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@ -1,3 +1,6 @@
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# rhaj
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DSL's for our ecosystem
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```bash
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#tests, following one shows how we can dynamically load the functions from a set of rhai scripts
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cargo run --bin test_dynamic_loading
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```
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@ -1,6 +0,0 @@
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//! Rhai Engine Library
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//!
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//! This library provides utilities for working with Rhai scripts.
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// Simple example of exposing Rhai functions to a hashmap
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pub mod simple_example;
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@ -11,6 +11,10 @@ path = "src/lib.rs"
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name = "rhai_engine"
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path = "src/main.rs"
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[[bin]]
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name = "test_dynamic_loading"
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path = "examples/loadscripts/test_dynamic_loading.rs"
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[dependencies]
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rhai = "1.12.0"
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chrono = "0.4"
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@ -1,4 +1,4 @@
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// Math utility functions for Terra templates
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// Math utility functions for Tera templates
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// Format a number with commas as thousands separators
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fn format_number(num) {
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@ -1,4 +1,4 @@
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// String manipulation functions that will be exposed to Terra templates
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// String manipulation functions that will be exposed to Tera templates
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// Capitalize the first letter of each word
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fn capitalize(text) {
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98
rhai_engine/examples/loadscripts/test_dynamic_loading.rs
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98
rhai_engine/examples/loadscripts/test_dynamic_loading.rs
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@ -0,0 +1,98 @@
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use std::collections::HashMap;
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use rhai::Dynamic;
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use rhai_engine::ScriptManager;
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use std::path::Path;
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/// Test the dynamic loading of Rhai scripts and functions
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pub fn main() -> Result<(), String> {
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println!("\n=== TESTING DYNAMIC FUNCTION LOADING ===\n");
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// Create a new ScriptManager
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let mut script_manager = ScriptManager::new();
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println!("Loading Rhai scripts from scripts directory...");
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// Get the scripts directory path
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let scripts_dir = Path::new("examples/loadscripts/scripts");
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// Use the ScriptManager to load all scripts from the directory
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let loaded_scripts = script_manager.load_scripts_from_directory(scripts_dir)?;
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// Print loaded scripts
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println!("\nLoaded scripts:");
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for script in &loaded_scripts {
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println!(" - {}", script);
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}
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// Get all available functions using the get_function_names method
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let function_names = script_manager.get_function_names();
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// Print all available functions
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println!("\nAll available functions:");
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for name in &function_names {
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println!(" - {}", name);
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}
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// Group functions by their script prefix to display nicely
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let scripts = group_functions_by_script(&function_names);
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// Display functions by script
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display_functions_by_script(&scripts);
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// Test some functions from each script
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println!("\nDynamic function testing:");
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//TODO: should not start with string_utils we want capitalize as function usable as is
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script_manager.run( "string_utils:capitalize(hello world);")?;
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script_manager.run( "math_utils:format_number(1234567);")?;
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// Test evaluating a complex script
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println!("\nEvaluating a complex script:");
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let complex_script = r#"
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let sentence = "Count the words in this sentence";
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let count = test_utils:count_words(sentence);
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print("Word count: " + truncate("count",1));
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count * 2 // Return double the word count
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"#;
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// Evaluate the script
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println!("```\n{}\n```", complex_script);
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match script_manager.eval::<Dynamic>(complex_script) {
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Ok(result) => println!(" Result: {}", result),
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Err(e) => println!(" Error: {}", e)
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}
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println!("\n=== DYNAMIC FUNCTION LOADING TEST COMPLETE ===\n");
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Ok(())
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}
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// Helper function to group functions by script
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fn group_functions_by_script(function_names: &[String]) -> HashMap<String, Vec<String>> {
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let mut scripts = HashMap::new();
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for name in function_names {
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let parts: Vec<&str> = name.split(':').collect();
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if parts.len() == 2 {
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let script = parts[0].to_string();
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let func = parts[1].to_string();
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scripts.entry(script).or_insert_with(Vec::new).push(func);
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}
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}
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scripts
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}
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// Helper function to display functions grouped by script
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fn display_functions_by_script(scripts: &HashMap<String, Vec<String>>) {
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println!("\nFunctions by script:");
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for (script, funcs) in scripts {
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println!(" {}:", script);
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for func in funcs {
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println!(" - {}", func);
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}
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}
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}
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@ -0,0 +1,59 @@
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# Product Catalog
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{% let products = get_products() %}
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## All Products
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{% for product in products %}
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### {{ product.name }}
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**Price:** {{ format_price(product.price) }}
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#### Features:
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{% for feature in product.features %}
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- {{ feature }}
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{% endfor %}
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*Status: {% if product.available %}✅ In Stock{% else %}❌ Out of Stock{% endif %}*
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---
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{% endfor %}
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## Available Products
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{% let available_products = get_available_products() %}
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*Available Products: {{ available_products.len() }}*
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{% for product in available_products %}
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### {{ product.name }}
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**Price:** {{ format_price(product.price) }}
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---
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{% endfor %}
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## Total Catalog Value
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**Total Value:** {{ format_price(calculate_total_price()) }}
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## User Information
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{% let user = get_user() %}
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**Name:** {{ user.name }}
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**Email:** {{ user.email }}
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**Role:** {{ user.role }}
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**Theme:** {{ user.settings.theme }}
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### Order History
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{% for order in user.orders %}
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- **{{ order.id }}** ({{ order.date }}) - {{ format_price(order.total) }}
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{% endfor %}
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## All Product Features
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{% let features = get_all_features() %}
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{% for feature in features %}
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- {{ feature }}
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{% endfor %}
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2
rhai_engine/examples/simple/producttemplates/readme.md
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2
rhai_engine/examples/simple/producttemplates/readme.md
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@ -0,0 +1,2 @@
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the data objects which need to be filled into product_catalog.tera come from ../scripts/
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@ -0,0 +1,146 @@
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// Data objects for Tera template integration
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// This script defines complex objects that can be accessed from Tera templates
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// Create a products catalog object
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fn create_products() {
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let products = [
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#{
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id: 1,
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name: "Laptop",
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price: 1299.99,
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features: [
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"16GB RAM",
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"512GB SSD",
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"Intel i7 processor"
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],
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available: true
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},
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#{
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id: 2,
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name: "Smartphone",
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price: 899.99,
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features: [
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"6.7 inch display",
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"128GB storage",
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"12MP camera"
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],
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available: true
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},
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#{
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id: 3,
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name: "Tablet",
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price: 499.99,
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features: [
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"10.9 inch display",
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"64GB storage",
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"A14 chip"
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],
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available: false
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},
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#{
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id: 4,
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name: "Headphones",
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price: 249.99,
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features: [
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"Noise cancellation",
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"Wireless",
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"20h battery life"
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],
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available: true
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}
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];
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products
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}
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// Get all products
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fn get_products() {
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create_products()
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}
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// Get available products only
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fn get_available_products() {
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let all_products = create_products();
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let available = [];
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for product in all_products {
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if product.available {
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available.push(product);
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}
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}
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available
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}
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// Get a specific product by ID
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fn get_product_by_id(id) {
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let products = create_products();
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// Convert ID to integer to ensure type compatibility
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let search_id = id.to_int();
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for product in products {
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if product.id == search_id {
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return product;
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}
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}
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#{} // Return empty object if not found
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}
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// Calculate total price of all products
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fn calculate_total_price() {
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let products = create_products();
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let total = 0.0;
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for product in products {
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total += product.price;
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}
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total
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}
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// Format price with currency symbol
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fn format_price(price) {
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"$" + price.to_string()
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}
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// Get all product features as a flattened array
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fn get_all_features() {
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let products = create_products();
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let all_features = [];
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for product in products {
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for feature in product.features {
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all_features.push(feature);
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}
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}
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all_features
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}
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// Get a user object
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fn get_user() {
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#{
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name: "John Doe",
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email: "john@example.com",
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role: "admin",
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settings: #{
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theme: "dark",
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notifications: true,
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language: "en"
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},
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orders: [
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#{
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id: "ORD-001",
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date: "2025-03-25",
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total: 1299.99
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},
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#{
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id: "ORD-002",
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date: "2025-04-01",
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total: 249.99
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}
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]
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}
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}
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