moved workflow sharing from api to server side actions (#257)

apps/rowboat/app/actions/shared-workflow.actions.ts

@@ -0,0 +1,68 @@
+"use server";
+
+import { z } from "zod";
+import { nanoid } from "nanoid";
+import { Workflow } from "@/app/lib/types/workflow_types";
+import { db } from "@/app/lib/mongodb";
+import { SHARED_WORKFLOWS_COLLECTION } from "@/src/infrastructure/repositories/mongodb.shared-workflows.indexes";
+
+const DEFAULT_TTL_SECONDS = 60 * 60 * 24; // 24 hours
+
+interface SharedWorkflowDoc {
+  _id: string;
+  workflow: unknown;
+  createdAt: Date;
+  expiresAt: Date;
+}
+
+function validateWorkflowJson(obj: unknown) {
+  const parsed = Workflow.safeParse(obj);
+  if (!parsed.success) {
+    const message = parsed.error.issues.map(i => `${i.path.join('.')}: ${i.message}`).join('; ');
+    throw new Error(`Invalid workflow JSON: ${message}`);
+  }
+  return parsed.data;
+}
+
+export async function createSharedWorkflowFromJson(json: string): Promise<{ id: string; ttlSeconds: number; }>
+{
+  const obj = JSON.parse(json);
+  const workflow = validateWorkflowJson(obj);
+
+  const coll = db.collection<SharedWorkflowDoc>(SHARED_WORKFLOWS_COLLECTION);
+  const id = nanoid();
+  const now = new Date();
+  const expiresAt = new Date(now.getTime() + DEFAULT_TTL_SECONDS * 1000);
+  await coll.insertOne({ _id: id, workflow, createdAt: now, expiresAt });
+
+  return { id, ttlSeconds: DEFAULT_TTL_SECONDS };
+}
+
+export async function loadSharedWorkflow(idOrUrl: string): Promise<z.infer<typeof Workflow>> {
+  // If it's an http(s) URL, fetch JSON and validate
+  const isHttp = idOrUrl.startsWith('http://') || idOrUrl.startsWith('https://');
+  if (isHttp) {
+    const resp = await fetch(idOrUrl, { cache: 'no-store' });
+    if (!resp.ok) {
+      throw new Error(`Failed to fetch URL: ${resp.status} ${resp.statusText}`);
+    }
+    const text = await resp.text();
+    const obj = JSON.parse(text);
+    return validateWorkflowJson(obj);
+  }
+
+  // Otherwise, look up by shared id in MongoDB
+  const coll = db.collection<SharedWorkflowDoc>(SHARED_WORKFLOWS_COLLECTION);
+  const doc = await coll.findOne(
+    { _id: idOrUrl },
+    { projection: { workflow: 1, expiresAt: 1 } }
+  );
+  if (!doc) {
+    throw new Error('Not found or expired');
+  }
+  if (doc.expiresAt && doc.expiresAt.getTime() <= Date.now()) {
+    throw new Error('Not found or expired');
+  }
+  return validateWorkflowJson(doc.workflow);
+}
+