Updated README.md

README.md

@@ -16,20 +16,125 @@ C# library which is used to extend the abilities of YouTube API v3
 - User's recommendations listing
 - User's subscriptions videos listing
 - Videos' URLs retrieval
+- UWP authorization helpers
 
 ## Get started
+- Download and install package from [NuGet](https://www.nuget.org/packages/ExtendedYouTubeAPI/)
+### Authorization (UWP)
+```
+using System;
+using Google.Apis.Auth.OAuth2;
+using YouTube.Authorization;
+using Windows.Security.Authentication.Web;
 
-## Contribution
-1. Clone repository
-2. Build "YouTube.API" project
-### Configuring tests
+...
+
+ClientSecrets secrets = new ClientSecrets	// Initialize your project secrets
+{
+	ClientId = "%CLIENT_ID%",
+	ClientSecret = "%CLIENT_SECRET%"
+}
+
+string[] scopes = new string[]			// Define scopes you wanna access
+{
+	Oauth2Service.Scope.UserinfoProfile,
+	Oauth2Service.Scope.UserinfoEmail,
+	YouTubeService.Scope.YoutubeForceSsl
+};
+
+Uri requestString = AuthorizationHelpers.FormQueryString(secrets, scopes);	// Generate authorization link
+
+WebAuthenticationResult result = await WebAuthenticationBroker.AuthenticateAsync(WebAuthenticationOptions.UseTitle, requestString, AuthorizationHelpers.Endpoint);	// Call authentication broker with generated query string and predefined endpoint. WebAuthenticationOptions.UseTitle is required
+
+if (result.ResponseStatus == WebAuthenticationStatus.Success)	// Process response
+{
+	string successCode = AuthorizationHelpers.ParseSuccessCode(result.ResponseData);	// Retrieve success code
+	YouTube.Authorization.UserCredential credential = await AuthorizationHelpers.ExchangeToken(ClientSecrets, successCode);	// Excahnge success token for UserCredential
+	
+	// Use UserCredential to create YouTube.ExtendedYouTubeService
+
+	// Save refresh token for future use. Recommended way: PasswordVault
+	PasswordVault passwordVault = new PasswordVault();
+	PasswordCredential tokenData = new PasswordCredential("%ANY_ID%", "%AUTHORIZED_USER_ID%", credential.Token.RefreshToken)
+	passwordVault.Add(tokenData);
+
+	// Update stored refresh token on renew
+	credential.RefreshTokenUpdated += (s, e) =>
+	{
+		tokenData.Password = credential.Token.RefreshToken
+	}
+}
+else
+{
+	// Do something
+}
+```
+### Service retrieval
+```
+using YouTube;
+using YouTube.Authorization;
+using Google.Apis.Services;
+
+...
+
+YouTubeExtendedService GetService(UserCredential credential = null)
+{
+	BaseClientService.Initializer initializer = new BaseClientService.Initializer
+	{
+		ApplicationName = "%APP_NAME%",
+		ApiKey = "%API_KEY%",		// In case there's no UserCredential and usage is anonymous
+		HttpClientInitializer = credential
+	};
+
+	ExtendedYouTubeService service = new ExtendedYouTubeService(initializer);
+
+	returnt service
+}
+```
+
+### DASH manifest retrieval
+```
+using YouTube;
+using YouTube.Models;
+using System.Collections.Generic;
+using Windows.Media.Playback;
+
+...
+
+ExtendedYouTubeService service = new ExtendedYouTubeService();	// Get the Service
+var request = service.DashManifests.List("%VIDEO_ID%");
+// request.Id = "%VIDEO_ID%";	// Change video ID after request initialization
+
+IReadOnlyList<DashManifest> manifests = await request.ExecuteAsync();	// Execute request. There will be manifests for all available qualities, including "Auto"
+
+// DashManifest.Label - Quality label
+// DashManifest.ValidUntil - After this date URLs in the manifest will be invalid
+// DashManifest.Xml - XmlDocument instance of the manifest
+
+Uri manifestUri = manifests[0].WriteManifest(TempFileStream);	// Save manifest to temporary file to access it with MediaPlayer
+
+...
+
+// Play video with manifest
+MediaPlayer mediaPlayer = new MediaPlayer();
+mediaPlayer.Source = MediaSource.CreateFromUri(manifestUri);
+mediaPlayer.Play();
+```
+
+### Other data
+Other resources are retrieved pretty much the same as in the vanilia library
 
 ## TODO
 - Create API Reference page
 - Document code
-- Complete README
 - Setup CI/CD
-- Complete library
+- Add more tests
+- Implement user history management
+- Implement search history management
+- Implement video recommendations/subscirptions listing
+
+## Special thanks
+- [Tyrrrz](https://github.com/Tyrrrz) for [YoutubeExplode](https://github.com/Tyrrrz/YoutubeExplode) library which is used in the my one
 
 ## Copyrights
-> ©2019 Michael "XFox" Gordeev
+> ©2020 Michael "XFox" Gordeev