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agent_dhal/agentdhal_agentchat/utils/_utils.py

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+from typing import List, Union
+
+from agentdhal_core import FunctionCall, Image
+from agentdhal_core.models import FunctionExecutionResult, LLMMessage, UserMessage
+from pydantic import BaseModel
+
+# Type aliases for convenience
+_StructuredContent = BaseModel
+_UserContent = Union[str, List[Union[str, Image]]]
+_AssistantContent = Union[str, List[FunctionCall]]
+_FunctionExecutionContent = List[FunctionExecutionResult]
+_SystemContent = str
+
+
+def content_to_str(
+    content: _UserContent | _AssistantContent | _FunctionExecutionContent | _SystemContent | _StructuredContent,
+) -> str:
+    """Convert the content of an LLMMessage to a string."""
+    if isinstance(content, str):
+        return content
+    elif isinstance(content, BaseModel):
+        return content.model_dump_json()
+    else:
+        result: List[str] = []
+        for c in content:
+            if isinstance(c, str):
+                result.append(c)
+            elif isinstance(c, Image):
+                result.append("<image>")
+            else:
+                result.append(str(c))
+
+    return "\n".join(result)
+
+
+def remove_images(messages: List[LLMMessage]) -> List[LLMMessage]:
+    """Remove images from a list of LLMMessages"""
+    str_messages: List[LLMMessage] = []
+    for message in messages:
+        if isinstance(message, UserMessage) and isinstance(message.content, list):
+            str_messages.append(UserMessage(content=content_to_str(message.content), source=message.source))
+        else:
+            str_messages.append(message)
+    return str_messages