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#!/usr/bin/perl -w
# NAME: msfs-fp.pl
# AIM: Read and show details of the MSFS2002 FLight Plan file
# 09/11/2010 geoff mclane http://geoffair.net/mperl
use strict;
use warnings;
use File::Basename;  # split path ($name,$dir,$ext) = fileparse($file [, qr/\.[^.]*/] )
use File::Spec; # File::Spec->rel2abs($rel); # we are IN the SLN directory, get ABSOLUTE from RELATIVE
use Cwd;
my $perl_dir = 'C:\GTools\perl';
unshift(@INC, $perl_dir);
require 'lib_utils.pl' or die "Unable to load 'lib_utils.pl'! Check location and \@INC content.\n";
require 'fg_wsg84.pl' or die "Unable to load fg_wsg84.pl ...\n";
# log file stuff
my ($LF);
my $pgmname = $0;
if ($pgmname =~ /(\\|\/)/) {
    my @tmpsp = split(/(\\|\/)/,$pgmname);
    $pgmname = $tmpsp[-1];
}
my $outfile = $perl_dir."\\temp.$pgmname.txt";
open_log($outfile);

# user variables
my $load_log = 0;
my $in_file = '';

my $debug_on = 0;
my $def_file = 'C:\Program Files\Microsoft Games\FS2002\flights\myflts\LFPZ2EHLE-vor.PLN';

### program variables
my @warnings = ();
my $cwd = cwd();
my $os = $^O;
my $verbosity = 0;
my %shown_diff = ();

sub VERB1() { return $verbosity >= 1; }
sub VERB2() { return $verbosity >= 2; }
sub VERB5() { return $verbosity >= 5; }
sub VERB9() { return $verbosity >= 9; }

sub show_warnings($) {
    my ($val) = @_;
    if (@warnings) {
        prt( "\nGot ".scalar @warnings." WARNINGS...\n" );
        foreach my $itm (@warnings) {
           prt("$itm\n");
        }
        prt("\n");
    } else {
        prt( "\nNo warnings issued.\n\n" );
    }
}

sub pgm_exit($$) {
    my ($val,$msg) = @_;
    if (length($msg)) {
        $msg .= "\n" if (!($msg =~ /\n$/));
        prt($msg);
    }
    show_warnings($val);
    close_log($outfile,$load_log);
    exit($val);
}


sub prtw($) {
   my ($tx) = shift;
   $tx =~ s/\n$//;
   prt("$tx\n");
   push(@warnings,$tx);
}

sub get_data_points() {
    my @data = qw( title description type routetype cruising_altitude
        departure_id departure_position destination_id
        departure_name destination_name );
    my %h = ();
    foreach  (@data) {
        $h{$_} = 1;
    }
    return \%h;
}

sub get_sample_output() {
    my $data = <<EOF;
[title] = [LFPZ to EHLE]
[description] = [LFPZ, EHLE]
[type] = [VFR]
[routetype] = [1]
[cruising_altitude] = [3500]
[departure_id] = [LFPZ, N48* 48.95', E2* 3.83', +000371.00]
[departure_position] = [12L]
[destination_id] = [EHLE, N52* 27.09', E5* 30.69', -000009.71]
[departure_name] = [St Cyr-L'ecole]
[destination_name] = [Lelystad]
[waypoint.0] = [LFPZ, A, N48* 48.95', E2* 3.83', +000371.00, ]
[waypoint.1] = [LFMVM, V+LOCWAY, N49* 33.15', E2* 29.27', +000000.00, ]
[waypoint.2] = [LFCMB, V+LOCWAY, N50* 13.69', E3* 9.09', +000000.00, ]
[waypoint.3] = [EBNIK, V+LOCWAY, N51* 9.90', E4* 11.03', +000000.00, ]
[waypoint.4] = [EHRTM, V+LOCWAY, N51* 58.42', E4* 28.86', +000000.00, ]
[waypoint.5] = [EHPAM, V+LOCWAY, N52* 20.09', E5* 5.53', +000000.00, ]
[waypoint.6] = [EHLE, A, N52* 27.09', E5* 30.69', -000009.71, ]
EOF
    return $data;
}

sub split_cvs($) {
    my ($txt) = @_;
    my @arr =();
    my ($len,$i,$ch,$qc,$tag);
    $len = length($txt);
    $qc = 0;
    $tag = '';
    for ($i = 0; $i < $len; $i++) {
        $ch = substr($txt,$i,1);
        if ($qc) {
            $tag .= $ch;
            $qc = 0 if ($ch eq '"');
        } elsif ($ch eq '"') {
            push(@arr,$tag) if (length($tag));
            $tag = '';
            $qc = 1;
        } elsif ($ch eq ',') {
            push(@arr,$tag) if (length($tag));
            $tag = '';
        } else {
            $tag .= $ch;
        }
    }
    push(@arr,$tag) if (length($tag));
    return @arr;
}

sub get_degs_lat_or_lon($) {
    my ($txt) = @_;
    my @arr = split(/\s+/,$txt);
    my $cnt = 0;
    my $args = '';
    my $degs = 0;
    my ($arg,$arg2,$deg1);
    foreach $arg (@arr) {
        $args .= ' ' if ($cnt);
       $args .= $arg;
       $cnt++;
        if ($cnt == 1) {
            $arg = substr($arg,1) if ($arg =~ /^\w/);
            $arg = substr($arg,0,length($arg)-1) if ($arg =~ /\D$/);
            $deg1 = $arg;
            $degs += $arg;
            #print "Arg 1 Degrees = $arg ($deg1) = $degs\n";
        } elsif ($cnt == 2) {
            $arg = substr($arg,0,length($arg)-1) if ($arg =~ /\D$/);
            $arg2 = $arg;
            $arg2 =~ s/\'//;
            $degs += ($arg2 / 60);
            $deg1 = ($arg2 / 60);
            #print "Arg 2 Minutes = $arg ($deg1) = $degs\n";
        } elsif ($cnt == 3) {
            $arg2 = $arg;
            $arg2 =~ s/\"//;
            $degs += ($arg2 / (60*60));
            $deg1 = ($arg2 / (60*60));
            #print "Arg 3 Seconds = $arg ($deg1) = $degs\n";
        } else {
            $deg1 = 0;
            #print "Arg 4+ = $arg ($deg1) = $degs\n";
        }
    }
    if ($txt =~ /(N|E)/i) {
        # as is
    } elsif ($txt =~ /(S|W)/i) {
        $degs *= -1;
    }
    return $degs;
}


sub get_d_ll($) {
    my ($pt) = @_;
    # [departure_id] = N48* 48.95', E2* 3.83', 
    $pt = trim_all($pt);
    my $len = length($pt);
    my $NSEW = substr($pt,0,1); # NSEW
    my ($i,$ch,$val,$num,$ok,$msg);
    my $dlatlon = 200.0;
    my $degs = 0;
    my $mins = 0;
    my $bgnlet = '';
    my $chkdegs = get_degs_lat_or_lon($pt);
    $ok = 0;
    $msg = "[v9] From: $pt:";
    #if ($pt =~ /^w/) {
    #    $bgnlet = substr($pt,0,1);
    #    $pt = substr($pt,1);
    #    $len = length($pt);
    #}
    $val = 0;
    # accumule a number
    for ($i = 1; $i < $len; $i++) {
        $ch = substr($pt,$i,1);
        if ($ch =~ /(\.|\d)/) {
            $val .= $ch;
        } else {
            $ok |= 1 if ($i > 1);
            last;
        }
    }
    $degs = $val;   # collect the degrees
    $msg .= " Degs $degs";
    $i++;
    # skip a space, or non-number
    for (; $i < $len; $i++) {
        $ch = substr($pt,$i,1);
        if ($ch =~ /(\.|\d)/) {
            $ok |= 2;
            last;
        } else {
            $val .= $ch;
        }
    }
    # $i++;
    # accumule a number
    $val = 0;
    for (; $i < $len; $i++) {
        $ch = substr($pt,$i,1);
        if ($ch =~ /(\.|\d)/) {
            $val .= $ch;
            $ok |= 4;
        } else {
            last;
        }
    }
    $mins += $val;
    $msg .= " Mins $mins";
    if ($ok && ($NSEW =~ /[NSEW]/i)) {
        $dlatlon = $degs + ($mins / 60);
        if ($NSEW =~ /(S|W)/) {
            $dlatlon *= -1;
        }
    }

    $i = abs($dlatlon - $chkdegs);
    if ( $i > 0.000001) {
        if (! defined $shown_diff{$pt} ) {
            $shown_diff{$pt} = 1;
            prtw("Have DIFF [$dlatlon] to [$chkdegs] = [$i]! CHECK CALCS on [$pt]\n");
        }
    }


    prt("$msg double = $dlatlon ($chkdegs)\n") if (VERB9());

    return $dlatlon;
}


#                   0     1            2          3
# [departure_id] = [LFPZ, N48* 48.95', E2* 3.83', +000371.00]
# [destination_id] = [EHLE, N52* 27.09', E5* 30.69', -000009.71]
sub get_ref_point($) {
    my ($equ) = @_;
    my @arr = split_cvs($equ);
    my $len = scalar @arr;
    my %h = ();
    my ($icao,$lat,$lon,$alt,$dlat,$dlon);
    if ($len == 4) {
        $icao = $arr[0];
        $lat  = $arr[1];
        $lon  = $arr[2];
        $alt  = $arr[3];
        $dlat = get_d_ll($lat);
        $dlon = get_d_ll($lon);
        $h{$icao} = [ $dlat, $dlon, $lat, $lon, $alt ];
    } else {
        pgm_exit(1,"ERROR: Did NOT split to 4... got [$len] [$equ]\n");
    }
    return \%h
}

#                   0     1            2          3
# [departure_id] = [LFPZ, N48* 48.95', E2* 3.83', +000371.00]
# [destination_id] = [EHLE, N52* 27.09', E5* 30.69', -000009.71]
sub add_ref_point($$$$) {
    my ($equ,$rpts,$type,$ricao) = @_;
    my @arr = split_cvs($equ);
    my $len = scalar @arr;
    #my %h = ();
    my ($icao,$lat,$lon,$alt,$dlat,$dlon);
    if ($len == 4) {
        $icao = $arr[0];
        $lat  = $arr[1];
        $lon  = $arr[2];
        $alt = $arr[3];
        $dlat = get_d_ll($lat);
        $dlon = get_d_ll($lon);
        ${$rpts}{$icao} = [ $dlat, $dlon, $lat, $lon, $alt, $type, -1 ];
        ${$ricao} = $icao# return ICAO
        return 1;
    }
    return 0;
}

sub add_way_point($$$) {
    my ($equ,$rpts,$ncnt) = @_;
    # [waypoint.1] = [LFMVM, V+LOCWAY, N49* 33.15', E2* 29.27', +000000.00, ]
    my @arr = split_cvs($equ);
    my $len = scalar @arr;
    #my %h = ();
    my ($icao,$lat,$lon,$alt,$dlat,$dlon,$type);
    if ($len == 5) {
        $icao = $arr[0];
        $type = $arr[1];
        $lat  = $arr[2];
        $lon  = $arr[3];
        $alt = $arr[4];
        $dlat = get_d_ll($lat);
        $dlon = get_d_ll($lon);
        if (defined ${$rpts}{$icao}) {
            my $rpti = ${$rpts}{$icao};
            # could CHECK the lat,lon...
            ${$rpti}[5] .= " $type";
        } else {
            ${$rpts}{$icao} = [ $dlat, $dlon, $lat, $lon, $alt, $type, $ncnt ];
        }
        return 1;
    }
    return 0;

}

sub mycmp_ascend {
   return -1 if (${$a}[0] < ${$b}[0]);
   return 1 if (${$a}[0] > ${$b}[0]);
   return 0;
}


sub show_ref_pts($) {
    my ($refpts) = @_;
    my ($icao,$rpti,$dlat,$dlon,$alt,$type,$ncnt,$ord,$dicao);
    my ($item,$dlatlon);
    my @arr = ();
    foreach $icao (keys %{$refpts}) {
        $rpti = ${$refpts}{$icao};
        #                    0      1      2     3     4      5      6
        #${$rpts}{$icao} = [ $dlat, $dlon, $lat, $lon, $alt,  $type, $ncnt ];
        $alt = ${$rpti}[4];
        $type = ${$rpti}[5];
        $ncnt = ${$rpti}[6];
        $ord = sprintf("%7d", $ncnt);
        push(@arr, [ $ncnt, $icao ]);
    }
    @arr = sort mycmp_ascend @arr;
    foreach $item (@arr) {
        $icao = ${$item}[1];    # (keys %{$refpts}) {
        next if ( ! defined ${$refpts}{$icao});
        $dicao = $icao;
        $dicao .= " " while (length($dicao) < 6);
        $rpti = ${$refpts}{$icao};
        #                    0      1      2     3     4      5      6
        #${$rpts}{$icao} = [ $dlat, $dlon, $lat, $lon, $freq, $type, $ncnt ];
        $dlat = ${$rpti}[0];
        $dlon = ${$rpti}[1];
        $dlatlon = sprintf("[%0.6f,%0.6f]", $dlat, $dlon);
        $alt = ${$rpti}[4];
        $type = ${$rpti}[5];
        $ncnt = ${$rpti}[6];
        $ord = sprintf("%7d", $ncnt);
        prt( "$ord: $dicao $dlatlon $alt $type\n" );
    }
}

# LFMVM  49.0525 2.1545
# -latlon=49.0525,2.1545
sub process_in_file($) {
    my ($inf) = @_;
    if (! open INF, "<$inf") {
        pgm_exit(1,"ERROR: Unable to open file [$inf]\n"); 
    }
    my @lines = <INF>;
    close INF;
    my $lncnt = scalar @lines;
    my ($in_name,$in_dir) = fileparse($inf);
    prt("Processing $lncnt lines, from [$in_name]...\n");
    my $rdps = get_data_points();
    my ($line,$inc,$lnn,$item,$equ,$ncnt,$icao);
    $lnn = 0;
    $inc = '';
    my %h = ();
    my $refpts = \%h;
    my ($rfrom,$rto,$ok,$rpti);
    $ok = 0;
    foreach $line (@lines) {
        chomp $line;
        $lnn++;
        if ($line =~ /\[(.+)\]\s*$/) {
            $inc = $1;
            prt("$lnn: Section: $inc\n");
        } elsif ($line =~ /(.+)\s*=\s*(.+)\s*$/) {
            $item = trim_all($1);
            $equ = trim_all($2);
            if (defined ${$rdps}{$item}) {
                # one of needed data points...
                if ($item =~ /departure_id/) {
                    # [departure_id] = [LFPZ, N48* 48.95', E2* 3.83', +000371.00]
                    $rfrom = get_ref_point($equ);
                    if (add_ref_point($equ,$refpts,"begin",\$icao)) {
                        if (defined ${$refpts}{$icao}) {
                            $rpti = ${$refpts}{$icao};
                            ${$rpti}[6] = -2;   # keep out of waypoint numbers, but not -1 (NOT SET)
                            $ok |= 1;
                        }
                    }
                } elsif ($item =~ /destination_id/) {
                    # [destination_id] = [EHLE, N52* 27.09', E5* 30.69', -000009.71]
                    $rto = get_ref_point($equ);
                    if (add_ref_point($equ,$refpts,"end",\$icao)) {
                        if (defined ${$refpts}{$icao}) {
                            $rpti = ${$refpts}{$icao};
                            ${$rpti}[6] = 9999999; # just the MAX in this array ;=))
                            $ok |= 2;
                        }
                    }
                }
            } elsif ($item =~ /^waypoint/) {
                # a way point
                if ($item =~ /^waypoint\.(\d+)$/) {
                    $ncnt = $1;
                    $ok |= 4 if (add_way_point($equ,$refpts,$ncnt));
                }
            } else {
                prt("[$item] = [$equ]\n");
            }
        }
    }
    show_ref_pts($refpts);
}

#########################################
### MAIN ###
parse_args(@ARGV);
# prt( "$pgmname: in [$cwd]: Hello, World...\n" );
process_in_file($in_file);
pgm_exit(0,"Normal exit(0)");
########################################
sub give_help {
    prt("$pgmname: version 0.0.1 2010-09-11\n");
    prt("Usage: $pgmname [options] in-file\n");
    prt("Options:\n");
    prt(" --help (-h or -?) = This help, and exit 0.\n");
}
sub need_arg {
    my ($arg,@av) = @_;
    pgm_exit(1,"ERROR: [$arg] must have following argument!\n") if (!@av);
}

sub deal_with_verbosity($) {
    my ($rav) = @_;
    my ($arg,$sarg,$i,$cnt);
    $cnt = scalar @{$rav};
    #prt("Doing verbosity check of $cnt args...\n");
    for ($i = 0; $i < $cnt; $i++) {
        $arg = ${$rav}[$i];
        #prt("Checking [$arg]...\n");
        if ($arg =~ /^-/) {
            $sarg = substr($arg,1);
            $sarg = substr($sarg,1) while ($sarg =~ /^-/);
            if ($sarg =~ /^v/) {
                #prt("Got -v... [$arg]\n");
                if ($sarg =~ /^v.*(\n+)$/) {
                    $verbosity = $1;
                } else {
                    while ($sarg =~ /^v/i) {
                        $verbosity++;
                        $sarg = substr($sarg,1)
                    }
                }
                prt( "[v1] Set verbosity to $verbosity\n") if (VERB1());
            }

        }
    }
}

sub parse_args {
    my (@av) = @_;
    my ($arg,$sarg);
    deal_with_verbosity(\@av);
    while (@av) {
        $arg = $av[0];
        if ($arg =~ /^-/) {
            $sarg = substr($arg,1);
            $sarg = substr($sarg,1) while ($sarg =~ /^-/);
            if (($sarg =~ /^h/i)||($sarg eq '?')) {
                give_help();
                pgm_exit(0,"Help exit(0)");
            } elsif ($sarg =~ /^v/) {
                # already done
            } else {
                pgm_exit(1,"ERROR: Invalid argument [$arg]! Try -?\n");
            }
        } else {
            $in_file = $arg;
            prt("Set input to [$in_file]\n");
        }
        shift @av;
    }

    if ((length($in_file) ==  0) && $debug_on) {
        $in_file = $def_file;
    }
    if (length($in_file) ==  0) {
        pgm_exit(1,"ERROR: No input files found in command!\n");
    }
    if (! -f $in_file) {
        pgm_exit(1,"ERROR: Unable to find in file [$in_file]! Check name, location...\n");
    }
}

# eof - template.pl

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