#!/bin/bash
#
# Author: Georg Voell - georg.voell@standby.cloud
# Version: @(#)print-header 3.1.0 05.06.2023 (c)2023 Standby.cloud
# Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl/
#
# This script can be used free of charge. Use it as is or customize as needed. It is not guaranteed to be
# error free and you will not be reimbursed for any damage it may cause.
#
#@  Reads a file and pretty prints a frame around the content.
#@
#@Usage: print-header [options] filename
#@  Options:
#@    -h, --help             : Displays helptext.
#@    -v, --version          : Displays the version of the script.
#@    -c, --color <colorcode>: Green colorcode e.g.: "\033[0;32m".
#@  Filename: A file with some content.
#@
#@Examples:
#@  echo "Hello world" > file.tmp
#@    Prints "Hello world" to file "file.tmp"
#@  print-header file.tmp
#@    /-------------\
#@      Hello world
#@    \-------------/
#
# Exit codes:
#  01: Unknown or wrong parameter.
#  99: User interrupt.
#
# See also:
#  **print-table**(1), **install-scripts**(1)
#
# Update history:
#
# V 2.0.0 11.06.2019 New version
# V 3.0.0 26.04.2020 Multi OS compatible
# V 3.0.1 11.06.2020 Using library
# V 3.0.2 20.04.2021 Rewritten using bash instead of tcsh
# V 3.1.0 05.06.2023 New copyright
#

script=${0}						# Name of this script
progstr=`basename "$script"`	# Basename of the script
progdir=`dirname "$script"`		# Dirname of the script

# Find executable bash library and source it
lib=`which lib.bash 2>/dev/null | sed 's|^no 'lib.bash' in .*||'`
if [ "$lib" != "" ]; then
	source "$lib"
else
	if [ -r "${progdir}/lib.bash" ]; then
		source "${progdir}/lib.bash"
	else
		echo "Unexpected error: Unable to locate bash library 'lib.bash'."
		exit 1
	fi
fi

# Set PATH to something useful
if [ "$WORKPATH" != "" ]; then
	PATH="$WORKPATH"
fi

# Preset
normal='\033[0m'
filename=""
color=""
len=0
longestline=0

# Check parameters: Loop until all parameters are used up
while [ $# -gt 0 ]; do
	pname=${1}
	case "$pname" in
		-v | --version)
			shift
			showversion=1
			;;
		-h | --help)
			shift
			showhelp=1
			;;
		-c | --color)
			shift
			if [ "$1" != "" ]; then
				color=${1}
				shift
			else
				errstr="Please specify a color code after parameter '$pname'."
			fi
			;;
		*)
			paramck=`echo "$1" | grep '^-'` # Types don't begin with '-'
			if [ "$filename" = "" -a "$paramck" = "" ]; then
				filename=${1}
			else
				errstr="Unknown parameter: '$1'."
			fi
			shift
	esac
done

# Check if filename is empty and file exists
if [ "$filename" = "" ]; then
	errstr="Please specify a file with values."
else
	if [ ! -f "$filename" ]; then
		errstr="File '$filename' does not exists."
	fi
fi

# Display help or error message
DisplayHelp

function PrintMarkerString() {
	local len=${1}
	local stype=`echo "$2" | tolower`
	
	local form=""
	local head=""
	local tail=""

	form=`printf "%-${len}s" | tr ' ' '-'`	# Right pad string with blanks and replace blanks with dash
	
	if [ "$stype" = "begin" ]; then
		if [ "$color" != "" ]; then
			head="${color}/-"
			tail="\\"
		else
			head="/-"
			tail="\\"
		fi
	else
		if [ "$color" != "" ]; then
			head="\\-"
			tail="/${normal}"
		else
			head="\\-"
			tail="/"
		fi
	fi
	
	# Print new string
	printf "${head}${form}${tail}"
	printf "\n"
}

### Main

while read line; do
	len=`echo "$line" | wc -m`
	# let len--

	if [ $len -gt $longestline ]; then
		longestline=$len
	fi
done < $filename

# Create begin string
PrintMarkerString "$longestline" "begin"

while read line; do
	line=`echo "$line" | tr '	' ' '`	# Convert tab to blank
	printf "  %s\n" "$line"
done < $filename

# Create begin string
PrintMarkerString "$longestline" "end"

# Cleanup and exit
Cleanup
exit $exitcode