#!/bin/bash

# Simplest user client for 0xff.i2p
# by acetone, 2021
#
VERSION="0.0.4"

######################################
############### CONFIG ###############
I2P_PROXY_ADDRESS=127.0.0.1:4444
# Localization
upload=upload
shorten=shorten
message=message
fromurl=fromurl
download=download
######################################
######################################

BOLD="\033[1m"
END="\033[0m"

usage() {
    echo -e "version: $VERSION\n
u$BOLD $upload $END   /path/to/local/file        upload local file (128MiB max)
f$BOLD $fromurl $END  http://example.org/file    upload file from URL (128MiB max)
s$BOLD $shorten $END  http://example.com/link    link shortener

d$BOLD $download $END http://file [output file]  download file from I2P
m$BOLD $message $END  <no arguments>             create and upload small text file

$BOLD<any STDOUT> | 0xff.sh$END                 upload any STDOUT via text file"
}

error() {
    echo -e "Error: $1 command requires an argument\nUse '-h' or '--help' for usage information"
    exit 2
}

main() {
    case "$1" in
    "$upload")
        if [ -n "$2" ]; then
            curl --proxy $I2P_PROXY_ADDRESS -# -T "$2" http://0xff.i2p | tee
        else error $1; fi
    ;;
    "$shorten")
        if [ -n "$2" ]; then
            curl --proxy $I2P_PROXY_ADDRESS -F"shorten=$2" http://0xff.i2p
        else error $1; fi
    ;;
    "$fromurl")
        if [ -n "$2" ]; then
            curl --proxy $I2P_PROXY_ADDRESS -F"url=$2" http://0xff.i2p
        else error $1; fi
    ;;
    "$download")
        if [ -n "$2" ]; then
            if [ -n "$3" ]; then
                curl --proxy $I2P_PROXY_ADDRESS -# $2 -o $3 # to file explicitily
                if [ $? != 0 ]; then exit 3; fi
            else
                autoname=${2#*http://0xff.i2p/}
                curl --proxy $I2P_PROXY_ADDRESS -# $2 -o ./$autoname
                if [ $? != 0 ]; then exit 3; fi
                if [[ $(echo $autoname | grep -e "\.txt$") != "" ]]; then
                    # Display and deleting a text file that was downloaded without explicitly saving
                    echo ""
                    cat ./$autoname
                    rm ./$autoname
                else
                    echo -e "File $BOLD$autoname$END was saved"
                fi
            fi
        else error $1; fi
    ;;
    "$message")
        echo -n "Message: "
        read message
        echo -e -n "\nUploading...\n> "
        echo $message | curl -s --proxy $I2P_PROXY_ADDRESS -T - http://0xff.i2p
    ;;

    # short arguments
    "u")
        main $upload $2 ;;
    "f")
        main $fromurl $2 ;;
    "s")
        main $shorten $2 ;;
    "d")
        main $download $2 $3 ;;
    "m")
        main $message ;;

    * )
        echo -e "Invalid argument: $1\nUse '-h' or '--help' for usage information"
        exit 1
    ;;
    esac
    exit 0
}

fromSTDIN() {
    TMP_FILE="/tmp/0xff_$(date '+%H-%M-%S')"
    while read LINE; do
        echo $LINE | tee -a $TMP_FILE
    done
    echo -e -n "\nUploading...\n> "
    curl -s --proxy $I2P_PROXY_ADDRESS -T "$TMP_FILE" http://0xff.i2p
    rm $TMP_FILE
}

# start
if [ -n "$1" ]
then
    if [ "$1" != "-h" ] && [ "$1" != "--help" ]
    then
        main $1 $2 $3
    else
        usage
    fi
else
    echo -e "Use '-h' or '--help' for usage information\nRead from STDIN...\n"
    fromSTDIN
fi