Main #585
Main #585
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…nd-thumbnail-optimizations Persist media thumbnails and lazy-load editor panels
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WalkthroughReplaces editor panel static imports with dynamic client imports. Adds thumbnail support to storage: new thumbnails adapter, metadata flag, save/load/delete integrations, and a new saveMediaThumbnail API. Media loading now defers video thumbnail generation to background tasks and persists them. Timeline thumbnail sourcing now uses stored mediaFile.thumbnailUrl without preloading all media. Changes
Sequence Diagram(s)sequenceDiagram
autonumber
actor U as User
participant MS as MediaStore
participant SS as StorageService
participant OPFS as Thumbnails Adapter
U->>MS: loadProjectMedia(projectId)
MS->>SS: loadProjectMedia(projectId)
SS-->>MS: mediaFiles (may include thumbnailUrl)
MS-->>U: set mediaFiles immediately (UI renders)
par For each video without thumbnailUrl
MS->>MS: generateThumbnail(item)
MS->>SS: saveMediaThumbnail(projectId, id, blob)
SS->>OPFS: put(thumbnail blob)
SS-->>MS: ack
MS-->>U: update in-memory item.thumbnailUrl
and On errors
MS-->>MS: log warning/error
end
sequenceDiagram
autonumber
participant TS as TimelineStore
participant SS as StorageService
TS->>SS: loadMediaFile(projectId, mediaId)
SS-->>TS: { url, type, thumbnailUrl? }
alt type == "image"
TS-->>TS: use url as thumbnail
else type == "video" and thumbnailUrl exists
TS-->>TS: use thumbnailUrl
else
TS-->>TS: return null (no thumbnail)
end
Estimated code review effort🎯 4 (Complex) | ⏱️ ~60 minutes Poem
✨ Finishing Touches
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Actionable comments posted: 1
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⚠️ Outside diff range comments (1)
apps/web/src/lib/storage/storage-service.ts (1)
132-169: Avoid metadata/thumb drift; set hasThumbnail only after persistence succeeds.Currently hasThumbnail is derived from a runtime URL; if fetch/set fails, metadata stays true while no blob exists. Flip the order and update after success. Also check Response.ok before reading the blob.
// Save metadata to project-specific IndexedDB - const metadata: MediaFileData = { + const metadata: MediaFileData = { id: mediaItem.id, name: mediaItem.name, type: mediaItem.type, size: mediaItem.file.size, lastModified: mediaItem.file.lastModified, width: mediaItem.width, height: mediaItem.height, duration: mediaItem.duration, ephemeral: mediaItem.ephemeral, - hasThumbnail: Boolean(mediaItem.thumbnailUrl), + // Only mark true after we persist the blob successfully + hasThumbnail: false, }; await mediaMetadataAdapter.set(mediaItem.id, metadata); - if (mediaItem.thumbnailUrl) { + if (mediaItem.thumbnailUrl) { try { - const res = await fetch(mediaItem.thumbnailUrl); + const res = await fetch(mediaItem.thumbnailUrl); + if (!res.ok) throw new Error(`Thumbnail fetch failed: ${res.status}`); const blob = await res.blob(); const thumbFile = new File([blob], `${mediaItem.id}.jpg`, { type: blob.type || "image/jpeg", }); await mediaThumbnailsAdapter.set(mediaItem.id, thumbFile); + await mediaMetadataAdapter.set(mediaItem.id, { + ...metadata, + hasThumbnail: true, + }); } catch (e) { console.error("Failed to persist media thumbnail:", e); } }
🧹 Nitpick comments (5)
apps/web/src/lib/storage/types.ts (1)
23-25: Clarify persistence semantics of hasThumbnail.Add a short doc so callers know this flag means “persisted in OPFS,” not just “had a runtime data URL.”
export interface MediaFileData { id: string; name: string; type: "image" | "video" | "audio"; size: number; lastModified: number; width?: number; height?: number; duration?: number; ephemeral?: boolean; sourceStickerIconName?: string; + /** True only when a thumbnail blob has been persisted in OPFS for this item. */ hasThumbnail?: boolean; // File will be stored separately in OPFS }apps/web/src/app/editor/[project_id]/page.tsx (2)
11-14: Remove commented-out static imports.Dead commented code adds noise.
-// import { MediaPanel } from "@/components/editor/media-panel"; -// import { PropertiesPanel } from "@/components/editor/properties-panel"; -// import { Timeline } from "@/components/editor/timeline"; -// import { PreviewPanel } from "@/components/editor/preview-panel";
22-49: DRY the dynamic() boilerplate (optional).A tiny helper eliminates repetition across the four panels.
+const clientOnly = ( + loader: () => Promise<{ default: React.ComponentType<any> }> +) => dynamic(loader, { ssr: false, loading: () => <div className="w-full h-full bg-panel" /> }); + -const Timeline = dynamic( - () => - import("@/components/editor/timeline").then((m) => ({ - default: m.Timeline, - })), - { ssr: false, loading: () => <div className="w-full h-full bg-panel" /> } -); +const Timeline = clientOnly(() => + import("@/components/editor/timeline").then((m) => ({ default: m.Timeline })) +); -const PreviewPanel = dynamic( - () => - import("@/components/editor/preview-panel").then((m) => ({ - default: m.PreviewPanel, - })), - { ssr: false, loading: () => <div className="w-full h-full bg-panel" /> } -); +const PreviewPanel = clientOnly(() => + import("@/components/editor/preview-panel").then((m) => ({ default: m.PreviewPanel })) +); -const MediaPanel = dynamic( - () => - import("@/components/editor/media-panel").then((m) => ({ - default: m.MediaPanel, - })), - { ssr: false, loading: () => <div className="w-full h-full bg-panel" /> } -); +const MediaPanel = clientOnly(() => + import("@/components/editor/media-panel").then((m) => ({ default: m.MediaPanel })) +); -const PropertiesPanel = dynamic( - () => - import("@/components/editor/properties-panel").then((m) => ({ - default: m.PropertiesPanel, - })), - { ssr: false, loading: () => <div className="w-full h-full bg-panel" /> } -); +const PropertiesPanel = clientOnly(() => + import("@/components/editor/properties-panel").then((m) => ({ default: m.PropertiesPanel })) +);apps/web/src/stores/timeline-store.ts (1)
1243-1251: Potential object URL lifetime leak.loadMediaFile returns a blob URL for stored thumbnails; getProjectThumbnail forwards it. Nothing revokes that URL later. Consider returning a cached URL + a dispose, or documenting that the consumer must revoke. Alternatively, add a tiny cache in storageService for project thumbnails and revoke on next refresh.
apps/web/src/lib/storage/storage-service.ts (1)
275-293: Thumb save API is clear; consider idempotence note.If called repeatedly it overwrites, which is fine. Optionally short-circuit when identical sizes or hashes match, but not required now.
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📒 Files selected for processing (5)
apps/web/src/app/editor/[project_id]/page.tsx(1 hunks)apps/web/src/lib/storage/storage-service.ts(6 hunks)apps/web/src/lib/storage/types.ts(1 hunks)apps/web/src/stores/media-store.ts(1 hunks)apps/web/src/stores/timeline-store.ts(2 hunks)
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**/*.{ts,tsx}
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Files:
apps/web/src/lib/storage/types.tsapps/web/src/stores/media-store.tsapps/web/src/app/editor/[project_id]/page.tsxapps/web/src/lib/storage/storage-service.tsapps/web/src/stores/timeline-store.ts
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Files:
apps/web/src/lib/storage/types.tsapps/web/src/stores/media-store.tsapps/web/src/app/editor/[project_id]/page.tsxapps/web/src/lib/storage/storage-service.tsapps/web/src/stores/timeline-store.ts
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Avoid unused imports and variables
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Put default function parameters and optional function parameters last
Use new when throwing an error
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Files:
apps/web/src/lib/storage/types.tsapps/web/src/stores/media-store.tsapps/web/src/app/editor/[project_id]/page.tsxapps/web/src/lib/storage/storage-service.tsapps/web/src/stores/timeline-store.ts
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Files:
apps/web/src/app/editor/[project_id]/page.tsx
**/*.{tsx,jsx}
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Files:
apps/web/src/app/editor/[project_id]/page.tsx
🧬 Code graph analysis (3)
apps/web/src/stores/media-store.ts (2)
apps/web/src/lib/storage/opfs-adapter.ts (1)
set(30-37)apps/web/src/lib/storage/indexeddb-adapter.ts (1)
set(42-52)
apps/web/src/app/editor/[project_id]/page.tsx (4)
apps/web/src/components/editor/timeline/index.tsx (1)
Timeline(71-910)apps/web/src/components/editor/preview-panel.tsx (1)
PreviewPanel(39-664)apps/web/src/components/editor/media-panel/index.tsx (1)
MediaPanel(13-52)apps/web/src/components/editor/properties-panel/index.tsx (1)
PropertiesPanel(11-53)
apps/web/src/lib/storage/storage-service.ts (2)
apps/web/src/lib/storage/opfs-adapter.ts (1)
OPFSAdapter(3-73)apps/web/src/types/media.ts (1)
MediaFile(4-17)
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- GitHub Check: Vade Review
🔇 Additional comments (7)
apps/web/src/app/editor/[project_id]/page.tsx (1)
22-49: Client-only dynamic panels look good.Correct use of next/dynamic with ssr: false and simple fallbacks.
apps/web/src/stores/timeline-store.ts (1)
1234-1235: Graceful null check on timeline load.Returning null when no stored tracks is fine.
apps/web/src/lib/storage/storage-service.ts (3)
49-55: Adapters composition looks solid.Per-project OPFS dir for files and thumbnails + IndexedDB for metadata is a good split.
205-216: Good: tolerant load when thumb metadata is stale.Warn and continue if the thumb blob is missing.
247-258: Atomic deletion across stores looks good.OPFSAdapter.remove already ignores NotFound; Promise.all keeps it fast.
apps/web/src/stores/media-store.ts (2)
229-231: Fast-path state set is the right UX tradeoff.Immediate render with persisted data keeps UI snappy.
260-261: Background execution via allSettled is appropriate.Non-blocking thumbnail enrichment matches the new flow.
| const missing = mediaItems.filter( | ||
| (item) => item.type === "video" && !item.thumbnailUrl && item.file | ||
| ); | ||
|
|
||
| const tasks = missing.map((item) => | ||
| (async () => { | ||
| try { | ||
| const { thumbnailUrl } = await generateVideoThumbnail(item.file); | ||
| const res = await fetch(thumbnailUrl); | ||
| const blob = await res.blob(); | ||
|
|
||
| await storageService.saveMediaThumbnail(projectId, item.id, blob); | ||
|
|
||
| set((state) => ({ | ||
| mediaFiles: state.mediaFiles.map((m) => | ||
| m.id === item.id ? { ...m, thumbnailUrl } : m | ||
| ), | ||
| })); | ||
| } catch (error) { | ||
| console.error( | ||
| `Failed to generate thumbnail for video ${item.id}:`, | ||
| error | ||
| ); | ||
| } | ||
| return item; | ||
| }) | ||
| })() | ||
| ); |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Don’t gate in-memory thumbnail update on persistence.
If OPFS isn’t available (Safari/older browsers) saveMediaThumbnail will fail and you’ll never display the generated thumbnail. Update state regardless; keep persistence best-effort.
- const tasks = missing.map((item) =>
- (async () => {
- try {
- const { thumbnailUrl } = await generateVideoThumbnail(item.file);
- const res = await fetch(thumbnailUrl);
- const blob = await res.blob();
-
- await storageService.saveMediaThumbnail(projectId, item.id, blob);
-
- set((state) => ({
- mediaFiles: state.mediaFiles.map((m) =>
- m.id === item.id ? { ...m, thumbnailUrl } : m
- ),
- }));
- } catch (error) {
- console.error(
- `Failed to generate thumbnail for video ${item.id}:`,
- error
- );
- }
- })()
- );
+ const tasks = missing.map((item) =>
+ (async () => {
+ const { thumbnailUrl } = await generateVideoThumbnail(item.file);
+ try {
+ const res = await fetch(thumbnailUrl);
+ const blob = await res.blob();
+ await storageService.saveMediaThumbnail(projectId, item.id, blob);
+ } catch (error) {
+ console.error(
+ `Failed to generate thumbnail for video ${item.id}:`,
+ error
+ );
+ } finally {
+ set((state) => ({
+ mediaFiles: state.mediaFiles.map((m) =>
+ m.id === item.id ? { ...m, thumbnailUrl } : m
+ ),
+ }));
+ }
+ })()
+ );📝 Committable suggestion
‼️ 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.
| const missing = mediaItems.filter( | |
| (item) => item.type === "video" && !item.thumbnailUrl && item.file | |
| ); | |
| const tasks = missing.map((item) => | |
| (async () => { | |
| try { | |
| const { thumbnailUrl } = await generateVideoThumbnail(item.file); | |
| const res = await fetch(thumbnailUrl); | |
| const blob = await res.blob(); | |
| await storageService.saveMediaThumbnail(projectId, item.id, blob); | |
| set((state) => ({ | |
| mediaFiles: state.mediaFiles.map((m) => | |
| m.id === item.id ? { ...m, thumbnailUrl } : m | |
| ), | |
| })); | |
| } catch (error) { | |
| console.error( | |
| `Failed to generate thumbnail for video ${item.id}:`, | |
| error | |
| ); | |
| } | |
| return item; | |
| }) | |
| })() | |
| ); | |
| const missing = mediaItems.filter( | |
| (item) => item.type === "video" && !item.thumbnailUrl && item.file | |
| ); | |
| const tasks = missing.map((item) => | |
| (async () => { | |
| const { thumbnailUrl } = await generateVideoThumbnail(item.file); | |
| try { | |
| const res = await fetch(thumbnailUrl); | |
| const blob = await res.blob(); | |
| await storageService.saveMediaThumbnail(projectId, item.id, blob); | |
| } catch (error) { | |
| console.error( | |
| `Failed to generate thumbnail for video ${item.id}:`, | |
| error | |
| ); | |
| } finally { | |
| set((state) => ({ | |
| mediaFiles: state.mediaFiles.map((m) => | |
| m.id === item.id ? { ...m, thumbnailUrl } : m | |
| ), | |
| })); | |
| } | |
| })() | |
| ); |
🤖 Prompt for AI Agents
In apps/web/src/stores/media-store.ts around lines 233 to 258, the current flow
waits for storageService.saveMediaThumbnail to succeed before updating in-memory
state, which means a failed persistence (e.g. OPFS absent) prevents the
generated thumbnail from being shown; change the order so you immediately update
state with the new thumbnailUrl (set state before attempting persistence) and
then call saveMediaThumbnail as a best-effort asynchronous operation inside its
own try/catch so failures are logged but do not prevent UI update.
![vercel[bot]](https://avatars.githubusercontent.com/in/8329?s=60&v=4){kind=small}
| ); | ||
| return item; | ||
| } | ||
| // Fast path: immediately set items (use persisted thumbnails if available) |
There was a problem hiding this comment.
Memory leak in generateVideoThumbnail function - the object URL created for the video element is never revoked, causing memory to accumulate with each thumbnail generation.
View Details
📝 Patch Details
diff --git a/apps/web/src/stores/media-store.ts b/apps/web/src/stores/media-store.ts
index 0e2add9..0244aa0 100644
--- a/apps/web/src/stores/media-store.ts
+++ b/apps/web/src/stores/media-store.ts
@@ -47,11 +47,13 @@ export const getImageDimensions = (
const width = img.naturalWidth;
const height = img.naturalHeight;
resolve({ width, height });
+ URL.revokeObjectURL(img.src);
img.remove();
});
img.addEventListener("error", () => {
reject(new Error("Could not load image"));
+ URL.revokeObjectURL(img.src);
img.remove();
});
@@ -90,12 +92,14 @@ export const generateVideoThumbnail = (
resolve({ thumbnailUrl, width, height });
// Cleanup
+ URL.revokeObjectURL(video.src);
video.remove();
canvas.remove();
});
video.addEventListener("error", () => {
reject(new Error("Could not load video"));
+ URL.revokeObjectURL(video.src);
video.remove();
canvas.remove();
});
@@ -114,11 +118,13 @@ export const getMediaDuration = (file: File): Promise<number> => {
element.addEventListener("loadedmetadata", () => {
resolve(element.duration);
+ URL.revokeObjectURL(element.src);
element.remove();
});
element.addEventListener("error", () => {
reject(new Error("Could not load media"));
+ URL.revokeObjectURL(element.src);
element.remove();
});
Analysis
The generateVideoThumbnail function creates an object URL on line 103 using URL.createObjectURL(file) to load the video for thumbnail generation, but this URL is never revoked with URL.revokeObjectURL().
Object URLs consume memory until they are explicitly revoked or the document is closed. Since this function is called in background tasks for each video file that needs a thumbnail generated (line 240), and potentially multiple times during a user session, this will cause memory to accumulate over time.
The cleanup code on lines 93-94 and 99-100 only removes the DOM elements but doesn't handle the object URL cleanup. The fix is to add URL.revokeObjectURL(video.src) before removing the video element in both the success and error cleanup paths.
This memory leak will be particularly problematic in long-running editor sessions where users work with multiple video files, as each thumbnail generation will leave behind an unreleased object URL.
Description
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Summary by CodeRabbit
New Features
Refactor