更新

server/app/adminapi/logic/tcm/DiagnosisAiLogic.php

@@ -18,6 +18,9 @@ use think\facade\Log;
  */
 class DiagnosisAiLogic extends BaseLogic
 {
+    /** @var string Safe machine-readable code for the current assistant request. */
+    private static $assistantErrorCode = 'AI_ASSISTANT_FAILED';
+
     private const PROMPT_VERSION = 'patient-context-case-explain-v2';
 
     private const ASSISTANT_PROMPT_VERSION = 'patient-context-assistant-v2';
@@ -354,6 +357,7 @@ class DiagnosisAiLogic extends BaseLogic
         int $adminId,
         array $adminInfo
     ): ?array {
+        self::$assistantErrorCode = 'AI_ASSISTANT_FAILED';
         $diagnosis = self::loadAuthorizedDiagnosis(
             $diagnosisId,
             $adminId,
@@ -433,6 +437,14 @@ class DiagnosisAiLogic extends BaseLogic
         $diagnosisId = (int) ($prepared['diagnosis_id'] ?? 0);
         $profile = (string) ($prepared['profile'] ?? '');
         $adminId = (int) ($prepared['admin_id'] ?? 0);
+        $deliveredDelta = false;
+        $forwardDelta = static function (string $delta) use (&$deliveredDelta, $onDelta) {
+            $accepted = $onDelta($delta);
+            if ($accepted !== false) {
+                $deliveredDelta = true;
+            }
+            return $accepted;
+        };
 
         try {
             $result = DifyChatService::streamChat(
@@ -440,7 +452,7 @@ class DiagnosisAiLogic extends BaseLogic
                 is_array($prepared['inputs'] ?? null) ? $prepared['inputs'] : [],
                 (string) ($prepared['query'] ?? ''),
                 (string) ($prepared['user'] ?? ''),
-                $onDelta,
+                $forwardDelta,
                 $shouldAbort,
                 is_array($prepared['files'] ?? null) ? $prepared['files'] : []
             );
@@ -452,6 +464,7 @@ class DiagnosisAiLogic extends BaseLogic
                 $e,
                 (string) ($prepared['task'] ?? '')
             );
+            self::$assistantErrorCode = 'UPSTREAM_UNAVAILABLE';
             self::setError('AI 助手暂时不可用，请稍后重试');
             return null;
         }
@@ -464,6 +477,47 @@ class DiagnosisAiLogic extends BaseLogic
                 (string) ($prepared['task'] ?? ''),
                 is_array($result) ? $result : []
             );
+
+            // Some Dify-compatible gateways accept blocking chat but reject or
+            // incompletely terminate streaming responses.  Before any delta has
+            // reached the doctor it is safe to make one blocking compatibility
+            // attempt; after a delta, retrying could duplicate clinical text.
+            $streamErrorCode = strtoupper(trim((string) ($result['error_code'] ?? '')));
+            if (
+                !$deliveredDelta
+                && in_array(
+                    $streamErrorCode,
+                    ['UPSTREAM_REJECTED', 'INCOMPLETE_RESPONSE', 'EMPTY_RESPONSE'],
+                    true
+                )
+            ) {
+                try {
+                    $result = DifyChatService::chat(
+                        $profile,
+                        is_array($prepared['inputs'] ?? null) ? $prepared['inputs'] : [],
+                        (string) ($prepared['query'] ?? ''),
+                        (string) ($prepared['user'] ?? ''),
+                        is_array($prepared['files'] ?? null) ? $prepared['files'] : []
+                    );
+                } catch (\Throwable $e) {
+                    self::logAssistantFailure(
+                        $diagnosisId,
+                        $profile,
+                        $adminId,
+                        $e,
+                        (string) ($prepared['task'] ?? '')
+                    );
+                }
+                if (empty($result['ok'])) {
+                    self::logAssistantUpstreamError(
+                        $diagnosisId,
+                        $profile,
+                        $adminId,
+                        (string) ($prepared['task'] ?? ''),
+                        is_array($result) ? $result : []
+                    );
+                }
+            }
         }
 
         return self::formatAssistantResult($prepared, $result);
@@ -480,6 +534,7 @@ class DiagnosisAiLogic extends BaseLogic
             // 附带上游错误码，让医生反馈时管理员能直接定位是配置、体积还是上游拒绝。
             $message = (string) ($result['error'] ?? 'AI 助手暂时不可用，请稍后重试');
             $errorCode = trim((string) ($result['error_code'] ?? ''));
+            self::$assistantErrorCode = self::normaliseAssistantErrorCode($errorCode);
             if ($errorCode !== '') {
                 $message .= '（' . $errorCode . '）';
             }
@@ -488,6 +543,7 @@ class DiagnosisAiLogic extends BaseLogic
         }
         $content = self::cleanText($result['content'] ?? '', self::MAX_REPORT_LENGTH, true);
         if ($content === '') {
+            self::$assistantErrorCode = 'EMPTY_RESPONSE';
             self::setError('AI 助手未返回内容，请重试');
             return null;
         }
@@ -520,6 +576,20 @@ class DiagnosisAiLogic extends BaseLogic
         return $payload;
     }
 
+    /** Return a safe code for the current SSE terminal error event. */
+    public static function getAssistantErrorCode(): string
+    {
+        return self::normaliseAssistantErrorCode(self::$assistantErrorCode);
+    }
+
+    private static function normaliseAssistantErrorCode(string $code): string
+    {
+        $code = strtoupper(trim($code));
+        return preg_match('/^[A-Z][A-Z0-9_]{2,63}$/', $code) === 1
+            ? $code
+            : 'AI_ASSISTANT_FAILED';
+    }
+
     /** @return array<string,mixed>|null */
     private static function parsePrescriptionDraft(string $content): ?array
     {