FFL-1460 Update Flags SDK to evaluate feature flags synchronously

[yugisu-flux]

What does this PR do?

This PR updates the Flags SDK to evaluate feature flags synchronously. This is implemented by fetching all flags at the FlagsClient init stage (in the setEvaluationContext method)

• Implement flag state sync on FlagsClient init
• Add calls for tracking exposures & logging RUM events to sync methods
• Remove async get*Details methods

Motivation

https://datadoghq.atlassian.net/browse/FFL-1460

Additional Notes

This PR is pending on PRs from iOS and Android SDK repositories:

• iOS PR: FFL-1460 FlagsClient changes to accommodate Flags RN SDK sync flag evals  dd-sdk-ios#2604
• Android PR: FFL-1460 FlagsClient changes to accommodate Flags RN SDK sync flag evals dd-sdk-android#3049

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)
• If this PR is auto-generated, please make sure also to manually update the code related to the change

[datadog-datadog-prod-us1]

⚠️ Tests

✨ Fix all issues with Cursor

⚠️ Warnings

🧪 4 Tests failed

    FlagsClient getBooleanDetails should fetch the boolean details from native side from packages/core/src/flags/__tests__/FlagsClient.test.ts (Fix with Cursor)

    FlagsClient getNumberDetails should fetch the number details from native side from packages/core/src/flags/__tests__/FlagsClient.test.ts (Fix with Cursor)

FlagsClient getObjectDetails should fetch the object details from native side from packages/core/src/flags/__tests__/FlagsClient.test.ts (Datadog) (Fix with Cursor)

Cannot read properties of undefined (reading 'test-object-flag')

    FlagsClient getStringDetails should fetch the string details from native side from packages/core/src/flags/__tests__/FlagsClient.test.ts (Fix with Cursor)

View all

ℹ️ Info

❄️ No new flaky tests detected

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