Extract config

Sources/App/Config.swift

@@ -0,0 +1,13 @@
+import Foundation
+
+struct Config {
+
+    /// The port where the server runs
+    static let port = 6003
+
+    /// The name of the file in the `Resources` folder containing the device authentication token
+    static let keyFileName = "deviceKey"
+
+    /// The seconds to wait for a response from the device
+    static let deviceTimeout: Int64 = 20
+}

Sources/App/DeviceManager.swift

@@ -4,9 +4,6 @@ import Vapor
 
 final class DeviceManager {
 
-    /// The seconds to wait for a response from the device
-    static let deviceTimeout: Int64 = 20
-
     /// The connection to the device
     private var connection: WebSocket?
 
@@ -46,7 +43,7 @@ final class DeviceManager {
         }
         requestInProgress = eventLoop.makePromise(of: DeviceResponse.self)
         socket.send(message.bytes, promise: nil)
-        eventLoop.scheduleTask(in: .seconds(Self.deviceTimeout)) { [weak self] in
+        eventLoop.scheduleTask(in: .seconds(Config.deviceTimeout)) { [weak self] in
             guard let promise = self?.requestInProgress else {
                 return
             }

Sources/App/configure.swift

@@ -4,10 +4,10 @@ var deviceManager: DeviceManager!
 
 // configures your application
 public func configure(_ app: Application) throws {
-    app.http.server.configuration.port = 6003
+    app.http.server.configuration.port = Config.port
     
     let storageFolder = URL(fileURLWithPath: app.directory.resourcesDirectory)
-    let keyFile = storageFolder.appendingPathComponent("deviceKey")
+    let keyFile = storageFolder.appendingPathComponent(Config.keyFileName)
     let deviceKey = try String(contentsOf: keyFile)
         .trimmingCharacters(in: .whitespacesAndNewlines)
     deviceManager = DeviceManager(deviceKey: deviceKey)