Initial commit: Document Translation API with Excel, Word, PowerPoint support

utils/exceptions.py

@@ -0,0 +1,51 @@
+"""
+Custom exceptions for the Document Translation API
+"""
+from fastapi import HTTPException
+
+
+class TranslationError(Exception):
+    """Base exception for translation errors"""
+    pass
+
+
+class UnsupportedFileTypeError(TranslationError):
+    """Raised when an unsupported file type is provided"""
+    pass
+
+
+class FileSizeLimitExceededError(TranslationError):
+    """Raised when a file exceeds the size limit"""
+    pass
+
+
+class LanguageNotSupportedError(TranslationError):
+    """Raised when a language code is not supported"""
+    pass
+
+
+class DocumentProcessingError(TranslationError):
+    """Raised when there's an error processing the document"""
+    pass
+
+
+def handle_translation_error(error: Exception) -> HTTPException:
+    """
+    Convert translation errors to HTTP exceptions
+    
+    Args:
+        error: Exception that occurred
+    
+    Returns:
+        HTTPException with appropriate status code and message
+    """
+    if isinstance(error, UnsupportedFileTypeError):
+        return HTTPException(status_code=400, detail=str(error))
+    elif isinstance(error, FileSizeLimitExceededError):
+        return HTTPException(status_code=413, detail=str(error))
+    elif isinstance(error, LanguageNotSupportedError):
+        return HTTPException(status_code=400, detail=str(error))
+    elif isinstance(error, DocumentProcessingError):
+        return HTTPException(status_code=500, detail=str(error))
+    else:
+        return HTTPException(status_code=500, detail="An unexpected error occurred during translation")