Source

// Writes and owner reads through the Bounded SDK. Loaded only when someone makes or manages a paste,
// so opening a paste never loads the SDK.
import { get, set, setMany, serverTimestamp } from "@bounded-sh/client";
import { me } from "./bounded";
import { randomId, randomKey } from "../../functions/lib/paste";

export interface Paste { content: string; title: string; language: string; ttl: number; burn: boolean; encrypted: boolean; createdAt: number }
export interface NewPaste { content: string; title: string; language: string; ttl: number; burn: boolean; encrypted: boolean }

/** Starts the guest session early, while someone is still typing. */
export const warm = () => me().then(() => {});

/** Saves a paste with this browser as its owner, in one batch with its owner key. */
export async function createPaste(paste: NewPaste): Promise<{ id: string; key: string }> {
  const uid = await me();
  const id = randomId();
  const key = randomKey();
  await setMany([
    { path: `pastes/${id}`, document: { ...paste, opened: false, createdBy: uid, createdAt: serverTimestamp() } },
    { path: `pastes/${id}/owners/${uid}`, document: { at: serverTimestamp() } },
    { path: `pastekeys/${id}`, document: { key } },
  ]);
  return { id, key };
}

async function read(id: string): Promise<Paste | null> {
  try {
    return ((await get(`pastes/${id}`)) as Paste | null) ?? null;
  } catch {
    return null;
  }
}

/** Reads a paste as its owner, first becoming one with the key if this browser is not yet. Null when it is gone or the key does not work. */
export async function openPaste(id: string, key: string): Promise<Paste | null> {
  const uid = await me();
  const paste = await read(id);
  if (paste) return paste;
  try {
    await setMany([
      { path: `pasteclaims/${id}/c/${uid}`, document: { key } },
      { path: `pastes/${id}/owners/${uid}`, document: { at: serverTimestamp() } },
    ]);
  } catch {
    return null;
  }
  return read(id);
}

export const updatePaste = (id: string, patch: Partial<Pick<Paste, "content" | "title" | "language">>) => set(`pastes/${id}`, patch);
export const deletePaste = (id: string) => set(`pastes/${id}`, null);