- Remove redundant local imports from BigNumberChartPlugin.post_map_validate()
now that BigNumberChartConfig and is_column_truly_temporal are at top level
- Add explanatory comments on the two remaining local get_registry imports in
chart_utils.py and dataset_validator.py (circular import prevention)
- Fix schema_validator.py and generate_chart.py docstring: XY 'x' field is
optional (defaults to dataset primary datetime column), not required
- Propagate cardinality suggestions alongside warnings in XYChartPlugin
- Clarify app.py instructions: chart_type_display_name is null for viz_types
outside the 7 generate_chart-supported types
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
On top of the dead-code elimination in the previous commit:
- Add lazy _ensure_plugins_loaded() bootstrap to ChartTypeRegistry so the
registry is populated even without importing app.py (fixes isolated test runs)
- Delegate _RegistryProxy methods to module-level functions so bootstrap runs
- Guard register() against empty chart_type strings
- Add generate_name + resolve_viz_type to ChartTypePlugin Protocol and
BaseChartPlugin; delegate generate_chart_name/_resolve_viz_type in
chart_utils to the plugin registry
- Add _with_context static helper to BaseChartPlugin (shared by all plugins)
- Fix stale 'five methods' → 'eight methods' docstring in plugin.py
- Add TypeVar _C to normalize_column_names so mypy infers correct return type
- Fix broken tests: update _pre_validate_big_number_config → _pre_validate_chart_type,
remove deleted TestNormalizeXYConfig/TestNormalizeTableConfig classes,
update runtime validator tests for removed _validate_format_compatibility /
_validate_cardinality methods, add x is not None narrowing guards
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
H1: Delete 7 dead _pre_validate_* static methods from SchemaValidator
— exact duplicates of plugin pre_validate() methods, never called
after _pre_validate_chart_type() was updated to delegate to plugin.
H2: Inline DatasetValidator._normalize_xy_config/_normalize_table_config
into XYChartPlugin/TableChartPlugin.normalize_column_refs() and delete
both DatasetValidator helper methods. The 5 other plugins already
called _get_canonical_column_name directly; XY and Table now match.
H3: Add generate_name()/resolve_viz_type() to ChartTypePlugin protocol
and BaseChartPlugin, implement in all 7 plugins. Replace the 7-arm
isinstance chain in generate_chart_name() and the 7-arm elif chain
in _resolve_viz_type() with single-line registry dispatch.
H4: Add a sync comment above _CHART_TYPE_ERROR_HINTS to document that
it must stay in sync with the plugin registry.
M4: Move logger=logging.getLogger(__name__) from inside
XYChartPlugin.get_runtime_warnings() to module scope.
Replaces four scattered dispatch locations (schema_validator, dataset_validator,
chart_utils, runtime validator) with a central ChartTypePlugin registry. Each of
the 7 supported chart types (xy, table, pie, pivot_table, mixed_timeseries,
handlebars, big_number) now owns its pre-validation, column extraction, form_data
mapping, post-map validation, column normalization, and runtime warnings in a
single plugin class.
Key changes:
- Add ChartTypePlugin protocol and BaseChartPlugin base class (plugin.py)
- Add ChartTypeRegistry with register/get/all_types helpers (registry.py)
- Add 7 chart type plugins under chart/plugins/ with full coverage
- Fix 5-type column validation gap: pie, pivot_table, mixed_timeseries, handlebars,
and big_number now participate in dataset column validation (previously silently skipped)
- Move BigNumber trendline temporal check to BigNumberChartPlugin.post_map_validate()
- Add get_runtime_warnings() to plugin protocol; XYChartPlugin implements
format/cardinality checks, removing isinstance(config, XYChartConfig) from RuntimeValidator
- Fix stale generate_chart.py docstring listing only 'xy' and 'table' chart types
- Add missing pie, pivot_table, mixed_timeseries handlers to _enhance_validation_error;
refactor into a data-driven lookup table to stay within complexity limits
- Fix empty details fallback in Pydantic error handler
