refactor: replace let-else with ok_or_else

src/rust/zh.copymanga/src/decryptor.rs

@@ -19,15 +19,12 @@ pub trait EncryptedString {
 impl EncryptedString for String {
 	fn decrypt(self) -> Result<Self> {
 		let encrypted_data = self.as_bytes();
-		// let iv = &encrypted_data[..16];
-		let Some(iv) = encrypted_data.get(..16) else {
-			return Err(to_aidoku_error("Failed to get `iv` from `encrypted_data`"));
-		};
-		let Some(hex_ciphertext) = encrypted_data.get(16..) else {
-			return Err(to_aidoku_error(
-				"Failed to get `hex_ciphertext` from `encrypted_data`",
-			));
-		};
+		let iv = encrypted_data
+			.get(..16)
+			.ok_or_else(|| to_aidoku_error("Failed to get `iv` from `encrypted_data`"))?;
+		let hex_ciphertext = encrypted_data.get(16..).ok_or_else(|| {
+			to_aidoku_error("Failed to get `hex_ciphertext` from `encrypted_data`")
+		})?;
 		let mut ciphertext = hex::decode(hex_ciphertext).map_err(to_aidoku_error)?;
 
 		let plaintext = Aes128CbcDec::new(KEY.into(), iv.into())

src/rust/zh.copymanga/src/parser.rs

@@ -161,13 +161,11 @@ pub trait UuidString {
 
 impl UuidString for String {
 	fn get_timestamp(&self) -> Result<f64> {
-		let Some(timestamp) = Uuid::from_str(self)
+		let (integer_part, fractional_part) = Uuid::from_str(self)
 			.map_err(to_aidoku_error)?
 			.get_timestamp()
-		else {
-			return Err(to_aidoku_error("Failed to parse UUID to timestamp."));
-		};
-		let (integer_part, fractional_part) = timestamp.to_unix();
+			.ok_or_else(|| to_aidoku_error("Failed to parse UUID to timestamp."))?
+			.to_unix();
 
 		Ok((integer_part as f64) + (fractional_part as f64 * 10e-10))
 	}