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package Statocles::App::Blog;
# ABSTRACT: A blog application
use Statocles::Base 'Class';
use Getopt::Long qw( GetOptionsFromArray );
use Statocles::Store::File;
use Statocles::Page::Document;
use Statocles::Page::List;
with 'Statocles::App';
=attr store
The L<store|Statocles::Store> to read for documents.
=cut
has store => (
is => 'ro',
isa => Store,
coerce => Store->coercion,
required => 1,
);
=attr tag_text
A hash of tag and descriptions to introduce tags. Having a description is optional.
=cut
has tag_text => (
is => 'ro',
isa => HashRef,
default => sub { {} },
);
=attr page_size
The number of posts to put in a page (the main page and the tag pages). Defaults
to 5.
=cut
has page_size => (
is => 'ro',
isa => Int,
default => sub { 5 },
);
=attr index_tags
Filter the tags shown in the index page. An array of tags prefixed with either
a + or a -. By prefixing the tag with a "-", it will be removed from the index,
unless a later tag prefixed with a "+" also matches.
By default, all tags are shown on the index page.
So, given a document with tags "foo", and "bar":
index_tags => [ ]; # document will be included
index_tags => [ '-foo' ]; # document will not be included
index_tags => [ '-foo', '+bar' ]; # document will be included
=cut
has index_tags => (
is => 'ro',
isa => ArrayRef[Str],
default => sub { [] },
);
# A cache of the last set of post pages we have
# XXX: We need to allow apps to have a "clear" the way that Store and Theme do
has _post_pages => (
is => 'rw',
isa => ArrayRef,
default => sub { [] },
);
=method command
my $exitval = $app->command( $app_name, @args );
Run a command on this app. The app name is used to build the help, so
users get exactly what they need to run.
=cut
our $default_post = {
tags => undef,
content => <<'ENDCONTENT',
Markdown content goes here.
ENDCONTENT
};
my $USAGE_INFO = <<'ENDHELP';
Usage:
$name help -- This help file
$name post [--date YYYY-MM-DD] <title> -- Create a new blog post with the given title
ENDHELP
sub command {
my ( $self, $name, @argv ) = @_;
if ( !$argv[0] ) {
say STDERR "ERROR: Missing command";
say STDERR eval "qq{$USAGE_INFO}";
return 1;
}
if ( $argv[0] eq 'help' ) {
say eval "qq{$USAGE_INFO}";
}
elsif ( $argv[0] eq 'post' ) {
my %opt;
GetOptionsFromArray( \@argv, \%opt,
'date:s',
);
my %doc = (
%$default_post,
title => join " ", @argv[1..$#argv],
);
# Read post content on STDIN
if ( !-t *STDIN ) {
my $content = do { local $/; <STDIN> };
%doc = (
%doc,
$self->store->parse_frontmatter( "<STDIN>", $content ),
);
# Re-open STDIN as the TTY so that the editor (vim) can use it
# XXX Is this also a problem on Windows?
if ( -e '/dev/tty' ) {
close STDIN;
open STDIN, '/dev/tty';
}
}
if ( !$ENV{EDITOR} && !$doc{title} ) {
say STDERR <<"ENDHELP";
Title is required when \$EDITOR is not set.
Usage: $name post <title>
ENDHELP
return 1;
}
my ( $year, $mon, $day );
if ( $opt{ date } ) {
( $year, $mon, $day ) = split /-/, $opt{date};
}
else {
( undef, undef, undef, $day, $mon, $year ) = localtime;
$year += 1900;
$mon += 1;
}
my @date_parts = (
sprintf( '%04i', $year ),
sprintf( '%02i', $mon ),
sprintf( '%02i', $day ),
);
if ( $ENV{EDITOR} ) {
# I can see no good way to test this automatically
my $slug = $self->make_slug( $doc{title} || "new post" );
my $path = Path::Tiny->new( @date_parts, $slug, "index.markdown" );
my $tmp_path = $self->store->write_document( $path => \%doc );
system $ENV{EDITOR}, $tmp_path;
%doc = %{ $self->store->read_document( $path ) };
$self->store->path->child( $path )->remove;
}
my $slug = $self->make_slug( $doc{title} );
my $path = Path::Tiny->new( @date_parts, $slug, "index.markdown" );
my $full_path = $self->store->write_document( $path => \%doc );
say "New post at: $full_path";
}
else {
say STDERR qq{ERROR: Unknown command "$argv[0]"};
say STDERR eval "qq{$USAGE_INFO}";
return 1;
}
return 0;
}
=method make_slug
my $slug = $app->make_slug( $title );
Given a post title, remove special characters to create a slug.
=cut
sub make_slug {
my ( $self, $slug ) = @_;
$slug =~ s/[\W]+/-/g;
return lc $slug;
}
=method post_pages
my @pages = $app->post_pages;
Get the individual post L<Statocles::Page> objects.
=cut
sub post_pages {
my ( $self ) = @_;
my @pages = map { $self->_make_post_page( $_ ) } $self->_sorted_docs;
$self->_post_pages( [ @pages ] );
return @pages;
}
=method post_files
my @pages = $app->post_files;
Get all the post collateral files as L<Statocles::Page> objects. Markdown
files will be created as L<Statocles::Page::Document> objects, any other files
will be L<Statocles::Page::File> objects.
=cut
sub post_files {
my ( $self ) = @_;
my @pages;
my @paths;
my $iter = $self->store->find_files( include_documents => 1 );
while ( my $path = $iter->() ) {
push @paths, $path;
}
for my $path ( @paths ) {
# Files must be in folders
next unless $path =~ m{^/(\d{4})/(\d{2})/(\d{2})/[^/]+/};
# index.markdown is the post itself
next if $path =~ m{/index[.]markdown$};
next if $path =~ m{/index[.]html$};
if ( $self->store->is_document( $path ) ) {
my $page_path = $path;
$page_path =~ s{[.]\w+$}{.html};
my %args = (
path => $page_path,
app => $self,
layout => $self->site->theme->template( site => 'layout.html' ),
document => $self->store->read_document( $path ),
);
push @pages, Statocles::Page::Document->new( %args );
}
else {
# If there's a markdown file, don't keep the html file
if ( $path =~ /[.]html$/ ) {
my $doc_path = "$path";
$doc_path =~ s/[.]html$/.markdown/;
next if grep { $_ eq $doc_path } @paths;
}
push @pages, Statocles::Page::File->new(
path => $path,
file_path => $self->store->path->child( $path ),
);
}
}
return @pages;
}
# Return the post docs sorted by date, pruning any docs that are after
# the current date
sub _sorted_docs {
my ( $self ) = @_;
my $today = Time::Piece->new->ymd;
my @doc_dates;
for my $doc ( @{ $self->store->documents } ) {
my @date_parts = $doc->path =~ m{/(\d{4})/(\d{2})/(\d{2})/[^/]+(?:/index[.]markdown)?$};
next unless @date_parts;
my $date = join "-", @date_parts;
next if $date gt $today;
push @doc_dates, [ $doc, $date ];
}
return map { $_->[0] } sort { $b->[1] cmp $a->[1] } @doc_dates;
}
sub _make_post_page {
my ( $self, $doc ) = @_;
my $path = $doc->path;
$path =~ s{/{2,}}{/}g;
$path =~ s{[.]\w+$}{.html};
my @date_parts = $doc->path =~ m{/(\d{4})/(\d{2})/(\d{2})/[^/]+(?:/index[.]markdown)?$};
my $date = join "-", @date_parts;
my @tags;
for my $tag ( @{ $doc->tags } ) {
push @tags, $self->link(
text => $tag,
href => join( "/", 'tag', $self->_tag_url( $tag ), '' ),
);
}
return Statocles::Page::Document->new(
app => $self,
layout => $self->site->theme->template( site => 'layout.html' ),
template => $self->site->theme->template( blog => 'post.html' ),
document => $doc,
path => $path,
date => $doc->has_date ? $doc->date : Time::Piece->strptime( $date, '%Y-%m-%d' ),
tags => \@tags,
);
}
=method index
my @pages = $app->index( @post_pages );
Build the index page (a L<list page|Statocles::Page::List>) and all related feed pages
out of the given post pages (built from L<the post_pages method|/post_pages>).
=cut
my %FEEDS = (
rss => {
text => 'RSS',
template => 'index.rss',
},
atom => {
text => 'Atom',
template => 'index.atom',
},
);
sub index {
my ( $self, @all_post_pages ) = @_;
# Filter the index_tags
my @index_post_pages;
PAGE: for my $page ( @all_post_pages ) {
my $add = 1;
for my $tag_spec ( @{ $self->index_tags } ) {
my $flag = substr $tag_spec, 0, 1;
my $tag = substr $tag_spec, 1;
if ( grep { $_ eq $tag } @{ $page->document->tags } ) {
$add = $flag eq '-' ? 0 : 1;
}
}
push @index_post_pages, $page if $add;
}
my @pages = Statocles::Page::List->paginate(
after => $self->page_size,
path => '/page/%i/index.html',
index => '/index.html',
# Sorting by path just happens to also sort by date
pages => [ sort { $b->path cmp $a->path } @index_post_pages ],
app => $self,
template => $self->site->theme->template( blog => 'index.html' ),
layout => $self->site->theme->template( site => 'layout.html' ),
);
return unless @pages; # Only build feeds if we have pages
my $index = $pages[0];
my @feed_pages;
my @feed_links;
for my $feed ( sort keys %FEEDS ) {
my $page = Statocles::Page::List->new(
app => $self,
pages => $index->pages,
path => 'index.' . $feed,
template => $self->site->theme->template( blog => $FEEDS{$feed}{template} ),
links => {
alternate => [
$self->link(
href => $index->path,
title => 'index',
type => $index->type,
),
],
},
);
push @feed_pages, $page;
push @feed_links, $self->link(
text => $FEEDS{ $feed }{ text },
href => $page->path->stringify,
type => $page->type,
);
}
# Add the feeds to all the pages
for my $page ( @pages ) {
$page->_links->{feed} = \@feed_links;
}
return ( @pages, @feed_pages );
}
=method tag_pages
my @pages = $app->tag_pages( @post_pages );
Get L<pages|Statocles::Page> for the tags in the given blog post documents
(build from L<the post_pages method|/post_pages>, including relevant feed
pages.
=cut
sub tag_pages {
my ( $self, @post_pages ) = @_;
my %tagged_docs = $self->_tag_docs( @post_pages );
my @pages;
for my $tag ( keys %tagged_docs ) {
my @tag_pages = Statocles::Page::List->paginate(
after => $self->page_size,
path => join( "/", '', 'tag', $self->_tag_url( $tag ), 'page/%i/index.html' ),
index => join( "/", '', 'tag', $self->_tag_url( $tag ), 'index.html' ),
# Sorting by path just happens to also sort by date
pages => [ sort { $b->path cmp $a->path } @{ $tagged_docs{ $tag } } ],
app => $self,
template => $self->site->theme->template( blog => 'index.html' ),
layout => $self->site->theme->template( site => 'layout.html' ),
data => {
tag_text => $self->tag_text->{ $tag },
},
);
my $index = $tag_pages[0];
my @feed_pages;
my @feed_links;
for my $feed ( sort keys %FEEDS ) {
my $tag_file = $self->_tag_url( $tag ) . '.' . $feed;
my $page = Statocles::Page::List->new(
app => $self,
pages => $index->pages,
path => join( "/", 'tag', $tag_file ),
template => $self->site->theme->template( blog => $FEEDS{$feed}{template} ),
links => {
alternate => [
$self->link(
href => $index->path,
title => $tag,
type => $index->type,
),
],
},
);
push @feed_pages, $page;
push @feed_links, $self->link(
text => $FEEDS{ $feed }{ text },
href => $page->path->stringify,
type => $page->type,
);
}
# Add the feeds to all the pages
for my $page ( @tag_pages ) {
$page->_links->{feed} = \@feed_links;
}
push @pages, @tag_pages, @feed_pages;
}
return @pages;
}
=method pages
my @pages = $app->pages;
Get all the L<pages|Statocles::Page> for this application.
=cut
sub pages {
my ( $self ) = @_;
my @post_pages = $self->post_pages;
return (
( map { $self->$_( @post_pages ) } qw( index tag_pages ) ),
$self->post_files,
@post_pages,
);
}
=method tags
my @links = $app->tags;
Get a set of L<link objects|Statocles::Link> suitable for creating a list of
tag links. The common attributes are:
text => 'The tag text'
href => 'The URL to the tag page'
=cut
sub tags {
my ( $self ) = @_;
my %tagged_docs = $self->_tag_docs( @{ $self->_post_pages } );
return map {; $self->link( text => $_, href => join( "/", 'tag', $self->_tag_url( $_ ), '' ) ) }
sort keys %tagged_docs
}
sub _tag_docs {
my ( $self, @post_pages ) = @_;
my %tagged_docs;
for my $page ( @post_pages ) {
for my $tag ( @{ $page->document->tags } ) {
push @{ $tagged_docs{ $tag } }, $page;
}
}
return %tagged_docs;
}
sub _tag_url {
my ( $self, $tag ) = @_;
$tag =~ s/\s+/-/g;
return $tag;
}
=method recent_posts
my @pages = $app->recent_posts( $count, %filter );
Get the last $count recent posts for this blog. Useful for templates and site
index pages.
%filter is an optional set of filters to apply to only show recent posts
matching the given criteria. The following filters are available:
=over 4
=item tags
(string) Only show posts with the given tag
=back
=cut
sub recent_posts {
my ( $self, $count, %filter ) = @_;
my $today = Time::Piece->new->ymd;
my @pages;
my @docs = $self->_sorted_docs;
DOC: for my $doc ( @docs ) {
QUERY: for my $attr ( keys %filter ) {
my $value = $filter{ $attr };
if ( $attr eq 'tags' ) {
next DOC unless grep { $_ eq $value } @{ $doc->tags };
}
}
my $page = $self->_make_post_page( $doc );
$page->path( join "/", $self->url_root, $page->path );
push @pages, $page;
last if @pages >= $count;
}
return @pages;
}
=method page_url
my $url = $app->page_url( $page )
Return the absolute URL to this L<page object|Statocles::Page>, removing the
"/index.html" if necessary.
=cut
# XXX This is TERRIBLE. We need to do this better. Perhaps a "url()" helper in the
# template? And a full_url() helper? Or perhaps the template knows whether it should
# use absolute (/whatever) or full (http://www.example.com/whatever) URLs?
sub page_url {
my ( $self, $page ) = @_;
my $url = "".$page->path;
$url =~ s{/index[.]html$}{/};
return $url;
}
1;
__END__
=head1 DESCRIPTION
This is a simple blog application for Statocles.
=head2 FEATURES
=over
=item *
Content dividers. By dividing your main content with "---", you create
sections. Only the first section will show up on the index page or in RSS
feeds.
=item *
RSS and Atom syndication feeds.
=item *
Tags to organize blog posts. Tags have their own custom feeds so users can
subscribe to only those posts they care about.
=item *
Crosspost links to redirect users to a syndicated blog. Useful when you
participate in many blogs and want to drive traffic to them.
=item *
Post-dated blog posts to appear automatically when the date is passed. If a
blog post is set in the future, it will not be added to the site when running
C<build> or C<deploy>.
In order to ensure that post-dated blogs get added, you may want to run
C<deploy> in a nightly cron job.
=back
=head1 COMMANDS
=head2 post
post [--date <date>] <title>
Create a new blog post, optionally setting an initial C<title>. The post will be
created in a directory according to the current date.
Initial post content can be read from C<STDIN>. This lets you write other programs
to generate content for blog posts (for example, to help automate release blog posts).
=head1 THEME
=over
=item blog => index
The index page template. Gets the following template variables:
=over
=item site
The L<Statocles::Site> object.
=item pages
An array reference containing all the blog post pages. Each page is a hash reference with the following keys:
=over
=item content
The post content
=item title
The post title
=item author
The post author
=back
=item blog => post
The main post page template. Gets the following template variables:
=over
=item site
The L<Statocles::Site> object
=item content
The post content
=item title
The post title
=item author
The post author
=back
=back
=back
=head1 SEE ALSO
=over 4
=item L<Statocles::App>
=back