From 8b7620b0bdb32a9e2b37580b0757c24a1ed61e5e Mon Sep 17 00:00:00 2001
From: zyl <z@zyl.gay>
Date: Fri, 8 Nov 2024 11:07:31 -0800
Subject: [PATCH] add ability for the built-in frontmatter parser to also
 output

---
 src/frontmatter.rs | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/frontmatter.rs b/src/frontmatter.rs
index 054fc1a..5cf7a44 100644
--- a/src/frontmatter.rs
+++ b/src/frontmatter.rs
@@ -1,4 +1,4 @@
-use serde::de::DeserializeOwned;
+use serde::{de::DeserializeOwned, Serialize};
 
 /// Very basic YAML front matter parser.
 #[derive(Debug)]
@@ -30,3 +30,27 @@ where
 		})
 	}
 }
+
+impl<T> FrontMatter<T>
+where
+	T: Serialize,
+{
+	/// Formats the front matter and content to a string ready for saving.
+	pub fn format(&self) -> eyre::Result<String> {
+		let mut output = String::new();
+
+		if let Some(data) = &self.data {
+			output.push_str("---\n");
+			output.push_str(&serde_yml::to_string(data)?);
+			output.push_str("---\n\n");
+		}
+
+		output.push_str(&self.content);
+
+		if !output.ends_with('\n') {
+			output.push('\n');
+		}
+
+		Ok(output)
+	}
+}