feat: Begins air handler measurement form

Sources/StaticPressureFeature/AirHandlerMeasurementForm.swift

@@ -0,0 +1,116 @@
+import ComposableArchitecture
+import DependenciesAdditions
+import EstimatedPressureDependency
+import SharedModels
+import SwiftUI
+import TCAExtras
+
+@Reducer
+public struct AirHandlerMeasurementForm {
+  
+  @ObservableState
+  public struct State: Equatable {
+    public var calculatedMeasurement: EquipmentMeasurement.AirHandler?
+    public var focusedField: Field?
+    public var measurement: EquipmentMeasurement.AirHandler
+    public var updatedAirflow: Double?
+    
+    public init(
+      calculatedMeasurement: EquipmentMeasurement.AirHandler? = nil,
+      focusedField: Field? = nil,
+      measurement: EquipmentMeasurement.AirHandler = .init(),
+      updatedAirflow: Double? = nil
+    ) {
+      self.calculatedMeasurement = calculatedMeasurement
+      self.focusedField = focusedField
+      self.measurement = measurement
+      self.updatedAirflow = updatedAirflow
+    }
+    
+    public var isValid: Bool {
+      return measurement.returnPlenumPressure != nil
+      && measurement.postFilterPressure != nil
+      && measurement.postCoilPressure != nil
+      && measurement.supplyPlenumPressure != nil
+      && measurement.airflow != nil
+      && updatedAirflow != nil
+    }
+    
+    public enum Field: String, Equatable, CaseIterable, FocusableField {
+      case returnPlenumPressure
+      case postFilterPressure
+      case postCoilPressure
+      case supplyPlenumPressure
+      case airflow
+    }
+  }
+  
+  public enum Action: BindableAction, ViewAction {
+    case binding(BindingAction<State>)
+    case receive(TaskResult<EquipmentMeasurement.AirHandler?>)
+    case view(View)
+   
+    @CasePathable
+    public enum View {
+      case submitField
+    }
+  }
+  
+  @Dependency(\.estimatedPressuresClient) var estimatedPressuresClient
+  @Dependency(\.logger["\(Self.self)"]) var logger
+  
+  public var body: some Reducer<State, Action> {
+    BindingReducer()
+    Reduce<State, Action> { state, action in
+      switch action {
+      case .binding:
+        return .none
+        
+      case let .receive(.success(calculatedMeasurement)):
+        state.calculatedMeasurement = calculatedMeasurement
+        return .none
+        
+      case .receive:
+        return .none
+        
+      case let .view(action):
+        switch action {
+          
+        case .submitField:
+          state.focusedField = state.focusedField?.next
+          guard state.isValid else { return .none }
+          return calculateEstimates(state: state)
+          
+        }
+      }
+    }
+    .onFailure(case: \.receive, .log(logger: logger))
+  }
+  
+  private func calculateEstimates(state: State) -> Effect<Action> {
+    .receive(action: \.receive) {
+      let result = try await estimatedPressuresClient.estimatedPressure(
+        for: .airHandler(state.measurement),
+        at: state.updatedAirflow ?? 0
+      )
+      
+      guard case let .airHandler(airHandler) = result else {
+        return .none
+      }
+      return airHandler
+    }
+//    return .receive(action: \.recieve) {
+//      try await estimatedPressuresClient.estimatedM
+//    }
+  }
+}
+
+public struct EquipmentMeasurementFormView: View {
+  public var body: some View {
+    Text(/*@START_MENU_TOKEN@*/"Hello, World!"/*@END_MENU_TOKEN@*/)
+  }
+}
+
+#Preview {
+  EquipmentMeasurementFormView()
+}

Sources/StaticPressureFeature/FocusableField.swift

@@ -0,0 +1,21 @@
+import Foundation
+
+public protocol FocusableField {
+  var next: Self? { get }
+}
+
+extension FocusableField where Self: CaseIterable, Self: Equatable {
+  
+  public var next: Self? {
+    
+    guard let index = Self.allCases.firstIndex(of: self)
+    else { return nil }
+    
+    let endIndex = Self.allCases.endIndex
+    let nextIndex = Self.allCases.index(after: index)
+    
+    guard nextIndex < endIndex else { return nil }
+    return Self.allCases[nextIndex]
+    
+  }
+}

Sources/StaticPressureFeature/StaticPressureView.swift

@@ -1 +1,4 @@
-import Foundation
+import ComposableArchitecture
+import SharedModels
+import SwiftUI
+import TCAExtras