Merge pull request #92 from nodes-vapor/feature/add-tag-context-helper

Feature/add tag context helper

README.md

@@ -10,10 +10,26 @@
 
 ## 📦 Installation
 
-Update your `Package.swift` file.
+Add `Sugar` to the package dependencies (in your `Package.swift` file):
 
 ```swift
-.package(url: "https://github.com/nodes-vapor/sugar.git", from: "4.0.0")
+dependencies: [
+    ...,
+    .package(url: "https://github.com/nodes-vapor/sugar.git", from: "4.0.0-beta")
+]
+```
+
+as well as to your target (e.g. "App"):
+
+```swift
+targets: [
+    ...
+    .target(
+        name: "App",
+        dependencies: [... "Sugar" ...]
+    ),
+    ...
+]
 ```
 
 ## Getting started 🚀

Sources/Sugar/Authentication/JWTAuthenticationMiddleware.swift

@@ -41,9 +41,7 @@ public final class JWTAuthenticationMiddleware<A: JWTAuthenticatable>: Middlewar
         do {
             jwt = try JWT<A.JWTPayload>(from: bearer.token, verifiedUsing: signer)
         } catch let error as JWTError where error.identifier == "exp" {
-            return try Future
-                .transform(to: HTTPResponse(status: .unauthorized), on: req)
-                .encode(for: req)
+            return try req.future(HTTPResponse(status: .unauthorized)).encode(for: req)
         }
 
         guard shouldAuthenticate else {

Sources/Sugar/Helpers/Future.swift

@@ -19,10 +19,6 @@ public extension Future {
             try callback(expectation).map { _ in expectation }
         }
     }
-
-    static func transform(to value: T, on worker: Worker) -> Future<T> {
-        return Future.map(on: worker) { value }
-    }
 }
 
 public extension Future where Expectation: OptionalType {

Sources/Sugar/Helpers/TagContext.swift

@@ -0,0 +1,10 @@
+import TemplateKit
+
+extension TagContext {
+    /// Throws an error if the parameter count is larger than the supplied number `n`.
+    public func requireParameterCount(upTo n: Int) throws {
+        guard parameters.count <= n else {
+            throw error(reason: "Invalid parameter count: \(parameters.count)/\(n)")
+        }
+    }
+}