Second version of our transform, which adds a filter for only Value decorator nodes!

transform-value.v2.ts

// Dependencies:
import { tsquery } from '@phenomnomnominal/tsquery';
import { Node, visitNode, SourceFile, TransformationContext, Transformer, TransformerFactory } from 'typescript';

// Constants:
const CAST_PROPERTIES_QUERY = `PropertyDeclaration:has(Decorator:has(Identifier[name="Value"]))`;

export function transformer (source: SourceFile): TransformerFactory<Node> {
    const castProperties = tsquery(source, CAST_PROPERTIES_QUERY);
    return valueDecoratorToGetterAndSetterFactory(castProperties);
}

export function valueDecoratorToGetterAndSetterFactory (nodes: Array<Node>): TransformerFactory<Node> {
    return function (context: TransformationContext): Transformer<Node> {
        return function (node: Node): Node {
            return visitNode(node, visit);
        };

        function visit (node: Node): Node | Array<Node> {
            node = visitEachChild(node, visit, context);
            if (nodes.includes(node)) {
                // do something
            }
            return node;
        }
    };
}