Make SubmissionsMiddleware ServiceType compliant to add middleware in config as the rest of vapor's available middleware (coding style more than a real improvement)

README.md

@@ -48,16 +48,24 @@ First make sure that you've imported Submissions everywhere it's needed:
 import Submissions
 ```
 
-### Adding the Provider
+### Adding the Provider and Middleware
 
 "Submissions" comes with a light-weight provider that we'll need to register in the `configure` function in our `configure.swift` file:
 
 ```swift
 try services.register(SubmissionsProvider())
 ```
 
+It also includes a middleware you have to register in your `MiddlewareConfig`  (needs to come after `ErrorMiddleware` if present, to avoid the `SubmissionValidationError`s from being transformed into Internal Server errors on the way back up the responder chain)
+
+```swift
+config.use(SubmissionsMiddleware.self)
+```
+
+
 This makes sure that fields and errors can be stored on the request using a `FieldCache` service.
 
+
 ## Validating API requests
 
 _TODO_

Sources/Submissions/SubmissionsMiddleware.swift

@@ -5,8 +5,13 @@ import Vapor
 /// Note: needs to come after `ErrorMiddleware` (if present) to avoid the
 /// `SubmissionValidationError`s from being transformed into Internal Server errors on the way back
 /// up the responder chain.
-public final class SubmissionsMiddleware: Middleware {
+public final class SubmissionsMiddleware: Middleware, ServiceType {
 
+    /// See `ServiceType`.
+	public static func makeService(for container: Container) throws -> SubmissionsMiddleware {
+		return SubmissionsMiddleware()
+	}
+
     /// Create a new `SubmissionsMiddleware`.
     public init() {}
 

Sources/Submissions/SubmissionsProvider.swift

@@ -8,6 +8,7 @@ public final class SubmissionsProvider: Provider {
 
     /// See `Provider`
     public func register(_ services: inout Services) throws {
+		services.register(SubmissionsMiddleware.self)
         services.register { _ in FieldCache() }
     }