fix: add sanitizePostgresText to filter null bytes and malformed Unicode escape sequences before inserting template text into Supabase

src/controllers/document.controller.ts

@@ -397,6 +397,20 @@ export const ocrImage = async (req: AuthenticatedRequest, res: Response) => {
   }
 };
 
+/**
+ * PostgreSQL ve Supabase JSON/Text alanlarının reddettiği null byte (\u0000), 
+ * bozuk unicode kaçış dizileri ve kontrol karakterlerini temizler.
+ */
+export function sanitizePostgresText(text: string | null | undefined): string {
+  if (!text) return '';
+  return String(text)
+    .replace(/\0/g, '')
+    .replace(/\\u0000/gi, '')
+    .replace(/[\u0000-\u0008\u000B\u000C\u000E-\u001F]/g, '')
+    .replace(/[\uD800-\uDFFF]/g, '')
+    .replace(/\uFFFD/g, '');
+}
+
 // uploadDocument ve uploadTemplate'in (template.controller.ts) ortak kullandığı
 // metin çıkarma adımı: resimler için Tesseract OCR, ofis belgeleri için officeParser.
 export async function extractTextFromUploadedFile(file: { buffer: Buffer; mimetype: string; originalname: string }): Promise<string> {
@@ -444,7 +458,7 @@ export async function extractTextFromUploadedFile(file: { buffer: Buffer; mimety
               .replace(/\s+/g, " ")
               .trim();
             if (plainText.length > 20) {
-              return plainText;
+              return sanitizePostgresText(plainText);
             }
           }
         }
@@ -455,7 +469,7 @@ export async function extractTextFromUploadedFile(file: { buffer: Buffer; mimety
           const pdfResult: any = await officeParser.parseOffice(pdfBuffer);
           const pdfText = typeof pdfResult === 'string' ? pdfResult : (pdfResult?.toText ? pdfResult.toText() : String(pdfResult || ''));
           if (pdfText && pdfText.trim()) {
-            return pdfText.trim();
+            return sanitizePostgresText(pdfText.trim());
           }
         }
       }
@@ -464,8 +478,9 @@ export async function extractTextFromUploadedFile(file: { buffer: Buffer; mimety
       const rawText = file.buffer.toString('utf8');
       if (rawText && rawText.trim().length > 20) {
         const plainText = rawText.replace(/<[^>]+>/g, " ").replace(/\s+/g, " ").trim();
-        if (plainText.length > 20) {
-          return plainText;
+        const cleaned = sanitizePostgresText(plainText);
+        if (cleaned.length > 20) {
+          return cleaned;
         }
       }
 
@@ -482,14 +497,15 @@ export async function extractTextFromUploadedFile(file: { buffer: Buffer; mimety
       imageBuffer = await heicConvert({ buffer: file.buffer, format: 'JPEG', quality: 1 });
     }
     const { data: { text } } = await Tesseract.recognize(imageBuffer, 'tur');
-    return text;
+    return sanitizePostgresText(text);
   }
 
   // officeParser natively supports pdf, docx, doc, rtf, txt, etc.
   // officeparser@7.x parseOffice() bir sonuc objesi donduruyor (duz string degil),
   // duz metin icin .toText() cagirmak gerekiyor.
   const result: any = await officeParser.parseOffice(file.buffer);
-  return typeof result === 'string' ? result : (result?.toText ? result.toText() : String(result || ''));
+  const rawResult = typeof result === 'string' ? result : (result?.toText ? result.toText() : String(result || ''));
+  return sanitizePostgresText(rawResult);
 }
 
 // Sohbet ekranlarındaki (genel Sohbet ve dosya bazlı "AyrisLegal'e Sor") ataç