Orientación a Objetos
Botlang tiene soporte para orientación a objetos en base a clases. Soporta herencia simple (no múltiple).
Definición de clases, creación de objetos, y envío de mensajes
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74 | #!scheme
(defclass Product
[attributes id category name price]
[methods
(init (fun (self id category name price)
(@! self "id" id)
(@! self "category" category)
(@! self "name" name)
(@! self "price" price)
))
]
)
;; Cheese es una categoría de Products
(defclass Cheese
[extends Product]
[methods
(init (fun (self id name price)
(super self "init" id "Cheese" name price)
))
]
)
;; Camembert está en la categoría 'Cheese'
(defclass Camembert
[extends Cheese]
[methods
(init (fun (self id price)
(super self "init" id "Camembert" price)
))
]
)
;; Y necesitamos un carro para comprar nuestro queso
(defclass ShoppingCart
[attributes
(products (make-dict))
]
[methods
(add-product (fun (self product)
(put! (@ self "products") (@ product "id") product)
))
(get-products (fun (self)
(map
(fun (product) (send product "serialize"))
(values (@ self "products"))
)
))
]
)
;; Inicializamos un ShoppingCart
(define cart (new ShoppingCart))
;; Inicializamos y agregamos productos a nuestro carro de compra
(map
(fun (product) (send cart "add-product" product))
(list
(new Cheese "id1" "Roquefort 100g" 4200)
(new Camembert "id2" 3900)
)
)
;; Creamos un bot-node
(bot entry-node (context message)
(node-result
(put context "carro" (send cart "get-products"))
"Dejé tu carro en el contexto"
end-node
)
)
entry-node
|