#!/bin/bash

# Script to replace the [header] string of each .js script
# with the contents of the file 'header.txt'.
# Expects a valid path for the output of the files.
#
# > sh ./addheader.sh output_folder

if [ -z $1 ]; then
	echo "Please specify an output folder."
	exit 1
fi

# A bit of a cumbersome workaround
# as the script won't be called from the current folder:
CURRENT_PATH=$(pwd)    # path from where this script has been called
TARGET_PATH=$(pwd)/$1  # path to the copied .js files
SCRIPT_PATH=${0%/*}    # path to this script

if [[ $SCRIPT_PATH -ef $TARGET_PATH ]];  then
	echo "Can’t overwrite the current files."
	exit 1
fi

RED='\033[0;31m'
BLUE='\033[0;34m'
PURPLE='\033[0;35m'
NC='\033[0m'
echo "${PURPLE}Writing headers...${NC}"

cd $SCRIPT_PATH

EXPR_1="/\[header\]/r header.txt" # Insert the contents of _header.txt after [header]
EXPR_2="/\[header\]/d"            # Delete the line with [header]

for folder in `find ./ -mindepth 1 -type d`; do
	# echo "creating $TARGET_PATH/$folder..."

	mkdir -p $TARGET_PATH/$folder

	for file in ./$folder/*.js; do
		P=$(echo $file | sed 's/\.\///g') # prettier output
		echo "Writing $P..."
		sed -e "$EXPR_1"  -e "$EXPR_2" "$file" > "$TARGET_PATH/$file"
	done
done
echo "${PURPLE}...done!${NC}"

# Restore folder
cd $CURRENT_PATH