Added Application HolidayViewer

src/components/repositories/db_management.py

@@ -97,6 +97,13 @@ class RepositoriesDbManager:
     self.settings_manager.save(self.session, REPOSITORIES_SETTINGS_ENTRY, settings)
     return repository
   
+  def exists_repository(self, repository_name):
+    if repository_name is None or repository_name == "":
+      raise ValueError("Repository name cannot be empty.")
+    
+    settings = self._get_settings()
+    return repository_name in [repo.name for repo in settings.repositories]
+  
   def get_repositories(self):
     return self._get_settings().repositories
   
@@ -141,6 +148,36 @@ class RepositoriesDbManager:
     repository.tables.remove(table_name)
     self.settings_manager.save(self.session, REPOSITORIES_SETTINGS_ENTRY, settings)
   
+  def exists_table(self, repository_name: str, table_name: str):
+    if repository_name is None or repository_name == "":
+      raise ValueError("Repository name cannot be empty.")
+    
+    if table_name is None or table_name == "":
+      raise ValueError("Table name cannot be empty.")
+    
+    settings = self._get_settings()
+    repository = next(filter(lambda r: r.name == repository_name, settings.repositories), None)
+    if repository is None:
+      return False
+    
+    return table_name in repository.tables
+  
+  def ensure_exists(self, repository_name: str, table_name: str):
+    """
+    
+    :param repository_name:
+    :param table_name:
+    :return:
+    """
+    try:
+      if not self.exists_table(repository_name, table_name):
+        self.add_table(repository_name, table_name)
+      
+    except NameError:
+      self.add_repository(repository_name, [table_name])
+    
+    return repository_name, table_name
+  
   def select_repository(self, repository_name: str):
     """
     Select and save the specified repository name in the current session's settings.
@@ -172,12 +209,12 @@ class RepositoriesDbManager:
     settings = self._get_settings()
     repository = next(filter(lambda r: r.name == repository_name, settings.repositories), None)
     if repository is None:
-      raise ValueError(f"Repository '{repository_name}' does not exist.")
+      raise NameError(f"Repository '{repository_name}' does not exist.")
     
     for table_name, must_exist in zip(tables_names, [t1_must_exists, t2_must_exists]):
       if must_exist:
         if table_name not in repository.tables:
-          raise ValueError(f"Table '{table_name}' does not exist in repository '{repository_name}'.")
+          raise NameError(f"Table '{table_name}' does not exist in repository '{repository_name}'.")
       else:
         if table_name in repository.tables:
           raise ValueError(f"Table '{table_name}' already exists in repository '{repository_name}'.")