refactor: ollama errors centralized

src/providers/ollama/client.rs

@@ -1,5 +1,5 @@
+use super::errors::OllamaError;
 use crate::dto::{api, ollama};
-use crate::errors::OllamaError;
 use axum::response::sse::Event;
 use futures::StreamExt;
 use reqwest::Client;

src/providers/ollama/errors.rs

@@ -0,0 +1,58 @@
+// errors.rs
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum OllamaError {
+    #[error("prompt is required and cannot be empty")]
+    MissingPrompt,
+
+    #[error("model is required and cannot be empty")]
+    MissingModel,
+
+    #[error("messages must be a non-empty array containing at least one user message")]
+    MissingMessages,
+
+    #[error("model '{0}' is not available — run `ollama pull {0}` first")]
+    ModelNotFound(String),
+
+    #[error("keep_alive is required and cannot be empty")]
+    MissingKeepAlive,
+
+    #[error(
+        "invalid keep_alive format '{0}' — expected <number><unit> (e.g. 30s, 10m, 2h), a plain integer (seconds), or -1"
+    )]
+    InvalidKeepAlive(String),
+
+    #[error(transparent)]
+    Http(#[from] reqwest::Error),
+}
+
+pub fn into_http_response(e: OllamaError) -> (axum::http::StatusCode, String) {
+    match e {
+        OllamaError::MissingPrompt => (
+            axum::http::StatusCode::BAD_REQUEST,
+            "prompt is required and cannot be empty".to_string(),
+        ),
+        OllamaError::MissingModel => (
+            axum::http::StatusCode::BAD_REQUEST,
+            "model is required and cannot be empty".to_string(),
+        ),
+        OllamaError::ModelNotFound(m) => (
+            axum::http::StatusCode::UNPROCESSABLE_ENTITY,
+            format!("model '{m}' is not available — run `ollama pull {m}` first"),
+        ),
+        OllamaError::MissingKeepAlive => (
+            axum::http::StatusCode::BAD_REQUEST,
+            "keep alive is required and cannot be empty".to_string(),
+        ),
+        OllamaError::InvalidKeepAlive(v) => (
+            axum::http::StatusCode::BAD_REQUEST,
+            format!("invalid keep_alive '{v}'"),
+        ),
+        OllamaError::MissingMessages => (
+            axum::http::StatusCode::BAD_REQUEST,
+            "messages array with at least one user message is required".to_string(),
+        ),
+        OllamaError::Http(e) => (axum::http::StatusCode::INTERNAL_SERVER_ERROR, e.to_string()),
+    }
+}

src/providers/ollama/mod.rs

@@ -1,2 +1,3 @@
 pub mod client;
+pub mod errors;
 pub mod mapper;