feat: add pokeapi client

src/error.rs

@@ -0,0 +1,44 @@
+use axum::{Json, http::StatusCode, response::IntoResponse};
+use serde::Serialize;
+
+#[derive(Debug, thiserror::Error)]
+pub enum AppError {
+    #[error("pokemon not found")]
+    NotFound,
+    #[error("upstream service returned invalid data: {0}")]
+    InvalidUpstreamData(String),
+    #[error("upstream service failed: {0}")]
+    Upstream(String),
+    #[error("request timed out")]
+    Timeout,
+    #[error("internal server error")]
+    Internal,
+}
+
+impl AppError {
+    #[must_use]
+    pub const fn status_code(&self) -> StatusCode {
+        match self {
+            Self::NotFound => StatusCode::NOT_FOUND,
+            Self::InvalidUpstreamData(_) | Self::Upstream(_) | Self::Timeout => {
+                StatusCode::BAD_GATEWAY
+            }
+            Self::Internal => StatusCode::INTERNAL_SERVER_ERROR,
+        }
+    }
+}
+
+impl IntoResponse for AppError {
+    fn into_response(self) -> axum::response::Response {
+        let status = self.status_code();
+        let body = ErrorBody {
+            error: self.to_string(),
+        };
+        (status, Json(body)).into_response()
+    }
+}
+
+#[derive(Serialize)]
+struct ErrorBody {
+    error: String,
+}