Ben Stull
49 lines
1.6 KiB
TypeScript
49 lines
1.6 KiB
TypeScript
/**
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* vscode-free mutations on the Artifact (spec §6.5). Keeping thread logic here
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* (not in the vscode controller) keeps it unit-testable; ThreadController is a
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* thin adapter that calls these and persists via CoauthorStore.
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*/
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import {
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newId,
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type Artifact,
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type Fingerprint,
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type Provenance,
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type ThreadStatus,
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} from "./model";
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export interface NewMessage {
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author: Provenance;
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body: string;
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}
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function message(m: NewMessage) {
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return { id: newId("m"), author: m.author, body: m.body, createdAt: new Date().toISOString() };
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}
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/** Lazily-created anchor + thread for a new region discussion (PUC-1). */
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export function addThread(
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artifact: Artifact,
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fingerprint: Fingerprint,
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first: NewMessage,
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): { threadId: string; anchorId: string } {
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const anchorId = newId("a");
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const threadId = newId("t");
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artifact.anchors[anchorId] = { fingerprint };
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artifact.threads.push({ id: threadId, anchorId, status: "open", messages: [message(first)] });
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return { threadId, anchorId };
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}
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/** Append a reply (PUC-2). Throws if the thread is unknown. */
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export function appendMessage(artifact: Artifact, threadId: string, m: NewMessage): void {
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const t = artifact.threads.find((x) => x.id === threadId);
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if (!t) throw new Error(`unknown thread id: ${threadId}`);
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t.messages.push(message(m));
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}
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/** Resolve/reopen a thread (PUC-2). Throws if the thread is unknown. */
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export function setStatus(artifact: Artifact, threadId: string, status: ThreadStatus): void {
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const t = artifact.threads.find((x) => x.id === threadId);
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if (!t) throw new Error(`unknown thread id: ${threadId}`);
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t.status = status;
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}
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