From 7a3d24a382940502a55a47c4981ad160ee6175e4 Mon Sep 17 00:00:00 2001
From: vbetsch <vic.betsch@gmail.com>
Date: Thu, 9 Apr 2026 20:45:53 +0200
Subject: [PATCH 1/3] test: should encrypt hello or world

---
 tests/cypher.test.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/cypher.test.ts b/tests/cypher.test.ts
index e7abc60..0951aa1 100644
--- a/tests/cypher.test.ts
+++ b/tests/cypher.test.ts
@@ -14,4 +14,12 @@ describe('Cypher', () => {
     const cypher: Cypher = new Cypher();
     expect(cypher.decrypt('ldga(')).toBe('world');
   });
+  it('should encrypt hello', () => {
+    const cypher: Cypher = new Cypher();
+    expect(cypher.encrypt('hello')).toBe('&£aad');
+  });
+  it('should encrypt world', () => {
+    const cypher: Cypher = new Cypher();
+    expect(cypher.encrypt('world')).toBe('ldga(');
+  });
 });

From adf250afe49d1b1955381d773fa5fa2b4ecbd14a Mon Sep 17 00:00:00 2001
From: vbetsch <vic.betsch@gmail.com>
Date: Thu, 9 Apr 2026 20:46:43 +0200
Subject: [PATCH 2/3] feat: add encrypt function

---
 src/cypher.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/cypher.ts b/src/cypher.ts
index 9edd931..4a5a722 100644
--- a/src/cypher.ts
+++ b/src/cypher.ts
@@ -65,4 +65,14 @@ export class Cypher {
     }
     return result;
   }
+
+  public encrypt(message: string): string {
+    let result: string = '';
+    for (let i = 0; i < message.length; i++) {
+      const char: string = message.charAt(i);
+      const index: number = this._alphabet.indexOf(char);
+      result += this._decryptionKey[index];
+    }
+    return result;
+  }
 }

From 3cd7e7f3f8be0e350b03a6e182189111e7371c15 Mon Sep 17 00:00:00 2001
From: vbetsch <vic.betsch@gmail.com>
Date: Thu, 9 Apr 2026 20:49:41 +0200
Subject: [PATCH 3/3] refactor: create translate function

---
 src/cypher.ts | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/src/cypher.ts b/src/cypher.ts
index 4a5a722..eec8389 100644
--- a/src/cypher.ts
+++ b/src/cypher.ts
@@ -56,23 +56,21 @@ export class Cypher {
     'o',
   ];
 
-  public decrypt(message: string): string {
+  private _translate(dictSource: string[], dictTarget: string[], message: string): string {
     let result: string = '';
     for (let i = 0; i < message.length; i++) {
       const char: string = message.charAt(i);
-      const index: number = this._decryptionKey.indexOf(char);
-      result += this._alphabet[index];
+      const index: number = dictSource.indexOf(char);
+      result += dictTarget[index];
     }
     return result;
   }
 
+  public decrypt(message: string): string {
+    return this._translate(this._decryptionKey, this._alphabet, message);
+  }
+
   public encrypt(message: string): string {
-    let result: string = '';
-    for (let i = 0; i < message.length; i++) {
-      const char: string = message.charAt(i);
-      const index: number = this._alphabet.indexOf(char);
-      result += this._decryptionKey[index];
-    }
-    return result;
+    return this._translate(this._alphabet, this._decryptionKey, message);
   }
 }