| 1 | //! Small string builders that compose status-bar / footer chips and |
| 2 | //! one-off informational messages. |
| 3 | //! |
| 4 | //! Each helper is a pure function over a small slice of `App` or |
| 5 | //! response data. Grouped here so the composer/footer renderer doesn't |
| 6 | //! need to scroll past their bodies, and so the labels can be unit |
| 7 | //! tested in isolation. |
| 8 | |
| 9 | use crate::models::Usage; |
| 10 | |
| 11 | /// Build the multi-line "Cache warmup complete: …" status message |
| 12 | /// shown after a prefix-cache warmup turn finishes. Handles all four |
| 13 | /// combinations of `prompt_cache_hit_tokens` / `prompt_cache_miss_tokens` |
| 14 | /// being present or absent so we never report "0% cache hit" for an |
| 15 | /// API call that didn't surface telemetry at all. |
| 16 | pub(super) fn cache_warmup_result(usage: &Usage) -> String { |
| 17 | let cache = match ( |
| 18 | usage.prompt_cache_hit_tokens, |
| 19 | usage.prompt_cache_miss_tokens, |
| 20 | ) { |
| 21 | (Some(hit), Some(miss)) => format!("Cache warmup complete: hit {hit} | miss {miss}"), |
| 22 | (Some(hit), None) => format!("Cache warmup complete: hit {hit} | miss unavailable"), |
| 23 | (None, Some(miss)) => format!("Cache warmup complete: hit unavailable | miss {miss}"), |
| 24 | (None, None) => "Cache warmup complete: cache telemetry unavailable".to_string(), |
| 25 | }; |
| 26 | format!( |
| 27 | "{cache}\nNote: the first warmup is usually a miss. Later requests that reuse the same stable prefix may hit the provider cache; a hit is not guaranteed." |
| 28 | ) |
| 29 | } |
| 30 | |
| 31 | /// Render the response body for `/models` / `models list` — the current |
| 32 | /// model is starred and other available models follow underneath. |
| 33 | pub(super) fn available_models_message(current_model: &str, models: &[String]) -> String { |
| 34 | let mut lines = vec![format!("Available models ({})", models.len())]; |
| 35 | for model in models { |
| 36 | if model == current_model { |
| 37 | lines.push(format!("* {model} (current)")); |
| 38 | } else { |
| 39 | lines.push(format!(" {model}")); |
| 40 | } |
| 41 | } |
| 42 | lines.join("\n") |
| 43 | } |
| 44 | |
| 45 | #[cfg(test)] |
| 46 | mod tests { |
| 47 | use super::*; |
| 48 | |
| 49 | #[test] |
| 50 | fn available_models_message_marks_current_model() { |
| 51 | let models = vec![ |
| 52 | "deepseek-v4-pro".to_string(), |
| 53 | "deepseek-v4-flash".to_string(), |
| 54 | ]; |
| 55 | let msg = available_models_message("deepseek-v4-pro", &models); |
| 56 | assert!(msg.contains("* deepseek-v4-pro (current)"), "got: {msg}"); |
| 57 | assert!(msg.contains(" deepseek-v4-flash"), "got: {msg}"); |
| 58 | assert!(msg.starts_with("Available models (2)"), "got: {msg}"); |
| 59 | } |
| 60 | |
| 61 | #[test] |
| 62 | fn cache_warmup_result_handles_missing_telemetry() { |
| 63 | let usage = Usage { |
| 64 | prompt_cache_hit_tokens: None, |
| 65 | prompt_cache_miss_tokens: None, |
| 66 | ..Default::default() |
| 67 | }; |
| 68 | let msg = cache_warmup_result(&usage); |
| 69 | assert!(msg.contains("cache telemetry unavailable"), "got: {msg}"); |
| 70 | } |
| 71 | } |
| 72 |