Adds the blog's posts, categories, bloggers, teams and the tags that ask to be indexed to a site's /sitemap.xml, through the seo:sitemap:urls mishka_installer hook MishkaCmsCore.Runtime.Compilers.SitemapCompiler fires when it builds a site's sitemap. A post, a category, a tag, a blogger or a team written rebuilds its site's sitemap, because those resources list MishkaCmsCore.Runtime.Resources.Notifiers.SitemapRefresh.

Core lists the blog's pages whose only capture is the language. /:lang/blog/:slug also holds a slug only this extension can fill, so core hands such a page over in the payload's pages, and this fills it. A page is listed exactly when its own head lets a search engine index it, so every row a visitor can open at an indexable address is listed, with or without posts:

• a published post, at the post page, with lastmod its updated_at and images its featured_image_url, or none when it has no such image;
• an active category, at its page, with lastmod its updated_at;
• a blogger who is not archived, and an active team, at its page in each language the page answers, with lastmod its updated_at;
• a tag only when its own seo_tags hold a robots meta that says index: a public tag's page says noindex (MishkaBlog.Plugins.PageSeo) unless its own robots meta replaces that.

Each row at its own language and slug, at the address the site's URL mode gives it (MishkaCmsCore.Runtime.Languages.url/3). A kind is listed only while pages holds its page — the page whose extra says it shows that kind ("blog:post", "blog:category", "blog:tag", "blog:author", "blog:team"), which every page MishkaBlog.Provision writes says — so a page switched off, closed to visitors or marked noindex lists nothing — and a row only in a language that page answers (PageEditions.served_languages/2), so no address here 404s. A row that opens with a permission, or whose own seo_tags hold a robots meta saying noindex or none, is left out as such a page is (PageEditions.listed?/2): a post or a category in a locked category is too, as its page asks for that category's (MishkaBlog.Resources.Calculations.EffectivePermissions).

A kind whose page names permissions lists nothing: the build reads as a guest, and a guest is shown no post, category, tag, blogger or team whose page is closed to them (MishkaBlog.Resources.Preparations.OpenToActor).

The addresses follow the payload's urls as a stream, and nothing is read while the hook runs: the build reads the rows as it reads the stream, through :public_list as the blog's pages read them, on the payload's site, as a guest — a build has nobody signed in behind it, and a crawler is a guest — a hundred at a time after the last one read (MishkaCmsCore.Runtime.Compilers.SitemapCompiler.stream_rows/2). Each row is listed once, since a slug is unique on its site. Registered in MishkaBlog.Application.