#!/bin/sh
########################################
# name: wydir
# desc: run `wyrics` over every song in
#       a directory of given file-ext
# main: Jaidyn Ann
#       <jadedctrl@teknik.io>
# lisc: CC 0
########################################


# STRING STRING --> STRING
# Return a version of a filename suitable for making a
# query. Replace "_" with spaces, get rid of file-ext.
function query_name {
	local filename="$1"
	local suffix="$2"

	basename "$filename" ".$suffix"
}

# STRING --> STRING
# Return the name of a file's lyrics text-file.
# Will be the full-name + .txt
function text_name {
	local filename="$1"
	echo "${filename}.txt"
}



# --------------------------------------
# invocation

function usage {
	echo "usage: wydir artist file-ext"
	echo "       'file-ext' should be the ext to songs in this dir"
	echo "       'artist'   the songs' artist"
	exit 2
}

# --------------------------------------

ARTIST="$1"
SUFFIX="$2"

if test -z "$SUFFIX"; then
	usage
fi

for file in ./*.$SUFFIX; do
	echo "... $(query_name "$file" "$SUFFIX") ..."
	name="$(query_name "$file" "$SUFFIX")"
	lyrics="$(wyrics "$ARTIST" "$name")"

	if test -n "$lyrics"; then
		echo "$lyrics" > "$(text_name "$file")"
	fi
done