Build and activate checked component packages through normal source authoring (WI-12)

src/capability-language/controller-scaffold.ts

@@ -0,0 +1,42 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import type { ScaffoldRecipe } from "./scaffold-recipes.js";
+import type { StructuralRequest } from "./structural-plan.js";
+export async function scaffoldController(
+  root: string,
+  prefix: string,
+  spec: ScaffoldRecipe,
+): Promise<StructuralRequest> {
+  const entry = { id: spec.id, ...spec.controller };
+  const fields = ["id", "subject", "snapshot", "remote", "input"];
+  if (
+    Object.keys(entry).length !== fields.length ||
+    fields.some((key) => typeof (entry as Record<string, unknown>)[key] !== "string") ||
+    !["unit", "value"].includes(entry.input ?? "")
+  )
+    throw Error("Controller requires id, subject, snapshot, remote and input (unit/value)");
+  const file = prefix + "quixos.controllers.json";
+  let before: string | undefined;
+  try {
+    before = await fs.readFile(path.join(root, file), "utf8");
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code !== "ENOENT") throw error;
+  }
+  const catalog = before ? JSON.parse(before) : { schemaVersion: 1, controllers: [] };
+  if (
+    catalog.schemaVersion !== 1 ||
+    !Array.isArray(catalog.controllers) ||
+    catalog.controllers.length >= 1000 ||
+    catalog.controllers.some((c: { id: string }) => c.id === entry.id)
+  )
+    throw Error("Invalid catalog or duplicate controller ID");
+  catalog.controllers.push(entry);
+  const content = JSON.stringify(catalog, null, 2) + "\n";
+  return {
+    kind: "package",
+    source: spec.source,
+    resourceRoot: spec.directory,
+    validation: "syntax",
+    files: [before === undefined ? { file, create: content } : { file, expected: before, replace: content }],
+  };
+}