+++ /dev/null
-#
-# the dx spot handler
-#
-# Copyright (c) - 1998 Dirk Koopman G1TLH
-#
-# $Id$
-#
-
-package spot;
-
-use FileHandle;
-use DXVars;
-use DXDebug;
-use julian;
-
-@ISA = qw(julian);
-
-use strict;
-
-my $fp;
-my $maxdays = 60; # maximum no of days to store spots in the table
-my $prefix = "$main::data/spots";
-my @table = (); # the list of spots (held in reverse order)
-
-# read in n days worth of dx spots into memory
-sub init
-{
- my @today = julian->unixtoj(time); # get the julian date now
- my @first = julian->sub(@today, $maxdays); # get the date $maxdays ago
- my $count;
-
- mkdir($prefix, 0777) if ! -e $prefix; # create the base directory if required
- for (my $i = 0; $i < $maxdays; ++$i) {
- my $ref = spot->open(@first);
- if ($ref) {
- my $fh = $ref->{fh};
- my @out = ();
- while (<$fh>) {
- chomp;
- my @ent = split /\^/;
-
- push @spot::table, \@ent; # stick this ref to anon list on the FRONT of the table
-
- ++$count;
- }
- }
- @first = julian->add(@first, 1);
- }
- return $count;
-}
-
-# create a new spot on the front of the list, add it to the data file
-sub new
-{
- my $pkg = shift;
- my @spot = @_; # $freq, $call, $t, $comment, $spotter = @_
-
- # sure that the numeric things are numeric now (saves time later)
- $spot[0] = 0 + $spot[0];
- $spot[2] = 0 + $spot[2];
-
- # save it on the front of the list
- unshift @spot::table, \@spot;
-
- # compare dates to see whether need to open a other save file
- my @date = julian->unixtoj($spot[2]);
- $fp = spot->open(@date, ">>") if (!$fp || julian->cmp(@date, $fp->{year}, $fp->{day}));
- my $fh = $fp->{fh};
- $fh->print(join("\^", @spot), "\n");
-}
-
-# purge all the spots older than $maxdays - this is fairly approximate
-# this should be done periodically from some cron task
-sub purge
-{
- my $old = time - ($maxdays * 86400);
- my $ref;
-
- while (@spot::table) {
- my $ref = pop @spot::table;
- if (${$ref}[2] > $old) {
- push @spot::table, $ref; # put it back
- last; # and leave
- }
- }
-}
-
-# search the spot database for records based on the field no and an expression
-# this returns a set of references to the spots
-#
-# for string fields supply a pattern to match
-# for numeric fields supply a range of the format 'n > x && n < y' (the n will
-# changed to the correct field name) [ n is literally the letter 'n' ]
-#
-sub search
-{
- my ($pkg, $field, $expr, $from, $to) = @_;
- my $eval;
- my @out;
- my $ref;
- my $i;
-
- dbg('spot', "input expr = $expr\n");
- if ($field == 0 || $field == 2) { # numeric fields
- $expr =~ s/n/\$ref->[$field]/g; # swap the letter n for the correct field name
- } else {
- $expr = qq(\$ref->[$field] =~ /$expr/oi); # alpha expressions
- }
- dbg('spot', "expr now = $expr\n");
-
- # build up eval to execute
- $eval = qq(foreach \$ref (\@spot::table) {
- next if \$i < \$from;
- if ($expr) {
- unshift(\@out, \$ref);
- \$i++;
- last if \$to && \$i >= \$to;
- }
- });
- dbg('spot', "eval = $eval\n");
- eval $eval; # execute it
- return @out;
-}
-
-# open a spot file of the julian day
-sub open
-{
- my $pkg = shift;
- return julian->open("spot", $prefix, @_);
-}
-
-# close a spot file
-sub close
-{
- # do nothing, unreferencing or overwriting the $self will close it
-}
-
-1;