#!/usr/bin/perl
# -*- Mode: perl -*-
# file: feedback
# Provide feedback to data curator(s)

use strict;

use CGI 2.42 qw(:standard);
use Ace::Browser::AceSubs qw(:DEFAULT Header DB_Name);
use vars '@FEEDBACK_RECIPIENTS';

# This page called with the parameters:
#      recipients- numeric index(es) for recipients of message
#      name    - name of object to update
#      class   - class of object to update
#      from    - sender's e-mail address
#      subject - subject of mail message
#      remark  - body of e-mail message

my $object_name  = param('name');
my $object_class = param('class');
my $where_from   = param('referer') || referer();

if (param('return') && $where_from !~ /\/feedback/ ) {
    print redirect($where_from);
    exit 0;
}

PrintTop(undef,undef,'Feedback Page');

if (Configuration->Feedback_recipients) {
  @FEEDBACK_RECIPIENTS = @{Configuration->Feedback_recipients};

  if (param('submit') && send_mail($object_name,$object_class,$where_from)) {
    print_confirmation();
  } else {
    print start_form;
    print_instructions();
    print_form( $object_name,$object_class,DB_Name(),$where_from );
    print end_form;
  }
} else {
  print p("No recipients for feedback are defined.");
  print start_form(),
	    hidden(-name=>'referer',-value=>$where_from),br,
            submit(-name=>'return',-value=>'Cancel & Return',-class=>'error'),
	      end_form();
}
PrintBottom;


sub print_top {
    my $title = 'Data Submissions and Comments';
    print start_html (
		      '-Title'   => $title,
		      '-style'   => Style(),
		    ),
	Header,
	h1($title);
}

sub print_instructions {
  my @defaults;
  for (my $i=0; $i<@FEEDBACK_RECIPIENTS; $i++) {
    push @defaults,$i if $FEEDBACK_RECIPIENTS[$i][2];
  }
  print
    p({-class=>'small'},
      "Use this form to send new data or corrections to",
      "the maintainers of this database.  An e-mail message",
      "will be sent to the individuals selected from the list",
      "below."),
	blockquote({-class=>'small'},
		   checkbox_group(-name    => 'recipients',
				  -Values  => [(0..$#FEEDBACK_RECIPIENTS)],
				  -Labels  => { map {
				    $_=>"$FEEDBACK_RECIPIENTS[$_]->[0] ($FEEDBACK_RECIPIENTS[$_]->[1])"
				  } (0..$#FEEDBACK_RECIPIENTS) },
				  -defaults=>\@defaults,
				  -linebreak=>1));
}

sub print_bottom {
    print Footer;
}

sub print_form {
    my ($name,$class,$db,$where_from) = @_;
    print
	table(
	      TR(th({-align=>'RIGHT'},"Your full name:"),
		 td({-align=>'LEFT'},textfield(-name=>'full_name',-size=>40))),
	      
	      TR(th({-align=>'RIGHT'},"Your institution:"),
		 td({-align=>'LEFT'},textfield(-name=>'institution',-size=>40))),

	      TR(th({-align=>'RIGHT'},"Your e-mail address:"),
		 td({-align=>'LEFT'},textfield(-name=>'from',-size=>40))),

	      TR(th({-align=>'RIGHT'},"Subject:"),
		 td({-align=>'LEFT'},textfield(-name=>'subject',
					       -value=>$class && $name ?
					       "Comments on $class $name ($db db)": '',
					       -size=>60))),

	      TR(th({-colspan=>2,-align=>'LEFT'},'Comment or Correction:')),

	      TR(td({-colspan=>2},textarea(-name=>'remark',
					   -rows=>12,
					   -cols=>80,
					   -wrap=>'VIRTUAL'
					   ))),
	      ),
            hidden(-name=>'name',-value=>$name),
	    hidden(-name=>'class',-value=>$class),
	    hidden(-name=>'db',-value=>$db),
	    hidden(-name=>'referer',-value=>$where_from),br,
            submit(-name=>'return',-value=>'Cancel & Return',-class=>'error'),
            submit(-name=>'submit',-value=>'Submit Data');
}

sub send_mail {
    my ($obj_name,$obj_class,$where_from) = @_;
    $obj_name   ||= '(unknown name)';
    $obj_class  ||= '(unknown class)';
    $where_from ||= '(unknown)';

    my @addresses = map { $FEEDBACK_RECIPIENTS[$_] ? 
			      $FEEDBACK_RECIPIENTS[$_]->[0]
				  : () } param('recipients');
    my @missing;
    push @missing,"At least one message recipient"
	unless  @addresses;
    push @missing,"Your full name (needed for proper attribution)"
	unless my $name = param('full_name');
    push @missing,"Your institution (needed for proper attribution)"
	unless my $institution = param('institution');
    push @missing,"Your e-mail address"     
	unless my $from = param('from');
    push @missing,"A properly formatted e-mail address"
	if $from && $from !~ /.+\@[\w.]+/;
    push @missing,"A subject line"          
	unless my $subject = param('subject');
    push @missing,"A comment or correction" 
	unless my $remark = param('remark');
    if (@missing) {
	print
	    p({-class=>'error'},
	      "Your submission could not be processed because",
	      "the following information was missing:"),
	    ol({-class=>'error'},
	       li(\@missing)),
	    p({-class=>'error'},
	      "Please fill in the missing fields and try again.");
	return;
    }


    my $error = <<END;
Unable to send mail.  Please try again later.  
If the problem persists, contact the site\'s webmaster.
END
    ;
    unless (open (MAIL,"|/usr/lib/sendmail -oi -t")) {
	AceError($error);
	return;
    }
    my $to = join(", ",@addresses);
    print MAIL <<END;
From: $from ($name via ACEDB feedback page)
To: $to
Subject: $subject

Full name:   $name
Institution: $institution
Address:     $from

DATABASE RECORD: $obj_class: $obj_name

SUBMITTED FROM PAGE: $where_from

COMMENT TEXT:
$remark
END
    ;
    
    unless (close MAIL) {
	AceError($error);
	return;
    }
    return 1;
}

sub print_confirmation {
    print 
	p("Thank you for taking the time to submit this information.",
	  "Please use the buttons below to submit more reports or to",
	  "return to the database.",
	  ),
	start_form,
	submit(-name=>'restart',-label=>'Submit Another Report'),
	hidden('referer'),
	submit(-name=>'return',-label=>'Return to Database'),
	end_form;
}