# Tasks: enterprise-react-file-upload

**Change ID**: enterprise-react-file-upload
**Package**: `@suaveplan/react-file-upload`
**Target path**: `react/media/react-file-upload`
**Prerequisite packages on Verdaccio**: `@suaveplan/error`, `@suaveplan/mime`, `@suaveplan/react-translate`

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## 0. Pre-flight (non-negotiable)

- [ ] 0.1 Confirm clean working tree (`git status` reports nothing) and no in-flight worktrees with uncommitted work (`git worktree list` then `git status` in each)
- [ ] 0.2 If any worktrees exist under `.claude/worktrees/`, account for each one: still-active agent, work-pending-merge, or stale-and-prune. Stale worktrees MUST be removed (`git worktree remove`) before opening a new one — code that has been lost twice on main is the failure mode this guards against.
- [ ] 0.3 Confirm the package set in `MANIFEST.md` matches `find packages -maxdepth 3 -name package.json` count. Drift here means a prior change archived without regenerating the manifest.

## 1. Scaffold

- [ ] Create directory tree. Write `package.json` at `0.1.0`, `tsconfig.json`, `vitest.config.ts`, scripts.
- [ ] Dependencies: `@suaveplan/error workspace:^`, `@suaveplan/mime workspace:^`, `@suaveplan/react-translate workspace:^`, `zod catalog:forms`, `@opentelemetry/api catalog:observability`, `tslib catalog:build`.

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## 2. Error codes and types

- [ ] Define `FileUploadError`; codes: `FILE_UPLOAD_VALIDATION_FAILED`, `FILE_UPLOAD_CHUNK_FAILED`, `FILE_UPLOAD_NETWORK_ERROR`.
- [ ] Define `FileState`, `ChunkState`, `UploadOptions`, `DropzoneOptions`, `UploadStatus`.

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## 3. Upload engine

- [ ] `createFileState(file: File): FileState`.
- [ ] `splitFileIntoChunks(file, chunkSize): Blob[]`.
- [ ] `validateFile(file, options)` — checks size, MIME via `@suaveplan/mime` `matchesMimePattern`. Throws `FileUploadError(FILE_UPLOAD_VALIDATION_FAILED)` on failure.
- [ ] `matchesMimePattern(file, pattern)` — delegates to `@suaveplan/mime`.
- [ ] `createPreviewUrl(file): string`, `revokePreviewUrl(url): void` — `URL.createObjectURL` / `revokeObjectURL`.
- [ ] `formatBytes(bytes): string`, `calculateProgress(chunks): number`, `isImageFile(file): boolean`.
- [ ] Write `upload-engine.test.ts` (≤500 lines): all functions. `{ timeout: 5000 }`.
- [ ] Write `upload-engine.md`.

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## 4. Hooks

### `useDropzone`

- [ ] HTML5 drag events + click-to-browse; `onDrop(files: File[])`, `isDragging`, `rootProps`, `inputProps`.
- [ ] A11y: `role="button"`, `aria-label`, keyboard Enter/Space opens file picker.
- [ ] Write `use-dropzone.test.tsx` + md.

### `useFileUpload`

- [ ] Manages `files: FileState[]`, chunked upload (configurable `concurrency`, `chunkSize`), `upload(files)`, `cancel(id)`, `retry(id)`, `remove(id)`. Injectable `uploadFn(chunk, metadata)`.
- [ ] Throws `FileUploadError(FILE_UPLOAD_CHUNK_FAILED)` on chunk failure; auto-retries up to `maxRetries`.
- [ ] OTel `file_upload.complete` span on each file completion.
- [ ] Write `use-file-upload.test.ts` (≤500 lines): upload, progress, cancel, retry. `{ timeout: 10000 }`.
- [ ] Write `use-file-upload.md`.

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## 5. Components

### Dropzone

- [ ] Uses `useDropzone`; renders drag-target area with i18n copy.
- [ ] Write test + stories (default, dragging, with-accepted-types, playground) + md.

### FileList

- [ ] Renders `FileState[]` with name, size, progress, cancel/retry buttons.
- [ ] Write test + stories + md.

### ProgressBar

- [ ] Single-file progress bar component.
- [ ] Write test + stories + md.

### FileUpload (composite)

- [ ] Composes `Dropzone + FileList + ProgressBar`.
- [ ] Write test + stories (default, uploading, complete, error, playground) + md.

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## 6. E2E

- [ ] `e2e/file-upload.spec.ts` — Playwright:
  - Use `page.setInputFiles` to upload a file → progress bar appears.
  - Progress reaches 100% → complete state shown.
  - Click cancel during upload → file marked cancelled.

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## 7. Verify and publish

- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/react-file-upload` — green.
- [ ] `bunx turbo test:coverage --filter=@suaveplan/react-file-upload` — 100%.
- [ ] `bun scripts/publish.ts --package @suaveplan/react-file-upload`.
- [ ] Archive change folder.