weather

#!/bin/dash
# A wrapper around https://github.com/chubin/wttr.in

WEATHER_CACHE_DIR="/home/alex/.cache/weather"
CACHEFILE=$WEATHER_CACHE_DIR"/current_weather.png"
CACHEFILE_WHITE=$WEATHER_CACHE_DIR"/current_weather_white.png"
CACHE_ONELINE=$WEATHER_CACHE_DIR"/current_weather_oneline.txt"
TIME=""
OPTION=$2

screen_resolution=$( xrandr | awk '/\*/ { print $1 }' ) 
screen_x=$(echo $screen_resolution | cut -d'x' -f1)
screen_y=$(echo $screen_resolution | cut -d'x' -f2)

SHOW_IMAGE_X=$((screen_x - 400))
SHOW_IMAGE_Y=$((35))

usage () {
  echo "Usage: $0 (help|update|show|get|reload|full|dark|white|text) [:help|p|q]"
  echo "  help    :   show this page
  show    :   show picture according to time
  get     :   get image from wttr.in
  reload  :   get and show
  full    :   curl wttr.in [:help|p|q]
  white   :   show white picture
  dark    :   show dark picture
  text    :   print one line text
  clear   :   clear text cache
  update  :   update awesome wibar

  example: weather f 'Kitchener_0pq'
           weather f moon
" >&2
  exit 0
}

dark_or_white() {
  h=$(date +%H)
  if [ $h -lt 7 -o $h -gt 19 ]; then
    echo it\'s late
    TIME="dark"
  else 
    echo good day
    TIME="white"
  fi
}

onlyprinttext() {
  info=$(cat $CACHE_ONELINE)
  case $info in 
    *DOCTYPE*) echo " n/a";;
    *)  echo $info ;;
  esac
}

negate_image() {
  convert $CACHEFILE -negate $CACHEFILE_WHITE
}

get_image() {
  curl -s 'wttr.in/Kitchener_0pq.png' > $CACHEFILE
  curl -s 'wttr.in/?format=%c+%t' > $CACHE_ONELINE
  notify-send "🌤 weather""Cache update"
  negate_image
}


print_detail() {
  echo curl -s "wttr.in/"$OPTION
  curl -s "wttr.in"/$OPTION
}


show_image() {
  if [ ! -e $CACHEFILE ]; then
    get_image
  fi

  echo showing $1
  if [ ! $1 = "white" ]; then
    n30f -x $SHOW_IMAGE_X -y $SHOW_IMAGE_Y $CACHEFILE -c "sxiv $CACHEFILE" &
  else 
    n30f -x $SHOW_IMAGE_X -y $SHOW_IMAGE_Y $CACHEFILE_WHITE -c "sxiv $CACHEFILE_WHITE" &
  fi
  pid_num=$!
  if [ $? -eq 0 ]; then 
    sleep 10s && kill $pid_num &
  fi
}

update_awesomewm() {
  oneline=`head -1 $CACHE_ONELINE`
  echo "myweather.text = \"$oneline\"" | awesome-client 
}

# main
if [ ! -d $WEATHER_CACHE_DIR ]; then
  mkdir $WEATHER_CACHE_DIR
  get_image && update_awesomewm
fi
case "$1" in 
  h|-h*|--h*)    usage ;;
  show|s)        dark_or_white; show_image $TIME;;
  dark|d)        show_image "dark";;
  white|w)       show_image "white";;
  get|g)         get_image ;;
  update|u)      update_awesomewm ;;
  reload|r)      get_image && dark_or_white && show_image && update_awesomewm;;
  full|f)        print_detail; OPTION=$2;;
  negate|n)      negate_image;;
  text|t)        onlyprinttext;;
  *)             onlyprinttext; usage;;
esac

# vim: filetype=sh