use crate::events::AgentEvent;
use crate::events::ToolEvent;
use llm::{ToolCallError, ToolCallRequest, ToolCallResult};
use serde::Serialize;
pub fn agent_event(message_id: &str) -> AgentEventBuilder {
AgentEventBuilder::new(message_id)
}
pub struct AgentEventBuilder {
message_id: String,
chunks: Vec<AgentEvent>,
full_text: String,
}
impl AgentEventBuilder {
pub fn new(message_id: &str) -> Self {
Self { message_id: message_id.to_string(), chunks: Vec::new(), full_text: String::new() }
}
pub fn text(mut self, chunks: &[&str]) -> Self {
for chunk in chunks {
self.chunks.push(AgentEvent::text(&self.message_id, chunk, false));
self.full_text.push_str(chunk);
}
self
}
pub fn tool_call<T: Serialize, U: Serialize>(
mut self,
tool_call_id: &str,
name: &str,
request: &T,
result: &U,
) -> Self {
let request_json = serde_json::to_string(request).expect("Failed to serialize request");
let result_value = serde_json::to_value(result).expect("Failed to serialize result");
let result_yaml = serde_yml::to_string(&result_value).unwrap_or_else(|_| result_value.to_string());
self.push_tool_call_start(tool_call_id, name);
self.push_tool_call_chunk(tool_call_id, &request_json);
self.chunks.push(AgentEvent::Tool(ToolEvent::Result {
result: ToolCallResult {
id: tool_call_id.to_string(),
name: name.to_string(),
arguments: request_json,
result: result_yaml,
},
result_meta: None,
}));
self
}
pub fn tool_call_with_error<T: Serialize>(
mut self,
tool_call_id: &str,
name: &str,
request: &T,
error_message: &str,
) -> Self {
let request_json = serde_json::to_string(request).expect("Failed to serialize request");
let error_result = format!(
"Tool execution error: Annotated {{ raw: Text(RawTextContent {{ text: \"{error_message}\", meta: None }}), annotations: None }}"
);
self.push_tool_call_start(tool_call_id, name);
self.push_tool_call_chunk(tool_call_id, &request_json);
self.chunks.push(AgentEvent::Tool(ToolEvent::Error {
error: ToolCallError {
id: tool_call_id.to_string(),
name: name.to_string(),
arguments: Some(request_json),
error: error_result,
},
}));
self
}
pub fn build(mut self) -> Vec<AgentEvent> {
self.chunks.push(AgentEvent::text(&self.message_id, &self.full_text, true));
self.chunks
}
fn push_tool_call_start(&mut self, tool_call_id: &str, name: &str) {
self.chunks.push(AgentEvent::Tool(ToolEvent::Call {
request: ToolCallRequest { id: tool_call_id.to_string(), name: name.to_string(), arguments: String::new() },
}));
}
fn push_tool_call_chunk(&mut self, tool_call_id: &str, chunk: &str) {
self.chunks.push(AgentEvent::Tool(ToolEvent::CallUpdate {
tool_call_id: tool_call_id.to_string(),
chunk: chunk.to_string(),
}));
}
}