From d965dd6fd1e9fb5e09a8152b56ba259c8e512a6d Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Wed, 11 Oct 2023 16:14:03 -0400
Subject: [PATCH] Implement get_additional_properties for Document.

---
 src/types/document.rs | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/src/types/document.rs b/src/types/document.rs
index 34375864..11022615 100644
--- a/src/types/document.rs
+++ b/src/types/document.rs
@@ -93,8 +93,7 @@ impl<'s> Heading<'s> {
     }
 
     pub fn get_additional_properties(&self) -> impl Iterator<Item = &NodeProperty<'s>> {
-        let foo = self
-            .children
+        self.children
             .iter()
             .take(1)
             .filter_map(|c| match c {
@@ -107,7 +106,28 @@ impl<'s> Heading<'s> {
                 Element::PropertyDrawer(property_drawer) => Some(property_drawer),
                 _ => None,
             })
-            .flat_map(|property_drawer| property_drawer.children.iter());
-        foo
+            .flat_map(|property_drawer| property_drawer.children.iter())
+    }
+}
+
+impl<'s> Document<'s> {
+    pub fn get_additional_properties(&self) -> impl Iterator<Item = &NodeProperty<'s>> {
+        let zeroth_section_children = self
+            .zeroth_section
+            .iter()
+            .flat_map(|zeroth_section| zeroth_section.children.iter());
+        let property_drawer = zeroth_section_children
+            .take_while(|element| match element {
+                Element::Comment(_) => true,
+                Element::PropertyDrawer(_) => true,
+                _ => false,
+            })
+            .find_map(|element| match element {
+                Element::PropertyDrawer(property_drawer) => Some(property_drawer),
+                _ => None,
+            });
+        property_drawer
+            .into_iter()
+            .flat_map(|property_drawer| property_drawer.children.iter())
     }
 }