SaveTool: add rest of response handling.

src/SaveTool/SaveTool.cpp

@@ -32,6 +32,8 @@
 
 #include <cpr/cpr.h>
 
+#include <nlohmann/json.hpp>
+
 #include <windef.h>
 #include <winuser.h>
 #include <processthreadsapi.h>
@@ -303,6 +305,56 @@ void SaveTool::updateCheckEvent(SDL_Event& event) {
         _queue.addToast(Toast::Type::Error, Utility::formatString("The request failed with error code {}: {}", r.status_code, r.reason));
         return;
     }
+
+    using json = nlohmann::json;
+
+    json response = json::parse(r.text);
+
+    struct Version {
+        explicit Version(const std::string& str) {
+            std::size_t start_point = 0;
+
+            if(str[0] == 'v') {
+                start_point++;
+            }
+
+            major = std::atoi(str.c_str() + start_point);
+            start_point = str.find('.', start_point) + 1;
+            minor = std::atoi(str.c_str() + start_point);
+            start_point = str.find('.', start_point) + 1;
+            patch = std::atoi(str.c_str() + start_point);
+        }
+        Int major;
+        Int minor;
+        Int patch;
+
+        bool operator==(const Version& other) const {
+            return (major == other.major) && (minor == other.minor) && (patch == other.patch);
+        }
+        bool operator>(const Version& other) const {
+            return (      major * 10000 +       minor * 100 +       patch) >
+                   (other.major * 10000 + other.minor * 100 + other.patch);
+        }
+    };
+
+    static const Version current_ver{"0.9.9"};
+    Version latest_ver{response[0]["tag_name"]};
+
+    if(latest_ver == current_ver) {
+        _queue.addToast(Toast::Type::Success, "The application is already up to date.");
+    }
+    else if(latest_ver > current_ver) {
+        _queue.addToast(Toast::Type::Warning, "Your version is out of date.\nCheck the settings for more information.",
+                        std::chrono::milliseconds{5000});
+        _updateAvailable = true;
+        _latestVersion = Utility::formatString("{}.{}.{}", latest_ver.major, latest_ver.minor, latest_ver.patch);
+        _releaseLink = response[0]["html_url"];
+        _downloadLink = response[0]["assets"][0]["browser_download_url"];
+        Utility::Debug{} << _downloadLink.c_str();
+    }
+    else if(current_ver > latest_ver) {
+        _queue.addToast(Toast::Type::Warning, "Your version is more recent than the latest one in the repo. How???");
+    }
 }
 
 void SaveTool::initialiseConfiguration() {

src/SaveTool/SaveTool.h

@@ -199,4 +199,9 @@ class SaveTool: public Platform::Sdl2Application, public efsw::FileWatchListener
 
         bool _checkUpdatesOnStartup{true};
         bool _unsafeMode{false};
+
+        bool _updateAvailable{false};
+        std::string _latestVersion;
+        std::string _releaseLink;
+        std::string _downloadLink;
 };

src/SaveTool/SaveTool_drawMainMenu.cpp

@@ -67,6 +67,18 @@ void SaveTool::drawMainMenu() {
                     _thread = std::thread{[this]{ checkForUpdates(); }};
                 }
 
+                if(_updateAvailable) {
+                    ImGui::AlignTextToFramePadding();
+                    ImGui::Text("Version %s is available.", _latestVersion.c_str());
+                    if(ImGui::Button(ICON_FA_FILE_SIGNATURE " Release notes")) {
+                        openUri(_releaseLink);
+                    }
+                    ImGui::SameLine();
+                    if(ImGui::Button(ICON_FA_DOWNLOAD " Download now")) {
+                        openUri(_downloadLink);
+                    }
+                }
+
                 ImGui::EndMenu();
             }