Streamline Podcast handler code with a POSO

Sources/ForemWebView/ForemMediaManager/ForemMediaManager.swift

@@ -47,6 +47,33 @@ class ForemMediaManager: NSObject {
         }
     }
 
+    internal func handle(_ podcast: Podcast) {
+        switch podcast.action {
+        case .play:
+            play(audioUrl: podcast.url, at: podcast.seconds)
+        case .load:
+            load(audioUrl: podcast.url)
+        case .seek:
+            seek(to: podcast.seconds)
+        case .rate:
+            podcastRate = podcast.rate ?? 1
+            avPlayer?.rate = podcastRate ?? 1
+        case .muted:
+            avPlayer?.isMuted = podcast.muted ?? false
+        case .pause:
+            avPlayer?.pause()
+        case .terminate:
+            avPlayer?.pause()
+            clearObservers()
+            UIApplication.shared.endReceivingRemoteControlEvents()
+        case .volume:
+            podcastVolume = podcast.volume ?? 1
+            avPlayer?.rate = podcastVolume ?? 1
+        case .metadata:
+            break
+        }
+    }
+
     internal func handlePodcastMessage(_ message: [String: String]) {
         ensureAudioSessionIsActive()
 

Sources/ForemWebView/ForemWebView+WKScriptMessageHandler.swift

@@ -17,7 +17,10 @@ extension ForemWebView: WKScriptMessageHandler {
                                       didReceive message: WKScriptMessage) {
         switch message.name {
         case "podcast":
-            mediaManager.handlePodcastMessage(message.body as? [String: String] ?? [:])
+            if let podcast: Podcast = MessageParser().parse(json: message.body) {
+                mediaManager.handle(podcast)
+            }
+//            mediaManager.handlePodcastMessage(message.body as? [String: String] ?? [:])
         case "video":
             mediaManager.handleVideoMessage(message.body as? [String: String] ?? [:])
         case "imageUpload":
@@ -37,7 +40,8 @@ extension ForemWebView: WKScriptMessageHandler {
                 foremWebViewDelegate?.didLogin(userData: foremUser)
                 ensureForemInstance()
             }
-        default: ()
+        default:
+            break
         }
     }
 

Sources/ForemWebView/Models/Podcast.swift

@@ -0,0 +1,29 @@
+//
+//  Podcast.swift
+//  
+//
+//  Created by Daniel Chick on 10/26/22.
+//
+
+import Foundation
+
+struct Podcast: Codable {
+    let action: PodcastAction
+    let url: String?
+    let seconds: String?
+    let rate: Float?
+    let muted: Bool?
+    let volume: Float?
+}
+
+enum PodcastAction: String, Codable {
+    case play
+    case load
+    case seek
+    case rate
+    case muted
+    case pause
+    case terminate
+    case volume
+    case metadata
+}

Sources/ForemWebView/Utils/MessageParser.swift

@@ -0,0 +1,46 @@
+//
+//  MessageParser.swift
+//
+//
+//  Created by Daniel Chick on 10/26/22.
+//
+
+import Foundation
+
+public typealias Json = [String: Any]
+
+public class MessageParser {
+    public init () {}
+
+    public func parse<T: Decodable>(jsonArray: [Json]) -> T? {
+        guard let serializedInnerJSON = try? JSONSerialization.data(withJSONObject: jsonArray) else {
+            return nil
+        }
+
+        return parseObject(serializedJson: serializedInnerJSON)
+    }
+
+    public func parse<T: Decodable>(json: Json) -> T? {
+        guard let serializedInnerJSON = try? JSONSerialization.data(withJSONObject: json) else {
+            return nil
+        }
+
+        return parseObject(serializedJson: serializedInnerJSON)
+    }
+
+    public func parse<T: Decodable>(json: Any) -> T? {
+        guard let serializedInnerJSON = try? JSONSerialization.data(withJSONObject: json) else {
+            return nil
+        }
+
+        return parseObject(serializedJson: serializedInnerJSON)
+    }
+
+    private func parseObject<T: Decodable> (serializedJson: Data) -> T? {
+        do {
+            return try JSONDecoder().decode(T.self, from: serializedJson)
+        } catch {
+            return nil
+        }
+    }
+}