+ LDV::Comments

lib/LDV/Comments.pm

@@ -0,0 +1,112 @@
+package LDV::Comments;
+
+use strict;
+use warnings;
+use utf8;
+
+use Mojo::Base 'Mojolicious::Controller';
+
+use Mojo::URL;
+
+sub _gen_id {
+  my ($self) = @_;
+  my $url = $self->req->param('pageid') ||
+            $self->req->headers->referrer;
+  my $maxlen = 64;
+
+  return unless $url;
+  my $id = Mojo::URL->new($url)->path;
+
+  $id =~ s{^/+}{}o;
+  $id =~ s{/+$}{}o;
+  $id =~ y{/.}{-}s;
+  $id =~ s<\.[a-z0-9]{2,4}$><>io;
+  $id = substr($id, -$maxlen, $maxlen);
+  $self->app->log->debug("comments id: $id -- $url");
+
+  return $id;
+}
+
+sub _comments_load {
+  my ($self) = @_;
+
+  my $id = $self->_gen_id
+    or die("can't get id\n");
+  my $path = $self->app->home->rel_file("data/comments/$id.json");
+  return [] unless -f $path;
+
+  open my $FH, '<', $path
+    or die("open (r): $path -- $!\n");
+  local $/ = undef;
+  my $data = <$FH>;
+  close $FH;
+
+  return $self->app->json->decode($data);
+}
+
+sub _comments_save {
+  my ($self, $data) = @_;
+
+  my $id = $self->_gen_id
+    or die("can't get id\n");
+  my $path = $self->app->home->rel_file("data/comments/$id.json");
+
+  open my $FH, '>', $path
+    or die("open (w): $path -- $!\n");
+  print $FH $self->app->json->encode($data);
+  close $FH;
+
+  return 1;
+}
+
+sub add {
+  my ($self) = @_;
+
+  eval {
+    my $text = $self->req->param('text')
+      or die("empty comment\n");
+    my $comments = $self->_comments_load();
+    my $comment = {
+      text => $text, time => time(),
+      user => $self->session('username') || 'anonymous',
+    };
+    push @{ $comments }, $comment;
+    $self->_comments_save($comments);
+    $self->render(text => 'OK');
+  } or do {
+    chomp $@;
+    $self->app->log->error($@);
+    $@ = 'internal error' if $@ =~ m{line \d+}o;
+    $self->res->code(400);
+    $self->render(text => $@);
+  };
+
+  $self->rendered();
+}
+
+sub get {
+  my ($self) = @_;
+
+  eval {
+    my $comments = $self->_comments_load();
+    die("can't load comments\n")
+      unless ref($comments) eq 'ARRAY';
+    if (my $count = scalar @{ $comments }) {
+      $self->app->log->debug("loaded $count comments");
+      $self->stash({comments => $comments});
+      $self->render(template => 'comments/list');
+    } else {
+      $self->render(template => 'comments/none');
+    };
+  } or do {
+    chomp $@;
+    $self->app->log->error($@);
+    $@ = 'internal error' if $@ =~ m{line \d+}o;
+    $self->res->code(400);
+    $self->render(text => $@);
+  };
+
+  $self->rendered();
+}
+
+1;