Add interface to get navigator.userAgent in unity

Useful to check if you're on mobile

Author: JohannesDeml

Assets/Plugins/WebGL/WebGLTools/WebGlBridge.Commands.cs

@@ -122,6 +122,18 @@ public void ToggleInfoPanel()
 			WebGlPlugins.ToggleInfoPanel();
 		}
 
+		/// <summary>
+		/// Log the user agent of the browser and if this agent is classified as mobile
+		/// Browser Usage: <code>unityGame.SendMessage("WebGL", "LogUserAgent");</code>
+		/// </summary>
+		[WebGlCommand(Description = "Log User Agent and isMobileDevice")]
+		public void LogUserAgent()
+		{
+			string userAgent = WebGlPlugins.GetUserAgent();
+			bool isMobileDevice = WebGlPlugins.IsMobileDevice();
+			Debug.Log($"<color=#4D65A4>User Agent:</color> '{userAgent}', <color=#4D65A4>IsMobileDevice:</color> '{isMobileDevice}'");
+		}
+
 		/// <summary>
 		/// Log example messages to show off unity rich text parsing to html & console styling
 		/// </summary>

Assets/Plugins/WebGL/WebGLTools/WebGlPlugins.cs

@@ -29,6 +29,8 @@ public static class WebGlPlugins
 		[DllImport("__Internal")]
 		private static extern void _HideInfoPanel();
 		[DllImport("__Internal")]
+		private static extern string _GetUserAgent();
+		[DllImport("__Internal")]
 		private static extern uint _GetTotalMemorySize();
 		[DllImport("__Internal")]
 		private static extern uint _GetStaticMemorySize();
@@ -51,7 +53,7 @@ public static void SetVariable(string variableName, string value)
 			#endif
 			Debug.Log($"<color=#00CCCC>{nameof(WebGlPlugins)}.{nameof(SetVariable)} set {variableName}: {value}</color>");
 		}
-		
+
 		/// <summary>
 		/// Adds a time marker at the call time to the javascript map "unityTimeTrackers"
 		/// The mapped value is performance.now() at the time of the call
@@ -65,7 +67,7 @@ public static void AddTimeTrackingEvent(string eventName)
 			Debug.Log($"{nameof(WebGlPlugins)}.{nameof(AddTimeTrackingEvent)} called with {eventName}");
 			#endif
 		}
-		
+
 		/// <summary>
 		/// Show the info panel in the top right corner
 		/// By default triggered by <see cref="WebGlTimeTracker"/> in Awake
@@ -80,7 +82,7 @@ public static void ShowInfoPanel()
 			Debug.Log($"{nameof(WebGlPlugins)}.{nameof(ShowInfoPanel)} called");
 			#endif
 		}
-		
+
 		/// <summary>
 		/// Hide the info panel in the top right corner
 		/// By default triggered by <see cref="WebGlTimeTracker"/> in Awake
@@ -111,6 +113,33 @@ public static void ToggleInfoPanel()
 			}
 		}
 
+		/// <summary>
+		/// Get navigator.userAgent from the browser
+		/// </summary>
+		/// <returns>navigator.userAgent</returns>
+		public static string GetUserAgent()
+		{
+			#if UNITY_WEBGL && !UNITY_EDITOR
+			return _GetUserAgent();
+			#else
+			Debug.Log($"{nameof(WebGlPlugins)}.{nameof(GetUserAgent)} called");
+			return "undefined";
+			#endif
+		}
+
+		/// <summary>
+		/// Check user agent to determine if the game runs on a mobile device
+		/// </summary>
+		/// <returns>true if on phone or tablet</returns>
+		public static bool IsMobileDevice()
+		{
+			string userAgent = GetUserAgent();
+			return userAgent.Contains("iPhone") ||
+				userAgent.Contains("iPad") ||
+				userAgent.Contains("iPod") ||
+				userAgent.Contains("Android");
+		}
+
 		/// <summary>
 		/// Get the total memory size used by the application in MB
 		/// </summary>
@@ -194,7 +223,7 @@ public static float GetManagedMemorySize()
 			var bytes = (uint) GC.GetTotalMemory(false);
 			return GetMegaBytes(bytes);
 		}
-		
+
 		/// <summary>
 		/// Converts bytes (B) to mega bytes (MB)
 		/// </summary>

Assets/Plugins/WebGL/WebGLTools/WebGlPlugins.jslib

@@ -60,7 +60,26 @@ var WebGlPlugins =
             setInfoPanelVisible(false);
         }
     },
-    
+
+    _GetUserAgent: function () {
+        var userAgent = navigator.userAgent;
+
+        //Get size of the string
+        var bufferSize = lengthBytesUTF8(userAgent) + 1;
+        //Allocate memory space
+        var buffer = _malloc(bufferSize);
+
+        //Copy old data to the new one then return it
+        if(typeof stringToUTF8 !== 'undefined') {
+            stringToUTF8(userAgent, buffer, bufferSize);
+        }
+        else if(typeof writeStringToMemory !== 'undefined') {
+            writeStringToMemory(userAgent, buffer);
+        }
+
+        return buffer;
+    },
+
     _GetTotalMemorySize: function()
     {
         if(typeof TOTAL_MEMORY !== 'undefined') {