#!/usr/bin/perl -w
#
# This script is invoked when the YPP SC PCTB client phones home to
# provide updated character set OCR data or updated screenshot pixmap
# interpretation (island name) data.
#
# The client will also phone home anyway to fetch the latest parsedb
# before 
#
# This allows me (the operator of the SC server) to:
#    - review the choices made by the user
#    - if they are correct, incorporate them in the next client version
#    - if they are wrong, incorporate fixes of them, or contradictions of them,
#      in

# The information reported 
# The SC PCTB client does this so that 

use strict (qw(vars));

$CGI::POST_MAX= 65536;
$CGI::DISABLE_UPLOADS= 1;

use CGI qw/:standard -private_tempfiles/;


#---------- pixmaps ----------

sub parseentryin_pixmap ($) {
    my ($entry_in) = @_;
    $entry_in =~
	m/^(\w+ \- \w[-+'"#! 0-9a-z]*\w)\nP3\n([1-9]\d{1,3}) ([1-9]\d{1,3})\n255\n/s or die; # ']);
    my ($def,$w,$h)= ($1, $2+0, $3+0);
    my @d= grep { m/./ } split /\s+/, $';
    @d == $w*$h*3 or die "$d[0]|$d[1]|...|$d[$#d-1]|$d[$#d] ?";
    map {
	m/\D/ and die "$& ?";
	$_ += 0;
	$_ >= 0 or die "$_ ?";
	$_ <= 255 or die "$_ ?";
    } @d;
    my $ppm= "P3\n$w $h\n255\n";
    my $di=0;
    for (my $y=0; $y<$h; $y++) {
	for (my $x=0; $x<$w; $x++, $di+=3) {
#print STDERR ">$x,$y,$di,",scalar(@d),"<\n";
	    $ppm .= sprintf "  %3d %3d %3d", @d[$di..$di+2];
	}
	$ppm .= "\n";
    }

    ppmtopgm | pnmscale -width 79 | pnmnorm -bpercent 40 -wpercent 10 | pgmtopbm -threshold

 <ship-ahoy.ppm ppmtopgm | pnmscale -width 79 | pnmnorm -bpercent 40 -wpercent 10 | pgmtopbm -threshold | pbmtoascii | cut -c1-79
	
    my $entry= "$def\n$ppm";
    return ('',$def,$entry);
}

#---------- characters ----------

#---------- main program ----------

my $path= path_info();
my $entry_in= param('entry');
defined $entry_in or die;

my $owner= `whoami`; $? and die $?;

my $kind;

if ($path =~ /(pixmap|char)/) {
    $kind=$1;
} else {
    die "$path ?";
}

my ($ctx,$def,$entry)= ${"parseentryin__$kind"}($entry_in);

my $summary= <<END
To: $owner
Subject: yppsc dictionary update

Context:    $kind $ctx
Definition: $def

END
    ;


    
    print $entry or die $!;
} else {
    die "$path ?";
}