From 43a8d6095b7ca5027ad39166a79faf945f184460 Mon Sep 17 00:00:00 2001
From: Peter Collins <pecolli@microsoft.com>
Date: Tue, 18 Jun 2024 12:23:12 -0400
Subject: [PATCH] Hook up load media button

---
 .../GoogleCast.Binding/ApiDefinitions.cs      |  4 ++
 .../MauiGoogleCast/MauiGoogleCast.swift       | 45 +++++++++++--------
 googlecast/macios/sample/MainPage.xaml        |  7 +++
 googlecast/macios/sample/MainPage.xaml.cs     | 21 ++++++---
 4 files changed, 51 insertions(+), 26 deletions(-)

diff --git a/googlecast/macios/GoogleCast.Binding/ApiDefinitions.cs b/googlecast/macios/GoogleCast.Binding/ApiDefinitions.cs
index 974f131..07c5c33 100644
--- a/googlecast/macios/GoogleCast.Binding/ApiDefinitions.cs
+++ b/googlecast/macios/GoogleCast.Binding/ApiDefinitions.cs
@@ -14,6 +14,10 @@ interface GoogleCastManager
 		// -(void)loadMediaWithUrl:(NSString * _Nonnull)url contentType:(NSString * _Nonnull)contentType title:(NSString * _Nonnull)title subtitle:(NSString * _Nonnull)subtitle imageUrl:(NSString * _Nonnull)imageUrl imageHeight:(NSInteger)imageHeight imageWidth:(NSInteger)imageWidth;
 		[Export ("loadMediaWithUrl:contentType:title:subtitle:imageUrl:imageHeight:imageWidth:")]
 		void LoadMedia (string url, string contentType, string title, string subtitle, string imageUrl, nint imageHeight, nint imageWidth);
+
+		// +(BOOL)getIsCastSessionActive __attribute__((warn_unused_result("")));
+		[Export ("getIsCastSessionActive")]
+		bool IsCastSessionActive { get; }
 	}
 
 
diff --git a/googlecast/macios/native/MauiGoogleCast/MauiGoogleCast.swift b/googlecast/macios/native/MauiGoogleCast/MauiGoogleCast.swift
index d523b7c..f70e0d2 100644
--- a/googlecast/macios/native/MauiGoogleCast/MauiGoogleCast.swift
+++ b/googlecast/macios/native/MauiGoogleCast/MauiGoogleCast.swift
@@ -13,24 +13,28 @@ public class GoogleCastManager : NSObject, GCKLoggerDelegate, GCKRequestDelegate
     
     let kReceiverAppID = kGCKDefaultMediaReceiverApplicationID
     let kDebugLoggingEnabled = true
-
+    
     @objc
     public func configure() {
         let criteria = GCKDiscoveryCriteria(applicationID: kReceiverAppID)
-            let options = GCKCastOptions(discoveryCriteria: criteria)
-            GCKCastContext.setSharedInstanceWith(options)
-
-            // Enable logger.
-            GCKLogger.sharedInstance().delegate = self
-
+        let options = GCKCastOptions(discoveryCriteria: criteria)
+        GCKCastContext.setSharedInstanceWith(options)
+        
+        // Enable logger.
+        GCKLogger.sharedInstance().delegate = self
     }
     
     @objc
     public func loadMedia(url: String, contentType: String, title: String, subtitle: String, imageUrl: String, imageHeight: Int, imageWidth: Int) {
+        if !getIsCastSessionActive() {
+            logMessage("cast session not found, please start one", at: GCKLoggerLevel.error, fromFunction: "loadMedia", location: "line 31")
+            return
+        }
+        
         let url = URL.init(string: url)
         guard let mediaURL = url else {
-          print("invalid mediaURL")
-          return
+            logMessage("invalid mediaURL", at: GCKLoggerLevel.error, fromFunction: "loadMedia", location: "line 36")
+            return
         }
         
         let metadata = GCKMediaMetadata()
@@ -39,28 +43,31 @@ public class GoogleCastManager : NSObject, GCKLoggerDelegate, GCKRequestDelegate
         metadata.addImage(GCKImage(url: URL(string: imageUrl)!,
                                    width: imageHeight,
                                    height: imageWidth))
-
+        
         let mediaInfoBuilder = GCKMediaInformationBuilder.init(contentURL: mediaURL)
         mediaInfoBuilder.streamType = GCKMediaStreamType.none;
         mediaInfoBuilder.contentType = contentType //eg: video/mp4
         mediaInfoBuilder.metadata = metadata;
         let mediaInformation = mediaInfoBuilder.build()
-
-        let sessionManager = GCKCastContext.sharedInstance().sessionManager
-        if let request = sessionManager.currentSession?.remoteMediaClient?.loadMedia(mediaInformation) {
-          request.delegate = self
+        
+        if let request = GCKCastContext.sharedInstance().sessionManager.currentSession?.remoteMediaClient?.loadMedia(mediaInformation) {
+            request.delegate = self
         }
     }
     
+    @objc
+    public func getIsCastSessionActive() -> Bool {
+        return GCKCastContext.sharedInstance().sessionManager.currentSession != nil
+    }
     
     public func logMessage(_ message: String,
-                      at level: GCKLoggerLevel,
-                      fromFunction function: String,
-                      location: String) {
+                           at level: GCKLoggerLevel,
+                           fromFunction function: String,
+                           location: String) {
         if (kDebugLoggingEnabled) {
-          print(function + " - " + message)
+            print(function + " - " + message)
         }
-      }
+    }
 }
 
 
diff --git a/googlecast/macios/sample/MainPage.xaml b/googlecast/macios/sample/MainPage.xaml
index 4c8580f..0246c5e 100644
--- a/googlecast/macios/sample/MainPage.xaml
+++ b/googlecast/macios/sample/MainPage.xaml
@@ -18,6 +18,13 @@
                 Style="{StaticResource SubHeadline}"/>
 
             <local:GoogleCastButtonView x:Name="GoogleCastButton" />
+
+            <Button
+                x:Name="LoadMediaBtn"
+                Text="Cast Media"
+                Clicked="OnLoadMediaBtnClicked"
+                HorizontalOptions="Fill" />
+
         </VerticalStackLayout>
     </ScrollView>
 
diff --git a/googlecast/macios/sample/MainPage.xaml.cs b/googlecast/macios/sample/MainPage.xaml.cs
index 7f0edda..1688679 100644
--- a/googlecast/macios/sample/MainPage.xaml.cs
+++ b/googlecast/macios/sample/MainPage.xaml.cs
@@ -26,12 +26,19 @@ protected override async void OnAppearing()
 
 	void OnLoadMediaBtnClicked(object sender, EventArgs e)
 	{
-		googleCastManager?.LoadMedia("https://www.sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4",
-			"video/mp4",
-			"Big Buck Bunny",
-			"Big Buck Bunny (open-source movie)",
-			"https://peach.blender.org/wp-content/uploads/title_anouncement.jpg",
-			100,
-			100);
+		if (!googleCastManager?.IsCastSessionActive ?? true)
+		{
+			DisplayAlert("Error", "Please tap the cast button to begin casting.", "OK");
+			return;
+		}
+
+		googleCastManager?.LoadMedia(
+				"https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4",
+				"video/mp4",
+				"Big Buck Bunny (2008)",
+				"Big Buck Bunny tells the story of a giant rabbit with a heart bigger than himself.",
+				"https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/images/BigBuckBunny.jpg",
+				480,
+				360);
 	}
 }