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use super::input::resolve_data_url;
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use super::{Config, Input, Model};
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use crate::client::{Message, MessageContent, MessageRole};
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use crate::render::MarkdownRender;
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use anyhow::{bail, Context, Result};
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use serde::{Deserialize, Serialize};
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use serde_json::json;
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use std::collections::HashMap;
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use std::fs::{self, read_to_string};
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use std::path::Path;
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pub const TEMP_SESSION_NAME: &str = "temp";
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#[derive(Debug, Clone, Default, Deserialize, Serialize)]
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pub struct Session {
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#[serde(rename(serialize = "model", deserialize = "model"))]
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model_id: String,
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temperature: Option<f64>,
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top_p: Option<f64>,
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#[serde(default)]
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save_session: Option<bool>,
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messages: Vec<Message>,
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#[serde(default)]
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data_urls: HashMap<String, String>,
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#[serde(default)]
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compressed_messages: Vec<Message>,
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compress_threshold: Option<usize>,
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#[serde(skip)]
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pub name: String,
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#[serde(skip)]
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pub path: Option<String>,
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#[serde(skip)]
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pub dirty: bool,
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#[serde(skip)]
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pub compressing: bool,
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#[serde(skip)]
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pub model: Model,
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}
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impl Session {
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pub fn new(config: &Config, name: &str) -> Self {
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Self {
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model_id: config.model.id(),
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temperature: config.temperature,
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top_p: config.top_p,
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save_session: config.save_session,
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messages: vec![],
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compressed_messages: vec![],
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compress_threshold: None,
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data_urls: Default::default(),
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name: name.to_string(),
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path: None,
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dirty: false,
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compressing: false,
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model: config.model.clone(),
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}
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}
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pub fn load(name: &str, path: &Path) -> Result<Self> {
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let content = read_to_string(path)
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.with_context(|| format!("Failed to load session {} at {}", name, path.display()))?;
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let mut session: Self =
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serde_yaml::from_str(&content).with_context(|| format!("Invalid session {}", name))?;
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session.name = name.to_string();
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session.path = Some(path.display().to_string());
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Ok(session)
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}
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pub fn name(&self) -> &str {
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&self.name
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}
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pub fn model(&self) -> &str {
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&self.model_id
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}
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pub fn temperature(&self) -> Option<f64> {
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self.temperature
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}
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pub fn top_p(&self) -> Option<f64> {
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self.top_p
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}
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pub fn save_session(&self) -> Option<bool> {
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self.save_session
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}
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pub fn need_compress(&self, current_compress_threshold: usize) -> bool {
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let threshold = self
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.compress_threshold
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.unwrap_or(current_compress_threshold);
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threshold >= 1000 && self.tokens() > threshold
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}
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pub fn tokens(&self) -> usize {
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self.model.total_tokens(&self.messages)
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}
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pub fn user_messages_len(&self) -> usize {
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self.messages.iter().filter(|v| v.role.is_user()).count()
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}
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pub fn export(&self) -> Result<String> {
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if self.path.is_none() {
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bail!("Not found session '{}'", self.name)
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}
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let (tokens, percent) = self.tokens_and_percent();
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let mut data = json!({
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"path": self.path,
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"model": self.model(),
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});
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if let Some(temperature) = self.temperature() {
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data["temperature"] = temperature.into();
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}
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if let Some(top_p) = self.top_p() {
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data["top_p"] = top_p.into();
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}
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if let Some(save_session) = self.save_session() {
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data["save_session"] = save_session.into();
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}
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data["total_tokens"] = tokens.into();
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if let Some(conext_window) = self.model.max_input_tokens {
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data["max_input_tokens"] = conext_window.into();
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}
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if percent != 0.0 {
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data["total/max"] = format!("{}%", percent).into();
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}
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data["messages"] = json!(self.messages);
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let output = serde_yaml::to_string(&data)
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.with_context(|| format!("Unable to show info about session {}", &self.name))?;
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Ok(output)
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}
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pub fn info(&self, render: &mut MarkdownRender) -> Result<String> {
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let mut items = vec![];
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if let Some(path) = &self.path {
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items.push(("path", path.to_string()));
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}
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items.push(("model", self.model.id()));
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if let Some(temperature) = self.temperature() {
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items.push(("temperature", temperature.to_string()));
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}
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if let Some(top_p) = self.top_p() {
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items.push(("top_p", top_p.to_string()));
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}
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if let Some(save_session) = self.save_session() {
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items.push(("save_session", save_session.to_string()));
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}
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if let Some(compress_threshold) = self.compress_threshold {
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items.push(("compress_threshold", compress_threshold.to_string()));
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}
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if let Some(max_input_tokens) = self.model.max_input_tokens {
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items.push(("max_input_tokens", max_input_tokens.to_string()));
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}
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let mut lines: Vec<String> = items
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.iter()
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.map(|(name, value)| format!("{name:<20}{value}"))
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.collect();
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if !self.is_empty() {
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lines.push("".into());
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let resolve_url_fn = |url: &str| resolve_data_url(&self.data_urls, url.to_string());
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for message in &self.messages {
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match message.role {
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MessageRole::System => {
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lines.push(render.render(&message.content.render_input(resolve_url_fn)));
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}
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MessageRole::Assistant => {
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if let MessageContent::Text(text) = &message.content {
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lines.push(render.render(text));
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}
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lines.push("".into());
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}
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MessageRole::User => {
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lines.push(format!(
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"{}){}",
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self.name,
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message.content.render_input(resolve_url_fn)
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));
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}
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}
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}
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}
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let output = lines.join("\n");
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Ok(output)
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}
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pub fn tokens_and_percent(&self) -> (usize, f32) {
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let tokens = self.tokens();
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let max_input_tokens = self.model.max_input_tokens.unwrap_or_default();
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let percent = if max_input_tokens == 0 {
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0.0
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} else {
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let percent = tokens as f32 / max_input_tokens as f32 * 100.0;
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(percent * 100.0).round() / 100.0
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};
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(tokens, percent)
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}
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pub fn set_temperature(&mut self, value: Option<f64>) {
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if self.temperature != value {
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self.temperature = value;
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self.dirty = true;
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}
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}
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pub fn set_top_p(&mut self, value: Option<f64>) {
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if self.top_p != value {
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self.top_p = value;
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self.dirty = true;
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}
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}
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pub fn set_save_session(&mut self, value: Option<bool>) {
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if self.save_session != value {
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self.save_session = value;
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self.dirty = true;
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}
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}
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pub fn set_compress_threshold(&mut self, value: Option<usize>) {
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if self.compress_threshold != value {
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self.compress_threshold = value;
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self.dirty = true;
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}
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}
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pub fn set_model(&mut self, model: Model) -> Result<()> {
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let model_id = model.id();
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if self.model_id != model_id {
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self.model_id = model_id;
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self.dirty = true;
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}
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self.model = model;
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Ok(())
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}
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pub fn compress(&mut self, prompt: String) {
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self.compressed_messages.append(&mut self.messages);
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self.messages.push(Message {
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role: MessageRole::System,
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content: MessageContent::Text(prompt),
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});
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self.dirty = true;
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}
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pub fn save(&mut self, session_path: &Path) -> Result<()> {
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self.path = Some(session_path.display().to_string());
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let content = serde_yaml::to_string(&self)
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.with_context(|| format!("Failed to serde session {}", self.name))?;
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fs::write(session_path, content).with_context(|| {
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format!(
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"Failed to write session {} to {}",
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self.name,
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session_path.display()
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)
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})?;
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self.dirty = false;
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Ok(())
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}
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pub fn guard_empty(&self) -> Result<()> {
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if !self.is_empty() {
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bail!("Cannot perform this action in a session with messages")
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}
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Ok(())
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}
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pub fn is_temp(&self) -> bool {
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self.name == TEMP_SESSION_NAME
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}
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pub fn is_empty(&self) -> bool {
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self.messages.is_empty() && self.compressed_messages.is_empty()
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}
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pub fn add_message(&mut self, input: &Input, output: &str) -> Result<()> {
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let mut need_add_msg = true;
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if self.messages.is_empty() {
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if let Some(role) = input.role() {
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self.messages.extend(role.build_messages(input));
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need_add_msg = false;
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}
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}
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if need_add_msg {
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self.messages.push(Message {
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role: MessageRole::User,
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content: input.to_message_content(),
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});
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}
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self.data_urls.extend(input.data_urls());
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self.messages.push(Message {
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role: MessageRole::Assistant,
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content: MessageContent::Text(output.to_string()),
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});
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self.dirty = true;
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Ok(())
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}
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pub fn clear_messages(&mut self) {
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self.messages.clear();
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self.compressed_messages.clear();
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self.data_urls.clear();
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self.dirty = true;
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}
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pub fn echo_messages(&self, input: &Input) -> String {
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let messages = self.build_emssages(input);
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serde_yaml::to_string(&messages).unwrap_or_else(|_| "Unable to echo message".into())
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}
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pub fn build_emssages(&self, input: &Input) -> Vec<Message> {
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let mut messages = self.messages.clone();
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let mut need_add_msg = true;
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let len = messages.len();
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if len == 0 {
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if let Some(role) = input.role() {
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messages = role.build_messages(input);
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need_add_msg = false;
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}
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} else if len == 1 && self.compressed_messages.len() >= 2 {
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messages
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.extend(self.compressed_messages[self.compressed_messages.len() - 2..].to_vec());
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}
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if need_add_msg {
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messages.push(Message {
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role: MessageRole::User,
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content: input.to_message_content(),
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});
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}
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messages
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}
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}
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