#!/bin/bash

# Replace with your danbooru login and API key
LOGIN="youridhere"
API_KEY="your_api_key_here_xxxxx"


# This script takes filenames
# on stdin, and then downloads from danbooru to local directories,
# matching the format.
# The format should be:
#   data-xxxx/filename.jpg

#########################################################################
#
# script internals only, beyond this point.
#########################################################################



# This func takes an image pathname, and calculates the 
# danbooru image id from the filename.
# It then grabs the original image,
# and the tag info (for .txt), if the jpg does not already exist
download_image(){
	[[ -f $1 ]] && return


	# strip off leading directory names, and file extensions
	id=${1##*/}
	id=${id%*.???}

	IMAGE_ID=$id
	imgfile=$IMAGE_ID.jpg
	
	POST_DATA=$(curl -q -s -u "$LOGIN:$API_KEY" "https://danbooru.donmai.us/posts/$IMAGE_ID.json")
	# debug
	#echo $POST_DATA >/tmp/post_data.json

	IMAGE_URL=$(echo $POST_DATA | jq -r '.file_url')
	# Using _general gives us the non-artist/character tags
	# Remove _general if you want that included
	TAG_INFO=$(echo $POST_DATA | jq -r '.tag_string_general')

	if [[ "$IMAGE_URL" == "null" ]] ; then
		echo ERROR RETREIVING POST
		echo DEBUG:
		echo $POST_DATA
	else
		echo Downloading to  $imgfile
		curl -s  "$IMAGE_URL" > $imgfile
		tagfile=$IMAGE_ID.txt
		[[ -f $tagfile ]] || echo "$TAG_INFO" >$tagfile
	fi


}


while read oneline ; do
	download_image $oneline
done