Check for deleted items

src/format.rs

@@ -58,6 +58,17 @@ pub fn format_new_item(item: &ShopItem) -> String {
     }
 }
 
+pub fn format_deleted_item(item: &ShopItem) -> String {
+    formatdoc! {
+        "*Item DELETED:* {full_name}
+        *Description:* {description}
+        *Price:* {price}",
+        full_name = item.full_name,
+        description = item.description.as_ref().unwrap_or(&"_not set_".into()),
+        price = item.price,
+    }
+}
+
 #[cfg(test)]
 mod format_new_tests {
     use super::*;

src/lib.rs

@@ -58,6 +58,13 @@ async fn run_scrape(env: Env) -> Result<String> {
         }
     }
 
+    // Check if any items have been removed.
+    for item in &old_items {
+        if !available_items.iter().any(|i| i.id == item.id) {
+            result.push(format::format_deleted_item(item));
+        }
+    }
+
     // If there are any updates/new items, send a message to the Slack webhook.
     if result.is_empty() {
         return Ok("No changes detected".into());