1use rskit_ai::chat::count_tokens_approx;
4use rskit_errors::AppResult;
5use rskit_llm::types::Message;
6
7use crate::types::{ContextStrategy, FailStrategy};
8
9pub(crate) fn compact_if_needed(
10 mut messages: Vec<Message>,
11 max_input_tokens: Option<u64>,
12 strategy: Option<&dyn ContextStrategy>,
13) -> AppResult<Vec<Message>> {
14 if let Some(max_input_tokens) = max_input_tokens {
15 let limit = usize::try_from(max_input_tokens).unwrap_or(usize::MAX);
16 if count_tokens_approx(&messages) > limit {
17 let strategy = strategy.unwrap_or(&FailStrategy);
18 messages = strategy.compact(messages, limit)?;
19 }
20 }
21 Ok(messages)
22}