127 lines
4.7 KiB
C#
127 lines
4.7 KiB
C#
//
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// GoogleHelpers.cs
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//
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// Author:
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// Paul Schneider <paul@pschneider.fr>
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//
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// Copyright (c) 2015 GNU GPL
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.Data.Entity;
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using Microsoft.AspNet.Identity.EntityFramework;
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using Google.Apis.Auth.OAuth2;
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using Google.Apis.Services;
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using Google.Apis.Compute.v1;
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using Google.Apis.Auth.OAuth2.Flows;
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using Google.Apis.Util.Store;
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using Google.Apis.Auth.OAuth2.Responses;
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using Google.Apis.Util;
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namespace Yavsc.Helpers
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{
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using Models;
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using Models.Calendar;
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using Services;
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using Server.Helpers;
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/// <summary>
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/// Google helpers.
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/// </summary>
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public static class GoogleHelpers
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{
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public static async Task<GoogleCredential> GetCredentialForApi(IEnumerable<string> scopes)
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{
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GoogleCredential credential = await GoogleCredential.GetApplicationDefaultAsync();
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var baseClientService = new BaseClientService.Initializer()
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{
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HttpClientInitializer = credential
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};
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var compute = new ComputeService(new BaseClientService.Initializer()
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{
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HttpClientInitializer = credential
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});
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if (credential.IsCreateScopedRequired)
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{
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credential = credential.CreateScoped(scopes);
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}
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return credential;
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}
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public static async Task<IdentityUserLogin<string>> GetGoogleUserLoginAsync(
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this ApplicationDbContext context,
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string yavscUserId)
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{
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var user = context.Users.FirstOrDefaultAsync(u=>u.Id==yavscUserId);
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if (user==null) return null;
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var googleLogin = await context.UserLogins.FirstOrDefaultAsync(
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x => x.UserId == yavscUserId && x.LoginProvider == "Google"
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);
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return googleLogin;
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}
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public static async Task<UserCredential> GetGoogleCredential(GoogleAuthSettings googleAuthSettings, IDataStore store, string googleUserLoginKey)
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{
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if (string.IsNullOrEmpty(googleUserLoginKey))
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throw new InvalidOperationException("No Google login");
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var flow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer());
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var token = await store.GetAsync<TokenResponse>(googleUserLoginKey);
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// token != null
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var c = SystemClock.Default;
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if (token.IsExpired(c)) {
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token = await RefreshToken(googleAuthSettings, token);
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}
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return new UserCredential(flow, googleUserLoginKey, token);
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}
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public static async Task<Period[]> GetFreeTime (this ICalendarManager manager, string calId, DateTime startDate, DateTime endDate)
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{
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var evlist = await manager.GetCalendarAsync(calId, startDate, endDate, null) ;
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var result = evlist.Items
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.Where(
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ev => ev.Transparency == "transparent"
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)
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.Select(
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ev => new Period {
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Start = ev.Start.DateTime.Value,
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End = ev.End.DateTime.Value
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}
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);
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return result.ToArray();
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}
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public static async Task<TokenResponse> RefreshToken(this GoogleAuthSettings settings, TokenResponse oldResponse)
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{
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string ep = " https://www.googleapis.com/oauth2/v4/token";
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// refresh_token client_id client_secret grant_type=refresh_token
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try {
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using (var m = new SimpleJsonPostMethod(ep)) {
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return await m.Invoke<TokenResponse>(
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new { refresh_token= oldResponse.RefreshToken, client_id=Startup.GoogleWebClientConfiguration["web:client_id"],
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client_secret=Startup.GoogleWebClientConfiguration["web:client_secret"],
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grant_type="refresh_token" }
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);
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}
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}
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catch (Exception ex) {
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throw new Exception ("No refresh token for Google service account",ex);
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}
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}
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}
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}
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