feat: add CipherContext struct

cipher-factory/src/context.rs

@@ -0,0 +1,32 @@
+use crate::{Algorithm, OperationChoice, OutputFormat};
+use cipher_core::{BlockCipher, CipherResult};
+
+pub struct CipherContext {
+    pub algorithm: Algorithm,
+    pub operation: OperationChoice,
+    pub key: String,
+    pub input_text: String,
+    pub output_format: OutputFormat,
+}
+
+impl CipherContext {
+    pub fn process(&self) -> CipherResult<String> {
+        let text_bytes = self.algorithm.parse_text(&self.input_text)?;
+        let cipher = self.algorithm.new_cipher(&self.key)?;
+        self.execute(cipher.as_ref(), &text_bytes)
+    }
+
+    fn execute(&self, cipher: &dyn BlockCipher, text_bytes: &[u8]) -> CipherResult<String> {
+        match self.operation {
+            OperationChoice::Encrypt => {
+                let ciphertext = cipher.encrypt(text_bytes)?;
+                Ok(format!("{ciphertext:X}"))
+            }
+            OperationChoice::Decrypt => {
+                let plaintext = cipher.decrypt(text_bytes)?;
+                let output = self.output_format.to_string(&plaintext);
+                Ok(output)
+            }
+        }
+    }
+}

cipher-factory/src/lib.rs

@@ -1,5 +1,8 @@
 mod algorithm;
+mod context;
 mod operation;
 mod output;
 
-pub use {algorithm::Algorithm, operation::OperationChoice, output::OutputFormat};
+pub use {
+    algorithm::Algorithm, context::CipherContext, operation::OperationChoice, output::OutputFormat,
+};