#!/usr/bin/perl

use LAM::LAM qw(displayPage displaySource viewFormData);
use CGI qw(:all escape unescape);
use strict;     # Force me to use strict variable syntax.
use warnings;  # Enable all warnings.

LAM::displaySource(                   # Display source, rlog, etc. if requested.
"https://gitlab.com/aws-lam/no-ssl/-/blob/master/html/Public/Scripts/Escape.cgi-pl");

if (param('Submit')) { my $submitRequest = param('Submit');
	if ($submitRequest eq 'Show Escape') {showEscape()}
	elsif ($submitRequest eq 'Show UnEscape') {showUnEscape()}
	elsif ($submitRequest eq 'View Form Data') {LAM::viewFormData()}
} else { # Display the Show Escape Form by default.
	my $formData = start_form(). 'Text String:'. br(). "\n".
	    textarea(-name=>'Text String', -rows=>10, -cols=>80, -wrap=>'soft',
	    -value=>"{select|describe|show} {argument(s)}"). "\n". br().
	    'Plus sign:'. "\n". radio_group({-name=>'Plus sign',
		-values=>['Regular','Special'],-default=>'Regular'}). "\n".
		div({-align=>'center'},
	    submit(-name=>'Submit',-value=>'Show Escape'), "\n",
	    submit(-name=>'Submit',-value=>'Show UnEscape'), "\n",
	    reset(),
	    submit(-name=>'Submit',-value=>'View Form Data'), br(), "\n");
	LAM::displayPage('-c', center('Show Escape.'), $formData)}
# ..:....|....:....|....:....|....:....|....:....|....:....|....:....|....:....|
sub showEscape { my $bodyText = '';	my $tempEscaped = '';
my $textString = param('Text String') || '';
my $textStringEscaped = escape($textString); # use CGI::escape()

if (param('Plus sign')) {my $plusSign = param('Plus sign');
	if ($plusSign eq 'Special') {$textStringEscaped =~ s/%20/+/g}}

if (length($textStringEscaped) > 72) { # prevent a really wide page
    $tempEscaped = "<pre>\n";
    my $tempString = $textStringEscaped;
    my $length = length($tempString); my $offset = 0;
    while ($offset < $length) {
        $tempEscaped .= substr($tempString, $offset, 72). " :\n";
        $offset = $offset + 72
    } $tempEscaped .= "\n</pre>\n"
} else {$tempEscaped = $textStringEscaped}
my $textStringUnEscaped = unescape($textStringEscaped);
$bodyText .=  "\nText String:\n". p(). "\n$textString\n". p(). "\n".
    "\nEscaped Text String:\n". p(). b("\n$tempEscaped\n"). p(). "\n".
    "\nUnEscaped Text String:\n". p(). "\n$textStringUnEscaped\n". p(). "\n";
if ($textString ne $textStringUnEscaped) {LAM::displayPage('-e', '-c',
    'The value has changed.', h2("\nThe values\n") . $bodyText)}
    	# Darn! These should match!
else {LAM::displayPage('-c', center('Show Escape.'),
    h2("\nThe specified Text String with special characters escaped.\n").
    $bodyText,)}}
# ..:....|....:....|....:....|....:....|....:....|....:....|....:....|....:....|
sub showUnEscape { my $bodyText = '';	my $textStringUnEscaped = '';
my $textString = param('Text String') || '';
$textStringUnEscaped = unescape($textString); # use CGI::unescape()
my $textStringEscaped = escape($textStringUnEscaped);

if (param('Plus sign')) {my $plusSign = param('Plus sign');
	if ($plusSign eq 'Special') {$textStringEscaped =~ s/%20/+/g}}

$bodyText .=  "\nText String:\n". p(). "\n$textString\n". p(). "\n".
    "\nUnEscaped Text String:\n". p(). "\n$textStringUnEscaped\n". p(). "\n".
    "\nEscaped Text String:\n". p(). b("\n$textStringEscaped\n"). p(). "\n";
if ($textString ne $textStringEscaped) {LAM::displayPage('-e', '-c',
    'The value has changed.', h2("\nThe values\n") . $bodyText)}
    	# Darn! These should match!
else {LAM::displayPage('-c', center('Show UnEscape.'),
    h2("\nThe specified Text String with special characters UnEscaped.\n").
    $bodyText,)}}
# ..:....|....:....|....:....|....:....|....:....|....:....|....:....|....:....|