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//! /load 命令实现
//!
//! 加载指定会话，包括完整消息历史和项目记忆。
use super::super::backend_context::BackendContext;
use super::super::command_trait::Command;
use crate::{AgentEvent, ContentBlock, EventData, EventType, HistoryMessage, MessageContent, Role};
use std::path::PathBuf;
/// Load 命令
///
/// 用法：
/// - /load <session_id> - 加载指定会话（包括消息历史和记忆）
pub struct Load;
impl Command for Load {
fn name(&self) -> &'static str {
"load"
}
fn help(&self) -> Option<&'static str> {
Some("加载指定会话（包括消息历史和记忆）。用法: /load <session_id>")
}
fn execute<'a>(
&'a self,
ctx: &'a mut BackendContext<'_>,
) -> std::pin::Pin<Box<dyn std::future::Future<Output = bool> + Send + 'a>> {
Box::pin(async move {
let session_id = ctx.message.strip_prefix("/load ").unwrap_or("");
if let Some(mgr) = ctx.session_mgr {
if mgr.resume(session_id).is_ok() {
// Load full message history for display and agent
let full_messages = mgr
.full_messages()
.map(|msgs| msgs.to_vec())
.unwrap_or_default();
if !full_messages.is_empty() {
// Set full messages to agent
ctx.agent.set_messages(full_messages.clone());
// Load memory for this session's project path
let project_path: Option<PathBuf> = mgr
.current_metadata()
.and_then(|m| m.project_path.clone())
.map(PathBuf::from);
if let Some(ref path) = project_path {
// Reload memory storage with session's project path
if let Ok(new_storage) = crate::memory::MemoryStorage::new(Some(path)) {
*ctx.memory_storage = Some(new_storage);
log::info!("Loaded memory for project: {}", path.display());
}
}
// Convert messages to history format for TUI display
// Each message can produce multiple history entries (text + thinking)
let history: Vec<HistoryMessage> = full_messages
.iter()
.filter_map(|m| {
let base_role = match m.role {
Role::User => "user",
Role::Assistant => "assistant",
_ => return None, // Skip system/tool messages
};
match &m.content {
MessageContent::Text(text) => {
Some(vec![HistoryMessage {
role: base_role.to_string(),
content: text.clone(),
is_thinking: false,
}])
}
MessageContent::Blocks(blocks) => {
// Extract text and thinking from blocks
// Thinking blocks become separate messages
let entries: Vec<HistoryMessage> = blocks
.iter()
.filter_map(|b| match b {
ContentBlock::Text { text } => Some(HistoryMessage {
role: base_role.to_string(),
content: text.clone(),
is_thinking: false,
}),
ContentBlock::Thinking { thinking, .. } => {
Some(HistoryMessage {
role: base_role.to_string(),
content: thinking.clone(),
is_thinking: true,
})
}
_ => None,
})
.collect();
if entries.is_empty() {
None
} else {
Some(entries)
}
}
}
})
.flatten()
.collect();
// Send history to TUI for display
if !history.is_empty() {
let _ = ctx
.event_tx
.send(AgentEvent::with_data(
EventType::HistoryLoaded,
EventData::HistoryMessages { messages: history },
))
.await;
}
// Build success message
let msg = match project_path {
Some(path) => format!(
"✓ Session '{}' loaded: {} messages (project: {})",
session_id,
full_messages.len(),
path.display()
),
None => format!(
"✓ Session '{}' loaded: {} messages",
session_id,
full_messages.len()
),
};
let _ = ctx.event_tx.send(AgentEvent::progress(msg, None)).await;
} else {
let _ = ctx
.event_tx
.send(AgentEvent::progress(
format!("⚠️ Session '{}' has no messages", session_id),
None,
))
.await;
}
} else {
let _ = ctx
.event_tx
.send(AgentEvent::progress(
format!("❌ Session '{}' not found", session_id),
None,
))
.await;
}
} else {
let _ = ctx
.event_tx
.send(AgentEvent::progress(
"❌ Session manager not available",
None,
))
.await;
}
false // 不转发给 agent
})
}
}