fix: issue #3 slow rendering

lib/bds/rendering.ex

@@ -3,43 +3,58 @@ defmodule BDS.Rendering do
 
   alias BDS.Rendering.ListArchive
   alias BDS.Rendering.PostRendering
+  alias BDS.Rendering.RenderContext
   alias BDS.Rendering.TemplateSelection
 
   def render_post_page(project_id, template_slug, assigns)
       when is_binary(project_id) and is_map(assigns) do
+    render_post_page(RenderContext.build(project_id), template_slug, assigns)
+  end
+
+  def render_post_page(%RenderContext{} = ctx, template_slug, assigns) when is_map(assigns) do
     with {:ok, template_source} <-
-           TemplateSelection.load_template_source(project_id, :post, template_slug),
+           TemplateSelection.load_template_source(ctx, :post, template_slug),
          {:ok, rendered} <-
            TemplateSelection.render_template(
-             project_id,
+             ctx,
              template_source,
-             PostRendering.post_assigns(project_id, assigns)
+             PostRendering.post_assigns(ctx, assigns)
            ) do
       {:ok, rendered}
     end
   end
 
   def render_list_page(project_id, assigns) when is_binary(project_id) and is_map(assigns) do
-    with {:ok, template_source} <- TemplateSelection.load_template_source(project_id, :list, nil),
+    render_list_page(RenderContext.build(project_id), assigns)
+  end
+
+  def render_list_page(%RenderContext{} = ctx, assigns) when is_map(assigns) do
+    with {:ok, template_source} <- TemplateSelection.load_template_source(ctx, :list, nil),
          {:ok, rendered} <-
            TemplateSelection.render_template(
-             project_id,
+             ctx,
              template_source,
-             ListArchive.list_assigns(project_id, assigns)
+             ListArchive.list_assigns(ctx, assigns)
            ) do
       {:ok, rendered}
     end
   end
 
-  def render_not_found_page(project_id, assigns \\ %{})
+  def render_not_found_page(ctx_or_project_id, assigns \\ %{})
+
+  def render_not_found_page(project_id, assigns)
       when is_binary(project_id) and is_map(assigns) do
+    render_not_found_page(RenderContext.build(project_id), assigns)
+  end
+
+  def render_not_found_page(%RenderContext{} = ctx, assigns) when is_map(assigns) do
     with {:ok, template_source} <-
-           TemplateSelection.load_template_source(project_id, :not_found, nil),
+           TemplateSelection.load_template_source(ctx, :not_found, nil),
          {:ok, rendered} <-
            TemplateSelection.render_template(
-             project_id,
+             ctx,
              template_source,
-             ListArchive.not_found_assigns(project_id, assigns)
+             ListArchive.not_found_assigns(ctx, assigns)
            ) do
       {:ok, rendered}
     end