watchrender

#!/bin/bash

SERVER=/home/paper_server;
LOG="$SERVER/logs/latest.log";
DYNMAP="$SERVER/plugins/dynmap";
CONFIG="$DYNMAP/configuration.txt";
WORLDS="$DYNMAP/worlds.txt";

TTY=$(tty);

if [[ $# -ge 1 ]]; then
	PREC=$1;
else
	PREC=2;
fi;

function swap() {
	TEMP="${!1}";
	eval $1="\"${!2}\"";
	eval $2="\"$TEMP\"";
}

function nth() {
	N=$1;
	for I in $(eval echo {1..$N}); do
		shift;
	done;
	echo $1;
}

function print_assoc() {
	echo -n '(';
	for I in $(eval echo "\"\${!$1[@]}\""); do
		eval DATA="\"\${$1[$I]}\"";
		DATA="${DATA//\\/\\\\}";
		echo -n " [$I]=\"${DATA//\"/\\\"}\"";
	done;
	echo ' )';
}

declare -Ag PREFIX_MAP
function map_prefix() {
	W="$1";
	M="$2";
	if [[ -n "${PREFIX_MAP[$W]}" ]]; then
		declare -A PREFIX_MAP2=${PREFIX_MAP[$W]};
		if [[ -n "${PREFIX_MAP2[$M]}" ]]; then
			eval $3="\"${PREFIX_MAP2[$M]}\"";
			return;
		fi;
	else
		declare -A PREFIX_MAP2;
	fi;
	WNAMEPAT='^ *- *name:';
	MAPSPAT='^ +maps:';
	CLASSPAT='^ +- *class:';
	MNAMEPAT='^ +name:';
	MPREFIXPAT='^ +prefix:';
	W=$(grep -E "$WNAMEPAT *$1 *\$" "$WORLDS" | head -n 1);
	WP=0;
	MP=0;
	NAME='';
	PREFIX='';
	IFS2='';
	swap IFS IFS2
	while read L; do
		swap IFS IFS2;
		echo "$L" | grep -Eq "$WNAMEPAT" && WP=0;
		[[ "$L" == "$W" ]] && WP=1;
		if [[ $WP -eq 1 && $MP -eq 1 ]]; then
			if echo "$L" | grep -Eq "$CLASSPAT"; then
				NAME='';
				PREFIX='';
			fi;
			if echo "$L" | grep -Eq "$MNAMEPAT"; then
				NAME="$(echo "$L" | sed -E "s/($MNAMEPAT *| *\$)//g")";
			fi
			if echo "$L" | grep -Eq "$MPREFIXPAT"; then
				PREFIX="$(echo "$L" | sed -E "s/($MPREFIXPAT *| *\$)//g")";
			fi
			if [[ -n "$NAME" && -n "$PREFIX" && "$NAME" == "$2" ]]; then
				PREFIX_MAP2[$NAME]=$PREFIX
				PREFIX_MAP[$WORLD]="$(print_assoc PREFIX_MAP2)";
				eval $3="\"$PREFIX\"";
				return;
			fi;
		fi;
		echo "$L" | grep -Eq "$MAPSPAT" && MP=1;
		swap IFS IFS2;
	done < "$WORLDS";
	swap IFS IFS2;
	return 1;
}

TPATHPAT=' *tilespath:';
TILESPATH="$(grep "$TPATHPAT" "$DYNMAP/configuration.txt" | sed -E "s/($TPATHPAT *| *\$)//g")";
TILES="$DYNMAP/$TILESPATH";
MULT=100;
DONE=$MULT;
LAST=0;
if [[ $PREC -gt 0 ]]; then
	for I in $(eval echo {1..$PREC}); do
		eval MULT="\${MULT}0";
	done;
	DONE=$(echo $MULT | sed -E 's/^100(0*)$/100.\1/');
fi
LASTMSG=0;
while true; do
	[[ $LAST -ne 0 ]] && sleep 1;
	LINE=$(tail -n 100 "$LOG" \
		| grep -E "Full render of map '[^']*' of '[^']*' in progress - [0-9]* tiles rendered" \
		| tail -n 1);
	[[ -z "$LINE" ]] && break;
	CURRENT=$(echo "$LINE" | grep -Eo '[0-9]+ tiles' | grep -Eo '[0-9]+');
	[[ $CURRENT -eq $LAST ]] && continue;
	LAST=$CURRENT
	TEMP=( $(echo "$LINE" | grep -Eo "'[^']+'" | grep -Eo "[^']+") );
	MAP="${TEMP[0]}";
	WORLD="${TEMP[1]}";
	map_prefix "$WORLD" "$MAP" MAPDIR;
	MAPTILES="$TILES/$WORLD/$MAPDIR";
	TOTAL=$(ls "$MAPTILES"/* | wc -l);
	PROGRESS=$(($CURRENT*$MULT/$TOTAL));
	while [[ ${#PROGRESS} -le $PREC ]]; do
		eval PROGRESS="0\$PROGRESS";
	done;
	[[ $PREC -gt 0 ]] \
	&& PROGRESS=$(echo $PROGRESS | sed -E 's/^([0-9]+)([0-9]{'$PREC'})$/\1.\2/');
	MSG="$(echo -e "\rFull render of $WORLD:$MAP - rendered $CURRENT of $TOTAL expected tiles ($PROGRESS %)")";
	echo -n "$MSG";
	if [[ ${#MSG} -lt $LASTMSG ]]; then
		for I in $(eval echo {1..$(($LASTMSG-${#MSG}))}); do
			echo -n ' ';
		done;
	fi;
	MAXMSG=${#MSG};
	[[ "$PROGRESS" == "$DONE" ]] && break;
done;
echo '';