From 2d992efee3f7ea90ff958ec106ba794fbfa2b629 Mon Sep 17 00:00:00 2001
From: Oleh Makarytskyi <olleglion02@gmail.com>
Date: Tue, 12 May 2026 15:20:53 +0300
Subject: [PATCH] add discount strategy

---
 .../java/core/basesyntax/DiscountStrategy.java | 18 ++++++++++++++++++
 .../basesyntax/strategy/DiscountService.java   |  5 +++++
 .../strategy/impl/BirthdayDiscountService.java | 10 ++++++++++
 .../impl/BlackFridayDiscountService.java       | 10 ++++++++++
 .../strategy/impl/DefaultDiscountService.java  | 10 ++++++++++
 .../strategy/impl/NewYearDiscountService.java  | 10 ++++++++++
 6 files changed, 63 insertions(+)
 create mode 100644 src/main/java/core/basesyntax/DiscountStrategy.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..e8db503c
--- /dev/null
+++ b/src/main/java/core/basesyntax/DiscountStrategy.java
@@ -0,0 +1,18 @@
+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 {
+    public DiscountService getDiscountServiceBySpecialEvent(String specialEvent) {
+        return switch (specialEvent) {
+            case "Birthday" -> new BirthdayDiscountService();
+            case "New Year" -> new NewYearDiscountService();
+            case "Black Friday" -> new BlackFridayDiscountService();
+            default -> new DefaultDiscountService();
+        };
+    }
+}
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..63f78c45
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/impl/BirthdayDiscountService.java
@@ -0,0 +1,10 @@
+package core.basesyntax.strategy.impl;
+
+import core.basesyntax.strategy.DiscountService;
+
+public class BirthdayDiscountService implements DiscountService {
+    @Override
+    public double getDiscount() {
+        return 33;
+    }
+}
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..aff8bb60
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/impl/BlackFridayDiscountService.java
@@ -0,0 +1,10 @@
+package core.basesyntax.strategy.impl;
+
+import core.basesyntax.strategy.DiscountService;
+
+public class BlackFridayDiscountService implements DiscountService {
+    @Override
+    public double getDiscount() {
+        return 45;
+    }
+}
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..9c3b522d
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/impl/DefaultDiscountService.java
@@ -0,0 +1,10 @@
+package core.basesyntax.strategy.impl;
+
+import core.basesyntax.strategy.DiscountService;
+
+public class DefaultDiscountService implements DiscountService {
+    @Override
+    public double getDiscount() {
+        return 0;
+    }
+}
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..e799547b
--- /dev/null
+++ b/src/main/java/core/basesyntax/strategy/impl/NewYearDiscountService.java
@@ -0,0 +1,10 @@
+package core.basesyntax.strategy.impl;
+
+import core.basesyntax.strategy.DiscountService;
+
+public class NewYearDiscountService implements DiscountService {
+    @Override
+    public double getDiscount() {
+        return 20;
+    }
+}