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use crate::error::{Error, PermissionType, Result}; use std::fs::File; use std::io::ErrorKind; use std::path::Path; pub fn open_file(filename: &Path) -> Result<Option<File>> { File::open(filename).map(Some).or_else(|e| match e { e if e.kind() == ErrorKind::NotFound => Ok(None), e if e.kind() == ErrorKind::PermissionDenied => Err(Error::Permissions( PermissionType::Read, filename.to_path_buf(), )), e => Err(Error::from(e)), }) } pub fn create_file(filename: &Path) -> Result<File> { File::create(filename).map_err(|e| { if e.kind() == ErrorKind::PermissionDenied { Error::Permissions(PermissionType::Write, filename.to_path_buf()) } else { Error::from(e) } }) }