added-env-based-history-window#660
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Dec 31, 2025
…efix#655) - Add environment variables for history start mode (rolling/fixed) and offset hours - Update nowcasting-app with configurable getEarliestForecastTimestamp() - Update quartz-app queries with start_datetime_utc parameter - Add comprehensive test suites for both apps - Update .env.example files with configuration documentation - Maintain backward compatibility (defaults to 48 hours rolling) Supersedes openclimatefix#657, openclimatefix#659, openclimatefix#660
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Pull Request
Description
This PR introduces a configurable history window for the Quartz Frontend via environment variables.
It allows developers to control how far back in time the UI fetches solar forecast and actual data — without changing code manually.
Previously, the application used a fixed time window (e.g., 48 hours).
Now, this can be configured using environment variables such as:
NEXT_PUBLIC_HISTORY_WINDOW_TYPE=fixed|rolling
NEXT_PUBLIC_HISTORY_WINDOW_HOURS=48|72
Fixes #655 — Set start of window for UI for all forecast/actuals
How Has This Been Tested?
Ran the application locally using different environment variable settings:
NEXT_PUBLIC_HISTORY_WINDOW_TYPE=fixed
NEXT_PUBLIC_HISTORY_WINDOW_TYPE=rolling
Verified that the API requests (to
/v0/solar/GB/gsp/pvlive/alland/v0/solar/GB/national/forecast) reflected correctstart_datetime_utcandend_datetime_utcparameters.Confirmed that the charts updated accordingly for both 48-hour and 72-hour modes.
Ran
yarn lintandyarn testsuccessfully after correcting formatting issues.Checklist