261 lines
7.8 KiB
Bash
Executable File
261 lines
7.8 KiB
Bash
Executable File
#!/bin/bash
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# Author: Alexander Epstein https://github.com/alexanderepstein
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base=""
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exchangeTo=""
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currentVersion="1.6.0"
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configuredClient=""
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## This function determines which http get tool the system has installed and returns an error if there isnt one
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getConfiguredClient()
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{
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if command -v curl &>/dev/null ; then
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configuredClient="curl"
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elif command -v wget &>/dev/null ; then
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configuredClient="wget"
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elif command -v fetch &>/dev/null ; then
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configuredClient="fetch"
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else
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echo "Error: This tool reqires either curl, wget, or fetch to be installed."
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return 1
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fi
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}
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## Allows to call the users configured client without if statements everywhere
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httpGet()
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{
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case "$configuredClient" in
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curl) curl -A curl -s "$@";;
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wget) wget -qO- "$@";;
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fetch) fetch -o "...";;
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esac
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}
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checkValidCurrency()
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{
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if [[ $1 != "AUD" && $1 != "BGN" && $1 != "BRL" \
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&& $1 != "CAD" && $1 != "CHF" && $1 != "CNY" && $1 != "CZK" && $1 != "DKK" \
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&& $1 != "EUR" && $1 != "GBP" && $1 != "HKD" && $1 != "HRK" && $1 != "HUF" \
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&& $1 != "IDR" && $1 != "ILS" && $1 != "INR" && $1 != "JPY" && $1 != "KRW" \
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&& $1 != "MXN" && $1 != "MYR" && $1 != "NOK" && $1 != "NZD" && $1 != "PHP" \
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&& $1 != "PLN" && $1 != "RON" && $1 != "RUB" && $1 != "SEK" && $1 != "SGD" \
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&& $1 != "THB" && $1 != "TRY" && $1 != "USD" && $1 != "ZAR" ]];then
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echo "1"
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else
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echo "0"
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fi
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}
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## Grabs the base currency from the user and validates it with all the possible currency
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## types available on the API and guides user through input (doesnt take in arguments)
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getBase()
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{
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echo -n "What is the base currency: "
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read -r base
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base=$(echo $base | tr /a-z/ /A-Z/)
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if [[ $(checkValidCurrency $base) == "1" ]];then
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unset base
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echo "Invalid base currency"
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getBase
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fi
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}
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## Checks base currency from the user and validates it with all the possible currency
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## types available on the API (requires argument)
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checkBase()
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{
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base=$1
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base=$(echo $base | tr /a-z/ /A-Z/)
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if [[ $(checkValidCurrency $base) == "1" ]];then
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unset base
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echo "Invalid base currency"
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exit 1
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fi
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}
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## Grabs the exchange to currency from the user and validates it with all the possible currency
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## types available on the API and guides user through input (doesnt take in arguments)
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getExchangeTo()
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{
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echo -n "What currency to exchange to: "
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read -r exchangeTo
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exchangeTo=$(echo $exchangeTo | tr /a-z/ /A-Z/)
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if [[ $(checkValidCurrency $exchangeTo) == "1" ]];then
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echo "Invalid exchange currency"
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unset exchangeTo
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getExchangeTo
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fi
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}
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## Grabs the exchange to currency from the user and validates it with all the possible currency
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## types available on the API (requires arguments)
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checkExchangeTo()
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{
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exchangeTo=$1
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exchangeTo=$(echo $exchangeTo | tr /a-z/ /A-Z/)
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if [[ $(checkValidCurrency $exchangeTo) == "1" ]];then
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echo "Invalid exchange currency"
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unset exchangeTo
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exit 1
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fi
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}
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## Get the amount that will be exchanged and validate that the user has entered a number (decimals are allowed)
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## doesnt take in argument, it guides user through input
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getAmount()
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{
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echo -n "What is the amount being exchanged: "
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read -r amount
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if [[ ! "$amount" =~ ^[0-9]+(\.[0-9]+)?$ ]]
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then
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echo "The amount has to be a number"
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unset amount
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getAmount
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fi
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}
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## Get the amount that will be exchanged
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## validate that the user has entered a number (decimals are allowed and requires argument)
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checkAmount()
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{
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amount=$1
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if [[ ! "$amount" =~ ^[0-9]+(\.[0-9]+)?$ ]]
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then
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echo "The amount has to be a number"
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unset amount
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exit 1
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fi
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}
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checkInternet()
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{
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echo -e "GET http://google.com HTTP/1.0\n\n" | nc google.com 80 > /dev/null 2>&1
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if [ $? -eq 0 ]; then
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return 0
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else
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echo "Error: no active internet connection" >&2
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return 1
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fi
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}
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## Grabs the exchange rate and does the math for converting the currency
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convertCurrency()
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{
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exchangeRate=$(httpGet "http://api.fixer.io/latest?base=$base&symbols=$exchangeTo" | grep -Eo "[0-9]*[.][0-9]*") > /dev/null
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exchangeAmount=$(echo "$exchangeRate * $amount" | bc )
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echo
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echo "========================="
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echo "| $base to $exchangeTo"
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echo "| Rate: $exchangeRate"
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echo "| $base: $amount"
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echo "| $exchangeTo: $exchangeAmount"
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echo "========================="
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}
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update()
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{
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# Author: Alexander Epstein https://github.com/alexanderepstein
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# Update utility version 1.2.0
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# To test the tool enter in the defualt values that are in the examples for each variable
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repositoryName="Bash-Snippets" #Name of repostiory to be updated ex. Sandman-Lite
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githubUserName="alexanderepstein" #username that hosts the repostiory ex. alexanderepstein
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nameOfInstallFile="install.sh" # change this if the installer file has a different name be sure to include file extension if there is one
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latestVersion=$(httpGet https://api.github.com/repos/$githubUserName/$repositoryName/tags | grep -Eo '"name":.*?[^\\]",'| head -1 | grep -Eo "[0-9.]+" ) #always grabs the tag without the v option
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if [[ $currentVersion == "" || $repositoryName == "" || $githubUserName == "" || $nameOfInstallFile == "" ]];then
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echo "Error: update utility has not been configured correctly." >&2
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exit 1
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elif [[ $latestVersion == "" ]];then
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echo "Error: no active internet connection" >&2
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exit 1
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else
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if [[ "$latestVersion" != "$currentVersion" ]]; then
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echo "Version $latestVersion available"
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echo -n "Do you wish to update $repositoryName [Y/n]: "
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read -r answer
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if [[ "$answer" == "Y" || "$answer" == "y" ]] ;then
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cd ~ || { echo 'Update Failed' ; exit 1 ; }
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if [[ -d ~/$repositoryName ]]; then rm -r -f $repositoryName || { echo "Permissions Error: try running the update as sudo"; exit 1; } ; fi
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git clone "https://github.com/$githubUserName/$repositoryName" || { echo "Couldn't download latest version" ; exit 1; }
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cd $repositoryName || { echo 'Update Failed' ; exit 1 ;}
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git checkout "v$latestVersion" 2> /dev/null || git checkout "$latestVersion" 2> /dev/null || echo "Couldn't git checkout to stable release, updating to latest commit."
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chmod a+x install.sh #this might be necessary in your case but wasnt in mine.
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./$nameOfInstallFile "update" || exit 1
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cd ..
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rm -r -f $repositoryName || { echo "Permissions Error: update succesfull but cannot delete temp files located at ~/$repositoryName delete this directory with sudo"; exit 1; }
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else
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exit 1
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fi
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else
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echo "$repositoryName is already the latest version"
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fi
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fi
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}
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usage()
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{
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echo "Currency tool"
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echo "Usage: currency or currency [flag] or currency [base] [exchangeTo] [amount]"
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echo " -u Update Bash-Snippet Tools"
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echo " -h Show the help"
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echo " -v Get the tool version"
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}
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getConfiguredClient || exit 1
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checkInternet || exit 1 # check if we have a valid internet connection if this isnt true the rest of the script will not work so stop here
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while getopts "uvh" opt; do
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case $opt in
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\?)
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echo "Invalid option: -$OPTARG" >&2
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exit 1
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;;
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h)
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usage
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exit 0
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;;
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v)
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echo "Version $currentVersion"
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exit 0
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;;
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u)
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update
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exit 0
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;;
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:)
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echo "Option -$OPTARG requires an argument." >&2
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exit 1
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;;
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esac
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done
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if [[ $# == 0 ]]; then
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getBase # get base currency
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getExchangeTo # get exchange to currency
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getAmount # get the amount to be converted
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convertCurrency # grab the exhange rate and perform the conversion
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exit 0
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elif [[ $# == "1" ]]; then
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if [[ $1 == "update" ]];then
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update
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elif [[ $1 == "help" ]]; then
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usage
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else
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echo "Not a valid argument"
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usage
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exit 1
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fi
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elif [[ $# == "2" ]]; then
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echo "Not a valid argument"
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usage
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exit 1
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elif [[ $# == "3" ]];then
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checkBase $1
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checkExchangeTo $2
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checkAmount $3
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convertCurrency
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exit 0
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fi
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