wallet2_api: add updates check api

src/wallet/api/wallet_manager.cpp

@@ -33,11 +33,16 @@
 #include "wallet.h"
 #include "common_defines.h"
 #include "common/dns_utils.h"
+#include "common/util.h"
+#include "common/updates.h"
+#include "version.h"
 #include "net/http_client.h"
 
 #include <boost/filesystem.hpp>
 #include <boost/regex.hpp>
 
+#undef MONERO_DEFAULT_LOG_CATEGORY
+#define MONERO_DEFAULT_LOG_CATEGORY "WalletAPI"
 
 namespace epee {
     unsigned int g_test_dbg_lock_sleep = 0;
@@ -443,6 +448,29 @@ std::string WalletManagerImpl::resolveOpenAlias(const std::string &address, bool
     return addresses.front();
 }
 
+std::tuple<bool, std::string, std::string, std::string, std::string> WalletManager::checkUpdates(const std::string &software, const std::string &subdir)
+{
+#ifdef BUILD_TAG
+    static const char buildtag[] = BOOST_PP_STRINGIZE(BUILD_TAG);
+#else
+    static const char buildtag[] = "source";
+#endif
+
+    std::string version, hash;
+    MDEBUG("Checking for a new " << software << " version for " << buildtag);
+    if (!tools::check_updates(software, buildtag, version, hash))
+      return std::make_tuple(false, "", "", "", "");
+
+    if (tools::vercmp(version.c_str(), MONERO_VERSION) > 0)
+    {
+      std::string user_url = tools::get_update_url(software, subdir, buildtag, version, true);
+      std::string auto_url = tools::get_update_url(software, subdir, buildtag, version, false);
+      MGINFO("Version " << version << " of " << software << " for " << buildtag << " is available: " << user_url << ", SHA256 hash " << hash);
+      return std::make_tuple(true, version, hash, user_url, auto_url);
+    }
+    return std::make_tuple(false, "", "", "", "");
+}
+
 
 ///////////////////// WalletManagerFactory implementation //////////////////////
 WalletManager *WalletManagerFactory::getWalletManager()

src/wallet/wallet2_api.h

@@ -703,6 +703,9 @@ struct WalletManager
 
     //! resolves an OpenAlias address to a monero address
     virtual std::string resolveOpenAlias(const std::string &address, bool &dnssec_valid) const = 0;
+
+    //! checks for an update and returns version, hash and url
+    static std::tuple<bool, std::string, std::string, std::string, std::string> checkUpdates(const std::string &software, const std::string &subdir);
 };