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feat: add 7 analytics chart query functions (Task 9.2)

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New query functions in src/data_processing/pathway_queries.py:
- get_drug_market_share: Level 3 drug nodes grouped by directory
- get_pathway_costs: Level 4+ pathway nodes with cost_pp_pa
- get_cost_waterfall: Directorate cost per patient from level 3 aggregation
- get_drug_transitions: Sankey source/target drug transitions with ordinal line labels
- get_dosing_intervals: Parsed average_spacing by trust/directory
- get_drug_directory_matrix: Directory x drug pivot with patient/cost metrics
- get_treatment_durations: Weighted avg_days by drug within directorates

Thin wrappers added in dash_app/data/queries.py for all 7 functions.
This commit is contained in:
Andrew Charlwood
2026-02-06 19:21:10 +00:00
parent b34a1138fc
commit d98cd4fd69
3 changed files with 558 additions and 3 deletions
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IMPLEMENTATION_PLAN.md
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@@ -359,7 +359,7 @@ Drawer selection → update_drug_selection → app-state store → load_pathway_
- **Checkpoint**: App starts, tab bar renders with all 8 tabs, icicle tab still works, other tabs show placeholder "Coming soon" messages ✓
### 9.2 Query functions for all chart types
- [ ] Add to `src/data_processing/pathway_queries.py`:
- [x] Add to `src/data_processing/pathway_queries.py`:
- `get_drug_market_share(db_path, date_filter_id, chart_type, directory=None, trust=None)` — Level 3 nodes grouped by directory, returning drug, value, colour
- `get_pathway_costs(db_path, date_filter_id, chart_type, directory=None)` — Level 4+ nodes with cost_pp_pa, parsed pathway labels, patient counts
- `get_cost_waterfall(db_path, date_filter_id, chart_type, trust=None)` — Level 2 nodes with cost_pp_pa per directorate/indication
@@ -367,8 +367,8 @@ Drawer selection → update_drug_selection → app-state store → load_pathway_
- `get_dosing_intervals(db_path, date_filter_id, chart_type, drug=None)` — Level 3 nodes for a specific drug, parsed average_spacing by trust/directory
- `get_drug_directory_matrix(db_path, date_filter_id, chart_type)` — Level 3 nodes pivoted as directory × drug with value/cost metrics
- `get_treatment_durations(db_path, date_filter_id, chart_type, directory=None)` — Level 3 nodes with avg_days by drug within a directorate
- [ ] Add thin wrappers in `dash_app/data/queries.py` for each new function (resolve DB_PATH and delegate)
- **Checkpoint**: All 7 query functions return correct data via manual Python tests (`python -c "..."`)
- [x] Add thin wrappers in `dash_app/data/queries.py` for each new function (resolve DB_PATH and delegate)
- **Checkpoint**: All 7 query functions return correct data via manual Python tests (`python -c "..."`) ✓
### 9.3 First-Line Market Share chart (Tab 2)
- [ ] Create `dash_app/callbacks/market_share.py`: