fix: streaming

readme.md

@@ -275,6 +275,10 @@ This project turns Ollama into:
 👉 A controllable model runtime
 👉 A foundation for a full LLM gateway
 
+# Bugs
+## Ollama
+- When model answer onoly with 1 tokens, answer is empty
+
 # TODO
 - open api doc for bearer token
 - Unify check before sending to ollama payload

src/api/docs.rs

@@ -24,24 +24,24 @@ use crate::api::routes;
     components(
         schemas(
             api::errors::ErrorResponse,
-            api::types::ModelsResponse,
-            api::types::ModelInfo,
-            api::types::LoadModelResponse,
-            api::types::LoadModelRequest,
-            api::types::UnloadModelResponse,
-            api::types::LLMOptions,
-            api::types::CompletionRequest,
-            api::types::CompletionObject,
-            api::types::FinishReason,
-            api::types::CompletionResponse,
+            api::types::ApiModelsResponse,
+            api::types::ApiModelInfo,
+            api::types::ApiLoadModelResponse,
+            api::types::ApiLoadModelRequest,
+            api::types::ApiUnloadModelResponse,
+            api::types::ApiLlmOptions,
+            api::types::ApiCompletionRequest,
+            api::types::ApiCompletionObject,
+            api::types::ApiFinishReason,
+            api::types::ApiCompletionResponse,
             api::types::Choice,
             api::types::Usage,
             api::types::CompletionChunk,
-            api::types::ChatRequest,
-            api::types::Message,
-            api::types::Role,
-            api::types::ChatResponse,
-            api::types::ChatChoice,
+            api::types::ApiChatRequest,
+            api::types::ApiMessage,
+            api::types::ApiRole,
+            api::types::ApiChatResponse,
+            api::types::ApiChatChoice,
             api::types::ChatCompletionChunk,
             api::types::ChatChunkChoice,
             api::types::Delta,

src/api/errors.rs

@@ -17,6 +17,8 @@ pub struct ErrorResponse {
     pub code: String,
 }
 
+#[derive(Debug, thiserror::Error)]
+#[error("{message}")]
 pub struct ApiError {
     pub status: StatusCode,
     pub code: &'static str,

src/api/middlewares/auth.rs

@@ -58,8 +58,14 @@ pub async fn auth_middleware(
     };
 
     match handle_auth(&state, req, next, auth).await {
-        Ok(response) => response,
-        Err(err) => err.into_response(),
+        Ok(response) => {
+            tracing::debug!("User authentified");
+            response
+        }
+        Err(err) => {
+            tracing::debug!("Error during authentification {:?}", err);
+            err.into_response()
+        }
     }
 }
 

src/api/routes/v1/chat.rs

@@ -20,7 +20,7 @@ use uuid::Uuid;
     path = "/completions",
     tag = "chat",
     request_body(
-        content = api::types::CompletionRequest,
+        content = api::types::ApiCompletionRequest,
         description = "Text completion request",
         content_type = "application/json"
     ),
@@ -28,7 +28,7 @@ use uuid::Uuid;
         (
             status = 200,
             description = "Text completion response. If stream=true, response is SSE stream of chunks ending in [DONE].",
-            body = api::types::CompletionResponse,
+            body = api::types::ApiCompletionResponse,
             content_type = "application/json"
         ),
         (
@@ -53,17 +53,16 @@ use uuid::Uuid;
 )]
 pub async fn completions(
     State(state): State<SharedState>,
-    Json(body): Json<api::types::CompletionRequest>,
+    Json(body): Json<api::types::ApiCompletionRequest>,
 ) -> Result<impl IntoResponse, ApiError> {
     tracing::debug!("Received /completion with body {:?}", body);
 
     let response = state.chat_service.complete(body.into()).await?;
 
     match response {
-        CompletionResult::NoStream(res) => Ok(Json::<
-            crate::core::llm::completions::CompletionResultNoStream,
-        >(res)
-        .into_response()),
+        CompletionResult::NoStream(res) => {
+            Ok(Json::<crate::api::types::ApiCompletionResponse>(res.into()).into_response())
+        }
         CompletionResult::Stream(stream) => {
             let sse_stream = stream.map(|item| match item {
                 Ok(event) => {
@@ -85,7 +84,7 @@ pub async fn completions(
     path = "/chat/completions",
     tag = "chat",
     request_body(
-        content = api::types::ChatRequest,
+        content = api::types::ApiChatRequest,
         description = "Chat completion request with message history",
         content_type = "application/json"
     ),
@@ -93,7 +92,7 @@ pub async fn completions(
         (
             status = 200,
             description = "Chat completion response. If stream=false returns JSON. If stream=true returns SSE stream of chunks ending with [DONE].",
-            body = api::types::ChatResponse,
+            body = api::types::ApiChatResponse,
             content_type = "application/json"
         ),
         (
@@ -125,7 +124,7 @@ pub async fn completions(
 pub async fn chat_completions(
     State(state): State<SharedState>,
     Extension(auth): Extension<Auth>,
-    Json(body): Json<api::types::ChatRequest>,
+    Json(body): Json<api::types::ApiChatRequest>,
 ) -> Result<impl IntoResponse, ApiError> {
     tracing::debug!("Received /chat/completion with body {:?}", body);
 
@@ -133,15 +132,68 @@ pub async fn chat_completions(
 
     match response {
         crate::core::llm::chat::ChatCompletionResult::NoStream(res) => {
-            Ok(Json::<crate::core::llm::chat::ChatCompletionResultNoStream>(res).into_response())
+            Ok(Json::<crate::api::types::ApiChatResponse>(res.into()).into_response())
         }
         crate::core::llm::chat::ChatCompletionResult::Stream(stream) => {
-            let sse_stream = stream.map(|item| match item {
-                Ok(event) => {
-                    let data = serde_json::to_string(&event).unwrap_or_default();
-                    Ok(Event::default().data(data))
+            let sse_stream = stream.map(|item| -> Result<Event, ApiError> {
+                tracing::debug!("{:?}", item);
+                match item {
+                    Err(e) => {
+                        tracing::debug!("Error in chat_completions: {:?}", e);
+                        Err(ApiError::from(e))
+                    }
+
+                    Ok(crate::core::llm::chat::ChatCompletionStreamEvent::Start {
+                        conversation_id,
+                        message_id,
+                        created_at,
+                    }) => {
+                        let payload = serde_json::to_string(&api::types::StreamEvent::Start(
+                            api::types::StartEventData {
+                                conversation_id,
+                                created: created_at,
+                                id: message_id,
+                            },
+                        ))
+                        .unwrap_or_default();
+                        Ok(Event::default().data(payload))
+                    }
+
+                    Ok(crate::core::llm::chat::ChatCompletionStreamEvent::Token(tok)) => {
+                        let chunk = api::types::ChatCompletionChunk {
+                            id: String::new(),
+                            object: "chat.completion.chunk".to_string(),
+                            choices: vec![api::types::ChatChunkChoice {
+                                index: 0,
+                                delta: api::types::Delta {
+                                    content: Some(tok),
+                                    role: None,
+                                },
+                                finish_reason: None,
+                            }],
+                            usage: None,
+                        };
+                        let payload = serde_json::to_string(&api::types::StreamEvent::Delta(chunk))
+                            .unwrap_or_default();
+                        Ok(Event::default().data(payload))
+                    }
+
+                    Ok(crate::core::llm::chat::ChatCompletionStreamEvent::Final(res)) => {
+                        let payload = serde_json::to_string(&api::types::StreamEvent::End(
+                            api::types::EndEventData {
+                                created: res.created_at.parse().unwrap_or(0),
+                                id: res.id,
+                                usage: api::types::Usage {
+                                    prompt_tokens: res.prompt_tokens,
+                                    completion_tokens: res.completion_tokens,
+                                    total_tokens: res.prompt_tokens + res.completion_tokens,
+                                },
+                            },
+                        ))
+                        .unwrap_or_default();
+                        Ok(Event::default().data(payload))
+                    }
                 }
-                Err(e) => Err(e),
             });
 
             Ok(Sse::new(sse_stream)
@@ -192,146 +244,3 @@ pub async fn get_messages(
 
     Ok(Json(messages.into()))
 }
-
-// async fn handle_stream(
-//     state: AppState,
-//     auth: Auth,
-//     body: api::ChatRequest,
-//     conversation_id: Option<Uuid>,
-// ) -> Result<Response, ApiError> {
-//     // Handle anonymous (API key) path early — no DB logging
-//     let Some(conv_id) = conversation_id else {
-//         let stream = state.ollama.chat_completions_stream(&body).await?;
-
-//         let plain_stream = stream.map(
-//             |item| -> Result<Event, crate::providers::ollama::errors::OllamaError> {
-//                 match item {
-//                     Ok(chunk) => Ok(
-//                         Event::default().data(serde_json::to_string(&chunk).unwrap_or_default())
-//                     ),
-//                     Err(e) => Err(e),
-//                 }
-//             },
-//         );
-//         return Ok(Sse::new(plain_stream)
-//             .keep_alive(KeepAlive::default())
-//             .into_response());
-//     };
-
-//     // From here conv_id is a plain Uuid — all variables stay in scope
-//     let user_msg_id = log_user_message(
-//         &state.postgres,
-//         auth.user_id(),
-//         conv_id,
-//         body.parent_id,
-//         body.messages
-//             .last()
-//             .map(|m| m.content.as_str())
-//             .unwrap_or(""),
-//         None,
-//     )
-//     .await?;
-
-//     let start_event = api::StreamEvent::Start(api::StartEventData {
-//         conversation_id: conv_id,
-//         created: chrono::Utc::now().timestamp() as u64,
-//         id: user_msg_id,
-//     });
-
-//     let (tx, rx) = tokio::sync::mpsc::channel::<
-//         Result<Event, crate::providers::ollama::errors::OllamaError>,
-//     >(32);
-
-//     // Send start event immediately, before Ollama is contacted
-//     let _ = tx
-//         .send(Ok(Event::default()
-//             .event("metadata")
-//             .data(serde_json::to_string(&start_event).unwrap())))
-//         .await;
-
-//     let pool = state.postgres.clone();
-//     let user_id = auth.user_id();
-
-//     tokio::spawn(async move {
-//         // Ollama called inside spawn — start event already queued
-//         let stream = match state.ollama.chat_completions_stream(&body).await {
-//             Ok(s) => s,
-//             Err(e) => {
-//                 let _ = tx.send(Err(e)).await;
-//                 return;
-//             }
-//         };
-
-//         let mut stream = stream;
-//         let mut accumulated = String::new();
-
-//         while let Some(item) = futures::StreamExt::next(&mut stream).await {
-//             match item {
-//                 Ok(chunk) => {
-//                     let is_done = chunk.choices[0].finish_reason == Some(api::FinishReason::Stop);
-
-//                     if let Some(content) = chunk.choices[0].delta.content.as_ref() {
-//                         accumulated.push_str(content);
-//                     }
-
-//                     if is_done {
-//                         let prompt_tokens = chunk.usage.as_ref().map(|u| u.prompt_tokens);
-//                         let completion_tokens = chunk.usage.as_ref().map(|u| u.completion_tokens);
-
-//                         if let Some(pt) = prompt_tokens {
-//                             let _ = update_message_tokens(&pool, user_id, user_msg_id, pt).await;
-//                         }
-
-//                         let assistant_msg_id = log_assistant_message(
-//                             &pool,
-//                             user_id,
-//                             conv_id,
-//                             user_msg_id,
-//                             &accumulated,
-//                             completion_tokens,
-//                         )
-//                         .await;
-
-//                         if let Ok(msg_id) = assistant_msg_id {
-//                             let end_event = api::StreamEvent::End(api::EndEventData {
-//                                 usage: api::Usage {
-//                                     prompt_tokens: prompt_tokens.unwrap_or(0),
-//                                     completion_tokens: completion_tokens.unwrap_or(0),
-//                                     total_tokens: chunk
-//                                         .usage
-//                                         .as_ref()
-//                                         .map(|u| u.total_tokens)
-//                                         .unwrap_or(0),
-//                                 },
-//                                 id: msg_id,
-//                                 created: chrono::Utc::now().timestamp() as u64,
-//                             });
-
-//                             let _ = tx
-//                                 .send(Ok(Event::default()
-//                                     .event("metadata")
-//                                     .data(serde_json::to_string(&end_event).unwrap())))
-//                                 .await;
-//                         }
-
-//                         break;
-//                     }
-
-//                     let data = api::StreamEvent::Delta(chunk);
-//                     let json = serde_json::to_string(&data).unwrap();
-//                     if tx.send(Ok(Event::default().data(json))).await.is_err() {
-//                         break;
-//                     }
-//                 }
-//                 Err(e) => {
-//                     let _ = tx.send(Err(e)).await;
-//                     break;
-//                 }
-//             }
-//         }
-//     });
-
-//     Ok(Sse::new(tokio_stream::wrappers::ReceiverStream::new(rx))
-//         .keep_alive(KeepAlive::default())
-//         .into_response())
-// }

src/api/routes/v1/mod.rs

@@ -43,9 +43,11 @@ pub fn protected_router() -> Router<SharedState> {
 pub fn router(state: SharedState) -> Router<SharedState> {
     Router::new()
         .merge(public_router())
-        .merge(protected_router().layer(middleware::from_fn_with_state(
+        .merge(
+            protected_router().route_layer(middleware::from_fn_with_state(
                 state.clone(),
                 auth_middleware,
-        )))
+            )),
+        )
         .with_state(state)
 }

src/api/routes/v1/models.rs

@@ -13,7 +13,7 @@ use axum::{
         (
             status = 200,
             description = "List of locally available Ollama models",
-            body = api::types::ModelsResponse,
+            body = api::types::ApiModelsResponse,
             content_type = "application/json",
         ),
         (
@@ -27,7 +27,7 @@ use axum::{
 // #[axum::debug_handler]
 pub async fn list_models(
     State(state): State<SharedState>,
-) -> Result<Json<api::types::ModelsResponse>, api::errors::ApiError> {
+) -> Result<Json<api::types::ApiModelsResponse>, api::errors::ApiError> {
     let models = state.chat_service.list_models().await?;
 
     Ok(Json(models.into()))
@@ -41,7 +41,7 @@ pub async fn list_models(
         ("model" = String, Path, description = "Name of the model to load into memory (e.g. 'llama3')")
     ),
     request_body(
-        content = api::types::LoadModelRequest,
+        content = api::types::ApiLoadModelRequest,
         description = "Load model request",
         content_type = "application/json",
         example = json!({ "keep_alive": "10m" })
@@ -50,7 +50,7 @@ pub async fn list_models(
         (
             status = 200,
             description = "Model successfully loaded into memory",
-            body = api::types::LoadModelResponse,
+            body = api::types::ApiLoadModelResponse,
             content_type = "application/json",
         ),
         (
@@ -79,8 +79,8 @@ pub async fn list_models(
 pub async fn load_model(
     State(state): State<SharedState>,
     Path(model): Path<String>,
-    Json(body): Json<api::types::LoadModelRequest>,
-) -> Result<Json<api::types::LoadModelResponse>, api::errors::ApiError> {
+    Json(body): Json<api::types::ApiLoadModelRequest>,
+) -> Result<Json<api::types::ApiLoadModelResponse>, api::errors::ApiError> {
     let response = state
         .chat_service
         .load_model(crate::core::llm::models::LoadModelRequest {
@@ -89,7 +89,7 @@ pub async fn load_model(
         })
         .await?;
 
-    Ok(Json(api::types::LoadModelResponse {
+    Ok(Json(api::types::ApiLoadModelResponse {
         model: response.model,
         keep_alive: body.keep_alive,
         status: "loaded".to_string(),

src/api/types.rs

@@ -6,43 +6,43 @@ use uuid::Uuid;
 // ------ Models ------
 
 #[derive(Debug, Serialize, ToSchema)]
-pub struct ModelInfo {
+pub struct ApiModelInfo {
     pub name: String,
     pub family: Option<String>,
     pub parameter_size: Option<String>,
-    pub metadata: ModelMetadata,
+    pub metadata: ApiModelMetadata,
 }
 
 #[derive(Debug, Clone, Default, Serialize, ToSchema)]
-pub struct ModelMetadata {
+pub struct ApiModelMetadata {
     pub extra: HashMap<String, String>,
 }
 
 // ------ Endpoint: /models ------
 
 #[derive(Debug, Serialize, ToSchema)]
-pub struct ModelsResponse {
-    pub models: Vec<ModelInfo>,
+pub struct ApiModelsResponse {
+    pub models: Vec<ApiModelInfo>,
 }
 
 // ------ Endpoint: /models/{model}/load ------
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]
-pub struct LoadModelResponse {
+pub struct ApiLoadModelResponse {
     pub model: String,
     pub status: String,
     pub keep_alive: String,
 }
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]
-pub struct LoadModelRequest {
+pub struct ApiLoadModelRequest {
     pub keep_alive: String,
 }
 
 // ------ Endpoint: /models/{model}/unload ------
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]
-pub struct UnloadModelResponse {
+pub struct ApiUnloadModelResponse {
     pub model: String,
     pub status: String,
 }
@@ -50,7 +50,7 @@ pub struct UnloadModelResponse {
 // ------ Completions ------
 
 #[derive(Debug, Deserialize, Serialize, ToSchema, Default)]
-pub struct LLMOptions {
+pub struct ApiLlmOptions {
     #[serde(default)]
     pub stream: bool,
 
@@ -74,18 +74,18 @@ pub struct LLMOptions {
 // ------ Endpoint: /completions ------
 
 #[derive(Debug, Deserialize, Serialize, ToSchema)]
-pub struct CompletionRequest {
+pub struct ApiCompletionRequest {
     #[serde(flatten)]
-    pub options: LLMOptions,
+    pub options: ApiLlmOptions,
 
     pub model: String,
     pub prompt: String,
 }
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]
-pub struct CompletionResponse {
+pub struct ApiCompletionResponse {
     pub id: Uuid,
-    pub object: CompletionObject,
+    pub object: ApiCompletionObject,
     pub created: String,
     pub model: String,
     pub choices: Vec<Choice>,
@@ -94,7 +94,7 @@ pub struct CompletionResponse {
 
 #[derive(Debug, Serialize, Deserialize, ToSchema, PartialEq, Eq)]
 #[serde(rename_all = "snake_case")]
-pub enum CompletionObject {
+pub enum ApiCompletionObject {
     TextCompletion,
 }
 
@@ -102,7 +102,7 @@ pub enum CompletionObject {
 
 #[derive(Debug, Serialize, Deserialize, ToSchema, PartialEq, Eq)]
 #[serde(rename_all = "snake_case")]
-pub enum FinishReason {
+pub enum ApiFinishReason {
     Stop,
     Length,
     ContentFilter,
@@ -114,7 +114,7 @@ pub enum FinishReason {
 pub struct Choice {
     pub text: String,
     pub index: u32,
-    pub finish_reason: FinishReason,
+    pub finish_reason: ApiFinishReason,
 }
 
 #[derive(Debug, Serialize, Deserialize, ToSchema, Clone, Copy)]
@@ -132,12 +132,12 @@ pub struct CompletionChunk {
 }
 
 #[derive(Debug, Deserialize, Serialize, ToSchema)]
-pub struct ChatRequest {
+pub struct ApiChatRequest {
     #[serde(flatten)]
-    pub base: LLMOptions,
+    pub base: ApiLlmOptions,
 
     pub model: String,
-    pub message: Message,
+    pub message: ApiMessage,
 
     // Non standard Open AI
     pub conversation_id: Option<Uuid>,
@@ -145,36 +145,36 @@ pub struct ChatRequest {
 }
 
 #[derive(Debug, Deserialize, Serialize, ToSchema)]
-pub struct Message {
-    pub role: Role,
+pub struct ApiMessage {
+    pub role: ApiRole,
     pub content: String,
 }
 
 #[derive(Debug, Deserialize, Serialize, ToSchema, PartialEq, Eq)]
 #[serde(rename_all = "lowercase")]
-pub enum Role {
+pub enum ApiRole {
     System,
     User,
     Assistant,
 }
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]
-pub struct ChatResponse {
-    pub id: String,
-    pub object: String,
-    pub created: u64,
+pub struct ApiChatResponse {
+    pub id: Uuid,
+    pub object: ApiCompletionObject,
+    pub created: String,
     pub model: String,
-    pub choices: Vec<ChatChoice>,
+    pub choices: Vec<ApiChatChoice>,
     pub usage: Usage,
 
     pub conversation_id: Uuid,
 }
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]
-pub struct ChatChoice {
+pub struct ApiChatChoice {
     pub index: u32,
-    pub message: Message,
-    pub finish_reason: FinishReason,
+    pub message: ApiMessage,
+    pub finish_reason: ApiFinishReason,
 }
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]
@@ -189,39 +189,39 @@ pub struct ChatCompletionChunk {
 pub struct ChatChunkChoice {
     pub index: u32,
     pub delta: Delta,
-    pub finish_reason: Option<FinishReason>,
+    pub finish_reason: Option<ApiFinishReason>,
 }
 
 #[derive(Debug, Serialize, Deserialize, ToSchema)]
 pub struct Delta {
     pub content: Option<String>,
-    pub role: Option<Role>,
+    pub role: Option<ApiRole>,
 }
 
-// #[derive(Debug, Serialize, Deserialize, ToSchema)]
-// pub struct StartEventData {
-//     pub conversation_id: Uuid,
-//     pub created: u64,
-//     pub id: Uuid,
-// }
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+pub struct StartEventData {
+    pub conversation_id: Uuid,
+    pub created: u64,
+    pub id: Uuid,
+}
 
-// #[derive(Debug, Serialize, Deserialize, ToSchema)]
-// pub struct EndEventData {
-//     pub created: u64,
-//     pub id: Uuid,
-//     pub usage: Usage,
-// }
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+pub struct EndEventData {
+    pub created: u64,
+    pub id: Uuid,
+    pub usage: Usage,
+}
 
-// #[derive(Debug, Serialize, Deserialize, ToSchema)]
-// #[serde(tag = "type", content = "data")]
-// pub enum StreamEvent {
-//     #[serde(rename = "start")]
-//     Start(StartEventData),
-//     #[serde(rename = "end")]
-//     End(EndEventData),
-//     #[serde(rename = "delta")]
-//     Delta(ChatCompletionChunk),
-// }
+#[derive(Debug, Serialize, Deserialize, ToSchema)]
+#[serde(tag = "type", content = "data")]
+pub enum StreamEvent {
+    #[serde(rename = "start")]
+    Start(StartEventData),
+    #[serde(rename = "end")]
+    End(EndEventData),
+    #[serde(rename = "delta")]
+    Delta(ChatCompletionChunk),
+}
 
 // ------ Api Key ------
 

src/core/llm/chat.rs

@@ -1,10 +1,11 @@
 use super::ChatRole;
 
-use crate::providers::ollama::errors::LlmError;
+use crate::services::errors::ServiceError;
 
 use futures::Stream;
 use serde::Serialize;
 use std::pin::Pin;
+use uuid::Uuid;
 
 #[derive(Debug, Clone, Default)]
 pub struct ChatCompletionOptions {
@@ -45,24 +46,30 @@ pub struct ChatCompletionResultNoStream {
 
     pub created_at: String,
     pub id: uuid::Uuid,
+    pub conversation_id: Uuid,
 
     pub prompt_tokens: u32,
     pub completion_tokens: u32,
 
-    pub done_reason: Option<String>,
+    pub done_reason: String,
 
-    pub total_duration: Option<u64>,
-    pub load_duration: Option<u64>,
+    pub total_duration: u64,
+    pub load_duration: u64,
 }
 
-#[derive(Serialize)]
+#[derive(Debug, Serialize)]
 pub enum ChatCompletionStreamEvent {
+    Start {
+        conversation_id: Uuid,
+        message_id: Uuid,
+        created_at: u64,
+    },
     Token(String),
     Final(ChatCompletionResultNoStream),
 }
 
 pub type ChatCompletionStream =
-    Pin<Box<dyn Stream<Item = Result<ChatCompletionStreamEvent, LlmError>> + Send>>;
+    Pin<Box<dyn Stream<Item = Result<ChatCompletionStreamEvent, ServiceError>> + Send>>;
 
 pub enum ChatCompletionResult {
     Stream(ChatCompletionStream),

src/mappers/api_to_core.rs

@@ -1,7 +1,7 @@
 use crate::{api, core};
 
-impl From<api::types::CompletionRequest> for core::llm::completions::CompletionRequest {
-    fn from(m: api::types::CompletionRequest) -> Self {
+impl From<api::types::ApiCompletionRequest> for core::llm::completions::CompletionRequest {
+    fn from(m: api::types::ApiCompletionRequest) -> Self {
         Self {
             model: m.model,
             prompt: m.prompt,
@@ -20,8 +20,8 @@ impl From<api::types::CompletionRequest> for core::llm::completions::CompletionR
     }
 }
 
-impl From<api::types::ChatRequest> for core::llm::chat::ChatCompletionRequest {
-    fn from(m: api::types::ChatRequest) -> Self {
+impl From<api::types::ApiChatRequest> for core::llm::chat::ChatCompletionRequest {
+    fn from(m: api::types::ApiChatRequest) -> Self {
         Self {
             model: m.model,
             message: m.message.into(),
@@ -43,13 +43,13 @@ impl From<api::types::ChatRequest> for core::llm::chat::ChatCompletionRequest {
     }
 }
 
-impl From<api::types::Message> for core::llm::chat::Message {
-    fn from(m: api::types::Message) -> Self {
+impl From<api::types::ApiMessage> for core::llm::chat::Message {
+    fn from(m: api::types::ApiMessage) -> Self {
         Self {
             role: match m.role {
-                api::types::Role::System => core::llm::ChatRole::System,
-                api::types::Role::User => core::llm::ChatRole::User,
-                api::types::Role::Assistant => core::llm::ChatRole::Assistant,
+                api::types::ApiRole::System => core::llm::ChatRole::System,
+                api::types::ApiRole::User => core::llm::ChatRole::User,
+                api::types::ApiRole::Assistant => core::llm::ChatRole::Assistant,
             },
             content: m.content,
         }

src/mappers/core_to_api.rs

@@ -1,6 +1,6 @@
 use crate::{api, core};
 
-impl From<core::llm::models::Models> for api::types::ModelsResponse {
+impl From<core::llm::models::Models> for api::types::ApiModelsResponse {
     fn from(m: core::llm::models::Models) -> Self {
         Self {
             models: m.models.into_iter().map(Into::into).collect(),
@@ -8,7 +8,7 @@ impl From<core::llm::models::Models> for api::types::ModelsResponse {
     }
 }
 
-impl From<core::llm::models::ModelMetadata> for api::types::ModelMetadata {
+impl From<core::llm::models::ModelMetadata> for api::types::ApiModelMetadata {
     fn from(m: core::llm::models::ModelMetadata) -> Self {
         Self {
             extra: m
@@ -20,7 +20,7 @@ impl From<core::llm::models::ModelMetadata> for api::types::ModelMetadata {
     }
 }
 
-impl From<core::llm::models::Model> for api::types::ModelInfo {
+impl From<core::llm::models::Model> for api::types::ApiModelInfo {
     fn from(m: core::llm::models::Model) -> Self {
         Self {
             name: m.name,
@@ -79,15 +79,28 @@ impl From<core::databases::conversations::MessageList> for api::types::MessageLi
     }
 }
 
-impl From<core::llm::completions::CompletionResultNoStream> for api::types::CompletionResponse {
+impl From<core::llm::chat::Message> for api::types::ApiMessage {
+    fn from(c: core::llm::chat::Message) -> Self {
+        Self {
+            role: match c.role {
+                core::llm::ChatRole::User => api::types::ApiRole::User,
+                core::llm::ChatRole::Assistant => api::types::ApiRole::Assistant,
+                core::llm::ChatRole::System => api::types::ApiRole::System,
+            },
+            content: c.content,
+        }
+    }
+}
+
+impl From<core::llm::completions::CompletionResultNoStream> for api::types::ApiCompletionResponse {
     fn from(m: core::llm::completions::CompletionResultNoStream) -> Self {
         Self {
             id: m.id,
-            object: api::types::CompletionObject::TextCompletion,
+            object: api::types::ApiCompletionObject::TextCompletion,
             created: m.created_at,
             model: m.model,
             choices: vec![api::types::Choice {
-                finish_reason: api::types::FinishReason::Stop,
+                finish_reason: api::types::ApiFinishReason::Stop,
                 text: m.text,
                 index: 0,
             }],
@@ -99,3 +112,25 @@ impl From<core::llm::completions::CompletionResultNoStream> for api::types::Comp
         }
     }
 }
+
+impl From<core::llm::chat::ChatCompletionResultNoStream> for api::types::ApiChatResponse {
+    fn from(m: core::llm::chat::ChatCompletionResultNoStream) -> Self {
+        Self {
+            id: m.id,
+            conversation_id: m.conversation_id,
+            object: api::types::ApiCompletionObject::TextCompletion,
+            created: m.created_at,
+            model: m.model,
+            choices: vec![api::types::ApiChatChoice {
+                finish_reason: api::types::ApiFinishReason::Stop,
+                message: m.message.into(),
+                index: 0,
+            }],
+            usage: api::types::Usage {
+                completion_tokens: m.completion_tokens,
+                prompt_tokens: m.prompt_tokens,
+                total_tokens: m.completion_tokens + m.prompt_tokens,
+            },
+        }
+    }
+}

src/providers/ollama/client.rs

@@ -285,28 +285,35 @@ impl OllamaProvider {
             .await?
             .bytes_stream();
 
-        let stream = byte_stream.flat_map(|chunk_result| {
-            let mut out: Vec<Result<super::types::OllamaChatStreamEvent, LlmError>> = Vec::new();
-
+        let stream = byte_stream
+            .flat_map(|chunk_result| {
+                let mut out: Vec<Result<super::types::OllamaChatStreamEvent, LlmError>> =
+                    Vec::new();
                 let chunk = match chunk_result {
                     Ok(b) => b,
                     Err(e) => {
+                        tracing::debug!("Error: {:?}", e);
                         out.push(Err(LlmError::Http(e)));
                         return futures::stream::iter(out);
                     }
                 };
 
+                tracing::debug!("Raw line: {:?}", std::str::from_utf8(&chunk));
+
                 for line in chunk.split(|&b| b == b'\n') {
                     if line.is_empty() {
                         continue;
                     }
 
-                let parsed: ollama::types::OllamaChatResponse = match serde_json::from_slice(line) {
+                    let parsed: ollama::types::OllamaChatResponse =
+                        match serde_json::from_slice(line) {
                             Ok(v) => v,
                             Err(_) => continue,
                         };
 
-                if !parsed.message.content.is_empty() && !parsed.done {
+                    tracing::debug!("Parsed: {:?}", parsed);
+
+                    if !parsed.message.content.is_empty() {
                         out.push(Ok(super::types::OllamaChatStreamEvent::Token(
                             parsed.message.content.clone(),
                         )));
@@ -317,8 +324,22 @@ impl OllamaProvider {
                         return futures::stream::iter(out);
                     }
                 }
-
                 futures::stream::iter(out)
+            })
+            .scan(String::new(), |acc, event| {
+                let result = match event {
+                    Ok(ollama::types::OllamaChatStreamEvent::Token(ref tok)) => {
+                        acc.push_str(tok);
+                        Some(event)
+                    }
+                    Ok(ollama::types::OllamaChatStreamEvent::Final(mut resp)) => {
+                        tracing::debug!("Acc: {:?}", acc);
+                        resp.message.content = std::mem::take(acc);
+                        Some(Ok(ollama::types::OllamaChatStreamEvent::Final(resp)))
+                    }
+                    Err(_) => Some(event),
+                };
+                futures::future::ready(result)
             });
 
         Ok(Box::pin(stream))

src/providers/ollama/types.rs

@@ -117,13 +117,13 @@ pub struct OllamaChatResponse {
     pub message: OllamaMessage,
 
     pub done: bool,
-    pub done_reason: Option<String>,
+    pub done_reason: String,
 
-    pub total_duration: Option<u64>,
-    pub load_duration: Option<u64>,
+    pub total_duration: u64,
+    pub load_duration: u64,
 
-    pub prompt_eval_count: Option<u32>,
-    pub eval_count: Option<u32>,
+    pub prompt_eval_count: u32,
+    pub eval_count: u32,
 }
 
 #[derive(Debug)]

src/services/chat_service.rs

@@ -109,7 +109,14 @@ impl ChatService {
             .resolve_conversation_with_title(auth.user_id(), &body)
             .await?;
 
+        tracing::debug!(
+            "Received conversation_id={:?}, parent_id={:?}",
+            conversation_id,
+            body.parent_id
+        );
+
         let user_msg_id = self
+            .conversation
             .log_user_message(
                 auth.user_id(),
                 conversation_id,
@@ -122,50 +129,81 @@ impl ChatService {
         let stream = body.options.stream;
 
         let history = self
-            .build_chat_history(
-                auth.user_id(),
-                conversation_id,
-                body.message.clone(),
-                body.options.context_depth,
-            )
+            .build_chat_history(auth.user_id(), conversation_id, body.options.context_depth)
             .await?;
 
         let mut request: crate::providers::ollama::types::OllamaChatRequest = body.into();
         request.messages = history.into_iter().map(Into::into).collect();
 
         if stream {
+            let created_at = 3;
+
+            let start_event = futures::stream::once(async move {
+                Ok(core::llm::chat::ChatCompletionStreamEvent::Start {
+                    conversation_id,
+                    message_id: user_msg_id,
+                    created_at,
+                })
+            });
+
             let ollama_stream = self.ollama.chat_completions_stream(&request).await?;
 
-            let mapped = ollama_stream.map(|item| {
-                item.map(|event| match event {
-                    OllamaChatStreamEvent::Token(tok) => {
-                        core::llm::chat::ChatCompletionStreamEvent::Token(tok)
+            let conversation_svc = self.conversation.clone();
+            let user_id = auth.user_id();
+
+            let mapped = ollama_stream.then(move |item| {
+                let conversation_svc = conversation_svc.clone();
+                async move {
+                    match item {
+                        Err(e) => Err(e.into()),
+                        Ok(OllamaChatStreamEvent::Token(tok)) => {
+                            Ok(core::llm::chat::ChatCompletionStreamEvent::Token(tok))
                         }
-                    OllamaChatStreamEvent::Final(resp) => {
-                        core::llm::chat::ChatCompletionStreamEvent::Final(
+                        Ok(OllamaChatStreamEvent::Final(resp)) => {
+                            tracing::debug!("Inserting {:?}", resp.message.content);
+
+                            let assistant_message_id = conversation_svc
+                                .log_assistant_message(
+                                    user_id,
+                                    conversation_id,
+                                    user_msg_id,
+                                    &resp.message.content,
+                                    resp.eval_count,
+                                )
+                                .await?;
+
+                            conversation_svc
+                                .update_message_tokens(user_id, user_msg_id, resp.prompt_eval_count)
+                                .await?;
+
+                            Ok(core::llm::chat::ChatCompletionStreamEvent::Final(
                                 core::llm::chat::ChatCompletionResultNoStream {
-                                id: Uuid::new_v4(),
+                                    id: assistant_message_id,
+                                    conversation_id,
                                     created_at: resp.created_at,
                                     model: resp.model,
                                     message: resp.message.into(),
-                                prompt_tokens: resp.prompt_eval_count.unwrap_or(0),
-                                completion_tokens: resp.eval_count.unwrap_or(0),
+                                    prompt_tokens: resp.prompt_eval_count,
+                                    completion_tokens: resp.eval_count,
                                     done_reason: resp.done_reason,
                                     total_duration: resp.total_duration,
                                     load_duration: resp.load_duration,
                                 },
-                        )
+                            ))
+                        }
+                    }
                 }
-                })
             });
 
             Ok(core::llm::chat::ChatCompletionResult::Stream(Box::pin(
-                mapped,
+                start_event.chain(mapped),
             )))
         } else {
             let response = self.ollama.chat_completions(&request).await?;
 
-            self.log_assistant_message(
+            let assistant_message_id = self
+                .conversation
+                .log_assistant_message(
                     auth.user_id(),
                     conversation_id,
                     user_msg_id,
@@ -174,20 +212,17 @@ impl ChatService {
                 )
                 .await?;
             self.conversation
-                .update_message_tokens(
-                    auth.user_id(),
-                    user_msg_id,
-                    response.prompt_eval_count.unwrap_or_default(),
-                )
+                .update_message_tokens(auth.user_id(), user_msg_id, response.prompt_eval_count)
                 .await?;
 
             let enriched = core::llm::chat::ChatCompletionResultNoStream {
-                id: Uuid::new_v4(),
+                id: assistant_message_id,
+                conversation_id,
                 created_at: response.created_at,
                 model: response.model,
                 message: response.message.into(),
-                prompt_tokens: response.prompt_eval_count.unwrap_or(0),
-                completion_tokens: response.eval_count.unwrap_or(0),
+                prompt_tokens: response.prompt_eval_count,
+                completion_tokens: response.eval_count,
                 done_reason: response.done_reason,
                 total_duration: response.total_duration,
                 load_duration: response.load_duration,
@@ -247,7 +282,6 @@ impl ChatService {
         &self,
         auth_user_id: Uuid,
         conversation_id: Uuid,
-        body_messages: crate::core::llm::chat::Message,
         context_depth: u32,
     ) -> Result<Vec<crate::core::llm::chat::Message>, ServiceError> {
         let messages = self
@@ -270,48 +304,6 @@ impl ChatService {
 
         history.reverse();
 
-        history.push(body_messages);
-
         Ok(history)
     }
-
-    async fn log_user_message(
-        &self,
-        user_id: Uuid,
-        conversation_id: Uuid,
-        parent_id: Option<Uuid>,
-        content: &str,
-        tokens: Option<u32>,
-    ) -> Result<Uuid, ServiceError> {
-        self.conversation
-            .log_message(
-                user_id,
-                conversation_id,
-                parent_id,
-                llm::ChatRole::User,
-                content,
-                tokens,
-            )
-            .await
-    }
-
-    async fn log_assistant_message(
-        &self,
-        user_id: Uuid,
-        conversation_id: Uuid,
-        parent_id: Uuid,
-        content: &str,
-        tokens: Option<u32>,
-    ) -> Result<Uuid, ServiceError> {
-        self.conversation
-            .log_message(
-                user_id,
-                conversation_id,
-                Some(parent_id),
-                llm::ChatRole::Assistant,
-                content,
-                tokens,
-            )
-            .await
-    }
 }

src/services/conversation_service.rs

@@ -46,17 +46,23 @@ impl ConversationService {
     ) -> Result<core::databases::conversations::MessageList, ServiceError> {
         let limit = pointer.limit;
 
-        let messages = postgres::chat::queries::get_conversation_messages(
+        let mut messages = postgres::chat::queries::get_conversation_messages(
             &self.postgres,
             user_id,
             conversation_id,
-            limit,
+            limit + 1,
             pointer.before,
         )
         .await?;
 
         let has_more = messages.len() == limit as usize;
 
+        if has_more {
+            messages.pop();
+        }
+
+        messages.reverse();
+
         Ok(crate::core::databases::conversations::MessageList {
             messages: messages.into_iter().map(Into::into).collect(),
             has_more,
@@ -118,6 +124,44 @@ impl ConversationService {
         Ok(id)
     }
 
+    pub async fn log_user_message(
+        &self,
+        user_id: Uuid,
+        conversation_id: Uuid,
+        parent_id: Option<Uuid>,
+        content: &str,
+        tokens: Option<u32>,
+    ) -> Result<Uuid, ServiceError> {
+        self.log_message(
+            user_id,
+            conversation_id,
+            parent_id,
+            crate::core::llm::ChatRole::User,
+            content,
+            tokens,
+        )
+        .await
+    }
+
+    pub async fn log_assistant_message(
+        &self,
+        user_id: Uuid,
+        conversation_id: Uuid,
+        parent_id: Uuid,
+        content: &str,
+        tokens: u32,
+    ) -> Result<Uuid, ServiceError> {
+        self.log_message(
+            user_id,
+            conversation_id,
+            Some(parent_id),
+            crate::core::llm::ChatRole::Assistant,
+            content,
+            Some(tokens),
+        )
+        .await
+    }
+
     pub async fn update_message_tokens(
         &self,
         user_id: Uuid,

src/services/errors.rs

@@ -2,6 +2,7 @@ use crate::databases::errors::DbError;
 use crate::providers::keycloak::errors::AuthError;
 use crate::providers::ollama::errors::LlmError;
 
+#[derive(Debug)]
 pub enum ServiceError {
     Db(DbError),
     Llm(LlmError),