#!/bin/sh
# This makes an Internet Archive item into a git-annex special remote.
#
# Dependencies: curl, jq
#
# Install in PATH, and then use as follows:
# 	git-annex initremote iaitem type=external encryption=none \
# 		externaltype=internetarchive importtree=yes \
# 		item=<item name here>
#	git-annex import master --from iaitem
#	git-annex merge iaitem/master
#
# To limit the files that are imported to a particular extension use eg:
# 	git-annex wanted iaitem include="*.mp3"
#
# Copyright 2013-2026 Joey Hess; licenced under the GNU GPL version 3 or higher.
set -e
getconfig () {
	echo GETCONFIG item
	read resp
	item=$(echo "$resp" | sed 's/^VALUE \?//')
}

echo VERSION 2
while read line; do
	set -- $line
	case "$1" in
		INITREMOTE)
			getconfig
			if [ -z "$item" ]; then
				echo INITREMOTE-FAILURE "Specify item="
			else
				echo INITREMOTE-SUCCESS
			fi
		;;
		PREPARE)
			getconfig
			echo PREPARE-SUCCESS
		;;
		LISTIMPORTABLECONTENTS)
			curl --silent "https://archive.org/metadata/$item/files" | \
				jq -r '.result[] | (.name, .size, .sha1)' | \
			while read name; do
				read size
				read sha1
				if [ "$sha1" != null ]; then
					echo IMPORTABLECONTENT "$size" "$name"
					echo IMPORTABLECONTENTIDENTIFIER "$sha1"
				fi
			done
			echo IMPORTABLECONTENTEND
		;;
		RETRIEVEIMPORT)
			echo RETRIEVEIMPORT-URL "https://archive.org/download/$item/$importlocation"
		;;
		CHECKPRESENTIMPORT)
			key="$2"
			echo CHECKPRESENT-URL "$key" "https://archive.org/download/$item//$importlocation"
		;;
		# Below is all the boilerplate needed to make this work as an
		# importtree-only remote.
		IMPORTSUPPORTED)
			echo IMPORTREQUIRED
		;;
		IMPORT)
			shift 1
			importlocation="$@"
		;;
		INITREMOTE)
			echo INITREMOTE-SUCCESS
		;;
		*)
			echo UNSUPPORTED-REQUEST
		;;
	esac
done