add a callback before request

Author: Oleksandr Skrypnyk

Sources/Flows/OAuth2CodeGrant.swift

@@ -40,7 +40,8 @@ open class OAuth2CodeGrant: OAuth2 {
 	override open class var responseType: String? {
 		return "code"
 	}
-	
+
+	open var beforeHandlingCallback: (() -> Void)?
 
 	// MARK: - Token Request
 
@@ -79,6 +80,7 @@ open class OAuth2CodeGrant: OAuth2 {
 	override open func handleRedirectURL(_ redirect: URL) {
 		logger?.debug("OAuth2", msg: "Handling redirect URL \(redirect.description)")
 		do {
+			beforeHandlingCallback?()
 			let code = try validateRedirectURL(redirect)
 			exchangeCodeForToken(code)
 		}

p2.OAuth2.podspec

@@ -27,7 +27,7 @@ Pod::Spec.new do |s|
   }
 
   s.source       = {
-    :git => 'https://github.com/p2/OAuth2.git',
+    :git => 'https://github.com/simplepractice/OAuth2.git',
     :tag => s.version.to_s,
     :submodules => true
   }