refactor: migrate from mod.rs to named module files

src/system/keys.rs

@@ -0,0 +1,69 @@
+//! ## KeyStorage
+//!
+//! `keystorage` provides the trait to manipulate to a KeyStorage
+
+// Storages
+pub mod filestorage;
+pub mod keyringstorage;
+// ext
+use keyring::Error as KeyringError;
+use thiserror::Error;
+
+/// defines the error type for the `KeyStorage`
+#[derive(Debug, Error)]
+pub enum KeyStorageError {
+    #[error("Key has a bad syntax")]
+    BadSyntax,
+    #[error("Provider service error")]
+    ProviderError,
+    #[error("No such key")]
+    NoSuchKey,
+    #[error("keyring error: {0}")]
+    KeyringError(KeyringError),
+}
+
+impl From<KeyringError> for KeyStorageError {
+    fn from(e: KeyringError) -> Self {
+        Self::KeyringError(e)
+    }
+}
+
+/// this traits provides the methods to communicate and interact with the key storage.
+pub trait KeyStorage {
+    /// Retrieve key from the key storage.
+    /// The key might be acccess through an identifier, which identifies
+    /// the key in the storage
+    fn get_key(&self, storage_id: &str) -> Result<String, KeyStorageError>;
+
+    /// Set the key into the key storage
+    fn set_key(&self, storage_id: &str, key: &str) -> Result<(), KeyStorageError>;
+
+    /// is_supported
+    ///
+    /// Returns whether the key storage is supported on the host system
+    fn is_supported(&self) -> bool;
+}
+
+#[cfg(test)]
+mod tests {
+
+    use pretty_assertions::assert_eq;
+
+    use super::*;
+
+    #[test]
+    fn test_system_keys_mod_errors() {
+        assert_eq!(
+            KeyStorageError::BadSyntax.to_string(),
+            String::from("Key has a bad syntax")
+        );
+        assert_eq!(
+            KeyStorageError::ProviderError.to_string(),
+            String::from("Provider service error")
+        );
+        assert_eq!(
+            KeyStorageError::NoSuchKey.to_string(),
+            String::from("No such key")
+        );
+    }
+}