Add existing oauth2Token support (#32)

Some services (as Alexa skills) manage the authentication and just provide the app oauth2 token.
I added the oauth2 existing token support in "generate token" process.

Author: jobam

src/Netatmo.Tests/CredentialManager.cs

@@ -59,6 +59,29 @@ await sut.GenerateToken("username@email.com", "p@$$W0rd",
             token.AccessToken.Should().Be(expectedToken.access_token);
             token.RefreshToken.Should().Be(expectedToken.refresh_token);
             token.ExpiresAt.Should().Be(token.ReceivedAt.Plus(Duration.FromSeconds(expectedToken.expires_in)));
+        }     
+        
+        [Fact]
+        public void ProvideOAuth2Token_Should_Provide_Token_From_Existing()
+        {
+            var expectedToken = new
+            {
+                access_token = "2YotnFZFEjr1zCsicMWpAA",
+                expires_in = 20
+            };
+
+            httpTest.RespondWithJson(expectedToken);
+
+            var sut = new Netatmo.CredentialManager("https://api.netatmo.com/", "clientId", "clientSecret", SystemClock.Instance);
+
+            sut.ProvideOAuth2Token(expectedToken.access_token);
+
+            var token = sut.CredentialToken;
+
+            token.Should().BeOfType<CredentialToken>();
+            token.AccessToken.Should().Be(expectedToken.access_token);
+            token.RefreshToken.Should().BeNull();
+            token.ExpiresAt.Should().Be(token.ReceivedAt.Plus(Duration.FromSeconds(expectedToken.expires_in)));
         }
 
         [Fact]
@@ -105,4 +128,4 @@ public async Task RefreshToken_Should_Refresh_Token()
             refreshedToken.Should().NotBe(oldToken);
         }
     }
-}
+}

src/Netatmo/Client.cs

@@ -22,6 +22,11 @@ public Task GenerateToken(string username, string password, Scope[] scopes = nul
         {
             return CredentialManager.GenerateToken(username, password, scopes);
         }
+        
+        public void ProvideOAuth2Token(string oauth2Token)
+        {
+            CredentialManager.ProvideOAuth2Token(oauth2Token);
+        }
 
         public Task RefreshToken()
         {

src/Netatmo/CredentialManager.cs

@@ -8,6 +8,8 @@
 
 namespace Netatmo
 {
+    using System;
+
     public class CredentialManager : ICredentialManager
     {
         private readonly string baseUrl;
@@ -44,6 +46,18 @@ public async Task GenerateToken(string username, string password, Scope[] scopes
             CredentialToken = new CredentialToken(token, clock);
         }
 
+        public void ProvideOAuth2Token(string oauth2Token)
+        {
+            var appToken = new Token()
+            {
+                AccessToken = oauth2Token,
+                RefreshToken = null,
+                ExpiresIn = 20
+            };
+
+            CredentialToken = new CredentialToken(appToken, clock);
+        }
+
         public async Task RefreshToken()
         {
             // TODO : Handle not success status codes (rate limit exceeded, api down, ect)
@@ -58,4 +72,4 @@ public async Task RefreshToken()
             CredentialToken = new CredentialToken(token, clock);
         }
     }
-}
+}

src/Netatmo/IClient.cs

@@ -9,6 +9,7 @@ public interface IClient
         IAirClient Air { get; }
         ICredentialManager CredentialManager { get; }
         Task GenerateToken(string username, string password, Scope[] scopes = null);
+        void ProvideOAuth2Token(string oauth2Token);
         Task RefreshToken();
     }
 }

src/Netatmo/ICredentialManager.cs

@@ -8,6 +8,7 @@ public interface ICredentialManager
         CredentialToken CredentialToken { get; }
         string AccessToken { get; }
         Task GenerateToken(string username, string password, Scope[] scopes = null);
+        void ProvideOAuth2Token(string oauth2Token);
         Task RefreshToken();
     }
-}
+}

src/Netatmo/Netatmo.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <Version>1.3.1</Version>
+        <Version>1.3.2</Version>
         <TargetFrameworks>netcoreapp2.2;netcoreapp2.1;netstandard2.0</TargetFrameworks>
         <PackageId>Netatmo</PackageId>
         <Authors>Luc FASQUELLE</Authors>