58 lines
1.4 KiB
Swift
58 lines
1.4 KiB
Swift
/// Holds onto values returned when calculating the design
|
|
/// friction rate for a project.
|
|
public struct FrictionRate: Codable, Equatable, Sendable {
|
|
public let availableStaticPressure: Double
|
|
public let value: Double
|
|
public var hasErrors: Bool { error != nil }
|
|
|
|
public init(
|
|
availableStaticPressure: Double,
|
|
value: Double
|
|
) {
|
|
self.availableStaticPressure = availableStaticPressure
|
|
self.value = value
|
|
}
|
|
|
|
public var error: FrictionRateError? {
|
|
if value >= 0.18 {
|
|
return .init(
|
|
"Friction rate should be lower than 0.18",
|
|
resolutions: [
|
|
"Decrease the blower speed",
|
|
"Decrease the blower size",
|
|
"Increase the Total Equivalent Length",
|
|
]
|
|
)
|
|
} else if value <= 0.02 {
|
|
return .init(
|
|
"Friction rate should be higher than 0.02",
|
|
resolutions: [
|
|
"Increase the blower speed",
|
|
"Increase the blower size",
|
|
"Decrease the Total Equivalent Length",
|
|
]
|
|
)
|
|
}
|
|
return nil
|
|
}
|
|
}
|
|
|
|
public struct FrictionRateError: Error, Equatable, Sendable {
|
|
public let reason: String
|
|
public let resolutions: [String]
|
|
|
|
public init(
|
|
_ reason: String,
|
|
resolutions: [String]
|
|
) {
|
|
self.reason = reason
|
|
self.resolutions = resolutions
|
|
}
|
|
}
|
|
|
|
#if DEBUG
|
|
extension FrictionRate {
|
|
public static let mock = Self(availableStaticPressure: 0.21, value: 0.11)
|
|
}
|
|
#endif
|