refactor: clients/* and config.rs (#193)

- add register_clients macro to make it easier to add a new client
- no create_client_config, just add const PROMPTS
- move ModelInfo from clients/ to config/
- model's max_tokens are optional
- improve code quanity on config/mod.rs
- add/use macro config_get_fn

1 files changed, 8 insertions, 1 deletions

diff --git a/src/config/message.rs b/src/config/message.rs
index d5fcff1..5882337 100644
--- a/src/config/message.rs
+++ b/src/config/message.rs
@@ -17,7 +17,7 @@ impl Message {
     }
 }
 
-#[derive(Debug, Clone, Deserialize, Serialize)]
+#[derive(Debug, Clone, Copy, Deserialize, Serialize)]
 #[serde(rename_all = "snake_case")]
 pub enum MessageRole {
     System,
@@ -25,6 +25,13 @@ pub enum MessageRole {
     User,
 }
 
+impl MessageRole {
+    #[allow(dead_code)]
+    pub fn is_system(&self) -> bool {
+        matches!(self, MessageRole::System)
+    }
+}
+
 pub fn num_tokens_from_messages(messages: &[Message]) -> usize {
     let mut num_tokens = 0;
     for message in messages.iter() {