mirror of
https://github.com/skaringa/water-counter.git
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120 lines
2.4 KiB
Perl
Executable File
120 lines
2.4 KiB
Perl
Executable File
#!/usr/bin/perl
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#
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# CGI script to create image using RRD graph
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use CGI qw(:all);
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use RRDs;
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use POSIX qw(locale_h);
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$ENV{'LANG'}='de_DE.UTF-8';
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setlocale(LC_ALL, 'de_DE.UTF-8');
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# path to database
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$rrd='../../water-counter/water.rrd';
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# force to always create image from rrd
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#$force=1;
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$query=new CGI;
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#$query=new CGI("type=consumweek&size=small");
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$size=$query->param('size');
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$type=$query->param('type');
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if ($size eq 'big') {
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$width=900;
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$height=700;
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$size="b";
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} else {
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$width=500;
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$height=160;
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$size="s";
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}
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die "invalid type\n" unless $type =~ /(count|consum)(day|week|month|year)/;
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$ds=$1;
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$range=$2;
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$filename="/tmp/wai${type}_${size}.png";
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# create new image if existing file is older than rrd file
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my $maxdiff = 10;
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if ((mtime($rrd) - mtime($filename) > $maxdiff) or $force) {
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$tmpfile="/tmp/wai${type}_${size}_$$.png";
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# call sub to create image according to type
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&$ds($range);
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# check error
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my $err=RRDs::error;
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die "$err\n" if $err;
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rename $tmpfile, $filename;
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}
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# feed image to stdout
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open(IMG, $filename) or die "can't open $filename";
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print header('image/png');
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print <IMG>;
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close IMG;
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# end MAIN
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# Return modification date of file
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sub mtime {
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my $file=shift;
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my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$fsize,
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$atime,$mtime,$ctime,$blksize,$blocks)
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= stat($file);
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return $mtime;
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}
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sub count {
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my $range = shift;
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my @opts=(
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"-w", $width,
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"-h", $height,
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"-s", "now - 1 $range",
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"-e", "now",
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"-D",
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"-Y",
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"-A");
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RRDs::graph($tmpfile,
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@opts,
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"DEF:counter=$rrd:counter:LAST",
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"LINE2:counter#000000:Zähler",
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"VDEF:countlast=counter,LAST",
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"GPRINT:countlast:%.3lf m³"
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);
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}
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sub consum {
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my $range = shift;
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my @opts=(
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"-w", $width,
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"-h", $height,
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"-D",
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"-Y",
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"-A",
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"-e", "now",
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"-s"
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);
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if ($range eq 'month') {
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push(@opts, "now - 30 days");
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} else {
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push(@opts, "now - 1 $range");
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}
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if ($range eq 'day') {
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RRDs::graph($tmpfile,
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@opts,
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"DEF:consum=$rrd:consum:AVERAGE",
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"CDEF:conlpmin=consum,60000,*",
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"CDEF:conlpd=conlpmin,60,*,24,*",
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"VDEF:conlpdtotal=conlpd,AVERAGE",
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"GPRINT:conlpdtotal:Total %4.0lf l/d",
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"LINE2:conlpmin#00FF00:Verbrauch [l/min]"
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);
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} else {
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RRDs::graph($tmpfile,
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@opts,
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"DEF:consum=$rrd:consum:AVERAGE",
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"CDEF:conlpd=consum,60000,*,60,*,24,*",
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"LINE2:conlpd#00FF00:l/d"
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);
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}
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}
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