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use std::{fs::File, path::Path};
use crate::{pgs_error::Result, Error, PgsFile};
/// A struct for handling the opening of files to create `PgsFile` instances.
///
/// Currently, this struct does not maintain any internal state but provides a method to open a file and return a
/// `PgsFile` instance.
#[derive(Debug, Default)]
pub struct PgsReader {
}
impl PgsReader {
/// Opens a file and returns a `PgsFile` instance.
///
/// This method checks if the specified file exists and then attempts to open it. If successful, it creates a new
/// `PgsFile` instance using the opened file.
///
/// # Arguments
/// * `sup_file_path` - A string slice representing the path to the file to be opened.
///
/// # Returns
/// Returns a `Result` containing either a `PgsFile` instance on success or an `Error` if the file does not exist,
/// cannot be opened, or if creating the `PgsFile` instance fails.
///
/// # Errors
/// * `Error::File` - If the file does not exist or if the file cannot be opened.
/// * Any other `Error` arising from `PgsFile::new` or file operations.
pub fn open(sup_file_path: &str) -> Result<PgsFile> {
let path = Path::new(sup_file_path);
if !path.exists() {
return Err(Error::File(std::io::Error::new(std::io::ErrorKind::NotFound, "File not Exists")));
}
let file = File::open(sup_file_path)?;
PgsFile::new(file)
}
}