DolphinQt: Show WAD as "WAD" instead of "" in file format column

https://bugs.dolphin-emu.org/issues/12190

Source/Core/DolphinQt/GameList/GameListModel.cpp

@@ -168,12 +168,7 @@ QVariant GameListModel::data(const QModelIndex& index, int role) const
     break;
   case COL_FILE_FORMAT:
     if (role == Qt::DisplayRole || role == SORT_ROLE)
-    {
-      if (game.ShouldShowFileFormatDetails())
-        return QString::fromStdString(DiscIO::GetName(game.GetBlobType(), true));
-      else
-        return {};
-    }
+      return QString::fromStdString(game.GetFileFormatName());
     break;
   case COL_BLOCK_SIZE:
     if (role == Qt::DisplayRole)

Source/Core/UICommon/GameFile.cpp

@@ -336,14 +336,17 @@ void GameFile::DoState(PointerWrap& p)
   m_custom_cover.DoState(p);
 }
 
+std::string GameFile::GetExtension() const
+{
+  std::string extension;
+  SplitPath(m_file_path, nullptr, nullptr, &extension);
+  return extension;
+}
+
 bool GameFile::IsElfOrDol() const
 {
-  if (m_file_path.size() < 4)
-    return false;
-
-  std::string name_end = m_file_path.substr(m_file_path.size() - 4);
-  std::transform(name_end.begin(), name_end.end(), name_end.begin(), ::tolower);
-  return name_end == ".elf" || name_end == ".dol";
+  const std::string extension = GetExtension();
+  return extension == ".elf" || extension == ".dol";
 }
 
 bool GameFile::ReadXMLMetadata(const std::string& path)
@@ -592,6 +595,25 @@ bool GameFile::ShouldShowFileFormatDetails() const
   }
 }
 
+std::string GameFile::GetFileFormatName() const
+{
+  switch (m_platform)
+  {
+  case DiscIO::Platform::WiiWAD:
+    return "WAD";
+  case DiscIO::Platform::ELFOrDOL:
+  {
+    std::string extension = GetExtension();
+    std::transform(extension.begin(), extension.end(), extension.begin(), ::toupper);
+
+    // substr removes the dot
+    return extension.substr(std::min<size_t>(1, extension.size()));
+  }
+  default:
+    return DiscIO::GetName(m_blob_type, true);
+  }
+}
+
 const GameBanner& GameFile::GetBannerImage() const
 {
   return m_custom_banner.empty() ? m_volume_banner : m_custom_banner;

Source/Core/UICommon/GameFile.h

@@ -89,6 +89,7 @@ public:
   u64 GetBlockSize() const { return m_block_size; }
   const std::string& GetCompressionMethod() const { return m_compression_method; }
   bool ShouldShowFileFormatDetails() const;
+  std::string GetFileFormatName() const;
   const std::string& GetApploaderDate() const { return m_apploader_date; }
   u64 GetFileSize() const { return m_file_size; }
   u64 GetVolumeSize() const { return m_volume_size; }
@@ -115,6 +116,7 @@ private:
                                    const std::map<DiscIO::Language, std::string>& strings);
   const std::string&
   LookupUsingConfigLanguage(const std::map<DiscIO::Language, std::string>& strings) const;
+  std::string GetExtension() const;
   bool IsElfOrDol() const;
   bool ReadXMLMetadata(const std::string& path);
   bool ReadPNGBanner(const std::string& path);