fix(template-engine): resolve TemplateEngine-015,016 — cascade-rename nested derived templates, correct composed-script ParentPath

src/ScadaLink.TemplateEngine/Flattening/FlatteningService.cs

@@ -714,7 +714,7 @@ public class FlatteningService
 
             foreach (var composition in compositions)
                 ResolveComposedScriptsRecursive(
-                    composition, composition.InstanceName,
+                    composition, composition.InstanceName, parentPath: "",
                     compositionMap, composedTemplateChains, scripts, scriptCanonicalById,
                     new HashSet<int>());
         }
@@ -723,11 +723,17 @@ public class FlatteningService
     /// <summary>
     /// Recursively resolves the scripts of a composed module and every module
     /// nested inside it, path-qualifying each canonical name with the
-    /// accumulated <paramref name="prefix"/>.
+    /// accumulated <paramref name="prefix"/>. <paramref name="parentPath"/> is
+    /// the path of the enclosing module — empty for a depth-1 composition
+    /// (parent is the root template) and the enclosing module's
+    /// <c>prefix</c> for deeper nesting — and is carried into each script's
+    /// <see cref="ScriptScope"/> so a nested script's <c>Parent.X</c>
+    /// resolves against its real parent module.
     /// </summary>
     private static void ResolveComposedScriptsRecursive(
         TemplateComposition composition,
         string prefix,
+        string parentPath,
         IReadOnlyDictionary<int, IReadOnlyList<TemplateComposition>> compositionMap,
         IReadOnlyDictionary<int, IReadOnlyList<Template>> composedTemplateChains,
         Dictionary<string, ResolvedScript> scripts,
@@ -747,7 +753,7 @@ public class FlatteningService
                 {
                     CanonicalName = canonicalName,
                     Source = "Composed",
-                    Scope = new Commons.Types.Scripts.ScriptScope(SelfPath: prefix, ParentPath: "")
+                    Scope = new Commons.Types.Scripts.ScriptScope(SelfPath: prefix, ParentPath: parentPath)
                 };
             }
         }
@@ -762,7 +768,7 @@ public class FlatteningService
 
             foreach (var nested in nestedCompositions)
                 ResolveComposedScriptsRecursive(
-                    nested, $"{prefix}.{nested.InstanceName}",
+                    nested, $"{prefix}.{nested.InstanceName}", parentPath: prefix,
                     compositionMap, composedTemplateChains, scripts, scriptCanonicalById, visited);
         }
     }