Return 400 for malformed work history JSON

[rissrice2105-agent]

Fixes #455.

Summary

• Return 400 for malformed JSON sent to POST /api/work-history
• Prevent invalid request bodies from reaching work history validation or inserts
• Add regression coverage for malformed JSON

Verification

• vitest run src/app/api/work-history/route.test.ts
• tsc --noEmit

[greptile-apps]

Greptile Summary

Adds a try/catch around request.json() in POST /api/work-history so malformed request bodies are rejected with a 400 before reaching schema validation or any database call, and adds a matching regression test.

• route.ts: wraps request.json() in an inner try/catch that returns { error: "Invalid JSON body" } with status 400 on failure; the rest of the handler (auth, validation, DB insert) is unchanged.
• route.test.ts: new test mocks auth context, passes a fake request whose json() rejects with SyntaxError, and asserts status 400, the correct error message, and that the Supabase from method is never invoked.

Confidence Score: 4/5

Safe to merge; the change is minimal and well-targeted, with a regression test covering the fixed path.

The change correctly stops malformed JSON from reaching validation and the database. The bare catch treats any error from request.json() as a client 400, which could mask infrastructure failures that should surface as 500 — unlikely in practice but worth narrowing.

The inner catch in route.ts lines 43-47 is the only spot worth a second look.

Important Files Changed

Filename	Overview
src/app/api/work-history/route.ts	Adds an inner try/catch around request.json() to return 400 for malformed JSON before validation or DB access; catch is broad (catches all errors, not just SyntaxError).
src/app/api/work-history/route.test.ts	New regression test for malformed JSON — mocks auth context, passes a request whose json() rejects with SyntaxError, and asserts 400 status, correct error message, and no DB calls.

Sequence Diagram

sequenceDiagram
    participant Client
    participant POST as POST /api/work-history
    participant Auth as getAuthContext
    participant DB as Supabase

    Client->>POST: POST with malformed JSON
    POST->>Auth: getAuthContext(request)
    Auth-->>POST: "{ user, supabase }"
    POST->>POST: request.json() throws SyntaxError
    POST-->>Client: "400 { error: Invalid JSON body }"

    Client->>POST: POST with valid JSON
    POST->>Auth: getAuthContext(request)
    Auth-->>POST: "{ user, supabase }"
    POST->>POST: request.json() returns body
    POST->>POST: workHistorySchema.safeParse(body)
    POST->>DB: insert work_history
    DB-->>POST: "{ data, error }"
    POST-->>Client: "201 { work_history }"

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_{Reviews (1): Last reviewed commit: "Handle malformed work history JSON" | Re-trigger Greptile}

[greptile-apps]

Bare catch swallows all json() errors as 400

The inner catch catches every possible error from request.json(), not just SyntaxError. In normal operation this is fine, but if the body stream has already been consumed or there's some other infrastructure-level failure, the endpoint will silently return 400 instead of letting the outer catch promote it to 500. Narrowing the catch to SyntaxError is the standard pattern and keeps 500-class failures from being misclassified.

Suggested change

	try {
	body = await request.json();
	} catch {
	return NextResponse.json({ error: "Invalid JSON body" }, { status: 400 });
	}
	try {
	body = await request.json();
	} catch (err) {
	if (!(err instanceof SyntaxError)) throw err;
	return NextResponse.json({ error: "Invalid JSON body" }, { status: 400 });
	}

[rissrice2105-agent]

CI is green for PR #456.

Verification:

• vitest run src/app/api/work-history/route.test.ts
• tsc --noEmit

uGig invoice evidence will be sent after the duplicate-invoice retry window for the same gig/application has elapsed.

[rissrice2105-agent]

Invoice evidence has now been sent for PR #456.

CI is green and local verification was:

• vitest run src/app/api/work-history/route.test.ts
• tsc --noEmit