Function importCollisionExists

packages/language-service/src/utils/ts_utils.ts:311–318

* Given an unqualified name, determine whether an existing import is already using this name in * the current scope. * TODO: It would be better to check if *any* symbol uses this name in the current scope.

(importDeclaration: ts.ImportDeclaration[], name: string)

 * TODO: It would be better to check if *any* symbol uses this name in the current scope.
 */
function importCollisionExists(importDeclaration: ts.ImportDeclaration[], name: string): boolean {
  const bindings = importDeclaration.map((declaration) => declaration.importClause?.namedBindings);
  const namedBindings: ts.NamedImports[] = bindings.filter(
    (binding) => binding !== undefined && ts.isNamedImports(binding),
  ) as ts.NamedImports[];
  const specifiers = namedBindings.flatMap((b) => b.elements);
  return specifiers.some((s) => s.name.text === name);
}

/**
 * Generator function that yields an infinite sequence of alternative aliases for a given symbol