package DXLog;
-use FileHandle;
+require Exporter;
+@ISA = qw(Exporter);
+@EXPORT = qw(Log Logclose);
+
+use IO::File;
use DXVars;
-use DXDebug;
use DXUtil;
use Julian;
+
use Carp;
use strict;
+use vars qw($log);
+
+$log = new('log', 'dat', 'm');
+
+# create a log object that contains all the useful info needed
+# prefix is the main directory off of the data directory
+# sort is 'm' for monthly, 'd' for daily
+sub new
+{
+ my ($prefix, $suffix, $sort) = @_;
+ my $ref = {};
+ $ref->{prefix} = "$main::data/$prefix";
+ $ref->{suffix} = $suffix if $suffix;
+ $ref->{'sort'} = $sort;
+
+ # make sure the directory exists
+ mkdir($ref->{prefix}, 0777) unless -e $ref->{prefix};
+ return bless $ref;
+}
+
+# open the appropriate data file
+sub open
+{
+ my ($self, $year, $thing, $mode) = @_;
+
+ # if we are writing, check that the directory exists
+ if (defined $mode) {
+ my $dir = "$self->{prefix}/$year";
+ mkdir($dir, 0777) if ! -e $dir;
+ }
+
+ $self->{fn} = sprintf "$self->{prefix}/$year/%02d", $thing if $self->{'sort'} eq 'm';
+ $self->{fn} = sprintf "$self->{prefix}/$year/%03d", $thing if $self->{'sort'} eq 'd';
+ $self->{fn} .= ".$self->{suffix}" if $self->{suffix};
+
+ $mode = 'r' if !$mode;
+ $self->{mode} = $mode;
+
+ my $fh = new IO::File $self->{fn}, $mode, 0666;
+ return undef if !$fh;
+ $fh->autoflush(1) if $mode ne 'r'; # make it autoflushing if writable
+ $self->{fh} = $fh;
+
+ $self->{year} = $year;
+ $self->{thing} = $thing;
+
+# DXDebug::dbg("dxlog", "opening $self->{fn}\n");
+
+ return $self->{fh};
+}
+
+# open the previous log file in sequence
+sub openprev
+{
+ my $self = shift;
+ if ($self->{'sort'} eq 'm') {
+ ($self->{year}, $self->{thing}) = Julian::subm($self->{year}, $self->{thing}, 1);
+ } elsif ($self->{'sort'} eq 'd') {
+ ($self->{year}, $self->{thing}) = Julian::sub($self->{year}, $self->{thing}, 1);
+ }
+ return $self->open($self->{year}, $self->{thing}, @_);
+}
+
+# open the next log file in sequence
+sub opennext
+{
+ my $self = shift;
+ if ($self->{'sort'} eq 'm') {
+ ($self->{year}, $self->{thing}) = Julian::addm($self->{year}, $self->{thing}, 1);
+ } elsif ($self->{'sort'} eq 'd') {
+ ($self->{year}, $self->{thing}) = Julian::add($self->{year}, $self->{thing}, 1);
+ }
+ return $self->open($self->{year}, $self->{thing}, @_);
+}
+
+# convert a date into the correct format from a unix date depending on its sort
+sub unixtoj
+{
+ my $self = shift;
+
+ if ($self->{'sort'} eq 'm') {
+ return Julian::unixtojm(shift);
+ } elsif ($self->{'sort'} eq 'd') {
+ return Julian::unixtoj(shift);
+ }
+ confess "shouldn't get here";
+}
+
+# write (actually append) to a file, opening new files as required
+sub write
+{
+ my ($self, $year, $thing, $line) = @_;
+ if (!$self->{fh} ||
+ $self->{mode} ne ">>" ||
+ $year != $self->{year} ||
+ $thing != $self->{thing}) {
+ $self->open($year, $thing, ">>") or confess "can't open $self->{fn} $!";
+ }
+
+ return $self->{fh}->print("$line\n");
+}
+
+# write (actually append) using the current date to a file, opening new files as required
+sub writenow
+{
+ my ($self, $line) = @_;
+ my $t = time;
+ my @date = $self->unixtoj($t);
+ return $self->write(@date, $line);
+}
+
+# write (actually append) using a unix time to a file, opening new files as required
+sub writeunix
+{
+ my ($self, $t, $line) = @_;
+ my @date = $self->unixtoj($t);
+ return $self->write(@date, $line);
+}
+
+# close the log file handle
+sub close
+{
+ my $self = shift;
+ undef $self->{fh}; # close the filehandle
+ delete $self->{fh};
+}
+
+sub DESTROY
+{
+ my $self = shift;
+ undef $self->{fh}; # close the filehandle
+ delete $self->{fh} if $self->{fh};
+}
+
+# log something in the system log
+# this routine is exported to any module that declares DXLog
+# it takes all its args and joins them together with the unixtime writes them out as one line
+# The user is responsible for making sense of this!
+sub Log
+{
+ my $t = time;
+ $log->writeunix($t, join('^', $t, @_) );
+}
+
+sub Logclose
+{
+ $log->close();
+}
+1;