refactor: remove role field from session struct (#356)

src/config/mod.rs

@@ -316,7 +316,8 @@ impl Config {
 
     pub fn set_role_obj(&mut self, role: Role) -> Result<()> {
         if let Some(session) = self.session.as_mut() {
-            session.update_role(Some(role.clone()))?;
+            session.guard_empty()?;
+            session.set_temperature(role.temperature);
         }
         self.temperature = role.temperature;
         self.role = Some(role);
@@ -324,9 +325,6 @@ impl Config {
     }
 
     pub fn clear_role(&mut self) -> Result<()> {
-        if let Some(session) = self.session.as_mut() {
-            session.update_role(None)?;
-        }
         self.temperature = self.default_temperature;
         self.role = None;
         Ok(())
@@ -335,7 +333,7 @@ impl Config {
     pub fn get_state(&self) -> State {
         if let Some(session) = &self.session {
             if session.is_empty() {
-                if session.role.is_some() {
+                if self.role.is_some() {
                     State::EmptySessionWithRole
                 } else {
                     State::EmptySession
@@ -592,13 +590,13 @@ impl Config {
                 self.session = Some(Session::new(
                     TEMP_SESSION_NAME,
                     self.model.clone(),
-                    self.role.clone(),
+                    self.temperature,
                 ));
             }
             Some(name) => {
                 let session_path = Self::session_file(name)?;
                 if !session_path.exists() {
-                    self.session = Some(Session::new(name, self.model.clone(), self.role.clone()));
+                    self.session = Some(Session::new(name, self.model.clone(), self.temperature));
                 } else {
                     let session = Session::load(name, &session_path)?;
                     let model = session.model().to_string();

src/config/session.rs

@@ -1,5 +1,4 @@
 use super::input::resolve_data_url;
-use super::role::Role;
 use super::{Input, Model};
 
 use crate::client::{Message, MessageContent, MessageRole};
@@ -34,14 +33,11 @@ pub struct Session {
     #[serde(skip)]
     pub compressing: bool,
     #[serde(skip)]
-    pub role: Option<Role>,
-    #[serde(skip)]
     pub model: Model,
 }
 
 impl Session {
-    pub fn new(name: &str, model: Model, role: Option<Role>) -> Self {
-        let temperature = role.as_ref().and_then(|v| v.temperature);
+    pub fn new(name: &str, model: Model, temperature: Option<f64>) -> Self {
         Self {
             model_id: model.id(),
             temperature,
@@ -53,7 +49,6 @@ impl Session {
             path: None,
             dirty: false,
             compressing: false,
-            role,
             model,
         }
     }
@@ -189,13 +184,6 @@ impl Session {
         (tokens, percent)
     }
 
-    pub fn update_role(&mut self, role: Option<Role>) -> Result<()> {
-        self.guard_empty()?;
-        self.temperature = role.as_ref().and_then(|v| v.temperature);
-        self.role = role;
-        Ok(())
-    }
-
     pub fn set_temperature(&mut self, value: Option<f64>) {
         self.temperature = value;
     }
@@ -216,7 +204,6 @@ impl Session {
             role: MessageRole::System,
             content: MessageContent::Text(prompt),
         });
-        self.role = None;
         self.dirty = true;
     }
 
@@ -260,13 +247,13 @@ impl Session {
     }
 
     pub fn is_empty(&self) -> bool {
-        self.messages.is_empty()
+        self.messages.is_empty() && self.compressed_messages.is_empty()
     }
 
     pub fn add_message(&mut self, input: &Input, output: &str) -> Result<()> {
         let mut need_add_msg = true;
         if self.messages.is_empty() {
-            if let Some(role) = self.role.as_ref() {
+            if let Some(role) = input.role() {
                 self.messages.extend(role.build_messages(input));
                 need_add_msg = false;
             }
@@ -282,7 +269,6 @@ impl Session {
             role: MessageRole::Assistant,
             content: MessageContent::Text(output.to_string()),
         });
-        self.role = None;
         self.dirty = true;
         Ok(())
     }
@@ -304,7 +290,7 @@ impl Session {
         let mut need_add_msg = true;
         let len = messages.len();
         if len == 0 {
-            if let Some(role) = self.role.as_ref() {
+            if let Some(role) = input.role() {
                 messages = role.build_messages(input);
                 need_add_msg = false;
             }