Add support to fail flow on consent denial

[ThaminduDilshan]

Purpose

This pull request introduces a new "fail on deny" capability for consent nodes, allowing flows to be configured to fail if a user denies a consent prompt—even if all requested attributes and permissions are optional. The change includes backend logic, frontend UI updates, internationalization, and comprehensive tests.

Approach

Backend: Consent Denial Handling

• Added the failOnDeny property (propertyKeyConsentFailOnDeny) to consent executor configuration, enabling strict flow failure when users deny consent or when the consent prompt times out.

Frontend: UI and Internationalization

• Updated the consent properties panel (ConsentProperties.tsx) to include a checkbox for "Fail flow when user denies consent," with state management and change handling.
• Added English translations and test mocks for the new property label and hint.

Related Issues

• [IMPROVEMENT] Consent Screen: Deny button fails to redirect to Relying Party with 'Consent Request Rejected' error #4343
• [IMPROVEMENT] Consent Screen: Flow timer expiration fails to redirect to Relying Party with error code #4345

Related PRs

• N/A

Checklist

• Followed the contribution guidelines.
• Manual test round performed and verified.
• Documentation provided. (Add links if there are any)
  • Ran Vale and fixed all errors and warnings
• Tests provided. (Add links if there are any)
  • Unit Tests
  • Integration Tests
• Breaking changes. (Fill if applicable)
  • Breaking changes section filled.
  • breaking change label added.

Security checks

• Followed secure coding standards in WSO2 Secure Coding Guidelines
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets.

Summary by CodeRabbit

• New Features

  • Added a Fail on denial option for consent steps.
  • When enabled, explicit consent denials and timeouts fail the flow.
  • Optional consent items can still be declined without failing the flow.
  • Added a checkbox and explanatory hint in the consent step settings.

• Bug Fixes

  • Preserved existing behavior when the option is disabled.
  • Essential-item denials continue to fail as expected.

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📝 Walkthrough

Walkthrough

The consent executor now supports failOnDeny. Configured denials and timeouts fail the flow, while optional-element denials remain successful. The console adds a checkbox, translations, and tests for this property.

Changes

Consent failOnDeny

Layer / File(s)	Summary
Consent failure contract and execution backend/internal/flow/executor/constants.go, backend/internal/flow/executor/consent_executor.go	The executor exposes failOnDeny. Enabled nodes fail on timeout or explicit denial after consent recording. Optional-element denials remain successful.
Consent behavior validation backend/internal/flow/executor/consent_executor_test.go	Tests cover enabled and disabled behavior, optional and essential denials, consent recording, and timeout handling.
Console consent property configuration frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/execution-properties/ConsentProperties.tsx, frontend/packages/i18n/src/locales/en-US.ts, frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/__tests__/ExecutionExtendedProperties.test.tsx	The console adds a translated failOnDeny checkbox and tests its default, persisted, and change states.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🟡 Moderate · up to b6c9e

The PR adds a setting that fails flows on both consent denial and timeout, but the documentation and configuration hint do not fully explain the timeout behavior. This could lead administrators to configure flows with incorrect expectations, so the changes should be documented and clarified before merging.

Sequence Diagram(s)

sequenceDiagram
  participant FlowBuilder
  participant ConsentExecutor
  participant ConsentRecord
  FlowBuilder->>ConsentExecutor: Configure failOnDeny
  ConsentExecutor->>ConsentRecord: Record consent decision
  ConsentRecord-->>ConsentExecutor: Recording result
  ConsentExecutor-->>FlowBuilder: Complete or return consent denial/timeout failure

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Possibly related PRs

• thunder-id/thunderid#4653: Introduced the consent executor behavior extended by this change.
• thunder-id/thunderid#4862: Added related consent executor integration coverage.
• thunder-id/thunderid#4924: Covers related consent grants, denials, optional elements, and timeouts.

Suggested reviewers: donomalvindula, thiva-k

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding support for failing flows after consent denial.
Description check	✅ Passed	The description includes the required sections and explains the backend, frontend, internationalization, and test changes.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[ThaminduDilshan]

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Actionable comments posted: 2

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Inline comments:
In `@backend/internal/flow/executor/consent_executor.go`:
- Line 66: Update the consent-flow documentation to cover the failOnDeny
executor property: document its default behavior, configuration, failures caused
by explicit denial, and failures caused by timeout. Create the consent-flows
guide if it does not already exist.

In `@backend/internal/flow/executor/constants.go`:
- Around line 115-118: Update the failOnDeny documentation and related helper
text to state that enabled consent nodes fail the flow on both explicit user
denial and prompt timeout. In
backend/internal/flow/executor/constants.go:115-118 revise the
propertyKeyConsentFailOnDeny comment; in
frontend/packages/i18n/src/locales/en-US.ts:3594-3596 add the timeout
consequence; and in
frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/__tests__/ExecutionExtendedProperties.test.tsx:51-53
update the mocked helper text to match the production translation.

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📥 Commits

Reviewing files that changed from the base of the PR and between 16df251 and b6c9eb0.

📒 Files selected for processing (6)

• backend/internal/flow/executor/consent_executor.go
• backend/internal/flow/executor/consent_executor_test.go
• backend/internal/flow/executor/constants.go
• frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/__tests__/ExecutionExtendedProperties.test.tsx
• frontend/apps/console/src/features/flows/components/resource-property-panel/extended-properties/execution-properties/ConsentProperties.tsx
• frontend/packages/i18n/src/locales/en-US.ts

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✅ All modified and coverable lines are covered by tests.

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[thiva-k]

Shall we update the consent docs too?