From 2ec2022dced94ae75471598ea72a2d9c63c6a3a9 Mon Sep 17 00:00:00 2001
From: Lars Vierbergen <lars.vierbergen@xenit.eu>
Date: Tue, 5 Nov 2024 08:31:51 +0100
Subject: [PATCH] [ACC-1682] Add HalFormsTemplateBuilder#fromTemplate method

Add ability to easily create a builder from an existing hal forms template,
to modify the template when it's necessary
---
 packages/hal-forms/__tests__/builder.ts | 16 ++++++++++++++++
 packages/hal-forms/src/builder.ts       | 12 ++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 packages/hal-forms/__tests__/builder.ts

diff --git a/packages/hal-forms/__tests__/builder.ts b/packages/hal-forms/__tests__/builder.ts
new file mode 100644
index 0000000..3953ed2
--- /dev/null
+++ b/packages/hal-forms/__tests__/builder.ts
@@ -0,0 +1,16 @@
+import buildTemplate, { HalFormsTemplateBuilder } from "../src/builder";
+
+describe("HalFormsTemplateBuilder", () => {
+    it("#fromTemplate", () => {
+        const original = buildTemplate("GET", "/")
+            .withContentType("application/json")
+            .addProperty("xyz", p => p.withPrompt("Test"));
+
+        const fromTemplate = HalFormsTemplateBuilder.fromTemplate(original);
+
+        expect(fromTemplate.contentType).toEqual("application/json");
+        expect(fromTemplate.properties).toHaveLength(1);
+        expect(fromTemplate.properties[0]?.name).toEqual("xyz");
+        expect(fromTemplate.properties[0]?.prompt).toEqual("Test");
+    })
+});
diff --git a/packages/hal-forms/src/builder.ts b/packages/hal-forms/src/builder.ts
index 92859fc..2edaef6 100644
--- a/packages/hal-forms/src/builder.ts
+++ b/packages/hal-forms/src/builder.ts
@@ -19,6 +19,18 @@ export class HalFormsTemplateBuilder<Body, Response> implements HalFormsTemplate
         return new HalFormsTemplateBuilder(request.method + " "+request.url, request);
     }
 
+    public static fromTemplate<B, R>(template: HalFormsTemplate<TypedRequestSpec<B, R>>): HalFormsTemplateBuilder<B, R> {
+        let builder = this.from(template.request)
+            .withName(template.name)
+            .withContentType(template.contentType);
+
+        for (const prop of template.properties) {
+            builder = builder.addProperty(prop.name, () => prop);
+        }
+
+        return builder;
+    }
+
     public get title() {
         return undefined;
     }