class-protocol-playground.swift

//
// CLASSES and  PROTOCOLS
//
// References:
// - http://nshipster.com/swift-documentation/
// - http://books.aidanf.net/learn-swift/protocols
//

import UIKit

//
// This is like an interface in java, if you implement a class or struct with
// this protocol, then it must provide an implementation for the specified
// behaviors
//

/**
must have a function that describes the class or struct
*/
protocol Describable {
    func desc() -> String
}

/**
 must have a function(s)
 * name
 * sayHello
 * sayGoodbye
 */
protocol Dialect {
    var name:String {get set}
    func sayHello()->String
    func sayGoodbye()->String
}

protocol Language:Dialect,Describable {
    
}

/**
 this must provide the functions outlined in the protocols
 */
class Spanish:Language {
    var hello:String
    var goodbye:String
    var name:String = "Spanish"
    
    /**
     - Parameter hello
     - Parameter goodbye
     */
    init (hello:String,goodbye:String) {
        self.hello = hello
        self.goodbye = goodbye
    }
    
    func sayGoodbye() -> String {
        return goodbye
    }
    func sayHello() -> String {
        return hello
    }
    func desc() -> String {
        return "\(name) Language"
    }
    
}

/**
 this must provide the functions outlined in the protocols
 */
class French:Language {
    var hello:String
    var goodbye:String
    var name:String = "French"
    
    /**
     - Parameter hello
     - Parameter goodbye
     */
    init (hello:String,goodbye:String) {
        self.hello = hello
        self.goodbye = goodbye
    }
    
    func sayGoodbye() -> String {
        return goodbye
    }
    func sayHello() -> String {
        return hello
    }
    func desc() -> String {
        return "\(name) Language"
    }
    
}

var spanish = Spanish(hello:"hola", goodbye:"adiós")
print(spanish.desc())

print(spanish.sayGoodbye())


var french = French(hello:"Salut", goodbye:"Au revoir")
print(french.desc())
print(french.sayGoodbye())


/// A individual that speaks a specific language and can say hello and goodbye
class Person:Describable {
    /// language they speak
    let speaks:Language
    
    /// the person's name
    let name:String
    
    /**
     Initializes the person object
     
     - Parameter name: The style of the bicycle
     - Parameter speaks: the class for the language they speak
     */
    init(name:String, speaks:Language) {
        self.speaks = speaks
        self.name = name
    }
    /**
     - Returns: string for hello
     */
    func sayHello() -> String {
        return (speaks.sayHello())
    }
    /**
     - Returns: string describing the person object
     */
    func desc() -> String {
        return "My name is \(name) and I speak \(speaks.desc())"
    }
}

var aaron = Person(name:"Aaron Saunders", speaks:french);
print("\(aaron.name) says hello '\(aaron.sayHello())'")
aaron.desc()