#! /usr/bin/env bash

RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

vercomp () {
    if [[ $1 == $2 ]]
    then
        return 1
    fi
    local IFS=.
    local i ver1=($1) ver2=($2)
    # fill empty fields in ver1 with zeros
    for ((i=${#ver1[@]}; i<${#ver2[@]}; i++))
    do
        ver1[i]=0
    done
    for ((i=0; i<${#ver1[@]}; i++))
    do
        if [[ -z ${ver2[i]} ]]
        then
            # fill empty fields in ver2 with zeros
            ver2[i]=0
        fi
        if ((10#${ver1[i]} > 10#${ver2[i]}))
        then
            return 1
        fi
    done
    return 0
}

composer_version_string=`composer --version`
composer_version=`echo $composer_version_string | awk 'BEGIN { FS="[ ]" } ; { print $3 }'`

if [[ $(vercomp $composer_version 1.9.0 ; echo $?) -eq 0 ]]; then
    echo -e "${RED}Please update your version of composer.${NC} The minimum requirements is 1.9.0."
    echo -e "The minimum requirement is 1.9.0. You can use the following to update your composer installation:"

    cat << EOF

  $ php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
  $ php -r "if (hash_file('sha384', 'composer-setup.php') === 'e0012edf3e80b6978849f5eff0d4b4e4c79ff1609dd1e613307e16318854d24ae64f26d17af3ef0bf7cfb710ca74755a') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
  $ php composer-setup.php --install-dir=/tmp --filename=composer
  $ mv /tmp/composer /usr/local/bin/composer
EOF

    exit 1

fi