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use serde::Deserialize;
use chrono::NaiveDate;
use std::path::PathBuf;
use std::fs;
#[derive(Deserialize, Debug)]
pub struct Frontmatter {
pub title: String,
pub date: NaiveDate,
#[serde(default)]
pub draft: bool,
}
#[derive(Debug)]
pub struct Page {
pub meta: Frontmatter,
pub source_path: PathBuf,
pub output_path: PathBuf,
pub body: String,
pub html: String,
}
pub fn parse_frontmatter(content: &str) -> Option<Frontmatter> {
if !content.starts_with("+++\n") {
return None;
}
let rest = &content[4..];
let end = rest.find("\n+++\n")?;
let toml_str = &rest[..end];
let meta: Frontmatter = toml::from_str(toml_str)
.expect("frontmatter failed parsed");
Some(meta)
}
pub fn parse_page(source_path: &PathBuf) -> anyhow::Result<Page> {
let content = fs::read_to_string(source_path)?;
let maybe_meta = parse_frontmatter(&content);
let meta: Frontmatter;
let body: String;
if let Some(fm) = maybe_meta {
let end_post = content.find("\n+++\n").unwrap();
println!("end_post: {}", end_post);
meta = fm;
body = content[(end_post + 5)..].to_string();
} else {
let fallback_title = source_path
.file_stem()
.and_then(|s| s.to_str())
.unwrap_or("untitled")
.to_string();
meta = Frontmatter {
title: fallback_title,
date: chrono::Utc::now().date_naive(),
draft: true,
};
body = content;
}
let html = render_markdown(&body);
let slug = meta.title.to_lowercase().replace(' ', "-");
let output_path = PathBuf::from("public").join(&slug).join("index.html");
save_file(&output_path, &html)?;
Ok (Page {
meta,
source_path: source_path.clone(),
output_path,
body,
html,
})
}
pub fn render_markdown(input: &str) -> String {
use pulldown_cmark::{Parser, Options, html};
let mut options = Options::empty();
options.insert(Options::ENABLE_STRIKETHROUGH);
options.insert(Options::ENABLE_TABLES);
let parser = Parser::new_ext(input, options);
let mut out = String::new();
html::push_html(&mut out, parser);
out
}
pub fn save_file(output_path: &PathBuf, content: &str) -> anyhow::Result<()> {
if let Some(public) = output_path.parent() {
fs::create_dir_all(public)?;
}
fs::write(output_path, content)?;
Ok(())
}
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