Sankey Visualizer with interactive controls for use with OBJECTIVE static TEUI3 Energy and Carbon Building Economics Engine by OpenBuilding, a Canadian Nonprofit in the AEC Sector.

Value State Management:

There's a ValueState class that manages three states: default, imported, and user-edited Each global value (COP, MVHR, DWHR) has its own ValueState instance The class includes validation and normalization logic for values

Import Process Flow:

File handling is split between CSV and Excel paths in the FileHandler class Both paths attempt to update global values and node/link data The pendingImportData variable stores imported data until "Apply Changes" is clicked

Potential Issues:

a) State Synchronization:

Window globals (COPh, MVHR, etc.) and ValueState instances may get out of sync Reset functionality might not properly distinguish between default and imported states Some updates bypass the ValueState system and modify window globals directly

b) Import Application:

handleApplyChanges() preserves current globals before applying new data This preservation might override imported values unintentionally The order of operations between global updates and data updates isn't clearly defined

c) Reset Logic:

Reset attempts to restore imported state but might fall back to defaults inconsistently The distinction between "no imports made" and "imports exist" isn't clearly tracked

Critical Flow Points:

Initial data loading File import Apply changes Reset User edits Mode switching (gas/heat pump)