update.{cc,h} -> update_checker.{cc,h}.

1 files changed, 213 insertions, 0 deletions

diff --git a/src/lib/update_checker.cc b/src/lib/update_checker.cc
new file mode 100644
index 000000000..634328e6a
--- /dev/null
+++ b/src/lib/update_checker.cc
@@ -0,0 +1,213 @@
+/*
+    Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "update_checker.h"
+#include "version.h"
+#include "safe_stringstream.h"
+#include "config.h"
+#include "util.h"
+#include "raw_convert.h"
+#include <libcxml/cxml.h>
+#include <curl/curl.h>
+#include <boost/algorithm/string.hpp>
+#include <string>
+
+#define BUFFER_SIZE 1024
+
+using std::cout;
+using std::min;
+using std::string;
+using std::vector;
+using boost::is_any_of;
+using boost::ends_with;
+
+/** Singleton instance */
+UpdateChecker* UpdateChecker::_instance = 0;
+
+static size_t
+write_callback_wrapper (void* data, size_t size, size_t nmemb, void* user)
+{
+	return reinterpret_cast<UpdateChecker*>(user)->write_callback (data, size, nmemb);
+}
+
+/** Construct an UpdateChecker.  This sets things up and starts a thread to
+ *  do the work.
+ */
+UpdateChecker::UpdateChecker ()
+	: _buffer (new char[BUFFER_SIZE])
+	, _offset (0)
+	, _curl (0)
+	, _state (NOT_RUN)
+	, _emits (0)
+	, _to_do (0)
+{
+	_curl = curl_easy_init ();
+
+	curl_easy_setopt (_curl, CURLOPT_URL, "http://dcpomatic.com/update");
+	curl_easy_setopt (_curl, CURLOPT_WRITEFUNCTION, write_callback_wrapper);
+	curl_easy_setopt (_curl, CURLOPT_WRITEDATA, this);
+	curl_easy_setopt (_curl, CURLOPT_TIMEOUT, 20);
+
+	string const agent = "dcpomatic/" + string (dcpomatic_version);
+	curl_easy_setopt (_curl, CURLOPT_USERAGENT, agent.c_str ());
+
+	_thread = new boost::thread (boost::bind (&UpdateChecker::thread, this));
+}
+
+UpdateChecker::~UpdateChecker ()
+{
+	/* We are not cleaning up our thread, but hey well */
+
+	curl_easy_cleanup (_curl);
+	delete[] _buffer;
+}
+
+/** Start running the update check */
+void
+UpdateChecker::run ()
+{
+	boost::mutex::scoped_lock lm (_process_mutex);
+	_to_do++;
+	_condition.notify_one ();
+}
+
+void
+UpdateChecker::thread ()
+{
+	while (true) {
+		/* Block until there is something to do */
+		boost::mutex::scoped_lock lock (_process_mutex);
+		while (_to_do == 0) {
+			_condition.wait (lock);
+		}
+		--_to_do;
+		lock.unlock ();
+
+		try {
+			_offset = 0;
+
+			/* Perform the request */
+
+			int r = curl_easy_perform (_curl);
+			if (r != CURLE_OK) {
+				set_state (FAILED);
+				return;
+			}
+
+			/* Parse the reply */
+
+			_buffer[_offset] = '\0';
+			string s (_buffer);
+			cxml::Document doc ("Update");
+			doc.read_string (s);
+
+			/* Read the current stable and test version numbers */
+
+			string stable;
+			string test;
+
+			{
+				boost::mutex::scoped_lock lm (_data_mutex);
+				stable = doc.string_child ("Stable");
+				test = doc.string_child ("Test");
+			}
+
+			if (version_less_than (dcpomatic_version, stable)) {
+				_stable = stable;
+			}
+
+			if (Config::instance()->check_for_test_updates() && version_less_than (dcpomatic_version, test)) {
+				_test = test;
+			}
+
+			if (_stable || _test) {
+				set_state (YES);
+			} else {
+				set_state (NO);
+			}
+		} catch (...) {
+			set_state (FAILED);
+		}
+	}
+}
+
+size_t
+UpdateChecker::write_callback (void* data, size_t size, size_t nmemb)
+{
+	size_t const t = min (size * nmemb, size_t (BUFFER_SIZE - _offset - 1));
+	memcpy (_buffer + _offset, data, t);
+	_offset += t;
+	return t;
+}
+
+void
+UpdateChecker::set_state (State s)
+{
+	{
+		boost::mutex::scoped_lock lm (_data_mutex);
+		_state = s;
+		_emits++;
+	}
+
+	emit (boost::bind (boost::ref (StateChanged)));
+}
+
+UpdateChecker *
+UpdateChecker::instance ()
+{
+	if (!_instance) {
+		_instance = new UpdateChecker ();
+	}
+
+	return _instance;
+}
+
+bool
+UpdateChecker::version_less_than (string const & a, string const & b)
+{
+	vector<string> ap;
+	split (ap, a, is_any_of ("."));
+	vector<string> bp;
+	split (bp, b, is_any_of ("."));
+
+	DCPOMATIC_ASSERT (ap.size() == 3 && bp.size() == 3);
+
+	if (ap[0] != bp[0]) {
+		return raw_convert<int> (ap[0]) < raw_convert<int> (bp[0]);
+	}
+
+	if (ap[1] != bp[1]) {
+		return raw_convert<int> (ap[1]) < raw_convert<int> (bp[1]);
+	}
+	float am;
+	if (ends_with (ap[2], "devel")) {
+		am = raw_convert<int> (ap[2].substr (0, ap[2].length() - 5)) + 0.5;
+	} else {
+		am = raw_convert<int> (ap[2]);
+	}
+
+	float bm;
+	if (ends_with (bp[2], "devel")) {
+		bm = raw_convert<int> (bp[2].substr (0, bp[2].length() - 5)) + 0.5;
+	} else {
+		bm = raw_convert<int> (bp[2]);
+	}
+
+	return am < bm;
+}