From cbe2010407becc0615e28ac9ae32424a2c3d537f Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Sun, 17 Dec 2023 17:26:15 -0500
Subject: [PATCH] Invoke dust to render the stream pages.

At this point the render_blog_stream function is done, but RenderBlogStream::new needs to be implemented to actually generate the render context. The body of this function should be similar to convert_blog_post_page_to_render_context.
---
 src/command/build/render.rs | 36 ++++++++++++++++++++++++++----------
 src/context/blog_stream.rs  |  2 ++
 src/context/mod.rs          |  1 +
 3 files changed, 29 insertions(+), 10 deletions(-)

diff --git a/src/command/build/render.rs b/src/command/build/render.rs
index a40f158..06eddb3 100644
--- a/src/command/build/render.rs
+++ b/src/command/build/render.rs
@@ -5,6 +5,7 @@ use include_dir::include_dir;
 use include_dir::Dir;
 
 use crate::config::Config;
+use crate::context::RenderBlogStream;
 use crate::error::CustomError;
 use crate::intermediate::convert_blog_post_page_to_render_context;
 use crate::intermediate::get_web_path;
@@ -35,7 +36,7 @@ impl SiteRenderer {
         }
     }
 
-    pub(crate) async fn render_blog_posts(&self, config: &Config) -> Result<(), CustomError> {
+    fn init_renderer_integration(&self) -> Result<DusterRenderer<'_>, CustomError> {
         let mut renderer_integration = DusterRenderer::new();
 
         let sources: Vec<_> = MAIN_TEMPLATES
@@ -63,6 +64,12 @@ impl SiteRenderer {
             renderer_integration.load_template(name, contents)?;
         }
 
+        Ok(renderer_integration)
+    }
+
+    pub(crate) async fn render_blog_posts(&self, config: &Config) -> Result<(), CustomError> {
+        let renderer_integration = self.init_renderer_integration()?;
+
         for blog_post in &self.blog_posts {
             for blog_post_page in &blog_post.pages {
                 let output_path = self
@@ -91,15 +98,7 @@ impl SiteRenderer {
     }
 
     pub(crate) async fn render_blog_stream(&self, config: &Config) -> Result<(), CustomError> {
-        // TODO: Actually render a blog stream to index.html
-
-        // Steps: sort blog posts by date, newest first
-        //
-        // Steps: group blog posts based on # of posts per page
-        //
-        // Steps: for each group, create a RenderBlogStream
-        //
-        // Steps: pass each RenderBlogStream to dust as the context to render index.html and any additional stream pages.
+        let renderer_integration = self.init_renderer_integration()?;
 
         // Sort blog posts by date, newest first.
         let sorted_blog_posts = {
@@ -158,6 +157,23 @@ impl SiteRenderer {
                     format!("stream/{}.html", page_num + 1),
                 )?)
             };
+
+            let blog_stream = RenderBlogStream::new(
+                config,
+                self.output_directory.as_path(),
+                output_file.as_path(),
+                chunk,
+                older_link,
+                newer_link,
+            )?;
+
+            // Pass each RenderBlogStream to dust as the context to render index.html and any additional stream pages.
+            let rendered_output = renderer_integration.render(blog_stream)?;
+            let parent_directory = output_file
+                .parent()
+                .ok_or("Output file should have a containing directory.")?;
+            tokio::fs::create_dir_all(parent_directory).await?;
+            tokio::fs::write(output_file, rendered_output).await?;
         }
         Ok(())
     }
diff --git a/src/context/blog_stream.rs b/src/context/blog_stream.rs
index f0b2846..f476f43 100644
--- a/src/context/blog_stream.rs
+++ b/src/context/blog_stream.rs
@@ -28,6 +28,8 @@ impl RenderBlogStream {
         output_directory: &Path,
         output_file: &Path,
         original: &[&BlogPost],
+        older_link: Option<String>,
+        newer_link: Option<String>,
     ) -> Result<RenderBlogStream, CustomError> {
         todo!()
     }
diff --git a/src/context/mod.rs b/src/context/mod.rs
index f39cf34..76a0921 100644
--- a/src/context/mod.rs
+++ b/src/context/mod.rs
@@ -65,6 +65,7 @@ mod verbatim;
 mod verse_block;
 
 pub(crate) use blog_post_page::RenderBlogPostPage;
+pub(crate) use blog_stream::RenderBlogStream;
 pub(crate) use document_element::RenderDocumentElement;
 pub(crate) use element::RenderElement;
 pub(crate) use footnote_definition::RenderRealFootnoteDefinition;