Homework

src/main/kotlin/ru/otus/homework/homework/Coffee.kt

@@ -20,32 +20,23 @@ class SimpleCoffee : Coffee {
     override fun description() = "Простой кофе"
 }
 
-class MilkDecorator(private val coffee: Coffee) : Coffee {
-    override fun cost(): Int {
-        TODO("Not yet implemented")
-    }
-
-    override fun description(): String {
-        TODO("Not yet implemented")
-    }
+abstract class CoffeeDecorator(private val coffee: Coffee) : Coffee {
+    protected val base: Coffee = coffee
+    override fun cost() = base.cost()
+    override fun description() = base.description()
 }
 
-class SugarDecorator(private val coffee: Coffee) : Coffee {
-    override fun cost(): Int {
-        TODO("Not yet implemented")
-    }
-
-    override fun description(): String {
-        TODO("Not yet implemented")
-    }
+class MilkDecorator(coffee: Coffee) : CoffeeDecorator(coffee) {
+    override fun cost(): Int = base.cost() + 50
+    override fun description(): String = base.description() + ", молоко"
 }
 
-class VanillaDecorator(private val coffee: Coffee) : Coffee {
-    override fun cost(): Int {
-        TODO("Not yet implemented")
-    }
+class SugarDecorator(coffee: Coffee) : CoffeeDecorator(coffee) {
+    override fun cost(): Int = base.cost() + 20
+    override fun description(): String = base.description() + ", сахар"
+}
 
-    override fun description(): String {
-        TODO("Not yet implemented")
-    }
+class VanillaDecorator(coffee: Coffee) : CoffeeDecorator(coffee) {
+    override fun cost(): Int = base.cost() + 70
+    override fun description(): String = base.description() + ", ваниль"
 }

src/main/kotlin/ru/otus/homework/homework/NonEmptyStringDelegate.kt

@@ -5,12 +5,15 @@ import kotlin.reflect.KProperty
 /**
  * Delegate that allows to set non-empty string value
  */
-class NonEmptyStringDelegate() {
-    operator fun getValue(thisRef: Any?, property: KProperty<*>): String {
-        TODO("Implement `getValue` function")
-    }
+class NonEmptyStringDelegate(initialValue: String ="") {
+    private var value = initialValue
+
+    operator fun getValue(thisRef: Any?, property: KProperty<*>): String = value
 
     operator fun setValue(thisRef: Any?, property: KProperty<*>, newValue: String) {
-        TODO("Implement `setValue` function")
+        if (newValue.isBlank()) {
+            return
+        }
+        value = newValue
     }
 }

src/main/kotlin/ru/otus/homework/homework/UserProfile.kt

@@ -2,6 +2,8 @@
 
 package ru.otus.homework.homework
 
+import kotlin.properties.Delegates
+
 /**
  * Профиль пользователя
  */
@@ -37,8 +39,27 @@ interface UserProfile {
          * Creates user profile with logging
          */
         fun createWithLogging(fullName: String, email: String): UserProfile.Logging {
-            TODO("Implement `createWithLogging` function")
+            val profile = ProfileImplementation(fullName, email)
+
+            return object : UserProfile.Logging {
+                private val log = mutableListOf<String>()
+                override var fullName: String
+                    get() = profile.fullName
+                    set (value) {
+                        log.add("Changing `fullName` from '${profile.fullName}' to '$value'")
+                        profile.fullName = value
+                    }
+                override var email: String
+                    get() = profile.email
+                    set(value) {
+                        log.add ("Changing `email` from '${profile.email}' to '$value'")
+                        profile.email = value
+                    }
+
+                override fun getLog(): List<String> = log.toList()
+                }
         }
+
     }
 }
 
@@ -50,4 +71,11 @@ private val emailRegex = Regex("^[A-Za-z](.*)([@])(.+)(\\.)(.+)")
 /**
  * Реализация простого [UserProfile].
  */
-private class ProfileImplementation(override var fullName: String, override var email: String): UserProfile
+private class ProfileImplementation(fullName: String, email: String) : UserProfile {
+    override var fullName: String by Delegates.vetoable(fullName) { _, _, new ->
+        new.isNotBlank()
+    }
+    override var email: String by Delegates.vetoable(email) { _, _, new ->
+        emailRegex.matches(new)
+    }
+}

src/main/kotlin/ru/otus/homework/homework/processList.kt

@@ -1,14 +1,14 @@
 package ru.otus.homework.homework
 
-inline fun processList(list: List<Int>, action: (Int) -> Unit) {
-    for (item in list) {
-        action(item)
+inline fun processList(list: List<Int>, action: (Int,Int) -> Unit) {
+    for ((index, item) in list.withIndex()) {
+        action(index, item)
     }
 }
 
 fun skipThreeAndPrint(list: List<Int>) {
-    processList(list) {
-        if (it == 3) return
-        println("Processing $it")
+    processList(list) { index, value ->
+        if (index == 2) return@processList
+        println("Processing $value")
     }
-}
+}