Merge pull request #1303 from PicPeak/fix/1300-remove-fragmentation

fix: remove the image-fragmentation surface

backend/src/services/secureImageService.js

@@ -175,8 +175,7 @@ class SecureImageService {
       quality = 85,
       maxWidth = 1920,
       maxHeight = 1080,
-      addFingerprint = true,
-      fragmentImage = false
+      addFingerprint = true
     } = options;
 
     try {
@@ -187,7 +186,7 @@ class SecureImageService {
 
       // For standard protection without fingerprinting, return original file
       // This avoids unnecessary recompression when no protection features are needed
-      if (protectionLevel === 'standard' && !addFingerprint && !fragmentImage) {
+      if (protectionLevel === 'standard' && !addFingerprint) {
         return await fs.readFile(imagePath);
       }
 
@@ -268,14 +267,7 @@ class SecureImageService {
         });
       }
 
-      const buffer = await image.toBuffer();
-
-      // Fragment image if requested (for canvas reconstruction)
-      if (fragmentImage && protectionLevel === 'maximum') {
-        return await this.fragmentImageBuffer(buffer, metadata);
-      }
-
-      return buffer;
+      return await image.toBuffer();
     } catch (error) {
       logger.error('Error processing protected image:', error);
       // Return original on error
@@ -283,51 +275,6 @@ class SecureImageService {
     }
   }
 
-  /**
-   * Fragment image into multiple pieces for canvas reconstruction
-   */
-  async fragmentImageBuffer(buffer, metadata) {
-    const { width, height } = metadata;
-    const fragments = [];
-    
-    // Create 3x3 grid of fragments
-    const cols = 3;
-    const rows = 3;
-    const fragmentWidth = Math.floor(width / cols);
-    const fragmentHeight = Math.floor(height / rows);
-
-    for (let row = 0; row < rows; row++) {
-      for (let col = 0; col < cols; col++) {
-        const left = col * fragmentWidth;
-        const top = row * fragmentHeight;
-        
-        const fragment = await sharp(buffer)
-          .extract({ 
-            left, 
-            top, 
-            width: fragmentWidth, 
-            height: fragmentHeight 
-          })
-          .toBuffer();
-          
-        fragments.push({
-          index: row * cols + col,
-          row,
-          col,
-          buffer: fragment,
-          position: { left, top, width: fragmentWidth, height: fragmentHeight }
-        });
-      }
-    }
-
-    return {
-      type: 'fragmented',
-      fragments,
-      originalDimensions: { width, height },
-      fragmentDimensions: { width: fragmentWidth, height: fragmentHeight, cols, rows }
-    };
-  }
-
   /**
    * Log image access for security monitoring
    */