From f5ce95e2dc820c0ad336d8923c4b0e13642c50a9 Mon Sep 17 00:00:00 2001
From: qvalentin <valentin.theodor@web.de>
Date: Sun, 15 May 2022 11:38:10 +0200
Subject: [PATCH] add ID generators

---
 .../main/java/category/CategoryUseCase.java   |  1 -
 .../category/RandomCategoryIdGenerator.java   | 20 +++++++++++++++++++
 .../src/main/java/link/LinkUseCase.java       |  1 -
 .../main/java/link/RandomLinkIdGenerator.java | 19 ++++++++++++++++++
 4 files changed, 39 insertions(+), 2 deletions(-)
 create mode 100644 2-Application/src/main/java/category/RandomCategoryIdGenerator.java
 create mode 100644 2-Application/src/main/java/link/RandomLinkIdGenerator.java

diff --git a/2-Application/src/main/java/category/CategoryUseCase.java b/2-Application/src/main/java/category/CategoryUseCase.java
index 2b83312..36327ee 100644
--- a/2-Application/src/main/java/category/CategoryUseCase.java
+++ b/2-Application/src/main/java/category/CategoryUseCase.java
@@ -13,7 +13,6 @@ public class CategoryUseCase {
 	}
 
 	public void addCategory(CategoryName name) {
-
 		var id = this.categoryIdGenerator.generateId();
 		this.categoryRepository.add(new Category(name, id));
 	}
diff --git a/2-Application/src/main/java/category/RandomCategoryIdGenerator.java b/2-Application/src/main/java/category/RandomCategoryIdGenerator.java
new file mode 100644
index 0000000..6f353bb
--- /dev/null
+++ b/2-Application/src/main/java/category/RandomCategoryIdGenerator.java
@@ -0,0 +1,20 @@
+package category;
+
+public class RandomCategoryIdGenerator implements CategoryIdGenerator {
+
+	private final CategoryRepository categoryRepository;
+
+	public RandomCategoryIdGenerator(CategoryRepository categoryRepository) {
+		this.categoryRepository = categoryRepository;
+	}
+
+	@Override
+	public CategoryId generateId() {
+		var randomID = (int) (Math.random() * 10000);
+
+		if (categoryRepository.getById(new CategoryId(randomID)).isPresent()) {
+			return generateId();
+		}
+		return new CategoryId(randomID);
+	}
+}
diff --git a/2-Application/src/main/java/link/LinkUseCase.java b/2-Application/src/main/java/link/LinkUseCase.java
index c6c8ffc..88c1f77 100644
--- a/2-Application/src/main/java/link/LinkUseCase.java
+++ b/2-Application/src/main/java/link/LinkUseCase.java
@@ -41,7 +41,6 @@ public class LinkUseCase {
 		var link = new Link(id, creator, url, categoryIds, tags);
 
 		linkRepository.add(link);
-
 	}
 
 }
diff --git a/2-Application/src/main/java/link/RandomLinkIdGenerator.java b/2-Application/src/main/java/link/RandomLinkIdGenerator.java
new file mode 100644
index 0000000..f9f34f3
--- /dev/null
+++ b/2-Application/src/main/java/link/RandomLinkIdGenerator.java
@@ -0,0 +1,19 @@
+package link;
+
+public class RandomLinkIdGenerator implements LinkIdGenerator {
+	private final LinkRepository linkRepository;
+
+	public RandomLinkIdGenerator(LinkRepository linkRepository) {
+		this.linkRepository = linkRepository;
+	}
+
+	@Override
+	public LinkId generateId() {
+		var randomID = (int) (Math.random() * 10000);
+
+		if (linkRepository.getById(new LinkId(randomID)).isPresent()) {
+			return generateId();
+		}
+		return new LinkId(randomID);
+	}
+}