add structured logging

src/ingest.rs

@@ -12,12 +12,10 @@ const DIM_PRESERVATION: &str = "Preservation (EUMOFAPreservation)";
 const DIM_SHIPSIZE: &str = "Shipsize";
 const DIM_MEASURE: &str = "measure";
 
-const SENTINEL_VALUES: [f64; 1] = [-1.0];
+const SENTINEL_VALUE: f64 = -1.0;
 
 fn is_sentinel(v: f64) -> bool {
-    SENTINEL_VALUES
-        .iter()
-        .any(|s| v.total_cmp(s) == std::cmp::Ordering::Equal)
+    v.total_cmp(&SENTINEL_VALUE) == std::cmp::Ordering::Equal
 }
 
 pub async fn fetch_metadata(client: &Client, url: &str) -> Result<(LookupMap, MetadataResponse)> {
@@ -83,13 +81,14 @@ pub fn chunk_months(months: &[String], batch_size: usize) -> Vec<Vec<String>> {
         .collect()
 }
 
-pub fn build_query(all_months: &[String]) -> Query {
-    assert!(
-        !all_months.is_empty(),
-        "build_query requires at least one month"
-    );
+pub fn build_query(all_months: &[String]) -> Result<Query> {
+    if all_months.is_empty() {
+        return Err(IngestError::InvalidValueCode(
+            "build_query requires at least one month".to_string(),
+        ));
+    }
 
-    Query {
+    Ok(Query {
         query: vec![
             QueryItem {
                 code: DIM_MONTH.to_string(),
@@ -149,7 +148,7 @@ pub fn build_query(all_months: &[String]) -> Query {
             },
         ],
         response: QueryResponse::default(),
-    }
+    })
 }
 
 pub async fn fetch_data(client: &Client, url: &str, query: &Query) -> Result<DataResponse> {