fix: improve json error handling, make email_address optional

Cargo.lock

@@ -193,6 +193,7 @@ dependencies = [
  "reqwest-middleware",
  "serde",
  "serde_json",
+ "serde_path_to_error",
  "serenity",
  "sqlx",
  "thiserror 2.0.16",

Cargo.toml

@@ -43,5 +43,6 @@ tracing-subscriber = { version = "0.3.20", features = ["env-filter", "json"] }
 url = "2.5"
 governor = "0.10.1"
 once_cell = "1.21.3"
+serde_path_to_error = "0.1.17"
 
 [dev-dependencies]

src/banner/json.rs

@@ -1,16 +1,34 @@
 //! JSON parsing utilities for the Banner API client.
 
 use anyhow::Result;
+use serde_json;
 
 /// Attempt to parse JSON and, on failure, include a contextual snippet of the
 /// line where the error occurred. This prevents dumping huge JSON bodies to logs.
 pub fn parse_json_with_context<T: serde::de::DeserializeOwned>(body: &str) -> Result<T> {
-    match serde_json::from_str::<T>(body) {
+    let jd = &mut serde_json::Deserializer::from_str(body);
+    match serde_path_to_error::deserialize(jd) {
         Ok(value) => Ok(value),
         Err(err) => {
-            let (line, column) = (err.line(), err.column());
-            // let snippet = build_error_snippet(body, line, column, 80);
-            Err(anyhow::anyhow!("{err} at line {line}, column {column}",))
+            let inner_err = err.inner();
+            let (line, column) = (inner_err.line(), inner_err.column());
+            let snippet = build_error_snippet(body, line, column, 20);
+            let path = err.path().to_string();
+
+            let msg = inner_err.to_string();
+            let loc = format!(" at line {line} column {column}");
+            let msg_without_loc = msg.strip_suffix(&loc).unwrap_or(&msg).to_string();
+
+            let mut final_err = String::new();
+            if !path.is_empty() && path != "." {
+                final_err.push_str(&format!("for path '{}' ", path));
+            }
+            final_err.push_str(&format!(
+                "({msg_without_loc}) at line {line} column {column}"
+            ));
+            final_err.push_str(&format!("\n{snippet}"));
+
+            Err(anyhow::anyhow!(final_err))
         }
     }
 }

src/banner/models/meetings.rs

@@ -33,7 +33,7 @@ pub struct FacultyItem {
     #[serde(deserialize_with = "deserialize_string_to_u32")]
     pub course_reference_number: u32, // CRN, e.g 27294
     pub display_name: String,     // "LastName, FirstName"
-    pub email_address: String,    // e.g. FirstName.LastName@utsaedu
+    pub email_address: Option<String>, // e.g. FirstName.LastName@utsaedu
     pub primary_indicator: bool,
     pub term: String, // e.g "202420"
 }