1  """
 2  Enumerations used throughout the application.
 3  """
 4  
 5  from enum import Enum
 6  
 7  
 8  class SenderType(str, Enum):
 9      """Types of message senders."""
10      USER = "user"
11      AGENT = "agent"
12      SYSTEM = "system"
13  
14  
15  class TaskStatus(str, Enum):
16      """Task execution status."""
17      PENDING = "pending"
18      RUNNING = "running"
19      COMPLETED = "completed"
20      FAILED = "failed"
21      CANCELLED = "cancelled"
22  
23  
24  
25  
26  class MessageType(str, Enum):
27      """Types of messages."""
28      TEXT = "text"
29      FILE = "file"
30      IMAGE = "image"
31      DOCUMENT = "document"
32  
33  
34  class ValidationErrorType(str, Enum):
35      """Types of validation errors."""
36      REQUIRED_FIELD = "required_field"
37      INVALID_FORMAT = "invalid_format"
38      OUT_OF_RANGE = "out_of_range"
39      DUPLICATE_VALUE = "duplicate_value"
40      BUSINESS_RULE = "business_rule"