Skip to main content

Frontend Implementation Summary - Phase 1

Status: ✅ COMPLETE Date: October 15, 2025

Files Modified​

✅ Created Files​

  1. dwd-frontend-react/src/services/optionsService.js - NEW
    • Full CRUD API integration for Options
    • Functions: getOptions, getOption, getDefaultOptions, createOption, updateOption, deleteOption
    • Error handling included

✅ Modified Files​

  1. dwd-frontend-react/src/components/scenarios/ScenarioEditDialog.jsx

    • REMOVED: Entire "Demand Model Section" (lines 178-229)
      • DemandModel dropdown
      • MinimumPressure field
      • PressureExponent field
      • RequiredPressure field
    • ADDED: New "EPANET Options Section"
      • Options preset dropdown with "Use Default" option
      • Options preview panel showing:
        • Selected preset name and description
        • Demand model (DDA/PDA)
        • Units and headloss formula
        • PDA parameters (if PDA selected)
    • ADDED: New props: optionsPresets, selectedOption
    • ADDED: Imports: Paper, Chip from MUI

  2. dwd-frontend-react/src/pages/ScenariosList.jsx

    • REMOVED from formData state:
      • demandModel (was: 0)
      • minimumPressure (was: 0)
      • pressureExponent (was: 0)
      • requiredPressure (was: 0)
    • ADDED to formData state:
      • optionsId (null = use default)
    • ADDED new state variables:
      • optionsPresets - Array of available option presets
      • selectedOption - Currently selected option for preview
    • ADDED useEffect hook to load options on mount
    • UPDATED handleInputChange to handle optionsId selection and preview
    • UPDATED handleOpenDialog to populate optionsId from scenario
    • UPDATED handleEditFromDetails to populate optionsId
    • UPDATED handleCloseDialog to reset optionsId
    • ADDED props to ScenarioEditDialog: optionsPresets, selectedOption
    • ADDED import: { getOptions } from optionsService

  3. dwd-frontend-react/src/components/scenarios/ScenarioDetailsDialog.jsx

    • REMOVED: Old "Demand Model Section" with direct fields
    • ADDED: New "EPANET Options Section"
      • Shows optionsName or "Default (inherited)"
      • Displays "Using Default" chip if no optionsId
      • Shows options configuration in a Paper component
      • Displays demand model type
      • Shows PDA parameters in grid layout (if PDA)
    • ADDED imports: Paper, Chip from MUI

Key Changes Summary​

Data Flow Change​

BEFORE:

Scenario Form → formData.demandModel (0 or 1)
             → formData.minimumPressure
             → formData.pressureExponent
             → formData.requiredPressure
             → POST/PUT /api/scenario

AFTER:

Load Options Presets → optionsPresets[]
User Selects Option → formData.optionsId
Preview Updates → selectedOption object
Submit → POST/PUT /api/scenario { optionsId: X }
Backend resolves → scenario.Options (embedded in response)

Form State Changes​

Removed from formData:

  • demandModel: 0
  • minimumPressure: 0
  • pressureExponent: 0
  • requiredPressure: 0

Added to formData:

  • optionsId: null (null means use default options)

New component state:

  • optionsPresets: [] - Loaded from API
  • selectedOption: null - For preview display

API Integration​

New service: optionsService.js

  • Integrates with /api/options endpoints
  • Handles all CRUD operations
  • Error handling with detailed messages

Updated scenario payloads:

  • Now send optionsId instead of PDA fields
  • Backend resolves options and returns embedded data

Validation Changes​

Client-Side (Removed)​

  • ❌ No longer validates PDA fields on frontend
  • ❌ No longer shows/hides PDA fields based on dropdown

Server-Side (Existing)​

  • ✅ Backend validates PDA fields in ValidatePdaFieldsAsync
  • ✅ Checks if options exist
  • ✅ Validates PDA parameters if demand model is PDA

User Experience Improvements​

  1. Simpler Forms - Just select a preset instead of configuring multiple fields
  2. Preview - See what options you're selecting before submitting
  3. Visual Feedback - Chips show "Default" and "Using Default" status
  4. Consistency - Reuse same options across multiple scenarios
  5. Error Prevention - Can't submit invalid option configurations

Testing Checklist​

Manual Testing Steps​

  1. Load Scenarios Page

    • Page loads without errors
    • Options presets load in background

  2. Create New Scenario

    • Click "Create New Scenario"
    • Options dropdown shows available presets
    • "Use Default Options" is available
    • Selecting an option shows preview
    • Preview shows demand model correctly
    • Preview shows PDA parameters if PDA
    • Submit sends optionsId (check network tab)
    • Scenario creates successfully

  3. Edit Existing Scenario

    • Click edit on scenario
    • Options dropdown shows current selection
    • Can change to different options preset
    • Preview updates when selection changes
    • Submit saves new optionsId

  4. View Scenario Details

    • Options preset name displays
    • Shows "Using Default" chip if no optionsId
    • Options details panel shows demand model
    • Shows PDA parameters if applicable
    • No errors in console

Browser Console Checks​

  • No React errors
  • No API 404s
  • No undefined property errors
  • Options load successfully

Network Tab Checks​

  • GET /api/options returns array
  • GET /api/options/default returns single object
  • POST /api/scenario payload includes optionsId (not PDA fields)
  • PUT /api/scenario payload includes optionsId (not PDA fields)
  • Response includes optionsId, optionsName, and embedded data

Rollback Plan (If Needed)​

If issues are found, revert these commits in this order:

  1. Revert frontend changes (ScenariosList, dialogs, service)
  2. Revert DTO changes
  3. Revert controller changes
  4. Revert model changes
  5. Rollback database migration

Git reset to commit before this refactoring started.

Known Limitations​

  1. No Options Management UI - Options must be managed via API or database directly

    • Can add OptionsList.jsx and OptionsForm.jsx later
    • Not critical for MVP functionality

  2. No "Create New Options" inline button - Deferred for later

    • Users can select from existing presets
    • New presets created via API

  3. No validation messages on frontend - Relies on backend validation

    • Could add client-side validation later
    • Current approach is simpler

Success Criteria ✅​

  • Forms no longer have direct PDA fields
  • Forms use Options dropdown
  • Preview shows selected options
  • Form state uses optionsId
  • API payloads send optionsId
  • Details view shows options preset name
  • No linter errors
  • No console errors (to be verified)

Next Actions​

  1. User generates migration - dotnet ef migrations add RefactorOptionsModel
  2. User applies migration - dotnet ef database update
  3. User tests backend - Verify API endpoints
  4. User tests frontend - Verify forms work correctly
  5. Deploy together - Backend + Frontend simultaneous deployment

Implementation Complete: October 15, 2025 Ready for Testing: ✅ YES

Last updated on by Jake, Cursor