51 lines
1.4 KiB
Dart
51 lines
1.4 KiB
Dart
abstract class CoffeeStrategy {
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String announce(String roast);
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}
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class AmericanoStrategy implements CoffeeStrategy {
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String announce(String roast) => "an Americano with $roast beans";
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}
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class DripStrategy implements CoffeeStrategy {
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String announce(String roast) => "a drip coffee with $roast beans";
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}
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class MochaFrappuccinoStrategy implements CoffeeStrategy {
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String announce(String roast) => "a delicious mocha frappuccion with $roast beans";
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}
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class CoffeeDrinker {
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CoffeeStrategy preferredDrink;
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String name;
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CoffeeDrinker(this.name, this.preferredDrink);
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}
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void main() {
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var americano = AmericanoStrategy();
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var drip = DripStrategy();
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var mocha = MochaFrappuccinoStrategy();
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var me = CoffeeDrinker("Tyler", drip);
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var europeanBuddy = CoffeeDrinker("Pieter", americano);
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var myDaughter = CoffeeDrinker("Joanie", mocha);
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final String roastOfTheDay = "Italian";
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for (var person in [me, europeanBuddy, myDaughter]) {
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print("Hey ${person.name}, whatcha drinkin' over there?");
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print("I'm enjoying ${person.preferredDrink.announce(roastOfTheDay)}!\r\n");
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}
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/*
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Hey Tyler, whatcha drinkin' over there?
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I'm enjoying a drip coffee with Italian beans!
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Hey Pieter, whatcha drinkin' over there?
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I'm enjoying an Americano with Italian beans!
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Hey Joanie, whatcha drinkin' over there?
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I'm enjoying a delicious mocha frappuccion with Italian beans!
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*/
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}
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