#!/bin/bash

# This script adds top-level tags to your XML files.
# - XML header
# - <canto> and <terzine> tags with attributes

echo -e "\nAdding top-level tags."

for file in *;
do
	if [[ "$file" != 'top-level-tags.sh' ]]; then
		CANTO_NUM="$(echo "'$file'" | tr -d -c 0-9)"	# get canto number
		if [[ "$file" == inferno* ]]; then
			COMM_NUM="$CANTO_NUM"			# same as inferno canto number
		elif [[ "$file" == purgatorio* ]]; then
			COMM_NUM="$((CANTO_NUM + 34))"		# add 34 if in purgatory
		else
			COMM_NUM="$((CANTO_NUM + 67))"		# add 68 if in paradise
		fi
		# Add tags to first line of file
		sed -i '1s/^/<?xml version="1.0" encoding="UTF-8"?>\n\n<canto num=~CANTO_NUM~ num_comm=~COMM_NUM~>\n\t<terzine>\n/' "$file"
		# Replace canto number and comedy number
		sed -i "s/~CANTO_NUM~/\"$CANTO_NUM\"/" "$file"
		sed -i "s/~COMM_NUM~/\"$COMM_NUM\"/" "$file"
		# Add tags to end of file
		echo -e "\t</terzine>" >> "$file"
		echo -e "</canto>" >> "$file"
		# Add a `.xml` extension
		mv "$file" "$file.xml"
	fi
done