refactor(global): add comment for describe methods

Author: mslimani

ios/Runner/AppSyncPlugin.swift

@@ -11,6 +11,9 @@ import Flutter
 import AWSCore
 import AWSAppSync
 
+/*
+ * Plugin to call GraphQL requests generated from the schema
+ */
 public class AppSyncPlugin: NSObject, FlutterPlugin {
 
     static let CHANNEL_NAME = "com.ineat.appsync"
@@ -19,6 +22,7 @@ public class AppSyncPlugin: NSObject, FlutterPlugin {
     static let SUBSCRIBE_NEW_MESSAGE = "subscribeNewMessage"
     static let SUBSCRIBE_NEW_MESSAGE_RESULT = "subscribeNewMessageResult"
 
+    // Client AWS AppSync for call GraphQL requests
     var appSyncClient: AWSAppSyncClient?
 
     let channel: FlutterMethodChannel
@@ -35,6 +39,13 @@ public class AppSyncPlugin: NSObject, FlutterPlugin {
 
     public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
         prepareClient(call: call)
+        onPerformMethodCall(call: call, result: result)
+    }
+    
+    /**
+     * Handle type method. Call task for run GraphQL request
+     */
+    private func onPerformMethodCall(call: FlutterMethodCall, result: @escaping FlutterResult) {
         switch call.method {
         case AppSyncPlugin.QUERY_GET_ALL_MESSAGES:
             GetAllMessages(client: appSyncClient!).exec(flutterMethodCall: call, flutterResult: result)
@@ -47,6 +58,9 @@ public class AppSyncPlugin: NSObject, FlutterPlugin {
         }
     }
 
+    /**
+     * Create AWS AppSync Client if not exist
+     */
     private func prepareClient(call: FlutterMethodCall) {
         let args = call.arguments as! Dictionary<String, Any>
         let endpoint = args["endpoint"] as! String

ios/Runner/tasks/GetAllMessages.swift

@@ -10,6 +10,16 @@ import Foundation
 import AWSCore
 import AWSAppSync
 
+/*
+ * Task for execute the query GetAllMessages in GraphQL file
+ * query GetMessages {
+ *  getMessages {
+ *      id
+ *      content
+ *      sender
+ *  }
+ * }
+ */
 class  GetAllMessages {
 
     private let client: AWSAppSyncClient
@@ -19,7 +29,6 @@ class  GetAllMessages {
     }
 
     public func exec(flutterMethodCall: FlutterMethodCall, flutterResult: @escaping FlutterResult) {
-        let args = flutterMethodCall.arguments as! Dictionary<String,Any?>
         let query = GetMessagesQuery()
         self.client.fetch(query: query, cachePolicy: .fetchIgnoringCacheData) { (result, error) in
             if let error = error as? AWSAppSyncClientError {

ios/Runner/tasks/NewMessage.swift

@@ -10,6 +10,16 @@ import Foundation
 import AWSCore
 import AWSAppSync
 
+/*
+ * Task for execute the mutation NewMessage in GraphQL file
+ * mutation NewMessage($content: String!, $sender: String!) {
+ *  newMessage(content: $content, sender: $sender) {
+ *      id
+ *      content
+ *      sender
+ *  }
+ * }
+ */
 class NewMessage {
 
     private let client: AWSAppSyncClient

ios/Runner/tasks/SubscriptionToNewMessage.swift

@@ -10,6 +10,16 @@ import Foundation
 import AWSCore
 import AWSAppSync
 
+/*
+ * Task for execute the subscription SubscribeToNewMessage in GraphQL file
+ * subscription SubscribeToNewMessage {
+ *  subscribeToNewMessage {
+ *      id
+ *      content
+ *      sender
+ *  }
+ * }
+ */
 class SubscriptionToNewMessage {
 
     private let client: AWSAppSyncClient