start porting model specs into heromodels

heromodels/examples/calendar_rhai/calendar.rhai

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+// Get the database instance
+let db = get_db();
+
+// Create a new calendar
+let calendar = calendar__builder(1);
+calendar.name = "My First Calendar";
+set_description(calendar, "A calendar for testing Rhai integration");
+
+print("Created calendar: " + calendar.name);
+
+// Save the calendar to the database
+set_calendar(db, calendar);
+print("Calendar saved to database");
+
+// Check if calendar exists and retrieve it
+if calendar_exists(db, 1) {
+    let retrieved_calendar = get_calendar_by_id(db, 1);
+    print("Retrieved calendar: " + retrieved_calendar.name);
+    let desc = get_description(retrieved_calendar);
+    if desc != "" {
+        print("Description: " + desc);
+    } else {
+        print("No description available");
+    }
+} else {
+    print("Failed to retrieve calendar with ID 1");
+}
+
+// Create another calendar
+let calendar2 = calendar__builder(2);
+calendar2.name = "My Second Calendar";
+set_description(calendar2, "Another calendar for testing");
+
+set_calendar(db, calendar2);
+print("Second calendar saved");
+
+// Get all calendars
+let all_calendars = get_all_calendars(db);
+print("Total calendars: " + all_calendars.len());
+
+for calendar in all_calendars {
+    print("Calendar ID: " + get_id(calendar) + ", Name: " + calendar.name);
+}
+
+// Delete a calendar
+delete_calendar_by_id(db, 1);
+print("Deleted calendar with ID 1");
+
+// Verify deletion
+if !calendar_exists(db, 1) {
+    print("Calendar with ID 1 was successfully deleted");
+} else {
+    print("Failed to delete calendar with ID 1");
+}
+
+// Count remaining calendars
+let remaining_calendars = get_all_calendars(db);
+print("Remaining calendars: " + remaining_calendars.len());

heromodels/examples/calendar_rhai/example.rs

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+use heromodels::db::hero::OurDB;
+use heromodels::models::calendar::Calendar;
+use rhai::Engine;
+use rhai_wrapper::wrap_vec_return;
+use std::sync::Arc;
+use std::{fs, path::Path};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Initialize Rhai engine
+    let mut engine = Engine::new();
+
+    // Initialize database
+    let db = Arc::new(OurDB::new("temp_calendar_db", true).expect("Failed to create database"));
+
+    // Register the Calendar type with Rhai
+    // This function is generated by the #[rhai_model_export] attribute
+    Calendar::register_rhai_bindings_for_calendar(&mut engine, db.clone());
+
+    // Register a function to get the database instance
+    engine.register_fn("get_db", move || db.clone());
+    
+    // Register a calendar builder function
+    engine.register_fn("calendar__builder", |id: i64| {
+        Calendar::new(id as u32, "New Calendar")
+    });
+    
+    // Register setter methods for Calendar properties
+    engine.register_fn("set_description", |calendar: &mut Calendar, desc: String| {
+        calendar.description = Some(desc);
+    });
+    
+    // Register getter methods for Calendar properties
+    engine.register_fn("get_description", |calendar: Calendar| -> String {
+        calendar.description.clone().unwrap_or_default()
+    });
+    
+    // Register getter for base_data.id
+    engine.register_fn("get_id", |calendar: Calendar| -> i64 {
+        calendar.base_data.id as i64
+    });
+    
+    // Register additional functions needed by the script
+    engine.register_fn("set_calendar", |_db: Arc<OurDB>, _calendar: Calendar| {
+        // In a real implementation, this would save the calendar to the database
+        println!("Calendar saved: {}", _calendar.name);
+    });
+    
+    engine.register_fn("get_calendar_by_id", |_db: Arc<OurDB>, id: i64| -> Calendar {
+        // In a real implementation, this would retrieve the calendar from the database
+        Calendar::new(id as u32, "Retrieved Calendar")
+    });
+    
+    // Register a function to check if a calendar exists
+    engine.register_fn("calendar_exists", |_db: Arc<OurDB>, id: i64| -> bool {
+        // In a real implementation, this would check if the calendar exists in the database
+        id == 1 || id == 2
+    });
+    
+    // Define the function separately to use with the wrap_vec_return macro
+    fn get_all_calendars(_db: Arc<OurDB>) -> Vec<Calendar> {
+        // In a real implementation, this would retrieve all calendars from the database
+        vec![Calendar::new(1, "Calendar 1"), Calendar::new(2, "Calendar 2")]
+    }
+    
+    // Register the function with the wrap_vec_return macro
+    engine.register_fn("get_all_calendars", wrap_vec_return!(get_all_calendars, Arc<OurDB> => Calendar));
+    
+    engine.register_fn("delete_calendar_by_id", |_db: Arc<OurDB>, _id: i64| {
+        // In a real implementation, this would delete the calendar from the database
+        println!("Calendar deleted with ID: {}", _id);
+    });
+
+    // Load and evaluate the Rhai script
+    let script_path = Path::new("examples/calendar_rhai/calendar.rhai");
+    let script = fs::read_to_string(script_path)?;
+    
+    match engine.eval::<()>(&script) {
+        Ok(_) => println!("Script executed successfully!"),
+        Err(e) => eprintln!("Script execution failed: {}", e),
+    }
+
+    Ok(())
+}