%# BEGIN BPS TAGGED BLOCK {{{
%#
%# COPYRIGHT:
%#
%# This software is Copyright (c) 1996-2025 Best Practical Solutions, LLC
%#                                          <sales@bestpractical.com>
%#
%# (Except where explicitly superseded by other copyright notices)
%#
%#
%# LICENSE:
%#
%# This work is made available to you under the terms of Version 2 of
%# the GNU General Public License. A copy of that license should have
%# been provided with this software, but in any event can be snarfed
%# from www.gnu.org.
%#
%# This work is distributed in the hope that it will be useful, but
%# WITHOUT ANY WARRANTY; without even the implied warranty of
%# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
%# General Public License for more details.
%#
%# You should have received a copy of the GNU General Public License
%# along with this program; if not, write to the Free Software
%# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
%# 02110-1301 or visit their web page on the internet at
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%# CONTRIBUTION SUBMISSION POLICY:
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%# (The following paragraph is not intended to limit the rights granted
%# to you to modify and distribute this software under the terms of
%# the GNU General Public License and is only of importance to you if
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%# END BPS TAGGED BLOCK }}}
<%INIT>
my $plain_text_mono
    = RT->Config->Get( 'PlainTextMono', $session{'CurrentUser'} );
my $Depth = 0;

my $object = $Transaction ? $Transaction->Object : undef;

my $print_content = sub {
    my $ref = shift;
    return unless defined $$ref && length $$ref;

    $m->callback( content => $ref, %ARGS );
    if ( $ContentType eq 'text/plain' ) {
        $m->comp( '/Elements/MakeClicky',
                  content => $ref,
                  object  => $object,
                  %ARGS
                );

        if ( defined $$ref && !$plain_text_mono ) {
            $$ref =~ s{(\r?\n)}{<br />}g;
        }
    } else {
        if ( defined $$ref ) {
            $$ref =~ s/^[\r\n]+//g;
        }
    }
    $m->out($$ref);
};

$m->out(   '<div class="message-stanza'
         . ( ($ContentType eq 'text/plain' &&  $plain_text_mono) ? ' plain-text-white-space' : '' ) . '"'
         . '>' );

if ( ref $Message ) {
    my @stack;
    my $para = '';
    my $i    = 0;

AGAIN: foreach ( ; $i < @$Message; $i++ ) {
        my $stanza = $Message->[$i];
        if ( ref $stanza eq "HASH" ) {
            # Fix message stanza nesting for Outlook's quoting styles
            if (     $stanza->{raw}
                 and not $stanza->{_outlooked}
                 and $stanza->{raw} =~ /^               # start of an internal line
                                        \s*             # optional whitespace
                                        (?:
                                            -{3,}       # at least three hyphens
                                            \s*         # whitespace varies between Outlook versions
                                                        # don't trigger on PGP signed message or signature blocks
                                            (?!(?:BEGIN|END)\s+PGP)
                                            \w          # at least one word character
                                            [\w\s]{3,}? # the rest of the word(s), totalling at least 5 characters,
                                                        #    loose to get different languages
                                            \w          # at least one ending word character
                                            \s*         # whitespace varies between Outlook versions
                                            -{3,}       # at least three hyphens again
                                          |
                                            _{6,}       # OR: six or more underscores
                                        )
                                        \s*$            # optional whitespace until the end of the line
                                       /xm )
            {
                # There's content before the quoted message, but in the
                # same stanza.  Break it out!
                if ( my $start = $-[0] ) {
                    my %preceding = %$stanza;

                    # We don't process $stanza->{text} because we don't use it
                    # and it isn't given to us by HTML::Quoted.  If we ever
                    # need to, we can process it the same way as 'raw'.
                    $preceding{raw} = substr($stanza->{raw}, 0, $start, '');

                    # If it's wrapped in <pre>(ckeditor does it) or <div>(some email clients do it), we need to
                    # complement for the split ones. Here we close <pre>/<div> for the former part. Opening a new
                    # <pre>/<div> for the latter part is in the else block.

                    if ( $preceding{raw} =~ /^<(pre|div)>/i ) {
                        $preceding{raw} .= "</$1>";
                    }

                    # Replace the current stanza with the two we just created
                    splice @$Message, $i, 1, \%preceding, $stanza;

                    # Try it again from the top now that we've rejiggered our
                    # stanzas.  We'll process the Outlook stanza again, and hit
                    # the else below this time.
                    redo;
                } else {
                    # Nest the current stanza and everything that follows
                    $stanza->{_outlooked}++;

                    # Complement the <pre>/<div> for the latter part, see also the if block above.
                    $stanza->{raw} = "<$1>" . $stanza->{raw} if $stanza->{raw} =~ m{</(pre|div)>$}i;
                    $stanza = $Message->[ $i ] = [ splice @$Message, $i ];

                    # Wrap the latter part with a new blockquote if the original stanza has it. Note
                    # that </blockquote> in "close_raw" is to close the one in the upper level(original stanza).
                    if ( ref $Message->[0] eq 'HASH' && $Message->[0]{raw} eq '<blockquote>' ) {
                        unshift @$stanza, { %{ $Message->[0] }, close_raw => '</blockquote>' };
                    }
                }
            }
            else {
                $para .= ( defined $stanza->{raw} ? $stanza->{raw} : '' )."\n";
            }
        }
        next unless ref $stanza eq "ARRAY";

        $print_content->( \$para );
        $para = '';

        $Depth++;
        push @stack, [ $Message, $i + 1 ];
        ( $Message, $i ) = ( $stanza, -1 );

        if ( $Depth == 1 ) {
            $m->comp('FoldStanzaJS');
        }
        my @classes = ('message-stanza');
        push @classes, $Depth == 1 ? 'closed' : 'open';
        $m->out(   '<div class="' . join(" ", @classes) . '">' );
    }
    if ( length $para ) {
        $print_content->( \$para );
        $para = '';
    }

    if (@stack) {
        $m->out('</div>');
        $m->out( $Message->[0]{close_raw} ) if ref $Message->[0] eq 'HASH' && $Message->[0]{close_raw};
        ( $Message, $i ) = @{ pop @stack };
        $Depth--;
        goto AGAIN;
    }
} else {
    $print_content->( \$Message );
}

$m->out('<hr class="clear">');
$m->out('</div>');
</%INIT>
<%ARGS>
$Message => undef
$Transaction => undef
$ContentType => 'text/plain'
</%ARGS>
