src/input/plugins/QobuzClient.hxx

   1 /*
   2  * Copyright 2003-2018 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #ifndef QOBUZ_CLIENT_HXX
  21 #define QOBUZ_CLIENT_HXX
  22
  23 #include "check.h"
  24 #include "QobuzSession.hxx"
  25 #include "QobuzLoginRequest.hxx"
  26 #include "lib/curl/Init.hxx"
  27 #include "thread/Mutex.hxx"
  28 #include "event/DeferEvent.hxx"
  29
  30 #include <boost/intrusive/list.hpp>
  31
  32 #include <memory>
  33 #include <map>
  34 #include <string>
  35
  36 class QobuzSessionHandler
  37         : public boost::intrusive::list_base_hook<boost::intrusive::link_mode<boost::intrusive::safe_link>>
  38 {
  39 public:
  40         virtual void OnQobuzSession() noexcept = 0;
  41 };
  42
  43 class QobuzClient final : QobuzLoginHandler {
  44         const char *const base_url;
  45         const char *const app_id, *const app_secret;
  46         const char *const device_manufacturer_id;
  47         const char *const username, *const email, *const password;
  48         const char *const format_id;
  49
  50         CurlInit curl;
  51
  52         DeferEvent defer_invoke_handlers;
  53
  54         /**
  55          * Protects #session, #error, #login_request, #handlers.
  56          */
  57         mutable Mutex mutex;
  58
  59         QobuzSession session;
  60
  61         std::exception_ptr error;
  62
  63         typedef boost::intrusive::list<QobuzSessionHandler,
  64                                        boost::intrusive::constant_time_size<false>> LoginHandlerList;
  65
  66         LoginHandlerList handlers;
  67
  68         std::unique_ptr<QobuzLoginRequest> login_request;
  69
  70 public:
  71         QobuzClient(EventLoop &event_loop,
  72                     const char *_base_url,
  73                     const char *_app_id, const char *_app_secret,
  74                     const char *_device_manufacturer_id,
  75                     const char *_username, const char *_email,
  76                     const char *_password,
  77                     const char *_format_id);
  78
  79         const char *GetFormatId() const noexcept {
  80                 return format_id;
  81         }
  82
  83         gcc_pure
  84         CurlGlobal &GetCurl() noexcept;
  85
  86         void AddLoginHandler(QobuzSessionHandler &h) noexcept;
  87
  88         void RemoveLoginHandler(QobuzSessionHandler &h) noexcept {
  89                 const std::lock_guard<Mutex> protect(mutex);
  90                 if (h.is_linked())
  91                         handlers.erase(handlers.iterator_to(h));
  92         }
  93
  94         /**
  95          * Throws on error.
  96          */
  97         QobuzSession GetSession() const;
  98
  99         std::string MakeUrl(const char *object, const char *method,
 100                             const std::multimap<std::string, std::string> &query) const noexcept;
 101
 102         std::string MakeSignedUrl(const char *object, const char *method,
 103                                   const std::multimap<std::string, std::string> &query) const noexcept;
 104
 105 private:
 106         void StartLogin();
 107
 108         void InvokeHandlers() noexcept;
 109
 110         void ScheduleInvokeHandlers() noexcept {
 111                 defer_invoke_handlers.Schedule();
 112         }
 113
 114         /* virtual methods from QobuzLoginHandler */
 115         void OnQobuzLoginSuccess(QobuzSession &&session) noexcept override;
 116         void OnQobuzLoginError(std::exception_ptr error) noexcept override;
 117 };
 118
 119 #endif