The *FilterBar family (FilterBar / SessionFilterBar / PurchaseFilterBar /
DeviceFilterBar / PlatformFilterBar / PlayEventFilterBar) previously shared
the collapsible chrome through a free `_filter_bar(fields, ...)` helper that
each function called at the end. Replace that with a `_FilterBarBase`
BaseComponent: it owns the chrome render() and declares `media =
_FILTER_BAR_MEDIA`, and each bar is now a subclass implementing
`build_fields()`.
The per-entity field-building bodies move verbatim into module-level
`_<entity>_fields(existing, ...)` functions that each subclass delegates to,
so the large bodies are untouched (no reindentation) and the diff stays
reviewable. Media still bubbles: BaseComponent.collect_media() merges the
bar's own filter_bar.js with the search_select.js / range_slider.js /
date_range_picker.js declared by the contained widgets.
Call sites are unchanged — `FilterBar(filter_json=..., preset_list_url=...)`
now instantiates a Node instead of calling a function, and both `str(bar)`
and `collect_media(bar)` behave as before.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
lukas
1c5bff8651
