GSoC 2026 – Week 5 (June 30 - July 6th) : Completing the As-Of Frontend

Weekly Report (June 30th - July 6th)

Project: Time-Travel Data Access and Versioning UI for istSOS Web Administration
Organization: OSGeo / istSOS4
Contributor: Bhudev Bhanpuriya
Mentors: Massimiliano Cannata, Daniele Strigaro, Claudio Primerano

I performed the following tasks during this week:

  • Implemented an adapter pattern to seamlessly switch between mock data and backend APIs using a single environment flag, allowing frontend development to continue independently of backend readiness.

  • Added existence validation for snapshot mode, handling cases where the selected timestamp falls before a Thing’s creation or after its deletion, along with recovery actions to navigate to the nearest valid snapshot.

  • Refined and finalized the remaining frontend implementation of the As-Of workflow.

  • Shared the completed frontend implementation with mentors for review and documented several questions regarding the expected behavior of the Observation Graph in snapshot mode before proceeding with its implementation.

    Implementation Screenshots: https://docs.google.com/presentation/d/1yX3SLo7uDqsQRV5jIn2wkX3pT7d0S37ETz6VW2f_oSM/edit?usp=sharing\

What do I plan to do next week?

  • Complete the Observation Graph integration for As-Of mode based on mentor feedback.

  • Prepare and submit the complete As-Of implementation as a pull request.

  • Begin the frontend implementation of the approved from_to workflow.

Am I blocked on anything?

  • Waiting for clarification on the expected behavior of the Observation Graph in As-Of mode before completing the remaining implementation.

--
Regards,

Bhudev Bhanpuriya

Detailed implementation of whats is done this week and activity can be found here - GSoC'26 : As-Of Frontend Implementation Complete - Questions Before PR · istSOS/istSOS4-gui · Discussion #36 · GitHub