feat(ai): add endpoints to chat with ai service (#8585)

Co-authored-by: Riddhiagrawal001 <riddhi.agrawal2112@gmail.com>
Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>

crates/router/src/core/chat.rs

@@ -0,0 +1,57 @@
+use api_models::chat as chat_api;
+use common_utils::{
+    consts,
+    errors::CustomResult,
+    request::{Method, RequestBuilder, RequestContent},
+};
+use error_stack::ResultExt;
+use external_services::http_client;
+use hyperswitch_domain_models::chat as chat_domain;
+use router_env::{instrument, logger, tracing};
+
+use crate::{
+    db::errors::chat::ChatErrors,
+    routes::SessionState,
+    services::{authentication as auth, ApplicationResponse},
+};
+
+#[instrument(skip_all)]
+pub async fn get_data_from_hyperswitch_ai_workflow(
+    state: SessionState,
+    user_from_token: auth::UserFromToken,
+    req: chat_api::ChatRequest,
+) -> CustomResult<ApplicationResponse<chat_api::ChatResponse>, ChatErrors> {
+    let url = format!("{}/webhook", state.conf.chat.hyperswitch_ai_host);
+
+    let request_body = chat_domain::HyperswitchAiDataRequest {
+        query: chat_domain::GetDataMessage {
+            message: req.message,
+        },
+        org_id: user_from_token.org_id,
+        merchant_id: user_from_token.merchant_id,
+        profile_id: user_from_token.profile_id,
+    };
+    logger::info!("Request for AI service: {:?}", request_body);
+
+    let request = RequestBuilder::new()
+        .method(Method::Post)
+        .url(&url)
+        .attach_default_headers()
+        .set_body(RequestContent::Json(Box::new(request_body.clone())))
+        .build();
+
+    let response = http_client::send_request(
+        &state.conf.proxy,
+        request,
+        Some(consts::REQUEST_TIME_OUT_FOR_AI_SERVICE),
+    )
+    .await
+    .change_context(ChatErrors::InternalServerError)
+    .attach_printable("Error when sending request to AI service")?
+    .json::<_>()
+    .await
+    .change_context(ChatErrors::InternalServerError)
+    .attach_printable("Error when deserializing response from AI service")?;
+
+    Ok(ApplicationResponse::Json(response))
+}