input/tidal: new input plugin to receive Tidal streams

src/input/plugins/TidalTrackRequest.hxx

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2003-2018 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef TIDAL_TRACK_REQUEST_HXX
+#define TIDAL_TRACK_REQUEST_HXX
+
+#include "check.h"
+#include "lib/curl/Handler.hxx"
+#include "lib/curl/Slist.hxx"
+#include "lib/curl/Request.hxx"
+#include "lib/yajl/Handle.hxx"
+
+#include <exception>
+#include <string>
+
+class CurlRequest;
+
+class TidalTrackHandler
+	: public boost::intrusive::list_base_hook<boost::intrusive::link_mode<boost::intrusive::safe_link>>
+{
+public:
+	virtual void OnTidalTrackSuccess(std::string &&url) noexcept = 0;
+	virtual void OnTidalTrackError(std::exception_ptr error) noexcept = 0;
+};
+
+class TidalTrackRequest final : CurlResponseHandler {
+	CurlSlist request_headers;
+
+	CurlRequest request;
+
+	Yajl::Handle parser;
+
+	enum class State {
+		NONE,
+		URLS,
+	} state = State::NONE;
+
+	std::string url;
+
+	std::exception_ptr error;
+
+	TidalTrackHandler &handler;
+
+public:
+	TidalTrackRequest(CurlGlobal &curl,
+			  const char *base_url, const char *token,
+			  const char *session,
+			  const char *track_id,
+			  TidalTrackHandler &_handler) noexcept;
+
+	~TidalTrackRequest() noexcept;
+
+private:
+	/* virtual methods from CurlResponseHandler */
+	void OnHeaders(unsigned status,
+		       std::multimap<std::string, std::string> &&headers) override;
+	void OnData(ConstBuffer<void> data) override;
+	void OnEnd() override;
+	void OnError(std::exception_ptr e) noexcept override;
+
+public:
+	/* yajl callbacks */
+	bool String(StringView value) noexcept;
+	bool MapKey(StringView value) noexcept;
+	bool EndMap() noexcept;
+};
+
+#endif