Makelore 2.0 initial clean snapshot
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110
src/lib/telemetry.ts
Normal file
110
src/lib/telemetry.ts
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type TelemetryPayload = Record<string, unknown>;
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export type UiTelemetryEntry = {
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id: number;
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event: string;
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payload: TelemetryPayload;
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count: number;
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ts: string;
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};
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const counters = new Map<string, number>();
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const history: UiTelemetryEntry[] = [];
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const listeners = new Set<(entry: UiTelemetryEntry) => void>();
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let nextEntryId = 1;
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const MAX_HISTORY = 500;
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function safeStringify(payload: TelemetryPayload): string {
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try {
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return JSON.stringify(payload);
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} catch {
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return '{}';
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}
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}
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export function trackUiEvent(event: string, payload: TelemetryPayload = {}): void {
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const count = (counters.get(event) ?? 0) + 1;
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counters.set(event, count);
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const normalizedPayload = {
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...payload,
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};
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const ts = new Date().toISOString();
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const entry: UiTelemetryEntry = {
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id: nextEntryId,
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event,
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payload: normalizedPayload,
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count,
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ts,
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};
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nextEntryId += 1;
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history.push(entry);
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if (history.length > MAX_HISTORY) {
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history.splice(0, history.length - MAX_HISTORY);
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}
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listeners.forEach((listener) => listener(entry));
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const logPayload = {
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...normalizedPayload,
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count,
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ts,
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};
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// Local-only telemetry for UX diagnostics.
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console.info(`[ui-metric] ${event} ${safeStringify(logPayload)}`);
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}
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export function getUiCounter(event: string): number {
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return counters.get(event) ?? 0;
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}
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export function trackUiTiming(
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event: string,
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durationMs: number,
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payload: TelemetryPayload = {},
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): void {
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trackUiEvent(event, {
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...payload,
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durationMs: Math.round(durationMs),
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});
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}
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export function startUiTiming(
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event: string,
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payload: TelemetryPayload = {},
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): (nextPayload?: TelemetryPayload) => number {
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const start = typeof performance !== 'undefined' && typeof performance.now === 'function'
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? performance.now()
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: Date.now();
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return (nextPayload: TelemetryPayload = {}): number => {
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const end = typeof performance !== 'undefined' && typeof performance.now === 'function'
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? performance.now()
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: Date.now();
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const durationMs = Math.max(0, end - start);
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trackUiTiming(event, durationMs, { ...payload, ...nextPayload });
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return durationMs;
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};
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}
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export function getUiTelemetrySnapshot(limit = 200): UiTelemetryEntry[] {
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if (!Number.isFinite(limit) || limit <= 0) {
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return [];
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}
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if (limit >= history.length) {
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return [...history];
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}
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return history.slice(-limit);
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}
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export function clearUiTelemetry(): void {
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counters.clear();
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history.length = 0;
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}
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export function subscribeUiTelemetry(listener: (entry: UiTelemetryEntry) => void): () => void {
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listeners.add(listener);
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return () => {
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listeners.delete(listener);
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};
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}
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