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//! Message command implementations.
use crate::types::common::LettaId;
use crate::types::message::{
CreateMessagesRequest, LettaMessageUnion, ListMessagesRequest, MessageCreate, MessageRole,
};
use crate::LettaClient;
use clap::Parser;
use miette::{Context, IntoDiagnostic};
use std::str::FromStr;
/// Message-related commands.
#[derive(Parser, Debug)]
pub enum MessageCommand {
/// Send a message to an agent
Send {
/// Agent ID to send message to
#[arg(short = 'a', long)]
agent_id: String,
/// Message text to send
message: String,
/// Message role (user, system, assistant)
#[arg(short = 'r', long, default_value = "user")]
role: String,
/// Maximum steps for processing
#[arg(short = 's', long)]
max_steps: Option<i32>,
/// Disable streaming (by default, messages are streamed)
#[arg(long)]
no_stream: bool,
/// Output format (json, pretty, summary)
#[arg(short = 'o', long, default_value = "summary")]
output: String,
},
/// List messages for an agent
List {
/// Agent ID
#[arg(short = 'a', long)]
agent_id: String,
/// Maximum number of messages to return
#[arg(short = 'l', long, default_value = "20")]
limit: i32,
/// Output format (json, pretty, summary)
#[arg(short = 'o', long, default_value = "summary")]
output: String,
},
}
/// Handle message commands.
pub async fn handle(cmd: MessageCommand, client: &crate::LettaClient) -> miette::Result<()> {
match cmd {
MessageCommand::Send {
agent_id,
message,
role,
max_steps,
no_stream,
output,
} => {
send_message(
client, &agent_id, &message, &role, max_steps,
!no_stream, // invert no_stream to get stream
&output,
)
.await
}
MessageCommand::List {
agent_id,
limit,
output,
} => list_messages(client, &agent_id, limit, &output).await,
}
}
async fn send_message(
client: &LettaClient,
agent_id: &str,
message: &str,
role: &str,
max_steps: Option<i32>,
stream: bool,
output: &str,
) -> miette::Result<()> {
// Parse message role
let role = match role.to_lowercase().as_str() {
"user" => MessageRole::User,
"system" => MessageRole::System,
"assistant" => MessageRole::Assistant,
_ => {
eprintln!("Invalid role: {}. Using 'user'.", role);
MessageRole::User
}
};
// Create the message
let message = MessageCreate {
role,
content: message.into(),
..Default::default()
};
// Create the request
let mut request = CreateMessagesRequest {
messages: vec![message],
..Default::default()
};
if let Some(steps) = max_steps {
request.max_steps = Some(steps);
}
let agent_id = LettaId::from_str(agent_id).into_diagnostic()?;
if stream {
// Handle streaming response
use futures::StreamExt;
if output != "json" {
println!("Streaming response from agent...\n");
}
// Use token streaming for better UX when not in JSON mode
let stream_tokens = output != "json";
let mut stream = client
.messages()
.create_stream(&agent_id, request, stream_tokens)
.await?;
while let Some(event) = stream.next().await {
match event {
Ok(crate::StreamingEvent::Message(msg)) => {
match output {
"json" => {
println!("{}", serde_json::to_string(&msg).into_diagnostic()?);
}
_ => {
// Pretty print the message based on type
match msg {
LettaMessageUnion::UserMessage(m) => {
println!("User: {}", m.content);
}
LettaMessageUnion::AssistantMessage(m) => {
println!("Assistant: {}", m.content);
}
LettaMessageUnion::SystemMessage(m) => {
println!("System: {}", m.content);
}
LettaMessageUnion::ToolCallMessage(m) => {
println!(
"Tool Call: {} - {}",
m.tool_call.name, m.tool_call.arguments
);
}
LettaMessageUnion::ToolReturnMessage(m) => {
println!("Tool Result: {}", m.tool_return);
}
_ => {
// For other message types, show the JSON
println!(
"{}",
serde_json::to_string_pretty(&msg).into_diagnostic()?
);
}
}
}
}
}
Ok(crate::StreamingEvent::StopReason(reason)) => {
if output == "json" {
println!("{}", serde_json::to_string(&reason).into_diagnostic()?);
}
}
Ok(crate::StreamingEvent::Usage(usage)) => {
if output == "json" {
println!("{}", serde_json::to_string(&usage).into_diagnostic()?);
} else if output != "summary" {
println!("\nUsage Statistics:");
if let Some(steps) = usage.step_count {
println!(" Steps: {}", steps);
}
if let Some(tokens) = usage.total_tokens {
println!(" Total Tokens: {}", tokens);
}
}
}
Err(e) => return Err(e).wrap_err("Error streaming messages")?,
}
}
} else {
// Handle non-streaming response
if output != "json" {
println!("Sending message to agent...");
}
match client.messages().create(&agent_id, request).await {
Ok(response) => match output {
"json" => {
println!("{}", serde_json::to_string(&response).into_diagnostic()?);
}
"pretty" => {
println!(
"{}",
serde_json::to_string_pretty(&response).into_diagnostic()?
);
}
_ => {
println!("Message sent successfully!\n");
// Display the conversation
for msg in &response.messages {
match msg {
LettaMessageUnion::UserMessage(m) => {
println!("User: {}", m.content);
}
LettaMessageUnion::AssistantMessage(m) => {
println!("Assistant: {}", m.content);
}
LettaMessageUnion::SystemMessage(m) => {
println!("System: {}", m.content);
}
LettaMessageUnion::ToolCallMessage(m) => {
println!(
"Tool Call: {} - {}",
m.tool_call.name, m.tool_call.arguments
);
}
LettaMessageUnion::ToolReturnMessage(m) => {
println!("Tool Result: {}", m.tool_return);
}
_ => {}
}
}
// Show stop reason
println!("\nStop Reason: {:?}", response.stop_reason.stop_reason);
// Show usage if available
println!("\nUsage:");
if let Some(steps) = response.usage.step_count {
println!(" Steps: {}", steps);
}
if let Some(tokens) = response.usage.total_tokens {
println!(" Total Tokens: {}", tokens);
}
}
},
Err(e) => return Err(e).wrap_err("Error sending messages")?,
}
}
Ok(())
}
async fn list_messages(
client: &LettaClient,
agent_id: &str,
limit: i32,
output: &str,
) -> miette::Result<()> {
let agent_id = LettaId::from_str(agent_id).into_diagnostic()?;
let params = ListMessagesRequest {
limit: Some(limit),
..Default::default()
};
match client.messages().list(&agent_id, Some(params)).await {
Ok(messages) => match output {
"json" => {
println!("{}", serde_json::to_string(&messages).into_diagnostic()?);
}
"pretty" => {
println!(
"{}",
serde_json::to_string_pretty(&messages).into_diagnostic()?
);
}
_ => {
if messages.is_empty() {
println!("No messages found.");
} else {
println!("Found {} messages:\n", messages.len());
for msg in messages {
match msg {
LettaMessageUnion::UserMessage(m) => {
println!("User [{}]", m.date);
println!(" {}\n", m.content);
}
LettaMessageUnion::AssistantMessage(m) => {
println!("Assistant [{}]", m.date);
println!(" {}\n", m.content);
}
LettaMessageUnion::SystemMessage(m) => {
println!("System [{}]", m.date);
println!(" {}\n", m.content);
}
LettaMessageUnion::ToolCallMessage(m) => {
println!("Tool Call [{}]", m.date);
println!(" Tool: {}", m.tool_call.name);
println!(" Args: {}\n", m.tool_call.arguments);
}
LettaMessageUnion::ToolReturnMessage(m) => {
println!("Tool Result [{}]", m.date);
println!(" {}\n", m.tool_return);
}
LettaMessageUnion::ReasoningMessage(m) => {
println!("Reasoning [{}]", m.date);
println!(" {}\n", m.reasoning);
}
LettaMessageUnion::HiddenReasoningMessage(m) => {
println!("Hidden Reasoning [{}]", m.date);
println!(" State: {:?}\n", m.state);
}
}
}
}
}
},
Err(e) => return Err(e).wrap_err("Failed to get messages")?,
}
Ok(())
}