From ee43823179ee627ac16ea9da8168e5f1bf9619c0 Mon Sep 17 00:00:00 2001
From: "Jannis M. Hoffmann" <jannis.hoffmann@rwth-aachen.de>
Date: Thu, 29 Oct 2020 12:13:04 +0100
Subject: Initial commit; Stable version

---
 lib/JWebmail/Controller/Webmail.pm | 386 +++++++++++++++++++++++++++++++++++++
 1 file changed, 386 insertions(+)
 create mode 100644 lib/JWebmail/Controller/Webmail.pm

(limited to 'lib/JWebmail/Controller')

diff --git a/lib/JWebmail/Controller/Webmail.pm b/lib/JWebmail/Controller/Webmail.pm
new file mode 100644
index 0000000..3ec93f1
--- /dev/null
+++ b/lib/JWebmail/Controller/Webmail.pm
@@ -0,0 +1,386 @@
+package JWebmail::Controller::Webmail;
+
+use Mojo::Base 'Mojolicious::Controller';
+
+use File::Type;
+
+use constant {
+    S_USER => 'user', # Key for user name in active session
+};
+
+
+# no action has been taken, display login page
+sub noaction {
+    my $self = shift;
+
+    my $user = $self->session(S_USER);
+    if ($user) {
+        $self->res->code(307);
+        $self->redirect_to('home');
+    }
+}
+
+
+# middleware
+sub auth {
+    my $self = shift;
+
+    my $user = $self->session(S_USER);
+    my $pw = $self->session_passwd;
+
+    unless ($user && $pw) {
+        $self->flash(message => $self->l('no_session'));
+        $self->res->code(401);
+        $self->redirect_to('logout');
+        return 0;
+    }
+
+    return 1;
+}
+
+
+sub _time :prototype(&$$) {
+    my $code = shift;
+    my $self = shift;
+    my $name = shift;
+
+    $self->timing->begin($name);
+
+    my @res = $code->();
+
+    my $elapsed = $self->timing->elapsed($name);
+    $self->app->log->debug("$name took $elapsed seconds");
+
+    return wantarray ? @res : $res[-1];
+}
+
+
+sub login {
+    my $self = shift;
+
+    my $v = $self->validation;
+    
+    my $user = $v->required('userid')->size(4, 50)->param;
+    my $passwd = $v->required('password')->size(4, 50)->like(qr/^.+$/)->param; # no new-lines
+
+    if ($v->has_error) {
+        $self->res->code(400);
+        return $self->render(action => 'noaction');
+    }
+
+    my $valid = _time { $self->users->verify_user($user, $passwd) } $self, 'verify user';
+
+    if ($valid) {
+        $self->session(S_USER() => $user);
+        $self->session_passwd($passwd);
+
+        $self->res->code(303);
+        $self->redirect_to('displayheaders');
+    }
+    else {
+        $self->res->code(401);
+        $self->render(action => 'noaction',
+            warning => $self->l('login') . ' ' . $self->l('failed') . '!',
+        );
+    }
+}
+
+
+sub logout {
+    my $self = shift;
+
+    delete $self->session->{S_USER()};
+    $self->session_passwd('');
+
+    # $self->session(expires => 1);
+
+    $self->res->code(303);
+    $self->redirect_to('noaction');
+}
+
+
+sub about {
+    my $self = shift;
+
+    $self->stash(
+        scriptadmin => $self->config->{defaults}{scriptadmin},
+        http_host   => $self->tx->req->url->to_abs->host,
+        request_uri => $self->tx->req->url,
+        remote_addr => $self->tx->original_remote_address,
+    );
+}
+
+
+sub displayheaders {
+    no warnings 'experimental::smartmatch';
+    my $self = shift;
+
+    my $auth = AuthReadMails->new(
+        user      => $self->session(S_USER),
+        password  => $self->session_passwd,
+        challenge => $self->app->secrets->[0],
+    );
+
+    my $folders = _time { $self->users->folders($auth) } $self, 'user folders';
+    push @$folders, '';
+
+    unless ( $self->stash('folder') ~~ $folders ) {
+        $self->res->code(404);
+        $self->render(template => 'error',
+            error => $self->l('no_folder'),
+            links => [map { $self->url_for(folder => $_) } @$folders],
+        );
+        return;
+    }
+
+    my $v = $self->validation;
+    my $sort = $v->optional('sort')->like(qr'^!?(?:date|subject|sender|size)$')->param // '!date';
+    my $search = $v->optional('search')->param;
+
+    if ($v->has_error) {
+        $self->res->code(400);
+        $self->render(template => 'error', error => "errors in @{ $v->failed }");
+        return;
+    }
+
+    my ($total_byte_size, $cnt, $new) = _time { $self->users->count($auth, $self->stash('folder')) } $self, 'user count';
+
+    my ($start, $end) = $self->paginate($cnt);
+
+    $self->timing->begin('user_headers');
+    my $headers;
+    if ($search) {
+        $headers = $self->users->search(
+            $auth, $search, $self->stash('folder'),
+        );
+    }
+    else {
+        $headers = $self->users->read_headers_for(
+            auth   => $auth,
+            folder => $self->stash('folder'),
+            start  => $start,
+            end    => $end,
+            sort   => $sort,
+        );
+    }
+    my $elapsed = $self->timing->elapsed('user_headers');
+    $self->app->log->debug("Reading user headers took $elapsed seconds");
+
+    $self->stash(
+        msgs         => $headers,
+        mail_folders => $folders,
+        total_size   => $total_byte_size,
+        total_new_mails => $new,
+    );
+}
+
+
+sub readmail {
+    my $self = shift;
+
+    my $mid = $self->stash('id');
+
+    my $auth = AuthReadMails->new(
+        user      => $self->session(S_USER),
+        password  => $self->session_passwd,
+        challenge => $self->app->secrets->[0],
+    );
+
+    my $mail;
+    eval { $mail = $self->users->show($auth, $mid) };
+    if (my $err = $@) {
+        if ($err =~ m/unkown mail-id|no such message/) {
+            $self->reply->not_found;
+            return;
+        }
+        die $@;
+    }
+
+    $self->render(action => 'readmail',
+        msg => $mail,
+    );
+}
+
+
+sub writemail { }
+
+
+sub sendmail {
+    my $self = shift;
+
+    my %mail;
+    my $v = $self->validation;
+    $v->csrf_protect;
+
+    $mail{to}          = $v->required('to', 'not_empty')->check('mail_line')->every_param;
+    $mail{message}     = $v->required('body', 'not_empty')->param;
+    $mail{subject}     = $v->required('subject', 'not_empty')->param;
+    $mail{cc}          = $v->optional('cc', 'not_empty')->check('mail_line')->every_param;
+    $mail{bcc}         = $v->optional('bcc', 'not_empty')->check('mail_line')->every_param;
+    $mail{reply}       = $v->optional('back_to', 'not_empty')->check('mail_line')->param;
+    $mail{attach}      = $v->optional('attach', 'non_empty_ul')->upload->param;
+    $mail{attach_type} = File::Type->new()->mime_type($mail{attach}->asset->get_chunk(0, 512)) if $mail{attach};
+    $mail{from}        = $self->session(S_USER);
+
+    if ($v->has_error) {
+        $self->log->debug("mail send failed. Error in @{ $v->failed }");
+
+        $self->render(action => 'writemail',
+            warning => $self->l('error_send'),
+        );
+        return;
+    }
+
+    my $error = $self->send_mail(\%mail);
+
+    if ($error) {
+        $v->error('send'=> ['internal_error']); # make validation fail so that values are restored
+
+        $self->render(action => 'writemail',
+            warning => $self->l('error_send'),
+        );
+        return;
+    }
+
+    $self->flash(message => $self->l('succ_send'));
+    $self->res->code(303);
+    $self->redirect_to('displayheaders');
+}
+
+
+sub move {
+    my $self = shift;
+
+    my $v = $self->validation;
+    $v->csrf_protect;
+
+    if ($v->has_error) {
+        return;
+    }
+
+    my $auth = AuthReadMails->new(
+        user      => $self->session(S_USER),
+        password  => $self->session_passwd,
+        challenge => $self->app->secrets->[0],
+    );
+    my $folders = $self->users->folders($auth);
+
+    my $mm = $self->every_param('mail');
+    my $folder = $self->param('folder');
+
+    no warnings 'experimental::smartmatch';
+    die "$folder not valid" unless $folder ~~ $folders;
+
+    $self->users->move($auth, $_, $folder) for @$mm;
+
+    $self->flash(message => $self->l('succ_move'));
+    $self->res->code(303);
+    $self->redirect_to('displayheaders');
+}
+
+
+sub raw {
+    my $self = shift;
+
+    my $mid = $self->stash('id');
+
+    my $auth = AuthReadMails->new(
+        user      => $self->session(S_USER),
+        password  => $self->session_passwd,
+        challenge => $self->app->secrets->[0],
+    );
+
+    my $mail = $self->users->show($auth, $mid);
+
+    if ($self->param('body')//'' eq 'html') {
+        if ($mail->{content_type} eq 'text/html') {
+            $self->render(text => $mail->{body}) ;
+        }
+        elsif ($mail->{content_type} eq 'multipart/alternative') {
+            my ($content) = grep {$_->{type} eq 'text/html'} @{ $mail->{body} };
+            $self->render(text => $content->{val});
+        }
+        else {
+            $self->res->code(404);
+        }
+    }
+    else {
+        $self->res->headers->content_type('text/plain');
+        $self->render(text => $self->dumper($mail));
+    }
+}
+
+
+1
+
+__END__
+
+=encoding utf-8
+
+=head1 NAME 
+
+Webmail - All functions comprising the webmail application.
+
+=head1 SYNOPSIS
+
+  my $r = $app->routes;
+  $r->get('/about')->to('Webmail#about');
+  $r->post('/login')->to('Webmail#login');
+
+=head1 DESCRIPTION
+
+The controller of JWebmail.
+
+=head1 METHODS
+
+=head2 noaction
+
+The login page. This should be the root.
+
+=head2 auth
+
+  my $a = $r->under('/')->to('Webmail#auth');
+
+  An intermediate route that makes sure a user has a valid session.
+
+=head2 login
+
+Post route that checks login data.
+
+=head2 logout
+
+Route that clears session data.
+
+=head2 about
+
+Public route.
+
+=head2 displayheaders
+
+Provides an overview over messages.
+
+=head2 readmail
+
+Displays a single mail.
+
+=head2 writemail
+
+A mail editor.
+
+=head2 sendmail
+
+Sends a mail written in writemail.
+
+=head2 move
+
+Moves mails between mail forlders.
+
+=head2 raw
+
+Displays the mail raw, ready to be downloaded.
+
+=head1 DEPENCIES
+
+Mojolicious and File::Type
+
+=cut
\ No newline at end of file
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