chucknorrisfacts.sh

#!/usr/bin/env bash

purp='\x1b[38;5;171m'
# shellcheck disable=SC2086
has?() { hash $1 2>/dev/null; }
quit() { echo -e "\x1b[2J \x1b[0H ${purp}<3 \x1b[?25h \x1b[u \x1b[m"; }

trap "quit" EXIT

# shellcheck disable=SC2211
getdata() {
    if has? curl; then curl -s "$1"
    elif has? wget; then wget -q -O - "$1"
    else echo "Can't retrieve Need internet connection. :(" && exit
    fi
}

echo -en '\x1b[s'
echo -en "\x1b[?25l \x1b[2J \x1b[H"
python <(cat <<EOF
import sys
import time
fps = 25; time_per_frame = 1.0 / fps
buf = ''; frame = 0; next_frame = 0
begin = time.time()
try:
  for i, line in enumerate(sys.stdin):
    if i % 32 == 0:
      frame += 1
      sys.stdout.write(buf); buf = ''
      elapsed = time.time() - begin
      repose = (frame * time_per_frame) - elapsed
      if repose > 0.0:
        time.sleep(repose)
      next_frame = elapsed / time_per_frame
    if frame >= next_frame:
      buf += line
except KeyboardInterrupt:
  pass
EOF
) < <(getdata "https://keroserene.net/lol/astley80.full.bz2" | bunzip2 -q 2> /dev/null)