add reload to DeckLoader

cockatrice/src/interface/deck_loader/deck_loader.cpp

@@ -91,6 +91,22 @@ void DeckLoader::loadFromFileAsync(const QString &fileName, DeckFileFormat::Form
     });
 }
 
+bool DeckLoader::reload()
+{
+    QString lastFileName = loadedDeck.lastLoadInfo.fileName;
+    if (lastFileName.isEmpty()) {
+        return false;
+    }
+    std::optional<LoadedDeck> deck = loadFromFile(lastFileName, loadedDeck.lastLoadInfo.fileFormat, false);
+
+    if (!deck) {
+        return false;
+    }
+
+    loadedDeck = *deck;
+    return true;
+}
+
 std::optional<LoadedDeck> DeckLoader::loadFromRemote(const QString &nativeString, int remoteDeckId)
 {
     DeckList deckList;

cockatrice/src/interface/deck_loader/deck_loader.h

@@ -62,6 +62,13 @@ public:
      */
     void loadFromFileAsync(const QString &fileName, DeckFileFormat::Format fmt, bool userRequest);
 
+    /**
+     * @brief Loads the file that the lastLoadInfo currently points to into this instance.
+     * No-ops if the lastLoadInfo is missing the required info or the load fails.
+     * @return Whether the loaded succeeded.
+     */
+    bool reload();
+
     /**
      * @brief Loads a deck from a local file.
      * @param fileName The file to load