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// mcp-server/src/server_prompts.rs
use anyhow::{anyhow, Result};
use serde_json::json;
use std::sync::atomic::Ordering;
use mcp_protocol::{
constants::error_codes,
messages::JsonRpcMessage,
types::prompt::{PromptGetParams, PromptsListParams},
types::ServerState,
};
use crate::server::Server;
impl Server {
/// Handle prompts/list request
pub(crate) async fn handle_prompts_list(&self, message: JsonRpcMessage) -> Result<()> {
match message {
JsonRpcMessage::Request { id, params, .. } => {
// Check if server is ready
if self.state().load(Ordering::SeqCst) != ServerState::Ready as u8 {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::SERVER_NOT_INITIALIZED,
"Server not initialized",
None,
))
.await?;
return Ok(());
}
// Parse parameters (optional)
let params: Option<PromptsListParams> = match params {
Some(params) => match serde_json::from_value(params) {
Ok(params) => Some(params),
Err(err) => {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::INVALID_PARAMS,
&format!("Invalid prompt list parameters: {}", err),
None,
))
.await?;
return Ok(());
}
},
None => None,
};
// Get cursor from parameters
let cursor = params.and_then(|p| p.cursor);
// Get prompts from manager with pagination
let (prompts, next_cursor) = self.prompt_manager().list_prompts(cursor).await;
// Send response
self.transport()
.send(JsonRpcMessage::response(
id,
json!({
"prompts": prompts,
"nextCursor": next_cursor.unwrap_or_default()
}),
))
.await?;
Ok(())
}
_ => Err(anyhow!("Expected request message for prompts/list")),
}
}
/// Handle prompts/get request
pub(crate) async fn handle_prompts_get(&self, message: JsonRpcMessage) -> Result<()> {
match message {
JsonRpcMessage::Request { id, params, .. } => {
// Check if server is ready
if self.state().load(Ordering::SeqCst) != ServerState::Ready as u8 {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::SERVER_NOT_INITIALIZED,
"Server not initialized",
None,
))
.await?;
return Ok(());
}
// Parse parameters
let params: PromptGetParams = match params {
Some(params) => match serde_json::from_value(params) {
Ok(params) => params,
Err(err) => {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::INVALID_PARAMS,
&format!("Invalid prompt get parameters: {}", err),
None,
))
.await?;
return Ok(());
}
},
None => {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::INVALID_PARAMS,
"Missing prompt get parameters",
None,
))
.await?;
return Ok(());
}
};
// Get prompt content
match self.prompt_manager().get_prompt(¶ms.name, params.arguments).await {
Ok(result) => {
// Send response
self.transport()
.send(JsonRpcMessage::response(
id,
json!(result),
))
.await?;
}
Err(err) => {
// Send error response
self.transport()
.send(JsonRpcMessage::error(
id,
error_codes::INVALID_PARAMS,
&format!("Prompt error: {}", err),
Some(json!({
"name": params.name
})),
))
.await?;
}
}
Ok(())
}
_ => Err(anyhow!("Expected request message for prompts/get")),
}
}
}