521 lines
18 KiB
Rust
521 lines
18 KiB
Rust
use std::sync::Arc;
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use anyhow::Result;
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use assistant_tool::ToolWorkingSet;
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use chrono::{DateTime, Utc};
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use collections::HashMap;
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use futures::future::Shared;
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use futures::{FutureExt as _, StreamExt as _};
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use gpui::{AppContext, EventEmitter, ModelContext, SharedString, Task};
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use language_model::{
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LanguageModel, LanguageModelCompletionEvent, LanguageModelRegistry, LanguageModelRequest,
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LanguageModelRequestMessage, LanguageModelToolResult, LanguageModelToolUse,
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LanguageModelToolUseId, MessageContent, Role, StopReason,
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};
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use language_models::provider::cloud::{MaxMonthlySpendReachedError, PaymentRequiredError};
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use serde::{Deserialize, Serialize};
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use util::{post_inc, TryFutureExt as _};
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use uuid::Uuid;
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use crate::context::{attach_context_to_message, Context};
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#[derive(Debug, Clone, Copy)]
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pub enum RequestKind {
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Chat,
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}
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#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Serialize, Deserialize)]
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pub struct ThreadId(Arc<str>);
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impl ThreadId {
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pub fn new() -> Self {
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Self(Uuid::new_v4().to_string().into())
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}
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}
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impl std::fmt::Display for ThreadId {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(f, "{}", self.0)
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}
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}
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#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, Serialize, Deserialize)]
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pub struct MessageId(usize);
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impl MessageId {
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fn post_inc(&mut self) -> Self {
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Self(post_inc(&mut self.0))
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}
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}
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/// A message in a [`Thread`].
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#[derive(Debug, Clone)]
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pub struct Message {
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pub id: MessageId,
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pub role: Role,
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pub text: String,
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}
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/// A thread of conversation with the LLM.
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pub struct Thread {
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id: ThreadId,
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updated_at: DateTime<Utc>,
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summary: Option<SharedString>,
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pending_summary: Task<Option<()>>,
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messages: Vec<Message>,
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next_message_id: MessageId,
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context_by_message: HashMap<MessageId, Vec<Context>>,
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completion_count: usize,
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pending_completions: Vec<PendingCompletion>,
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tools: Arc<ToolWorkingSet>,
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tool_uses_by_message: HashMap<MessageId, Vec<LanguageModelToolUse>>,
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tool_results_by_message: HashMap<MessageId, Vec<LanguageModelToolResult>>,
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pending_tool_uses_by_id: HashMap<LanguageModelToolUseId, PendingToolUse>,
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}
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impl Thread {
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pub fn new(tools: Arc<ToolWorkingSet>, _cx: &mut ModelContext<Self>) -> Self {
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Self {
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id: ThreadId::new(),
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updated_at: Utc::now(),
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summary: None,
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pending_summary: Task::ready(None),
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messages: Vec::new(),
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next_message_id: MessageId(0),
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context_by_message: HashMap::default(),
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completion_count: 0,
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pending_completions: Vec::new(),
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tools,
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tool_uses_by_message: HashMap::default(),
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tool_results_by_message: HashMap::default(),
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pending_tool_uses_by_id: HashMap::default(),
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}
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}
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pub fn id(&self) -> &ThreadId {
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&self.id
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}
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pub fn is_empty(&self) -> bool {
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self.messages.is_empty()
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}
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pub fn updated_at(&self) -> DateTime<Utc> {
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self.updated_at
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}
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pub fn touch_updated_at(&mut self) {
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self.updated_at = Utc::now();
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}
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pub fn summary(&self) -> Option<SharedString> {
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self.summary.clone()
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}
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pub fn set_summary(&mut self, summary: impl Into<SharedString>, cx: &mut ModelContext<Self>) {
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self.summary = Some(summary.into());
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cx.emit(ThreadEvent::SummaryChanged);
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}
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pub fn message(&self, id: MessageId) -> Option<&Message> {
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self.messages.iter().find(|message| message.id == id)
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}
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pub fn messages(&self) -> impl Iterator<Item = &Message> {
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self.messages.iter()
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}
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pub fn tools(&self) -> &Arc<ToolWorkingSet> {
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&self.tools
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}
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pub fn context_for_message(&self, id: MessageId) -> Option<&Vec<Context>> {
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self.context_by_message.get(&id)
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}
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pub fn pending_tool_uses(&self) -> Vec<&PendingToolUse> {
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self.pending_tool_uses_by_id.values().collect()
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}
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pub fn insert_user_message(
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&mut self,
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text: impl Into<String>,
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context: Vec<Context>,
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cx: &mut ModelContext<Self>,
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) {
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let message_id = self.insert_message(Role::User, text, cx);
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self.context_by_message.insert(message_id, context);
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}
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pub fn insert_message(
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&mut self,
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role: Role,
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text: impl Into<String>,
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cx: &mut ModelContext<Self>,
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) -> MessageId {
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let id = self.next_message_id.post_inc();
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self.messages.push(Message {
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id,
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role,
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text: text.into(),
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});
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self.touch_updated_at();
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cx.emit(ThreadEvent::MessageAdded(id));
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id
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}
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/// Returns the representation of this [`Thread`] in a textual form.
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///
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/// This is the representation we use when attaching a thread as context to another thread.
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pub fn text(&self) -> String {
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let mut text = String::new();
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for message in &self.messages {
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text.push_str(match message.role {
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language_model::Role::User => "User:",
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language_model::Role::Assistant => "Assistant:",
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language_model::Role::System => "System:",
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});
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text.push('\n');
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text.push_str(&message.text);
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text.push('\n');
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}
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text
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}
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pub fn to_completion_request(
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&self,
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_request_kind: RequestKind,
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_cx: &AppContext,
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) -> LanguageModelRequest {
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let mut request = LanguageModelRequest {
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messages: vec![],
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tools: Vec::new(),
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stop: Vec::new(),
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temperature: None,
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};
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for message in &self.messages {
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let mut request_message = LanguageModelRequestMessage {
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role: message.role,
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content: Vec::new(),
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cache: false,
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};
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if let Some(tool_results) = self.tool_results_by_message.get(&message.id) {
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for tool_result in tool_results {
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request_message
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.content
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.push(MessageContent::ToolResult(tool_result.clone()));
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}
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}
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if let Some(context) = self.context_for_message(message.id) {
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attach_context_to_message(&mut request_message, context.clone());
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}
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if !message.text.is_empty() {
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request_message
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.content
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.push(MessageContent::Text(message.text.clone()));
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}
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if let Some(tool_uses) = self.tool_uses_by_message.get(&message.id) {
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for tool_use in tool_uses {
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request_message
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.content
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.push(MessageContent::ToolUse(tool_use.clone()));
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}
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}
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request.messages.push(request_message);
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}
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request
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}
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pub fn stream_completion(
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&mut self,
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request: LanguageModelRequest,
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model: Arc<dyn LanguageModel>,
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cx: &mut ModelContext<Self>,
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) {
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let pending_completion_id = post_inc(&mut self.completion_count);
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let task = cx.spawn(|thread, mut cx| async move {
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let stream = model.stream_completion(request, &cx);
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let stream_completion = async {
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let mut events = stream.await?;
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let mut stop_reason = StopReason::EndTurn;
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while let Some(event) = events.next().await {
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let event = event?;
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thread.update(&mut cx, |thread, cx| {
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match event {
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LanguageModelCompletionEvent::StartMessage { .. } => {
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thread.insert_message(Role::Assistant, String::new(), cx);
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}
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LanguageModelCompletionEvent::Stop(reason) => {
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stop_reason = reason;
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}
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LanguageModelCompletionEvent::Text(chunk) => {
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if let Some(last_message) = thread.messages.last_mut() {
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if last_message.role == Role::Assistant {
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last_message.text.push_str(&chunk);
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cx.emit(ThreadEvent::StreamedAssistantText(
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last_message.id,
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chunk,
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));
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}
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}
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}
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LanguageModelCompletionEvent::ToolUse(tool_use) => {
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if let Some(last_assistant_message) = thread
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.messages
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.iter()
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.rfind(|message| message.role == Role::Assistant)
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{
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thread
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.tool_uses_by_message
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.entry(last_assistant_message.id)
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.or_default()
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.push(tool_use.clone());
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thread.pending_tool_uses_by_id.insert(
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tool_use.id.clone(),
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PendingToolUse {
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assistant_message_id: last_assistant_message.id,
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id: tool_use.id,
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name: tool_use.name,
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input: tool_use.input,
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status: PendingToolUseStatus::Idle,
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},
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);
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}
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}
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}
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thread.touch_updated_at();
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cx.emit(ThreadEvent::StreamedCompletion);
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cx.notify();
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})?;
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smol::future::yield_now().await;
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}
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thread.update(&mut cx, |thread, cx| {
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thread
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.pending_completions
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.retain(|completion| completion.id != pending_completion_id);
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if thread.summary.is_none() && thread.messages.len() >= 2 {
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thread.summarize(cx);
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}
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})?;
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anyhow::Ok(stop_reason)
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};
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let result = stream_completion.await;
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thread
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.update(&mut cx, |_thread, cx| match result.as_ref() {
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Ok(stop_reason) => match stop_reason {
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StopReason::ToolUse => {
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cx.emit(ThreadEvent::UsePendingTools);
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}
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StopReason::EndTurn => {}
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StopReason::MaxTokens => {}
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},
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Err(error) => {
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if error.is::<PaymentRequiredError>() {
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cx.emit(ThreadEvent::ShowError(ThreadError::PaymentRequired));
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} else if error.is::<MaxMonthlySpendReachedError>() {
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cx.emit(ThreadEvent::ShowError(ThreadError::MaxMonthlySpendReached));
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} else {
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let error_message = error
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.chain()
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.map(|err| err.to_string())
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.collect::<Vec<_>>()
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.join("\n");
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cx.emit(ThreadEvent::ShowError(ThreadError::Message(
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SharedString::from(error_message.clone()),
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)));
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}
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}
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})
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.ok();
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});
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self.pending_completions.push(PendingCompletion {
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id: pending_completion_id,
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_task: task,
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});
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}
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pub fn summarize(&mut self, cx: &mut ModelContext<Self>) {
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let Some(provider) = LanguageModelRegistry::read_global(cx).active_provider() else {
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return;
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};
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let Some(model) = LanguageModelRegistry::read_global(cx).active_model() else {
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return;
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};
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if !provider.is_authenticated(cx) {
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return;
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}
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let mut request = self.to_completion_request(RequestKind::Chat, cx);
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request.messages.push(LanguageModelRequestMessage {
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role: Role::User,
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content: vec![
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"Generate a concise 3-7 word title for this conversation, omitting punctuation. Go straight to the title, without any preamble and prefix like `Here's a concise suggestion:...` or `Title:`"
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.into(),
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],
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cache: false,
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});
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self.pending_summary = cx.spawn(|this, mut cx| {
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async move {
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let stream = model.stream_completion_text(request, &cx);
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let mut messages = stream.await?;
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let mut new_summary = String::new();
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while let Some(message) = messages.stream.next().await {
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let text = message?;
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let mut lines = text.lines();
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new_summary.extend(lines.next());
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// Stop if the LLM generated multiple lines.
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if lines.next().is_some() {
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break;
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}
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}
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this.update(&mut cx, |this, cx| {
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if !new_summary.is_empty() {
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this.summary = Some(new_summary.into());
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}
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cx.emit(ThreadEvent::SummaryChanged);
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})?;
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anyhow::Ok(())
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}
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.log_err()
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});
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}
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pub fn insert_tool_output(
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&mut self,
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assistant_message_id: MessageId,
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tool_use_id: LanguageModelToolUseId,
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output: Task<Result<String>>,
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cx: &mut ModelContext<Self>,
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) {
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let insert_output_task = cx.spawn(|thread, mut cx| {
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let tool_use_id = tool_use_id.clone();
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async move {
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let output = output.await;
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thread
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.update(&mut cx, |thread, cx| {
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// The tool use was requested by an Assistant message,
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// so we want to attach the tool results to the next
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// user message.
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let next_user_message = MessageId(assistant_message_id.0 + 1);
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let tool_results = thread
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.tool_results_by_message
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.entry(next_user_message)
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.or_default();
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match output {
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Ok(output) => {
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tool_results.push(LanguageModelToolResult {
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tool_use_id: tool_use_id.to_string(),
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content: output,
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is_error: false,
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});
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cx.emit(ThreadEvent::ToolFinished { tool_use_id });
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}
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Err(err) => {
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tool_results.push(LanguageModelToolResult {
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tool_use_id: tool_use_id.to_string(),
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content: err.to_string(),
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is_error: true,
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});
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if let Some(tool_use) =
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thread.pending_tool_uses_by_id.get_mut(&tool_use_id)
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{
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tool_use.status = PendingToolUseStatus::Error(err.to_string());
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}
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}
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}
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})
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.ok();
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}
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});
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if let Some(tool_use) = self.pending_tool_uses_by_id.get_mut(&tool_use_id) {
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tool_use.status = PendingToolUseStatus::Running {
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_task: insert_output_task.shared(),
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};
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}
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}
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}
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#[derive(Debug, Clone)]
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pub enum ThreadError {
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PaymentRequired,
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MaxMonthlySpendReached,
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Message(SharedString),
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}
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#[derive(Debug, Clone)]
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pub enum ThreadEvent {
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ShowError(ThreadError),
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StreamedCompletion,
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StreamedAssistantText(MessageId, String),
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MessageAdded(MessageId),
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SummaryChanged,
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UsePendingTools,
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ToolFinished {
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#[allow(unused)]
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tool_use_id: LanguageModelToolUseId,
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},
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}
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impl EventEmitter<ThreadEvent> for Thread {}
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struct PendingCompletion {
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id: usize,
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_task: Task<()>,
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}
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#[derive(Debug, Clone)]
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pub struct PendingToolUse {
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pub id: LanguageModelToolUseId,
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/// The ID of the Assistant message in which the tool use was requested.
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pub assistant_message_id: MessageId,
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pub name: String,
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pub input: serde_json::Value,
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pub status: PendingToolUseStatus,
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}
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#[derive(Debug, Clone)]
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pub enum PendingToolUseStatus {
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Idle,
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Running { _task: Shared<Task<()>> },
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Error(#[allow(unused)] String),
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}
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impl PendingToolUseStatus {
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pub fn is_idle(&self) -> bool {
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matches!(self, PendingToolUseStatus::Idle)
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}
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}
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