Example callback scripts

optimize, preview, and upload

by @DanielFGray

#!/usr/bin/env bash

# https://github.com/DanielFGray/yaxg/wiki/Example-callback-scripts

declare -r default_preview='mirage'
declare -r webm_preview='mpv --loop=inf --fullscreen --video-unscaled=downscale-big'
declare -r upload_script='tekup'

declare -r file="$1"
declare -A colors
colors[red]=$(tput setaf 1)
colors[blue]=$(tput setaf 4)
colors[reset]=$(tput sgr0)

in_term() {
  [[ -t 0 || -p /dev/stdin ]]
}

has() {
  local verbose
  if [[ $1 = '-v' ]]; then
    verbose=1
    shift
  fi
  for c; do c="${c%% *}"
    if ! command -v "$c" &> /dev/null; then
      (( "$verbose" > 0 )) && err "$c not found"
      return 1
    fi
  done
}

info() {
  if in_term; then
    printf '%s\n' "$*" >&2
  else
    notify-send 'yaxg' "$*"
  fi
}

err() {
  if in_term; then
    printf "${colors[red]}%s${colors[reset]}\n" "$*" >&2
  else
    notify-send -u critical 'yaxg: error' "$*"
  fi
}

die() {
  [[ -n "$1" ]] && err "$1"
  exit 1
}

ask() {
  if in_term; then
    read -r -n1 -p "$* " ans
    printf '\n'
    [[ ${ans^} = Y* ]]
  else
    zenity --title='yaxg' --question --text="$*" 2> /dev/null
  fi
}

# optimize
if has optipng && [[ "$file" =~ png$ ]]; then
  info "optimizing $file"
  optipng -q "$file"
fi

# preview
if [[ "$file" =~ webm$ ]]; then
  $webm_preview "$file" 2> /dev/null
else
  $default_preview "$file" 2> /dev/null
fi

# upload
if [[ -f "$file" ]]; then
  if ask "Upload with ${upload_script%% *}?"; then
    response=$($upload_script "$file")
    info "$response"
    url=$(command grep -m1 -oP 'https://[[:alnum:]?=%/_.:,;~@!#$&()*+-]+' <<< "$response")
    xclip -r <<< "$url"
  fi
  # ask "Delete $file?" && rm "$file"
fi