# extractors.rs - source
Source of the Rust file `src/lib/extractors.rs`.

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    use std::{fs::{self, File}, error::Error, io::{self, ErrorKind, Write, Read}, path::Path,};
    use lzma::reader::LzmaReader;
    use flate2::read::GzDecoder;
    use bzip2::read::BzDecoder;
    use unrar::Archive;

    /// Extracts files from a ZIP archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the ZIP file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_zip(Path::new("src/test_data/test.zip"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_zip(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        let file = fs::File::open(input_path)?;
        let mut archive = zip::ZipArchive::new(file)?;
        for i in 0..archive.len() {
            let mut file = archive.by_index(i)?;
            let outpath = match file.enclosed_name() {
                Some(path) => path.to_owned(),
                None => continue,
            };
            let full_outpath = output_directory.join(&outpath);
            {
                let comment = file.comment();
                if !comment.is_empty() {
                    println!("File {} comment: {}", i, comment);
                }
            }
            if (*file.name()).ends_with('/') {
                fs::create_dir_all(&full_outpath).unwrap();
            } else {
                if let Some(p) = full_outpath.parent() {
                    if !p.exists() {
                        fs::create_dir_all(p).unwrap();
                    }
                }
                let mut outfile = fs::File::create(&full_outpath).unwrap();
                io::copy(&mut file, &mut outfile).unwrap();
            }
            // Get and Set permissions
            #[cfg(unix)]
            {
                use std::os::unix::fs::PermissionsExt;

                if let Some(mode) = file.unix_mode() {
                    fs::set_permissions(&full_outpath, fs::Permissions::from_mode(mode)).unwrap();
                }
            }
        }

        Ok(())
    }

    /// Extracts files from a RAR archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the RAR file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_rar(Path::new("src/test_data/test.rar"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_rar(input_path: &Path, output_directory: &Path) -> Result<(), Box<dyn Error>> {
        let mut archive = Archive::new(input_path)
                .open_for_processing()
                .unwrap();
        while let Some(header) = archive.read_header()? {
            let output_path = output_directory.join(&header.entry().filename);
            archive = if header.entry().is_file() {
                header.extract_to(&output_path)?
            } else {
                header.skip()?
            };
        }
        Ok(())
    }

    /// Extracts files from a TAR archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the TAR file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_tar(Path::new("src/test_data/test.tar"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_tar(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        let tar_file = fs::File::open(input_path)?;
        let mut a = tar::Archive::new(tar_file);

        for i in a.entries()? {
            let mut i = i?;
            let entry_path = i.header().path()?;
            let full_path = output_directory.join(entry_path);

            if i.header().entry_type().is_dir() {
                fs::create_dir_all(&full_path)?;
            } else {
                fs::create_dir_all(&full_path.parent().unwrap())?;

                let mut file = fs::File::create(&full_path)?;
                io::copy(&mut i, &mut file)?;
            }
        }

        Ok(())
    }

    /// Extracts files from an LZMA compressed archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the LZMA compressed file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_lzma(Path::new("src/test_data/test.lzma"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_lzma(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        let input_file = File::open(input_path)?;
        let mut decompressor = LzmaReader::new_decompressor(input_file)
            .map_err(|err| io::Error::new(io::ErrorKind::Other, err))?;
        let output_file_path = output_directory.join(input_path.file_stem().unwrap());
        let mut output_file = File::create(&output_file_path)?;
        io::copy(&mut decompressor, &mut output_file)?;
        Ok(())
    }

    /// Extracts files from a GZ (gzip) compressed archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the GZ compressed file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_gz(Path::new("src/test_data/test.gz"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_gz(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        let input_file = File::open(input_path)?;
        let mut decompressor = GzDecoder::new(input_file);
        let output_file_path = output_directory.join(input_path.file_stem().unwrap());
        let mut output_file = File::create(&output_file_path)?;
        match io::copy(&mut decompressor, &mut output_file) {
            Ok(_) => Ok(()),
            Err(err) => Err(io::Error::new(ErrorKind::Other, err.to_string())),
        }
    }

    /// Extracts files from a BZ2 (bzip2) compressed archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the BZ2 compressed file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_bz2(Path::new("src/test_data/test.bz2"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_bz2(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        let input_file = File::open(input_path)?;
        let bz2_reader = BzDecoder::new(input_file);
        let output_file_path = output_directory.join(input_path.file_stem().unwrap());
        let mut output_file = File::create(&output_file_path)?;
        let mut buffer = Vec::new();
        let mut decompressor = io::BufReader::new(bz2_reader);
        loop {
            let bytes_read = decompressor.read_to_end(&mut buffer)?;
            if bytes_read == 0 {
                break; // End of file
            }
            output_file.write_all(&buffer[..bytes_read])?;
            buffer.clear();
        }

        Ok(())
    }

    /// Extracts files from a 7Z archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the 7Z file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_7z(Path::new("src/test_data/test.7z"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_7z(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        sevenz_rust::decompress_file(input_path, output_directory).expect("complete");
        Ok(())
    }

    /// Extracts files from a TBZ2 (tar.bz2) compressed archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the TBZ2 compressed file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_tbz2(Path::new("src/test_data/test.tbz2"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_tbz2(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        let input_file = File::open(input_path)?;
        let bz2_reader = BzDecoder::new(input_file);
        let mut archive = tar::Archive::new(bz2_reader);
        for entry in archive.entries()? {
            let mut entry = entry?;
            let entry_path = entry.path()?;
            let full_path = output_directory.join(entry_path);
            if entry.header().entry_type().is_dir() {
                fs::create_dir_all(&full_path)?;
            } else {
                fs::create_dir_all(&full_path.parent().unwrap())?;

                let mut file = fs::File::create(&full_path)?;
                io::copy(&mut entry, &mut file)?;
            }
        }
        Ok(())
    }

    /// Extracts files from a TGZ (tar.gz) compressed archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the TGZ compressed file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_tgz(Path::new("src/test_data/test.tgz"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_tgz(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        let input_file = File::open(input_path)?;
        let mut decompressor = GzDecoder::new(input_file);
        let mut archive = tar::Archive::new(&mut decompressor);
        for entry in archive.entries()? {
            let mut entry = entry?;
            let entry_path = entry.path()?;
            let full_path = output_directory.join(entry_path);
            if entry.header().entry_type().is_dir() {
                fs::create_dir_all(&full_path)?;
            } else {
                fs::create_dir_all(&full_path.parent().unwrap())?;
                let mut file = fs::File::create(&full_path)?;
                io::copy(&mut entry, &mut file)?;
            }
        }
        Ok(())
    }

    /// Extracts files from a TXZ (tar.xz) compressed archive.
    ///
    /// # Arguments
    ///
    /// * `input_path` - The path to the TXZ compressed file to extract.
    /// * `output_directory` - The destination directory for extracted files.
    ///
    /// # Returns
    ///
    /// Returns `Ok(())` on success, or an `Error` if extraction fails.
    ///
    /// # Examples
    ///
    /// ```
    /// use std::path::Path;
    /// let result = extract_txz(Path::new("src/test_data/test.txz"), Path::new("output_directory"));
    /// assert!(result.is_ok());
    /// ```
    pub fn extract_txz(input_path: &Path, output_directory: &Path) -> Result<(), io::Error> {
        let input_file = File::open(input_path)?;
        let mut decompressor = LzmaReader::new_decompressor(input_file)
            .map_err(|err| io::Error::new(io::ErrorKind::Other, err))?;
        let mut archive = tar::Archive::new(&mut decompressor);
        for entry in archive.entries()? {
            let mut entry = entry?;
            let entry_path = entry.path()?;
            let full_path = output_directory.join(entry_path);
            if entry.header().entry_type().is_dir() {
                fs::create_dir_all(&full_path)?;
            } else {
                fs::create_dir_all(&full_path.parent().unwrap())?;
                let mut file = fs::File::create(&full_path)?;
                io::copy(&mut entry, &mut file)?;
            }
        }
        Ok(())
    }