Create try_query.rs

Tiny example of how to use query API

Author: AlexMikhalev

lib/examples/try_query.rs

@@ -0,0 +1,45 @@
+use atomic_lib::errors::AtomicResult;
+use atomic_lib::{storelike::Query, Store, Storelike};
+
+fn main() -> AtomicResult<()> {
+    // Initialize a new store
+    let store = Store::init()?;
+    // Populate it with some default data
+    store.populate()?;
+
+    // Create a query for all resources that are instances of the Class class
+    let mut query = Query::new_class("https://atomicdata.dev/classes/Class");
+    // Include resources from other servers as well
+    query.include_external = true;
+
+    // Execute the query
+    let result = store.query(&query)?;
+
+    println!("Found {} instances of Class:", result.subjects.len());
+
+    // Iterate through all found resources
+    for subject in result.subjects {
+        // Get the full resource
+        match store.get_resource(&subject) {
+            Ok(resource) => {
+                // Try to get the shortname and description
+                let shortname = resource
+                    .get_shortname("shortname", &store)
+                    .map(|v| v.to_string())
+                    .unwrap_or_else(|_| "No shortname".to_string());
+
+                let description = resource
+                    .get_shortname("description", &store)
+                    .map(|v| v.to_string())
+                    .unwrap_or_else(|_| "No description".to_string());
+
+                println!("\nClass: {}", shortname);
+                println!("Subject: {}", subject);
+                println!("Description: {}", description);
+            }
+            Err(e) => eprintln!("Error fetching resource {}: {}", subject, e),
+        }
+    }
+
+    Ok(())
+}