add auto-highlighting of selected/updated code

src/domain/Category.ts

@@ -3,15 +3,7 @@ import { IScript } from './IScript';
 import { ICategory } from './ICategory';
 
 export class Category extends BaseEntity<number> implements ICategory {
-    private static validate(category: ICategory) {
-        if (!category.name) {
-            throw new Error('name is null or empty');
-        }
-        if ((!category.subCategories || category.subCategories.length === 0) &&
-            (!category.scripts || category.scripts.length === 0)) {
-            throw new Error('A category must have at least one sub-category or scripts');
-        }
-    }
+    private allSubScripts: ReadonlyArray<IScript> = undefined;
 
     constructor(
         id: number,
@@ -20,6 +12,27 @@ export class Category extends BaseEntity<number> implements ICategory {
         public readonly subCategories?: ReadonlyArray<ICategory>,
         public readonly scripts?: ReadonlyArray<IScript>) {
         super(id);
-        Category.validate(this);
+        validateCategory(this);
+    }
+
+    public getAllScriptsRecursively(): readonly IScript[] {
+        return this.allSubScripts || (this.allSubScripts = parseScriptsRecursively(this));
+    }
+}
+
+function parseScriptsRecursively(category: ICategory): ReadonlyArray<IScript> {
+    return [
+        ...category.scripts,
+        ...category.subCategories.flatMap((c) => c.getAllScriptsRecursively()),
+    ];
+}
+
+function validateCategory(category: ICategory) {
+    if (!category.name) {
+        throw new Error('undefined or empty name');
+    }
+    if ((!category.subCategories || category.subCategories.length === 0) &&
+        (!category.scripts || category.scripts.length === 0)) {
+        throw new Error('A category must have at least one sub-category or script');
     }
 }

src/domain/ICategory.ts

@@ -7,6 +7,7 @@ export interface ICategory extends IEntity<number>, IDocumentable {
     readonly name: string;
     readonly subCategories?: ReadonlyArray<ICategory>;
     readonly scripts?: ReadonlyArray<IScript>;
+    getAllScriptsRecursively(): ReadonlyArray<IScript>;
 }
 
 export { IEntity } from '../infrastructure/Entity/IEntity';