# - Berserks.bashlib -
# API library for Berserks
# Handles creation/loading of XDP/BPF maps from LOADFILE

# Globals expected:
#   LOADFILE   – path to xdp.Loadfile.*
#   TARGET_IPSET – name of ipset processed (informational)
#   POOL       – Watcher pool directory
#   ME         – program name (Berserks)

#--- helper: map format validator ---
_bers_map_validate_line() {
	sed -e 's/#.*//' -e 's/[ \t]*$//' | grep -E '^[0-9\.\/]+$'
}

###
# Create the guts for XDP/BPF operaion
###
prepare() {
# $1	- The IPSET name that is over-rules	
local funtag="[${FUNCNAME[0]}]"
local	caller_id=$(caller)

	echo "$funtag Preparing XDP/BPF operation for $ME/$caller_id"
	prepare_xdp
	prepare_bpf
	#probably other preparations
	load_bpf
}

prepare_xdp() {
local funtag="[${FUNCNAME[0]}]"
:
}

prepare_bpf() {
local funtag="[${FUNCNAME[0]}]"
:
}

load_bpf() {
local funtag="[${FUNCNAME[0]}]"
:
}


#--- create BPF map from LOADFILE ---
mk_bpf_map() {
local funtag="[${FUNCNAME[0]}]"
local	mapfile="$POOL/${ME}.bpfmap"
local	tmpmap="$POOL/${ME}.bpfmap.tmp"

	[ ! -s "$LOADFILE" ] && {
		echo "$funtag: LOADFILE '$LOADFILE' is empty or missing"
		return 0
	}

	# Normalize IP/CIDR entries and write to map
	>"$tmpmap"
	while IFS= read -r line; do
		_valid=$(_bers_map_validate_line <<<"$line")
		[ -z "$__valid" ] && continue
		echo "$__valid" >>"$tmpmap"
	done < "$LOADFILE"

	mv "$tmpmap" "$mapfile"
	echo "$ftag: written normalized BPF-map: $mapfile"

	# Hook for future XDP loader logic
	return 0
}

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