Function createVariable

packages/blockly/core/variables.ts:732–761

* Helper function to create a variable on the given workspace. * * @param workspace The workspace in which to create the variable. It may be a * flyout workspace or main workspace. * @param id The ID to use to create the variable, or null. * @param opt_name The string to use to create the

(
  workspace: Workspace,
  id: string | null,
  opt_name?: string,
  opt_type?: string,
)

 *     combination.
 */
function createVariable(
  workspace: Workspace,
  id: string | null,
  opt_name?: string,
  opt_type?: string,
): IVariableModel<IVariableState> {
  const variableMap = workspace.getVariableMap();
  const potentialVariableMap = workspace.getPotentialVariableMap();
  // Variables without names get uniquely named for this workspace.
  if (!opt_name) {
    const ws = workspace.isFlyout
      ? (workspace as WorkspaceSvg).targetWorkspace
      : workspace;
    opt_name = generateUniqueName(ws!);
  }

  // Create a potential variable if in the flyout.
  let variable = null;
  if (potentialVariableMap) {
    variable = potentialVariableMap.createVariable(
      opt_name,
      opt_type,
      id ?? undefined,
    );
  } else {
    // In the main workspace, create a real variable.
    variable = variableMap.createVariable(opt_name, opt_type, id);
  }
  return variable;
}

/**
 * Helper function to get the list of variables that have been added to the