alexion
6081e3e325
Imported as a linear vendor commit so forge rebases do not replay the upstream root tree. git-subtree-dir: third_party/pi git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0
56 lines
2.2 KiB
TypeScript
56 lines
2.2 KiB
TypeScript
// Fork a conversation.
|
|
// Run from packages/durable:
|
|
// node --conditions=source --experimental-strip-types test/examples/02-forks.ts
|
|
import { BACKGROUND_CONTEXT } from "@earendil-works/chord/context";
|
|
import { createSession, defineDoc, MemoryStorage } from "../../src/index.ts";
|
|
|
|
const context = BACKGROUND_CONTEXT;
|
|
const session = createSession(new MemoryStorage());
|
|
|
|
const Notes = defineDoc<{ text: string }>({
|
|
kind: "example.notes",
|
|
version: 1,
|
|
scope: "conversation",
|
|
history: "rewindable",
|
|
fork: "asOf",
|
|
initial: () => ({ text: "" }),
|
|
});
|
|
|
|
const chat = await session.commit((tx) => tx.createConversation({ ownership: { kind: "ownerless" } }), context);
|
|
const firstEntry = await session.commit(async (tx) => {
|
|
const entry = await tx.appendEntry(chat.id, { kind: "note", data: "hello" });
|
|
(await tx.doc(Notes, chat.id)).text = "after hello";
|
|
return entry;
|
|
}, context);
|
|
await session.commit(async (tx) => {
|
|
await tx.appendEntry(chat.id, { kind: "note", data: "goodbye" });
|
|
(await tx.doc(Notes, chat.id)).text = "after goodbye";
|
|
}, context);
|
|
|
|
// A fork is a new conversation that continues from one entry of another. It
|
|
// sees the parent's transcript up to that entry, and each document follows its
|
|
// own `fork` setting. Notes uses "asOf", so the fork starts with the notes
|
|
// value from the fork entry.
|
|
const branch = await session.commit(
|
|
(tx) => tx.forkConversation(chat.id, firstEntry.id, { ownership: { kind: "ownerless" } }),
|
|
context,
|
|
);
|
|
|
|
// scanEntries() pages through visible entries, newest first. The fork sees
|
|
// "hello" (inherited from the parent) but not "goodbye", which came later.
|
|
const branchEntries = await session.commit((tx) => tx.scanEntries({ conversationId: branch.id }, 10), context);
|
|
console.log(
|
|
"fork transcript:",
|
|
branchEntries.items.map((entry) => entry.data),
|
|
);
|
|
console.log("fork notes:", await session.snapshot(Notes, branch.id, context));
|
|
|
|
// The fork's copy is independent: editing it leaves the parent unchanged.
|
|
await session.commit(async (tx) => {
|
|
(await tx.doc(Notes, branch.id)).text = "changed only in the fork";
|
|
}, context);
|
|
console.log("fork notes after edit:", await session.snapshot(Notes, branch.id, context));
|
|
console.log("parent notes after edit:", await session.snapshot(Notes, chat.id, context));
|
|
|
|
await session.close(context);
|