optimize technical truth

src/Controller/AskSseController.php

@@ -16,6 +16,7 @@ use Symfony\Component\Routing\Annotation\Route;
 final readonly class AskSseController
 {
     private const JOB_TTL_SECONDS = 900;
+    private const JOB_RUNNING_STALE_SECONDS = 120;
 
     private const JOB_STATUS_PENDING = 'pending';
     private const JOB_STATUS_RUNNING = 'running';
@@ -98,12 +99,18 @@ final readonly class AskSseController
             ], Response::HTTP_NOT_FOUND);
         }
 
+        $job = $this->markRunningJobFailedIfStale($jobId, $job) ?? $job;
+        $now = time();
+
         return new JsonResponse([
             'status' => (string) ($job['status'] ?? ''),
             'message' => is_string($job['message'] ?? null) ? (string) $job['message'] : '',
             'lastEventId' => max(0, (int) ($job['lastEventId'] ?? 0)),
             'updatedAt' => max(0, (int) ($job['updatedAt'] ?? 0)),
+            'startedAt' => max(0, (int) ($job['startedAt'] ?? 0)),
             'completedAt' => max(0, (int) ($job['completedAt'] ?? 0)),
+            'serverTime' => $now,
+            'runningStaleAfterSeconds' => self::JOB_RUNNING_STALE_SECONDS,
         ]);
     }
 
@@ -487,6 +494,15 @@ final readonly class AskSseController
                     ];
                 }
 
+                $currentStatus = (string) ($data['status'] ?? '');
+
+                if (in_array($currentStatus, [self::JOB_STATUS_COMPLETED, self::JOB_STATUS_FAILED, self::JOB_STATUS_INTERRUPTED], true) && $currentStatus !== $status) {
+                    return [
+                        'persist' => false,
+                        'result' => ['ok' => false, 'reason' => 'terminal_status'],
+                    ];
+                }
+
                 $data['status'] = $status;
                 $data['updatedAt'] = time();
 
@@ -629,6 +645,7 @@ final readonly class AskSseController
             }
 
             $job = $this->readJob($jobId);
+            $job = is_array($job) ? ($this->markRunningJobFailedIfStale($jobId, $job) ?? $job) : null;
             $status = is_array($job) ? (string) ($job['status'] ?? '') : '';
             $message = is_array($job) && is_string($job['message'] ?? null)
                 ? trim((string) $job['message'])
@@ -739,6 +756,13 @@ final readonly class AskSseController
                     ];
                 }
 
+                if ((string) ($job['status'] ?? '') !== self::JOB_STATUS_RUNNING) {
+                    return [
+                        'persist' => false,
+                        'result' => ['ok' => false, 'reason' => 'job_not_running'],
+                    ];
+                }
+
                 $eventId = max(0, (int) ($job['lastEventId'] ?? 0)) + 1;
                 $job['lastEventId'] = $eventId;
                 $job['updatedAt'] = time();
@@ -809,6 +833,35 @@ final readonly class AskSseController
         return is_array($decoded) ? $decoded : null;
     }
 
+    /**
+     * @param array<string, mixed> $job
+     *
+     * @return array<string, mixed>|null
+     */
+    private function markRunningJobFailedIfStale(string $jobId, array $job): ?array
+    {
+        if ((string) ($job['status'] ?? '') !== self::JOB_STATUS_RUNNING) {
+            return $job;
+        }
+
+        $lastProgressAt = max(
+            (int) ($job['updatedAt'] ?? 0),
+            (int) ($job['startedAt'] ?? 0),
+            (int) ($job['createdAt'] ?? 0)
+        );
+
+        if ($lastProgressAt <= 0 || time() - $lastProgressAt <= self::JOB_RUNNING_STALE_SECONDS) {
+            return $job;
+        }
+
+        $message = 'Der Antwort-Job liefert seit längerer Zeit keine neuen Daten. Der Stream wurde beendet, damit die Oberfläche nicht hängen bleibt.';
+        $this->markJobStatus($jobId, self::JOB_STATUS_FAILED, $message);
+
+        $freshJob = $this->readJob($jobId);
+
+        return is_array($freshJob) ? $freshJob : $job;
+    }
+
     /**
      * @param array<string, mixed> $claim
      */

src/Infrastructure/OllamaClient.php

@@ -13,6 +13,9 @@ use Throwable;
 
 final class OllamaClient
 {
+    private const CONNECT_TIMEOUT_SECONDS = 10;
+    private const LOW_SPEED_LIMIT_BYTES = 1;
+    private const LOW_SPEED_TIME_SECONDS = 45;
     private ?ModelGenerationConfig $cachedConfig = null;
     private $config = null;
 
@@ -66,7 +69,10 @@ final class OllamaClient
             CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
             CURLOPT_POSTFIELDS => $payload,
             CURLOPT_RETURNTRANSFER => false,
-            CURLOPT_TIMEOUT => $this->timeoutSeconds,
+            CURLOPT_TIMEOUT => $this->requestTimeoutSeconds(),
+            CURLOPT_CONNECTTIMEOUT => self::CONNECT_TIMEOUT_SECONDS,
+            CURLOPT_LOW_SPEED_LIMIT => self::LOW_SPEED_LIMIT_BYTES,
+            CURLOPT_LOW_SPEED_TIME => self::LOW_SPEED_TIME_SECONDS,
             CURLOPT_WRITEFUNCTION => function ($curl, string $data) use (&$buffer): int {
                 $buffer .= $data;
                 return strlen($data);
@@ -144,7 +150,10 @@ final class OllamaClient
             CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
             CURLOPT_POSTFIELDS => $payload,
             CURLOPT_RETURNTRANSFER => true,
-            CURLOPT_TIMEOUT => $this->timeoutSeconds,
+            CURLOPT_TIMEOUT => $this->requestTimeoutSeconds(),
+            CURLOPT_CONNECTTIMEOUT => self::CONNECT_TIMEOUT_SECONDS,
+            CURLOPT_LOW_SPEED_LIMIT => self::LOW_SPEED_LIMIT_BYTES,
+            CURLOPT_LOW_SPEED_TIME => self::LOW_SPEED_TIME_SECONDS,
         ]);
 
         $response = curl_exec($ch);
@@ -188,6 +197,13 @@ final class OllamaClient
         ];
     }
 
+    private function requestTimeoutSeconds(): int
+    {
+        $timeout = (int) $this->timeoutSeconds;
+
+        return $timeout > 0 ? $timeout : 300;
+    }
+
     /**
      * Config caching per request
      */