91 lines
2.5 KiB
Swift
91 lines
2.5 KiB
Swift
import Foundation
|
|
import NIOCore
|
|
|
|
/**
|
|
Encapsulates a response from a device.
|
|
*/
|
|
struct DeviceResponse {
|
|
|
|
/// Shorthand property for a timeout event.
|
|
static var deviceTimedOut: DeviceResponse {
|
|
.init(event: .deviceTimedOut)
|
|
}
|
|
|
|
/// Shorthand property for a disconnected event.
|
|
static var deviceNotConnected: DeviceResponse {
|
|
.init(event: .deviceNotConnected)
|
|
}
|
|
|
|
/// Shorthand property for a connected event.
|
|
static var deviceConnected: DeviceResponse {
|
|
.init(event: .deviceConnected)
|
|
}
|
|
|
|
/// Shorthand property for an unexpected socket event.
|
|
static var unexpectedSocketEvent: DeviceResponse {
|
|
.init(event: .unexpectedSocketEvent)
|
|
}
|
|
|
|
/// Shorthand property for an invalid message.
|
|
static var invalidMessageSize: DeviceResponse {
|
|
.init(event: .invalidMessageSize)
|
|
}
|
|
|
|
/// Shorthand property for missing body data.
|
|
static var noBodyData: DeviceResponse {
|
|
.init(event: .noBodyData)
|
|
}
|
|
|
|
/// Shorthand property for a busy connection
|
|
static var operationInProgress: DeviceResponse {
|
|
.init(event: .operationInProgress)
|
|
}
|
|
|
|
/// The response to a key from the server
|
|
let event: MessageResult
|
|
|
|
/// The index of the next key to use
|
|
let response: Message?
|
|
|
|
/**
|
|
Decode a message from a buffer.
|
|
|
|
The buffer must contain `Message.length+1` bytes. The first byte denotes the event type,
|
|
the remaining bytes contain the message.
|
|
- Parameter buffer: The buffer where the message bytes are stored
|
|
*/
|
|
init?(_ buffer: ByteBuffer) {
|
|
guard let byte = buffer.getBytes(at: 0, length: 1) else {
|
|
print("No bytes received from device")
|
|
return nil
|
|
}
|
|
guard let event = MessageResult(rawValue: byte[0]) else {
|
|
print("Unknown response \(byte[0]) received from device")
|
|
return nil
|
|
}
|
|
self.event = event
|
|
guard let data = buffer.getSlice(at: 1, length: Message.length) else {
|
|
self.response = nil
|
|
return
|
|
}
|
|
self.response = Message(decodeFrom: data)
|
|
}
|
|
|
|
/**
|
|
Create a response from an event without a message from the device.
|
|
- Parameter event: The response from the device.
|
|
*/
|
|
init(event: MessageResult) {
|
|
self.event = event
|
|
self.response = nil
|
|
}
|
|
|
|
/// Get the reponse encoded in bytes.
|
|
var encoded: Data {
|
|
guard let message = response else {
|
|
return event.encoded
|
|
}
|
|
return event.encoded + message.encoded
|
|
}
|
|
}
|