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#!/usr/bin/env sh

# x0.at paste client

# Vars

AUTOCOPY=1

# Functions

usage () {
  filename=$(basename "$0")
  cat <<- EOF
x0.at paste client

Usage :

# Upload a file
$ $filename [OPTIONS] file
$ cat file.ext | $filename [OPTIONS]

# Upload text
$ echo "upaste rocks" | up
$ up
upaste
really
rocks
C-d C-d

Options :
    -h    Print this usage
    -a    Disable autocopy in clipboard
    -t    Set extension, without dot
EOF
}

upload () {

  # Set vars
  local args
  local extension
  local file

  # Set extension
  if [ -n "$EXTENSION" ]
  then
    extension="filename=.$EXTENSION"
  fi

  if [ -z "$1" ]
  then
    # If argument is empty, upload stdin
    local file="file=@-"

    # If extension not set, set .txt
    if [ -z "$extension" ]
    then
      extension="filename=.txt"
    fi

  else
    # Else upload filename
    local file="file=@\"$1\""
  fi

  args="$file;$extension"

  # Curl call
  curl -s -F "$args" 'https://x0.at/'
}

autocopy () {
  # If xorg or wayland is running
  if env | grep 'DISPLAY' >/dev/null 2>&1
  then
    # If xclip is installed
    if which xclip >/dev/null 2>&1
    then
      xclip "$1"
    # Else if wl-clipboard is installed
    elif which wl-copy >/dev/null 2>&1
    then
      wl-copy -p "$1"
    fi
  fi
}

is_file () {
  # Test if first argument is an existing file
  if [ ! -f "$1" ]
  then
    echo "File \"$1\" does not exist or is not a regular file"
    exit 2
  fi
}

main () {

  # Vars
  local url

  # If no piped data
  if [ -t 0 ]
  then
  
    # If no argument, read stdin and save url
    if [ -z "$1" ]
    then
      url=$(upload)
      # Force a newline
      echo -e "\n"
    # Else upload argument and save url
    else
      # Test if file exists and is a regular file
      if [ -n "$1" ]
      then
        is_file "$1"
      fi
      url=$(upload "$1")
    fi
  
  # Else if piped data
  else
    # Test if argument exists
    if [ -n "$1" ]
    then
      echo "Warning: ignoring file $1..."
    fi
    # Upload and save url
    url=$(upload)
  fi
  
  # Print url
  echo "$url"

  # If autocopy is set
  if [ "$AUTOCOPY" == "1" ]
  then
    # Autocopy url
    autocopy "$url"
  fi
}

# Main

while getopts "hat:" arg
do
  case $arg in
    a)
      AUTOCOPY=0
      ;;
    h)
      usage
      exit
      ;;
    t)
      EXTENSION=${OPTARG}
      ;;
    *)
      usage
      exit 1
      ;;
  esac
done
shift $((OPTIND-1))

main "$@"