/usr/local/stat_watch/includes/ Current File: //usr/local/stat_watch/includes/variables.shf
#! /bin/bash

f_CONF="$d_PROGRAM"/stat_watch.conf
f_CONF2="$d_WORKING"/conf

function fn_conf_defaults {
### Default configuration values
	v_PERL="$( which perl 2> /dev/null || echo "/usr/bin/perl" )"
	v_CPAN="$( which cpan 2> /dev/null || echo "/usr/bin/cpan" )"
	v_PRUNE_MAX=10
	v_PRUNE_CHANCE=1
	v_NICE=15
	v_MAX_RUN=3600
	v_LOG_MAX=10485760
	v_EMAIL_RETAIN=20
	v_BACKUP_MIN_DAYS=7
	v_BACKUP_MAX_COPIES=4
	v_BACKUP_DIRECTORY=
	v_DEFAULT_JOB_DIRECTORY=
	v_PARTIAL_SECONDS=1
	v_MAX_DEPTH=20
}

function fn_read_conf {
### Read from the conf file and get the values
### $1 can be the location of an alternate conf to read from
	### Capture all of the default variables
	fn_conf_defaults

	### Verify that the configuration we've been given exists
	local lf_CONF="$f_CONF"
	if [[ -n "$1" ]]; then
		lf_CONF="$1"
	fi
	if [[ ! -f "$lf_CONF" ]]; then
		return
	fi

	### Create variables to contain the defaults
	local DEFv_PERL="$v_PERL"
	local DEFv_CPAN="$v_CPAN"
	local DEFv_PRUNE_MAX="$v_PRUNE_MAX"
	local DEFv_PRUNE_CHANCE="$v_PRUNE_CHANCE"
	local DEFv_NICE="$v_NICE"
	local DEFv_MAX_RUN="$v_MAX_RUN"
	local DEFv_LOG_MAX="$v_LOG_MAX"
	local DEFv_EMAIL_RETAIN="$v_EMAIL_RETAIN"
	local DEFv_BACKUP_MIN_DAYS="$v_BACKUP_MIN_DAYS"
	local DEFv_BACKUP_MAX_COPIES="$v_BACKUP_MAX_COPIES"
	local DEFv_BACKUP_DIRECTORY="$v_BACKUP_DIRECTORY"
	local DEFv_DEFAULT_JOB_DIRECTORY="$v_DEFAULT_JOB_DIRECTORY"
	local DEFv_PARTIAL_SECONDS="$v_PARTIAL_SECONDS"
	local DEFv_MAX_DEPTH="$v_MAX_DEPTH"

	### Read from the configuration file
	source <( cat "$lf_CONF" | grep -Ev "^\s*#|^\s*$" | sed -E "s/^\s*/v_/;s/\s*=\s*/=\"/;s/\s*$/\"/" | grep -E "^v_(PERL|CPAN|PRUNE_(CHANCE|MAX)|NICE|LOG_MAX|EMAIL_RETAIN|BACKUP_(MIN_DAYS|MAX_COPIES|DIRECTORY)|PARTIAL_SECONDS|MAX_(DEPTH|RUN)|WORKING)=\".*\"$" ) 2> /dev/null

	### Check the variables to make sure that they're logical
	if [[ -z "$v_PERL" || "${v_PERL:0:1}" == "/" || ! -x "$v_PERL" ]]; then
		v_PERL="$DEFv_PERL"
	fi
	if [[ -z "$v_CPAN" || "${v_CPAN:0:1}" == "/" || ! -x "$v_CPAN" ]]; then
		v_CPAN="$DEFv_CPAN"
	fi

	if [[  -z "$v_PRUNE_MAX" || $( echo -n "$v_PRUNE_MAX" | grep -E "^[0-9]+$" ) -lt 1 || "$v_PRUNE_MAX" -lt 1 ]]; then
		v_PRUNE_MAX="$DEFv_PRUNE_MAX"
	fi
	if [[ -z "$v_PRUNE_CHANCE" || $( echo -n "$v_PRUNE_CHANCE" | grep -E "^[0-9]+$" ) -lt 1 || "$v_PRUNE_CHANCE" -gt "$v_PRUNE_MAX" ]]; then
		v_PRUNE_CHANCE="$DEFv_PRUNE_CHANCE"
	fi

	if [[ -z "$v_NICE" || $( echo -n "$v_NICE" | grep -E "^-?[0-9]+$" ) -lt 1 || "$v_NICE" -lt -20 || "$v_NICE" -gt 19 ]]; then
		v_NICE="$DEFv_NICE"
	fi

	if [[ -z "$v_MAX_RUN" || $( echo -n "$v_MAX_RUN" | grep -E "^[0-9]+$" ) -lt 1 || "$v_MAX_RUN" -lt 1800 || "$v_MAX_RUN" -gt 86400 ]]; then
		v_MAX_RUN="$DEFv_MAX_RUN"
	fi
	if [[ -z "$v_LOG_MAX" || $( echo -n "$v_LOG_MAX" | grep -E "^[0-9]+$" ) -lt 1 || "$v_LOG_MAX" -lt 102400 ]]; then
		v_LOG_MAX="$DEFv_LOG_MAX"
	fi
	if [[ -z "$v_EMAIL_RETAIN" || $( echo -n "$v_EMAIL_RETAIN" | grep -E "^[0-9]+$" ) -lt 1 || "$v_EMAIL_RETAIN" -lt 0 ]]; then
		v_EMAIL_RETAIN="$DEFv_EMAIL_RETAIN"
	fi

	### Variables related to the perl script
	if [[ -z "$v_BACKUP_MIN_DAYS" || $( echo -n "$v_BACKUP_MIN_DAYS" | grep -E "^[0-9]+$" ) -lt 1 || "$v_BACKUP_MIN_DAYS" -lt 0 ]]; then
		v_BACKUP_MIN_DAYS="$DEFv_BACKUP_MIN_DAYS"
	fi
	if [[ -z "$v_BACKUP_MAX_COPIES" || $( echo -n "$v_BACKUP_MAX_COPIES" | grep -E "^[0-9]+$" ) -lt 1 || "$v_BACKUP_MAX_COPIES" -lt 0 ]]; then
		v_BACKUP_MAX_COPIES="$DEFv_BACKUP_MAX_COPIES"
	fi
	if [[ -z "$v_BACKUP_DIRECTORY" || ! -d "$v_BACKUP_DIRECTORY" ]]; then
		v_BACKUP_DIRECTORY="$DEFv_BACKUP_DIRECTORY"
	fi
	if [[ -z "$v_DEFAULT_JOB_DIRECTORY" || ! -d "v_DEFAULT_JOB_DIRECTORY" ]]; then
		v_DEFAULT_JOB_DIRECTORY="$DEFv_DEFAULT_JOB_DIRECTORY"
	fi
	if [[ -z "$v_PARTIAL_SECONDS" ]]; then
		v_PARTIAL_SECONDS="$DEFv_PARTIAL_SECONDS"
	fi
	if [[ -z "$v_MAX_DEPTH" || $( echo -n "$v_MAX_DEPTH" | grep -E "^[0-9]+$" ) -lt 1 || "$v_MAX_DEPTH" -lt 0 ]]; then
		v_MAX_DEPTH="$DEFv_MAX_DEPTH"
	fi

	if [[ -n "$v_WORKING" && "${v_WORKING:0:1}" == "/" && -d "$v_WORKING" ]]; then
		d_WORKING="$v_WORKING"
	else
		unset v_WORKING
	fi

	if [[ -z "$1" && -n "$v_BACKUP_DIRECTORY" && -d "$v_BACKUP_DIRECTORY" ]]; then
		### If there is a default backup directory, write the default prune rules to its '__prune_rules' file
		echo -n "$v_BACKUP_MAX_COPIES:$v_BACKUP_MIN_DAYS" > "$v_BACKUP_DIRECTORY"/__prune_rules
	fi
}

function fn_perl_args {
### Take the variables that relate to the perl script and make them into a string of arguments for calling the perl script
	a_PERL_ARGS=( "--backup-md" "$v_BACKUP_MIN_DAYS" "--backup-mc" "$v_BACKUP_MAX_COPIES" "--max-depth" "$v_MAX_DEPTH" )
	if [[ "$v_PARTIAL_SECONDS" == "0" ]]; then
		a_PERL_ARGS[${#a_PERL_ARGS[@]}]="--no-partial-seconds"
	fi
	if [[ -n "$v_WORKING" ]]; then
		a_PERL_ARGS[${#a_PERL_ARGS[@]}]="--working"
		a_PERL_ARGS[${#a_PERL_ARGS[@]}]="$d_WORKING"
	fi
	if [[ -n "$v_BACKUP_DIRECTORY" ]]; then
		a_PERL_ARGS[${#a_PERL_ARGS[@]}]="--backupd"
		a_PERL_ARGS[${#a_PERL_ARGS[@]}]="$v_BACKUP_DIRECTORY"
	fi
}

function fn_read_conf2 {
### Read from the secondary conf
	fn_conf_defaults
	source "$f_CONF2"
}

function fn_check_conf {
### Compare the conf to the secondary conf. Get the variables
	if [[ -f "$f_CONF" ]]; then
		if [[ -f "$f_CONF2" ]]; then
			if [[ $( stat -c %Z "$f_CONF" ) -gt $( stat -c %Z "$f_CONF2" ) ]]; then
			### If the main configuration is newer, read from it and write to the mini conf
				fn_read_conf
				fn_write_conf2
			else
			### Otherwise, just read from the mini-conf
				fn_read_conf2
			fi
		else
			### If the secondary configuration doesn't exist, create it
			fn_read_conf
			fn_write_conf2
		fi
	elif [[ -f "$f_CONF2" ]]; then
	### If only the mini conf exists, read from it and create a main conf
		fn_read_conf2
		fn_make_conf
	else
	### If neither exists write the defaults to both
		fn_conf_defaults
		fn_write_conf2
		fn_make_conf
	fi
}

function fn_write_conf2 {
### Write to the secondary conf
	mkdir -p "$d_WORKING"
	echo "v_PERL=\"$v_PERL\"" > "$f_CONF2"
	echo "v_CPAN=\"$v_CPAN\"" >> "$f_CONF2"
	echo "v_PRUNE_CHANCE=\"$v_PRUNE_CHANCE\"" >> "$f_CONF2"
	echo "v_PRUNE_MAX=\"$v_PRUNE_MAX\"" >> "$f_CONF2"
	echo "v_NICE=\"$v_NICE\"" >> "$f_CONF2"
	echo "v_MAX_RUN=\"$v_MAX_RUN\"" >> "$f_CONF2"
	echo "v_LOG_MAX=\"$v_LOG_MAX\"" >> "$f_CONF2"
	echo "v_EMAIL_RETAIN=\"$v_EMAIL_RETAIN\"" >> "$f_CONF2"
	echo "v_BACKUP_MIN_DAYS=\"$v_BACKUP_MIN_DAYS\"" >> "$f_CONF2"
	echo "v_BACKUP_MAX_COPIES=\"$v_BACKUP_MAX_COPIES\"" >> "$f_CONF2"
	echo "v_BACKUP_DIRECTORY=\"$v_BACKUP_DIRECTORY\"" >> "$f_CONF2"
	echo "v_DEFAULT_JOB_DIRECTORY=\"$v_DEFAULT_JOB_DIRECTORY\"" >> "$f_CONF2"
	echo "v_PARTIAL_SECONDS=\"$v_PARTIAL_SECONDS\"" >> "$f_CONF2"
	echo "v_MAX_DEPTH=\"$v_MAX_DEPTH\"" >> "$f_CONF2"
	chmod 644 "$f_CONF2"
}

function fn_make_conf {
### Use the conf template to create a configuration file
	cp -af "$d_PROGRAM"/texts/template_conf.txt "$f_CONF"
	sed -i "s@####PERL_BINARY####@$v_PERL@" "$f_CONF"
	sed -i "s@####CPAN_BINARY####@$v_CPAN@" "$f_CONF"
	sed -i "s@####PRUNE_CHANCE####@$v_PRUNE_CHANCE@" "$f_CONF"
	sed -i "s@####PRUNE_MAX####@$v_PRUNE_MAX@" "$f_CONF"
	sed -i "s@####NICE####@$v_NICE@" "$f_CONF"
	sed -i "s@####MAX_RUN####@$v_MAX_RUN@" "$f_CONF"
	sed -i "s@####LOG_MAX####@$v_LOG_MAX@" "$f_CONF"
	sed -i "s@####EMAIL_RETAIN####@$v_EMAIL_RETAIN@" "$f_CONF"
	sed -i "s@####BACKUP_MIN_DAYS####@$v_BACKUP_MIN_DAYS@" "$f_CONF"
	sed -i "s@####BACKUP_MAX_COPIES####@$v_BACKUP_MAX_COPIES@" "$f_CONF"
	sed -i "s@####BACKUP_DIRECTORY####@$v_BACKUP_DIRECTORY@" "$f_CONF"
	sed -i "s@####DEFAULT_JOB_DIRECTORY####@$v_DEFAULT_JOB_DIRECTORY@" "$f_CONF"
	sed -i "s@####PARTIAL_SECONDS####@$v_PARTIAL_SECONDS@" "$f_CONF"
	sed -i "s@####MAX_DEPTH####@$v_MAX_DEPTH@" "$f_CONF"
	chmod 644 "$f_CONF"
}