From 7382607752587a219c05e3437a651e8b80498d2c Mon Sep 17 00:00:00 2001
From: Stanislav <Sergie3005@gmail.com>
Date: Thu, 9 Apr 2026 18:18:45 +0300
Subject: [PATCH] strategy pattern

---
 .../core/basesyntax/DiscountStrategy.java     | 22 +++++++++++++++++++
 src/main/java/core/basesyntax/HelloWorld.java |  8 -------
 .../basesyntax/strategy/DiscountService.java  |  5 +++++
 .../impl/BirthdayDiscountService.java         | 12 ++++++++++
 .../impl/BlackFridayDiscountService.java      | 12 ++++++++++
 .../strategy/impl/DefaultDiscountService.java | 12 ++++++++++
 .../strategy/impl/NewYearDiscountService.java | 12 ++++++++++
 7 files changed, 75 insertions(+), 8 deletions(-)
 create mode 100644 src/main/java/core/basesyntax/DiscountStrategy.java
 delete mode 100644 src/main/java/core/basesyntax/HelloWorld.java
 create mode 100644 src/main/java/core/basesyntax/strategy/DiscountService.java
 create mode 100644 src/main/java/core/basesyntax/strategy/impl/BirthdayDiscountService.java
 create mode 100644 src/main/java/core/basesyntax/strategy/impl/BlackFridayDiscountService.java
 create mode 100644 src/main/java/core/basesyntax/strategy/impl/DefaultDiscountService.java
 create mode 100644 src/main/java/core/basesyntax/strategy/impl/NewYearDiscountService.java

diff --git a/src/main/java/core/basesyntax/DiscountStrategy.java b/src/main/java/core/basesyntax/DiscountStrategy.java
new file mode 100644
index 00000000..6b3029e6
--- /dev/null
+++ b/src/main/java/core/basesyntax/DiscountStrategy.java
@@ -0,0 +1,22 @@
+package core.basesyntax;
+
+import core.basesyntax.strategy.DiscountService;
+import core.basesyntax.strategy.impl.BirthdayDiscountService;
+import core.basesyntax.strategy.impl.BlackFridayDiscountService;
+import core.basesyntax.strategy.impl.DefaultDiscountService;
+import core.basesyntax.strategy.impl.NewYearDiscountService;
+
+public class DiscountStrategy {
+    DiscountService getDiscountServiceBySpecialEvent(String specialEvent) {
+        switch (specialEvent) {
+            case "Birthday":
+                return new BirthdayDiscountService();
+            case "Black Friday":
+                return new BlackFridayDiscountService();
+            case "New Year":
+                return new NewYearDiscountService();
+            default:
+                return new DefaultDiscountService();
+        }
+    }
+}
diff --git a/src/main/java/core/basesyntax/HelloWorld.java b/src/main/java/core/basesyntax/HelloWorld.java
deleted file mode 100644
index 97db782b..00000000
--- a/src/main/java/core/basesyntax/HelloWorld.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package core.basesyntax;
-
-/**
- * Feel free to remove this class and create your own.
- */
-public class HelloWorld {
-
-}
diff --git a/src/main/java/core/basesyntax/strategy/DiscountService.java b/src/main/java/core/basesyntax/strategy/DiscountService.java
new file mode 100644
index 00000000..492e1b37
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/DiscountService.java
@@ -0,0 +1,5 @@
+package core.basesyntax.strategy;
+
+public interface DiscountService {
+    double getDiscount();
+}
diff --git a/src/main/java/core/basesyntax/strategy/impl/BirthdayDiscountService.java b/src/main/java/core/basesyntax/strategy/impl/BirthdayDiscountService.java
new file mode 100644
index 00000000..2db0d348
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/impl/BirthdayDiscountService.java
@@ -0,0 +1,12 @@
+package core.basesyntax.strategy.impl;
+
+import core.basesyntax.strategy.DiscountService;
+
+public class BirthdayDiscountService implements DiscountService {
+    private static final int BIRTHDAY_DISCOUNT = 33;
+
+    @Override
+    public double getDiscount() {
+        return BIRTHDAY_DISCOUNT;
+    }
+}
diff --git a/src/main/java/core/basesyntax/strategy/impl/BlackFridayDiscountService.java b/src/main/java/core/basesyntax/strategy/impl/BlackFridayDiscountService.java
new file mode 100644
index 00000000..0a67cb64
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/impl/BlackFridayDiscountService.java
@@ -0,0 +1,12 @@
+package core.basesyntax.strategy.impl;
+
+import core.basesyntax.strategy.DiscountService;
+
+public class BlackFridayDiscountService implements DiscountService {
+    private static final int BLACK_FRIDAY_DISCOUNT = 45;
+
+    @Override
+    public double getDiscount() {
+        return BLACK_FRIDAY_DISCOUNT;
+    }
+}
diff --git a/src/main/java/core/basesyntax/strategy/impl/DefaultDiscountService.java b/src/main/java/core/basesyntax/strategy/impl/DefaultDiscountService.java
new file mode 100644
index 00000000..4d2f183c
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/impl/DefaultDiscountService.java
@@ -0,0 +1,12 @@
+package core.basesyntax.strategy.impl;
+
+import core.basesyntax.strategy.DiscountService;
+
+public class DefaultDiscountService implements DiscountService {
+    private static final int DEFAULT_DISCOUNT = 0;
+
+    @Override
+    public double getDiscount() {
+        return DEFAULT_DISCOUNT;
+    }
+}
diff --git a/src/main/java/core/basesyntax/strategy/impl/NewYearDiscountService.java b/src/main/java/core/basesyntax/strategy/impl/NewYearDiscountService.java
new file mode 100644
index 00000000..4aea6ba6
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/impl/NewYearDiscountService.java
@@ -0,0 +1,12 @@
+package core.basesyntax.strategy.impl;
+
+import core.basesyntax.strategy.DiscountService;
+
+public class NewYearDiscountService implements DiscountService {
+    private static final int NEW_YEAR_DISCOUNT = 20;
+
+    @Override
+    public double getDiscount() {
+        return NEW_YEAR_DISCOUNT;
+    }
+}