Move {Pro, Storage}::connect into Manager

As part of the connection refactoring, this patch moves the connect
methods of the Pro and Storage structs into the Manager struct.  To
maintain compatibility with nitrokey-test, the old methods are not
removed but marked as deprecated.

4 files changed, 75 insertions, 18 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ffc52e6..41b529a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -44,7 +44,7 @@ SPDX-License-Identifier: MIT
 - Refactor connection management:
   - Add `ConcurrentAccessError` and `PoisonError` `Error` variants.
   - Add the `Manager` struct that manages connections to Nitrokey devices.
-  - Deprecate the `connect` function.
+  - Deprecate `connect`, `Pro::connect` and `Storage::connect`.
   - Remove the `connect_model` function.
 
 # v0.3.4 (2019-01-20)
diff --git a/src/device.rs b/src/device.rs
index f28558d..758691d 100644
--- a/src/device.rs
+++ b/src/device.rs
@@ -9,7 +9,7 @@ use nitrokey_sys;
 
 use crate::auth::Authenticate;
 use crate::config::{Config, RawConfig};
-use crate::error::{CommunicationError, Error};
+use crate::error::Error;
 use crate::otp::GenerateOtp;
 use crate::pws::GetPasswordSafe;
 use crate::util::{
@@ -755,16 +755,12 @@ impl Pro {
     /// ```
     ///
     /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected
+    #[deprecated(since = "0.4.0", note = "use `nitrokey::Manager::connect_pro` instead")]
     pub fn connect() -> Result<Pro, Error> {
-        // TODO: maybe Option instead of Result?
-        if connect_enum(Model::Pro) {
-            Ok(Pro::new())
-        } else {
-            Err(CommunicationError::NotConnected.into())
-        }
+        crate::take()?.connect_pro().map_err(Into::into)
     }
 
-    fn new() -> Pro {
+    pub(crate) fn new() -> Pro {
         Pro {
             marker: marker::PhantomData,
         }
@@ -808,16 +804,15 @@ impl Storage {
     /// ```
     ///
     /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected
+    #[deprecated(
+        since = "0.4.0",
+        note = "use `nitrokey::Manager::connect_storage` instead"
+    )]
     pub fn connect() -> Result<Storage, Error> {
-        // TODO: maybe Option instead of Result?
-        if connect_enum(Model::Storage) {
-            Ok(Storage::new())
-        } else {
-            Err(CommunicationError::NotConnected.into())
-        }
+        crate::take()?.connect_storage().map_err(Into::into)
     }
 
-    fn new() -> Storage {
+    pub(crate) fn new() -> Storage {
         Storage {
             marker: marker::PhantomData,
         }
diff --git a/src/lib.rs b/src/lib.rs
index 784dc6f..dc3432a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -246,6 +246,68 @@ impl Manager {
             Err(CommunicationError::NotConnected.into())
         }
     }
+
+    /// Connects to a Nitrokey Pro.
+    ///
+    /// # Errors
+    ///
+    /// - [`NotConnected`][] if no Nitrokey device of the given model is connected
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use nitrokey::Pro;
+    ///
+    /// fn use_pro(device: Pro) {}
+    ///
+    /// # fn main() -> Result<(), nitrokey::Error> {
+    /// match nitrokey::take()?.connect_pro() {
+    ///     Ok(device) => use_pro(device),
+    ///     Err(err) => println!("Could not connect to the Nitrokey Pro: {}", err),
+    /// }
+    /// #     Ok(())
+    /// # }
+    /// ```
+    ///
+    /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected
+    pub fn connect_pro(&mut self) -> Result<Pro, Error> {
+        if device::connect_enum(device::Model::Pro) {
+            Ok(device::Pro::new())
+        } else {
+            Err(CommunicationError::NotConnected.into())
+        }
+    }
+
+    /// Connects to a Nitrokey Storage.
+    ///
+    /// # Errors
+    ///
+    /// - [`NotConnected`][] if no Nitrokey device of the given model is connected
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use nitrokey::Storage;
+    ///
+    /// fn use_storage(device: Storage) {}
+    ///
+    /// # fn main() -> Result<(), nitrokey::Error> {
+    /// match nitrokey::take()?.connect_storage() {
+    ///     Ok(device) => use_storage(device),
+    ///     Err(err) => println!("Could not connect to the Nitrokey Storage: {}", err),
+    /// }
+    /// #     Ok(())
+    /// # }
+    /// ```
+    ///
+    /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected
+    pub fn connect_storage(&mut self) -> Result<Storage, Error> {
+        if device::connect_enum(Model::Storage) {
+            Ok(Storage::new())
+        } else {
+            Err(CommunicationError::NotConnected.into())
+        }
+    }
 }
 
 /// Take an instance of the connection manager, blocking until an instance is available.
diff --git a/tests/device.rs b/tests/device.rs
index 527d6f2..b377f2e 100644
--- a/tests/device.rs
+++ b/tests/device.rs
@@ -60,7 +60,7 @@ fn connect_pro(device: Pro) {
 
     assert_any_ok!(nitrokey::connect());
     assert_any_ok!(nitrokey::take().unwrap().connect_model(nitrokey::Model::Pro));
-    assert_any_ok!(nitrokey::Pro::connect());
+    assert_any_ok!(nitrokey::take().unwrap().connect_pro());
 }
 
 #[test_device]
@@ -70,7 +70,7 @@ fn connect_storage(device: Storage) {
 
     assert_any_ok!(nitrokey::connect());
     assert_any_ok!(nitrokey::take().unwrap().connect_model(nitrokey::Model::Storage));
-    assert_any_ok!(nitrokey::Storage::connect());
+    assert_any_ok!(nitrokey::take().unwrap().connect_storage());
 }
 
 fn assert_empty_serial_number() {