Bootstrap WebStudioCanvasRuntime package

src/canvas.impl.ts

@@ -0,0 +1,53 @@
+import {
+  objectRef,
+  type RuntimeContext,
+} from "@quixos/camino-package-runtime";
+
+export type PlacementInput = {
+  canvas_id: string;
+  subject_id: string;
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+  z: number;
+};
+
+const finiteNumber = (value: unknown, fallback: number) =>
+  typeof value === "number" && Number.isFinite(value) ? value : fallback;
+
+const objectId = (value: unknown, field: string) => {
+  if (typeof value !== "string" || !value.startsWith("obj:")) {
+    throw new Error(`${field} must be a Camino object ID`);
+  }
+  return value;
+};
+
+export const normalizePlacementInput = (
+  input: Record<string, unknown>,
+): PlacementInput => ({
+  canvas_id: objectId(input.canvas_id, "canvas_id"),
+  subject_id: objectId(input.subject_id, "subject_id"),
+  x: finiteNumber(input.x, 0),
+  y: finiteNumber(input.y, 0),
+  width: Math.max(220, finiteNumber(input.width, 420)),
+  height: Math.max(150, finiteNumber(input.height, 320)),
+  z: Math.trunc(finiteNumber(input.z, 0)),
+});
+
+export const createCanvas = (context: RuntimeContext) =>
+  objectRef(context.objectId);
+
+export const createPlacement = async (context: RuntimeContext) => {
+  const input = normalizePlacementInput(context.input);
+  await Promise.all([
+    context.state<number>("port:web-studio-placement-constructor:x").set(input.x),
+    context.state<number>("port:web-studio-placement-constructor:y").set(input.y),
+    context.state<number>("port:web-studio-placement-constructor:width").set(input.width),
+    context.state<number>("port:web-studio-placement-constructor:height").set(input.height),
+    context.state<number>("port:web-studio-placement-constructor:z").set(input.z),
+  ]);
+  await context.edge("port:web-studio-placement-constructor:subject").connect(input.subject_id);
+  await context.edge("port:web-studio-placement-constructor:canvas").connect(input.canvas_id);
+  return objectRef(context.objectId);
+};