65 lines
1.7 KiB
TypeScript
65 lines
1.7 KiB
TypeScript
import { CURRENT_MESSAGE_MARKER } from "./mentions.js";
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export const HISTORY_CONTEXT_MARKER =
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"[Chat messages since your last reply - for context]";
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export const DEFAULT_GROUP_HISTORY_LIMIT = 50;
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export type HistoryEntry = {
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sender: string;
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body: string;
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timestamp?: number;
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messageId?: string;
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};
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export function buildHistoryContext(params: {
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historyText: string;
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currentMessage: string;
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lineBreak?: string;
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}): string {
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const { historyText, currentMessage } = params;
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const lineBreak = params.lineBreak ?? "\n";
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if (!historyText.trim()) return currentMessage;
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return [
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HISTORY_CONTEXT_MARKER,
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historyText,
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"",
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CURRENT_MESSAGE_MARKER,
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currentMessage,
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].join(lineBreak);
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}
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export function appendHistoryEntry(params: {
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historyMap: Map<string, HistoryEntry[]>;
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historyKey: string;
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entry: HistoryEntry;
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limit: number;
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}): HistoryEntry[] {
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const { historyMap, historyKey, entry } = params;
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if (params.limit <= 0) return [];
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const history = historyMap.get(historyKey) ?? [];
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history.push(entry);
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while (history.length > params.limit) history.shift();
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historyMap.set(historyKey, history);
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return history;
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}
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export function buildHistoryContextFromEntries(params: {
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entries: HistoryEntry[];
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currentMessage: string;
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formatEntry: (entry: HistoryEntry) => string;
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lineBreak?: string;
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excludeLast?: boolean;
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}): string {
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const lineBreak = params.lineBreak ?? "\n";
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const entries = params.excludeLast === false
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? params.entries
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: params.entries.slice(0, -1);
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if (entries.length === 0) return params.currentMessage;
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const historyText = entries.map(params.formatEntry).join(lineBreak);
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return buildHistoryContext({
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historyText,
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currentMessage: params.currentMessage,
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lineBreak,
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});
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}
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