extract

#!/bin/bash

# Description: This script extracts various archive file formats based on their extension.
# Dependency: zip, tar, 7z, xz, gzip

# Print help message 
if [[ "$1" == "-h" || "$1" == "--help" ]]; then
    echo "This script extracts various archive file formats based on their extension."
    echo "Usage: "
    echo "      extract [filename] "
    echo "Example: "
    echo "      extract documents.zip"
    exit 0
fi

# Check if required commands are installed
check_command() {
  if ! command -v "$1" >/dev/null 2>&1; then
    echo "Error: '$1' is not installed. Please install it using your package manager."
    exit 1
  fi
}

check_command "tar"
check_command "7z"
check_command "xz"

# Check if a file is provided
if [ -z "$1" ]; then
  echo "Error: Please provide a file to extract."
  exit 1
fi

# Check if the file exists
if [ ! -f "$1" ]; then
  echo "File does not exist."
  exit 1
fi

# Extract the file based on its extension
extract_archive() {
  local filename="$1"
  case "$filename" in
    *.zip)
      unzip "$filename"
      ;;
    *.tar)
      tar xvf "$filename"
      ;;
    *.tar.gz | *.tgz)
      tar xzvf "$filename"
      ;;
    *.tar.bz2)
      tar xjvf "$filename"
      ;;
    *.tar.xz | *.txz)
      tar Jxvf "$filename"
      ;;
    *.tar.lzma | *.taz)
      tar --lzma -xvf "$filename"
      ;;
    *.tar.Z)
      tar Zxvf "$filename"
      ;;
    *.tar.lzo)
      tar --lzop -xvf "$filename"
      ;;
    *.tar.lz)
      tar --lzip -xvf "$filename"
      ;;
    *.tar.lrz)
      tar --lrzip -xvf "$filename"
      ;;
    *.7z)
      7z x "$filename"
      ;;
    *.gz)
      gzip -dv "$filename"
      ;;
    *.xz)
      xz -dv "$filename"
      ;;
    *)
      echo "Error: Unsupported file extension."
      exit 1
      ;;
  esac
}

# Extract the archive
extract_archive "$1"

# Check if the extraction completed without any errors
if [[ $? -eq 0 ]]; then
  echo "Extraction completed!"
  exit 0
else
  echo "Extraction failed!"
  exit 1
fi