0x0.st

#!/usr/bin/env bash

set -euo pipefail
IFS=$'\n\t'

if [[ -t 1 ]]; then
    # stdout is a TTY, enable colors
    STYLE_COMMAND="\\e[0;97m"
    STYLE_ARG="\\e[0;96m"
    STYLE_ERROR="\\e[91m"
    STYLE_BOLD="\\e[1m"
    STYLE_NORMAL="\\e[22m"
    STYLE_RESET="\\e[0m"
else
    # stdout is not a TTY, disable colors
    STYLE_COMMAND=""
    STYLE_ARG=""
    STYLE_ERROR=""
    STYLE_BOLD=""
    STYLE_NORMAL=""
    STYLE_RESET=""
fi

# Returns 0 (true) if argument begins with `http://` or `https://`.
is_url() {
    if [[ "${1#http://}" != "$1" || "${1#https://}" != "$1" ]]; then
        return 0
    fi

    return 1
}

# Prints an error message to standard output.
print_error() {
    echo -e "${STYLE_ERROR}${STYLE_BOLD}Error:${STYLE_NORMAL} $1${STYLE_RESET}"
}

if [[ ! "${1:-}" || "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
    echo -e "${STYLE_BOLD}0x0, a wrapper script for https://0x0.st/${STYLE_RESET}\n"
    echo -e "  Upload a file:"
    echo -e "      ${STYLE_COMMAND}$(basename "$0") ${STYLE_ARG}<file>${STYLE_RESET}\n"
    echo -e "  Upload from an URL (the file won't be fetched locally):"
    echo -e "      ${STYLE_COMMAND}$(basename "$0") ${STYLE_ARG}<url>${STYLE_RESET}\n"
    echo -e "  Upload from standard input:"
    echo -e "      ${STYLE_COMMAND}$(basename "$0") ${STYLE_ARG}-${STYLE_RESET}\n"
    echo -e "The uploaded file's URL is printed to standard output when the upload is completed."

    # Exit with code 0 only if help was explicitly requested
    if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
        exit 0
    else
        exit 1
    fi
fi

if [[ -d "$1" ]]; then
    print_error "\"$1\" is a directory."
    exit 1
fi

if ! is_url "$1" && [[ ! -f "$1" && "$1" != "-" ]]; then
    # "-" can be used as argument to upload from standard input
    print_error "\"$1\": no such file."
    exit 1
fi

if is_url "$1"; then
    # Upload from URL
    response=$(curl -# -F "url=$1" https://0x0.st)
else
    # Upload from file
    response=$(curl -# -F "file=@$1" https://0x0.st)
fi
echo "$response" | xclip -selection clipboard
echo "$response"