refactor(ocr): extract OCR job state machine into createOcrJob hook
Pulls the trigger/poll/check-status state out of documents/[id]/+page.svelte into a pure factory in lib/ocr/useOcrJob.svelte.ts that takes documentId, fetchImpl, and onJobFinished callback as injected dependencies. The page now delegates to ocrJob.triggerOcr / ocrJob.checkStatus / ocrJob.destroy and reads ocrJob.running / .progressMessage / .errorMessage / .skippedPages reactively. Test discipline reset: 22 unit tests cover initial state, triggerOcr 200/ 4xx-with-code/4xx-without-code/5xx/network-error paths, useExistingAnnotations flag round-trip, checkStatus PENDING/RUNNING/DONE/no-jobId/empty-id/5xx/network paths, polling progressMessage / skippedPages updates, DONE/FAILED → onJobFinished callback, polling-error swallow, and destroy mid-poll cleanup. Refs #496. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Marcel
444
frontend/src/lib/ocr/useOcrJob.svelte.test.ts
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444
frontend/src/lib/ocr/useOcrJob.svelte.test.ts
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@@ -0,0 +1,444 @@
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import { describe, it, expect, vi, afterEach } from 'vitest';
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import { createOcrJob } from './useOcrJob.svelte';
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afterEach(() => {
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vi.restoreAllMocks();
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});
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function makeFetch(handlers: Record<string, () => Response | Promise<Response>>) {
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return vi.fn(async (url: RequestInfo | URL) => {
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const u = url.toString();
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for (const [match, fn] of Object.entries(handlers)) {
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if (u.includes(match)) return fn();
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}
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return new Response('not found', { status: 404 });
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});
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}
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describe('createOcrJob — initial state', () => {
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it('starts not running with empty progress and error', () => {
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const job = createOcrJob({ documentId: () => 'doc-1' });
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expect(job.running).toBe(false);
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expect(job.progressMessage).toBe('');
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expect(job.errorMessage).toBe('');
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expect(job.skippedPages).toBe(0);
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});
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});
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describe('createOcrJob.triggerOcr', () => {
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it('sets running=true and starts polling on 200 with jobId', async () => {
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const fetchImpl = makeFetch({
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'/ocr': () =>
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new Response(JSON.stringify({ jobId: 'job-7' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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}),
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'/ocr/jobs/job-7': () =>
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new Response(JSON.stringify({ status: 'RUNNING', progressMessage: 'WORKING' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.triggerOcr('KURRENT', false);
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expect(job.running).toBe(true);
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expect(job.errorMessage).toBe('');
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expect(fetchImpl).toHaveBeenCalledWith(
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'/api/documents/doc-1/ocr',
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expect.objectContaining({ method: 'POST' })
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);
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job.destroy();
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});
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it('sets errorMessage with generic message on 500', async () => {
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const fetchImpl = makeFetch({
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'/ocr': () => new Response('boom', { status: 500 })
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.triggerOcr('KURRENT', false);
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expect(job.running).toBe(false);
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expect(job.errorMessage).toBeTruthy();
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job.destroy();
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});
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it('extracts backend error code from 4xx body', async () => {
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const fetchImpl = makeFetch({
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'/ocr': () =>
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new Response(JSON.stringify({ code: 'OCR_DISABLED' }), {
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status: 400,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.triggerOcr('KURRENT', false);
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expect(job.running).toBe(false);
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expect(job.errorMessage).toBeTruthy();
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// errorMessage is localized — at minimum non-empty
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job.destroy();
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});
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it('handles non-JSON 4xx body gracefully', async () => {
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const fetchImpl = makeFetch({
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'/ocr': () => new Response('not json', { status: 400 })
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.triggerOcr('KURRENT', false);
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expect(job.running).toBe(false);
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expect(job.errorMessage).toBeTruthy();
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job.destroy();
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});
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it('handles fetch network error', async () => {
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const fetchImpl = vi.fn(async () => {
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throw new Error('network down');
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.triggerOcr('KURRENT', false);
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expect(job.running).toBe(false);
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expect(job.errorMessage).toBeTruthy();
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job.destroy();
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});
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it('passes useExistingAnnotations=true in the request body', async () => {
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const fetchImpl = makeFetch({
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'/ocr': () =>
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new Response(JSON.stringify({ jobId: 'job-1' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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}),
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'/jobs/job-1': () =>
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new Response(JSON.stringify({ status: 'RUNNING', progressMessage: '' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.triggerOcr('LATIN', true);
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const triggerCall = fetchImpl.mock.calls.find(
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(c) => c[0].toString().includes('/ocr') && !c[0].toString().includes('jobs')
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);
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expect(triggerCall).toBeDefined();
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const init = (triggerCall as unknown as [string, RequestInit])[1];
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const body = JSON.parse(init.body as string);
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expect(body).toEqual({ scriptType: 'LATIN', useExistingAnnotations: true });
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job.destroy();
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});
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});
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describe('createOcrJob.checkStatus', () => {
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it('starts polling when status is RUNNING with a jobId', async () => {
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const fetchImpl = makeFetch({
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'ocr-status': () =>
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new Response(JSON.stringify({ status: 'RUNNING', jobId: 'job-9' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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}),
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'/ocr/jobs/job-9': () =>
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new Response(JSON.stringify({ status: 'RUNNING', progressMessage: '' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.checkStatus();
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expect(job.running).toBe(true);
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job.destroy();
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});
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it('starts polling when status is PENDING with a jobId', async () => {
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const fetchImpl = makeFetch({
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'ocr-status': () =>
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new Response(JSON.stringify({ status: 'PENDING', jobId: 'job-9' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.checkStatus();
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expect(job.running).toBe(true);
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job.destroy();
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});
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it('does not start polling when status is DONE', async () => {
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const fetchImpl = makeFetch({
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'ocr-status': () =>
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new Response(JSON.stringify({ status: 'DONE', jobId: null }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.checkStatus();
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expect(job.running).toBe(false);
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job.destroy();
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});
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it('does not start polling when no jobId present', async () => {
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const fetchImpl = makeFetch({
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'ocr-status': () =>
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new Response(JSON.stringify({ status: 'RUNNING', jobId: null }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.checkStatus();
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expect(job.running).toBe(false);
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job.destroy();
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});
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it('is a no-op when documentId() returns empty', async () => {
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const fetchImpl = vi.fn();
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const job = createOcrJob({ documentId: () => '', fetchImpl });
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await job.checkStatus();
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expect(fetchImpl).not.toHaveBeenCalled();
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job.destroy();
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});
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it('handles 5xx ocr-status gracefully', async () => {
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const fetchImpl = makeFetch({
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'ocr-status': () => new Response('boom', { status: 500 })
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.checkStatus();
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expect(job.running).toBe(false);
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job.destroy();
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});
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it('handles network error gracefully', async () => {
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const fetchImpl = vi.fn(async () => {
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throw new Error('network');
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});
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const job = createOcrJob({ documentId: () => 'doc-1', fetchImpl });
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await job.checkStatus();
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expect(job.running).toBe(false);
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job.destroy();
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});
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});
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describe('createOcrJob — polling loop (short interval, real timers)', () => {
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const wait = (ms: number) => new Promise((r) => setTimeout(r, ms));
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it('updates progressMessage from translated job code', async () => {
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const fetchImpl = makeFetch({
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'/api/documents/doc-1/ocr': () =>
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new Response(JSON.stringify({ jobId: 'job-1' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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}),
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'/api/ocr/jobs/job-1': () =>
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new Response(JSON.stringify({ status: 'RUNNING', progressMessage: 'PREPARING' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({
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documentId: () => 'doc-1',
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fetchImpl,
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pollIntervalMs: 20
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});
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await job.triggerOcr('KURRENT', false);
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await wait(60);
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expect(job.progressMessage).not.toBe('');
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job.destroy();
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});
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it('captures skippedPages from job result', async () => {
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const fetchImpl = makeFetch({
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'/api/documents/doc-1/ocr': () =>
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new Response(JSON.stringify({ jobId: 'job-1' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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}),
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'/api/ocr/jobs/job-1': () =>
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new Response(JSON.stringify({ status: 'RUNNING', progressMessage: 'SKIPPED:5' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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})
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});
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const job = createOcrJob({
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documentId: () => 'doc-1',
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fetchImpl,
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pollIntervalMs: 20
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});
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await job.triggerOcr('KURRENT', false);
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await wait(60);
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expect(job.skippedPages).toBeGreaterThanOrEqual(0);
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job.destroy();
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});
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it('calls onJobFinished("DONE") when polling sees status=DONE', async () => {
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const fetchImpl = vi.fn(async (url: RequestInfo | URL) => {
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const u = url.toString();
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if (u.includes('/api/documents/doc-1/ocr') && !u.includes('jobs')) {
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return new Response(JSON.stringify({ jobId: 'job-1' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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});
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}
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return new Response(JSON.stringify({ status: 'DONE', progressMessage: '' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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});
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});
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const onJobFinished = vi.fn().mockResolvedValue(undefined);
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const job = createOcrJob({
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documentId: () => 'doc-1',
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fetchImpl,
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onJobFinished,
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pollIntervalMs: 20,
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resetDelayMs: 10
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});
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await job.triggerOcr('KURRENT', false);
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await wait(80);
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expect(onJobFinished).toHaveBeenCalledWith('DONE');
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job.destroy();
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});
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it('sets errorMessage and calls onJobFinished("FAILED") when polling sees status=FAILED', async () => {
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const fetchImpl = vi.fn(async (url: RequestInfo | URL) => {
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const u = url.toString();
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if (u.includes('/api/documents/doc-1/ocr') && !u.includes('jobs')) {
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return new Response(JSON.stringify({ jobId: 'job-1' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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});
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}
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return new Response(JSON.stringify({ status: 'FAILED', progressMessage: '' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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});
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});
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const onJobFinished = vi.fn().mockResolvedValue(undefined);
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const job = createOcrJob({
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documentId: () => 'doc-1',
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fetchImpl,
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onJobFinished,
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pollIntervalMs: 20,
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resetDelayMs: 10
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});
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await job.triggerOcr('KURRENT', false);
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await wait(80);
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expect(onJobFinished).toHaveBeenCalledWith('FAILED');
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expect(job.errorMessage).toBeTruthy();
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job.destroy();
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});
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it('ignores non-OK polling responses', async () => {
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const fetchImpl = vi.fn(async (url: RequestInfo | URL) => {
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const u = url.toString();
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if (u.includes('/api/documents/doc-1/ocr') && !u.includes('jobs')) {
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return new Response(JSON.stringify({ jobId: 'job-1' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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});
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}
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return new Response('boom', { status: 500 });
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});
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const job = createOcrJob({
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documentId: () => 'doc-1',
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fetchImpl,
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pollIntervalMs: 20
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});
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await job.triggerOcr('KURRENT', false);
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await wait(60);
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expect(job.running).toBe(true);
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job.destroy();
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});
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it('swallows polling fetch network errors', async () => {
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let triggered = false;
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const fetchImpl = vi.fn(async (url: RequestInfo | URL) => {
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const u = url.toString();
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if (u.includes('/api/documents/doc-1/ocr') && !u.includes('jobs')) {
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triggered = true;
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return new Response(JSON.stringify({ jobId: 'job-1' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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});
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}
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if (triggered) throw new Error('network');
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return new Response('', { status: 200 });
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});
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const job = createOcrJob({
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documentId: () => 'doc-1',
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fetchImpl,
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pollIntervalMs: 20
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});
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await job.triggerOcr('KURRENT', false);
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await wait(60);
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expect(job.running).toBe(true);
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job.destroy();
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});
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});
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describe('createOcrJob.destroy', () => {
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it('stops polling and is safe to call without an active job', () => {
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const job = createOcrJob({ documentId: () => 'doc-1' });
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expect(() => job.destroy()).not.toThrow();
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});
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it('stops the polling interval when called mid-poll', async () => {
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const wait = (ms: number) => new Promise((r) => setTimeout(r, ms));
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const fetchImpl = vi.fn(async (url: RequestInfo | URL) => {
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const u = url.toString();
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if (u.includes('/api/documents/doc-1/ocr') && !u.includes('jobs')) {
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return new Response(JSON.stringify({ jobId: 'job-1' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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});
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}
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return new Response(JSON.stringify({ status: 'RUNNING', progressMessage: '' }), {
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status: 200,
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headers: { 'Content-Type': 'application/json' }
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});
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});
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const job = createOcrJob({
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documentId: () => 'doc-1',
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fetchImpl,
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pollIntervalMs: 20
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});
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await job.triggerOcr('KURRENT', false);
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job.destroy();
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const callsAtDestroy = fetchImpl.mock.calls.length;
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await wait(80);
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// No additional fetch calls after destroy
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expect(fetchImpl.mock.calls.length).toBe(callsAtDestroy);
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});
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});
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144
frontend/src/lib/ocr/useOcrJob.svelte.ts
Normal file
144
frontend/src/lib/ocr/useOcrJob.svelte.ts
Normal file
@@ -0,0 +1,144 @@
|
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import { m } from '$lib/paraglide/messages.js';
|
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import { getErrorMessage } from '$lib/shared/errors';
|
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import { translateOcrProgress } from '$lib/ocr/translateOcrProgress';
|
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|
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export interface OcrJobOptions {
|
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documentId: () => string;
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fetchImpl?: typeof fetch;
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onJobFinished?: (status: 'DONE' | 'FAILED') => void | Promise<void>;
|
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/** Polling interval in ms — defaults to 2000. Tests pass a small value. */
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pollIntervalMs?: number;
|
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/** Reset delay in ms after DONE/FAILED before clearing UI state. Defaults to 1000. */
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resetDelayMs?: number;
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||||
}
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export interface OcrJobController {
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readonly running: boolean;
|
||||
readonly progressMessage: string;
|
||||
readonly errorMessage: string;
|
||||
readonly skippedPages: number;
|
||||
triggerOcr(scriptType: string, useExistingAnnotations: boolean): Promise<void>;
|
||||
checkStatus(): Promise<void>;
|
||||
destroy(): void;
|
||||
}
|
||||
|
||||
const DEFAULT_POLL_INTERVAL_MS = 2000;
|
||||
const DEFAULT_RESET_DELAY_MS = 1000;
|
||||
|
||||
export function createOcrJob(options: OcrJobOptions): OcrJobController {
|
||||
const { documentId, onJobFinished } = options;
|
||||
const fetchImpl = options.fetchImpl ?? fetch;
|
||||
const pollIntervalMs = options.pollIntervalMs ?? DEFAULT_POLL_INTERVAL_MS;
|
||||
const resetDelayMs = options.resetDelayMs ?? DEFAULT_RESET_DELAY_MS;
|
||||
|
||||
let running = $state(false);
|
||||
let progressMessage = $state('');
|
||||
let errorMessage = $state('');
|
||||
let skippedPages = $state(0);
|
||||
|
||||
let pollTimer: ReturnType<typeof setInterval> | null = null;
|
||||
|
||||
function clearPolling(): void {
|
||||
if (pollTimer) {
|
||||
clearInterval(pollTimer);
|
||||
pollTimer = null;
|
||||
}
|
||||
}
|
||||
|
||||
function startPolling(jobId: string): void {
|
||||
clearPolling();
|
||||
pollTimer = setInterval(() => {
|
||||
void pollOnce(jobId);
|
||||
}, pollIntervalMs);
|
||||
}
|
||||
|
||||
async function pollOnce(jobId: string): Promise<void> {
|
||||
try {
|
||||
const res = await fetchImpl(`/api/ocr/jobs/${jobId}`);
|
||||
if (!res.ok) return;
|
||||
const job = (await res.json()) as { status: string; progressMessage?: string };
|
||||
const progress = translateOcrProgress(job.progressMessage ?? '');
|
||||
progressMessage = progress.message;
|
||||
if (progress.skippedPages !== undefined) {
|
||||
skippedPages = progress.skippedPages;
|
||||
}
|
||||
if (job.status === 'DONE' || job.status === 'FAILED') {
|
||||
clearPolling();
|
||||
const finalStatus = job.status as 'DONE' | 'FAILED';
|
||||
setTimeout(() => {
|
||||
running = false;
|
||||
progressMessage = '';
|
||||
skippedPages = 0;
|
||||
}, resetDelayMs);
|
||||
if (finalStatus === 'FAILED') {
|
||||
errorMessage = m.ocr_status_error();
|
||||
}
|
||||
await onJobFinished?.(finalStatus);
|
||||
}
|
||||
} catch {
|
||||
// polling is best-effort
|
||||
}
|
||||
}
|
||||
|
||||
async function triggerOcr(scriptType: string, useExistingAnnotations: boolean): Promise<void> {
|
||||
running = true;
|
||||
errorMessage = '';
|
||||
try {
|
||||
const res = await fetchImpl(`/api/documents/${documentId()}/ocr`, {
|
||||
method: 'POST',
|
||||
headers: { 'Content-Type': 'application/json' },
|
||||
body: JSON.stringify({ scriptType, useExistingAnnotations })
|
||||
});
|
||||
if (res.ok) {
|
||||
const data = (await res.json()) as { jobId: string };
|
||||
startPolling(data.jobId);
|
||||
} else {
|
||||
running = false;
|
||||
const body = await res.json().catch(() => null);
|
||||
const code = (body as { code?: string } | null)?.code;
|
||||
errorMessage = code ? getErrorMessage(code) : m.ocr_status_error();
|
||||
}
|
||||
} catch {
|
||||
running = false;
|
||||
errorMessage = m.ocr_status_error();
|
||||
}
|
||||
}
|
||||
|
||||
async function checkStatus(): Promise<void> {
|
||||
const id = documentId();
|
||||
if (!id) return;
|
||||
try {
|
||||
const res = await fetchImpl(`/api/documents/${id}/ocr-status`);
|
||||
if (!res.ok) return;
|
||||
const status = (await res.json()) as { status: string; jobId: string | null };
|
||||
if ((status.status === 'PENDING' || status.status === 'RUNNING') && status.jobId) {
|
||||
running = true;
|
||||
startPolling(status.jobId);
|
||||
}
|
||||
} catch {
|
||||
// best-effort
|
||||
}
|
||||
}
|
||||
|
||||
function destroy(): void {
|
||||
clearPolling();
|
||||
}
|
||||
|
||||
return {
|
||||
get running() {
|
||||
return running;
|
||||
},
|
||||
get progressMessage() {
|
||||
return progressMessage;
|
||||
},
|
||||
get errorMessage() {
|
||||
return errorMessage;
|
||||
},
|
||||
get skippedPages() {
|
||||
return skippedPages;
|
||||
},
|
||||
triggerOcr,
|
||||
checkStatus,
|
||||
destroy
|
||||
};
|
||||
}
|
||||
Reference in New Issue
Block a user