Replace Runtime package with Mirror (#82)

Author: adam-fowler

.dockerignore

@@ -0,0 +1,2 @@
+.build
+.git

Package.resolved

@@ -8,14 +8,12 @@ let package = Package(
     ],
     dependencies: [
         .package(url: "https://github.com/apple/swift-nio.git", .upToNextMajor(from: "2.10.1")),
-        .package(url: "https://github.com/wickwirew/Runtime.git", .upToNextMinor(from: "2.1.0"))
     ],
     targets: [
         .target(
             name: "GraphQL", 
             dependencies: [
                 .product(name: "NIO", package: "swift-nio"),
-                .product(name: "Runtime", package: "Runtime")
             ]
         ),
         .testTarget(name: "GraphQLTests", dependencies: ["GraphQL"]),

Package.swift

@@ -1,5 +1,4 @@
 import Dispatch
-import Runtime
 import NIO
 
 /**
@@ -1175,33 +1174,11 @@ func defaultResolve(
         return eventLoopGroup.next().makeSucceededFuture(value)
     }
 
-    guard let encodable = source as? Encodable else {
+    let mirror = Mirror(reflecting: source)
+    guard let value = mirror.getValue(named: info.fieldName) else {
         return eventLoopGroup.next().makeSucceededFuture(nil)
     }
-    
-    guard
-        let typeInfo = try? typeInfo(of: type(of: encodable)),
-        let property = try? typeInfo.property(named: info.fieldName)
-    else {
-        return eventLoopGroup.next().makeSucceededFuture(nil)
-    }
-    
-    guard let value = try? property.get(from: encodable) else {
-        return eventLoopGroup.next().makeSucceededFuture(nil)
-    }
-    
     return eventLoopGroup.next().makeSucceededFuture(value)
-    
-//    guard let any = try? AnyEncoder().encode(AnyEncodable(encodable)) else {
-//        return eventLoopGroup.next().newSucceededFuture(result: nil)
-//    }
-//
-//    guard let dictionary = any as? [String: Any] else {
-//        return eventLoopGroup.next().newSucceededFuture(result: nil)
-//    }
-//
-//    let value = dictionary[info.fieldName]
-//    return eventLoopGroup.next().newSucceededFuture(result: value)
 }
 
 /**

Sources/GraphQL/Execution/Execute.swift

@@ -1,5 +1,3 @@
-import Dispatch
-import Runtime
 import NIO
 
 /**

Sources/GraphQL/Subscription/Subscribe.swift

@@ -0,0 +1,22 @@
+func unwrap(_ value: Any) -> Any? {
+    let mirror = Mirror(reflecting: value)
+
+    if mirror.displayStyle != .optional {
+        return value
+    }
+
+    guard let child = mirror.children.first else {
+        return nil
+    }
+
+    return child.value
+}
+
+extension Mirror {
+    func getValue(named key: String) -> Any? {
+        guard let matched = children.filter({ $0.label == key }).first else {
+            return nil
+        }
+        return unwrap(matched.value)
+    }
+}