initial push from external dev branches

server/dist/sources/core/metrics.js

@@ -0,0 +1,35 @@
+// In-memory counters, one set PER SOURCE. Surfaced via /api/sources/:id/status and /health-style
+// reporting. Ported from d-combine/lib/core/metrics.mjs.
+export function createMetrics() {
+    return {
+        startedAt: Date.now(),
+        requests: { total: 0, master: 0, variant: 0, segment: 0, other: 0, errors: 0 },
+        upstream: { ok: 0, notLive: 0, forbidden: 0, failed: 0 }, // 404=notLive, 403=forbidden(gate)
+        bytesStreamed: 0,
+        active: 0,
+        lastStreamAt: null,
+        lastError: null,
+    };
+}
+/** Human-readable byte size. */
+export function fmtBytes(n) {
+    if (n < 1024)
+        return `${n}B`;
+    if (n < 1048576)
+        return `${(n / 1024).toFixed(1)}KB`;
+    return `${(n / 1048576).toFixed(2)}MB`;
+}
+/** JSON snapshot of one source's metrics. */
+export function snapshotOne(m) {
+    return {
+        uptimeSeconds: Math.round((Date.now() - m.startedAt) / 1000),
+        active: m.active,
+        requests: { ...m.requests },
+        upstream: { ...m.upstream },
+        bytesStreamed: m.bytesStreamed,
+        mbStreamed: +(m.bytesStreamed / 1048576).toFixed(2),
+        lastStreamAt: m.lastStreamAt ? new Date(m.lastStreamAt).toISOString() : null,
+        lastError: m.lastError,
+    };
+}
+//# sourceMappingURL=metrics.js.map