub.vue

commit 959d68f Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 17:35:05 2026 +0800 🎨 Update unused function param name commit ff39b68 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 16:51:03 2026 +0800 🎨 Use setHeaders instead of setResponseHeader commit 2745979 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 16:38:10 2026 +0800 🚸 Prevent system menu blocking annotation menu commit 9d36efc Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:37:56 2026 +0800 🐛 Fix annotation modal open when saving failed commit ab1ad96 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:00:33 2026 +0800 🎨 Sanitize annotations export filename commit 75f7eef Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 15:00:06 2026 +0800 🎨 Use UUID for temp annotation commit e2537e3 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:31:51 2026 +0800 🎨 Prevent memory leak commit 69bfe0b Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:29:49 2026 +0800 🥅 Guard annotation navigation commit 511a24e Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 14:20:53 2026 +0800 🎨 Ensures annotations re-rendered when update commit 11a5734 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 10:44:15 2026 +0800 🔒 Truncate annotation text to max length on client side commit f6b262c Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 26 10:22:44 2026 +0800 🚸 Improve annotation UX commit a208d2e Author: Ng Wing Tat, David <i@ngwingt.at> Date: Wed Feb 25 23:34:22 2026 +0800 🐛 Fix EventListener type mismatch in annotation highlight callback commit a360ab4 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Wed Feb 25 10:30:29 2026 +0800 🎨 Use typed Firestore collection commit 50f1949 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Thu Feb 12 22:52:15 2026 +0800 ✨ Support annotations export commit b5e85f8 Author: Ng Wing Tat, David <i@ngwingt.at> Date: Tue Jan 27 15:41:25 2026 +0800 ✨ Implement annotation feature for EPUB reader

Copilot

Pull request overview

Copilot reviewed 17 out of 19 changed files in this pull request and generated 7 comments.

Copilot · 2026-02-26T15:01:49Z

server/api/books/[nftClassId]/annotations/index.post.ts

+  let body: AnnotationCreateData
+  try {
+    body = await readBody(event)
+  }


This handler types body as AnnotationCreateData but doesn’t import that type. If annotation types are module exports (as in shared/types/annotation.d.ts), this will fail typechecking. Import AnnotationCreateData (and any related types) explicitly or define them as ambient types under /types.

Copilot · 2026-02-26T15:01:50Z

components/AnnotationsList.vue

+const props = defineProps<{
+  annotations: Annotation[]
+}>()
+
+const emit = defineEmits<{
+  (e: 'navigate', annotation: Annotation): void
+}>()


This component references Annotation and AnnotationColor in prop and function typing but doesn’t import them. Add explicit type imports from ~/shared/types/annotation (or declare these as ambient types under /types) to avoid TypeScript errors.

Copilot · 2026-02-26T15:01:50Z

components/AnnotationModal.vue

+const props = defineProps<{
+  annotation?: Annotation | null
+  text: string
+  initialColor: AnnotationColor
+  isNewAnnotation?: boolean
+}>()
+
+const emit = defineEmits<{
+  (e: 'save', data: { color: AnnotationColor, note: string }): void
+  (e: 'delete'): void
+}>()


This component uses Annotation/AnnotationColor in props/emits typing without importing them. Unless these are ambient declarations, this will fail nuxt typecheck. Import the types from ~/shared/types/annotation or define them as ambient types under /types (consistent with other globally declared interfaces).

Copilot · 2026-02-26T15:01:51Z

composables/use-annotations.ts

+export default function useAnnotations(params: {
+  nftClassId: Ref<string> | ComputedRef<string> | string
+}) {
+  const { loggedIn: hasLoggedIn } = useUserSession()
+  const nftClassId = computed(() => toValue(params.nftClassId))
+
+  const annotations = ref<Annotation[]>([])
+  const isLoading = ref(false)
+  const hasFetched = ref(false)
+  const fetchPromise = ref<Promise<void> | null>(null)


This composable uses Annotation, AnnotationCreateData, and AnnotationUpdateData without importing them. Unless these are ambient/global types, this will break nuxt typecheck. Import the needed types from ~/shared/types/annotation, or provide a global types/annotation.d.ts ambient declaration that matches the rest of the repo’s type pattern.

Copilot · 2026-02-26T15:01:51Z

server/api/books/[nftClassId]/annotations/[annotationId].post.ts

+  let body: AnnotationUpdateData
+  try {
+    body = await readBody(event)
+  }


This handler types body as AnnotationUpdateData but doesn’t import that type. Add an explicit import type { AnnotationUpdateData } from '~/shared/types/annotation' (or make the annotation types ambient under /types) so nuxt typecheck doesn’t fail.

Copilot · 2026-02-26T15:01:51Z

pages/reader/epub.vue

@@ -365,6 +411,20 @@ const isMobileTocOpen = computed({

 const isPageLoading = ref(false)

+const isAnnotationMenuVisible = ref(false)
+const annotationMenuPosition = ref({ x: 0, y: 0, yBottom: 0 })
+const selectedText = ref('')
+const selectedCfi = ref('')
+const selectedChapterTitle = ref('')
+const isAnnotationModalOpen = ref(false)
+const editingAnnotation = ref<Annotation | null>(null)
+const isNewAnnotation = ref(false)
+const pendingAnnotationColor = ref<AnnotationColor>('yellow')
+const isAnnotationsListOpen = ref(false)
+const isAnnotationClickInProgress = ref(false)
+const pendingSavePromise = ref<Promise<Annotation | null> | null>(null)
+const renderedHighlights = new Set<string>()


This page uses Annotation, AnnotationColor, and AnnotationCreateData types without importing them. Unless they are ambient/global, this will break typechecking. Import the types from ~/shared/types/annotation (preferred if keeping them as module exports), or move them to an ambient /types/annotation.d.ts to match the repo’s existing global-type convention.

Copilot · 2026-02-26T15:01:52Z

constants/annotations.ts

+const ANNOTATION_COLOR_RGB: Record<AnnotationColor, string> = {
+  yellow: '202, 138, 4',
+  red: '220, 38, 38',
+  green: '22, 163, 74',
+  blue: '37, 99, 235',
+}
+
+/**
+ * Valid annotation color values for validation
+ */
+export const ANNOTATION_COLORS = Object.keys(ANNOTATION_COLOR_RGB) as AnnotationColor[]
+


AnnotationColor is referenced but not imported or declared as an ambient type. As written, this will fail TypeScript typechecking unless AnnotationColor is globally declared elsewhere. Either (a) move the annotation types into /types/*.d.ts using declare type/interface (to match existing global type patterns), or (b) add an explicit import type { AnnotationColor } from '~/shared/types/annotation' (and similarly for other annotation types) and use that import consistently.

nwingt requested a review from Copilot January 27, 2026 07:42

Copilot started reviewing on behalf of nwingt January 27, 2026 07:42 View session

Copilot AI reviewed Jan 27, 2026

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nwingt force-pushed the feature/annotation branch from 2755eb5 to 1baa810 Compare January 27, 2026 07:50

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