feat[DatabaseManager]: add an interface to determine whether the database has...

feat[DatabaseManager]: add an interface to determine whether the database has been successfully opened

222100414/src/DatabaseManager.cpp

@@ -20,11 +20,14 @@ namespace Mika {
         if (rc) {
             LOG_ERROR({ std::string("Can't open database: ") + sqlite3_errmsg(db) });
             sqlite3_close(db);
+        } else {
+            isOpen = true;
         }
     }
 
     void DatabaseManager::close() {
         sqlite3_close(db);
+        isOpen = false;
     }
 
     void DatabaseManager::executeNonQuery(const std::string &sql) {
@@ -42,4 +45,8 @@ namespace Mika {
         }
         return instance;
     }
+
+    bool DatabaseManager::isOpened() const {
+        return isOpen;
+    }
 }
\ No newline at end of file

222100414/src/DatabaseManager.h

@@ -30,6 +30,7 @@ namespace Mika {
     class DatabaseManager {
     private:
         sqlite3 *db{};
+        bool isOpen = false;
         static DatabaseManager *instance;
 
     private:
@@ -51,6 +52,8 @@ namespace Mika {
 
         void executeNonQuery(const std::string &sql);
 
+        [[nodiscard]] bool isOpened() const;
+
         template<Fillable T>
         std::vector<T> executeQuery(const std::string &sql);