refactor: Move encoding to compact encoder

Author: kylef

Sources/JWT/CompactJSONEncoder.swift

@@ -6,4 +6,12 @@ class CompactJSONEncoder: JSONEncoder {
   func encodeString<T: Encodable>(_ value: T) throws -> String {
     return base64encode(try super.encode(value))
   }
+
+  func encodeString(_ value: [String: Any]) -> String? {
+    if let data = try? JSONSerialization.data(withJSONObject: value) {
+      return base64encode(data)
+    }
+
+    return nil
+  }
 }

Sources/JWT/Encode.swift

@@ -8,22 +8,14 @@ import Foundation
 public func encode(claims: ClaimSet, algorithm: Algorithm, headers: [String: String]? = nil) -> String {
   let encoder = CompactJSONEncoder()
 
-  func encodeJSON(_ payload: [String: Any]) -> String? {
-    if let data = try? JSONSerialization.data(withJSONObject: payload) {
-      return base64encode(data)
-    }
-
-    return nil
-  }
-
   var headers = headers ?? [:]
   if !headers.keys.contains("typ") {
     headers["typ"] = "JWT"
   }
   headers["alg"] = algorithm.description
 
   let header = try! encoder.encodeString(headers)
-  let payload = encodeJSON(claims.claims)!
+  let payload = encoder.encodeString(claims.claims)!
   let signingInput = "\(header).\(payload)"
   let signature = algorithm.sign(signingInput)
   return "\(signingInput).\(signature)"