Add series data structure

lib/Config.rakumod

@@ -24,6 +24,7 @@ method generate-post(Post:D $post, BlogMeta:D $meta) {
           ]
        ]
     ];
+    # TODO: Setup Comments
     # TODO: Setup footer
     # my $footer;
 

lib/DB.rakumod

@@ -9,6 +9,7 @@ use XML;
 use XQ;
 
 use DB::Post;
+use DB::Series;
 use DB::BlogMeta;
 use DB::MarkdownPost;
 use DB::IdrisPost;
@@ -25,6 +26,8 @@ class PostDB {
    #| A mapping from post ids to posts
    # has %.posts is Posts;
    has %.posts{Int} of PostTypes = %();
+   #| A mapping from series ids to series
+   has %.series{Int} of Series = %();
    #| The post id to use for placeholder posts
    has Int $.placeholder-id = 0;
 
@@ -57,9 +60,11 @@ class PostDB {
    #| Write a database to a directory
    method write(IO::Path:D $dir) {
        my $posts-dir = $dir.add('posts/');
+       my $series-dir = $dir.add('series/');
        # Make sure directory structrue exists
        mkdir $dir unless $dir.e;
        mkdir $posts-dir unless $posts-dir.e;
+       mkdir $series-dir unless $series-dir.e;
        # Write out metadata
        # TODO: Track changes and only write changed files
        $dir.add('meta.json').spurt: $!meta.to-json(:sorted-keys);
@@ -67,6 +72,10 @@ class PostDB {
        for %!posts.kv -> $key, $value {
           $posts-dir.add("$key.json").spurt: $value.to-json(:sorted-keys);
        }
+       # Write out the series
+       for %!series.kv -> $key, $value {
+          $series-dir.add("$key.json").spurt: $value.to-json(:sorted-keys);
+       }
    }
 
    #| Render the site to the provided output directory
@@ -114,6 +123,7 @@ class PostDB {
            $tags-dir.add("$tag.html").spurt:
                $config.generate-tag-page(self, $tag);
        }
+       # TODO: Generate the series pages
        # Render the rss/atom feed
        my $atom-path = $out-dir.add('atom.xml');
        my $atom = posts-to-atom self;
@@ -135,6 +145,7 @@ class PostDB {
 #| Read the database out of a directory
 sub read-db(IO::Path:D $dir --> PostDB:D) is export {
    my $posts-dir = $dir.add('posts/');
+   my $series-dir = $dir.add('series/');
    die "DB directory does not exist" unless $dir.e;
    die "posts directory does not exist" unless $posts-dir.e;
    # Read metadata
@@ -160,6 +171,16 @@ sub read-db(IO::Path:D $dir --> PostDB:D) is export {
            }
        }
    }
-   # Build db structure
-   PostDB.new: meta => $meta, posts => %posts
+   # Read series
+   my %series{Int} of PostTypes = %();
+   # For backwards compatability, the series directory is optional. It will be
+   # created on the next db operation, but we don't need it to read the site
+   if $series-dir.e {
+       for dir $series-dir -> $series {
+           my $id = $series.extension("").basename.Int;
+           %series{$id} = Series.from-json: $series.slurp;
+       }
+   }
+   # Build db structure
+   PostDB.new: meta => $meta, posts => %posts, series => %series
 }

lib/DB/Series.rakumod

@@ -0,0 +1,15 @@
+use v6.e.PREVIEW;
+
+use JSON::Class:auth<zef:vrurg>;
+
+#| A plain markdown post
+unit class Series is json(:pretty);
+
+#| The title of a series
+has Str:D $.title is required;
+
+#| The description of a series
+has Str:D $.desc is required;
+
+#| The ids of the posts in the series, in series order
+has Int:D @.post-ids = [];