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#!/usr/bin/env sh

# paste client

# Vars

autocopy=0
url="https://0x0.st/"

# Functions

usage () {
  filename=$(basename "$0")
  cat <<- EOF
$url 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    Enable autocopy in clipboard
    -t    Set extension, without dot
EOF
}

upload () {

  # If extension is set with -t option, set curl ext
  if [ -n "$extension" ]
  then
    ext="filename=.$extension"
  fi

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

    # If curl ext not set, set it to .txt
    if [ -z "$ext" ]
    then
      ext="filename=.txt"
    fi

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

  args="$file;$ext"

  # Curl call
  curl -s -F "$args" "$url"
}

autocopy () {
  # If xorg or wayland is running
  if [ -n "$DISPLAY" ]
  then
    if [ "$XDG_SESSION_TYPE" = "x11" ]
    then
      # If xclip is installed
      if which xclip >/dev/null 2>&1
      then
        echo "$1" | xclip
      fi
    fi
    if [ "$XDG_SESSION_TYPE" = "wayland" ]
    then
      # Else if wl-clipboard is installed
      if which wl-copy >/dev/null 2>&1
      then
        wl-copy -p "$1"
      fi
    fi
  fi
}

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

main () {

  # 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
      printf "\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 $arg in
    a)
      autocopy=1
      ;;
    h)
      usage
      exit
      ;;
    t)
      extension=${OPTARG}
      ;;
    *)
      usage
      exit 1
      ;;
  esac
done
shift $((OPTIND-1))

main "$@"