FF-1715: New flow element Is From Library

BasicNodes/Functions/IsFromLibrary.cs

@@ -0,0 +1,46 @@
+using FileFlows.Plugin;
+using FileFlows.Plugin.Attributes;
+
+namespace FileFlows.BasicNodes.Functions;
+
+/// <summary>
+/// Flow element that checks if a file is from the specified library
+/// </summary>
+public class IsFromLibrary : Node
+{
+    /// <inheritdoc />
+    public override int Inputs => 1;
+    /// <inheritdoc />
+    public override int Outputs => 2;
+    /// <inheritdoc />
+    public override FlowElementType Type => FlowElementType.Logic;
+    /// <inheritdoc />
+    public override string HelpUrl => "https://fileflows.com/docs/plugins/basic-nodes/is-from-library";
+    /// <inheritdoc /> 
+    public override string Icon => "fas fa-question";
+    
+    /// <summary>
+    /// Gets or sets the library to test for
+    /// </summary>
+    [Select("LIBRARY_LIST", 1)]
+    public ObjectReference Library { get; set; }
+
+    /// <inheritdoc />
+    public override int Execute(NodeParameters args)
+    {
+        if (args.Library == null)
+        {
+            args.FailureReason = "Library is null in Flow";
+            args.Logger?.ELog(args.FailureReason);
+            return -1;
+        }
+        if (Library.Uid == args.Library.Uid)
+        {
+            args.Logger?.ILog("Is from library: " + args.Library.Name);
+            return 1;
+        }
+
+        args.Logger?.ILog("Is not from library: " + args.Library.Name);
+        return 2;
+    }
+}