Initial electronics inventory webapp

KV-store backed Express 5 app for tracking electronic components,
their arbitrary fields, and inventory locations (physical, BOM, digital).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/storage.mjs

@@ -0,0 +1,82 @@
+import { mkdirSync } from 'node:fs';
+import { Simple_KeyValue_Store } from './kv-store.mjs';
+
+mkdirSync('./data', { recursive: true });
+
+const store = new Simple_KeyValue_Store('./data/inventory.ndjson', {
+	auto_load: true,
+	auto_store: true,
+	debounce_flush_timeout: 5000,
+});
+
+// --- Field definitions ---
+
+export function list_fields() {
+	const result = [];
+	for (const [key] of store.data.entries()) {
+		if (key.startsWith('f:')) {
+			result.push(store.get(key));
+		}
+	}
+	return result.sort((a, b) => a.name.localeCompare(b.name));
+}
+
+export function get_field(id) {
+	return store.get(`f:${id}`) ?? null;
+}
+
+export function set_field(field) {
+	store.set(`f:${field.id}`, field);
+}
+
+export function delete_field(id) {
+	return store.delete(`f:${id}`);
+}
+
+// --- Components ---
+
+export function list_components() {
+	const result = [];
+	for (const [key] of store.data.entries()) {
+		if (key.startsWith('c:')) {
+			result.push(store.get(key));
+		}
+	}
+	return result.sort((a, b) => a.name.localeCompare(b.name));
+}
+
+export function get_component(id) {
+	return store.get(`c:${id}`) ?? null;
+}
+
+export function set_component(component) {
+	store.set(`c:${component.id}`, component);
+}
+
+export function delete_component(id) {
+	return store.delete(`c:${id}`);
+}
+
+// --- Inventory entries ---
+
+export function list_inventory() {
+	const result = [];
+	for (const [key] of store.data.entries()) {
+		if (key.startsWith('i:')) {
+			result.push(store.get(key));
+		}
+	}
+	return result.sort((a, b) => a.created_at - b.created_at);
+}
+
+export function get_inventory_entry(id) {
+	return store.get(`i:${id}`) ?? null;
+}
+
+export function set_inventory_entry(entry) {
+	store.set(`i:${entry.id}`, entry);
+}
+
+export function delete_inventory_entry(id) {
+	return store.delete(`i:${id}`);
+}