#!/bin/sh

# Error handling
set -e

# For styling/colorizing output
txtbld=$(tput bold)
txtblue=${txtbld}$(tput setaf 4)
txtgreen=${txtbld}$(tput setaf 2)
txtred=${txtbld}$(tput setaf 1)
txtyellow=${txtbld}$(tput setaf 3)
txtwhite=${txtbld}$(tput setaf 7)

# Intro Prompt
echo "${txtgreen}xtract: a simple shell script for decompressing common file formats"

# Dependency check
# not to be used in actual program, encapsulate in function and use depending on which file is fed to xtract
dependencies=("tar" "zip" "bzip2" "gzip" "gunzip" "pax" "7z" "ar" "cpio" "brotli" "lzip" "rzip" "xz" "zstd")
numdependencies=14
missingdependencies=0
for ((i = 0; i < numdependencies; i++)) ;
do
    if ! command -v "${dependencies[$i]}" &> /dev/null
    then
        echo "${txtred}dependency not met: ${dependencies[$i]}${txtwhite}"
        missingdependencies=$((missingdependencies+1))
    fi
done