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import path from "node:path";
import { logger } from "./logger";
import { ingestUpvotedAnswer } from "./guide";
const DATA_DIR = path.resolve(process.cwd(), "data");
const FEEDBACK_FILE = path.join(DATA_DIR, "feedback.jsonl");
export interface FeedbackEntry {
ts: number;
query: string;
rating: "up" | "down";
sources: string[];
answer?: string;
}
const sourceScore: Map<string, { up: number; down: number }> = new Map();
const queryTermAffinity: Map<string, Map<string, number>> = new Map();
let totalUp = 0;
let totalDown = 0;
let loaded = false;
function tokenize(q: string): string[] {
return q
.toLowerCase()
.split(/[^\p{L}\p{N}]+/u)
.filter((t) => t.length >= 3)
.slice(0, 20);
}
function applyEntry(e: FeedbackEntry) {
const isUp = e.rating === "up";
if (isUp) totalUp++;
else totalDown++;
for (const s of e.sources ?? []) {
if (!s || typeof s !== "string") continue;
const cur = sourceScore.get(s) ?? { up: 0, down: 0 };
if (isUp) cur.up++;
else cur.down++;
sourceScore.set(s, cur);
}
const delta = isUp ? 1 : -1;
for (const term of tokenize(e.query)) {
const m = queryTermAffinity.get(term) ?? new Map<string, number>();
for (const s of e.sources ?? []) {
if (!s) continue;
m.set(s, (m.get(s) ?? 0) + delta);
}
queryTermAffinity.set(term, m);
}
}
export function loadFeedback(): void {
if (loaded) return;
loaded = true;
try {
fs.mkdirSync(DATA_DIR, { recursive: true });
if (!fs.existsSync(FEEDBACK_FILE)) {
logger.info("Feedback log empty (no prior ratings)");
return;
}
const text = fs.readFileSync(FEEDBACK_FILE, "utf-8");
let n = 0;
for (const line of text.split("\n")) {
if (!line.trim()) continue;
try {
const e = JSON.parse(line) as FeedbackEntry;
applyEntry(e);
n++;
} catch {
// skip malformed line
}
}
logger.info(
{ entries: n, sources: sourceScore.size, up: totalUp, down: totalDown },
"Feedback log loaded",
);
} catch (err) {
logger.warn({ err }, "Failed to load feedback log");
}
}
export function recordFeedback(
e: Omit<FeedbackEntry, "ts">,
): FeedbackEntry | null {
const entry: FeedbackEntry = { ts: Date.now(), ...e };
try {
fs.mkdirSync(DATA_DIR, { recursive: true });
fs.appendFileSync(FEEDBACK_FILE, JSON.stringify(entry) + "\n", "utf-8");
} catch (err) {
logger.error({ err }, "Failed to persist feedback; rejecting");
return null;
}
applyEntry(entry);
if (entry.rating === "up" && entry.answer) {
try { ingestUpvotedAnswer(entry.answer); } catch (err) {
logger.warn({ err }, "guide ingest failed");
}
}
return entry;
}
export function getSourceMultiplier(
source: string,
queryTerms: string[] = [],
): number {
const s = sourceScore.get(source);
let mul = 1.0;
if (s) {
const total = s.up + s.down;
if (total > 0) {
const raw = (s.up - s.down) / Math.max(total, 4);
mul = 1.0 + 0.4 * raw;
}
}
const normTerms = queryTerms
.flatMap((t) => tokenize(String(t)))
.slice(0, 20);
let affinity = 0;
for (const t of normTerms) {
const m = queryTermAffinity.get(t);
if (m) affinity += m.get(source) ?? 0;
}
if (affinity !== 0) {
mul += Math.tanh(affinity / 5) * 0.2;
}
return Math.max(0.5, Math.min(1.6, mul));
}
export function getStats() {
const sources = Array.from(sourceScore.entries())
.map(([name, s]) => ({
source: name,
up: s.up,
down: s.down,
multiplier: Number(getSourceMultiplier(name).toFixed(3)),
}))
.sort((a, b) => b.up - b.down - (a.up - a.down));
return {
totalFeedback: totalUp + totalDown,
totalUp,
totalDown,
sources,
};
}
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