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#!/bin/bash

shopt -s nullglob globstar

die() {
  echo "$@" >&2
  exit 1
}

PREFIX=${PASSWORD_STORE_DIR-~/.password-store}/otp
[[ -d "$PREFIX" ]] || die "Pass OTP directory does not exist"

if [[ "$1" == "-c" || "$1" == "--clip" ]]; then
  CLIP=1
  shift
fi

if [[ "$1" ]]; then
  [[ -f "$PREFIX/$1.gpg" ]] || die "otp/$1 does not exist"
  SITE="$1"
else
  OTPFILES=( "$PREFIX"/**/*.gpg )
  OTPFILES=( "${OTPFILES[@]#"$PREFIX"/}" )
  OTPFILES=( "${OTPFILES[@]%.gpg}" )
  SITE="$(printf '%s\n' "${OTPFILES[@]}" |
    fzf --height 8 --reverse --no-multi --prompt="Select Site: ")"
  if [[ ! "$SITE" ]]; then exit; fi
fi

URL="$(pass "otp/$SITE" 2>/dev/null | head -n1)"
[[ "$?" == "0" ]] || die "Authentication failed"
PERIOD="$(echo "$URL" | sed -n 's/^.*period=\([0-9]\+\).*$/\1/p')"
if [[ -z "$PERIOD" ]]; then PERIOD=30; fi
#BLOCKS=(" " "▏" "▎" "▍" "▌" "▋" "▊" "▉")
BLOCKS=(" " "▎" "▌" "▊")
TOTAL=$(( $PERIOD / 4 ))
echo

X_SELECTION="${PASSWORD_STORE_X_SELECTION:-clipboard}"

getclip() {
  [[ -n "$CLIP" ]] || return 0
  if command termux-clipboard-get; then termux-clipboard-get
  else xclip -o -selection "$X_SELECTION"; fi
}

setclip() {
  [[ -n "$CLIP" ]] || return 0
  if command termux-clipboard-set; then termux-clipboard-set
  else xclip -selection "$X_SELECTION"; fi
}

BEFORE="$(getclip 2>/dev/null | base64)"

function finish {
  # Clipboard managers frequently write their history out in plaintext, so we axe it here:
  qdbus org.kde.klipper /klipper org.kde.klipper.klipper.clearClipboardHistory &>/dev/null
  echo "$BEFORE" | base64 -d | setclip
  echo -ne "\r"
  tput el
  tput cuu1
  tput cnorm
  exit 0
}

trap finish SIGINT SIGTERM SIGQUIT
tput civis

while :; do
  OLDCODE="$CODE"
  CODE="$(pass otp "otp/$SITE" 2>/dev/null)"
  if [[ "$CODE" != "$OLDCODE" ]]; then
    echo -n "$CODE" | setclip ||
      die "Error: Could not copy data to the clipboard"
  fi

  WAIT=$(( $PERIOD - ( $(date +%s) % $PERIOD ) ))
  FULL=$(( $WAIT / 4 ))
  PARTIAL=$(( $WAIT % 4 ))
  BLANK=$(( $TOTAL - $FULL))

  echo -n "      "
  tput bold;     tput setab 8;  echo -ne "\r "
  tput setaf 8;  tput setab 18; echo -n " "
  tput setaf 6;                 echo -n "$SITE"
  tput setaf 8;                 echo -n "  "
  tput sgr0
  tput setaf 16; tput setab 18; echo -n "$CODE"
  tput setaf 8;                 echo -n " "
  for i in `seq $FULL`; do      echo -n "█"; done
  echo -n "${BLOCKS[$PARTIAL]}"
  for i in `seq $BLANK`; do     echo -n " "; done
  tput sgr0;     tput setaf 18; echo -n ""
  tput sgr0

  #sleep 0.1
  read -rsn1 -t.1 INP
  if [[ "$INP" = "q" || "$INP" = "Q" ||
    "$INP" = "$(echo -ne "\e")" ]]; then finish; fi

  NOW="$(getclip | base64)"
  [[ $NOW != $(echo -n "$CODE" | base64) ]] && BEFORE="$NOW"
done