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app/utils/file_helpers.py

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+def format_file_size(size_bytes):
+    """Format file size in bytes to human-readable format"""
+    if size_bytes < 1024:
+        return f"{size_bytes} bytes"
+    elif size_bytes < 1024 * 1024:
+        return f"{size_bytes / 1024:.2f} KB"
+    elif size_bytes < 1024 * 1024 * 1024:
+        return f"{size_bytes / (1024 * 1024):.2f} MB"
+    else:
+        return f"{size_bytes / (1024 * 1024 * 1024):.2f} GB"
+
+def get_file_icon(mime_type, filename):
+    """Get Font Awesome icon class based on file type"""
+    # Extract extension from filename
+    extension = filename.split('.')[-1].lower() if '.' in filename else ''
+    
+    # Define icon mapping
+    icon_map = {
+        # Documents
+        'pdf': 'fa-file-pdf',
+        'doc': 'fa-file-word',
+        'docx': 'fa-file-word',
+        'txt': 'fa-file-alt',
+        'rtf': 'fa-file-alt',
+        'odt': 'fa-file-alt',
+        
+        # Spreadsheets
+        'xls': 'fa-file-excel',
+        'xlsx': 'fa-file-excel',
+        'csv': 'fa-file-csv',
+        
+        # Presentations
+        'ppt': 'fa-file-powerpoint',
+        'pptx': 'fa-file-powerpoint',
+        
+        # Images
+        'jpg': 'fa-file-image',
+        'jpeg': 'fa-file-image',
+        'png': 'fa-file-image',
+        'gif': 'fa-file-image',
+        'svg': 'fa-file-image',
+        'webp': 'fa-file-image',
+        
+        # Audio
+        'mp3': 'fa-file-audio',
+        'wav': 'fa-file-audio',
+        'ogg': 'fa-file-audio',
+        
+        # Video
+        'mp4': 'fa-file-video',
+        'avi': 'fa-file-video',
+        'mov': 'fa-file-video',
+        'wmv': 'fa-file-video',
+        
+        # Archives
+        'zip': 'fa-file-archive',
+        'rar': 'fa-file-archive',
+        '7z': 'fa-file-archive',
+        'tar': 'fa-file-archive',
+        'gz': 'fa-file-archive',
+        
+        # Code
+        'html': 'fa-file-code',
+        'css': 'fa-file-code',
+        'js': 'fa-file-code',
+        'py': 'fa-file-code',
+        'java': 'fa-file-code',
+        'php': 'fa-file-code',
+        'c': 'fa-file-code',
+        'cpp': 'fa-file-code',
+        'h': 'fa-file-code',
+    }
+    
+    # Check if we have an icon for this extension
+    if extension in icon_map:
+        return icon_map[extension]
+    
+    # If not, try to determine from mime type
+    if mime_type:
+        if mime_type.startswith('image/'):
+            return 'fa-file-image'
+        elif mime_type.startswith('audio/'):
+            return 'fa-file-audio'
+        elif mime_type.startswith('video/'):
+            return 'fa-file-video'
+        elif mime_type.startswith('text/'):
+            return 'fa-file-alt'
+        elif 'pdf' in mime_type:
+            return 'fa-file-pdf'
+        elif 'msword' in mime_type or 'document' in mime_type:
+            return 'fa-file-word'
+        elif 'excel' in mime_type or 'spreadsheet' in mime_type:
+            return 'fa-file-excel'
+        elif 'powerpoint' in mime_type or 'presentation' in mime_type:
+            return 'fa-file-powerpoint'
+        elif 'zip' in mime_type or 'compressed' in mime_type or 'archive' in mime_type:
+            return 'fa-file-archive'
+    
+    # Default icon
+    return 'fa-file'