80 lines
1.9 KiB
Swift
80 lines
1.9 KiB
Swift
import CoreFoundation
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import Models
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extension SizingLimits.Request {
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func respond() async throws -> SizingLimits.Response {
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return try .init(
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oversizing: .oversizingLimit(systemType: systemType, houseLoad: houseLoad),
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undersizing: .undersizingLimits
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)
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}
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}
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private extension SizingLimits.Limits {
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static let undersizingLimits = Self(
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heating: 90,
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coolingTotal: 90,
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coolingSensible: 90,
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coolingLatent: 90
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)
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static func oversizingLimit(
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systemType: SystemType,
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houseLoad: HouseLoad?
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) throws -> Self {
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switch systemType {
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case let .heatingOnly(type: type):
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return .init(heating: type.oversizingLimit(), coolingTotal: 115)
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case let .airToAir(type: _, compressor: compressor, climate: climate):
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return try .init(
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heating: 140,
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coolingTotal: coolingTotalOversizingLimit(
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houseLoad: houseLoad,
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compressorType: compressor,
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climateType: climate
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),
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coolingSensible: nil,
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coolingLatent: 150
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)
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}
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}
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}
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private extension SystemType.HeatingOnlyType {
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func oversizingLimit() -> Int {
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switch self {
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case .boiler, .furnace: return 140
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case .electric: return 175
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}
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}
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}
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private func coolingTotalOversizingLimit(
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houseLoad: HouseLoad?,
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compressorType: SystemType.CompressorType,
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climateType: SystemType.ClimateType
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) throws -> Int {
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switch (compressorType, climateType) {
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case (.singleSpeed, .mildWinterOrLatentLoad):
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return 115
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case (.multiSpeed, .mildWinterOrLatentLoad):
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return 120
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case (.variableSpeed, .mildWinterOrLatentLoad):
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return 130
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default:
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guard let houseLoad else {
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throw HouseLoadError()
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}
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let decimal = Double(houseLoad.coolingTotal + 15000) / Double(houseLoad.coolingTotal)
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return Int(round(decimal * 100))
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}
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}
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public struct HouseLoadError: Error, Equatable {
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public let message = "House load not supplied."
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public init() {}
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}
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