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@@ -0,0 +1,97 @@
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+<?php
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+// Long-poll endpoint. Holds the connection open for up to ~28 seconds until
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+// either (a) the job_history or messages tables receive a row beyond the
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+// caller's since markers, or (b) it times out. Either way returns the current
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+// max IDs so the client can update its trackers.
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+//
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+// One PHP-FPM worker is parked per connected client while this runs. For 2-3
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+// users that's fine; if more users start using this app, raise pm.max_children.
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+
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+require_once __DIR__ . '/../lib/identity.php';
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+
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+[$actor, $vendor_id] = resolve_request_actor();
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+
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+$since_h = (int) ($_GET['since_h'] ?? 0);
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+
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+// Messages "since" markers.
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+// Vendor caller: a single int (their own vendor's last seen message id).
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+// ICG caller: "vid:id,vid:id" pairs (one per vendor thread on PDQ.php).
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+$since_m = [];
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+if ($actor === 'ICG') {
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+ foreach (array_filter(explode(',', (string) ($_GET['since_m'] ?? ''))) as $pair) {
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+ $p = explode(':', $pair);
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+ if (count($p) === 2) $since_m[(int) $p[0]] = (int) $p[1];
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+ }
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+} else {
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+ $since_m[$vendor_id] = (int) ($_GET['since_m'] ?? 0);
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+}
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+
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+// PHP's default max_execution_time is 30s; give ourselves slightly more so the
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+// loop can finish writing the response before the deadline.
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+@set_time_limit(45);
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+
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+$pdo = db();
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+$vfilter = $actor === 'ICG' ? null : $vendor_id;
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+$deadline = microtime(true) + 28.0;
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+
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+header('Content-Type: application/json');
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+
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+while (true) {
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+ [$cur_h, $cur_m] = events_snapshot($pdo, $vfilter);
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+
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+ $history_changed = $cur_h > $since_h;
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+ $changed_vendors = [];
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+ foreach ($cur_m as $vid => $maxid) {
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+ if ($maxid > ($since_m[$vid] ?? 0)) $changed_vendors[] = $vid;
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+ }
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+
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+ if ($history_changed || $changed_vendors) {
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+ echo json_encode([
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+ 'history' => $cur_h,
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+ 'messages' => $cur_m,
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+ 'history_changed' => $history_changed,
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+ 'changed_vendors' => $changed_vendors,
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+ ]);
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+ return;
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+ }
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+ if (microtime(true) >= $deadline) {
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+ echo json_encode([
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+ 'history' => $cur_h,
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+ 'messages' => $cur_m,
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+ 'timeout' => true,
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+ ]);
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+ return;
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+ }
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+ // Bail early if the client has gone away (cheap check — flush updates the
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+ // connection state). Otherwise sleep 1s and loop.
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+ if (connection_aborted()) return;
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+ usleep(1000000);
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+}
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+
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+function events_snapshot(PDO $pdo, ?int $vendor_filter): array {
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+ if ($vendor_filter === null) {
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+ $h = (int) $pdo->query('SELECT COALESCE(MAX(id), 0) FROM job_history')->fetchColumn();
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+ $m = [];
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+ foreach ($pdo->query('SELECT vendor_id, COALESCE(MAX(id), 0) AS maxid FROM messages GROUP BY vendor_id')->fetchAll() as $r) {
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+ $m[(int) $r['vendor_id']] = (int) $r['maxid'];
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+ }
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+ // Vendors with zero messages get a 0 entry so the client tracks them.
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+ foreach ($pdo->query('SELECT id FROM vendors WHERE active = 1')->fetchAll() as $v) {
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+ if (!isset($m[(int) $v['id']])) $m[(int) $v['id']] = 0;
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+ }
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+ } else {
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+ $stmt = $pdo->prepare(
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+ 'SELECT COALESCE(MAX(h.id), 0)
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+ FROM job_history h
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+ JOIN jobs j ON j.id = h.job_id
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+ WHERE j.vendor_id = ?'
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+ );
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+ $stmt->execute([$vendor_filter]);
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+ $h = (int) $stmt->fetchColumn();
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+
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+ $stmt = $pdo->prepare('SELECT COALESCE(MAX(id), 0) FROM messages WHERE vendor_id = ?');
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+ $stmt->execute([$vendor_filter]);
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+ $m = [$vendor_filter => (int) $stmt->fetchColumn()];
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+ }
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+ return [$h, $m];
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+}
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