#! /usr/bin/perl -w
# Woman's Voice
# 1-subs_counter.cgi: The subscriber counter.

#  Copyright (c) 2003-2021 imacat.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

# Author: imacat <imacat@mail.imacat.idv.tw>
# First written: 2003-05-17

use 5.008;
use strict;
use warnings;
use lib $ENV{"DOCUMENT_ROOT"} . qw(/magicat/lib/perl5);
use Selima::wov;
local $SIG{"__DIE__"} = \&http_500;
my $d = new Selima::Destroy;
# Prototype declaration
sub main();
sub get_counter();
sub html_image($);

use Fcntl qw(:flock :seek);
use GD;
use IO::NestedCapture qw(CAPTURE_STDOUT);

use constant DATA_FILE => "/var/lib/mailman/lists/wov/config.pck";
use constant COUNTER_PROG => "/usr/libexec/total_members";
use constant LISTNAME => "wov";
use vars qw(@FGCOLOR @BGCOLOR $FONT);
@FGCOLOR = (0, 0, 0);           # #000000 Black
@BGCOLOR = (255, 255, 255);     # #FFFFFF White
$FONT = gdLargeFont;
use constant TRANSPARENT => 1;
initenv(    -allowed    => [qw(GET HEAD)],
            -session    => 0,
            -dbi        => DBI_NONE,
            -lastmod    => 1,
            -lmfiles    => [DATA_FILE],
            -multilang  => 0);

use vars qw($COUNTER $MTIME);

main;
exit 0;

sub main() {
    local ($_, %_);
    
    get_counter();
    html_image($COUNTER);
    
    return;
}

# get_counter: Get the subscriber counter
sub get_counter() {
    local ($_, %_);
    my $OUT;
    
    # Obtain the mtime of the subscriber database file
    $_ = (stat DATA_FILE)[9];
    # We should update the counter
    if (!defined $MTIME || $MTIME != $_) {
        # Update the timestamp
        $MTIME = $_;
        @_ = (COUNTER_PROG, LISTNAME);
        open $OUT, "-|", @_         or http_500 COUNTER_PROG . ": $!";
        defined($COUNTER = <$OUT>)  or http_500 COUNTER_PROG . ": $!";
        close $OUT                  or http_500 COUNTER_PROG . ": $!";
        chomp $COUNTER;
    }
    
    return $COUNTER;
}

# html_image: Make the image from the counter value 
sub html_image($) {
    local $_;
    my ($counter, $image, $width, $height, $fgcolor, $bgcolor);
    $counter = $_[0];
    
    # Group the counter with commas at thousand digits.
    $counter = fmtno($counter);
    
    # Initialize the image object
    # Get the width and height
    $width = $FONT->width * (length $counter);
    $height = $FONT->height;
    # Create an image object
    $image = GD::Image->new($width, $height);
    # Create the forground/background color objects
    $fgcolor = $image->colorAllocate(@FGCOLOR);
    $bgcolor = $image->colorAllocate(@BGCOLOR);
    
    # Draw the image
    # Set the transparent background
    $image->transparent($bgcolor) if TRANSPARENT;
    # Paint the background
    $image->filledRectangle(0, 0, $width, $height, $bgcolor);
    # Write the text
    $image->string($FONT, 0, 0, $counter, $fgcolor);
    
    # Output
    $CONTENT_TYPE = "image/png";
    binmode IO::NestedCapture->instance->{"STDOUT_current"}[-1], ":raw";
    print $image->png;
    
    return;
}