feat: initial webapp structure from notion2site

lib/db.ts

@@ -0,0 +1,48 @@
+import * as firestore from '@google-cloud/firestore'
+import * as types from './types'
+import * as config from './env'
+
+export const db = new firestore.Firestore({
+  projectId: config.googleProjectId,
+  credentials: config.googleApplicationCredentials
+})
+export const images = db.collection(config.firebaseCollectionImages)
+
+export async function get<T extends types.Model>(
+  doc: firestore.DocumentReference,
+  userId?: string
+): Promise<T> {
+  const snapshot = await doc.get()
+
+  if (snapshot.exists) {
+    const res = getSnapshot<T>(snapshot)
+
+    if (userId && res.userId && res.userId !== userId) {
+      throw {
+        message: 'Unauthorized',
+        status: 403
+      }
+    }
+
+    return res
+  }
+
+  throw {
+    message: 'Not found',
+    status: 404
+  }
+}
+
+export function getSnapshot<T extends types.Model>(
+  snapshot: firestore.DocumentSnapshot<firestore.DocumentData>
+): T {
+  const data = snapshot.data()
+  delete data.timestamp
+
+  return {
+    ...data,
+    id: snapshot.id,
+    createdAt: (snapshot.createTime.toDate().getTime() / 1000) | 0,
+    updatedAt: (snapshot.updateTime.toDate().getTime() / 1000) | 0
+  } as T
+}